1

4300

0-03

6w-fn

008

Palm Beach CountyWater ResourcesTask Force

March 18, 2010

C-51 Reservoir

Feasibility StudyPhase 2A

Status Report

2

4300

0-03

6w-fn

008

Original Feasibility Study Concept

■ Joint Effort – Local Governments / SFWMD

■ Sponsored by 7 “Participating Utilities”● Palm Beach County● Broward County● Pompano Beach● Plantation● Sunrise● Fort Lauderdale● Hollywood

■ Other utilities in Study Area may benefit

3

4300

0-03

6w-fn

008

EAA LWDD

C-51 BASIN

REFUGE

ResevoirArea

Benefits 1. Environmental

restoration of estuary

2. Water Supply for LEC utilities

3. Water management flexibility

Original Feasibility Study Concept

4

4300

0-03

6w-fn

008

Conveyance Alternative 1

Task 2b – Lake Worth Drainage District

5

4300

0-03

6w-fn

008

Task 2b – Everglades Agricultural Area

Conveyance Alternative 2

6

4300

0-03

6w-fn

008

Other County Task Forces / Stakeholder Review

7

4300

0-03

6w-fn

008

“Key Decisions”

■ Largely public policy choices requiring decisions

■ Beyond the purview of public water utilities

8

4300

0-03

6w-fn

008

Areas RecommendedFor Further Study

1. Update demand projections

2. Conveyance3. Permitting4. Environmental /

water quality5. Geotechnical

6. Full cost accounting

7. Legal / regulatory considerations

8. Governance / financing

9. Schedule10.Offsets

9

4300

0-03

6w-fn

008

Participating Utilities Funded The Feasibility Study

Phase 2A – Scope of Work

Task 1 – Update Raw Water Demand Projections

Task 2 – Evaluate Two Water Conveyance Alternatives – LWDD and EAA

Task 3 – Compare L-8 Reservoir Geotechnical and Hydrologic Conditions to possible C-51 Reservoir location

Task 4 – C-51 Reservoir Cost-Effectiveness Sensitivity Analysis

10

4300

0-03

6w-fn

008

Task 1: Total Demand Required From C-51

Item 2030

Amount needed by:*

Broward County (mgd) 45 - 66

Southern Palm Beach County (mgd) 36 - 41

Florida Power & Light (mgd) 25

Total Water Needed (mgd) 106 -132

Amount of Water Available from C-51 Reservoir (mgd) 120

Water Demand as % of Water Available from C-51 Reservoir 88 -110%

* Based upon preliminary modeling of wellfields. Represents amount required to comply with RWAR.

Amount Needed Based Upon Utility Survey and Preliminary Modeling

11

4300

0-03

6w-fn

008

Task 2a – Reservoir Can Meet Intent of LEC Regional Water Availability Rule

■ It can be considered an AWS project and/or a water resource development project

■ It captures stormwater and may offset additional demands

■ May provide the volume of water needed by utilities seeking additonal allocations without increasing volume or change timing of demands on the regional system

Because:

12

4300

0-03

6w-fn

008

Task 2a – Multiple Pathways for Rule Compliance via Certification

■ As a resource development project, SFWMD Governing Board could authorize offsets to allow use of the reservoir as a future AWS

■ As a water supply project, District reviews an application for an alternative water supply reservoir to provide offsets for additional withdrawals from the surficial aquifer

■ Reservoir can be a key component in achieving the offset requirements of the Regional Water Availability Rule

13

4300

0-03

6w-fn

008

Task 2b – Both Conveyance Alternatives Can Deliver Water from Reservoir to LEC Wellfields

■ Conveyance Alternative No. 1 – LWDD: ● Additional capital cost = $50 million● Annual O&M cost = $200,000

■ Conveyance Alternative No. 2 – EAA: ● Additional capital cost = $0 million● Annual O&M cost = $200,000

■ Water quantity and water quality analyses required for EAA route

■ Further analysis is particularly important to identify the potential impacts and benefits to Everglades restoration

14

4300

0-03

6w-fn

008

Task 3 – Hydrogeology Directly West of L-8 Reservoir May Be Favorable for Storing Water

■ Conclusion based on examining available data from District and from Palm Beach Aggregates’ engineering consultants

■ Geologic and hydrologic characteristics in area west of and adjacent to the existing L-8 Reservoir are similar to those of the L-8 Reservoir

■ Aquifer performance properties show a higher transmissivity in west area but still significantly lower than typical EAA conditions

15

4300

0-03

6w-fn

008

Task 3 – Hydrogeology Directly West of L-8 Reservoir May Be Favorable for Storing Water

■ Overall, west area likely to have favorablehydrogeologic characteristics: ● Isolate stored water within the reservoir ● Allow for very little seepage from outside the

reservoir ■ Final design of any new feature to the west of the

L-8 Reservoir will require: ● Further data collection● Site and performance analysis● Study anticipates adding a slurry wall ($15M)

16

4300

0-03

6w-fn

008

Task 4 – Cost Effectiveness Analysis Preliminary Concept Design Costs

Project ComponentOriginalStudy

Updated 2009Conveyance Alternative1 –

LWDD2 –

EAA(1) C-51 Reservoir Construction and Property $274 $308.5 $308.5 (2) S155A Pump Station $9 $9.4 $9.4 (3) Southern Boulevard Conveyance Crossing $6 $6.2 $6.2 (4) S5AE Pump Station $11 $11.4 $11.4 (5) L-8 Canal Conveyance Crossing $5 $5.2 $5.2 (6) C-51 Reservoir Conveyance Canal and

Inflow Structure$6 $6.2 $6.2

(7) C-51 Reservoir Water Supply Pump Station $42 $43.7 $43.7 (8) 298 District Improvements $10 $10.4 $10.4 (9) LWDD Improvements $0 $50.0 $0.0 (a) Capital cost in millions of dollars Total $363 $451.1 $401.1

17

4300

0-03

6w-fn

008

Task 4 – Project Costs

■ Total cost of water produced and delivered, either through LWDD or the EAA, cannot be done cost-effectively by Palm Beach County alone. Capital cost ($/gallon) for potable water produced would exceed $9.00 per gallon in both cases.

■ Virtually all study area utilities included, reducing per gallon cost to <$3.75 per gallon.

■ More attractive than development of new, low-pressure brackish reverse osmosis systems ($5.00 - $6.50 per gallon) that might be considered in the future, at today’s dollars.

18

4300

0-03

6w-fn

008

Next Steps

1. Utility Letter to SFWMD (Already Sent)a. Management Point of Contactb. Level of Detail Required From Utilitiesc. Benefits to Utilities in Proceeding

2. Extending Utilities CUP Timing3. Utility Support Survey by PBCWUD (Begun)

4. LWDD Investigating Options 5. PBCWUD Drafting Work Scope 2B6. Stakeholder Review & Refinement of Work Scope 2B7. BOCC Review, Approval, & County Share of Funding

for Work Scope 2B

19

4300

0-03

6w-fn

008

Thank You

C-51 Reservoir

Feasibility StudyPhase 2A

Status Report