HaydenRhodes Aqueduct Capacity Study

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HaydenRhodes Aqueduct Capacity Study

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Create guidance document for CAP for long-term water resource planning ... Freeboard. Earthwork. Total cost $135.2 million without crossing modifications ... – PowerPoint PPT presentation

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Title: HaydenRhodes Aqueduct Capacity Study

1
Hayden-Rhodes AqueductCapacity Study

April 15, 2009
Stakeholder Work Group Meeting
Patrick Dent, P.E.
CAP Engineering Resources Supervisor

2
Increasing Hayden-Rhodes Capacity

Task
Complete a feasibility study to expand the
Hayden-Rhodes Aqueduct to 3600 cubic feet per
second (cfs)
Objective
Create guidance document for CAP for long-term
water resource planning
Take advantage of regular maintenance activities
and capital replacements to increase system
capacity
Create a Master Plan sequencing CAP improvement
projects

3
Hayden-Rhodes Aqueduct
The Hayden-Rhodes Aqueduct is the section of
canal between the Colorado River and Salt Gila PP
4
Feasibility Study Scope

Identify and review alternatives for expansion of
major components to 3600 cfs
Canal Lining/Check Structures
Siphons
Tunnels
Pumping Plants
Drainage and Transportation Crossings
Provide preliminary cost estimates for capacity
improvements
Provide recommendations/priority for capacity
projects

5
Canal Lining

Lining Options
Line 21 slope
Vertical walls
New expanded cross-section
Surges Emergency Shutdowns
Contain (current design)
Spill (potential alternative)
Friction
Freeboard
Earthwork
Total cost 135.2 million without crossing
modifications

6
Lining Alternatives
7
Check Gates

Increase gate opening
Flow capacity of structure 6000 cfs
Additional height to contain surges/increased
canal volumes
Structural modifications
100K per structure

8
Siphons

Cunningham (CS01, 3300 cfs)
Spillway (1.8 million)
Centennial (CS06, 3100 cfs)
I-10 Bridges (15 million)
Steel liner
New secondary siphon (12.7 million)
Jack Rabbit Hassayampa (CS12 3400 cfs, CS13
3200 cfs)
Secondary siphons 600 cfs (6.2, 9.7 million)
Agua Fria (3500 cfs)
No modifications
New River (CS19, 3300 cfs)
Re-habilitate, tie-in old siphon (5.6 million)
Redundancy for users downstream of Lake Pleasant
Salt River (CS25, 3500 cfs)
Re-habilitate, tie-in old siphon (11.1 million)
Redundancy for users downstream of the Salt River

9
Tunnels

Burnt Mountain (3400 cfs)
Pressurized flow
Submergence of Check Structure
Required Lining Height
Secondary Tunnel (9.8 million)
Agua Fria (3400 cfs)
Tunnel Lining (3.0 Million)
Water Demands

10
Pumping Plants

No changes to structure of intakes or discharge
lines
No changes at Bouse PP
Impellers at Little Harquhala PP
4 Large units (7.0 Million)
67 cfs each
Motors and impellers at Hassayampa (8.2 million)
4 Large units (8.2 Million)
100 cfs each

Cost Summary
Pumping Plants
No changes (BSH)
Replace 4 Impellers (LHQ)
Replace 4 Units (HSY)
Siphons
Construct 3 New Siphons
Refurbish 2 Siphons
Tunnels
Construct New Tunnel
Modify Existing Tunnel
Canal
Raise Lining for 155 miles
Total Cost 230 million

12
Feasibility Study Summary

3600 cfs is Feasible
Flow depth in channel will be additional 2 to 2.5
feet
Increase Bouse, Little Harquahala and Hassayampa
pumping plants by 0, 250, 450 cfs respectively
Construct secondary siphons and tunnel(s)
Modify check gates, raise lining and address
aqueduct crossings
Total estimated cost 230 million
Costs estimated are for design and construction
only in 2008 dollars

13
Summary of Estimated Costs By Segment
14
Annual Capacity/Maintenance Matrix
Annual Capacity
Peak Flow Capacity
Service Factor
X

Maintenance Excellence Increased Capacity
15
Capacity Improvement Projects

Capacity improvements can be made with by
completing smaller individual projects
Not all projects need to be completed to begin
realizing system capacity benefits
Projects that increase seasonal peak capacity or
maintenance capacity will add to the total annual
capacity of the system

16
Project Priority List

Re-habilitation of New River Siphon (5.6
million)
Segment 3B (Waddell Canal to Salt Gila PP) (33.8
million)
Unit Modifications at Little Harquahala PP and
Hassayampa PP (15.2 million)
Construct Secondary Siphons at Centennial, Jack
Rabbit and Hassayampa (28.5 million)
Remaining Lining and Tunnel Projects (148.6
million)

17
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18
Questions

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