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HomeMy WebLinkAbout2019-057-E Planning - Douglas Malinowski Lake Orange maintenance DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE [Departmental Use Only] TITLE Lake0rangeMaint2019 FY 18-19 NORTH CAROLINA SERVICES AGREEMENT UNDER $90,000.00 NO RFP/RFQ ORANGE COUNTY This Services Agreement (hereinafter "Agreement"), made and entered into this 1st day of February, 2019, ("Effective Date") by and between Orange County, North Carolina a political subdivision of the State of North Carolina (hereinafter, the "County") and Douglas P. Malinowski, (hereinafter, the "Provider"). WITNESSETH: That the County and Provider, for the consideration herein named, do hereby agree as follows: 1. Services a. Scope of Work. i) This Agreement is for services to be rendered by Provider to County with respect to (insert type of project): Selective vegetation management and slope stabilization at Lake Orange Dam. ii) By executing this Agreement, the Provider represents and agrees that Provider is qualified to perform and fully capable of performing and providing the services required or necessary under this Agreement in a fully competent, professional and timely manner. iii) Time is of the essence with respect to this Agreement. iv) The services to be performed under this Agreement consist of Basic Services, as described and designated in Section 3 hereof. Compensation to the Provider for Basic Services under this Agreement shall be as set forth herein. 2. Responsibilities of the Provider a. Services to be provided. The Provider shall provide the County with all services required in Section 3 to satisfactorily complete the Project within the time limitations set forth herein and in accordance with the highest professional standards. b. Standard of Care. i) The Provider shall exercise reasonable care and diligence in performing services under this Agreement in accordance with the highest generally accepted standards of this type of Provider practice throughout the United States and in accordance with applicable federal, state and local laws and regulations applicable to the performance of these services. Provider is solely responsible for the professional Revised 12/18 1 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE quality, accuracy and timely completion and/or submission of all work related to the Basic Services. ii) Provider shall be responsible for all errors or omissions of its agents, contractors, employees, or assigns in the performance of the Agreement. Provider shall correct any and all errors, omissions, discrepancies, ambiguities, mistakes or conflicts at no additional cost to the County. iii) The Provider shall not, except as otherwise provided for in this Agreement, subcontract the performance of any work under this Agreement without prior written permission of the County. No permission for subcontracting shall create, between the County and the subcontractor, any contract or any other relationship. iv) Provider is an independent contractor of County. Any and all employees of the Provider engaged by the Provider in the performance of any work or services required of the Provider under this Agreement, shall be considered employees or agents of the Provider only and not of the County, and any and all claims that may or might arise under any workers compensation or other law or contract on behalf of said employees while so engaged shall be the sole obligation and responsibility of the Provider. v) If activities related to the performance of this Agreement require specific licenses, certifications, or related credentials Provider represents that it and/or its employees, agents and subcontractors engaged in such activities possess such licenses, certifications, or credentials and that such licenses certifications, or credentials are current, active, and not in a state of suspension or revocation. vi) In determining the basic services to be provided, should any documents be referenced in this Agreement, the terms of this Agreement shall have priority in any conflict between the terms of referenced documents and the terms of this Agreement. Should a request for proposals and a proposal be referenced the terms of the request for proposals shall have priority over the terms of any proposal. 3. Basic Services a. Basic Services. The Services to be rendered pursuant to this Agreement are as follows (fully describe services to be provided): 1) For the entire extent of the area depicted in WHITE hatching and labeled as "Limits of Mechanical Clearing" on Attachment A, Provider shall cut and grind existing stumps/shrubs and existing uncut trees to flush with existing grade. Existing uncut trees requiring removal will be individually tagged/marked in the field by Orange County prior to work. All trimmings shall be chipped and disposed of on site, based on in-field direction by Orange County. Install erosion control blanketing and permanent seeding on denuded/steep slope areas, to be located based on in-field direction by Orange County. Erosion control blanketing and permanent seeding shall be installed per NCDEQ standards. Erosion control blanketing shall be North American Green RollMax BioNet SC150BN biodegradable erosion control blanket, or approved equal. 2) For the entire extent of the area depicted in RED hatching and labeled as "Limits of Hand Trimming" on Attachment A, Provider shall Revised 12/18 2 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE hand trim existing trees/shrubs to a level flush with the top of the existing chain link fences. Hand trimming must be conducted safely from the outside of the existing chain link fences. Any trimmings or debris that fall into the concrete spillway channel during the hand trimming process shall be removed from spillway. Existing large tree trunks that have grown into the chain link fence shall remain in place. All trimmings shall be chipped and disposed of on site, based on in-field direction by Orange County. 3) If the actual installed erosion control matting and permanent seeding quantities exceed the quoted quantity of 7,500 SF, a subsequent contract amendment will be executed between the County and the Provider to cover the cost of the additional installed erosion control matting and permanent seeding quantities, at the quoted unit price of$289/1,000 sq ft. See Attachment B for detailed quote. See Attachment C for NCDEQ erosion control blanket installation requirements. See Attachment D for North American Green RollMax BioNet SC 150BN erosion control blanket specifications. See Attachment E for NCDEQ permanent seeding application requirements. 4. Duration of Services a. Term. The term of this Agreement shall be from February 1, 2019 to June 30, 2019. b. Scheduling of Services. i) The Provider shall schedule and perform its activities in a timely manner. ii) Should the County determine that the Provider is behind schedule, it may require the Provider to expedite and accelerate its efforts, including providing additional resources and working overtime, as necessary, to perform its services in accordance with the approved project schedule at no additional cost to the County. iii) The Commencement Date for the Provider's Basic Services shall be no later than February 15, 2019. 5. Compensation a. Compensation for Basic Services. Compensation for Basic Services shall include all compensation due the Provider from the County for all services under this Agreement. The maximum amount payable for Basic Services shall not exceed NINE THOUSAND NINE HUNDRED SIXTY SEVEN AND 1/2 Dollars ($9,967.50). Payment for Basic Services shall become due and payable within thirty (30) days of Provider properly invoicing County. Payment shall be subject to provisions of Section 5(b). b. Disputes. In the event the amount stated on an invoice is disputed by the County, the County may withhold payment of all or a portion of the amount stated on an invoice until the parties resolve the dispute. Should Provider fail to perform its duties under the terms of this Agreement, County may, without fault or penalty, withhold any payment associated with the work to be performed until such time as said work is completed. c. Additional Services. County shall not be responsible for costs related to any services in addition to the Basic Services performed by Provider unless County requests such Revised 12/18 3 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE additional services in writing and such additional services are evidenced by a written amendment to this Agreement. 6. Responsibilities of the County a. Cooperation and Coordination. The County has designated (Christopher J. Sandt, P.E., Staff Engineer) to act as the County's representative with respect to the Project and shall have the authority to render decisions within guidelines established by the County Manager and/or the County Board of Commissioners and shall be available during working hours as often as may be reasonably required to render decisions and to furnish information. 7. Insurance a. General Requirements. Provider shall obtain, at its sole expense, Commercial General Liability Insurance, Automobile Insurance, Workers' Compensation Insurance, and any additional insurance as may be required by County's Risk Manager as such insurance requirements are described in the Orange County Risk Transfer Policy and Orange County Minimum Insurance Coverage Requirements (each document is incorporated herein by reference and may be viewed at http://www.orangecountync.gov/departments/purchasing division/contracts.php). If County's Risk Manager determines additional insurance coverage is required such additional insurance shall consist of N/A (if no additional insurance required mark N/A as being not applicable). Provider shall not commence work until such insurance is in effect and certification thereof has been received by the County's Risk Manager. 8. Indemnity a. Indemnity. The Provider agrees, without limitation, to defend, indemnify and hold harmless the County from all loss, liability, claims or expense, including attorney's fees, arising out of or related to the Project and arising from property damage or bodily injury including death to any person or persons caused in whole or in part by the negligence or misconduct of the Provider except to the extent same are caused by the negligence or willful misconduct of the County. It is the intent of this provision to require the Provider to indemnify the County to the fullest extent permitted under North Carolina law. 9. Amendments to the Agreement a. Changes in Basic Services. Changes in the Basic Services and entitlement to additional compensation or a change in duration of this Agreement shall be made by a written Amendment to this Agreement executed by the County and the Provider. The Provider shall proceed to perform the Services required by the Amendment only after receiving a fully executed Amendment from the County. 10. Termination a. Termination for Convenience of the County. This Agreement may be terminated without cause by the County and for its convenience upon seven (7) days' prior written notice to the Provider. Revised 12/18 4 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE b. Other Termination. The Provider may terminate this Agreement based upon the County's material breach of this Agreement; provided, the County has not taken all reasonable actions to remedy the breach. The Provider shall give the County seven (7) days' prior written notice of its intent to terminate this Agreement for cause. c. Compensation After Termination. i) In the event of termination, the Provider shall be paid that portion of the fees and expenses that it has earned to the date of termination, less any costs or expenses incurred or anticipated to be incurred by the County due to errors or omissions of the Provider. ii) Should this Agreement be terminated, the Provider shall deliver to the County within seven (7) days, at no additional cost, all deliverables including any electronic data or files relating to the Project. d. Waiver. The payment of any sums by the County under this Agreement or the failure of the County to require compliance by the Provider with any provisions of this Agreement or the waiver by the County of any breach of this Agreement shall not constitute a waiver of any claim for damages by the County for any breach of this Agreement or a waiver of any other required compliance with this Agreement. e. Suspension. County may suspend the Basic Services and this Agreement at any time for County's convenience and without penalty to County upon three (3) days' notice to Provider. Upon any suspension by County, Provider shall discontinue work on the Basic Services and shall not resume the Basic Services until notified to proceed by County. 