Columbia Sewer Interceptor Hydraulic Improvements Project

CONTRACT DOCUMENTS
Columbia Sewer Interceptor Hydraulic Improvement Project
TUOLUMNE UTILITIES DISTRICT
October 2026

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PART 4 TECHNICAL SPECIFICATIONS
DIVISION 1 GENERAL REQUIREMENTS
01140 Environmental Protection
01300 Submittals
01500 Construction Facilities and Temporary Controls
01700 Contract Closeout
DIVISION 2 SITE WORK
02203 Trench Excavation and Backfill
02370 Slope Protection and Erosion Control
02530 Sewer Pipe
02540 Cast-In-Place SSMH
02545 Precast Concrete Sectional Manholes
02705 Paving and Surfacing
03400 Precast Concrete
03600 Nonshrink Grout
APPENDIX A Traffic Control Plan
APPENDIX B Caltrans Encroachment Permit
APPENDIX C Manhole Specifications and Details
APPENDIX D Construction Plans
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INVITATION TO BID
Sealed proposals for the construction of the Columbia Sewer Interceptor Hydraulic
Improvement Project addressed to the Tuolumne Utilities District, 18885 Nugget
Boulevard, Sonora, California 95370, will be received at the office of the District until
2:00 p.m., local time, on October 30th, 2026, and will then be publicly opened and read.
In general, the project will consist of the installation of 2088' of 12" sewer main, seven sewer
manholes, and appurtenances from the Pedro Y Intersection to Old Sonora-Columbia Rd.
Drawings and Specifications may be examined in the office of the Tuolumne Utilities District,
18885 Nugget Boulevard, Sonora, California 95370. To request an Invitation to Bid and a digital
copy of the plans and specifications, please contact Rich Pitcher at (209) 532-5536 ext. 576
rpitcher@tudwater.com. Project information and addenda can be found on the District's website:
https://tudwater.com/development-services/bids/.
A mandatory pre-bid conference will be held at 18885 Nugget Boulevard, Sonora, California at
10 a.m. on October 14th, 2026. This will be followed by a project site visit. Proposals will only be
accepted from contractors represented at the pre-bid conference.
This is a public works project and the contractor's and all subcontractor's employees must be
provided certain benefits pursuant to Section 1720 et. seq. of the Labor Code, including the
payment of prevailing wage rates, if prevailing wage rates have been established by DIR. The
Owner has obtained from the Director of the Department of Industrial Relations the prevailing
wage rates applicable to the work. Copies are on file at the Owner's office. The contractor is
responsible for determining which wage classifications are applicable to this project. (Labor Code
Section 1773.2.) Contractor may also obtain them at the DIR website:
http://www.dir.ca.gov/OPRL/dprewagedetermination.htm
All contractors and subcontractors who bid or work on any public works project must be registered
with the Department of Industrial Relations (DIR) and pay an annual fee. No contractor or
subcontractor may be listed on a bid proposal for a public works project or be awarded a public
works contract unless registered with DIR. The contractor must post all job site notices required
by regulation. This project is subject to compliance monitoring and enforcement by DIR.
Payment for the work accomplished will be made monthly. A portion of the amount earned will
be withheld to ensure performance under the Contract. Substitution of securities for the monies
withheld is permitted by the Contract Documents as an option open to the Contractor, pursuant
to the provisions of Section 22300 of the Public Contracts Code.
Proposals shall be prepared in accordance with the requirements set forth in the Contract
Documents, on the forms therein or copies thereof. Upon being awarded the contract, Contractor
shall provide a 100% Public Works Payment Bond and a 100% Performance Bond.
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No Proposal will be accepted from a contractor who has not been licensed in accordance with the
laws of this State to perform the work herein described and who does not possess a Class A
license or its equivalent for the type of work called for under this project.
The Contract time for performance is 150 calendar days from the date specified in the written Notice to
Proceed. Failure to complete the work within the time allotted may result in the imposition of liquidated
damages, as outlined in the Instructions to Bidder.
