Subject:
Title
Staff Direction: Muck Removal from the Grand Canal (District 4)
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Fiscal Impact:
$8 million to $19.9 million of Save Our Indian River Lagoon Sales Tax (Fund 1260) and up to $5.1 million of state grant funds, depending on the option chosen
Dept/Office:
Natural Resources Management Department (NRM), Save Our Indian River Lagoon (SOIRL) Program
Requested Action:
Recommendation
It is requested that the Board of County Commissioners consider options and provide direction to staff for continuing muck removal in the Grand Canal Muck Removal Project Area and authorize the County Manager to execute contracts or change orders to implement the Board's chosen option, upon approval from the County Attorney's Office and Risk Management.
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Summary Explanation and Background:
The Grand Canal project is in the unincorporated portion of the Grand Canal system, stretching from the Pineda Causeway to the northern edge of Samsons Island (Attachment A). In August 2019, the County contracted for the removal of 485,600 cubic yards (CY) of muck, which was the estimated volume of muck based on pre-project design surveys. Actual dredged volumes in the completed areas have been greater than the original estimated volume, resulting in the contractor achieving their contracted volume before completing the entire geographic area. This additional muck volume is attributable to: 1) hundreds of homeowners signing waivers that allow dredging to reach closer to their docks and seawalls than the original estimate assumed, 2) permit revisions that allow adding the Berkeley Canal to the project, 3) permit revisions that allow deeper dredging to get to the bottom of the muck instead of leaving 6" behind, and 4) new muck accumulating from algae blooms, fish kills and upland sources.
The contract to remove 485,600 CY removed muck from most of the unincorporated Grand Canal area. Attachment B highlights the areas dredged to date in green, utility corridors in orange, and the are...
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