HomeMy WebLinkAbout2015-113 Planning - City of Durham, construction, operation of water and sewer facilities in the Eno EDD amendment � 1
_Please return this copy to the Clerk to the Board's
office for permanent agenda file. /2-jW-
dD�S- P 3 7-02-
Attachment 2
FIRST AMENDMENT TO THE INTERLOCAL AGREEMENT
BETWEEN ORANGE COUNTY AND THE CITY OF DURHAM
FOR CONSTRUCTION AND OPERATION OF WATER AND SEWER FACILITIES
IN THE ENO ECONOMIC DEVELOPMENT ZONE OF ORANGE COUNTY
The City of Durham, a North Carolina municipal corporation("Durham") and Orange
County,a North Carolina political subdivision("Orange")entered into an "Interlocal Agreement
Between Orange County and the City of Durham for Construction and Operation of Water and
Sewer Facilities in the Eno Economic Development Zone of Orange County" ("Original
Agreement")on January 20, 2012. As a result of the November 2013 Draft Master Plan Report
prepared by CDM Smith,Durham and Orange would like to amend the Original Agreement
through this First Amendment to allow for additional time to study alternative design options.
Through this First Amendment the Original Agreement is only modified as indicated below and
the remaining portions of the Original Agreement shall remain in full force and effect. This First
Amendment is dated, made, and entered into as of the_day of 12015.
Paragraph 12 of the Original Agreement is modified as follows:
12. Duration. This agreement shall be perpetual,unless terminated earlier by mutual
agreement. Nevertheless,this contract shall terminate if construction of the infrastructure
has not begun by January 31, 2017. On such termination, all obligations that are still
executory on both sides are discharged but any right based on prior breach or
performance survives. The governing body of each party hereto has determined the
duration provided in this paragraph to be reasonable.
This amendment is made pursuant to Paragraph 14 of the Original Agreement.
This instrument has been pre-audited in the manner required by the Local Government Budget
and Fiscal Control Act.
Durham Finance Director Orange Financial Services Director
9
CITY OF DURHAM
ATTEST:
By:
City Clerk City Manager
Type or print name person signing for the City:
ACKNOWLEDGMENT BY CITY OF DURHAM
Name of other party to the
contract:
Title of the contract:
a notary public, certify:
(Type or print name of Notary Public)
(1) personally appeared
before me
(Type or print name of City Clerk or Deputy City Clerk who attested)
in Durham County,N. C. on this day; (2)I have personal knowledge of her identity; and(3)she
acknowledged that by authority duly given and as the act of the City of Durham, the foregoing
document was signed in its corporate name by its City Manager, sealed with its
corporate seal, and attested by its said City Clerk or Deputy City Clerk.
This the day of ,20
My commission expires:
Notary Public
10
ORANGE COUNTY
17 sz
AT T•
Donna Baker Bonnie B. Hammersley
Orange County Clerk County Manager
ACKNOWLEDGEMENT OF ORANGE COUNTY
NORTH CAROLINA
COUNTY OF oR*w,.E GurLftRD
I, a Notary Public in and for the aforesaid County and State certify that Donna S. Baker
personally appeared before me this day and acknowledged that she is the County Clerk of
Orange County, a North Carolina political subdivision, and that by authority duly given and as
the act of the County, the foregoing agreement with the City of Durham was signed in its
corporate name by the Orange County Manager, sealed with its corporate seal and attested by its
said County Clerk or Deputy County Clerk, this the&4 ay of 3' ,
20)5.
a
otary Pu lic
Donna S.Lloyd
M commission expires: Notary Public
My p Guilford County
North Carolina
M Commission Expires
■
_Please return this copy to the Clerk 3
Attachment 1 office for permanent agenda files d4ly otard,'cs�
INTERLOCAL AGREEMENT
BETWEEN ORANGE COUNTY AND THE CITY OF DURHAM
FOR CONSTRUCTION AND OPERATION OF WATER AND SEWER FACILITIES
IN THE ENO ECONOMIC DEVELOPMENT ZONE OF ORANGE COUNTY
alt,
This agreement is dated,made,and entered into as of the day of ,
20 JA,by the City of Durham,a North Carolina municipal corporation('Durham)and Orange
County, a North Carolina political subdivision("Orange").
Purposes. The purposes of this agreement are(1)to further the economic development potential of land
identified by Orange County and the City of Durham in their respective.planning documents as
particularly suitable for industrial development,as well as to promote the public health and safety of
residents within the area,and(2)to accomplish the design,construction,and operation of water and sewer
services within the Eno Economic Development District.
1. Definitions
Year—July 1—June 30
Zone—The Eno Economic Development District located at the eastern boundary of
Orange where U.S.Highway 70 and Interstate Highway 85 intersect,shown in greater
detail by the map titled"Eno Economic Development Zone Utility Service Boundary"
and attached as Exhibit A. The Zone does not include land in Durham County.
2. Desi . Durham will solicit and receive proposals for the design of water and sewer
infrastructure to serve the Zone.Before awarding contracts for such design,Durham will
provide Orange with the proposals and other responses to the request for proposals so that
Orange may review and comment to Durham regarding the selection of the designer(s).
Durham will then proceed to negotiate the professional fees with the designer(s). The fees
must be satisfactory to Orange. Durham will not select any designer to which Orange obj ects
based on the qualifications and/or professional fees. If Orange does not object within a
reasonable time to a designer and its proposed fee structure,Durham may award a contract to
the designer for such design in which the proposed fee structure applies. Orange will
reimburse Durham for all payments that Durham is required to pay under the contracts.
Therefore,Durham will invoice Orange as invoices are received from the selected
designer(s)for payments made or required to be made under the design contracts. Orange
will pay each invoice within thirty(30)days after it receives it.