The District desires to have the work completed no later than May 28, 2027, but the date of completion will
depend on when the Notice to Proceed is issued and potential delays due to weather.
For information concerning the proposed work contact: Mr. Rich Pitcher, Collections Superintendent, at the
Tuolumne Utilities District (209) 532-5536 ext. 576.
The District reserves the right, in its sole discretion, to award the Contract, to reject any or all Bids, to re-Bid,
to waive inconsequential deviations from Bid requirements, to reject nonconforming, nonresponsive, non-
responsible, or conditional Bids, and to postpone the award of the Contract for a period of time which,
however, shall not extend beyond 90 days from the bid opening date.
As used in the Contract Documents, "District" and "Owner" all refer to the Tuolumne Utilities District.
10/2/26
By: ____________________________________ Date:
Erik Johnson, District Engineer
Tuolumne Utilities District
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INSTRUCTIONS TO BIDDERS
1. CONTRACT DOCUMENTS
a. FORMAT
The Contract Documents are divided into parts, divisions, and sections for
convenient organization and reference. Generally, there has been no attempt to
divide the Specification sections into work performed by the various building
trades, work by separate subcontractors, or work required for separate facilities in
the project.
b. DOCUMENT INTERPRETATION
The Contract Documents governing the work proposed herein consist of the Bid
Documents, Contract, and Drawings and Specifications, all material bound
herewith, addenda to the foregoing, and material incorporated by specific
reference. The Contract Documents are intended to be mutually cooperative and
to provide all details reasonably required for the execution of the proposed work.
Should there be any doubt as to the meaning or intent of the Contract Documents,
the Bidder should request, in writing, at least 6 working days prior to bid opening,
an interpretation from the Engineer. Any interpretation or change in the Contract
Documents will be furnished to all Bidders receiving a set of the documents.
Bidders shall submit with their Proposals, or indicate receipt of, all Addenda. The
Owner will not be responsible for any other explanation or interpretations of said
Documents.
2. GENERAL DESCRIPTION OF THE PROJECT
A general description of the work to be done is contained in the Invitation to Bid. The
scope is indicated on the accompanying Drawings and specified in other parts of these
Contract Documents.
3. LICENSING REQUIREMENTS FOR CONTRACTORS
Bidders and their proposed subcontractors shall hold such licenses as may be required
by the laws of the State for the performance of the work specified in the Contract
Documents, including a Class A license or its equivalent for the type of work called for
under this Contract. Any Bid submitted to the Owner by a Contractor who is not licensed
in accordance with the California Contractors State License Law, Business and
Professions Code Section 7000 et seq., or in violation of Business and Professions Code
Section 7028.15, shall be considered non-responsive and will be rejected by the Owner.
4. BIDDER'S UNDERSTANDING
Each Bidder must be aware of the conditions relating to the execution of the work, and it
is assumed that they will inspect the site and make themselves thoroughly familiar with
the site and of all the Contract Documents. Failure to do so will not relieve the successful
Bidder of their obligation to enter into a Contract and complete the contemplated work in
strict accordance with the Contract Documents. The Bidder's attention is called to the
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General Conditions and the Site Conditions section of the Technical Specifications
regarding Bidder's obligation to verify the complete satisfaction of all information
concerning site and subsurface conditions. Each Bidder shall be informed of, and the
Bidder awarded a Contract shall comply with, Federal, State and local laws, statutes, and
ordinances relative to the execution of the work. This requirement includes, but is not
limited to, applicable regulations concerning minimum wage rates, nondiscrimination in
the employment of labor, protection of public and employee safety and health,
environmental protection, the protection of natural resources, fire protection, burning and
non-burning requirements, permits, fees, and similar subjects.
