HomeMy WebLinkAboutAgenda - 02-19-2013 - 7cORANGE COUNTY
BOARD OF COMMISSIONERS
ACTION AGENDA ITEM ABSTRACT
Meeting Date: February 19, 2013
Action Agenda
Item No. 7 -c
SUBJECT: Jordan Lake Allocation Process and Requirement
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 (Jordan Lake
Partnership Potable Water
Interconnection Study Phase 2-
Hydraulic Modeling Proposal
2. Preliminary Conceptual Cost
Sharing Approach
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 on how to distribute via infrastructure 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 requests for a State Department
of Natural Resources (DENR) water resource allocation from Jordan Lake. Over the last two
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, the Jordan Lake
Partnership's engineering consultant, 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 one million gallons per
day (mgd) and will likely be asking for a similar but additional three 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. The engineer
study will be necessary and supportive of the Orange County Jordan Lake allocation
application. The Orange County share of the study cost is $49,000.
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. Consider the request in the upcoming budget deliberations.
3
ATTACHMENT 1
MUN MD S&IWM
Environmental Eingin s & Scileintists
Hazen and Sawyer, P.C.
629 Green Valley Road
Suite 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 IDs on the map from our December 1, 2011, technical memorandum.
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 OWASA - Hillsborough Model
1. 1 Analyze Cary- Durham Interconnections ( #6, 7, 9) 368 $ 57,280
1 Gather information and interview Partners'staff
2 Update Cary model infrastructure
3 Update Durham model infrastructure
4 Combine Durham and Cary models & add interconnection details
5 Check model calibration near interconnections
6 Determine sustainable flow from Cary to Durham with existing interconnections (EPS)
7 Identify improvements for sustained flow of 10 mgd from Cary to Durham (EPS)
8 Determine sustainable flow from Durham to Cary with existing interconnections (EPS)
9 Identify improvements for sustained flow of 7 mgd from Durham to Cary (EPS)
10 Present preliminary results
11 Prepare report chapter that incorporates review comments
12 QC
1. 2 Analyze Durham - OWASA Interconnections ( #25, 26, 27) 368 $ 51,840
1 Gather information and interview Partners'staff
2 Combine OWASA - Hillsborough model with Durham -Cary model and add interconnection details
3 Check model calibration near interconnections
4 Determine sustainable flow from Durham to OWASA with no flow to Chatham (EPS)
5 Determine flow from Durham to OWASA with 4 mgd point load to Chatham (at #10)
6 Identify improvements for 7 mgd from Durham to OWASA +4 mgd to Chatham (at #10)
7 Identify improvements for 9 mgd from Durham to OWASA inc 2 mgd to Orange +4 mgd to Chatham
8 Determine sustainable flow from OWASA to Durham with no flow to Chatham
9 Present preliminary results
10 Prepare report chapter that incorporates review comments
11 QC
1. 3 Analyze Flow between Cary and OWASA through Durham (#6,7,9,25,26,27) 256 $ 39,360
1 Gather information and interview Partners'staff
2 Identify improvements for sustained 5 mgd from Cary through Durham to OWASA off peak
3 Determine sustainable flow from OWASA through Durham to Cary
4 Present preliminary results
5 Prepare report chapter that incorporates review comments
6 QC
1031-456 Potable Water Interconnection Study HAZENAND SA�WIi,R,
t,nv irrturorirrei`tm k!:ngineerr & Semnu usts
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 3
Part Project Task Description
1.4 Analyze Hillsborough- Durham Interconnection ( #16)
1 Gather information and interview Partners' staff
2 Test three pumps and check model calibration at connection point
3 Identify improvements for 2 mgd from Durham to Hillsborough
4 Identify improvements for 4 mgd from Durham to Hillsborough including 2 mgd to Orange County
5 Identify improvements for 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)
1 Gather information and interview Partners' staff
2 Update Orange Alamance model and add to combined model
3 Check model calibration near interconnections
4 Identify improvements for 0.75 mgd from Hillsborough through Orange Alamance to Buckhorn EDD
5 Identify improvements for 0.75 mgd from Hillsborough directly to Buckhorn EDD
6 Present preliminary results
7 Prepare report chapter that incorporates review comments
8 QC
Part 1 Totals
61
Hours Fee
248 $ 37,840
208 $ 28, 960
1,448 $ 215,280
f,u'u °a irrturorir i`u�xrV
Engineers & S¢or wilts
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 4
Part Project Task Description
2 Add Raleigh, Apex, Holly 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, 31 2, & 1)
1 Gather information and interview Partners'staff
2 Update Apex model infrastructure
3 Add Raleigh and Apex to model from Part 1 and add details at interconnections
