WRAC Issues Workshop Acme Basin B Discharge Project Wellington Community Center January 23, 2006

WRAC Issues Workshop

Acme Basin B Discharge Project

Wellington Community Center

January 23, 2006

1. C-43 (Caloosahatchee River) West Reservoir

2. EAA Reservoir Phase 1 / Boles & Cross Canals

3. EAA Stormwater Treatment Area Expansion

4. Picayune Strand (Southern Golden Gate Estates)

5. C-44 (St. Lucie Canal) Reservoir / STA

6. Water Preserve Areas

• Acme Basin B Discharge Project

• Site 1 Impoundment

• C-9 Impoundment

• C-11 Impoundment

• WCA-3A/3B Seepage Management

7. Biscayne Bay Coastal Wetlands Phase 1

8. C-111 Spreader Canal

Everglades Restoration Acceler8 Projects


Location

C-51 CANAL

PUMP #1

PUMP #2

S-319

S-362

WCA-1

LOXAHATCHEE NATIONALWILDLIFE REFUGE

BASIN A

BASIN B

40 72 42 73 44 45SECTION

24


Current Conditions

C-1

PUMP #4 PUMP #3 PUMP #6

STA-1E

Southern Blvd.S-155A

S-361

89

152

10

0

20

40

60

80

100

120

140

160

180

Acme Pump #1 Acme Pump #2 EFA Requirement

Concentr

atio

n (

ppb)

Flow-Weighted Mean Concentration, WY02 (May 1, 2001 through April 30, 2002)

Source: 2003 Everglades Consolidated Report, Chapter 8B: Everglades Stormwater Program

Acme Basin B Phosphorous Discharges

Acme Basin B Discharge Project The Problem with Current Conditions

Requires:

1. Improvements to C-1 canal to increase conveyance capacity and connect the C-1 canal to the C-51 Canal

2. Construction of new pump station AcmePS7 to pump from C-1 canal into C-51 Canal

3. Construction of detention area in Section 24 for temporary offline storage

4. Construction of new pump station AcmePS24 to fill the Section 24 detention area


Project Purpose

Acme Pumps #1 and #2 must be shut down on December 31, 2006 to comply with the Everglades Forever Act. Water in Acme Basin B must be re-routed north through Acme Basin A and discharged into the C-51 canal.

PUMP #1

PUMP #2

PUMP #4 PUMP #3 PUMP #6S-319

S-362

WCA-1


40

NEW PUMP #7 (220 cfs)

C-51 CANAL

BASIN A

BASIN B

STA-1E

Southern Blvd.


Project Features

C-1

CA

NA

L

SEC 24


PUMP #8

S-361

S-155A

• C-1 Canal Improvements

– 3 miles of modified section for 67 to 220 cfs conveyance capacity

– Two 84” culverts at FPL crossing

– Meets DOT setback requirements for Flying Cow Road

• Pump Station AcmePS7

– Connects C-1 to C-51 canal

– 220 cfs (three 110 cfs pumps)

– Diesel

– Includes gravity discharge bay


C-1 Canal Improvements and AcmePS7

• Section 24

– Converts 365 acres of agricultural land to impoundment with upland areas and tree islands

– Storage of up to 5 feet of water (1,028 ac-ft)

– Two gated culverts (100 cfs each) for inflow/outflow

• Pump Station AcmePS24

– Inflow pump station

– 200 cfs (three 100 cfs pumps)

– Diesel


Section 24 and AcmePS24

Section 24 with additional

recreational components

• C-1 canal improvements and pump station AcmePS7– Allows Basin B water to be conveyed to the C-51 canal

and STA-1E

• Section 24 and AcmePS24– Provides temporary offline storage of 1,028 ac-ft of water

• Maintains flood protection in Acme Basin B• Reduces phosphorous load to C-51 canal / STA-1E• Potential water supply

– Provides a buffer between natural and developed areas• Converts 365 acres of agricultural land to upland and open water

habitat

– Provides recreational opportunities• Walking trails, overlooks, equestrian trails


Project Benefits

• Required C-1 Canal modifications are less than BODR– Modeling indicates that 220 cfs is not needed along entire length – flow incrementally

increases from 67 cfs at Structure #40 to 220 cfs at AcmePS7

• Realignment of Flying Cow Road minimized by using curb & gutter, guardrail, and steeper canal slopes

– Reduces cost

• AcmePS7 was moved 1,000 ft south from C-51 canal to near FPL crossing– Moves pump station away from residences

• AcmePS7 equipped with gravity discharge bay– Reduces cost of operation

• Pump stations will be diesel not electric– To meet District standards

• Section 24 primary purpose changed from passive wetland to detention area– Maintains flood attenuation and level of service locally and in the C-51 Canal

– Temporary storage provides regional benefits

– Reduces phosphorus load to C-51 Canal / STA-1E

• Section 24 seepage canal added– Protects against groundwater mounding


Design Modifications After BODR / August 2005 Workshop

2004

Timeline – Calendar Years

2005 2006 2007 2008

C-1 Canal and AcmePS7

Section 24 and AcmePS24

Planning and BODR complete Sept 2005


Schedule

Design complete February 2006

Procurement complete April 2006

Construction complete Nov 2006

Planning and BODR complete Sept 2005

Design complete March 2006

Procurement complete May 2006

Construction Phase 1 operational Dec 2006

Phase 2 (landscaping, recreational) complete May 2007


Opinion of Probable Cost

C-1 Canal $1.4M

AcmePS7 $4.2M

Sec 24 $6.3M

AcmePS24 $3.8M

Design and Admin $2.6M

SUBTOTAL $18.3M

Sec 24 Recreation $1.0M*

Sec 24 Real Estate $4.1M

TOTAL $23.4M

* = alternate funding sources

PUMP #1

PUMP #2

PUMP #4 PUMP #3 PUMP #6S-319

S-362

WCA-1


40


C-51 CANAL

BASIN A

BASIN B

STA-1E

Southern Blvd.


Questions?

C-1

CA

NA

L

SEC 24


PUMP #8

S-361

S-155A

Documents

WRAC Issues Workshop Acme Basin B Discharge Project Wellington Community Center January 23, 2006