11. Additional Provisions a. Limitation and Assignment. The County and the Provider each bind themselves, their successors, assigns and legal representatives to the terms of this Agreement. Neither the County nor the Provider shall assign or transfer its interest in this Agreement without the written consent of the other. b. Governing Law. This Agreement and the duties, responsibilities, obligations and rights of respective parties hereunder shall be governed by the laws of the State of North Carolina. By executing this Agreement Provider affirms that Provider and any subcontractors of Provider are and shall remain in compliance with Article 2 of Chapter 64 of the North Carolina General Statutes. By executing this Agreement Provider certifies that Provider has not been identified, and has not utilized the services of any agent or subcontractor identified, on the list created by the State Treasurer pursuant to G.S. 147-86.58. By executing this Agreement Provider certifies that Provider has not been identified, and has not utilized the services of any agent or subcontractor identified, on the list created by the State Treasurer pursuant to G.S. 147-86.81. c. Non-Discrimination. Provider shall at all times remain in compliance with all applicable local, state, and federal laws, rules, and regulations including but not limited to all state and federal non-discrimination laws, policies, rules, and regulations and the Orange Revised 12/18 5 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE County Non-Discrimination Policy and Orange County Living Wage Policy(each policy is incorporated herein by reference and may be viewed at http://www.oran-e�ync. og v/departments/purchasing division/contracts.php.) Any violation of the Orange County Non-Discrimination Policy is a breach of this Agreement and County may immediately terminate this Agreement without further obligation on the part of the County. This paragraph is not intended to limit and does not limit the definition of breach to discrimination. d. Dispute Resolution. Any and all suits or actions to enforce, interpret or seek damages with respect to any provision of, or the performance or non-performance of, this Agreement shall be brought in the General Court of Justice of North Carolina sitting in Orange County, North Carolina. It is agreed by the parties that no other court shall have jurisdiction or venue with respect to such suits or actions. Binding arbitration may not be initiated by either Party, however, the Parties may agree to nonbinding mediation of any dispute prior to the bringing of such suit or action. e. Entire Agreement. This Agreement represents the entire and integrated agreement between the County and the Provider and supersedes all prior negotiations, representations or agreements, either written or oral. This Agreement may be amended only by written instrument signed by both parties. Modifications may be evidenced by facsimile signatures. f. Severability. If any provision of this Agreement is held as a matter of law to be unenforceable, the remainder of this Agreement shall be valid and binding upon the Parties. g. Ownership of Work Product. Should Provider's performance of this Agreement generate documents, items or things that are specific to this Project such documents, items or things shall become the property of the County and may be used on any other project without additional compensation to the Provider. The use of the documents, items or things by the County or by any person or entity for any purpose other than the Project as set forth in this Agreement shall be at the full risk of the County. h. Non-Appropriation. Provider acknowledges that County is a governmental entity, and the validity of this Agreement is based upon the availability of public funding under the authority of its statutory mandate. In the event that public funds are unavailable and not appropriated for the performance of County's obligations under this Agreement, then this Agreement shall automatically expire without penalty to County immediately upon written notice to Provider of the unavailability and non-appropriation of public funds. It is expressly agreed that County shall not activate this non-appropriation provision for its convenience or to circumvent the requirements of this Agreement, but only as an emergency fiscal measure during a substantial fiscal crisis. In the event of a change in the County's statutory authority, mandate and/or mandated functions, by state and/or federal legislative or regulatory action, which adversely affects County's authority to continue its obligations under this Agreement, then this Agreement shall automatically terminate without penalty to County upon written notice to Provider Revised 12/18 6 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE of such limitation or change in County's legal authority. i. Si_ atures. This Agreement together with any amendments or modifications may be executed electronically. All electronic signatures affixed hereto evidence the consent of the Parties to utilize electronic signatures and the intent of the Parties to comply with Article 11A and Article 40 of North Carolina General Statute Chapter 66. j. Notices. Any notice required by this Agreement shall be in writing and delivered by certified or registered mail, return receipt requested to the following: Orange County Provider's Name Attention:Christopher J. Sandt, P.E. Douglas P. Malinowski P.O. Box 8181 1005 Dimmocks Mill Rd Hillsborough,NC 27278 Hillsborough,NC 27278 [SIGNATURE PAGE TO FOLLOW] Revised 12/18 7 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE IN WITNESS WHEREOF, the Parties, by and through their authorized agents, have hereunder set their hands and seal, all as of the day and year first above written. ORANGE COUNTY: PROVIDER: E.7994B755E477 Signed by: Docuftned by: B By: Y . County Manager Douglas P. Malinowski, Sole Proprietor Printed Name and Title Revised 12/18 8 DocuSi n Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Attachment A - Limits of Work Legend �.? Hand Trimming (inside fence) '-w ••.,, Mechanical Clearing Limits of Mechanical Clearing (outfall pipe) - Limits of Hand Trimming (inside fence) Limits of Mechanical Clearing (concrete spillway/channel) "` f Limits of Mechanical Clearing (concrete spillway/channel) ■ ■ le Earth O2018 •og- 200 ft DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Attachment B Quote Wellsmont Landscaping 1005 Dimmocks Mill Rd � 1, � Hillsborough, NC 27278 � ` � P m919.810.6282 '.l19-810 . 6282 Customer Customer Number OR1 Quote Date January 28, 2019 Orange County Sales Person DPM 131 W. Margret Lane, PO Box 8181 Expiration Date June 28, 2019 Hillsborough, NC 27278 Terms Proposal Name Orange Lake Dam Winter 2019 Project Name Proposal Number 2018-190 Version Number 1 SKU Size/ Description Quantity Unit Extended Unit Price Price per Clearing/Trimming Around The Perimeter Of The 1.00 $7,800.00 $7,800.00 Lake Orange Spillway, Outfall Channel, and Outfall Pipe. See Notes 1&2 Below 1000 sq ft Install erosion matting and seeding. Price includes 7.50 $289.00 $2,167.50 matting, seed,fertilizer, lime and labor. Seed worked into soil by tractor/aerator or by hand rake if inaccessible by tractor.Fescue/Rye mix to be used during cool seasons Taxable $0.00 Tax Exempt $9,967.50 Tax $0.00 Total $9,967.50 1 1)Cut and Grind existing stumps/shrubs flush to existing grade(Winter 2018 ) a. Depicted with WHITE hatching on attached exhibit b. Late November timeframe, once trees/shrubs are defoliated c. Exisiting uncut trees to be removed will be marked in the field by Orange County prior to work d. Install erosion blankets on denuded/steep slope areas, based on in-field direction by Orange County(Shown in line item as per 1000 sq ft) e.All trimmings shall be chipped and diposed of on site, based on in-field direction by Orange County 2) Hand trim trees/shrubs to a level flush with the top of the existing chain link fences(Winter 2018) a. Depicted with RED hatching on attached exhibit b. Late November timeframe, once trees/shrubs are defoliated c. Hand trimming to be done safely from the OUTSIDE of the existing chain link fences d.Any trimmings that fall into the concrete spillway channel removed from spillway e. Large tree trunks/stumps that have grown into the chain link fence shall remain in place f.All trimmings shall be chipped and disposed of on site, based on in-field direction by Orange County 1 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Attachment C - NCDEQ Erosion Control Blanket Specs Practice Standards and Specifications 6.17 ROLLED EROSION CONTROL PRODUCTS RECP Definition Rolled erosion control products are manufactured or fabricated into rolls designed to reduce soil erosion and assist in the growth, establishment and protection of vegetation. Examples of RECP's are blankets, nets, and matting. Purpose Erosion control mats and blankets are intended to protect soil and hold seed and mulch in place on slopes and in channels so that vegetation can become well established. Turf reinforcement mats can be used to permanently reinforce grass in drainage ways during high flows. Nets are made of high tensile material woven into an open net which overlays mulch materials. Blankets are made of interlocking fibers, typically held together by a biodegradable or photodegradable netting(for example, excelsior or straw blankets). They generally have lower tensile strength than nets, but cover the ground more completely. Coir(coconut fiber)fabric comes as both nets and blankets. Conditions Where Rolled Erosion Control Products (RECP's) should be used to aid permanent vegetated stabilization of slopes 2:1 or greater and with more than 10 feet of Practice Applies vertical relief. RECP's should also be used when mulch cannot be adequately tacked and where immediate ground cover is required to prevent erosion damage. RECP's should be used to aid in permanent stabilization of vegetated channels when runoff velocity will exceed 2 ft/sec on bare earth during the 2-year rainfall event that produces peak runoff. The product selected must have a permissible shear stress that exceeds the shear stress of the design runoff event. Planning • Good ground contact is critical to the effectiveness of these products. If Considerations good ground contact is not achieved, runoff can concentrate under the product,resulting in significant erosion. • Nets must be used in conjunction with mulch. Excelsior, woven straw blankets and coir(coconut fiber)blankets may be installed without mulch. There are many other types of erosion control nets and blankets on the market that may be appropriate in certain circumstances. In general,most nets(e.g.jute matting)require mulch in order to prevent erosion because they have a fairly open structure. Blankets typically do not require mulch because they usually provide complete protection of the surface. • Most netting used with blankets is photodegradable,meaning they break down under sunlight(not UV stabilized). However,this process can take months or years even under bright sun. Once vegetation is established, sunlight does not reach the mesh. It is not uncommon to find non- degraded netting still in place several years after the installation. This can be a problem if maintenance requires the use of mowers or ditch cleaning equipment. In addition,birds and small animals can become trapped in the netting. Rev.6/06 6.17.1 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE • Biodegradable blankets are available for use in sensitive areas. These organic blankets are usually held together with a fiber mesh and stitching which may last up to a year. Design Criteria The following discussion and examples of design are adapted from "Green Engineering, Design Principles and Applications Using Rolled Erosion Control Products"by C.Joel Sprague. Slope Protection: Reducing raindrop and overland flow erosion. The Revised Universal Soil Loss Equation(RUSLE),as shown below,is commonly used to estimate erosion due to rainfall and sheet runoff. A= R * K* LS * C * P where: A=soil loss in tons/acre/year R=rain factor K=soil erodibility LS=topographic factor C=cover factor P=practice factor The United States Department of Agriculture's handbook, "Predicting Soil Erosion by Water: A Guide to Conservation Planning with the Revised Universal Soil Loss Equation(RUSLE), 1997,"provides agriculture-oriented values for all of these variables. Yet, when the equation is used to estimate construction-related erosion,the following unique C-and P-factors developed specifically for these applications should be used. The C-Factor—C-factors are equal to the reduction in soil loss when using a specific erosion control system when compared to the comparable bare soil (control) condition. The designer will require C-factors representing various conditions from unvegetated to fully vegetated, including vegetation, which has been mulched or,alternatively,protected by an RECP,in order to determine an appropriate factor to be used to represent the design condition. (See Table 6.17a for a range of C-factors.) 