SR-505-001-03 (8)
EPMW:CP:AA:DP:FJS:EC: F:\DATA\SPFILES\Sp1680 Project 7\CC1680co3.wpd
Council Meeting: July 11, 2000 Santa Monica, California
TO: Mayor and City Council
FROM: City Staff
SUBJECT: Recommendation to Authorize the City Manager to Increase the Contingency
to Contract 7463 (CCS) with Clarke Contracting, Inc. for Work on Sewer
Project 7, and to appropriate $375,000 from the Wastewater Fund
Introduction
This report recommends that the City Council approve an increase in the contingency to
Contract 7463 (CCS) with Clarke Contracting, Inc., for work on Sewer Project 7, Repair of
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Earthquake Damaged Sewers in Stewart and 26 Streets between Colorado Avenue and
Exposition Boulevard, and in Colorado Avenue between Centinela Avenue and First Court.
Staff also recommends that $375,000 be appropriated from the Wastewater Fund to the
project.
Background
At its meeting of March 11, 1999, the City Council awarded a construction contract to
Clarke Contracting, Inc. in the amount of $5,394,744, and approved a construction
contingency amount of $1,078,949 for work on Sewer Project 7. Contract 7463 (CCS)
between the City and Clarke Contracting was executed on April 14, 1999.
During the course of sewer construction, a number of changed conditions arose which
necessitated the issuance of change orders to Clarke Contracting, Inc. These included
changed soils conditions, discovery of unmapped utilities, and the need to substantially
increase the depth of the sewer, as well as other unforeseen conditions. Previously
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approved Change Orders 1 and 2 have depleted most of the contingency reserve, making
it necessary to appropriate additional funds for Change Order 3.
Discussion
Sewer construction under this contract included removal and replacement of 18,885 feet of
12", 15" and 18" sewers with new 18" through 30" sewers along Colorado Avenue and
adjacent streets. Work was carried out by traditional open cut methods which required that
the contractor make extra efforts to minimize impacts on adjacent businesses as well as
pedestrian and vehicle traffic, particularly in the downtown area. Specific unforeseen
conditions requiring the appropriation of additional contingency are as follows:
1. Existing average asphalt thickness on Colorado Avenue ranged from 10" to 16",
rather than 7" to 8", as had been indicated on earlier As-built drawings. Several
unmapped storm drains and connecting laterals were in conflict with the sewer
construction and needed to be temporarily removed during construction and later
replaced. The contractor was required to install and maintain storm drain bypass
piping during outage of the regular storm drains. Additionally, the contractor
encountered over-saturated and failing soils at various locations on Colorado
Avenue and Stewart Street, as well as abandoned jacking and boring pits on
Stewart Street. Additional backfill, compaction and paving were required to correct
these problems. The added cost of this work item is $295,000.
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2. On Colorado Avenue between 2 and 4 Street, a buried asphalt roadway was
discovered approximately 12 feet below the existing road surface. This old roadway
interfered with placement of sewer trench shoring and created substantial added
problems with excavation, backfilling and compaction. Additionally, related soils
problems resulted in damage to an existing 12" water main, requiring that it be
removed during construction and later replaced. Because of the increased
construction problems, the contractor was required to adjust his schedule to carry
out much of the work at night. The added cost of this work item is $195,000.
3. During construction in the downtown area, additional electronic signs, barricades
and arrow boards were required to direct and guide pedestrians and motorists
through the construction area. Additional flag-persons were assigned to assist with
traffic flow at Santa Monica Place parking structures. The added cost of this work
item is $20,000.
The following shows the status of the original project contingency and the effect of Change
Orders 1, 2, and 3:
Date Action Amount Remaining
Balance
Mar 11, 1999 Original Contingency $1,078,949 $1,078,949
Jun 6, 1999 Change Order 1 $ 281,282 $ 797,667
Feb 16, 2000 Change Order 2 $ 627,488 $ 170,179
Pending Change Order 3 $ 510,000 ($ 339,821)
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Budget/Financial Impact
Additional Funds Required
Change Order 3 $340,000
Contingency $35,000
Total $375,000
Funds in the amount of $375,000 are available for appropriation from Wastewater Fund 31
to Account Number C31091199.589000.
Recommendation
Staff recommends that the City Council:
1. Approve an increase in the contingency to construction contract 7463 (CCS) with
Clarke Contracting, Inc. in the amount of $375,000.
2. Appropriate an additional $375,000 from Wastewater Fund 31 to account
C31091199.589000.
3. Authorize the City Engineer to issue any necessary additional change orders to
complete Sewer Project 7 in conformance with City Administrative Instructions on
change orders.
Prepared by: Craig Perkins, Director, Environmental and Public Works Management
Anthony Antich, City Engineer
F.J. Schroeder, Disaster Recovery Program Manager
Eugenia Chusid, Project Manager
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