Title
Authorization for Construction of the Tumblin Creek Sediment Facility (B)
This item is a request for the City Commission to approve the Guaranteed Maximum Price in the amount of $1,773,018.10 for the construction of the Tumblin Creek Sediment Facility with The Brentwood Company, Inc.
Explanation
The Tumblin Creek Sediment Facility (TCSF) was identified as a project in the Tumblin Creek Watershed Management Plan. The location of the project is east of SW 13th Street with access being provided through the property located at 1880 SW 13th Street. It was identified as a facility to collect sediment and trash within Tumblin Creek prior to discharging into Bivens Arm and also as a means to re-hydrate approximately 6 acres of wetlands located immediately to the north of this section of Tumblin Creek. The project was also identified as a possible Water Quality (WQ) credit.
The original budget for the project was $1,250,000 and was funded from the Stormwater Management Utility. Additional funding was received from Florida Department of Transportation (FDOT) in the amount of $190,785 and the Florida Department of Environmental Protection (FDEP) in the amount of $393,357. The current total budget for the project is $1,834,142.
Jones Edmunds was selected as the design firm. The planning, design, and land acquisition phases based on the above items utilized approximately $500,000 of the budget. This results in approximately $1,334,142 funds available for construction. All of the pre-construction costs are from the Stormwater Management Utility (SMU) funds; bring the remaining available SMU funding to approximately $750,000.
The Tumblin Creek Regional Stormwater Treatment Facility project includes the removal of a spoil berm to rehydrate wetlands, as well as sediment and trash trap. Due to the proximity of the sheet pile and trash trap to GRU's 24-inch gravity sewer main, it was determined that the gravity main should be sliplined to provide additional structural integrity to the main. The City has agreed to pay half of the cost of sliplining related to this project.
The Guaranteed Maximum Price (GMP) proposal from Brentwood Company is in the amount of $1,773,018.10. This exceeds the engineer’s estimate based off of the 60% plans completed in January 2014. Based on the complexity of the design and construction, staff is requesting approximately $400,000 in additional SMU funding. However, with this facility also being utilized as a water quality credit facility, some portion of the SMU funding will be able to be recovered.
Additional details for each of the above items are provided in the Project Timeline Summary as backup.
Fiscal Note
Funding in the amount of $1,773,018.10 is available through the City of Gainesville’s Capital Improvement Plan for Tumblin Creek Sediment Facility ($764,166.00) and utilizing undesignated stormwater management utility funds ($354,710.10), a grant from FDOT ($190,785.00), and a grant from FDEP ($393,357.00).
Recommendation
The City Commission: 1) approve the project task; and 2) authorize the City Manager or designee to execute the appropriate documents, subject to City Attorney approval as to form and content to The Brentwood Company, Inc.