Proposal 144 - Proposal - Hamers - 1995-10-26 ROBIN B. HAMERS 234 e 17TH ST SUITE 205
S. ASSOCIATES, INC.
COSTA MESA,CA 92627
CIVIL ENGINEERS PLANNERS SURVEYORS (714]548-1192
October 26 1995
Board of Directors
Costa Mesa Sanitary District
P 0 Box 1200
Costa Mesa CA 92628
RE PROPOSAL TO BEGIN PROJECT
PROJECT 1112100-144
MANHOLE REHABILITATION
Dear Board of Directors
Enclosed is the project description as fully described in the
1995-96 Capital Improvement Program The project consists of
rehabilitating various manholes experiencing such problems as
deterioration due to gas concentration corroded metal steps
worn out rings and covers worn out manhole channels at the
bottom of manholes and manholes needing to be raised or lowered
to match the street surface elevation
The District field crews and Inspector keep notes of manhole
deficiencies as a part of their regular course of business
throughout the year The notes are forwarded to the District
Engineer for inclusion in a capital replacement project
However if any manhole problem is found to be severe and
requires immediate attention it is repaired immediately under a
purchase order
As shown in the 1995-96 budget it is proposed to complete the
design phase at the standard hourly rates shown below not to
exceed $9 500
Engineer $ 59 00/hr
Drafting 47 00/hr
Please note that billing is only for actual time worked
Si clenLrrl'el y LI
R bin B Hamers
RBH/jp/proposal cms
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Proiect 1112100-144 Manhole Rehabilitation
The project will rehabilitate various manholes with various
problems throughout the District as described below Adjacent to
each pumping station is a sewer manhole where the last leg of the
gravity system exists prior to entering the pumping station
This manhole usually has two or more sewer lines flowing into it
and serves as a confluence manhole for all flows entering the
station Due to the turbulence associated with the confluence
causing high strength gas concentration, plus gas coming from the
pumping station wet well into the manhole, erosion of the manhole
walls and bottom occurs It is proposed to coat the manhole
interior with industry standard polyurethane coating which will
prevent erosion Prior to receiving the coating the walls will
be built back to full thickness and waterproofed
Other manholes in the District require various other
rehabilitation methods such as replacing corroded metal steps
with plastic steps replacing ring and covers worn from traffic,
adjusting manhole covers to the appropriate elevation,
rechanneling manhole bottoms , and replacing aluminum access
covers to pumping station wet wells Also, one pumping station
requires a repair coating on the existing polyurethane coating on
the walls
An estimate of the project costs is as follows
Design $ 9, 500
Construction 65, 000
Inspection 9, 500
Reserve or Contingency 16, 000
TOTAL $100, 000
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Soule Engineering Corporation consulting engineers architects
1501 Qua,)Street 714/476-3300
P.O. Box 3030 FAX 714/721-7142
Newport Beach, CA 92658-9020 Telex 685561
TRRr1SPORTRTIOrl SERVICES
Mr Robin Hamers, District Manager/Engineer August 29 1995
COSTA MESA SANITARY DISTRICT
Post Office Box 1200
Costa Mesa, CA 92628-1200
1995-96 Capital Improvement Program (CIP) Review
I have completed my review of the Costa Mesa Sanitary District (District) s CIP report for the
1995-96 fiscal year
The review consisted of reading the project descriptions, telephone conversations with District
staff(Robin Hamers) and an independent analysis of construction costs, design and construction
engineering costs, and contingency costs.
The following represents my analysis of each of the CIP projects:
This is the fourth independent review of the District s CIP program, 1992 93 being the first year
reviewed. The 1995-96 proposed improvement projects appear warranted and the report
continues to properly reflect the on-going capital improvement program.
Project 1112100-144 Manhole Rehabilitation
This is the first on what appears to:be an on-going rehab of manholes.
Existing manholes are experiencing deterioration due to gas and flow turbulence.
Project will rebuild walls to bring them back to standard thickness prior to coating with
polyurethane.
For budget purposes the estimated design/construction cost and contingency cost appear
reasonable.
It is suggested that future and similar projects include a location/vicinity map and/or
estimated cost per location.
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