6.17.2 Rev.6/06 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications Table 6.17a C-Factor for Various Slope Treatments Treatment Dry Mulch Rate C-Factor for Growing Period* kg/m3 Slope % <6 Weeks 1.5-6 Months 6-12 Months Annualized** No mulching or seeding - all 1.00 1.00 1.00 1.00 Seeded grass none all 0.70 0.10 0.05 0.15 0.22 <10 0.20 0.07 0.03 0.07 0.34 <10 0.12 0.05 0.02 0.05 0.45 <10 0.06 0.05 0.02 0.04 0.45 11 - 15 0.07 0.05 0.02 0.04 0.45 16 -20 0.11 0.05 0.02 0.04 0.45 21 -25 0.14 0.05 0.02 0.05 0.45 26 - 33 0.17 0.05 0.02 0.05 0.45 34 - 50 0.20 0.05 0.02 0.05 Second-year grass - all 0.01 0.01 0.01 0.01 Organic and Synthetic Blankets - all 0.07 0.01 0.005 0.02 Composite Mats - all 0.07 0.01 0.005 0.02 Synthetic Mats - all 0.14 0.02 0.005 0.03 Fully Vegetated Mats - all 0.005 0.005 0.005 0.005 *Approximate time periods for humid climates: Conversion: kg/m3 x 4.45 = tons/acre. **Annualized C-Factor= (<6 weeks value x 6/52) + (1.5-6 months value x 20/52) + (6-12 months value x 26/52). Table 6.17b Permissible Shear Stress, rp, of Various RECP's Max. Permis- Slopes* Category Product Type sible Shear Stress Up To (lb/ft2) Degradable RECP's (Unvegetated) Nets and Mulch 0.1 - 0.2 20:1 Coir Mesh 0.4 - 3.0 3:1 Blanket- Single Net 1.55-2.0 2:1 Blanket- Double Net 1.65- 3.0 1:1 Nondegradable RECP's Unvegetated TRM** 2 -4 1:1 Partially Vegetated TRM 4 - 6 >1:1 Fully Vegetated 5- 10 >1:1 * Steeper slope limits may apply. For further information, contact the manufacturer. **Turf Reinforcement Mat. Rev.6/06 6.17.3 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE The P-Factor—when examining erosion by itself,is commonly taken as 1.0, si nce thi s assumes that no sped al "practi ces" (i.e.terraci ng, contouri ng, etc.) wi I I be used. Yet, the use of si I t fences or other storm water management/ sediment control practices may be integrated into the RUSLE using a P-factor that is less than 1.0, which reflects the effectiveness of the sediment control practice in removing sediment from runoff. Sample Problem A steep slope is to be protected from erosion using RECP. The 3H:1V 6.17a slope is 100 feet long and comprised of silty loam. The RUSLE will be used to evaluate the effectiveness of RECP in limiting annual soil loss. Following are the inputs to the RUSLE equation from the U.S. Department of Agriculture: R = 250 K= 0.33 LS = 6.2 P = 1.0 (assuming no sediment control) From Table 6.17a: unprotected = 1.00 protected, year 1 = 0.03 protected, year 2+ = 0.005 Aunprotected = 250 x 0.33 x 6.2 x 1.0 x 1.0 = 511 tons/acre/year Aprotected, year 1 = 250 x 0.33 x 6.2 x 0.03 x 1.0 = 15 tons/acre/year Aprotected, year 2+ = 250 x 0.33 x 6.2 x 0.005 x 1.0 = 3 tons/acre/year This example shows that vegetation, protected by an RECP, is 97 percent effective in reducing erosion in the first year and 99.5 percent effective in the longer-term. Table 6.17b aids in selecting an appropriate type of RECP for the project-specific slope. Drainage Channels Concepts—Permissible shear design is commonly used to determine if a channel I i ner is stable. This method requires the input of an appropriate expected flow rate(discharge)as well as the determination of flow depth. A broader presentation of channel design is located in Appendix 8.05, Design of Stable Channels and Diversions. The design flow rate will be based on local storm frequency design standards and flow depth is calculated - commonly using Manning's equation. With these inputs the designer can then perform a permissible shear design, which compares the permissible shear of the prospective I i ner materials to the expected flow-induced shear as calculated using the equation below. ' =YDS where: Y=unit weight of water(62.4lb/ft3) =depth of flow(ft) S =channel slope(ft/ft) 6.17. Rev.6/06 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications f the permi ssi bl a shear stress, T , i s greater than the computed shear, T , the lining is considered acceptable. Values for permissible shear stress, T , for linings are based on research conducted at laboratory f aci I i ti es and in the field. Typical values are given in Table 6.17b. The permissible shear stress, T ,indicates the force per unit area resulting from flowing water required to create i nstabi I i ty of the I i ni ng materi a1 and/or ad acent soi 1. Manning's Equation and Roughness Coefficient, n The condition of uniform, steady flow in a channel at a known discharge is computed using the anning s quation below. umerous computer programs are available to facilitate the use of this equation since a trial-and-error solution relating channel width, B,and depth, isrequired. Q = (1.49/n) (A) (R)2/3 )1/2 anni ng s equati on for determi ni ng vel oci ty: V= (1.49/n) (R)2/3 )1/2 where: =discharge(cfs) =average vel oci ty in cross section(ft/s) n=Manning's roughness coefficient A=cross-sectional area(ft) R= hydraul i c radius=A/P(ft) =wetted perimeter(ft) = energy gradient (commonly to en as equivalent to the channel bed slope,ft/ft) The appropri ate anni ng s "n" to use when designing with PS depends on whether one is designing for bare soil retention and vegetation establishment(short-term)or for fully grassed conditions(long term),or both. The°n"values for RECP's can vary significantly with material type and flow depth, but they typi cal I y range from . to . and are usual I y provided by the manufacturer. In lieu of product-specific information, the following values can be used as approximations. nunvegetated = 0.02 nvegetated = refer to Table 6.17c and Figure 6.17a n1ined = refer to Table 8.05e Table 6.17c rass Retar ance Cate ories Average Grass Length Retardance >24 in. A 10 in. to 24 in. B 6 in. to 10 in. 2 in. to 6 in. Less than 2 in. Rev.6/06 6.17. DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE M Fi ure 6.17a Hydraulic roughness of .4 grass .3 - .2 ~� .1 .08 - .06 1-4 O .05 .04 .03 .02 J 119 1 2 3 4 56 8 1 2 3 4 56 81015 VR ft2/sec Fi ure 6.17b Limiting values for bare (') 21 S (400) and TRM protected soils (6) 18 7 \ (350) v � v N M 15 6 (300) 4- Soil Protected (4) >. 12 wit CB 5 (250) U L (3) 0 9 4 (zoo) (2) > 5 Soil Protecte 3 (moo) ith H T (1) 3 _I _ 2 (100) (0) —1 (50) 1 2 5 10 20 50 Time (hours) g) 21 8 (400) Fi ure 6.17c Limiting values for plain TRM Rein- � and TRM reinforced grass (e) 18 orced 6 ss 7 (350) N (5) 15 6 (300) (4) >12 5rass with - 5 (250) (3) 0 9 Ground Cover 4 d (zoo) m 03 S (2) en 5 3 (15a) (1) :t 3 (ar�ss with 2 f- (100) C__ Poor C ver (0) —S 0 1 —1 (50) 1 2 5 10 20 50 Time (hours) 6.17.6 Rat.6/06 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications Sample Problem Determine if an RECP-lined drainage channel will be stable for a long- 6.17b term peak flow (10-year design storm) of 70 cfs down a 20:1 slope (S=0.05)with a 4 foot bottom width and 1:1 side slopes.The duration of flow is 50 hours for long-term and one hour for short-term design. The grass cover is expected to be in retardance group D.Short-term stability can be checked using the two-year design storm, which produces a short-term peak flow of 45 cfs. on -term esi n = vegetated channel stability • Use Qpeak = Q10-year= 70 cfs • From Figure 6.17c: Limiting shear= 6 Ib/ftz • Assume nvegetated = 0.05 Solve for the depth of flow using iterations of Manning's equation. An Excel spreadsheet located on the internet at http://www.dIr.enr.state. nc.us/pages/sedimenttecassist.html or commercially available channel software is recommended. For trapezoidal channels: (bd +zd2) 2/3 Qn (bd + zdz) _ b + 2d (z2 + 1)ti2 1.49S1/2 From trial-and-error, d = 1.7ft Determine area of flow A, from A= (bd +zdz) = 9.8ftz Since slope < 1:10, calculate VR using: estimate = 7.1 ft/s; VR= (7.1ft/s) (1.11) = 7.88ft/s From Figure 6.17a: Use n = 0.032. Recalculate d = 1.34ft A= 7.14ft2 Check shear stress L =YDS = (62.4) (1.34) (0.05) = 4.18 Ib/ftz 4.18 < 6 Ib/ftz, therefore acceptable Rev.6/06 6.17.7 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE B Sample Problem Short-term esi n = bare soil channel stability 6.17b con't. • _ _Use Qpeak- Q2-year-45 CfS • From Figure 6.17b: Limiting shear=4.5 Ib/ft2 • For mat on bare soil, n = 0.03 Determine depth of flow via trail-and-error using Manning's Equation: For trapezoidal channels: (bd + zd2) (bd + zd2) 2/3 = Qn (bd + zd2) b + 2d (z2 + 1)1/2 1.49S112 From trial-and-error, d = 1.0ft Check shear stress T=YDS _ (62.4) (1.0) (0.05) = 3.12 1 b/ft2 3.12 < 4.5 Ib/ft2, therefore acceptable Construction Specifications ven if properly designed, if not properly installed, Ps will probably not function as desired. Proper i nstal I ati on is imperative. ven if properly i nstal I ed, if not properly timed and nourished, vegetation will probably not grow as desi red. Proper seed/vegetation selection i s al so imperative. rade the surface of i nstal I ati on areas so that the ground is smooth and loose. hen seedi ng pri or to i nstal I ati on, fol I ow the steps for seed bed preparati on, soi I amendments, and seedi ng i n S rfa e Stabili ation, 6.1. All gullies,rills, and any other disturbed areas must be fine graded prior to installation. Spread seed before P i nstal I ati on.( : emove al I I arge roc s,di rt cl ods, stumps,roots,grass cl umps,trash,and other obstructionsfrom the soi I surface to ad ow for di rect contact between the soi I surface and the P.) Termi nod anchor trenches are requi red at P ends and i ntermi ttent trenches must be constructed across channels at 25-foot intervals. Terminal anchor trenches should be a minimum of 12 inches in depth and 6 inches in width, while intermittent trenches need be only 6 inches deep and 6 inches wide. Installation for Slopes—Place the RECP 2-3 feet over the top of the slope and into an excavated end trench measuring approximately 12 inches deep by 6 inches wide. Pin the RECP at I foot intervals along the bottom of the trench, backfill, and compact. Unroll the RECP down (or along) the slope maintaining direct contact between the soil and the RECP. Overlap adjacent rol I s a mi ni mum of 3 i nches. R n the P to the ground using staples or pins in a 3 foot center-to-center pattern. Less frequent stapling/pinning is acceptable on moderate slopes. 