CITY OF SEATTLE

Seattle City Light

IMPROVEMENT OF: GORGE DAM POWERHOUSE ROCKFALL MITIGATION

SPEC. No.: 3817

FUNDED BY: SCL

PW#: 2026-020

ORDINANCE No.: 127362

ADVERTISE: June 24, 2026

BIDS OPEN: July 15, 2026

SEATTLE, WASHINGTON

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City of Seattle

GORGE DAM POWERHOUSE ROCKFALL MITIGATION

Bid Opening: July 15, 2026, 2:00 P.M.

Ordinance No. 127362

PW# 2026-020

PROJECT LOCATION: This Project is generally located behind and upslope of the Gorge Dam Powerhouse, Whatcom County.

PROJECT DESCRIPTION: This Project consists of the following elements of Work: installation of rockfall mitigation measures consisting of rock dowels and cable lashings.

ESTIMATE: The Engineer's Estimate for this Project is $220,000 (before tax).

PRE-BID SITE INSPECTION: Bidders must attend 1 of the following mandatory pre-bid site inspections, which will be held on the following dates:

1. Monday, June 29, 2026, at 10:00 AM. Meet at the Skagit Video Conference Room, 172 Seattle

City Light Street (by Helipad) located in Newhalem, WA at milepost 120 on State Route 20.

2. Tuesday, June 30, 2026, at 10:00 AM. Meet at the Skagit Video Conference Room, 172 Seattle City Light Street (by Helipad) located in Newhalem, WA at milepost 120 on State Route 20.

Owner representatives and meeting attendees will then travel to the site for a tour.

No Bid will be accepted from any Bidder who does not attend at least 1 of the mandatory pre-bid site inspections.

PAID SICK AND SAFE TIME: Bidders must understand the requirements of SMC 14.16 and RCW 49.46 and demonstrate compliance prior to Award.

QUESTIONS: Written questions must be submitted via email to Ryan.Brady@seattle.gov no later than 5:00 p.m. on the Thursday before the Bid Opening Date.

OBTAINING BID DOCUMENTS: Contract Documents, contacts and Bid instructions are available at https://procurement.opengov.com/portal/seattle.

https://procurement.opengov.com/portal/seattle

The City of Seattle

Department of Finance and Administrative Services

Project Manual for

PW# 2026-020

As Authorized by Ordinance No. 127362

Funding Source: SCL

Prepared by

Seattle Public Utilities

For

Seattle City Light

Approved:

Manager, Generation Project Management Program Date

APPROVED FOR ADVERTISING

FAS Purchasing and Contracting

Seattle, Washington 20

BY:

FAS Purchasing and Contracting Director

6/18 26

CERTIFICATION

GORGE DAM POWERHOUSE ROCKFALL MITIGATION Page 1

CERTIFICATION

The technical material and data contained in this document were prepared under the supervision and direction of the undersigned, whose seal, as a Professional Engineer licensed to practice as such, is affixed below.

Specifications in Division 0 and 1 were developed by or under the supervision of:

Ryan Brady, P.E.

Seattle Public Utilities 700 5th Avenue, Suite 4900 Seattle, WA 98124 Office: 206-684-3617

16 Jun 2026

TABLE OF CONTENTS

Advertisement for Bids Signature Page Certification Table of Contents

DIVISION 0 BID AND CONTRACT REQUIREMENTS

Bid Requirements

0-01.1 Instructions to Bidders 0-01.2 Bidders Checklist 0-01.3 Bid Forms

Contract Requirements

0-02.1 Agreement Form 0-02.2 Amendments and Special Provisions 0-02.3 Plans and Specifications 0-02.4 Location of Project 0-02.5 Nature of Improvement

DIVISION 1 GENERAL REQUIREMENTS Page No.

1-01 Definitions and Terms

1-02 Bid Procedures and Conditions

1-07 Legal Relations and Responsibilities to the Public

1-09 Measurement and Payment

1-10 Temporary Traffic Control

DIVISION 8 MISCELLANEOUS CONSTRUCTION

8-23 Rockfall Mitigation

Appendix

Traffic Control Plan

Permits

City Forms Payment and Performance Bond Bond In Lieu Of Retained Funds Supplemental Bidder Responsibility Criteria Form Subcontractor Approval Application Contractor’s Shop Drawing Review and Approval Request Project Labor List - Contractor Substitution Request Form Request For Approval Of Material Sources Seattle City Light Spill Notifications Procedures Request for Information/Design Clarification/Variation Request Submittal Transmittal and Response Construction Stormwater Pollution Prevention (CSWPP) Inspection Form

Addenda and Modifications

Note: Drawings under separate cover.

