20-1203_WOOD ENVIRONMENT & INFRASTRUCTURE SOLUTIONS, INC._Staff Memo12/3/20
Project Initiation Memo
TO: Ben Siegel, City Manager
FROM: Charlie View, Assistant City Manager
Prepared by: Eric Bauman, Assistant Utilities Director
SUBJECT: __ Consulting Services for the GWRP Clear Well Tank___
Description: The GWRPs 325,000-gallon Clear Well Tank (CWT) has exceeded its
useful life. The roof joists, in particular the roof joist support connections,
center king post, and floor bolts have excessive corrosion and loss of
metal. The roof shows excessive deformation.
Since the knowledge available and the codes have changed over the nearly
20 years since the CWT was designed, we must revisit the foundation
seismic design prior to moving forward with the replacement of the CWT.
The original geotechnical engineers, now Wood PLC, still have the project
file and underlying data. Having reviewed the data available to them, Wood
proposes to analyze the tank design parameters (seismic / geotechnical) to
meet the
1) New seismic requirements in CBC 2019/ASCE 7-16 for a D rated
structure; and,
2) Perform the soil borings to calculate the site accelerations, and
liquefaction potential.
3) Tasks include: Limited field exploration including 2 CPT borings,
liquefaction analyses, site specific ground motion study, and site
response analysis (SRA). The SRA may not be needed, at which
point the work will be stopped saving $21,905.
The engineers at Wood PLC, are the same ones that performed the original
analysis, and the original geotechnical data.
Location: 32400 Paseo Adelanto – GWRP Clear Well Tank
Project Cost: $40,505
Funding Source: 50-94799-62250-19803-005
Proposals: Competitive Proposals (Only One Proposal as Outlined Above).
Proposals: Wood PLC, $ 40,505
Staff Analysis & Recommendation: Staff recommends that the City Manager award the GWRP
Clear Well Geotechnical/Seismic consulting services to Wood PLC in the amount not to exceed
$40,505.00. Wood PLC is on the City’s Qualified Bidders List for professional engineering
consulting services and has the history and records readily available from past services provided for
the GWRP Clear Well Tank that make them preferred vendor of choice. The City’s current Qualified
Bidders List was approved by City Council on December 3, 2019.
EPB