3. Construction. Durham will solicit bids for the construction of the infrastructure. Durham will
share the proposals with Orange. Orange may comment to Durham as to which contractor(s)
the award should be made. If Durham concurs, and if Durham determines it appropriate to
do so,Durham will award the contract(s)to those contractor(s)and execute contract(s)with
them. If Durham does not concur,or if Durham otherwise finds it appropriate to rebid,
Durham will rebid and continue the process described in this paragraph until Durham makes
an award unless the Durham City Manager and the Orange County Manager jointly agree to
suspend or abandon the process. By authorizing their respective managers to sign this
agreement,the parties' governing bodies authorize them to agree to suspend or abandon the
JNTERIOCdLAGREEMF,VTBETWEE,V ORANGE COUNTYAND THE CJTY0FD0RI1AMFOR CONSTRUCTIONAND
OPERATION OF WATER AND SEWER FACILITIES IN THE ENO ECONOMIC DEVELOPMENT ZONE OF ORANGE
COUNTY,page 2
process if they jointly determine it is prudent to do so, If the managers do not jointly agree it
is prudent to suspend or abandon the process,it is agreed that suspension or abandonment
will not be effective unless the parties' governing bodies jointly agree to suspend or abandon.
4. P4yment. For each construction contract,Orange will select payment option A or payment
option B and will notify Durham of its selection within twenty days after Durham shall have
executed the construction contract. Payment option A:Durham will invoice Orange from as
invoices are received from the selected construction contractor for payments made or
required to be made under the construction contracts. Orange will pay each invoice within
thirty(30)days after it receives it.Payment option B:Orange will reimburse Durham for
payments made or required to be made under the construction contracts over a 10-year
period,beginning on substantial completion,at an annual interest rate of 5%.The remainder
of this paragraph applies to both payment options. [Provided however Orange shall not be
required to pay for services that were not appropriately authorized or ratified by Durham or
which Durham did not find to be satisfactorily performed by the contractor,provided that
Durham will not be liable to Orange for making a finding of satisfactory performance.
Durham will insert in the construction contracts a provision stating,"Orange County,a N. C.
political subdivision,is a third-party beneficiary of this contract."
5. Construction Standards. In all respects except to the extent otherwise stated in this contract,
the construction will be done in accordance with(i)Durham standards,requirements,and
procedures,including approvals of plans,conducting inspections,requiring tests and
certifications,and requiring as-built drawings,and(ii)any applicable federal and state
standards.
6. Ownership of and Responsibility for Infrastructure.Durham will be the owner of and
responsible for the operation and maintenance of the infrastructure constructed under the
construction contracts.All construction contracts shall provide for the indemnification and
defense by the contractors of both Orange and Durham.
7. Fees and Charges. As long as a particular property is located outside Durham's corporate
limits,Durham will impose,process,and collect all fees and charges with respect to that
particular property,including acreage fees,connection charges,frontage charges,capacity
cliarges,and utility rates,as Durham charges on other locations outside Durham's corporate
limits, Except to the extent specified otherwise,Orange will have no right to any of those
fees and charges,and nothing in this agreement will affect the use or disposition of those fees
and charges.
8. Reduction in Payments from Orp-&e—. The acreage fees and frontage charges collected by
Durham from the Zone will be used towards payment of the design and the construction of
the infrastructure(collectively,the"Dedicated Receipts").. ("Acreage fees"means impact
fees(as defined in Durham City Code sections 30-81 et seq.)that are based on area.) No
other fees or charges collected by Durham,such as capacity and connection charges,will be
used for that purpose. The amounts to be paid by Orange to Durham under paragraph 4
above in a particular Year will be reduced by the Dedicated Receipts received by Durham in
that Year, if the Dedicated Receipts received by Durham in that Year-exceed the amounts to
5
r
INTERLOCAL AGREEMENT BETWEEN ORANGE COUNTYAND THE CITY OFDURHAMFOR CONSTRUCTIONAND
OPERATION OF WATER AND SEWER FACILITIES IN THE ENO ECONOMICDEVELOPMENT ZONE OF ORANGE
COUNTY,page 3
be paid by Orange under paragraph 4 in that Year,the excess Dedicated Receipts will be
carried forward and used similarly to reduce the amounts to be paid by Orange under
paragraph 4 in the following Years. The Dedicated Receipts received only during the ten
Years beginning on the first July 1 after substantial completion of the relevant infrastructure
will be applied in this manner. Nevertheless,the ten Year period shall end on or before the
expiration of fifteen Years beginning on the first July 1 after the date of this contract.
Nothing herein means that Durham will make any payment to Orange on the ground that the
Dedicated Receipts exceed,in any Year or Years,the amounts to be paid by Orange under
paragraph 4. If Durham is required by a court of competent jurisdiction to refund any
acreage fees or frontage charges that were used towards payment of the design and the
construction of the infrastructure by means of the Dedicated Receipts process described
above in this paragraph, Orange shall reimburse Durham(i)to the extent the amounts paid by
Orange to Durham under paragraph 4 above in a particular Year were reduced by the
Dedicated Receipts attributable to the amounts refunded, and(ii)for interest associated with
the refunds of the acreage fees or frontage charges that Durham is required to pay by a court
of competent jurisdiction.
9. NondiscriminatoKy Policies. Durham will not establish policies that impose a level of water
and sewer service in the Zone that is inferior to that provided to similarly situated users of
Durham water and sewer services.
10. Annexation. Durham may enter into agreements with developers and property owners that
they will comply with requirements that Durham desires related to annexation,including that
they will not seek annexation by any municipality other than Durham;that they will petition
for annexation when requested by Durham;and that they will be subject to remedies for
violating the annexation-related provisions.
