HomeMy WebLinkAboutAgenda - 03-07-2013 - 7cORANGE COUNTY
BOARD OF COMMISSIONERS
ACTION AGENDA ITEM ABSTRACT
Meeting Date: March 7, 2013
Action Agenda
Item No. 7 -c
SUBJECT: Jordan Lake Allocation Process and Engineering Study
DEPARTMENT: Planning and Inspections, PUBLIC HEARING: (Y /N) No
Environment, Agriculture, Parks and
Recreation (DEAPR)
ATTACHMENT(S):
1. October 26, 2012 Letter from
Hazen & Sawyer (re: Jordan Lake
Partnership Potable Water
Interconnection Study Phase 2:
Hydraulic Modeling Proposal
2. Preliminary Conceptual Cost
Sharing Approach
1
INFORMATION CONTACT:
Craig Benedict, Planning Director,
919- 245 -2592
Dave Stancil, Director, DEAPR,
919- 245 -2522
Kevin Lindley, Staff Engineer, Planning
Department, 919 - 245 -2583
Tom Davis, Water Resources Coordinator,
DEAPR, 919 - 245 -2513
PURPOSE: To consider adding funds in this year's budget process for utility engineering
study /analysis regarding the infrastructure distribution program for future water allocations from
Jordan Lake.
BACKGROUND: Orange County has been participating in the Jordan Lake Partnership, a
group of regional local governments and utilities coordinating their requests for a North Carolina
Department of Natural Resources (DENR) water resource allocation from Jordan Lake. Over
the last 2 years, these various entities have collaborated to create consistent standards,
terminology, projection methodologies, and options as the upcoming requests for long term
water needs are developed. Although the demands and supplies of Jordan Lake and other
water supplies have been comprehensively evaluated, the applications are associated but
reviewed independently with each local government/utility by DENR.
Various aspects of water supply modeling are employed including how to transmit water from
the supply (i.e. lake or reservoir, etc.) to the demand area (i.e. populations and businesses).
Therein lies the purpose of this abstract item. Hazen and Sawyer has proposed Phase II of the
Jordan Lake Interconnection Study which will analyze existing pipe infrastructure and necessary
pipe sizes to accommodate a regional system of water transmission among the various
applicants. This is necessary since water supply intakes on Jordan Lake are limited so future
water transmission will have to be `wheeled' around different `shared' pipe networks.
Orange County presently has level II (reserve) raw water allocation of 1 million gallons per day
(mgd) and will likely be asking for a similar but additional 3 mgd to support the development
needs of the three economic development districts (EDDs) — Eno (partnership with City of
Durham), Hillsborough Area (partnership with Town of Hillsborough) and Buckhorn /Mebane
(partnership with the City of Mebane). Although Orange County has formal agreements with the
City of Durham and City of Mebane for these EDD zones being serviced, the supply allocations,
if approved, could be ceded to the County's partners to convert raw water into `finished' water.
Over the next few months, Orange County will continue to examine the best available options to
secure future public water resources for the County. This engineering study will be necessary
and supportive of the Orange County Jordan Lake allocation application. The Orange County
share of study cost is $49,901.
There will be a full discussion of the Jordan Lake Allocation application process at the March
12th BOCC Work Session.
FINANCIAL IMPACT: These additional funds will be requested in the upcoming 2013 -14
budget.
RECOMMENDATION(S): The Manager recommends the Board:
1. Support the concept of the Jordan Lake Allocation; and
2. Add the request to the upcoming 2013 -14 budget.
K
ATTACHMENT 1
MUN AND SAWYER
Environmental Engineers & Scientists
Hazen and Sanyer, P.C.
629 Green Valley Road
SLite 200
Greensboro, NC 27408
336-292 -7490
Fax: 336 - 292-5614
October 26, 2012
Mr. Sydney Paul Miller, P.E.