BID REQUIREMENTS

INSTRUCTIONS TO BIDDERS SECTION 0-01.1

Rev Apr 2023

I. GENERAL

This Contract will be administered by the Director of Seattle City Light, subject to the approval and acceptance of the Director of Finance and Administrative Services. ANY QUESTIONS REGARDING THIS PROJECT

SHOULD BE DIRECTED TO THE FOLLOWING:

Before Bid Opening: Ryan Brady Public Works Contracts Section

Seattle Public Utilities 700 5th Avenue, Suite 4900 P.O. Box 34018 Seattle, Washington 98124-4018 Email: Ryan.Brady@seattle.gov

After Bid Opening and Before Execution:

Purchasing and Contracting FAS_PW_Admin@seattle.gov Phone (206) 684-0444

After Execution: Construction Management Division Seattle City Light

700 5th Avenue, Suite 3200 P.O. Box 34023 Seattle, Washington 98124-4023 Phone (206) 386-3074 Email:SCL_Construction_Management@seattle.gov

INSTRUCTIONS TO BIDDERS SECTION 0-01.1

Rev Apr 2023

II. BID OPENING

The authorized Bid Forms must be submitted as specified in Section 1-02.9(1). Bids received will be opened and read aloud via Microsoft Teams following the 2:00 p.m. Bid submittal deadline on the following date:

JULY 15, 2026

No attendees will be allowed to physically attend the public Bid opening. See Section 1-02.12 of the Standard Specifications for live Microsoft Teams broadcast information.

III. TIME OF COMPLETION

Work must begin immediately on the Notice To Proceed Date in the Written Notice from the Engineer, Seattle City Light, and after the date of such notice must be physically completed within the following period per Section 3 of the Agreement:

80 WORKING DAYS

IV. LIQUIDATED DAMAGES

If the successful Contractor fails to complete Work within the time set forth above, they must be charged Liquidated Damages per Section 4 of the Agreement Form.

If the Work is not Substantially Complete within the Contract Time, the Contractor must pay to the Owner, as Liquidated Damages, the sum of $500.00 for each Working Day that the Work has not achieved Substantial Completion exclusive of those days where the Engineer has granted an extension of time.

After Substantial Completion, for each Working Day that the Contractor fails to achieve Physical Completion within the Contract Time, the Contractor must pay to the Owner, as Liquidated Damages, the sum of $250.00 for each Working Day that the Work has not achieved Physical Completion exclusive of those days wherefore the Engineer has granted an extension of time.

See Section 1-08.9 for additional details.

BIDDER'S CHECKLIST SECTION 0-01.2

Rev Jul 2025

1. Bid submittal:

a. Electronic Bid Submittal:

Submit Bids only through OpenGov. Bids are due at 2:00 PM on the Bid Opening Date. PC will accept Electronic Signature for the Declaration and the Bidder/Subcontractor List, if applicable.

Required documents to support the Bid that are due after the Bid submittal deadline must be submitted as a PDF file(s) with a maximum individual file size of 15MB. The Bidder must email the PDF file(s) by the appropriate deadline to the following address:

FAS_PWSecureBid@seattle.gov.

Identify both the email and the attached PDF file(s) with the full Public Works Contract Number (PW#) and name of the Bidder (e.g. “PW# 2020-001 – Joe’s Construction”).

2. With regard to Section 0-01.3(1) BID:

a. Have you enclosed with your Bid the Bid Guaranty for not less than 5% of the maximum Bid amount that could be awarded including retail sales tax?

b. Have you Bid on all items including Additives, Alternates, and Deductives (when indicated)?

c. Failure to provide a hard copy original Bid Guaranty with a USPS postmark no later than 1 Business Day following the Bid Opening Date may result in the Bid being declared non-responsive.

3. With regard to Section 0-01.3(2) DECLARATION:

a. Have you provided all information requested?

b. Has the official authorized to represent the Bidder signed the declaration?

c. Have you acknowledged all addenda?

4. With regard to Section 1-02.2 SUPPLEMENTAL BIDDER RESPONSIBILITY CRITERIA:

a. The Supplemental Bidder Responsibility Criteria Form and any additional documentation must be submitted to PC within 3 Business Days of receipt of request. See Section 1-02.2.

