Addendum 1.pdf

Addendum No.1

Stream Maintenance by Contractors

SD202523

CITY OF LIVERMORE

COMMUNITY DEVELOPMENT DEPARTMENT

ADDENDUM NO. 1

TO THE

STREAM MAINTENANCE BY CONTRACTORS

PROJECT SD202523

IN THE CITY OF LIVERMORE

June 26, 2025

This addendum consists of 5 pages: this 1-sheet, 2 pages of responses to bidder questions, and 2 pages of pre-bid meeting sign-in sheet. All prospective bidders for the above referenced project are to be aware that the following changes, additions, and/or clarifications shall be included as an integral part of the contract drawings and specifications for the above referenced project and that they are bound by all conditions set forth therein. This Addendum does not change the Bid

Opening date which remains Thursday, July 3, 2025, at 2:30p.m.

THE BIDDER SHALL SIGN AND INCLUDE THIS FORM IN HIS SEALED BID PACKAGE

AND/OR FILL IN THE ADDENDUM NUMBER ON THE BID PROPOSAL, SECTION 3,

PAGE 15 OF THE PROJECT SPECIFICATIONS AS ACKNOWLEDGMENT OF RECEIPT.

FAILURE TO INCLUDE THIS FORM AND/OR FILL IN THE ADDENDUM NUMBER IN

THE BID PROPOSAL MAY BE CAUSE FOR THE DISQUALIFICATION OF HIS BID.

Leo Sum, P.E.

Project Engineer

Company Name

Date Representative

RESPONSE TO BIDDER QUESTIONS

1. Question: How is the existing sediment determined to be “clean gravel” before off-hauling to the

Zone 7 Material Stockpiling Yard?

Response: Generally, the existing native gravel material taken out of the Arroyo Mocho is already clean and may not require additional filtering or sorting of material. However, there are some vegetation and trash removal to be taken place at the site; non-gravel material such as the revetment logs, existing sakrete, and other vegetations are to be removed from the “clean gravel” stockpile material off hauled to Zone 7.

2. Question: Are the contractors required to obtain any specific permits for the project?

Response: All necessary permits, including the environmental permits and Zone 7 encroachment permit, will be provided by the City. As mentioned in the Special Conditions of Division 00 in the

Contract Documents, issuance of the Notice to Proceed is contingent on the City of Livermore receiving formal approval from regulatory agencies to proceed with the work in the creek.

3. Question: What is the responsibility of the Contractor to ensure environmental compliance?

Response: The City will provide a biologist to the Contractor for environmental training and biological monitoring during the construction of the project. Contractors are subject to attend environmental training hosted by the biologist at the start of construction and will be monitored during construction to satisfy all environmental requirements as stated within the Stream

Maintenance Program Manual (attached in the Appendices as part of the Contract Documents) and environmental permits obtained from the US Army Corps of Engineers, California

Department of Fish and Wildlife Servies, and Regional Water Quality Control Board.

4. Question: Currently, the Arroyo Mocho is dry; will there be any need for dewatering onsite?

Response: The City has coordinated with Zone 7 to pause the water release at the Arroyo Mocho between September 5, 2025 to October 3, 2025, which should allow Contractors enough time to perform the necessary creek work to complete the project without the need of major dewatering at the Site. However, the Site is still located where groundwater levels may be high, so there may be some encounter of groundwater while excavating. As a result, dewatering is included as a bid item, but the City does not anticipate any major dewatering need since the creek is dry and well-coordinated with Zone 7 to not release water during construction.

5. Question: Can the Contractor dispose the revetment logs to a private landowner?

Response: No. All gravel material shall be off hauled to the Zone 7 Material Stockpiling Yard. All non-gravel material shall be off hauled to a certified dump site. Attached in the Appendices is an existing soils lab report sampling the soil at the Arroyo Mocho. However, the Contractor is responsible for any additional fees, material testing, waste manifests, and other items as necessary to properly dispose of the material.

6. Question: How often should the Contractors be expecting the City Inspectors to monitor the status of the Project?

Response: City inspectors will aim to be at the job site daily.

7. Question: Will the City accept other contractor licenses besides Class A?

Response: No, the City will only be accepting Class A license for the project to ensure finding a

Contractor qualified for the Project.

8. Question: At the stockpile site, what are the requirements to bring materials to the site?

Response: Contractor will need a key to access the Zone 7 Material Stockpiling Yard, which the

City will coordinate and obtain. City will also obtain an encroachment permit to allow the

Contractor access into Zone 7 property at both the Arroyo Mocho Site by Holmes Street and entry to the Z7 Stockpiling Yard.

9. Question: Once the material is dumped at the site, do we need a piece of equipment to create a big pile?

Response: Contractor is to push all off-hauled gravel material into one discrete pile to the satisfaction of Zone 7 prior to final project acceptance. The City has no requirements on specific equipment to create the pile.

10. Question: Once the material is dumped at the stockpile site, are there any erosion control measures that need to be installed around the stockpile created?

Response: There are no erosion control measures that need to be installed around the stockpile created.

11. Question: Will the City accept proposals for archaeological monitoring for this project?

Response: City will not be accepting proposals for archaeological monitoring.