Water Resources Engineer
Department of Public Works and Utilities
Town of Cary
400 James Jackson Ave.
Cary, NC 27513
Re: Jordan Lake Partnership
Potable Water Interconnection Study
Phase 2: Hydraulic Modeling Proposal
Dear Mr. Miller:
Hazen and Sawyer is pleased to submit this updated proposal for hydraulic modeling of potable
water interconnections among the Jordan Lake Partners. This version of the proposal responds to
the discussion at the partner's meeting October 16, 2012.
The purpose of this study is to develop a regional approach for planning interconnections that
increase the reliability and sustainability of drinking water by using resources cooperatively.
Our December 1, 2011, technical memorandum summarized Phase 1 of the project. This summary
tabulated each partner's water facilities, documented existing interconnections and evaluated
opportunities for improved interconnections. The key deliverable was a map showing all the
partners' water systems, pressure zone boundaries and the interconnection locations.
Our December 20, 2011, technical memorandum outlined the next steps for evaluating
interconnections by providing a modeling overview; an explanation of issues involved with
combining and updating models; and recommendations for moving forward.
This updated proposal for the project's second phase integrates interconnection modeling requests
by the partners and their feedback on the scope and cost estimates from previous proposals.
Interconnections will be evaluated for sustained transfers using multi -day extended period
simulations. Predicted hydraulic performance will be compared with design criteria for velocities,
pressures and tank water levels. Calibration tasks will focus on existing interconnections; broader
calibration will be recommended if a partner's model is unable to match field measurements.
The following pages outline the requested modeling projects. Part 2 builds on Part 1 so that tasks
are not repeated. Projects that involve wheeling water through an intermediate system may involve
the same interconnections as direct transfer projects, but these are separate modeling scenarios
that produce different flows and pressures. The numbers included in each project description refer
to the interconnection I Ds on the map from our December 1, 2011, technical memorandum.
M
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 2
Scope of Services
Part Project Task Description Hours Fee
1 Build core model of Cary and Durham, then add 0WAS4Hillsborough Model
1. 1 Analyze Cary- Durham interoDnnections(#6, 7, 9) 368 $ 57,280
1 Other information and interview Partners' staff
2 Update Cary model infrastructure
3 Update Durham model infrastructure
4 Combine Durham and Crary models & add interconnection details
5 Check model calibration near interconnections
6 Determine sustainable flow from Cary to Durhamwith existing interconnections(EPS)
7 Identify i mprovementsfor sustai ned flow of 10 mgd from Cory to Durham (EPS)
8 Determine sustainable flow from Durhamto Corywith existing interconnections(EPS)
9 Identify i mprovementsfor sustained flow of 7 mgd from Durham to Cory (EP)
10 Present preliminary results
11 Prepare report chapterthat incorporates review comments
12 QC
1.2 Analyze Durham- OWAS4lnterconnections(#25, 26, 27) 368 $ 51,840
1 Other information and interview Partners' staff
2 Combine ONAS4- Hllsborough model with Durham -Cary model and add interconnection details
3 Check model calibration near interconnections
4 Determine sustainable flow from Durham to ONAS4 with no flow to Chatham (EPS)
5 Determine flow from Durham toONAS4with4 mgd point load to Chatham (at #10)
6 Identify i mprovementsfor 7 mgd from Durham to ONAS4 +4 mgd to Chatham (at #10)
7 Identify i mprovementsfor 9 mgd from Durham to ONAS4 inc2 mgd to Orange +4 mgd to Chatham
8 Determine sustainable flow from O7NASA to Durham with no flow to Chatham
9 Present preliminary results