6.17. Rev.6/06 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications e —Excavate terminal trenches(12 inches deep and 6 inches wide)across the channel at the upper and lower end of the I i ned channel sections. At 25-foot intervals along the channel, anchor the RECP across the channel either in 6 inch by 6 inch trenches or by installing two closely spaced rows of anchors. Excavate longitudinal trenches 6 inches deep and wide along channel edges(above water I i ne) i n whi ch to bury the outsi de P edges. Place the first RECP at the downstream end of the channel. Place the end of the first RECP in the terminal trench and pin it at 1 foot intervals along the bottom of the trench. Note:The P should be placed upside down in the trench with the roll on the downstream si de of the bench. Once pinned and backfilled, the RECP is deployed by wrapping over the top of the trench and unrol I i ng upstream. f the channel i s wi der than the provi ded rol I s, pl ace ends of ad acent rot I s i n the termi nal trench,overl appi ng the adjacent rolls a minimum of 3 inches.Pin at 1 foot intervals,backfill, and compact. Unroll the RECP in the upstream direction until reaching the first intermittent trench. old the P bac over itself, positioning the roll on the downstream si de of the trench, and ad owi ng the mat to conform to the trench. Then pin the RECP (two layers) to the bottom of the trench, backfill, and compact. onti nue up the channel (wrapping over the top of the i ntermittent trench) repeating this step at other intermittent trenches, until reaching the upper terminal trench. t the upper terminal trench, allow ow the P to conform to the trench, secure with pins or staples, backfill, compact and then bring the mat back over the top of the trench and onto the existing mat(2 to 3 feet overlap in the downstream direction), and pin at foot i nterval s across the P. hen starting installation of a new roll,begin in a trench or shingle-lap ends of rolls a mi ni mum of foot with upstream Pon top to prevent uplifting. Race the outside edges of the RECP(s) in longitudinal trenches, pin, backfill, and compact. Anchoring Devices 11 gauge,at least 6 inches length by 1 inch width staples or i nch mi ni mum I ength wooden sta es are recommended for anchori ng the P to the ground. Drive staples or pins so that the top of the staple or pin is flush with the ground surface. nchor each P every 3 feet along its center. ongitudinal overlaps must be sufficient to accommodate a row of anchors and uniform along the entire length of overlap and anchored every 3 f eet along the over)ap length. of I ends may be spl i ced by overl appi ng foot (i n the di recti on of water flow),with the upstream/upslope mat placed on top of the downstream/ downslope P. This overlap should be anchored at foot spacing across the P. hen i nstal I i ng multi pl e wi dth mats heat seamed i n the factory,al I factory seams and field overlaps should be similarly anchored. Rev.6/06 6.17. DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE M Fi ure 6.17 Temporary Channel Liners; Washington State Department of Ecology Excavate channel to design Overlap 6" min. grade and cross-section r Design depth Longitudinal anchor trench Overcut channel 2"to allow bulkin r I Ali during seedbed preparation 6 J Typical installation with erosion control blankets or turf reinforcement mats 6„ 6;, Intermittent check slot Longitudinal anchor trench Shingle-lap spliced ends or begin new roll in an intermittent check slot Prepare soil and apply seed befor installing blankets, mats or oth temporary channel liner sys 3 0 NOTES: 1. Design velocities exceeding 2 ft/sec require temporary blankets, mats or similar liners to protect seed and soil until vegetation becomes established. 2. Grass-lined channels with design velocities exceeding 6 ft/sec should include turf reinforcement mats 6.17.10 Rev.6/06 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications Fi ure 6.17e Channel Installation and Slope Installation; Washington State Ecology Department Longitudinal anchor Terminal slope and trench iL channel anchor trench 6" Stake at T-5' l intervals . . 41 _ 0 ry � ra 1'a ru b° - r° slot at 25' r° intervals rb � Initial channel Intermittent anchor trench check slot NOTE: 1. Check slots to be constructed per manufacturers specifications. 2. Staking or stapling layout per manufacturers specifications. Slope surface shall be smooth before If there is a berm at the top of placement for proper soil contact. slope,anchor upslope of the berm. Stapling pattern as Min. 2" " 1 Anchor in 6"x6" min. Trench per manufacturers overlap r� f • and staple at 12" intervals. recommendations. Min. 6"overlap. Staple overlaps max. 5"spacing. tight-allow Bring material down to a level area, Do not stretch blankets/matting g turn the end under 4 and staple at 12 the rolls to conform to any irregularities. intervals. For slopes less than 3H:iV, rolls Lime,fertilize,and seed before installation. Planting may be placed in horizontal strips. of shrubs,trees,etc. should occur after installation. Rev.6/06 6.17.11 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE B Maintenance 1. nspect of I ed rosi on ontrol Products at I east wee I y and after each significant(1/2 inch or greater)rain fall event repair immediately. ood contact with the ground must be mai ntai ned, and erosi on must not occur beneath the P. 3. ny areas of the Pthat are damaged or not in close contact with the ground shal I be repai red and stapl ed. . f erosi on occurs due to poorl y control I ed drai nage,the probl em shal I be fixed and the eroded area protected. oni for and repair the P as necessary until ground cover is establ i shed. References prague, . oel. T / nvironmental, nc. " reen ngineering, esign pri nci pl es and appl i cati ons usi ng rol I ed erosi on control products" torm ater anagement anual for estern ashi ngton, ashi ngton tale epartment of col ogy, ater ual i ty Program http://www.ecy.wa.gov/programs/wq/stormwater/index.html rosion ontrol Technology ouncil, http://www.ectc.org 6.17.1 Rev.6/07 DocuSign Envelope ID: E39A7 F34-1 956-4 F98-91 AB-12 1 A68293 FOE Attachment D - RollMax BioNet SC150BN Specs *Contractor shall utilize RollMax BioNet SC15013N or approved equal for Lake Orange erosion control blanketing 1 ROLLMAKM (� ROLLED EROSION CONTROL '1 Specification Sheet - BioNet° SC150BNTM Erosion Control Blanket DESCRIPTION Index Property Test Method Typical The extended-term double net erosion control blanket shall be a 0.25 in. Thickness ASTM D6525 machine-produced mat of 70%agricultural straw and 30%coconut (6.35 mm) fiber with a functional longevity of up to 18 months.(NOTE:functional Resiliency ECTC Guidelines 86% longevity may vary depending upon climatic conditions,soil,geograph- Water Absorbency ASTM D1117 311% ical location,and elevation).The blanket shall be of consistent Mass/Unit Area ASTM D6475 8.32 oz/sy thickness with the straw and coconut evenly distributed over the (282.9 g/sm) entire area of the mat.The blanket shall be covered on the top and Swell ECTC Guidelines 46% bottom sides with a 100%biodegradable woven natural organic fiber Smolder Resistance ECTC Guidelines Yes netting.The netting shall consist of machine directional strands Stiffness ASTM D1388 0.42 oz-in formed from two intertwined yarns with cross directional strands Light Penetration ASTM D6567 7.6% interwoven through the twisted machine strands(commonly referred 201.6 Ibs/ft to as Leno weave)to form an approximate 0.50 x 1.0 in.(1.27 x 2.54 Tensile Strength-MD ASTM 06818 (2.99 kN/m) cm)mesh.The blanket shall be sewn together on 1.50 inch(3.81 cm) Elongation- MD ASTM D6818 13.4% centers with degradable thread.The blanket shall be manufactured 164.4lbs/ft with a colored thread stitched along both outer edges(approximately Tensile Strength-TD ASTM D6818 (2.44 kN/m) 2-5 inches[5-12.5 cm]from the edge)as an overlap guide for adjacent Elongation-TD ASTM D6818 14.2% mats. Biomass Improvement ASTM D7322 641 The SC15013N shall meet Type 3.13 specification requirements estab- lished by the Erosion Control Technology Council(ECTC)and Federal LPermissible Highway Administration's(FHWA) FP-03 Section 713.17 Unvegetated Shear Stress 2.10 psf(100 Pa) Material Content Unvegetated Velocity 8.00 fps(2.44 ri 70%Straw Fiber 0.35 Ibs/sq yd ir Matrix (0.19 kg/sm) Slope Design Data: 30%Coconut Fiber 0.15 Ibs/sq yd(0.08 kg/sm) Slope Gradients(S) Top:Leno woven 100% 9.3S Ib/1000 sq ft Slope Length(L) <_3:1 3:1-2:1 >2:1 Netting biodegradable jute (4.5 kg/100 sm) Bottom:100%biodegradable 7.7lb/1000 sq ft 20 ft(6 m) 0.001 0.029 0.063 /o organic jute (3.76 kg/100 sm) 20-50 ft 0.051 0.055 0.092 Thread Biodegradable >-50 ft(15.2 m) 0.10 0.080 0.120 Standard Rail Sizes Roughness Coefficients- Unveg. Width 6.67 ft(2.03 m) 8.0 ft(2.4 m) 15.5 ft(4.72 m) Flow Depth Manning's n J Length 108 ft(32.92 m) 112 ft(34.14 m) 90 ft(27.43 m) <0.50 ft(0.15 m) 0.0S0 Weight±10% S2.22 Ibs(23.69 kg) 65.28 Ibs(29.61 kg) 101.2 Ibs(45.9 kg) 0.50-2.0 ft 0.050-0.018 Area 80 sq yd(66.9 sm) 100 sq yd 155 sq yd >_2.0 ft(0.60 m) 0.018 (83.61 sm) (129.6 sm) Leno weave Leno top and Leno top and top only bottom bottom ©2017,North American Green is a registered trademark.Certain products and/or applications North American Green described or illustrated herein are protected under one or more U.S.patents.Other U.S. NORTH 5401 St.Wendel-Cynthiana Road patents are pending,and certain foreign patents and patent applications may also exist. AM E R I CAN Poseyville,Indiana 47633 Trademark rightsor material apply the indicatedsont heremplat Final an determination ma n erof of use,i suitability hsole of any information or material for the use contemplated,and its manner of use,is the sole responsibility of the user.Printed in the U.S.A. GREEN' g 0 772 2040 EC RMX MPDS BSC150BN 6.13 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Attachment E - NCDEQ Permanent Seeding Specs Practice Standards and Specifications 6.11 PS Definition ontrol I i ng runoff and erosion on disturbed areas by establishing perennial vegetative cover with seed. To reduce erosion and decrease sediment yield from disturbed areas, to permanentl y stabi I i e such areas i n a manner that i s economi cal,adapts to si to conditions,and al I ows sel ecti on of the most appropriate plant mated as. i ne graded areas on whi ch permanent, I ong I i ved vegetati ve cover i s the most practical or most effective method of stabi I i i ng the soi I. Permanent seedi ng may a1 so be used on rough graded areas that wi I I not be brought to final grade for a year or more. reas to be stabi I i ed with permanent vegetation must be seeded or pl anted within 15 working days or 90 calendar days after final grade is reached,unless temporary stabi I i ati on i s appl i ed. uri ng the ni ti al phaseof a1 I I and di sturbi ng pro ects,the protecti veI aver,ei ther natural or man made, is removed from the earth s surface. s the protective layer is removed, the resulting bare areas are exposed to the natural forces of red nfal 1, f ree i ng, thawi ng, and wi nd. The resin t i s soi I erosi on that I eads to sedi ment pot I uti on of orth arol i na streams, ri vers, I a es, and estuari es. Thisdesignmanual presents many al ternati ve strategi es for preventi ng erosi on and reducing sediment loss during the construction process. stabl i shment of protective vegetative cover during the construction pro ect, however, is the crucial step in achieving soil stabi I i ati on, control I i ng soil erosion, and preventing sedimentation of waterways.Without a sufficient amount of root mat and I eaf cover to protect and hol d the soi I i n pl ace,I arge vol umes of soi I wi I I be I ost and waterwayswi I I bedegraded I ong after pro ectsareconsi dered compl ete. ecti ons of this practice standard address many of these various situations and set forth selection criteria for the appropriate cover based on purpose and adaptabi I i ty. ome sediment and erosion control practices recommended in earlier editions of the manual may no longer be applicable. For example,many popular and commonly used seed and plant varieties have been identified as invasive. Invasive plants are defined as species that aggressively compete with, and displace, locally adapted native plant communities. n select cases where no practical alternative i s avai I abl e,these plants maybe considered on a I i mi ted basi s f or soi I stabi I i ati on,understandi ng that the goal i s to el i mi nate the use of all invasive plants in favor of non-invasive native and/or introduced speci esthat wi I 1 provide an equal I y ac ceptabl a vegetati ve cover. here there i s no al ternati ve to the use of i nvasi ve species,measures need to be i ncorporated in the i nstal I ati on and maintenance