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Home My WebLink AboutAgenda - 04-01-2025; 8-f - Efland EMS Station Stormwater Operations and Maintenance Plan Agreement with Orange County (3800 US 70 West, Efland) 1 ORANGE COUNTY BOARD OF COMMISSIONERS ACTION AGENDA ITEM ABSTRACT Meeting Date: April 1, 2025 Action Agenda Item No. 8-f SUBJECT: Efland EMS Station Stormwater Operations and Maintenance Plan Agreement with Orange County (3800 US 70 West, Efland) DEPARTMENT: Asset Management Services (AMS), Emergency Services (ES) ATTACHMENT(S): INFORMATION CONTACT: Stormwater Operation and Maintenance Angel Barnes, 919.245.2628 Agreement Alan Dorman, 919.245.2627 Kirby Saunders, 919.245.6123 PURPOSE: To: 1) Approve a Stormwater Operation and Maintenance Agreement with Orange County for the Efland Emergency Services Station Stormwater Control Measures; and 2) Authorize the County Manager to sign the necessary paperwork upon final County Attorney review. BACKGROUND: Orange County requests a Stormwater Control Measure Operation and Maintenance Agreement for the Orange County Efland Emergency Services Station at 3800 US 70 West, Efland. In 2024, the stormwater system was installed to meet the required Unified Development Ordinance (UDO) standards. This is the operations and maintenance agreement per the Orange County UDO Section 6.14 Stormwater Management. FINANCIAL IMPACT: There is no financial impact for granting this Stormwater Operation and Maintenance Agreement. ALIGNMENT WITH STRATEGIC PLAN: This item supports: • GOAL 1: ENVIRONMENTAL PROTECTION AND CLIMATE ACTION OBJECTIVE 6. Protect water supply/watersheds. RECOMMENDATION(S): The Manager recommends that the Board: 1) Approve a Stormwater Operation and Maintenance Agreement with Orange County for the Efland Emergency Services Station Stormwater Control Measures; and 2) Authorize the County Manager to sign the necessary paperwork upon final County Attorney review. 2 ORANGE COUNTY NORTH CAROLINA STORMWATER OPERATION AND MAINTENANCE AGREEMENT Prepared By: Sean A Dolle, Grounded Engineering Return To: Travis Myren, Orange County In accordance with the provisions of Section(s) 2.21 and 6.14 of the Orange County Unified Development Ordinance (UDO), this document shall serve as the Operations and Maintenance Agreement for stormwater control measure(s) for the following: ORANGE COUNTY STORMWATER MANAGEMENT PLAN PROJECT FILE NUMBER: LDP21-0062 / SPR21-0005 PROJECT NAME: Efland EMS Station PROJECT ADDRESS: 3800 US 70 W, Efland, NC 27243 PROPERTY OWNER (legally responsible party): Orange County PARCEL IDENTIFICATION NUMBERS (PINs): 9844789258 PROJECT ENGINEER: Sean A Dolle BRIEF DESCRIPTION OF PROPERTY: 3.74 acres BRIEF DESCRIPTION OF PROJECT: County EMS Station Hereafter the `Project'. 3 STORMWATER OPERATION AND MAINTENANCE PLAN / CONDITIONS: Attachment A, (Dry Detention Basin Operation and Maintenance Agreement) establishes the operation and maintenance plan for the approved stormwater control measures approved for the Project. The undersigned Orange County — Travis Myren (Property Owner) acknowledges and agrees by signing below that they are responsible for the performance of the stormwater control measures (SCMs) contained within Attachment A and that these restrictions shall be binding on it and its successors in interest. Further, Orange County — Travis Myren (Property Owner) hereby acknowledges and agrees to inform the Orange County Planning and Inspections Department of any problems, including maintenance issues, with the system and further acknowledges and agrees to inform Orange County of any modification of the previously approved stormwater control measures (SCMs) or a change in the responsible party prior to the initiation of said modification. Signature Date NOTE: The Property Owner(legally responsible party) should not be a homeowners association unless more than 50% of the individual lots within the development have been sold and a resident of the subdivision has been named president. Further, maintenance of a stormwater control measure(s) (SCMs) shall not be transferred to a homeowners association without the holding of required meetings as detailed within the Orange County Unified Development Ordinance (UDO). NOTARY INFO HERE Operation & Maintenance Agreement 4 Project Name: Efland EMS Station Project Location: 3800 US 70 W, Efland, NC 27243 Cover Page Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location. Any deficient SCM elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the SCM(s). The SCM(s) on this project include (check all that apply&corres onding O&M sheets will be added automatically): Infiltration Basin Quantity: Location(s): Infiltration Trench Quantity: Location(s): Bioretention Cell Quantity: Location(s): Wet Pond Quantity: Location(s): Stormwater Wetland Quantity: Location(s): Permeable Pavement Quantity: Location(s): Sand Filter Quantity: Location(s): Rainwater Harvesting Quantity: Location(s): Green Roof Quantity: Location(s): Level Spreader- Filter Strip Quantity: Location(s): Proprietary System Quantity: Location(s): Treatment Swale Quantity: Location(s): Dry Pond Quantity: 1 Location(s): North