11. Re ug_lations. Durham shall have the authority to protect and regulate the water and sewer
systems and its users in the Zone,including water use restrictions and regulations respecting
introduction of pollutants into the wastewater system.
12.Duration. This agreement shall be perpetual,unless terminated earlier by mutual agreement.
Nevertheless,this contract shall terminate if construction of the infrastructure has not begun
within three(3)years of the date of this agreement. On such termination,all obligations that
are still executory on both sides are discharged but any right based on prior breach or
performance survives.The governing body of each party hereto has determined the duration
provided in this paragraph to be reasonable.
13.Anuointment of Personnel. The City Manager shall designate persons to carry out Durham's
obligations under this agreement. The County Manager shall designate persons to carry out
Orange's obligations under this agreement.
14.Amendment and Termination. This agreement may be amended or terminated by agreement
of the parties. An amendment is not valid unless signed by both parties and otherwise in
accordance with requirements of law. An amendment is not enforceable against Durham
unless it is signed by its City Manager,or a deputy or assistant City Manager. An
6
B TERLOCALA GREEMENTBETWEENORANGECOUNTYAND THE CITY OFDURMAMFORCONSTRUCTIONAND
OPERATION OF WATER AND SEWER FACILITIESINTHE ENO ECONOMICDEVELOPMENT ZONE OF ORANGE
COUNTY,page 4
amendment is not enforceable against Orange unless signed by the County Manager or Chair
of the Board of County Commissioners.
15.Notice.
(a)All notices and other communications required or permitted by this agreement shall be in
writing and shall be given either by personal delivery,UPS,Federal Express,or certified
United States mail,return receipt requested,addressed as follows. The parties are requested
to send a copy by email.
To Durham:
Mr. Thomas J.Bonfield
City Manager
City of Durham
101 City Hall Plaza
Durham,NC 27701-3329
Email: tom.bonfield @durhamnc.gov
To Orange:
Frank Clifton
Orange County Manager
200 S.Cameron Street
P.O. Box 8181
Hillsborough,NC 27278
Email: fclifton @co.orange.nc.us
(b)Change of Address. Date Notice Deemed Given. A change of address,fax number,or
person to receive notice may be made by either party by notice given to the other party. Any
notice or other communication under this agreement shall be deemed given and sent at the
time of actual delivery,if it is personally delivered. If the notice or other communication is
sent by United States mail,it shall be deemed received upon the third calendar day following
the day on which such notice or other communication is deposited with the United States
Postal Service or upon actual delivery,whichever first occurs.
16. No Third Party Rights Created. This agreement is intended for the benefit of the two parties
and not any other person and no rights or benefits are created for or granted to any third party
by this agreement.
This instrument has been pre-audited in the manner required by the Local Government Budget
and Fiscal Control Act.
Durham ac Director Orange Financial Services Director
7
I
INTERLOCAL AGREEMENT BETWEENORANGE COUNTYAND THE CITY OFDURHAMFOR CONSTRUCTIONAND
OPERATION OF WATER AND SEWER FACILITIESIN THE ENO ECONOMIC DEVELOPMENT ZONE OF ORANGE
COUNTY,page S
Of D.
CITY OF DURHAM
TTEST:
i ►ICI r'fS�:1':::• 'Q ��
• °j .' omas J.Bonfield
Clerk �rVrr �Lf �I'+� City Manager
r�
COUNTY OF ORANGE
ATTEST:
17
5g y: /">7,1
/ �� Frank - r'
l(Juu Clerk � � County Manager
NORTH CARINA ACKNOWLEDGMENT OF CITY OF DURHAM
COUNTY of a U-r ncA rr-1
I,aalloary Ppblic m and fo o aforesaid County and State certify that
_ (1 f-eA, personally appeared before me this day,and
acknowledged that he or she is the City Clerk of the City of Durham,a municipal corporation,and
that by authority duly given and as the act of the City,the foregoing agreement with the County of Orange was
signed in its corporate name by its City Manager,sealed with its corporate seal,and attested by its
said City Clerk or Deputy City Clerk. Thi e_ day of �GrYI t'Q Y 201-2—
i
Notary Public ,..'Jc;�T T,, ,
My commission expires; OT,
—� 2-461-7 ,c N
Q z
NORTH CAROLINA ACKNOWLEDGMENT OF COUNTY OF ORANGE =G
A
COUNTY of O an 2
•�•i�••.•..i.i.tJ.1II�11~a
I,a Notary Public in and for the aforesaid County and State certify that
D anna S' gnikef personally appeared beforp,�e t�ii's day,and
acknowledged that be or she is the County Clerk of�OrangOAA o Carolina political
subdivision,and that by authority duly given d as the act of the County,the foregoing a;reement with the City of
Durham was signed in its corporate name by its ()rmya 2 County 9anager,sealed w'th its corporate seal,and
attested by its said County Clerk or Deputy County Clerk.Jrh—is the�L_day of
20 It
OFFICIAL SEAL
Nolary Public,NOM WMI[na
Notary Public ORANGE COUNTY
My commission expires: S "7 Z 0 t� P DAVID HUNT
1 My soommill fan ffx Tres
Approved as to form and legal sufficiency.
QWntf Attorney
i
11
i
Attachment 3 '
Section 1
Introduction
5%
1.1 Project Background and Objectives
In recent years,Orange County(County)has taken a proactive role in the recruitment of business and
industry and has established three strategic economic development districts as part of its strategy.
