10/07/2014 (3) - Laserfiche WebLink

Home Browse Search

INDIAN RIVER COUNTY PUBLIC WORKS DEPARTMENT STORMWATER DIVISION 1801 27th STREET VERO BEACH, FLORIDA 32960 Phone: (772) 226-1562 Consent Agenda TO: Joseph A. Baird, County Administrator THROUG Christopher R. Mora, P.E., Public Works Direct FROM: . Keith McCully, P.E., Stormwater Engineer SUBJ T: EGRET MARSH STORMWATER PARK — APPROVAL OF FDEP GRANT AGREEMENT NO. S0733 TO REPLACE EGRET MARSH HARVEST RAKE DATE: September 16, 2014 INTRODUCTION Staff recently applied for and received a Florida Department of Environmental Protection (FDEP) grant award for the purchase and installation of a new second - generation algae harvest screen for Egret Marsh Stormwater Park (Egret Marsh). The purpose of this Agenda Item is to request the Board of County Commissioners to approve the grant and authorize staff to purchase and install the new harvest screen. Egret Marsh is a regional stormwater treatment facility that grows Targe algae crops to remove dissolved nitrogen and phosphorus from water in the Indian River Farms Water Control District's Lateral D Canal, serving an approximate 9,000 acre watershed that discharges into the Indian River Lagoon. Over 58 tons of algae may be harvested at Egret Marsh each week. As algae is scraped from Egret Marsh's floway, it enters a collection chamber where it flows into a mechanical harvest screen that lifts the algae out of the water. The existing harvest screen was manufactured by Duperon Corporation and when Egret Marsh was designed, the screen was the best in its field. After Egret Marsh was placed in operation in April 2010, staff and Duperon Corporation discovered that due to Targe algae loads, it was impossible to collect the harvested algae without expending significant man-hours to keep the harvest screen free from F:\Public Works\KeithM\Stormwater ProjectsEgret Marsh Operation\Agenda Items\Agenda - Consent - Duperon Rake Grant.doc 65