of these plants to limit their impacts. Rev. /0 6.11.1 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE t i si mperati vethat disturbed soi I sbetotal I y protected f rom erosi on and sediment I oss duri ng constructi on and before a pro ect i s consi dered compl ete and acceptable. nstal I i ng appropri atevegetati on i n an i mmedi ateand ti mel y fashi on is the optimal means of achieving this stabilization. Vegetative specifications for most exposed soil conditions across North Carolina are provided in this section of the manual. t should be noted however,that no two sites i n the tale are exactly alike;therefore the protective vegetative cover for individual sites shoul d be caret ul I y sel ected. ach requi res i is own i nvesti gati on, and ysi s, design and vegetative prescription as set forth in this section of the manual. This practice standard describes three stages of vegetative cover immediate, primary and longterm. ff ecti ve and acceptable stabi I i ati on can be provided onl y when the opti mum combi nati on of i mmedi ate, pri mary, and I ong term vegetative practi ces are appl i ed. The vegetati ve measures presented i n thi s chapter i ncl ude appl i cati on of seed, sod and sprigs. Use of field and container grown plants are not addressed i n thi s manual. R anti ng of these types of vegetati on i s typi cal I y at spaci ng and intervals that will not provide the required protective cover. owever, the design professional is encouraged to uti I i e these larger plants to compliment the required protective cover, particularly where these types of pl ants wi I I provi de seed for Conti nued I ong term cover and wi I dl i fe habitat. PLANNING CONSIDERATIONS SOILS Test and analyze the type(s)and quality of the existing soils on a site,their pH ranges, and thei r nutri ent I evel s. Ta i ng soi I sampl es from the different areas of the pro ect si to and havi ng them tested at a state or i ndependent I ab wi I I provide a baseline for determining the pH modifiers and additional nutrients requi red for the sel ected pl ant vari eti es. isturbed conditions on a site may produce a variety of soil communities. utrient and p levels in deeply cut soils will be quite different from those soils found on the original surface. hen sites are highly disturbed through mechanical means such as grading,the soils become mixed together in many different ratios. These areas should be identified and tested. esul is f rom soil tests wi I I usual I y i ncl ude recommended application rates of soil modifiers such as lime and fertilizer for the selected plant species in the parti cul ar soi I s. ppl i cati on rates wi I I be i temi ed i n the report. The texture of the soil on a site,which is the proportion of sand,silt,and clay i n the soi 1, i s an i mportant physi cal i ndi cator of the si to s abi I i ty to support vegetation. n heavy clay soi I s amendments maybe necessary to provide an adequately drained planting medium. Conversely, in extremely sandy soils, amendments may be required to provide for moisture and nutrient retention. 6.11. Rev. /0 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications Soil tests will indicate the texture of the given soil but will not provide recommendations for amendments that will improve the soil texture. Generally, the addition of organic materials will improve the porosity of heavy clay soi I s and improve the water holding capacity of extremely sandy soils. On sites where these different soil conditions exist, it is recommended that a design professional with experience in soil modification be employed to recommend the proper amendments. or more information visit the gronomic ervices oil Testing web page http://www.agr.state.nc.us/agronomic/sthome.htm SOIL PREPARATION Proper soil preparation is necessary for successful seed germination and root establ i shment. t i s al so necessary for establ i shment of rooted spri gs, sod and woody plants. eavi I y compacted soi I s prevent air, nutrients and moisture from reaching rootsthereby retarding or preventing plant growth. The success of site stabili ation and reduction of future maintenance are dependent on an adequatel y prepared soi I bed. of I owi ng are the requi rements for preparati on of areas to be vegetated by grassing, sprigging, sodding, and/or planting of woody pl ants: General Requirements: • Preparation for primary/permanent stabilization shall not begin until all construction and utility wor within the preparation area is complete. owever, it may be necessary to prepare for nurse crops prior to compl eti on of constructi on and i nstal I ati on of uti I i ti es. • A North Carolina Department of Agriculture Soils Test (or equal) shall be obtained for all areas to be seeded, sprigged, sodded or planted. eecmmended ferti I i er and p ad usti ng products shad I be i ncorporated into the prepared areas and backfill material per the test. • All areas to be seeded or planted shall be tilled or ripped to a depth specified on the approved plans, construction sequence and/or construction bid list. Ripping consists of creating fissures in a criss-cross pattern over the enti re surface area, uti I i i ng an i mpl ement that wi I I not gl a e the si de walls of the fissures. Site preparation that does not comply with these documents shad I not be acceptabl e. The depth of soi I preparati on may be establ i shed as a range based on the approval of the revi ewi ng state or local agency. Once tilled or ripped according to the approved plan, all areas are to be returned to the approved final grade. pH modifiers and/or other soil amendments specified in the soil tests can be added during the soi I preparati on procedure or as descri bed bel ow. • All stones larger than three(3)inches on any side,sticks,roots,and other extraneous materials that surface during the bed preparation shall be removed. Rev. i0 6.11.3 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Areas to be Seeded: • Till or disc the prepared areas to be seeded to a minimum depth of four (4)inches.Remove stones larger than three(3)inches on any side,sticks, roots and other extraneous materials that surface. If not incorporated during the soil preparation process,add pH modifier and fertilizers at the rate specified in the soil test report. • Re-compact the area utilizing a cultipacker roller.The finished grade shall be a smooth even soil surface with a loose, uniformly fine texture. All ridges and depressions shall be removed and filled to provide the approved surface drai nage. eedi ng of graded areas i s to be done immediately after finished grades are obtained and seedbed preparation is completed. Areas to be Sprigged,Sodded,and/or Planted: • At the time of planting till or disc the prepared areas to a depth of four(4) to six (6) inches below the approved finished grade. Remove all stones larger than three(3)inches on any side,sticks,roots and other extraneous mated al s that surface. f not i ncorporated i n the ri ppi ng process, add p modifier,fertilizer,and other recommended soil amendments. • Re-compact the area utilizing a cultipacker roller and prepare final grades as described above. nstal I sprigs,sod and pl ants as di rected i mmedi atel y after fine grading is complete. Mulch,mat and/or tack as specified. VEGETATION vai I abi I i ty of seed and plant materials is an important consideration of any construction stabi I i ati on effort. Throughout orth arol i na, cl i mate, economi cs, constructi on schedul e del ays and accel erati ons, and other factors present difficult challenges in specifying the different vegetation needed for si to stabi I i ati on. To help resolve this issue, vegetative stabi I i ati on requires consi derati on i n three categori es: ■ Immediate Stabilization—nurse crop varieties(Note: temporary mulching may be uti I i ed for i mmedi ate stabi I i ati on i f outl i ned on the approved plans and construction sequence.) ■ Primary Stabilization—plant varieties providing cover up to 3 years with a specified maintenance program ■ Long Term Stabilization—plant varieties providing protective cover with mai ntenance I evel s sel ected by the owner n adequate ob i n one of these areas does not guarantee success i n the I ater phases. orti cul turd mai ntenance must be i nd uded i n the pl ans. mmedi ate vegetative cover will always require additional fertiIi ati on, soil amendments, soil tests, overseeding and/or other horticultural maintenance unti I pri many vegetati ve cover i s establ i shed. 6.11. Rev. /0 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications here provi si ons are made for regular maintenance, primary vegetative cover may be the end result. An example of primary vegetative cover being acceptable as an end use would be lawns in residential and commercial devel opments that are establ i shed, moni tored and compl i mented wi th regul ar and approved horticultural maintenance practices. (See Example 6.1 La.) n pro ects where continual maintenance will not be provided or scheduled fol I owi ng the pri mary stabi I i ati on of a pro ect, I ong term stabi I i ati on wi I I be necessary. ai ntenance of initial and long term stabi I i ati on can cease only after the long term cover has establ i shed and hardened to local cl i mati c conditions. ai ntenance of long term vegetation must be included in the project construction sequence and on the approved plans. Examples of areas suitable for long term vegetation include roadsides, reforestation areas, restored flood plains,restored riparian areas, phased closing of landfills, and mi ni ng red amati ons. ompl ete stabi I i ati on requi res usi ng at I east two, and most ti mes, al I three vegetative phases.The design professional must clearly communicatethispoint in their specifications, construction sequence, and in direct communications to owners and installers. The charts in tables 6.11.a through 6.11 A provide information to assist the design professional in thi s tas . The tabl es are not inclusive and are presented only as alternatives. The professional is expected and required to provide design and specifications that combine the information i n the manual with nowt edge of the particular sites and their constraints. H AND NUTRIENT AMENDMENTS etermi ni ng the nutrients that enable seed and container plants to grow, flourish, and become established after planting are critical elements of the design and stabi I i ati on process. The soi I s tests previously described will provide a recipe for amendments based on particular plants and particular soils. The test results will recommend the amounts of base elements(nitrogen, phosphorous,potassium),pH modifiers and other trace elements that should to be added to the soi I for sel ected sped es of seeds and pl ants. The acidibase characteristic of the soil is a primary component of soil fertility. f the soi I aci dity i s not i n the proper range,other nutri ents wi I I be i neffecti ve, resulting in less productive plant growth. ost pl ants grow best i n a p range of 6.5 — 7.0 (slightly acidic to neutral). The soil tests will recommend the specific amendments and application rates required to achieve this range. These amendments must be incorporated into the soil (not applied on the surface) to be effective. (See the General Requirements for soil preparation specifications and timing for incorporation of soil amendments.) The base elements are easily found in but quantities. ime can also be obtai ned i n I arge quanti ti es. They al I must be thoroughl y i ncorporated i nto the soil through appropriate mechanical means. round surface appl i cati ons without proper soil mixing will result in poor results. n addi ti on to the base ferti I i ers, other trace d ements are needed to produce healthy and vigorous growth.These include but may not be limited to sulfur, manganese, i nc, boron, chl on ne and molybdenum. f not a1 ready i ncl uded with bulk mixes of the base elements,they can be obtained from commercial suppl i ers. Rev. /0 6.11. DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Provisions for soils test during and/or after initial grading is complete shall be i ncl uded on the approved pl an, i n the approved constructi