10 Prepare report chapter that incorporates review comments
11 QC
1.3 Analyze Row between Cary and OWAS4through Durham (#6, 7, 9, 25, 26, 27) 256 $ 39,360
1 Other information and interview Partners' staff
2 Identify improvements for sustained 5 mgd from Crary through Durham to ONAS4 off peak
3 Determine sustainable flow from ONAS4 through Durham to Cory
4 Present preliminary results
5 Prepare report chapter that incorporates review comments
6 QC
1031 -456 Potable Water Interconnection Study UVENAND SAMU
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 3
Part Project Task Description Hours Fee
1.4 Analyze Hillsborough- Durhamintercamection (#16) 248 $ 37,840
1 Other information and interview Partners' staff
2 Test three pumps and check model calibration at connection point
3 Identify improvementsfor 2 mgd from Durham to Hillsborough
4 Identify i mprovementsfor 4 mgd from Durham to Hi I Isborough i nd udi ng 2 mgd to Orange County
5 Identify improvementsfor 1 mgd to Durham
6 Present preliminary results
7 Prepare report chapter that incorporates review comments
8 QC
1.5 Analyze flow from Hillsborough to Orange County (#17,22) 208 $ 28,960
1 Other information and interview Partners' staff
2 Update Orange AI arnance model and add to combi ned model
3 Check model calibration near i nterconnecti ons
4 Identify improvementsfor 0.75 mgd from HlIsborough through Orange Alarnance to Buckhorn ®D
5 Identify i mprovementsfor 0.75 mgd from Hl Isborough di rectly to Buckhorn ®D
6 Present preliminary results
7 Prepare report chapter that incorporates review comments
8 QC
Part 1 Totals 1,448 $215,280
1031 -456 Potable Water Interconnection Study RVENAND SAMU
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Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 4
Part Project Task Description Flours Fee
2 Add FElei gh, Apex, Fol ly Springs and North Chatham to model from Part 1
2.1 Analyze Cary emergency interconnections(#9, 6, 7, 47, 43, 32, 42, 44, 44, 45, 46, 50, 4, 3, 2, & 1) 400 $ 58,000
1 Other information and interview Partners' staff
2 Update Apex model infrastructure
3 Add Fbleigh and Apex to model from Part 1 and add detalsat interconnections
4 Check model calibration at interconnections
5 Analyze Cary emergency i nterconnecti onswi th 42" pipe out of service
6 Analyze Cary emergency i nterconnecti onswi th CAWTF out of service
7 Present preliminary results
8 Prepare report chapter that incorporates review comments
9 oc
2.2 Analyze Apex- Fblly!3p►ingsinteroonnection (#21, 5,1, 2, 3,4) 240 $ 35,280
1 Other information and interview Partners' staff
2 Add new Holly Springsmodel to core model and add detalsat interconnections
3 Identify more effi dent locationsfor current pump station
4 Identify i mprovementsfor 2 mgd to Holly Ipri ngs +3 mgd to Apex +7 mgd to Cary from Harnett
5 Determine sustainable flow from Apex to Holly Springs
6 Present preliminary results
7 Prepare report chapter that incorporates review comments
8 QC
2.3 Analyze flow between Cary and Chatham County (#48,1, 2, 3, 4) 240 $ 35,280
1 Other information and interview Partners' staff
2 Add North Chatham County model to core model and add detailsfor connecting pipes
3 Determine flow from Cary through Apex to Chatham County
4 Determine flow from Chatham County through Apex to Crary
5 Present preliminary results
6 Prepare report chapter that incorporates review comments
7 QC
1031 -456 Potable Water Interconnection Study RVENAND SAMU
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7
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 5
Part Project Task Description Flours Fee
2.4 Analyze flow from Raleigh through Cary to Flol ly Sp ingsand Apex (#46,50,4,5) 232 $ 34,160
1 Gather information and interview Part ners' staff
2 Update model at Cary'sproposed connections to Holly 1pringstransmission main
3 Determine fl ow from F;bl ei gh th rough Cary to Hol I y 1pri ngs
4 Determine fl ow from F;bl ei gh th rough Cary to Apex