One of those districts is the Eno Economic Development District(Eno EDD),previously known as the
Interstate 85/US Highway 70(1-85/US Hwy 70)Economic Development District,and is strategically
located near the intersection of 1-85 and US Hwy 70.This economic development area will be able to
capitalize on its location within the City of Durham's(City)Urban Growth Area to provide water and
sewer service to future customers,which are zoned to include a mixture of industrial,commercial,and
high density residential development.
With this project,the City and County are collaborating to construct the backbone of a water and
i
sewer system within the Eno EDD that will promote an effective growth pattern in the County with
respect to location and phasing.The major objectives of this master plan are as follows.
■ Develop water demand and sewer flow projections
Determine the appropriate size and location for a sewer lift station
■ Determine the appropriate size and route of a force main to carry wastewater flow from the
proposed sewer lift zytation to a discharge point within the City's sewer collection system
■ Determine the appropriate size and location of a gravity sewer collection system and water
transmission$ystem backbone
■ Develop conceptual bpinions of probable cost for the recommended improvements
i
1.2 Project Area
The Eno EDD 10 apps oximately 796 acres and is located in eastern Orange County,bordered to the
north by 1-85 4nd U9 Hwy 90,to the east by the Durham and Orange County border,to the south by
the Norfolk S611thero railroad,and to the weft by Stony Creek,as shown on Figure 1-1.The area is
primarily undl8veloped with some rural residential and light business scattered south of 1-85.
The Eno EDD is located within the Eno River Watershed,which eventually discharges into the Neuse
} River.In general,tho area flows in a northerly direction into tributaries to the Eno River.There is
significant toppgraphic change within the area,ranging in elevation from 414 feet to 538 feet,a
difference of 124 feet.
i
i
i
i
Smith 1-1
Section 1 • Introduction
1.3 Scope of Study
The scope of work for this master plan was developed by CDM Smith,City,and County staff and 17
consists of the following primary tasks:
■ Flow and Demand Projgctions
• Proposed Water and Wastewater Infrastructure within Eno EDD
• Force Main Discharge Alternatives
■ Permit Agency Coordination
■ Cost Estimates i
• Master Plan Report
A brief description of each task follows.
Flow and Demand Projiections
The purpose of this task was to utilize available zoning and planned-development data to develop
water demand and wastewater flow projections within the Eno EDD,which in turn would be used to
layout the proposed water and wastewater infrastructure backbone.
Proposed Water and Wastewater Infrastructure within Eno EDD
The purpose of this task was ti)develop a conceptual layout of the recommended water distribution,
wastewater collection,and wastewater pump station and force main infrastructure within the Eno
EDD.A combination of wastewater flow/water demand projections and physical site characteristics, *�
such as topography,streams,and roads,were used to layout the proposed infrastructure that would
serve as the backbone of the system.
Force Main Discharge Alternatives
The purpose of this task was tb identify and evaluate various alternatives for Where the wastewater
flow generated within the Eno EDD could be discharged into the City's wastewater collection and
conveyance system.The location of the Eno EDD basin is such that the wastewater flow could
i
potentially be discharged into either one of the City's two water reclamation facility(WRF)basins,the
North Durham WRF or the South Durham WRF.There are three potential outfalls the Eno EDD flow
could be discharged to:
■ North Durham WRF Basin
i
The Eno Outfall,which is located in the Eno Basin
-The Ellerbe Creek Outfall,which is located in the North Durham Basin
■ South Durham WRF Baain
-The Mud Creek Outfall,which is located in the Farrington Basin
For the purposes of this report,the three potential discharge locations will be referred to as the Eno
Outfall,Ellerbe Creek Outfall,and Mud Creek'Outfall.
1-2 Vfflb1
13
Section 1• Introduction
Permit Agency Coordination
The purpose of this task was to identify the potential permitting needs and coordinate with the
associated regulatory agencies,if needed,on what the permit requirements would be.The types of
permitting needs related to work such as stream channel crossings,wetland crossings,and North
Carolina Department of Transportation(NCDOT)encroachment.
Cost Estimates
The purpose of this task was to develop conceptual opinions of probable cost for the proposed water
and wastewater infrastructure within the Eno EDD.
Master Plan Report
The purpose of this section was to document the evaluations and findings from the previous tasks into
a comprehensive master plan report that would guide the City and County moving forward.
1.4 Report Format
The remainder of this report is organized-into the following sections,with a brief description of each
sections purpose following the name:
■ Section 2-Water Demand and Wastewater Flow Projections: This section provides a
description of the methodology and assumptions by which the demand and flow projections {
were developed.
■ Section 3-Evaluation of Existing Water Infrastructure within the Eno EDD: This section
provides a description of the existing water infrastructure within the Eno EDD followed by the
evaluation that was performed to determine the additional infrastructure required to provide
the backbone for the system.
■ Section 4-Proposed Wastewater Collection System within Eno EDD: This section describes the
process by which the recommended wastewater collection system infrastructure within the Eno
EDD was developed.
■ Section 5-Conveyance to the City of Durham's Wastewater Collection System: This section
describes the alternatives analysis that was performed to determine where in the City's
wastewater system the wastewater flows generated in the Eno EDD should be discharged.
■ Section(-Engineer's Opinion of Probable Cost: This section provides a description of how the
costs we're developed as well as a breakdown of the cost by each of the major infrastructure
componEnts.
■ Section -Permit Requirements: This section provides a description of the environmental
impacts that are anticipated if the proposed infrastructure were constructed as well as a list of
#11 permits that would be anticipated to be required prier to initiating construction.
1
` Section$-Conclusions and Recommendations: This section provides a brief summary of the
recommended infrastructure and associated cost followed by the options for how the City and
County can advance the project forward.
