HomeMy WebLinkAbout10 SR 89 Slipline - Closeout r r - AGENDA ITEM 10
Public,rTRUCKEE DONNE
District
MEETING DATE: December 7, 2022
TO: Board of Directors
FROM: Neil Kaufman, Water System Engineer
Chad Reed, Water Utility Director
SUBJECT: Closeout of the State Route 89 Water Main Sliplining
Construction Contract
APPROVED BY
Brian C. Wright, General Manager
RECOMMENDATIONS:
Adopt Resolution 2022-21 accepting the State Route 89 Water Main Sliplining project
as complete and authorize the filing of the Notice of Completion.
BACKGROUND:
The District has operated an existing 10" steel water pipe along the west side of State
Route 89 south. This starts at the north shoulder of Donner Pass Road in front of
Mountain Hardware and ends at the Donner Creek Well site at the northwest corner of
Deerfield Drive.
This pipe was installed in 1970 and has experienced a number of leaks in the past 10
years. Recently, two active leaks on this pipe developed that were surfacing. One of the
leaks was located just north of the westbound on-ramp to Interstate 80. The other was
located south of the eastbound off-ramp from Interstate 80. This section of pipe provides
a loop to customers south of Interstate 80 and is important in the conveyance of water
into the Donner Lake, Gateway and Tahoe Donner areas.
The leak north of Interstate 80 was located within a casing. Normally, to repair a leak
within a casing, operators would excavate the ends of the casing, removing the leaking
section of pipe and replacing it with a new section of pipe. Typically, the existence of the
casing would allow for this work to be performed without disrupting traffic. However, the
casing at this location corresponds to the old on-ramp configuration prior to construction
of the roundabouts and the south end of the casing is now located within the pavement
section of the roundabout.
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A similar leak occurred in 2005, south of Interstate 80 during construction of the
roundabouts. At that time, the District was able to coordinate with contractor building the
roundabouts to perform an emergency repair that involved removing and replacing about
180 feet inside a casing. Both ends of the casing were accessible because traffic had
been re-routed by the construction.
Given the need to minimize any traffic disruption, staff considered a number of trenchless
rehabilitation options for this section of pipe. A number of contractors and manufacturers
were contacted. Eventually, sliplining the existing pipe was identified as the only option
that could be accomplished in the fall of 2022.
Contract documents were prepared for this rehabilitation work and bidding began in
September 2022. The bid opening was held at 11:00 am on September 22. Two bids
were received. The low bid was from Advantage Reline in an amount of $223,537.53.
On October 5, 2022, the Board awarded the construction contract for the State Route 89
Water Main Sliplining project to Advantage Reline. The Board also established a
change order allowance of $22,362.47, for a total authorization not to exceed
$245,900.00.
Advantage began work in the middle of October and completed its scope of work by the
end of October. There were no change orders on the project.
OBJECTIVES & GOALS:
This item is in support of the following goals and objectives:
District Codel.05.020 Objectives:
3. Provide reliable and high quality water supply and distribution system to meet current
and future needs.
Strategic Goals:
1. Manage for Financial Stability and Resiliency (1 .7. Water meter Testing and
Replacement program)
FISCAL IMPACT:
The original bid price was $223,537.53. The Board also established a $22,362.47change
order allowance for a total authorization of $245,900.00. As noted above, there were no
change orders submitted for the project.
In addition to the amount paid to Advantage Reline, the District has incurred additional
outside expenses for archaeological monitoring, traffic control and rental of trench safety
equipment on this project.
ATTACHMENTS:
Resolution 2022-21
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