5 Identify i mprovementsto i ncrease above fl ows
6 Present preliminary results
7 Prepare report chapter that incorporates review comments
8 CSC
2.5 Analyze flow from Durham to Apex (1, 2, 3, 4, 6, 7, 9) 196 $ 30,600
1 Gather information and interview Partners' staff
2 Determi ne fl ow from Durham through Cary to Apex
3 Identify i mprovementsto i ncrease above fl ows
4 Present preliminary results
5 Prepare report chapter that incorporates review comments
6 OC
2.6 Analyze Cary- Durham- Fdeigh interoamections in 2060 (#9, 6, 7, 47, 43, 32, 42, 44, 45, 46, 25, 26, 27) 496 $ 72,720
1 Gather information and interview Partners' staff
2 Adjust core modelsto2060demand from Triangle Fegional Water SApply Ran
3 Identify improvementsfor 10 mgd from Durham to Cary /Apex
4 Identify improvementsfor 10 mgd from Fbeigh to Cary /Apex
5 Identify improvementsfor 10 mgd from Durham and Fbleigh to Cary /Apex
6 Identify improvementsfor 17 mgd from Durham to Cary /Apex
7 Identify improvementsfor 17 mgd from Fbeigh to Cary /Apex
8 Identify improvementsfor 17 mgd from Durham and Fbleigh to Cary /Apex
9 Determine flow from Harnett Cbuntythrough Holly 1�pringsto Cary /Apex
10 Determine flow from Harnett Cbunty through Holly Epringsand Cary /Apex to Fbleigh
11 Determine flow from Harnett Cbunty through Holly Epringsand Cary/Apex to Durham
12 Determine flow from Harnett Cbunty through Holly Spri ngs, Cary /Apex and Durham to ONAS4
13 Present preliminary results
14 Prepare report chapter that incorporates review comments
15 OC
Part 2 Totals 1,804 $266,040
GRANDTOTALS 3,252 $481,320
1031 -456 Potable Water Interconnection Study UVENAND SAMU
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Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 6
Deliverables
The deliverable for this project will be a single report with chapters describing findings for each
interconnection project. The report will be provided in electronic format.
Project Team
The Hazen and Sawyer team for this project will include:
Project Director: Michael Wang, PhD, P.E.
Project Manager: Jeffrey R. Cruickshank, P.E.
Modelers:
Crystal Broadbent, P.E
Todd Davis, P.E.
Ricardo Espinosa, P.E.
Megan Roberts, P.E.
Wayne Zhang, PhD, P.E.,
Field Coordinator:
Kevin Widderich, E.I.
Compensation:
Compensation for services rendered shall be based on a Direct Labor Multiplier of 3.15 applied to
labor costs of the cumulative hours charged to the project by each employee providing services.
Table 1 depicts current direct salary rates for various staff positions expected to be involved with
this project. Actual rates will be based upon labor costs for the individuals working on the project at
the time services are rendered, and may differ from those shown in the table.
Table 1 — Direct Salary Rates
Position
Direct Salary Rates
Vice President
$75
Senior Associate
$67
Associate
$48
Principal Engineer
$44
Engineer/Field Coordinator
$40
The Direct Labor Multiplier will be applied to actual labor costs and will include all overhead, profit,
travel, modeling software and computer costs, word processing, secretarial, telephones, faxes, etc.
It shall be understood the aggregate cost ceiling established for this project shall not be exceeded.
If a project takes fewer hours than estimated, the fee will be less than that shown. If the costs for
another project overrun that project's cost ceiling, remaining fees from other projects may be used.
1031 -456 Potable Water Interconnection Study UVENAND SAMU
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9
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 7
Schedule:
We estimate completion within 12 months of authorization to proceed. Invoicing will not begin
before July 1, 2013.
Please call me at (336) 292 -7490 x81720 if you have any questions regarding this proposal, or
email me at jruickshank@hazenandsawyer.com.
Sincerely,
HAZEN AND SAWYER, P.C.
P/
z
Jeffrey R. Cruickshank, P.E.
Senior Associate
CC: Michael Wang, P.E.