BID FORMS SECTION 0-01.3

GORGE DAM POWERHOUSE ROCKFALL MITIGATION Page 1

The Bid Forms can be found as a separate document at: https://procurement.opengov.com/portal/seattle https://procurement.opengov.com/portal/seattle

CONTRACT REQUIREMENTS

AGREEMENT FORM SECTION 0-02.1

GORGE DAM POWERHOUSE ROCKFALL MITIGATION Page 1 of 3

This agreement by and between the Director of Finance and Administrative Services, acting on behalf of The City of Seattle, a municipal corporation of the State of Washington, hereinafter referred to as the Owner, and , hereinafter referred to as the Contractor, witnesseth that in accordance with the terms and conditions of Contract PW# 2026-020 awarded the day of , 20 the parties agree as follows:

SECTION 1. That the Contractor must do or cause to be done all Work and must furnish or cause to be furnished all tools, Materials, Equipment, Supplies and labor necessary to improve as ordered by Ordinance No. 127362 in all respects, in accordance with and as described in the Contract now on file in the office of the Engineer for the following Awarded Contract Price:

Base Bid ................................................... $

State Sales Tax (@8.3%) ......................... $

Awarded Contract Price ........................... $

The Contractor must provide and bear the expense of all Equipment, Material, Supplies, work, and labor of any sort whatsoever that may be required for the transfer of Materials and for constructing and completing the Work provided for in this Contract and every part thereof, except such as are mentioned in the Contract furnished by the Owner.

SECTION 2. The parties are bound by the Constitution and Laws of the State of Washington and the Charter, Ordinances, Rules and Regulations of the City of Seattle and by all applicable federal laws and government regulations, which provisions are incorporated by reference herein.

For the convenience of the parties of this Contract it is mutually agreed that any claims or causes of action which the Contractor has against the Owner arising from this Contract must be brought within 180 calendar days from the Completion Date of the Contract. It is further agreed by the parties that any such claims, disputes, or causes of action which cannot be resolved pursuant to the procedures set forth in the Contract Documents must be brought only in the Superior Court of King County. The parties understand and agree that the Contractor's failure to bring suit within the time period provided will be a complete bar to any such claims or causes of action.

SECTION 3. The Contractor must begin the Work of the Contract on the Notice to Proceed Date stated in the Notice to Proceed issued to said Contractor by the Engineer, and to carry said Work on regularly and without interruption thereafter (unless the Engineer otherwise, in writing, specifically directs) with such forces as to physically complete said Work in a manner acceptable to the Engineer within

80 WORKING DAYS

after such notice to begin Work; the time of beginning, rate of progress, and time of completion being essential and material provisions of the Contract.

GORGE DAM POWERHOUSE ROCKFALL MITIGATION Page 2 of 3

SECTION 4. If the Work is not Substantially Complete within the Contract Time, the Contractor must pay to the Owner, as Liquidated Damages, the sum of $500.00 for each Working Day that the Work has not achieved Substantial Completion exclusive of those days where the Engineer has granted an extension of time.

After Substantial Completion, for each Working Day that the Contractor fails to achieve Physical Completion within the Contract Time, the Contractor must pay to the Owner, as Liquidated Damages, the sum of $250.00 for each Working Day that the Work has not achieved Physical Completion exclusive of those days wherefore the Engineer has granted an extension of time.

The Owner and the Contractor agree that establishing the precise amount of actual damage incurred by the Owner due to delay would be difficult to determine. The Contractor hereby agrees the amounts set forth as Liquidated Damages are reasonable amounts and are not a penalty.

SECTION 5. The Owner agrees to employ the Contractor to complete the Work in accordance with the Contract and agrees to pay for the same according to the schedule of Bid Item prices listed in the Bid Form, at the time and in the manner and upon the conditions provided for in the Contract.

The Contractor must inform all Subcontractors who work on the Improvement named in Section 1 of this Agreement of the manner and method of payment and the manner and method of measuring or computing the quantities of subcontracted work.

SECTION 6. In accordance with Chapter 39.12 RCW, the City Charter, and the Project Manual, the Contractor must pay, or cause to be paid to persons employed on or in connection with this Work, not less than the prevailing rate of wage for an hour's work specified for the labor performed.

SECTION 7. The Contractor on behalf of his or her heirs, executors, administrators, successors, and assigns, does hereby agree to the full performance of all the covenants to which the Contractor is obligated under the terms of the Contract.

SECTION 8. It is further provided that no liability is attached to the Owner by reason of entering into this Contract except as expressly provided herein.

SECTION 9. If the Contractor violates any material covenant or provision of this Contract the Owner may: withhold payment due on any work done under the Contract until the Contractor complies with the Contract; order that the Work be stopped, terminate the Contract, debar the Contractor in accordance with SMC 20.70.