Wul 1-3
P
14
Section 8
Conclusions and Recommendations
The purpose of this section is to present a summary of the conclusions presented in Sections I
through 7 of this report and discuss options for project implementation,
8.1 Conclusions
The primary objective of this project is for the City and County to collaborate to construct the
backbone of a water and sewer system Within the Eno EDD that Will promote an effective growth
pattern in Orange County with respect to location and phasing.in order to develop the backbone
system,CDM Smith has performed an evaluation of the Eno EDD to develop projected water and
wastewater.flows,determine what infrastructure will be needed to create the backbone,determine
where the generated wastewater will be discharged in the City's sewer system,identify potential
permitting needs,and develop conceptual opinions on probable cost.
The water demands and wastewater flows developed for the Eno EDD are summarized in Table 8-1.It
can be seen from the table that the projected average water demands vary from 76,000 gpd in year
2020 under the Low scenario to 895,000 gpd by build-out under the High scenario.The projected
average wastewater flows vary from 60,000 gpd in year 2020 under the Low scenario to 715,000 gpd
by build-out under the High scenario.
if Table 8-1.Summary of Average Day Water Demand and Wastewater Flow.Projections by Planning
Period
Planning Period god)
Projectlons[1,2] 2020 2030: 2,040 2050 2060 Build-out -
Low Water 76,000 176,000 277,000 378,000 479,000 504,000
Mid Water 105,000 245,000 384,000 524,000 664,000 699,000
High Water 134,000 313,000 492,000 671,000 850,000 895,000
Low Wastewater 60,000 141,000 221,000 302,000 382,000 402,000
Mid Wastewater 84,000 195,000 307,000 419,000 530,000 558,000
High Wastewater 107,000 250,000 393,000 536,000 679,000 715,000
Notes:
1) The Low,Mid,and High projections differ based on the assumed unit water demand factor for industrial development.
The Low projection assumed 1,000 gpd/acre,the Mid projection 1,500 gpd/acre,and the High projection 2,000 gpd/acre.
2) The wastewater projections are based on an assumed water return rate of 80 percent.
3) The percentage of growth between planning periods was provided by Orange County.
The Eno EDD currently has a 16-inch diameter waterline installed in the project area.Based on a
hydraulic model analysis,the existing water main has sufficient capacity to meet the near-term and
build-out demands for the Low and Mid scenarios.There are some minor flow and headloss
deficiencies for the High flow scenario under build-out conditions,however it would be anticipated
"M -1
8
15
Section 8 • Conclusions and Recommendations
that improvements implemented in the City's system by the time build-out were to occur may address
the minor deficiencies.Therefore,no additional water distribution infrastructure is recommended.
The only municipal wastewater infrastructure within the Eno EDD is a small pump station near the
eastern most boundary of the project area that conveys a small amount of flow to the City. Therefore,
a wastewater collection and conveyance system backbone is required within the Eno EDD.
Recommended collection system infrastructure and associated conceptual opinions of probable cost
were developed for the Low and High wastewater flow scenarios.Tables 8-2 and 8-3 present the
recommended infrastructure and associated cast for the Low and High flow scenarios,respectively.
In order to construct the recommended infrastructure,a number of regulatory permits will be
required.In an effort to minimize environmental impacts and associated permitting efforts,trenchless
construction methodologies were assumed for stream and roadway crossings.The potential need for
an EA/EIS could be required as a result of the amount of infrastructure included in the project,but is
not a certainty.If the gravity sewer and force main proposed to parallel US Hwy 70 cannot be installed
within the NCDOT road ROW,the need for an alternative alignment and/or easement acquisition
could be required,which would lengthen the project schedule and impact project cost.This would
need to be addressed early in the design phase to minimize impacts.
8.2 Cast Reduction Options
It is recognized that the costs presented in either Table 8-2 or Table¢-3 would be a significant
investment for the County and that immediately funding the project in its entirety will be a challenge.
Therefore,the following options to potentially reduce project cost aqd/or phase the improvements
were identified and are presented below.
Construct only the pump station and force main.Collection system infrastructure could be ;
constructed by developers on an as-needed basis,or by the Cofmty if additional funding
becomes available,
® Construct the pump station,force main,and only the most critical collection system
infrastructure.The collection system piping recommended for this option includes gravity pipes
2,4,and 6,as identified on Figure 6-1.Constructing these gravity pipes would prevent
developers from having to impact Rhodes Creek and US Hwy 70,both of which will have. q
permitting challenges. '
Construct the force main from the proposed pump station to a manhole in the City's wastewater 1
collection system near the Eno EDD boundary,as opposed to qll Xhe way to the r(.§commended
location in the South Durham Basin,d6scribed in Section 5.This Option would teinporarily '
reduce the amount of force main and gravity sewer pipe by approximately 11,000 feet.It is
expected that this alternative discharge point will onlyha-�e sufficient capacity td receive
wastewater flows in the near-term,and that the additional for�e main would be needed in the
future.The force main and pump station would still be degigndd to handle future flows so that
when the discharge point into the City's wastewater system noeds to be relocated tt)the
recommended location in the South Dtirhatn Basin,the existing force mAin would only have to
be extended(i.e.not upgraded).Additional modeling and dingioeoring eyaluation will be
required to determine where and how much wastewater flow ca-ti be discharged to the
alternative location in the City's system.
