Title
Hogtown Creek NW 8th Avenue Culvert Sediment Removal (B)
This item will increase by $22,500 the amount of the purchase order and contract with Subaqueous Services, Inc. for sediment removal at the Hogtown Creek NW 8th Avenue Culvert.
Explanation
The City Commission awarded the bid for the sediment removal from the Hogtown Creek NW 8th Avenue Culvert to Subaqueous Services, Inc. on July 25, 2005, and authorized the City Manager to execute the contract and issue the purchase order for $89,069. During the on site pre-construction meeting, it was determined and verified by Public Works engineering staff that the amount of sediment to be removed exceeded the quantity defined in the bid documents by 400 cubic yards. The contractor's bid price for additional sediment removal is $10,000 per 100 cubic yards. The City Commission approved the associated change order in the amount of $40,000.
The City of Gainesville entered into a grant agreement with the United States Natural Resources Conservation Services (NRCS) where they would provide 75% of the funding for this work through their Emergency Watershed Protection Program. The balance is provided by the City's Stormwater Management Utility.
The contractor began work on September 13, 2005. On October 6, 2005 the Northwest Gainesville area experienced a significant rainfall event. The weather station located at the Gainesville Regional Airport reported 2.67" of which most fell within an hour or so. This rainfall event caused elevated creek flows resulting in the deposition of additional sediment in the previously excavated areas of this project. The field engineer for the NRCS informed Public Works that all of the sediment must be removed at the time of their final inspection in order for the terms of the NRCS/City grant agreement to be met, without which no reimbursement to the City would be allowed.
Without the reimbursement from the NRCS, the City would have to cover the entire $129,069 on ...
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