AGENDA TITLE:
title
Accept Improvements Under Contract for Lodi Lake Culvert Replacement (PW)
end
MEETING DATE:
May 1, 2024
PREPARED BY:
Public Works Director
recommendation
RECOMMENDED ACTION:
Accept Improvements Under Contract for Lodi Lake Culvert Replacement.
body
BACKGROUND INFORMATION:
The City of Lodi has had ownership of Lodi Lake since the mid-1930s. With ownership of an old facility comes maintenance of old infrastructure. This infrastructure includes a 48” diameter corrugated metal culvert (connection pipeline) between Lodi Lake and a small bypass water body within Lodi Lake Park. The culvert crosses the Lodi Lake Park access road, roughly halfway between the nature area parking lot and the RV parking area at the northeastern portion of the lake (see Exhibit A). While there are no records of when the culvert was originally installed, it appears to be at least 65 years old.
There is also a concrete headwall on each end of the culvert. The headwall provides a support for the edge of the access road that crosses the culvert, as well as providing end support and erosion protection for the culvert. There were broken portions of the headwall, and sections of the culvert that were missing (see Exhibit B). Additionally, the northern concrete headwall was being supported by 2 different trees.
This project replaced the culvert and headwalls during the month of February (while the lake was empty). The project also removed the two trees that were impacting the northern headwall. The paving above the culvert will be completed with the adjacent Lodi lake Improvement Project to provide a seamless connection with the adjacent access road replacement.
Council approved the plans, specification, advertisement, award authority and change order authority on October 18, 2023. Fifteen (15) bids were received on November 15, 2023, with Consolidated Engineering Inc. being the lowest bidder (see breakdown below). The contractor started work on February 5, 2024, and completed the work on February 29, 2024. The contract was completed in substantial conformance with the specifications approved by City Council. The final contract price was $165,246.79, which is $16,746.79 more than the original contract price. The additional costs were due to the headwall extension, buried manhole demolition, soil stabilization fabric, additional tree removal, dewatering, and removal of concrete encasement of the existing headwall.
Above/(Below)
Bidder Location Bid Engineer’s Estimate
Engineer’s Estimate $ 230,000.00
Consolidated Engineering Inc. Valley Springs $ 148,500.00 $ (81,500.00)
PBM Construction Rocklin $ 169,797.00 $ (60,203.00)
Soracco Lodi $ 172,870.00 $ (57,130.00)
Corcus Construction Inc. San Francisco $ 188,255.00 $ (41,745.00)
Kroeker, Inc. Fresno $ 197,000.00 $ (33,000.00)
Taylor Backhoe Service Merced $ 209,518.00 $ (20,482.00)
United Paving Maintenance Hughson $ 211,530.00 $ (18,470.00)
Globe Engineering Development Fairfield $ 215,550.00 $ (14,450.00)
ARB, Inc. Pittsburg $ 218,508.00 $ (11,492.00)
A.M. Stephens Construction Lodi $ 239,286.00 $ 9,286.00
L.R. Varwig & Sons, Inc. Stockton $ 245,425.00 $ 15,425.00
Suulutaaq, Inc. Suisun City $ 245,650.00 $ 15,650.00
R Surron Enterprises Vallecito $ 252,860.00 $ 22,860.00
Diede Construction Woodbridge $ 303,000.00 $ 73,000.00
Pipe and Plant Solutions San Leandro $ 373,428.00 $143,428.00
Following acceptance by the City Council, as required by law, the City Engineer will file a Notice of Completion with the County Recorder’s office. The notice serves to notify vendors and subcontractors that the project is complete and begins their 30-day period to file a stop notice requiring the City to withhold payments from the prime contractor in the event of a payment dispute.
STRATEGIC VISION:
5C. Infrastructure: Address deferred maintenance.
6B. Parks: Expand, develop, and maintain Lodi Lake to meet or exceed industry standards.
FISCAL IMPACT:
This project will have a minimal impact on total maintenance costs but will enhance the safety and reliability of the access to the northern portion of Lodi Lake.
FUNDING AVAILABLE:
This project was funded by Parks Capital (432) PKCP-22008.
_______________________________________
Charles E. Swimley
Public Works Director
_______________________________________
Andrew C. Keys
Interim City Manager