end of site Disconnected Impervious Surface Present:911 Location(s): User Defined SCM Present: Location(s):Low Density Present: Type: I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for each SCM above, and attached O&M tables. I agree to notify NCDEQ of any problems with the system or prior to any changes to the system or responsible party. Responsible Party: Travis Myren, in his capacity as County Manager Title & Organization: Title &Org -County Manager, Orange County Street address: 300 West Tryon Street City, state, zip: Hillsborough, NC 27278 Phone number(s): 919.245.2308 Email:I tmyren@orangecountync.gov Signature: Date: I, a Notary Public for the State of County of do hereby certify that personally appeared before me this day of and acknowledge the due execution of the Operations and Maintenance Agreement . Witness my hand and official seal, Seal My commission expires STORM-EZ 3/10/2025 Version 1.5 O&M Agreement Page 1 of 1 Dry Pond Maintenance Requirements Important operation and maintenance procedures: 5 - The drainage area will be managed to reduce the sediment load to the dry pond. - Immediately after the dry pond is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). - After the initial fertilization to establish vegetation in the dry pond, fertilizer will not be applied to the dry pond. - The vegetation in and around the basin will be maintained at a height of approximately six inches. - At least once annually, a dam safety expert will inspect the embankment. Any problems that are found will be repaired immediately. After the dry pond is established, it shall be inspected quarterly and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance shall be kept in a known set location and shall be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. SCM element: Potential problem: How to remediate the problem: The entire SCM Trash/debris is present. Remove the trash/debris. Areas of bare soil and/or Regrade the soil if necessary to remove the gully, plant ground The perimeter of the SCM erosive gullies have cover and water until it is established. Provide lime and a one- formed. time fertilizer application. The inlet pipe is clogged (if Unclog the pipe. Dispose of the sediment in a location where it applicable). will not cause impacts to streams or the SCM. The inlet pipe is cracked or The inlet device otherwise damaged (if Repair or replace the pipe. applicable). Erosion is occurring in the Regrade the swale if necessary and provide erosion control swale (if applicable). devices such as reinforced turf matting or riprap to avoid future problems with erosion. Sediment has accumulated Search for the source of the sediment and remedy the problem if to a depth greater than the possible. Remove the sediment and dispose of it in a location original design depth for where it will not cause impacts to streams or the SCM. sediment storage. The forebay Erosion has occurred. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Weeds are present. Remove the weeds, preferably by hand. If pesticide is used, wipe it on the plants rather than spraying. Sediment has accumulated Search for the source of the sediment and remedy the problem if to a depth greater than the possible. Remove the sediment and dispose of it in a location original design depth for where it will not cause impacts to streams or the SCM. sediment storage. The main treatment area Water is standing more Check the outlet structure for clogging. If it is a design issue, than 5 days after a storm consult an appropriate professional. event. Weeds and noxious plants Remove the weeds, preferably by hand. If pesticide is used, wipe are growing in the main it on the plants rather than spraying. treatment area. Dry Pond Maintenance Requirements (continued) SCM element: Potential problem: How to remediate the problem: 6 Shrubs have started to Remove shrubs immediately. grow on the embankment. Evidence of muskrat or Consult a professional to remove muskrats or beavers and repair beaver activity is present. any holes or erosion. The embankment A tree has started to grow Consult a dam safety specialist to remove the tree. on the embankment. An annual inspection by an appropriate professional Make all needed repairs immediately. shows that the embankment needs repair. Clogging has occurred. Clean out the outlet device. Dispose of the sediment in a location gg g The outlet device where it will not cause impacts to streams or the SCM. The outlet device is damaged Repair or replace the outlet device. Erosion or other signs of damage have occurred at Repair the damage and improve the flow dissipation structure. the outlet. The receiving water Discharges from the dry pond are causing erosion Contact the local NCDEQ Regional Office. or sedimentation in the receiving water. Dry Detention Pond Design Summary Dry Pond Diagram 7 DRY POND ID FOREBAY MAIN POND Temporary Pool El: Temporary Pool El: Clean Out Depth: 0 Clean Out Depth: 0 Pretreatment Yes Sediment Storage El: Sediment Storage El: Has Veg. Filter Yes Bottom Elevation: Bottom Elevation: � | | - - - - - - - - - - - US HWMy70 STORMWATER CONTROL MEASURE PROPOSE BUILDIN SCM LOCATibN MAP