Christopher Belk, P.E.
1031 -456 Potable Water Interconnection Study UVENAND SAMU
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ATTACHM ENT 2
Jordan Lake Partnership
Potable Water Interconnection Study
Phase 2: Hydraulic Modeling Proposal
Preliminary Conceptual Cost Sharing Approach for DISCUSS -10N PURPOSES ONLY Pmen-11al Scqve and Cos-, Sharing
Based on H&S Memo, 10/26/2012
Drafted on 10/29/2012
10
Task
Description
Cost
a
cost per
E o 8 Participant
E .2 At fb (after base
6 subtracted)
I =0
t k
Cary
Apex
Durham
OWASA
Hillsborough
Chatham
County
Pittsboro
Holly
Springs
Raleigh
Orange
County
1.1
Analyze Cary-Durham Interconnections (#6, 7, 9)
$57,280
x
............ ............ ........... ............ ............ ............
............ ........... ............ ............ ............ - - - $9,738
$9,738
$9,738
$9,738
$9,738
$0
$0
$0
$0
$9,738
$0
1.2
Analyze Durham-OWASA Interconnections (#25, 26, 27)
$51,840
x
$7,344
$7,344
$7,344
$7,344
$7,344
$0
$7,344
$0
$0
$0
$7,344
1.3
Analyze Flow between Cary and OWASA through Durham (#6, 7, 9, 25, 26, 27)
$39,360
x
"Uz $8,364
$8,364
$8,364
$8,364
$8,364
$0
$0
$0
$0
$0
$0
1.4
Analyze Hillsborough-Durham Interconnection (#16)
$37,840
x
a
0 Nffl Nffl ZZ
��:Zl -Z-110 'N"" $10,721
$0
$0
$10,721
$0
$10,721
$0
$0
$0
$0
$10,721
1.5
Analyze Flow from Hillsborough to Orange County (#17, 22)
$28,960
x
IN III IN 01,111",
R-- $24,616
$0
$0
$0
$0
$0
$0
$0
$0
$0
$24,616
2.1
Analyze Cary emergency interconnections (#9, 6, 7, 47, 43, 32, 42, 44, 45, 46, 50, 4, 3, 2, & 1)
$58,000
x
$9,860
$9860
$9860
$9860
$9860
$0
$0
$0
$0
$9,860
$0
2.2
Analyze Apex -Holly Springs interconnection (#21, 5, 1, 2, 3, 4)
$35,280
X
N 10 $5,998
A
$5,998
$5,998
$5,998
$5,998
$0
$0
$0
5,998
$0
$0
2.3
Analyze flow between Cary and Chatham County (#48, 1, 2, 3, 4)
$35,280
x
$9996
$9996
$9,996
$0
$0
$0
$9,996
$0
$0
$0
$0
2.4
Analyze flow from Raleigh through Cary to Holly Springs and Apex (#46, 50, 4, 5)
$34,160
x
$7,259
$7,259
$7,259
$0
$0
$0
$0
$7,259
$7,259
0
2.5
Analyze flow from Durham to Apex (#J., 2, 3, 4, 6, 7, 9)
$30,600
x
$5,202
$5,202
$5,202
$5,202
$5,202
$0
$0
$0
$0
$5,202
$0
2.6
Analyze Cary -Durham-Raleigh interconnections in 2060 (#9, 6, 7, 47, 43, 32, 42, 44, 45, 46, 25,
$72,720
x
$12,362
$12,362
$12,362
$12,362
$12,362
$0
$0
$0
$0
$12,362
$0
Base Participation
$72,198
i'LINS,
x x x x x x x x x x $7,220
$7,220
$7,220
$7,220
$7,220
$7,220
$7,220
$7,220
$7,220
$7,220
$7,220
Total
$481,320
1 1 1 1 1 1
1 $83,342
$83,342
$76,809
$66,087
$17,941
$24,560
$7,220
$20,476
$51,641
$42221
$481,320