on sequence,and on the bi d i tern I i st uti I i ed for the pro ect. If you did not obtain a soil test: Follow these recommendations for all grasses except centipedegrass. . ppl y pounds of ground I i mestone per , sq.ft. 2.Apply a starter type fertilizer(one that is high in phosphorus)based on the type of grass and pl anti ng method. erti I i er bags have a three number system indicating the primary nutrients, such as 8-8-8 or 5-10-10. These numbers denote the P rati o the percentage of each nutri ent i n a ferti I i er. The percentages are al ways noted i n the fol I owi ng order: itrogen for green color and growth. P O Phosphorus for good establ i shment and rooti ng. O Potassium to enhance pest and environmental stress tolerance. Some common examples of starter type fertilizers required for a 1,000 sq. ft. area include 40 pounds of 5-10-10, 20 pounds of 10-20-20, or 16 pounds of 18-24-6. For sandy soils, typical to coastal plain and sandhills of North arol i na,ferti I i er rates shoul d be i ncreased by percent. here avai I abl e, it is recommended that the design professional specify organic compounds that meet the ferti I i ati on requirements, p and other element requirements. nitial studies have indicated that these compounds have a more positive effect on the environment than some of the synthetic compounds used to manufacture inorganic fertili ers. These materials are readi I y avai I abl e i n the commerci al trade as wel I as found i n recycl ed yard waste debri s, sewerage sl udge, I i me stabi I i ed sl udge and ani mat manures. Materials proposed for use must be industry certified and/or privately tested and certified to be acceptable for proposed areas of use and application prior to approval. MULCHES AND TACKING AGENTS ul ches and tac i ng agents may be requi red or necessary to protect a seedbed s disturbed surface until the seed can germinate and provide the required protection from erosion. el ecti on of the materi al s used i n thi s appl i cati on shoul d be based on thei r abi I i ty to hol d moi sture i n the soi 1, as wel I as protect exposed soil from rainfall, storm water runoff, and wind. The availability of the sel ected mated al and the means to apply it are cri ti cal factors to consi der when pl anni ng for the stabi I i ati on of any di sturbed area. The mul ch must cover a minimum of eighty(80)percent of the soil surface and must be secured by a tac i ng agent,cri mpi ng,or protecti ve bi odegradabl a netti ng. etti ng that incorporates plastic mesh and/or plastic twine should not be used in wetlands, riparian buffers or floodplains due to the potential of small animal mortality. See Section 6.14 for detailed specifications and product applications. SOIL BLANKETS of I bl an ets can be an acceptabl a and effecti ve method of temporary sedi ment and erosion control in lieu of nurse crops. See Section 6.17 of the manual for descriptions of this product and how it can be used in con unction with this section. n absence of mulches and trac i ng agents other means of protection may be necessary and required. 6.11.6 Rev. t0 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications PROTECTIVE MATTING Protective matting consists of an i mpervi ous cover secured to the soil surface in I i eu of vegetative cover. t is used to protect and stabi I i e the surface where the process of seedi ng or pl anti ng forms of vegetation may cause more erosi on and off si to sedi mentati on than appl i cati on of the mat. t i s a1 so used where a disturbed area is intended to lay fallow for a period of time before additional constructi on or I and di sturbance to es pl ace. f a pervi ous matti ng i s sell ected, a combination of vegetation and matting is required. eeds can be appl i ed prior to i nstal I ati on of the matting only after proper seedbed preparation has been provided. Iso, live sta es, dormant sprigs, and other vegetation forms can be inserted in the pervious matting once it has been i nstal I ed. Pre seeded pervious matting may be used for quic er root establishment and stabilization only if certified dating and germination guarantees are provided. The reviewing agency must approve all pre seeded matting on site prior to installation. Matting that incorporates plastic mesh and/or plastic twine should not be used in wetlands, riparian buffers or floodplains due to the potential of small animal mortality. See Section 6.17 for detailed specifications and recommended product applications. STABILIZATION IN WETLANDS, RIPARIAN BUFFERS, AND FLOODPLAINS and disturbing activity involving streams, wetlands or other waterbodies may also require permitting by the . . rmy orps of ngi neers or the . . i vi si on of ater ud i ty. pproval of an erosion and sedimentation control pl an i s condi ti oned upon the appl i cant s compl i ance wi th federal and tate water quality laws, regulations,and rules. dditi onal I y, a draft plan should be disapproved if implementation of the plan would result in aviolation of rules adopted by the nvironmental anagement ommission to protect riparian buffers along surface waters. are should be to en in selecting vegetative stabi I i ati on of wetlands and riparian buffers to comply with permitting requirements of other agencies,as wel I as provide adequate ground cover. Planning Considerations for Land Disturbing Activities Within Wetland, Riparian,and Floodplain Areas Wetlands,riparian areas,floodplains, and/or terrestrial areas between streams and uplands, serve to buffer surface water and provide habitat for aquatic and terrestrial flora and fauna. When cleared and disturbed, these sensitive areas are difficult to protect. Because of their proximity to water courses,relatively high ground water tables,and flooding potential,detailed analysis and design is necessary to determine the appropriate erosion control measures during construction. Determining the appropriate and most expeditious means of permanent vegetative stabi I i ati on in these areas requires equal I y detai I ed and ysi s and desi gn. The f of I owi ng condi derati ons for erosi on control and stabi I i ati on shoul d be to en i nto account duri ng the desi gn phase of the I and di sturbi ng pro ect where sensitive areas are i nvolved: • Obtain soil tests to determine the soil type, pH, texture and available nutri ents. • Based on the soil tests provide a schedule of nutrients and other soil amendments that wi I I be requi red. Rev. /0 6.11.7 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE • Select a seeding mix of non-invasive species that will provide immediate stabilization(a short-term environment that will support and compliment permanent vegetative stabi I i ati on) and include a selective ve native species mix that will eventually provide a permanent cover(a long-term environment that,with minimal maintenance,will provide adequate root and leaf cover). • Invasive species are to be avoided. If native species and introduced non- i nvasi ve seed sources are not avai I abl e, protective matting that will hold and foster the development of native cover from ad acent seed sources should be used. onti nuous mai ntenance must be empl oyed unti I the sel ected sped es have matured and are no I onger suscepti bl e to competi ti on f rom i nvasi ve pl ants. f no J ternati ve to the use of i nvasi ve seeds and pl ants i s avai I abl e, i nvasi ves approved on the pl ans may be uti I i ed onl y wi th stri ct contai nment measures outl i ned i n detai I on the pl ans, i n the construction sequence and in the maintenance specifications. • Aquickly germinating nurse crop ofnon-invasive,non-competitive annual grass species can be used along with native seeding and/or matting. These temporary systems should be pl anted at mi ni mal density so that they do not i nhi bit the growth and establ i shment of the permanent,native species. (See the plant chart in Table 6.1 La for recommended native and nurse crop species.) • Seed bed preparation is key to successful establishment of seeds. Particular care shoul d be to en, however,when wor i ng i n wetl ands, ri pari an areas, or floodplains due to their sensitive nature. Careful consideration should be gi ven to the types and pl acement of I arge equi pment wor i ng i n these areas. Thi s process must be outl i ned i n detai I on the pl an s constructi on sequence. • Installation techniques vary and should be planned for accordingly. • A maintenance plan must be established for optimal plant establishment, submi tted wi th the pl ans and i ncl uded i n the bi d I i st for the pro ect. Like all construction sites,wetlands,riparian areas, and floodplains will vary wi del y i n physi cal ma eup across orth arol i na. i fferent condi ti ons wi I I dictate specific treatment, design and plant selection within the Mountains, Pi edmont, and oastal PI ai n regions. oil tests, seedbed preparation, mulching, matting, and maintenancewill be critical for successful vegetative establishment and long term protection of these envi ronmental I y sensitive areas. navoidable impacts to these areas during land disturbing activities need to be addressed i n detai I on the plan sheets and construction sequence. 6.11. Rev. /0 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications Native Seed and Plant Selection for Stabilization of Wetlands, Riparian Areas,and Floodplains pon the completion of the land disturbing activity, vegetative cover must be establ i shed on al I areas not stabi I i ed by other means. f wor i n these areas stops for more than 15 working days, temporary vegetative cover and/ or matting must be applied to all disturbed areas. The goal is to protect these areasfrom erosion and to prevent sedimentation of ad acent streams,wetlands, la es,and other water bodies. Planning considerations for wetlands, riparian areas and floodplains will require additional research, detail and specifications. Native grasses are usually required as a condition of a 401 Water Quality Certification or a trout buffer vari ance. ati ve vegetati ve sped es are pl ant sped es that natural I y occur i n the regi on i n whi ch they evol ved. These pl ants are adapted to I oval soi I types and cl i mati c vari ati ons. ecause most nati ve sped es do not germi nate and establ i sh as readi I y as some introduced species, it is necessary to provide a non native nurse crop or matting to stabi I i e the soi I unti I the native crop can become established as the dominant cover. Once established, the native plants will produce an extensive root structure that,if properly maintained,will stabilize soils and reduce erosive forces of rainfall and overland stormwater flow. Many of these pl ants al so possess characteri sti cs that,when establ i shed,al I ow them not only to survive, but also to thrive under local conditions. Seeding a mixture of perennial native grasses, rushes, and sedges is a way to establish permanent ground cover within wetlands, riparian areas and floodplains. The use of propagated plants is another method of reestablishing natives in these environments. Selecting a seed mixture and/or propagated plants of different species with complimentary characteristics will provide vegetation to fill select niches on sites with varying physical conditions. The design professional should note that because most native species do not germinate and establish as readi I y as some introduced species, it is necessary to provi de a non nati ve nurse crop or matti ng to stabi I i e the Soi I unti I the native crop can become establ i shed as the dominant cover. or additional information about acceptable nurse crop varieties, consult the pl anti ng I i st in Appendix 8.02,local seed and plant suppliers,the North Carolina Cooperative Extension Service or a qualified design professional to assure the proper selection and plant mix. Rev. /0 6.11. DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Permanent native seed species within the seed mixture should be selected based on natural occurrence of each species i n the pro ect site area. I i mate, soi I s,topography,and aspect are ma or factors affecti ng the sui tabi I i ty of pl ants for a particular site and these factors vary widely across orth arolina,with