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

L215
Rotunda ASR Well Conversion for Reuse Water
Project Type Cooperative Funding
AOR(s)
Water Supply, Water Quality
Basin(s) Peace River
Cooperator(s)
Charlotte County Utilities
Project Manager BADER, TAMMY
Task Manager(s)
Status Ongoing
Description
This ongoing, multiyear, alternative water supply project consists of a feasibility study to evaluate the alternatives for
installation of a reclaimed water ASR and, if feasible, the conversion of one (1) existing potable water supply well
located in the Rotonda area to an Aquifer Storage and Recovery (ASR) well for reuse. Upon the successful completion
of the feasibility study and favorable outcome of the preliminary permitting, Charlotte County Utilities will proceed with
the design, final permitting, construction and testing of the recommended ASR well system and associated piping to
directly connect the ASR well to the reclaimed water transmission system. The ultimate goal of the project is to create
an underground storage reservoir for reuse water produced initially by the Rotunda Wastewater Treatment Facility
(WWTF), and eventually for the combined reuse water in the west county and possibly central county areas.
Benefits
This project will help to satisfy the short term need to provide wet weather storage space for reuse water, beyond what
currently exists at the Rotonda Water Reclamation Facility, which is minimal. The longer term need served by this
project is to provide regional storage capacity for excess wet weather reuse for the entire west county area and
ultimately for the central portion as well, and facilitate the eventual interconnection of the central and west county reuse
systems to provide adequate reuse water for the entire region.
Costs
The total project cost for the feasibility study and ASR well system is estimated to be $3,000,000. The District is
requested to reimburse Charlotte County for up to 50 percent of the eligible project costs up to a maximum of
$1,500,000. The Peace River Basin budgeted $100,000 in FY2005, $380,450 in FY2007, $240,000 in FY2008,
$216,250 in FY2009 and $225,000 in FY2010. Funds in the amount of $90,900 in FY2007 and $80,000 in FY2008
have been allocated to the project from the Water Protection and Sustainability Trust Fund; these funds will be applied
to reduce the Peace River Basin Board cost share. It is expected that Charlotte County will request $423,750 in
FY2011 for the sixth and final year of funding for this multi-year project. No cost-benefit is calculated for this project, as
it provides additional storage. The future funds identified for the project are contingent upon approval of such amounts
by the District Governing and Basin Boards in the annual budget(s).
Additional Information
Charlotte County Utilities (CCU) previously completed a feasibility study indicating that such a conversion would be
feasible. However, upon completion of the ASR Reuse Feasibility Study, CCU determined that a new ASR well system
at Rotonda would be advantageous and submitted an application for construction of a Class V Well at the Rotonda
site to the Department of Environmental Protection. Factors determining that the conversion of the potable well would
not work included the capacity and recovery rate of the well and the current DEP stance on permitting ASR wells.
Thus, it was determined a new well would be constructed at Rotonda in a non-drinking water standard zone (greater
than 10,000 tds). CCU will proceed with the design, final permitting, construction and testing of the recommended
ASR well system and associated piping to directly connect the ASR well to the reclaimed water transmission system.
The predicted recovery rate for the ASR well is expected to be between 70% and 90% (700,000gpd to 900,000gpd) of
the estimated recharge after the buffer zone is achieved. The amount of water to be stored and delivered during
recharge (including the buffer zone) upon the ASR well being placed into service is expected to be between 100 to
150 million gallons and 1,000,000 gpd, respectively. The county is also currently cooperating with the District on a
project to interconnect its two major WWTF's. The Charlotte County Regional Reclaimed Water Expansion project
(H027) will construct a major portion of the necessary transmission piping to interconnect Charlotte County's East Port
and West Port WWTF's. CCU's current demand for reclaimed water exceeds 2,000,000 gallons per day (gpd), but the
facility can only produce up to 800,000 gpd and supplemental surface water sources are being utilized to make up for
the additional demand (1,200,000 gpd). This is a stand-alone project; however, upon successful implementation of the
single ASR well system, it is expected that two more ASR well systems will be completed as a second phase of this
project. Of the total project cost of $3,000,000, approximately 73 percent ($2,200,000) is expected to be needed for
construction, and the remainder ($800,000) for design and administration.
020 - Peace River Basin 257