GORGE DAM POWERHOUSE ROCKFALL MITIGATION Page 3 of 3

Rev Apr 2023

Contractor must declare option for management of statutory retained percentage of this Contract by checking applicable box below.

Contractor elects to submit a bond in lieu of retained funds.

Contractor hereby elects to have the retained percentage of this Contract held in a non-interest bearing fund by The City of Seattle until 60 days following the Completion Date.

Contractor hereby elects to have The City of Seattle invest the retained percentage of the Contract from time to time as such retained percentage accrues and in accordance with RCW 60.28.011, .021 and .051. Contractor hereby designates:

Name of Financial Institution

Street Address, City, State, Zip Code

City, State, Zip Code of Financial Institution as the repository for the escrow of said funds. Contractor hereby further agrees to be fully responsible for payment of all costs or fees incurred as a result of placing said retained percentage in escrow and investing it as authorized by statute. The City of Seattle is not liable in any way for any cost or fees in connection therewith.

IN WITNESS WHEREOF, the Owner has caused these presents to be signed by the designee of Director of Finance and Administrative Services; and the Contractor has hereunto affirmed his or her signature.

THE CITY OF SEATTLE

Director of Finance and Administrative Services

By Date Director, Purchasing and Contracting

CONTRACTOR

Business Name

By: Date Signature

Printed Name

Title

0-02.2

AMENDMENTS AND SPECIAL PROVISIONS

0-02.3 PLANS, DRAWINGS AND SPECIFICATIONS

The Work must be performed in accordance with these amendments and Special Provisions together with the provisions, insofar as they are applicable, of the following documents:

1. The Engineering Drawings, Sheets 1 through 7 .

2. The City of Seattle Standard Plans and Standard Specifications, which are comprised of:

a. "2026 edition City of Seattle Standard Specifications for Road, Bridge, and Municipal Construction" (hereinafter referred to as the Seattle Standard Specifications).

b. “2026 edition City of Seattle Standard Plans for Municipal Construction”

(hereinafter referred to as the Seattle Standard Plans).

3. The terms and conditions of such permits, agreements, ordinances, regulations, instructions and requirements as may be included in the appendix or otherwise attached hereto.

0-02.4 LOCATION OF PROJECT

This Project is generally located behind and upslope of the Gorge Dam Powerhouse, Whatcom County.

0-02.5 NATURE OF IMPROVEMENT

This Project consists of the following elements of Work: installation of rockfall mitigation measures consisting of rock dowels and cable lashings.

DIVISION 1 GENERAL REQUIREMENTS

SECTION 1-01 DEFINITIONS AND TERMS

1-01.1 GENERAL

Supplement this Section with the following:

The use of the term “must” or “shall” in the Contract documents indicates mandatory legal obligations or requirements of the Contract.

1-01.2 ABBREVIATIONS

1-01.2(1) ASSOCIATIONS AND MISCELLANEOUS

Add the following:

COS City of Seattle DWF Design Web Format

SECTION 1-02 BID PROCEDURES AND CONDITIONS

1-02.2 SUPPLEMENTAL BIDDER RESPONSIBILITY CRITERIA

Delete the first paragraph of this Section and Items 1 through 3 and replace with the following:

The apparent low Bidder must submit the SBRC and any additional documentation to PC within 3 Business Days of receipt of the request or as otherwise acceptable to PC. The documentation must detail the Bidder’s, or Subcontractor’s, experience with the precise experience requirements as stated in the Contract.

1. Compliance History The Bidder must answer questions on the SBRC demonstrating their compliance history and capabilities in performing these categories. The Owner may use a Bidder’s past compliance history as part of the determination of responsibility.

2. Personnel The Bidder certifies, by submitting the SBRC, that it will assign the named personnel to the project.

In the event it becomes necessary for the Bidder to substitute personnel during the life of the Contract, the following provisions apply:

a. Before substituting a new project manager or superintendent, the Contractor must submit for the approval of the Owner, a current resume for the new personnel documenting that the new personnel comply with the supplemental bidder responsibility criteria established for the project.

b. The Owner may suspend the project if the Contractor substitutes a project manager or superintendent without the Owner’s approval. The Contractor is fully liable for the additional costs resulting from the suspension of work and no adjustments in Contract Time resulting from the suspension of work will be allowed.

The Bidder must identify a Project Manager who will provide management and direction to the Bidder’s personnel assigned to the project and will have overall responsibility for executing the work in compliance with the Contract.