the most significant contrasts occurring among the three major physiographic regions of the state—Mountains, Piedmont, and Coastal Plain. Sub-regions of the state should also be considered. For example,the Triassic Basin in the Piedmont region may have characteristics that call for special soi I treatment, I i mi ted plant selection, and special maintenance. ven within the riparian area, there may be need for different species depending on site conditions (i.e., dry sandy alluvial floodplains with wet pockets). Therefore, thoughtful pl anni ng i s requi red when sell ecti ng sped es for i ndi vi dual si tes i n order to maximize successful vegetation establishment. Native seed and plant species are included on the plant list in Appendix 8.02 of this manual. The design professional should note that regardless of the benefits and advantages of native seeds and plants, there are potential issues if proper pl anni ng, i nstal I ati on and mai ntenance do not occur. These may i ncl ude: • Potential for erosion or washout during the establishment stage; • Seasonal limitation on suitable seeding dates and availability of seed and pl ants • Adaptability of species at specific sites; • Availability of water and appropriate temperatures during germination and early growth and • Lack of maintenance to control invasive plants and undesirable competition. PLANTING • ee —Prepare the seed bed as described above in soil preparation. Apply seed at rates specified on the plans, and/or as recommended in Tables 6.11 a-c of this manual, with a cyclone seeder, prop type spreader, drill, or hydroseeder on and/or into the prepared bed. Incorporate the seed into the seed bed as specified. Provide finished grades as specified on the approved pl an and caref ul I y cul ti pac the seedbed as terrai n al I ows. f terrai n does not al I ow for the use of a cul ti pac er, the approved pl ans and construction sequence must provide an alternative method of lightly compacti ng the soi 1. ul ch i mmedi atel y. • —Install onto the prepared seed bed per the most current guidance in Carolina Lawns,NCSU Extension BulletinAG-69,or Practice 6.12 Sodding. 6.11.10 Rev. /0 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications • Woody plants (liners, container, B&B)—These materials are typically used to complement an herbaceous protective cover. They eventually are ma or components of I ong term, permanent stabi I i ati on and shoul d be chosen and planned in con unction with immediate and long term maintenance. The plants should be selected and specified by the design professional for each individual project. See Practice 6.13 Tees Shr bs Vines, and Ground Covers. MAINTENANCE The absence of or an incomplete landscape management specification and/ or compl ete mad ntenance schedul e shad I consti tute grounds for di sapproval of the pl ans. Proper mad ntenance i s criti cal for the Conti nued stabi I i ati on once vegetati ve cover i s establ i shed. I though mad ntenance strategi es for different si tes may be si mi I ar, no two constructi on si tes i n orth arol i na have been or will be able to be controlled or protected in identical ways. Variations in cl i mate,topography,soi I s,avail I abl a moisture,si a and many other conditions wi I I di ctate the mad ntenance methodol ogy to be used. detai I ed schedule of mad ntenance wi I I be requi red on the pl ans. Thi s schedul a wi I I i I I ustrate how the i ni ti al pl anti ng wi I I be mai ntai ned to assure i mmedi ate, short term and permanent protection. The schedule will address topics such as appropriate i rri gati on of pl ants duri ng the earl y establ i shment phase, drought conditi ons, excessive rainfall, mulch replacement, supplemental seeding, supplemental soi I s tests, application of nutrients and amendments, control of competitive and i nvasi ve sped es, di sease and i nsect control, and correcti ve mad ntenance, measures to address fai I ure of vegetati on to become establ i shed. ontractual respond bi I i ty for mad ntenance after i ni ti al establ i shment of vegetati ve cover wi I I be provi ded on the pl ans, i n the constructi on sequence and on the bi d I i st for the project. Maintenance bonds and/or warranty guarantee may be required of the respond bl e party,especi a1 I y for areas i n or ad acent to envi ronmental I y sensitive sites such as wetlands, riparian buffers, floodplains, and waters of the State. See Example 6.11a for a sample maintenance specification and a mi ni mum mai ntenance chec I i st that shad I be provi ded on a1 I pl ans. RECOMMENDED BID LIST (These items should be itemized on documents utilized to obtain pricing for pl anti ng pertai ni ng to vegetati ve stabi I i ati on of I and di sturbi ng pro ects i n orth arol i na.) • Soil test prior to grading(price per each test). • Soil test during grading operations(price per each test). • Soil test at completion of grading and/or prior to seeding, sprigging, sodding and application of ferti I i er, I i me, and other soil amendments (price per each test). • Ripping/subsoiling to a depth of six(6) inches. (Provide an alternate for ripping to a depth greater than six(6)inches.) (price per acre) • Tilling/discing ripped area to a depth of four(4)inches and re-compacting with a cultipacker roller(include in seeding price). Rev. /0 6.11.11 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE • Seeding(price per square foot). • Mulching(price per square foot). • Repair seeding(price per square foot). • Repair mulching(price per square foot). • Matting(price per square yard). • Watering(price per thousand gallons). • Mowing(price per square foot). SEEDING RECOMMENDATIONS The following tables list herbaceous plants recommended for use as nurse crops for i mmedi ate stabi I i ati on and primary crops for initial and long term stabilization. Nurse crops are expected to develop in two to five weeks and, with adequate maintenance, be an effective method of soil stabili ation for a period of six months to one year. Nurse crops are not effective as primary long term cover, however if properly maintained they can be an adequate cover and protecti on for the devel opment of pri mary crops. The goal for a primary crop i s for it to develop over a three wee to one year period and be effective up to three years with a well-defined maintenance program. The long term goal for a primary crop is the initial step toward a sustainable protective cover without the need of maintenance. here the pri mary crop is i ntended for a managed lawn and landscape aesthetics, the effective period can be extended by a more intense maintenance program. here native species are uti I i ed and become establ i shed during the planned mad ntenance program, a permanent cover that wi I I support future successi on species should exist and require little or no additional maintenance or management. n uses of both nurse and pri mary crops,the devel opment peri ods I i sted on the tables are optimal based on normal climatic conditions for the pl anti ng dates I i sted. The sedi ment and erosi on control mad ntenance program must recogni e that optimum temperatures and rainfall are the exception rather than the rule. The design professional needs to provide flexibility in the stabilization plan to address the potential ranges of temperature and moisture conditions we experience in North Carolina. 6.11.1 Rev. /0 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications nformati on i s provi ded for seedi ng rates,opti mum pl anti ng dates i n the state s three regi ons, sun and shade tol erance, i nvasi ve characteri sti cs, compati bi I i ty i n wetl ands and ri pari an buffers, and i nstal I ati on mai ntenance consi derati ons. y goi ng through the I i sts the desi gn prof essi and can sel ect the nurse and pri mary seed vari eti es and mad ntenance characteri sti cs they fed are best sui ted for their site conditions, vegetation management expertise and maintenance capabi I i ti es. To use the i nformati on i n the seedi ng charts the pl an preparer must: • Determine what nurse crop best fits their site, soil conditions, and permanent seed mix. • Obtain soil tests for all areas to be seeded. • Know the site's region: mountains,piedmont,or coastal plain. • Know if the areas to be seeded are sunny,part shade,or full shade. • Know if the areas are well or poorly drained. • Know if wetlands or riparian buffers are included in the areas to be seeded. • Know if a chosen crop is invasive and if so,what potential impacts it will have on the si to and ad acent properties. i th thi s nowl edge the pl an preparati on may proceed uti I i i ng the charts provided to provide the several seed mixes that will be applicable to the different areas requiring stabi I i ati on. Rev. i0 6.11.13 0 0 0 c Cn m' m 0') HERBACEOUS PLANTS-Seeding recommendations for immediate stabilization/nurse crops o (2 to 5 weeks for development; effectiveness goal: 6 months to 1 year stabilization) Table 6.11.a m 1 NURSE CROP SPECIES m Optimal Planting Dates C4 Fertilization/ v Native/ Seeding Rates limestone coastal Sun/Shade Riparian Invasive Installation/Maintenance -n Common Name Botanical Name Introduced lbs/acre lbs/acre Mountains Piedmont Plains tolerant Wetlands Buffers Yes or No Considerations Other information,commentary A Rye Grain Secale cerea/e 1 40 lbs By soil test 11/1-4/30 8/15-4115 8/15-4/15 Sun Yes Yes No Must be mown to reduce competitiveness with permanent or long term rn vegetation � W Wheat Triticum aestivum 1 30 Ibs By soil test 11/1-4/30 8/15-5115 8/15-4/15 Sun Yes Yes No Must be mown to reduce Not water tolerant. May be used competitiveness with in wetlands that are not D permanent or long term continuously saturated. W vegetation N German Millet Setaria italica 1 10 lbs By soil test 5/11-9/30 5/15-8/15 4/15-8115 Sun Yes Yes No Crop should be cut/disc Not water tolerant. May be used rn prior to planting primaryor in wetlands that are not W N long term vegetation continuously saturated. cn T 0 Browntop Millet Urochloa ramose I 10 lbs By soil test 5/11-9/30 5/15-8/15 4/15-8/15 Sun Yes Yes No Crop should be cut/disc Not water tolerant. May be used 1T1 prior to planting primary or in wetlands that are not long term vegetation continuously saturated. Sudan grass h brids Sorghum saccharatum 1 15 lbs By soil test NR NR 4/15-8/15 Sun No No Yes Crop should be cut/disc Use only where plants and seed S.bicolorssp.Drummondi prior to planting primary or can be contained and controlled. long term vegetation Kobe Lespedeza Kummerowia striate v.kobe 1 10 lbs By soil test 5/1-9/1 5/1-9/1 5/1-9/1 Sun No No No Consult qualified Use in Coastal Plain horticulturalist or extension agent for over-seeding with primary cover Korean Lespedeza Kummerowia stipulacea 1 10 lbs By soil test 5/1-9/1 5/1-9/1 5/1-9/1 Sun No No No Consult qualified Use in Piedmont and horticulturalist or extension Mountains.May become agent for over-seeding invasive with primary cover NOTES: 1. Seeding rates are for hulled seed unless otherwise noted. 2. Fertilizer&Limestone-rates to be applied in absense of soils tests. Recommended application rate assumes significantly disturbed site soils with little or no residual value. 3. NR means Species not recommended for this region or application area. 4. Invasive designation as determined by the N.C.Exotic Pest Pant Council and N.C.Native Plant Society. 5. Sprigging is not recommended for immediate stabilization unless terrain is flat heavy mulch is applied and no other immediate stabilization method is practical. O 0 0 0 c m' m m 0 m v o HERBACEOUS PLANTS-Seeding recommendations for primary stabilization m P p planting 9 Y ongoing program) Table 6.11.b ca Successful development depends on lantin date effectiveness goal: ti mo.