8-2 I M"Ith
16
Section 8• Conclusions and Recommendations
Table 8-2.Opinion of Probable Construction Cost—Low Wastewater Flow Scenario
Associated System Description Unit Quantity Cost
Gravity Sewer-8-inch DIP Lf 12,123 $620,8001
Jack&Bore Lf 1202 $60,000
Eno EDD Gravity System 1 i
Gravity Sewer-12-inch DIP Lf 368 $25,000
Gravity Sewer Manhole3 Ea 45 $270,000
Pump Station4 MGD 0.7 $486,000
8-inch f=orce Main Lf 7,000 $315,000
8-inch Jack&Bore Lf 1605 $80,000
Eno EDD Conveyance System to 12-inch Gravity Sewer Lf 11,300 $757,1006
Durham Sewer System 12-inch Jack&Bore Lf 100 $65,000
Gravity Sewer Manhole Ea 38 $228,000
Traffic Control? Lf 8,000 $180,000
Pavejnent Replacement Sy 1,000 $42,000
Subtotal $3,129,000
x
5%Mobilization $160,000
Subtotal $3,29Q,000 I
• I
10%Contractor OH&P $329,Q00
Subtotal $3,62Q,000
25%Contingency $910,Q00
Subtotal $4,53Q,000
i
20%Engineering,Permitting,and Administration $910,000 f
TOTAL $5,44Q,000
Notes:
1) Cost reflects various depths of cover. Not shown in table for clarity.
2) Jack&Bore costs reflect two(2)60-ft bores. See Note 10.
3) Gravity sewer manhole spacing of 300 feet.
4) Pump station and associated force main sized for Year 2045.
1
5) Jack&Bore costs reflect one(1)100-ft bore and one(1)60 ft bore. See Note 10.
6) Cost assumes 10-feet of cover. j
7) Traffic control required during installation of force main along Hwy 70. f
8) Eno EDD gravity sewer system was sized based on High flow scenario with a peaking factor of 2.5
9) Cost does not reflect pump replacement by 2035.
10) Jack&Bores were assumed for:
r 60-ft bore under Hwy 70(Eno EDD Gravity System)
• 60-ft bore understream crossing near pump station(Eno EDD Gravity System•&Conveyance System)
100-ft bore under SR 751 along force main route(Eno EDD Conveyance System)
• 100-ft bore under railroad along force main rpute(Eno EDD Conveyance System)
miitit 8-3
I,
17
r
�endauons
aii►le Const ixs#ion Cost—High-Wastewater flow Scenario
Cost Esiimat6
Associated r m
u t
Gravity Sewer-8-inch DIP Lf 6,669 $358,000,
! ;
/ Jack&Bore Lf 120z $78,000
Gtavity;Sp tern 1
Gravity Sewer-12-inch DIP Lf 5,822 $420,040
Gravity Sewer Manholes Ea 45 $270,000
Nmp Station -MGD 1.2 $540,000
12-inch Force Main Lf 7,000 $378,000
12-inch Jack&Bore Lf 1605 $104,000
h Se L 1130fl 1,220,00e
Eno EDD Conveyance System to 18 me Gravity wBr f $
Durham Sewer System 18-inch Jack&Bore Lf 100 $125,000 '!
Gravity Sewer Manholes Ea 38 $228,000
Traffic Control Lf 8,000 $180,000
Pavement Replacement Sy 1,000 $42,000
Subtotal $3,943,000
5%Mopilization/Demobilization $200,000
Subtotal $4,140,000
10%Contractor OH&P $414,000
Subtotal $4,550,000
259 Contingency $1,140,000
Subtotal $5,690,000
201 Engineering,Permifting,and Administration $1,140,000
TOTAL $6,830,000
Notes:
1) Cost reflects various depths of cover. Not shown in table for clarity.
2) Jack&Bore costs reflect two(2)60-ft bores. See Note 10.
3) Gravity sewer manhole spacing of 300 feet,
4) Pump station sized for 30 year flows.
5) Jack&Bore costs reflect one(1)100-ft bore and one(1)60-ft bore. See Note 10.
6) Cost assumes 15-feet of cover.
7) Traff ic control required during installation of force main along Hwy 70,
8) Eno EDD gravity sewer system was sized based on High flow scenario with a peaking factor of 2.5
9) Cost does not reflect pump replacement by 2035. t
10) Jack&Bores were assumed for: 1
• 60-ft bore under Hwy 70(Eno EDD Gravity System)
■ 60-ft bore under stream crossing near pump station(Eno EDD Gravity System&Conveyance System)
100-ft bore under Sit 751 alongforce main route(Eno EDD Conveyance System) 1
■ 100-ft bore under railroad along force main route(Eno EDD Col vegance System) /
8-4 t'
F" 18
Section 8■ Conclusions and Recommendations
■ Construct the pump station and force main to convey only near-term wastewater flows,with
the understanding that both will need to be upgraded in the future.This option will cost
significantly more money for the County over the lifetime of the project,but have a lower initial
capital cost.Additional modeling and engineering evaluation will be required to determine
where and how much wastewater flow can be discharged in the City's system and what the
required infrastructure will be.
�G 8.3 Recommendations
The County has included approximately$1,500,000 in their Capital Improvement Program to fund
1 design and construction of water and wastewater improvements in the Eno EDD.Based on the cost
estimates presented in Tables 8-2 and 8-3,there is not currently enough funding available to construct
the recommended wastewater infrastructure for either wastewater flow scenario. Therefore,the
County will have to consider alternatives in order for this project to continue to move forward,
C possibly in addition to the cost reduction options presented in Section 8.2.Based on discussions with
County and.City staff,the following alternatives may be considered.
8.3.1 Alternatives
Alternative 1—Design and Construction of Improvements
This alternative includes continuous design,permitting,bidding,and construction of the
recommended improvements.In order for this alternative to move forward,Orange County will be
r required to reallocate funds to increase their available budget from$1,500,000 to the desired scenario
estimate,presented in Tables 8-2 and 8-3.If design of the improvements were to begin in early 2014,
construction would be estimated to start in early 2015.
