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 Drilled Hole piles required for the bridge widenings, the design team incorporated a soil stabilization technique called permeation grouting. This grouting was to be performed at seven bridge widening locations. During the design phase, the design team performed investigation into the soils at these locations and included a specification that assumed the permeation grouting could be performed in accordance with Caltrans standard specifications. During construction, it was discovered that the soils at the bridge locations differed materially from a preferred soil profile that would accept the permeation grouting. The design team requested the Contractor to perform additional geotechnical surveys to determine the most appropriate path forward. After receiving the additional geotechnical information and performing additional design work, the Engineer of Record presented an acceptable solution to Caltrans and Metro. During this period of investigation and re-design, the critical path of the project was delayed 287 Calendar Days, with 215 days being excusable and compensable, and 72 days being excusable and non-compensable.
This Modification will include all costs associated with permeation grouting for the contract milestone delay.
Determination_Of_Safety_Impact
DETERMINATION OF SAFETY IMPACT
There is no impact to public safety by approving this recommendation.
Financial_Impact
FINANCIAL IMPACT
The LOP budget for Soundwall Package 11 Highway Project is $89,183,000 in local Measure R Highway 20% and Prop C 25% Funds.
The change identified herein will not increase the project budget for the current fiscal year, as the local funding is only a portion of the total project programmed funding in Cost Center 8410 (Construction Management), in Project 460324.
This a multi-year project, therefore the cost center manager and the Executive Officer, Program Management would be responsible for budgeting project costs in future fiscal years.
IMPACT TO BUDGET
The source of funds for this recommendation is Measure R (20%) and Prop C (25%) Highway Funds, which are not eligible for bus or rail operations. No other funds were considered.
IMPLEMENTATION OF STRATEGIC PLAN GOALS
The Project is consistent with the following Metro Vision 2028 Goals and Objectives:
Goal 1: Providing high-quality mobility options and improve transit efficiency;
Goals 4 and 5: Transforming LA County through regional collaboration with Caltrans and the Corridor Cities by contributing funds and providing resources to assist Caltrans in management and delivery of these projects.
...Alternatives_Considered
ALTERNATIVES CONSIDERED
The Board may choose not to approve this staff recommendation. However, this decision would result in further schedule delay and cost increases.
Next_Steps
NEXT STEPS
Upon Board approval, staff will execute Contract Modification No. 19 to Contract No. C39033C1101-2.
Attachments
ATTACHMENTS
Attachment A - Procurement Summary
Attachment B - Contract Modification / Change Order Log
Attachment C - DEOD Summary
Prepared_By
Prepared by:
Sapana Shah, Senior Construction Manager, Program Management (213) 418-3162
Brad Owen, Executive Officer, Program Management (213) 418-3143
Reviewed_By
Reviewed by:
Debra Avila, Chief Vendor/Contract Management Officer, (213) 418-3051
Richard Clarke, Chief Program Management Officer, Program Management (213) 922-7447
