Meeting_Body
CONSTRUCTION COMMITTEE
MAY 21, 2020
Subject/Action
SUBJECT: SOUNDWALL PACKAGE 11 HIGHWAY PROJECT
ACTION: CONTRACT MODIFICATION
Heading
RECOMMENDATION
Title
AUTHORIZE the Chief Executive Officer to:
EXECUTE Modification No. 19 to Contract No. C39033C1101-2 Soundwall Package 11 Highway Project for work above and beyond the original scope of services. This additional work is within the LOP budget and increases the total contract price in the amount of $860,000, from $66,041,760 to $66,901,760.
Issue
ISSUE
During construction of Soundwall Package 11, permeation grouting was required at several bridge locations. Permeation grouting is an industry standard and a Caltrans accepted method of stabilizing and increasing bearing and friction capacity of in-situ soils and is accomplished by injecting grout deep into the soils at low pressure. The permeation grouting specification within the Soundwall Package 11 Contract did not match the soil conditions onsite, and the Contractor was requested to assist in investigating alternative methods to stabilize the soil.
Construction Modification 19 authorizes compensation to the Contractor in the amount of $860,000 for additional time and overhead related to delays during permeation grouting investigation and re-design. This Modification increases the construction duration 287 Calendar Days, from December 19th, 2020 to October 2nd, 2021 for substantial completion.
Contract modifications on this project exceeding $750,000 require Board authorization.
BACKGROUND
The Soundwall Package 11 Project is located entirely within Caltrans right of way and consists of construction of soundwalls on Route 170 from Route 101 separation to the Sherman Way Overcrossing, and on Route 405 from north of Saticoy Street Undercrossing to Roscoe Boulevard Undercrossing. The project also includes modifying and widening eight existing bridges.
Discussion
DISCUSSION
To accommodate new deep foundation Cast in Dr...
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