Alternative 2—Full Design of Improvements
This alternative includes development of a complete design package.Acquisition of any necessary
permanent easements should also be included in this alternative.Permitting,bidding,and
construction will be put on hold until additional funding can be secured.The permitting is put on hold
because permit approvals have limited durations and could expire before construction funding is
secured.This alternative will allow the County to make use of most of their currently available funds
to keep the project moving forward so that once the additional funding is made available,the project
can more quickly advance into permitting,bidding,and construction.Based on the cost presented in
Table 8-2,the full design is expected to cost less than$1,130,000. The cost will be less since
permitting would not be included in this phase.
Alternative 3—Preliminary Design of Improvements
This alternative includes development of preliminary design documents,which are assumed to be
around the 50 percent design stage.Final design,permitting,bidding,and construction will be put on
hold until additional funding can be secured.This alternative will allow the County to make use of
some of their available funding to keep the project moving forward so that once the additional funding
is made available,the project can more quickly advance.
The preliminary design is expected to include an additional data collection effort;which would include
survey and geotechnical investigation,followed by development of preliminary design drawings and
key technical specifications.Additional work could also be included such as preliminary coordination
with regulatory agencies anal public outreach.Land acquisition for the proposed pump station could
Writ" 8-5
19
Section 8 o Conclusions and Recommendations
be performed.However,it may not be appropriate to acquire permanent easements,if any are
required,based on the preliminary status of the design.
The cost to perform the preliminary design can be provided upon request,but can be assumed to be
less than the$1,130,000 identified in Table 8-2 for full design and permitting.
Alternative 4—Hold Project Indefinitely
This alternative puts the entire project on hold until additional funding can be secured by the County.
This alternative will result in the longest schedule,as no upfront design work will have been
completed.This alternative can also put the project at greater risk for significant changes as
development and roadway modifications could impact the proposed alignments,which could in turn
increase the cost of the project.
8.3.2 Recommendation
Based on the alternatives presented above,it is CDM Smith's recommendation that the County move
forward with Alternative 2,which includes full design of the recommended improvements,but
holding on the construction until additional funding can be secured.This alternative provides the
following benefits:
■ Avoids the need for an immediate reallocation of funds compared to Alternative 1.
■ Allows the County to make use of the funds that are currently available for the project,
compared to Alternative 4 and partially for Alternative 3.
■ Allows the County to acquire the necessary easements,if any are required,compared to
Alternatives 3 and 4. Al
■ Allows the County to continue moving the project forward,compared to Alternative 4.
Reduces the overall schedule compared to Alternatives 3 and 4.
■ Allows the County to move immediately into permitting,bidding,and construction once the
available funds are secured,compared to Alternatives 3 and 4.Being able to quickly implement
the infrastructure will be much more attractive to potential developers.
1
,
s-s h ;
/ 20
i
f
Table of Contents
Section 1 Introduction
1.1 Project Background and Objectives...............................................................................................................1-1
1.2 Project Area..............................................................................................................................................................1-1
1.3 Scope of Stud ..............................................1-2
1.4 Report Format........................................................................................................................................................1-3
Section 2 Water Demand and Wastewater Flow Projections
' 2.1 Land Use Assumption...:.......................................................................................................................................2-1
2.2 Water Demand Projections...... ....................................................................................................................2-3
2.3 Wastewater Flow Projections.....
2.4 Phasing and Summary.........................................................................................................................................2-5
Section 3 Evaluation of Existing Water Infrastructure within Eno EDD
3.1 Existing Infrastructure........................................................................................................................................3-1
3.2 Water Distribution System Evaluation.........................................................................................................3-1
3.2.1 Model Verification.....................................................................................................................................3-1
3.2.2 Model Set-Up and Evaluation Criteria...........................................................................................3-1
3.2.3�Hydraulic Capacity Analysis. .3-3
3.2.4 Summary.......................................................................................................................................................3-4
Section 4 Proposed Wastewater Collection System within the Eno EDD
4.1 Existing Wastewater Collection System....................................................................................................4-1
4.2 Eno EDD Physical Features. ....................................................4-1
4.2.1 Roadways......................................................................................................................................................4-1
4.2.2 Hydrography...............................................................................................................................................4-2
4.2.3 Topography...........................................................
....................................................................................................4-4
4.3 Design Criteria........................... ..................... 4-4
4.3.1 Priority Service Areas..........................................................................................................................
.....4-4
4.4 Proposed Wastewater System..........................................................................................................................4-5
4.4.1 Peaking Factor.............................................................................................................................................4-5
4.4.2 Gravity Sewer..............................................................................................................................................4-5
4.4.2.1 Pipe Depth Analysis................................................................................. . .............................4-5
4.4.2.2 Pipe Capacity.............................................................................................................................4-10
4.4.3 Eno EDD Pump Station............................................ .......................................................................4-12
4.4.3.1 Pump Station Location..........................................................................................................4-12
4.4.3.2 Pump Station Capacity...........................................................................................................4-13
4.4_.4 Force Main.................................................................................................................................................4-13
th i
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' 21 �
Table of Contents Eno Economic Development District Water and SewerSystem Project—Draft Master Plan Report
�
°
�
�
|.Section 5 Conveyance tm City nK Durham's Wastewater Collection System �
5.1 Eno 8DD Force Main Discharge Alternatives............................................................................................S'1 �
5.1.1 Alternative Discharge Locatiouu--.__------------_-----------S'1
5.12lotmrbuanTransfer Considerations................................................................................................S'3 �
5.2 Hydraulic Model Set-Up......................................................................................................................................5'3 �
5.3.1 Estimated Peak Hour Design Flows from Eno EDD...................................................................5'3 �
52.2 Eno and EUocbo Creek UutfaD-Mode Set-Up................................................................................5'4 �
5.2.3 Mud Creek OutbaD Model Set-Up........................................................................................................5~& �
�6 �
5.3 Capacity Analysis..................................................................................................................................
