MANASOTA & PEACE RIVER BBDs Meeting Notebook 10-21-09.docx

F032
Peace River Regional Reservoir Expansion
Project Type WS&R Dev.
AOR(s)
Water Supply
Basin(s) General Fund (District), Peace River, Manasota
Cooperator(s)
Project Manager GOODWIN, AUDRIE
Task Manager(s)
Status Ongoing
Peace River/Manasota Regional Water Supply Auth.
ARMSTRONG, BRIAN
Description
The Peace River Regional Reservoir Expansion is an alternative water supply project that will expand the surface
water storage capacity of the Peace River Manasota Regional Water Supply Authority's water supply facilities by
constructing a six (6) billion gallon reservoir. The total cost to construct the reservoir is approximately $77 million.
Benefits
In combination with project F033, which expands the Authority's water treatment plant capacity from 24 to 48 mgd, this
project will enable the Authority to supply up to their permitted amount of 32.7 mgd on an annual average basis.
Costs
The total estimated project cost is $77,049,654. The District's share is $37,986,143 which includes District ad valorem
funding of $28,409,224 and SB444 funding of $9,576,919. The District ad valorem cost may be reduced depending on
future funding received from the State, as described in Senate Bill 444. It is anticipated that, of the District's projected
total funding contribution of $28,409,224, the District Governing Board will contribute $14,526,959, the Manasota
Basin Board will contribute $10,560,764, and the Peace River Basin Board will contribute $3,321.501. The Governing
Board met their total funding match in FY2009 and therefore does not have a FY2010 funding contribution. The
FY2010 request of $644,694 represents funding from the Peace ($600,777) and Manasota ($43,917) Basin Boards
that will maintain the contract percentages.
Additional Information
The Peace River facility is located in DeSoto County and provides potable water to residents of Charlotte, DeSoto and
Sarasota Counties. As configured in 2005, the Facility includes a surface water withdrawal from the Peace River, a
625 million gallon reservoir (85 acres), a 24 mgd surface water treatment plant, and 21 Aquifer Storage and Recovery
(ASR) wells with a total storage capacity of approximately 6 billion gallons. Because the Peace River experiences
significant periods of low flow, it is important for the Authority to have sufficient capacity to store excess flows during
wet periods for use during dry periods when river flows are insufficient to meet demands. Withdrawals from the Peace
River are prohibited when flows, as measured at the Arcadia gage, are less than 84 mgd (130 cubic feet per second
(cfs)). The Authority's customers have identified an additional demand of 15 mgd beyond the 18 mgd that is currently
provided by the Authority's Facility, for a total 2015 demand of 33 mgd. Because of the uncertainty associated with
permitting new ASR wells due to mobilization of arsenic in the aquifer, the Authority proposed removing the ASR
component of the Peace River Facility Expansion Project (F033). As a result, the Authority needed additional storage
capacity and requested amending this project to increase reservoir capacity from two (2) to six (6) billion gallons. In
October 2005, the Peace River and Manasota Basin Boards and the Governing Board approved increasing the size of
the reservoir and deleting the additional ASR wells from the Facility Expansion project. The combination of this project
and the Peace River Facility Expansion (F033) will allow the Authority to deliver a permitted capacity of 32.7 mgd to its
customers at a total cost of $167,192,854. The project is a critical component of the District's SWUCA water supply
plan by providing users in the coastal areas, where there is the greatest threat of saltwater intrusion, with supplies
other than ground water. Of the total project cost ($77 million), approximately 90 percent ($69.5 million) is expected to
be needed for construction, and the remainder for design, permitting, and administration.
020 - Peace River Basin 173