4 Check model calibration at interconnections
5 Analyze Cary emergency interconnections with 42" pipe out of service
6 Analyze Cary emergency interconnections with CAWTF out of service
7 Present preliminary results
8 Prepare report chapter that incorporates review comments
9 QC
2. 2 Analyze Apex -Holly Springs interconnection ( #21, 5, 1, 2, 3, 4)
1 Gather information and interview Partners'staff
2 Add new Holly Springs model to core model and add details at interconnections
3 Identify more efficient locations for current pump station
4 Identify improvements for 2 mgd to Holly Springs + 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)
1 Gather information and interview Partners'staff
2 Add North Chatham County model to core model and add details for connecting pipes
3 Determine flow from Cary through Apex to Chatham County
4 Determine flow from Chatham County through Apex to Cary
5 Present preliminary results
6 Prepare report chapter that incorporates review comments
7 QC
Eel
Hours Fee
400 $ 58,000
240 $ 35,280
240 $ 35,280
1031-456 Potable Water Interconnection Study HAZENAND SA�WIi,R,
t,nv irrturorirrei`tm k!:ngineerr & Semnu usts
7
Jordan Lake Partnership
Phase 2 Hydraulic Modeling Proposal
October 26, 2012
Page 5
Part Project Task Description Hours Fee
2.4 Analyze flow from Raleigh through Cary to Holly Springs and Apex ( #46, 50, 4, 5) 232 $ 34,160
1 Gather information and interview Partners'staff
2 Update model at Cary's proposed connections to Holly Springs transmission main
3 Determine flow from Raleigh through Cary to Holly Springs
4 Determine flow from Raleigh through Cary to Apex
5 Identify improvements to increase above flows
6 Present preliminary results
7 Prepare report chapter that incorporates review comments
8 QC
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 Determine flow from Durham through Cary to Apex
3 Identify improvements to increase above flows
4 Present preliminary results
5 Prepare report chapter that incorporates review comments
6 QC
2. 6 Analyze Cary- Durham - Raleigh interconnections 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 models to 2060 demand from Triangle Regional Water Supply Plan
3 Identify improvements for 10 mgd from Durham to Cary /Apex
4 Identify improvements for 10 mgd from Raleigh to Cary /Apex
5 Identify improvements for 10 mgd from Durham and Raleigh to Cary /Apex
6 Identify improvements for 17 mgd from Durham to Cary /Apex
7 Identify improvements for 17 mgd from Raleigh to Cary /Apex
8 Identify improvements for 17 mgd from Durham and Raleigh to Cary /Apex
9 Determine flow from Harnett County through Holly Springs to Cary /Apex
10 Determine flow from Harnett County through Holly Springs and Cary /Apex to Raleigh
11 Determine flow from Harnett County through Holly Springs and Cary /Apex to Durham
12 Determine flow from Harnett County through Holly Springs, Cary /Apex and Durham to OWASA
13 Present preliminary results
14 Prepare report chapter that incorporates review comments
15 QC
Part 2 Totals 1,804 $ 266,040
GRAND TOTALS 3,252 $ 481,320
1031-456 Potable Water Interconnection Study HAZENAND SA�WIi,R,
t,nv irrturorirrei`tm k!:ngineerr & Semnu usts
E:]
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 HAZENAND SA�WIi,R,
t,nv irrturorirrei`tm k!:ngineerr & Semnu usts
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 jcruickshank @hazenandsawyer.com.
CC: Michael Wang, P.E.
Christopher Belk, P.E.
Sincerely,
f,u'u °a irrturorir i`u�xrV
Engineers & S¢or wilts
01
ATTACHMENT 2
Jordan Lake Partnership
Potable Water Interconnection Study
Phase 2: Hydraulic Modeling Proposal
Preliminary Conceptual Cost Sharing A pp r oac h for O- S�S PURPOSES ON- Potential S -- e and Cost S h �_ _- -
Based on H &S Memo, 10/26/2012
Drafted on 10/29/2012
10
Task
Description
Cost
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cost per
Participant
(after base
subtracted)
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
x
x
x
x
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
x
x
x
x
x
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
x
x
x
x
$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
x
x
x
$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
x
$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
x
x
x
x
x
$9,860
$9,860
$9,860
$9,860
$9,860
$0
$0
$0
$0
$9,860
$0
2.2
Analyze Apex -Holly Springs interconnection ( #21, 5, 1, 2, 3, 4)
$35,280
x
x
x
x
x
x
$5,998
$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
x
x
x
$9,996
$9,996
$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
x
x
x
x
$7,259
$7,259
$7,259
$0
$0
$0
$0
$0
$7,259
$7,259
$0
2.5
Analyze flow from Durham to Apex ( #1, 2, 3, 4, 6, 7, 9)
$30,600
x
x
x
x
x
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, 2
$72,720
x
x
x
x
x
x
$12,362
$12,362
$12,362
$12,362
$12,362
$0
$0
$0
$0
$12,362
$0
Base Participation
$72,198
15%
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
0
0 $83,342
$83,342
$76,809
$66,087
$17,941
$24,560
$7,220
$20,476
$51,641
$49,901
$481,320