HomeMy WebLinkAbout16 Pump Station Design AwardAM TRUCKEE DONNER AGENDA '
Public Utility District
MEETING DATE: October 6, 2021
TO: Board of Directors
FROM: Neil Kaufman, Water System Engineer
SUBJECT: Consideration of a Contract to Design the Pioneer Trail Pump Station
APPROVED BY
Brian C. Wright, General Manager
RECOMMENDATION:
Authorize the General Manager to execute a contract with Sauers Engineering to design
the Pioneer Trail Pump Station an amount not to exceed $157,590, plus a ten percent
change order allowance for a total authorization of $173,350.
BACKGROUND:
The Tahoe Donner subdivision consists of approximately 5,600 single family homes, about
400 multi -family residential units, a golf course, downhill ski area, cross-country ski area
and other amenities. This represents about 44% of the water system customers. An
additional 500 residential units are expected in the Tahoe Donner area at build out
conditions. The entire subdivision is served by a single 14" welded steel pipeline with two
pump stations and two storage tanks that essentially serve as forebays. These facilities
were constructed in the early 1970s and are approaching the end of their useful life.
The District previously identified the need to construct a second pipeline into Tahoe
Donner and this project was discussed in the current Water System Master Plan. The
master plan identified the need for a 20" pipeline, but more recent estimates of buildout
water demand have determined that the pipeline can be downsized to 16" diameter.
On the eastern end, the new pipeline will connect to an existing 24" pipe near Pioneer Trail
and Comstock Drive. The western end will connect to an existing 16" pipe at the
intersection of Northwoods Boulevard and Lamplighter Way. It is currently planned to
install electrical and communications conduits in a joint trench with the water pipeline.
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Southwest Gas (SWG) has also expressed an interest in installing a natural gas pipe along
this same route and the Water Department will continue to work with SWG towards a joint
project.
A new pump station will be needed to lift water into the Tahoe Donner area. The planned
location for the pump station is on District -owned property in close proximity to the TNT
Materials concrete batch plant. It is planned to break the project into two separate
construction contracts — one covering the pump station and the other covering the
pipeline/conduit joint trench.
In November 2020, the District awarded a contract to Water Works Engineers (WWE) to
provide design assistance for this pipeline project. The scope of the WWE contract
covered two items:
• Design the pipeline/conduit crossing of Trout Creek
• Perform hydraulic transient analysis of the new pipeline/pump station system
In November 2020, it was also noted that additional RFPs would be issued in the future for
design of the necessary pump station and for performing the CEQA review of the project.
In August 2021, an RFP to select a consultant to design the new Pioneer Trail Pump
Station was issued. Three proposals were received in response to the RFP:
• Eichleay — Concord, Ca
• Sauers Engineering — Nevada City, CA
• Waterworks Engineers (WWE) — Roseville, CA
A staff committee was selected and the proposals were evaluated based on the following
criteria:
• Proposed scope of work and project methodology (35%)
• Experience of the firm with similar pipeline design projects (15%)
• Experience of project team with similar pipeline design projects (15%)
• The firm's procedures, methodology and quality assurance/quality control (5%)
• References (10%)
• Cost (20%)
After completion of the technical review, the proposal were rated by the committee.
Technical Scoring
Firm Overall
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Rank
Waterworks Engineering
1
Sauers Engineering
2
Eichleay
3
The proposed costs were then reviewed. The cost proposals varied significantly and
ranged from approximately $158,000 to $454,000. There was a difference in the design
phase costs of about $170,000 between Sauers and WWE. Further discussions with
WWE identified areas where the level of effort (and associated cost) could be reduced, but
there remained a significant cost differential between the two firms.
Cost Scoring
Firm
Rank
Sauers Engineering
1
Waterworks Engineering
2
Eichleay
3
Finally, an aggregated ranking (technical capability & cost) of the proposers was
developed:
Overall Scoring
Firm
Rank
Sauers Engineering
1
Waterworks Engineering
2
Eichleay
3
Therefore, it is recommended that the contract be awarded to Sauers Engineering.
It is currently planned to bid the construction contract in March or April of 2022, with
construction to follow in the summer of 2022. Given the long lead times associated with
pumps, electrical switchgear and generators, it is likely that the District will have to pre-
purchase those items and bids will likely be present to the Board over this coming winter.
FISCAL IMPACT:
The cost proposal from Sauers was $157,590. It is recommended that a ten percent
change order allowance be established for a total authorization of $173,350.
The planned funding source for this work is the Water Capital Reserve Fund.
ATTACHMENTS:
NONE
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