HomeMy WebLinkAbout09. Authorize construction contract change order for District Project 8456 re Via Ferrari Sewer Replacement Page 1 of 3
Item 9.
CENTRAL SAN BOARD OF DIRECTORS
POSITION PAPER
MEETING DATE: AUGUST 20, 2020
SUBJECT: AUTHORIZE THE GENERAL MANAGER TO EXECUTE A CONSTRUCTION
CONTRACT CHANGE ORDER IN THE AMOUNT OF $250,000 WITH
CRATUS, INC. TO INCLUDE THE VIA FERRARI SEWER REPLACEMENT
UNDER THE DANVILLE SEWER RENOVATIONS, PHASE 3, DISTRICT
PROJECT 8456
SUBMITTED BY: INITIATING DEPARTMENT:
DAMASI0 ZEPEDA ARAGON, ASSOCIATE ENGINEERING AND TECHNICAL SERVICES-
ENGINEER CAPITAL PROJECTS
REVIEWED BY: SASHA MESTETSKY SENIOR ENGINEER
EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER
JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL
SERVICES
Roger S. Bailey Kenton L. Alm
General Manager District Counsel
ISSUE
Authorization from the Board of Directors (Board) is required to execute a construction contract change
order in an amount greater than $200,000.
BACKGROUND
The public sewer main located within the easement at Via Ferrari and Brookwood Drive in unincorporated
Lafayette requires replacement. This sewer crosses Murderer's Creek and is next to Brookwood Park.
The 8-inch diameter sewer main was installed by the developer in 1976 and originally ran beneath the
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creek. Since then, the creek has eroded and was most recently undermined during heavy rain events in
2019. Currently, the sewer is exposed within the creek and was repaired with a short-term solution to
stabilize and prevent the possibility of leaks. The short-term repair allowed Central San the time to
evaluate, design, obtain permits, and coordinate a long-term solution for the sewer replacement, which also
benefited the nearby residents by removing the temporary bypass systems and 24-hour monitoring by the
Collection System Operations Division (CSOD).
The long-term solution consists of building a new aerial creek crossing at the same location that will span
over the creek and be supported by structural concrete piers. The design considers future erosion of the
creek and for a 100-year storm event. Staff prepared the design with the help of geotechnical and
structural engineering consultants and has received all permits needed for the construction work.
Staff included the proposed work as an additive bid item under the Walnut Creek Sewer Renovations,
Phase 14, District Project (DP) 8460 this year and received a high estimate from the awarding contractor.
Thus, it was recommended to rebid the work. However, since then, the sewer renovation project that was
scheduled to include this work has been delayed.
Time is of the essence; therefore, staff requested change order proposals from its current sewer
contractors and received an acceptable price from Cratus, Inc. (Cratus), which is the contractor hired for
the Danville Sewer Renovations, Phase 3, DP 8456. The work is expected to begin the third week of this
month and be completed by late October of this year to meet the Department of Fish and Wildlife permit
restrictions. There is a lawsuit between the homeowners adjacent to the project and county as well as the
Park District. The project pipe alignment and reconstruction does go through the properties of those
homeowners, who are aware and in agreement with the project work under this change order.
ALTERNATIVES/CONSIDERATIONS
The sewer requires replacement, therefore, the Board has very limited options, but could consider
including the work and re-bid under another collection system sewer renovation project or as a stand-alone
project. This would delay the work and the permits would have to be extended. Staff does not recommend
this approach since the repair completed is considered temporary and continued erosion of the creek will
increase the risk of failure and require additional monitoring by CSOD.
FINANCIAL IMPACTS
The total estimated cost to complete this work is $320,000, which includes $250,000 to Cratus, and
$70,000 for construction management and contingency. The change order would be funded by the
Collection System Sewer Renovation - Phase 1, DP 8451. There is adequate funding in DP 8451 for this
work. The Fiscal Year 2020-21 Budget for DP 8451 is $4,027,000 as shown on page 194 of the District
Budget.
For construction cost comparison, the contractor that bid the work under DP 8460 provided an estimate of
$325,000 to complete the work. The Engineer's estimate is $250,000.
COMMUNITY OUTREACH
Staff has been communicating with the impacted residents at Via Ferrari and Brookwood Drive since 2019
related to the sewer repair and replacement work. Most recently, on Thursday, August 8, 2020, staff met
with the property owners to discuss the construction of the aerial creek crossing, the anticipated schedule,
and to receive feedback and concerns about the work.
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COMMITTEE RECOMMENDATION
The Engineering and Operations Committee reviewed this matter at the August 12, 2020 meeting and
recommended approval of the change order.
RECOMMENDED BOARD ACTION
Authorize the General Manager to execute a construction contract change order in the amount of $250,000
with Cratus, Inc. to include the Via Ferrari Sewer Replacement under the Danville Sewer Renovations,
Phase 3, District Project 8456.
Strategic Plan Tie-In
GOAL ONE: Customer and Community
Strategy 1—Deliver high-quality customer service
GOAL TWO: Environmental Stewardship
Strategy 1—Achieve 100% compliance in all regulations
GOAL FOUR: Workforce Development
Strategy 4—Meet or exceed industry safety standards
GOAL FIVE:Infrastructure Reliability
Strategy 2—Execute long-term capital renewal and replacement program, Strategy 3—Protect personnel and assets
from threats and emergencies
GOAL SEVEN:Agility andAdaptability
Strategy 1—Maintain a safe working environment for employees and the public during the COVID-19 pandemic
August 20, 2020 Regular Board Meeting Agenda Packet- Page 65 of 200