� 5.3.1 Eno 8ntbd ...................................................................................................................................................S'6 �
5.8'2 8Derbe Creek Umdtall...............................................................................................................................G-6 �
5.33 Mud Creek OntbaD...................................................................................................................................S'6
5,4 Additional Hydraulic Considerations.......................................................................................................S'7 �
Section 6 Engineers Opinion wf Probable Construction Cost
6.1 Construction Cost Assumptions......................................................................................................................f-1 -
62 Projections Unit Cuutoto future Values......................................................................................................6~2 �
63 Opinion uf Probable Construction Cost......................................................................................................6-2 �
�
�
Section 7 Permit Requirements �
! 7'1 Construction Cost Aonuzupto�s-------------~.----_-_~.---_--_-------.7�. �
7� /�tbor�a�mutn Construct—_~..._--.----------.---_--- .............................7-1 �
7.3 Nationwide Permit/Water Quality Certification...................................................................................7-1 �
1.4 Sediment and Erosion Control Plan..............................................................................................................7-2
7'2 �
1.5 F��Lake y0�riant��uoagenzeutStrategy.---------------_--------_-----.
73 �N
1.6 8oddioQStandards Poruz�---_---_--'__—__-_--_--__--_---' '
7�3 �
1.7 A�OoolbyDeQatru�mu'__—_---------------------------'' �
7'3
�.8 NCDO�—__—_—'_--_------~~~-''^~—~~---'--'-^------~---'-----' �
. �
� 7-�
1.9 RaDroud..-..._..~.-...~..--~...~''~~'^~-~^--''--^^'---'----^-------''
7'� �
7.18 MicoDu00000Cuno�outkxn---.-.-...-~---_-----------'_-----~----.
. �
Section 8 Conclusions and Recommendations
O'1 -
9.1 Conclusions.............................................................................................................................................................. x�
�� �
8.2 Cost Bedumdouo0y�oun-----._--_---------'~--------'-------~------
8-5 �
8.3 Recommendations................................................................................................................................................ �
A.3'1 Alternatives..............................................................................................................................................................8'5 4N
B-6
�
9.3'2 Recommendation.................................................................................................................................................. mN
� ~
~» |
Appendices
ces �
r`��3����|
rr �
�
�
Appendix'&-Capacity Analysis Figures �
uN |
~ i
uN
With �
�
22
Table of Contents• Eno Economic Development District Water and Sewer System Project—Draft Master Plan Report
List of Tables
Table2-1 Eno EDD Acreage by Future Land Use..............................................................................................2-1
Table 2-2 Water Demand Factors.................,
Table 2-3 Demand and Flow Factors based on Parcel Area(Low Scenario)........................................2-4
Table 2-4 Demand and Flow Factors based on Parcel Area(Mid Scenario).........................................2-4
Table 2-5 Demand and Flow Factors based on Parcel Area(High Scenario).......................................2-4
Table2-6 Water Demand Factors...........................................................................................................................2-5 i
Table 2-7 Summary of Avg.Day Water Demand&Wastewater Flow Projections.............................2-6
Table 3-1 Summary of Demand along US 70 Transmission Main in Orange County........................3-2
Table 3-2 Minimum Pressure along Existing Water Transmission Main in Eno EDD......................3-3
Table 3-3 Velocity,Headloss,and Fire Flow along Existing Water Transmission
Maino Eno$DD......................................................................................................................................3-4
Table 4-1 Depth of Cav�r. .4-10
Table4-=2 Pipe Diameters........................................................................................................................................4-12
r
Table 5-1 Summary of peak Flows for Hydraulic Modelling.......................................................................5-3
Table 6-1 Opinion of Probable Construction Cost-Low Scenario.......................... 6-4
Table 6-2 Opinion of Probable Construction Cost-High Scenario............................................................6-5
Table 6-3 Individual Component Casts-Low Scenario................... ... 6-6
Table 6-4 Individual Component Costs-High Scenario...............................:.................................................6-7
Table 8-1 Summary of Avg.Day Water and Demand and Wastewater Flow Projections...............8-1
' Table 8-2 Opinion of Probable Construction Cost-Low Wastewater Flow Scenario.......................8-3
Table 8-3 Opinion of Probable Construction Cost-High Wastewater Flow Scenario......................8-4
r .
r
List of Figures
rFigure 2-1 Eno EDD Proposed Future Landuse..................................................................................................2-2
Figure 2-2 Future Average Day Water Demand Projection Scenarios......................................................2-7
rFigure 4-1 Eno EDD Physical Features...........................................................................................................,.......4-3
rFigure 4-2 Old Autumnwood Drive at Rhodes Creek.....:.................................................................................4-2
r Figure 4-4 Eno EDD Priori Service Areas.........................................................................................................4-7
................................................................4-6
Fig ure 4-3 Eno EDD Elevation Profile...........................................
Figure 4-5 Eno EDD Gravity Sewer System Pipe Alignments.......
r Figure 4-6 Eno EDD Gravity Sewer System Contributing Areas...............................................................4-11
r Figure 4-7 Eno EDD Proposed Wastewater System.......................................................................................4-14
Figure 5-1 Eno EDD Force Main Discharge Alternatives................................................................................5-2
Figure 5-2 Eno EDD Modeled Pipes in the Eno,Ellerbe Creek and Mud Creek Outfalis....................5-5
rFigure 6-1 Eno EDD Allocated Component Costs-Low Scenario................................................................6-8
rFigure 6-2 Eno EDD Allocated Component Costs=High Scenario...............................................................6-9
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