-3 yrs.without an on oin maintenance ro ram D NON-NATIVE SPECIES 4 Optimal Planting Dates A Broadcast Seeding Fertilization/ Botanical Name/ Native/ Rates limestone coastal Sun/Shade Riparian Invasive Installation/Maintenance F A Common Name Cultivar Introduced lbs/acre lbs/acre Mountains Piedmont Plains tolerant Wetlands Buffers Yes or No Considerations Other information,commentary TI Sericea Lespedeza Lespedeza cuneata 1 15 lbs By soil test 9/1-6/1 9/1-5/1 10/1-4/1 Sun NR NR Yes Responds well to controlled Severe Threat ono Dumont' burns Invasive species D W N_ D rn Crown Vetch Securigera varia 1 15 lbs By soil test 3/15-4/30 NR NR Sun NR NR Yes Highly competitive, Prefers neutral soils W (Coronilla varia not recommended unless W an acceptable alternative p is not available. M Centipede Grass Eremochloa ophiuroi 1 5 lbs By soil test NR Eastern 9/1-5/1 Sun NR NR No Significant maintenance Does not tolerate high traffic. 10 lbs.for road shoulders only may be required to obtain Acceptable for sodding desired cover KY 31 Tall Fescue Schedonorus phoenij I 100 lbs By soil test 8115-5/1 9/1-4/15 9/310-3/151 Sun/ NR NR Yes If utilized,it is imperative Acceptable for sodding (Festuca arundinacea) mod.Shade that maintenance includes a containment plan KY Blue Grass Poe pratensis 1 15 lbs By soil test 8/15-5/1 NR NR Sun NR NR Yes If utilized,it is imperative Prefers neutral soils,highly that maintenance includes competitive,not recommended a containment plan unless an acceptable alternative is not available. b Acceptable for sodding O h. Hard Fescue Festuca brevipila 1 15 lbs By soil test 8/1-6/1 NR NR Shade NR NR No Not recommended for Low growing,bunch grass (Festuca longifolia) slopes greater than 5% ti Bermuda Grass Cynodon dacrylon I 25 lbs By soil test NR 4/15-6/30 4/15-6/30 Sun NR NR Yes If utilized,it is imperative Extremely aggressive,not O that maintenance includes recommended and should be a containment plan avoided unless an acceptable A alternative is not available. May be sodded or sprigged rA„ A b�1 t0 n O V 0 0 0 c m' m m o 1 HERBACEOUS PLANTS-Seeding recommendations for primary stabilization m Successfull development depends on planting date(effectiveness goal: 6 mo.-3 yrs.without an ongoing maintenance program) Table 6.11.c NATIVE SPECIES gym, Optimal Planting Dates D v -n A See Table 6.11A for Fertilization/ Invasive Botanical Name/ Native/ variety limestone Coastal Sun/Shade Riparian Yes or Installation/Maintenance Other information, W Common Name Cultivar Introduced seedling rates Ibs/acre Mountains Piedmont Plains tolerant Wetlands Buffers No Considerations commentary A Switchgrass Panicum virgatum/ N A By soil test 12/1-4/15 NR NR Sun NR Nell drain No Responds well to coo Cave-in-Rock only controlled burns. Mix with • 0D 3 to 5 other seed varieties that have similar soil D W drainage adaptations. N_ Switchgrass Panicum virgatum/ A By soil test 12/1-4/15 12/1-4/1 12/14/1 Sun NR Nell drainel No Responds well to > Blackwell N only controlled burns. Mix with M W 3 to 5 other seed varieties N that have similar soil W drainage adaptations. Tp m Switchgrass Panicum virgatum/ N A By soil test 12/1-4/15 12/1-4/1 12/1-4/1 Sun NR Nell drain No Responds well to Shelter only controlled burns. Mix with 3 to 5 other seed varieties that have similar soil drainage adaptations. Switchgrass Panicum virgatum/ N A By soil test 12/1-4/15 12/1-4/1 12/1-4/1 Sun Yes Yes No Responds well to Carthage controlled burns. Mix with 3 to 5 other seed varieties that have similar soil drainage adaptations. Switchgrass Panicum virgatum/ N A By soil test 12/14/15 12/1-4/1 12/14/1 Sun No Poorly No Responds well to Kanlow drained controlled burns. Mix with 3 to 5 other seed varieties that have similar soil drainage adaptations. Switchgrass Panicum vir atum/ N A By soil test NR 12/1-5/1 1/1-5/1 Sun No Poorly No Responds well to Alamo drained controlled burns. Mix with 3 to 5 other seed varieties that have similar soil draina a adaptations. Indian grass Sorghastrumnutans/ N B By soil test 12/1-4/15 12/1-4/1 12/1-4/1 Sun NR Well No Responds well to Western coastal plainonl Rumsey drained controlled burns. Mix with 3 to 5 other seed varieties that have similar soil draina a adaptations. Indiangrass Sorghastrum nutans/ N B By soil test 12/1-4/15 12/1-4/1 1211-4/1 Sun NR Well No 1 Responds well to Western coastal plain only Osage drained controlled burns. Mix with 3 to 5 other seed varieties that have similar soil 0 drainage adaptations. 0 0 0 c m' m m 0 HERBACEOUS PLANTS-Seeding recommendations for primary stabilization `D _ Successfull development depends on planting date(effectiveness goal: 6 mo.-3 yrs.without an ongoing maintenance program) Table 6.11.c(con't) NATIVE SPECIES D Optimal Planting Dates -4 A See Table CT Invasive 6.11.d for Fertilization/ W Botanical Name/ Native/ variety limestone coastal Sun/Shade Riparian Yes or Installation/Maintenance Other information, Common Name Cultivar Introduced seedling rates Ibs/acre Mountains Piedmont Plains tolerant Wetlands Buffers No Considerations commentary TI Indiangrass Sorghastrum nutans/ N B By soil test 12/1-4/15 12/1-4/1 12114/1 Sun NR I Well No Responds well to controlled Western coastal plain only oD Cheyenne I I drained I burns.Mix with 3 to 5 other seed �R varieties that have similar soil D drainage adaptations. 00 N Indiangrass Sorghastrum nutans/ N B By soil test NR 12/1-5/1 1/1-5/1 Sun NR Well No Responds well to Only Indiangrass adaptable to D Lomenta drained controlled burns. Mix with Eastern coastal plain Zone 8 W 3 to 5 other seed varieties N that have similar soil to c drain a adaptations. T 0 m Deertongue Dichanthelium N C By soil test 5/14/15 5/1-4/1 NR Sun& Yes Poorl No _Responds well to clandestinum/Tioga Shade drained to controlled burns. Mix with drought 3 to 5 other seed varieties that have similar soil drainage adaptations. Big Bluestem Andropogon gerardii/ N D By soil test 12/14/15 12/1-4/1 NR Sun NR Weill No Responds well to Warm season grass Rountree drained I lcontrolled burns. Mix with 3 to 5 other seed varieties that have similar soil drainage adaptations. Big Bluestem Andropogon gerardii/ N D By soil test 12/1-4/15 12/1-4/1 NR Sun NR Weill No Responds well to Warm season grass Kaw drained controlled burns. Mix with b 3 to 5 other seed varieties that have similar soil drainage adaptations. H Big Bluestem Andropogon gerardii/ N D By soil test 12/14/15 12/1-4/1 12/1-5/1 Sun NR Weill No Responds well to Warm season grass Earl drained controlled burns. Mix with 3 to 5 other seed varieties R that have similar soil draina a adaptations. Q Little Bluestem Schizach rium N Q. E By soil test 12/1-4/15 NR NR Sun NR Weill No Responds well to Warm season grass scoparium/Aldous drained controlled burns. Mix with A 3 to 5 other seed varieties that have similar soil �+ drainage adaptations. bG1 f0 Little Bluestem Schizach rium N E By soil test 12/1-4/15 12/1-4/1 NR Sun NR Weill No Responds well to Warm season grass n scoparium/Cimmaron drained lcontrolled burns. Mix with (3) 3 to 5 other seed varieties that have similar soil r drainage adaptations. V � 0 0 0 c fn m' m rn m HERBACEOUS PLANTS-Seeding recommendations for primary stabilization -00 1 Successfull development depends on planting date effectiveness goal: 6 mo.-3 yrs.without an ongoing maintenance program) Table 6.11.c(con't) m 1 p p p 9 l 9 Y 9 9 p 9 ) � NATIVE SPECIES m w Optimal Plantin g Dates C.0 D See Table Invasive s.11.d for Fertilization/ (D Botanical Name/ Native/ variety limestone Coastal Sun/Shade Riparian Yes or Installation/Maintenance Other information, tr Common Name Gulliver Introduced seedling rates Ibs/acre Mountains Piedmont Plains tolerant Wetlands Buffers No Considerations commentary rn� Little Bluestem Schizach rium N E By soil test NR NR 12/14/1 Sun NR Weill No Responds well to Warm season grass � scoparium/Common drained controlled bums. Mix with 0D 3 to 5 other seed varieties (R that have similar soil D drainage adaptations. W N Sweet Woodreed Cinna arundinacea N F By soil test 12/1-4/15 12/1-4/1 12/1-4/1 Sun& Yes 1 Poorly to No Mix with 3 to 5 other seed Warm season grass D mod.Shade well draine Ivarieties that have similar M soil drainage adaptations W W Rice Cut grass Leersia oryzoides N G By soil test 12/1-4/15 12/1-4/1 12/1-4/1 Sun Yes Poorly No Mix with 3 to 5 other seed Warm season grass -n drained varieties that have similar m soil drainage adaptations Indian Woodoats Chasmanthium lati olium N H By soil test 3/1-5/15 2/15-4/1 2/15-3/20 Sun& NR Well No Mix with 3 to 5 other seed Cool season grass 7/15-8/15 /15-10/1 9/1-11/1 mod.Shade drained varieties that have similar soil drainage adaptations Virginia Wild Rye El mus irginicus N I By soil test 3/1-5/15 2/15-4/1 2/15-3/20 Sun& NR Well No Mix with 3 to 5 other seed Cool season grass 7/15-8/15 /15-10/1 c 9/1-11/1 mod.Shade drained varieties that have similar soil drainage adaptations Eastern Bottlebrush EI mush stri N J By soil test 311-5/15 2/15-4/1 1 NR Sun& NR Well No Mix with 3 to 5 other seed Cool season grass Grass 7/15-8/15 /15-10/15 mod.Shade drained varieties that have similar soil drainage adaptations Soft Rush uncus a usus N K By soil test 12/1-5/15 12/1-5/1 12/1-4/15 Sun Yes Poorly No Mix with 3 to 5 other seed 8/15-10/15 9/1-11/1 drained varieties that have similar soil drainage adaptations Shallow Sedge Care lurida N L By soil test 12/1-5/15 12/1-5/1 12/1-4/15 Sun Yes Poorly No Mix with 3 to 5 other seed 8/15-10/15 9/1-11/1 drained varieties that have similar soil drainage adaptations Fox Sedge Care ul inoidea N L By soil test 12/1-5115 12/1-5/1 12/1-4/15 Sun Yes Poorly No I Mix with 3 to 5 other seed 8/15-10/15 9/1-11/1 drained varieties that have similar soil drainage adaptations NOTE: 1.Seeding rates are for hulled seed unless otherwise noted. 2.Fertilizer&Limestone-rates to be applied in absense of soils tests. Recommended application rate assumes significantly disturbed site soils with little or no residual value. 3.NR means Species not recommended for this region or application area. 4.Native,warm season grasses require six or more months to germinate under optimum conditions. If they are planted in the summer,then a whole y ear will have to pass before they germinate. 5.Invasive designation as determined by the N.C.Exotic Pest Pant Council and N.C.Native Plant Society. 6.Sprigging is not recommended for immediate stabilization unless terrain is flat,heavymulch is applied and no other immediate stabilization method is practical. O 7.Sodding for immediate stabilization-see primary stabilization charts (other information column)and Section 6.12. 8.Long term stabilization can only be accomplished with an adequate,immediate,and primary stabilization program. To achieve long term protective cover with the species listed in this chart,the approved plan,construction sequence and maintenance schedule must include sufficient detail to assure vegetation will be established and maintained. To assure the long term protective cover will be established,the reviewing and approving governing body may require a performance/maintenance bond. DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE Practice Standards and Specifications Table 6.11.d Seed Mixes for Native Species (Ibs/ac) When Mixed with 3, 4, or 5 Other Native Species (See Table 6.11.a for nurse crop species to be added to these mixes) 3 Other 4 Other 5 Other (total 4 species) (total 5 species) (total 6 species) Switch Grasses (A) 3.5 lbs. 3.0 lbs. 2.5 lbs. Indian Grasses (B) 7.0 lbs. 6.0 lbs. 5.0 lbs. Deertongue (C) 6.0 lbs. 5.0 lbs. 4.0 lbs. Big Bluestem (D) 7.0 lbs. 6.0 lbs. 5.0 lbs. Little Bluestem (E) 7.0 lbs. 6.0 lbs. 5.0 lbs. Sweet Woodreed (F) 2.5 lbs. 2.0 lbs. 1.5 lbs. Rice Cutgrass (G) 6.0 lbs. 5.0 lbs. 4.0 lbs. Indian Woodoats (H) 2.5 lbs. 2.0 lbs. 1.5 lbs. Virginia Wild Rye (1) 6.0 lbs. 5.0 lbs. 4.0 lbs. Eastern Bottlebrush Grass (J) 2.5 lbs. 2.0 lbs. 1.5 lbs. Soft Rush (K) 2.5 lbs. 2.0 lbs. 1.5 lbs. Sedges (L) 2.5 lbs. 2.0 lbs. 1.5 lbs. NOTE: With the native varieties, the seed mix should be in the range of 15 pounds per acre. Depending on availability of native seeds adaptable to North Carolina, the percentage of a particular variety used may be reduced or increased accordingly. Although diversity is desirable, it is imperative that the primary crop develop and become an effective protective cover. In addition to the native species mix, additional nurse crop species must be included to provide immediate stabilization and an adequate ground cover. Rev. /0 6.11.1 DocuSign Envelope ID: E39A7F34-1956-4F98-91AB-121A6B293FOE NORTH CAROLINA FARM BUREAU MUTUAL INSURANCE COMPANY, INC. 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