5. TYPE OF PROPOSAL
LUMP SUM
When the Proposal for the work is submitted on a lump sum basis, a total lump sum price
shall be submitted in the appropriate place along with amounts for the individual portions
of the work. The total amount to be paid to the Contractor shall be the amount of the lump
sum proposal as adjusted for additions or deletions resulting from changes in construction;
however, no changes in contract price will be made for any variance between installed
quantity and quantity shown on the Drawings if such variance is less than two (2) percent
for quantities in any separate bid item. The Bidder shall furnish a breakdown on the lump
sum bid if required in the Proposal.
6. PREPARATION OF PROPOSALS
All blank spaces in the Proposal form must be filled in, preferably in BLACK ink, in both
words and figures where required. No changes shall be made in the phraseology of the
forms. Written amounts shall govern in case of discrepancy between the amounts stated
in writing and the amounts stated in figures. In case of discrepancy between unit prices
and totals, unit prices will prevail.
Any Proposal shall be deemed non-responsive and not in compliance which contains
omissions, erasures, alterations, or additions of any kind, lack of signatures on the
appropriate documents, or prices uncalled for, or in which any of the prices are obviously
unbalanced, or which in any manner shall fail to conform to the conditions of the published
Invitation to Bid.
The Bidder shall sign the Proposal in the blank spaces provided. If Bidder is a corporation,
the legal name of the corporation shall be set forth above, together with the signature of
the officer or officers authorized to sign contracts in behalf of the corporation. If signature
is by an agent, other than an officer of a corporation or a member of a partnership, a
notarized power-of-attorney must be on file with the Owner prior to opening of Proposals
or submitted with the Proposal, otherwise the Proposal will be regarded as not properly
authorized.
7. STATE AND LOCAL SALES AND USE TAXES
State and local sales and use taxes, as required by the laws and statutes of the State and
its political subdivisions, shall be paid by the Contractor. Prices quoted in the Proposal
shall include all sales and use taxes.
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8. SUBMISSION OF PROPOSALS
All Proposals must be submitted at the time and place and in the manner prescribed in the
Invitation to Bid. Proposals must be made on the Proposal forms provided herein or
photocopies of same. Each Proposal must be submitted in a sealed envelope, so marked
as to indicate its contents without being opened and addressed in conformance with the
instructions in the Invitation to Bid. The envelope shall also be marked to indicate the
Bidder's name and mailing address and the project title.
9. FACSIMILE OR WRITTEN MODIFICATION OF PROPOSAL
Any Bidder may modify their bid by facsimile or written communication at any time prior to
the scheduled closing time for receipt of bids, provided such communication is received
by the Owner prior to the closing time. The facsimile or written communication should
state the addition or subtraction or other modification so that the final prices or terms will
be clear to the Owner when the sealed bid is opened.
10. NAMING OF SUBCONTRACTORS
Bidder shall submit with Proposal the names and business addresses of each
subcontractor who will perform work under this Contract in excess of one-half of one (1)
percent of the amount of the total bid and shall list the portion of the work which will be
done by such subcontractor. If the Bidder fails to specify a subcontractor for any portion
of the work to be performed under the Contract, the Bidder agrees to perform that portion
of the work themselves.
11. WITHDRAWAL OF PROPOSAL
Any Proposal may be withdrawn prior to the scheduled time for the opening of Proposals
either by facsimile or written request. No Proposal may be withdrawn after the time
scheduled for opening of Proposals, unless the time specified in Article, AWARD OF
CONTRACT, of these Instructions to Bidders shall have elapsed.
12. BID SECURITY
Proposals must be accompanied by a bid bond issued by a Surety authorized to issue
such bonds in the state where the work is located, in an amount not less than 10 percent
of the total amount of the Proposal. This bid security shall be given as a guarantee that
the Bidder will not withdraw Proposal for a period of 90 days after bid opening, and that if
awarded the Contract, the successful Bidder will execute the attached Contract and furnish
the required Performance Bond, Payment Bond, and Insurance Certificates.
Cash or certified checks will not be accepted as bid security.
The Attorney-in-Fact who executes this bond in behalf of the Surety must attach a
notarized copy of their power-of-attorney as evidence of their authority to bind the Surety
on the date of execution of the Bond.
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