City Council
259 N. Wilma Avenue
Ripon, CA 95366
MEMO
To: Honorable City Council
From: Sarah Collins, Senior Civil Engineer
Date: 01/11/2022
Subject: Stockton Avenue Rehabilitation Change Order 7
RECOMMENDED ACTION:
Approve Change Order No. 7 for three field changes required to install the water line in the not to exceed amount of $24,300 (funding source: Water Enterprise Capital Fund).
BACKGROUND:
The Stockton Avenue Rehabilitation Project was awarded to D.A. Wood Construction, Inc. at the February 9, 2021 City Council meeting for an amount of $4,747,866.50. The Stockton Avenue Rehabilitation Project will involve a complete road reconstruction from Second St. to Doak Blvd, including the repair and replacement of several underground utilities along with the installation of concrete pavers, new streetlights, and 6-foot sidewalks.
At the April 13, 2021 City Council meeting, Council approved Change Order No. 1 in the not to exceed amount of $189,062.81 for the truck detour improvements required on private property and changes to the scope of the project at the request of Ripon Manufacturing Company.
At the June 8, 2021 City Council meeting, Council approved Change Order No. 2 in the not to exceed amount of $28,174.31 for the increase in price of PVC pipe material due to a national material shortage.
At the August 10, 2021 City Council meeting, Council approved Change Order No. 3 in the not to exceed amount of $135,904.03 for various unforeseen field conditions that required changes to the contract documents.
At the September, 14, 2021 City Council meeting, Council approved Change Order No. 4 in the not to exceed amount of $38,764.98 to locate a water lateral and for additional work needed for storm drain conflicts on Stockton Avenue between Doak Boulevard and Fifth Street.
At the November 9, 2021 City Council meeting, Council approved Change Order No. 5 in the not to exceed amount of $60,265.77 for additional work necessary to lower the elevation of 48” Storm Drain Pipe installed to avoid an existing PG&E transmission line.
At the December 14, 2021 City Council meeting, Council approved Change Order No. 6 in the not to exceed amount of $11,351.00 to adjust catch basins to eliminate conflicts with an MID electrical line and PG&E gas transmission line.
DISCUSSION:
During investigation of the water line near the Thompson Building Materials property, an unknown water line connection was located and determined to be a needed service for the facilities onsite. The connection required a new backflow installed so a new meter could be installed on the service. The additional cost is for the installation of that 2" backflow.
A water line connection at MID property required additional investigation and changes before the work could be completed. Previously, staff believed there was a 12" fire safety lateral and separate 6" fire hydrant lateral running parallel to one another. During the investigation, it was found that there was a single 10" water line from the main, which had a 10”x 6” tee that connected to the fire hydrant. The fire hydrant was connected and fed from the fire safety lateral, which needed to be corrected. The additional cost is for the exploration time, material costs and labor associated with the investigation of and changes to the connections.
When contractor began excavation around 5th Street in preparation for an upcoming water line tie-in, they found that the PG&E transmission line was in conflict with the new water line location. Going above the PG&E line would not have provided sufficient coverage for the water line, so the pipe needed to be constructed below the PG&E line, at a depth of 7-feet to provide sufficient separation from the transmission line. The additional cost is for the relocation of this water line.
FISCAL IMPACT:
The attached Change Order No. 7 is in the amount of $24,300 and will be funded through the Water Enterprise Capital Fund.
To summarize the funding sources to date for the Stockton Avenue Rehabilitation project, please see table below.
Original Contract Price $4,747,866.50
Change Orders (No. 1-7) $ 487,822.90
Current Contract Price $5,235,689.40
Funding Sources:
RSTP Grant $1,777,000.00
Measure K Regional Arterial a $1,979,830.76
Water Enterprise Capital $ 619,928.93
Sewer Enterprise Capital $ 798,663.94
Stormwater Enterprise Capital $ 60,265.77
Allocated Funding (as of 12/31/21) $5,235,689.40
a. The City of Ripon was allocated $2.2 million of Measure K Regional Arterial funding. As of 12/31/21, $220,169.24 is available to be allocated to future change orders.
Attachments:
1. CO 7_D.A. Wood Construction, Inc