Project 140-145 - Proposal - Hamers 1996-06-28 ROBIN B. HAMERS 234E 17TH ST SUITE 205
& ASSOCIATES INC COSTA MESA. CA 92527
CIVIL ENGINEERS • PLANNERS • SURVEYORS (714) 549- 192
FAX [714) 546-6516
June 28 1996
Board of Directors
Costa Mesa Sanitary District
P 0 Box 1200
Costa Mesa CA 92628-1200
RE PROPOSAL TO BEGIN PROJECT
PROJECT 1112100-145 RECONSTRUCTING VARIOUS SEWER LINES
Dear Board of Directors
Enclosed please find a proposal to begin the design phase of
subject project The project entails repairing selected sections
of sewer pipe where there is possible leaking sewage due to joint
problems This project is the fifth project of this nature
similar to Projects 122 126 132 and 140
The joints between sections of pipe can become out of alignment
or cracked due to a variety of reasons such as sags in the line,
poor installation improper backfill techniques where couplings
used to connect sections of pipe made out of different materials
are failing or where nearby construction has disturbed the sewer
line
The need for the joint reworking was established from the
televising projects where the camera passed through sections of
pipe with bad joints Repair of the joints will most likely be
accomplished by excavating from street level down to the pipe and
replacing the bad joint with a new section of pipe The
construction cost of the project will be approximately $115 000
Therefore it is proposed to complete the design phase of the
project including reviewing video tapes to determine the repair
locations preparing plans and specifications for the
construction putting the project out to bid and making a
recommendation to the Board for award of the contract at the
following hourly rates not to exceed $9 600 Please also refer
to the project description shown in the 1995-96 capital
improvement program review copy attached
Engineering $63 00/hr
Drafting $47 00/hr
Please note that billing will be only for actual time worked
Siy
Rdbin B Hamers
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Project 1112100-145 Reconstructing Various Sewer Lines
The project is similar to past projects #122 , 126, 132 and 140
which includes rehabilitation and maintenance of the existing
gravity sewer line system on an as-needed basis The results of
the original four large televising projects plus the small yearly
projects have disclosed existing problems in the main lines such
as sags, cracked pipe collapsed pipe, offset joints and root
intrusion
The project sets up a priority list of the problem areas and
repairs the lines on this basis The project is a yearly project
and part of an ongoing maintenance program The only problem
type mentioned above which is not repaired by this project is
root intrusion which is handled through root cutting by the
District
Throughout the past four projects of this type the District has
repaired the problem areas using two different methods Two of
the projects were designed using standard remove and replace
construction where the contractor excavates down to the line,
makes the repair, and then backfills and repaves One of the
projects was completed using Link-Pipe where stainless steel
sleeves were inserted into the line, adjusted to the right
location using a camera and then expanded to permanently seal
itself Link-Pipe is generally an easier and more economical
repair method however, it has some limitations in its
application The decision to use Link-Pipe or remove and replace
construction will be made during the design phase when the scope
of each repair is more fully investigated
Previous costs for excavation and reconstruction have been
approximately $650/foot since the footage is only between two and
six feet This would allow approximately 35 locations to be
included in the project Link-Pipe costs have averaged $3 500
per location or approximately $700 per foot
- 4 -
N
tom.
An estimate of the project costs is as follows
Design $ 9, 600
Construction 115, 000
Inspection 10, 400
Reserve or Contingency 15, 000
TOTAL $ 150, 000
- 5 -
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a Mr. Robin Hamers August 29 1995
Page 2
Project 112100-145 Reconstructing Various Sewer Lines
This project is similar to previous years projects and in keeping with the District's rehab and
maintenance program.
Previous years projects were Nos. 122, 126, 132 and 140
This project will utilize Link-Pipe or remove and replace construction techniques depending
upon conditions found after further investigation.
The construction budget will allow for repairs at approximately 35 locations. Based on data
provided, cost could range from $650 to $700 per foot, pending type of construction used.
Because of numerous locations the design, inspection and contingency budget appears to be
reasonable.
Project 1112100-146 Televising Sewer Lines
As discussed for previous CIP programs and with District staff this is a service type project
not construction. Therefore, normal design, construction and inspection percentages do not
apply Project description, reasoning of need and approval were presented well.
The estimated televising costs represents approximately 11,000 feet of pipe to be televised at
$ 45/1f based on discussions with District staff.
Because of the nature of the project and that District staff is needed at all times for cleaning
ahead of the camera, coordination, and supervision of the work, the District Engineer costs
will be higher percentage wise, versus a design project.
It is noted that suggestions from 1994-95 were incorporated in this year s CIP program.
Project 1112100-147 Update Early Warning System Protecting Pumps
Recent completed projects utilized pumps containing the latest sensing mechanisms.
This project will modify existing pumps to provide similar telemetry for sensing moisture
and heat.
This is the first of several projects which will update pump telemetry over a three to five year
period.
For budgeting purposes the design, construction inspection and contingency costs appear
reasonable.
As a suggestion for future projects, the use of a map (Thomas Bros) showing proposed
locations would be beneficial.