The Bidder must identify a Superintendent who will be responsible for overseeing all work activities associated with the Contract and who will not be the same person as the Project Manager. The candidate must have a minimum of three years of experience supervising rock dowel, cable lashing and wire rope anchor installations.

3. Work Experience

The Bidder must document on the SBRC that the Bidder and the Bidder’s personnel or Subcontractor and Subcontractor’s personnel have completed projects, or scopes within a project, of a similar size and scope as this project. Similar size and scope is defined as follows:

a. Installation of rock dowels

b. Installation of cable lashings

Note: Multiple projects may be combined in order to meet the requirements of items a and

b. There must be 3 completed projects, or scopes within a project, that meet each of these 2 experience requirements.

To be considered a responsible Bidder, the Bidder must document on the SBRC that the Bidder and the Bidder’s personnel or Subcontractor and Subcontractor’s personnel have completed 3 projects, or scopes within a project, of a similar size and scope as defined above within the last 5 years.

The Owner will verify that the specified work experience criteria is met by the apparent low Bidder.

It is the Bidder’s responsibility to verify that the names and phone numbers provided for references are current to ensure the Owner’ ability to contact references and verify Bidder work experience. If the Owner is unable to contact references to verify Bidder or Subcontractor experience due to circumstances beyond its control, the Owner reserves the right to determine work experience based on the information available to the Owner.

1-02.4(1) GENERAL

Supplement this Section with the following:

Bidders must attend 1 of the following mandatory pre-bid site inspections, which will be held on the following dates:

1. Monday, June 29, 2026, at 10:00 AM. Meet at the Skagit Video Conference Room, 172 Seattle City Light Street (by Helipad) located in Newhalem, WA at milepost 120 on State Route 20.

2. Tuesday, June 30, 2026, at 10:00 AM. Meet at the Skagit Video Conference Room, 172 Seattle City Light Street (by Helipad) located in Newhalem, WA at milepost 120 on State Route 20.

Owner representatives and meeting attendees will then travel to the site for a tour.

No Bid will be accepted from any Bidder who does not attend at least 1 of the mandatory pre-bid site inspections.

SECTION 1-07 LEGAL RELATIONS AND RESPONSIBILITIES TO THE PUBLIC

1-07.1 LAWS TO BE OBSERVED

1-07.1(2) SAFETY RULES AND STANDARDS

1-07.1(2)A HEALTH AND SAFETY PROGRAM (New Section)

This Section specifies the requirements for compliance with health and safety precautions and controls for projects without hazardous waste operations including the requirements for a Site-Specific Health and Safety Plan (SSSP) and Accident Prevention Program (APP).

This Section specifies procedures for complying with applicable requirements, laws, and regulations related to worker and the public safety and health. It is not the intent of the Owner to develop, manage, direct, and administer the safety and health programs of contractors or in any way assume the responsibility for the safety and health of their employees. It is required that all Contractors adhere to applicable federal, state, and local safety and health standards.

It is not the intent of the Owner to list and identify all applicable safety codes, standards, and regulations requiring compliance by all contractor and subcontractor groups. Contractor and Subcontractors must be solely responsible for identifying and determining all safety codes, standards, and regulations that are applicable to the work.

1-07.1(2)A1 SUBMITTALS

The project Health and Safety Program consists of 2 elements:

1. Site-Specific Health and Safety Plan (SSSP)

2. Health and Safety Plan / Accident Prevention Program (APP) The Contractor must submit both of the Health and Safety Program documents listed above in accordance with Section 1-05.3. The Engineer will review both documents and reserves the right to comment, but the Engineer is not responsible for approval of either document. The Health and Safety Program documents must be submitted to the Engineer no later than 10 Working Days after the preconstruction conference.

1-07.1(2)A2 ACCIDENT REPORTING

Serious accidents such as those resulting in treatment of an injury at a medical facility, response to the Project Site by emergency medical personnel or damage to property other than that of the Contractor must be reported to the Engineer within 24 hours of the occurrence.

A copy of each accident report, which the Contractor or Subcontractors have submitted to their insurance carriers, must be forwarded to the Engineer as soon as possible, but in no event later than 7 Calendar Days after the accident occurred.

1-07.1(2)A3 HEALTH AND SAFETY REPRESENTATIVE

The Contractor must designate a Health and Safety Representative and must ensure that each

Subcontractor designates a Subcontractor's Health and Safety Representative. The Health and Safety Representative must be capable of identifying all hazards and have the authority to stop work and take immediate action to correct the hazard.

The Contractor must authorize each such Health and Safety Representative to resolve safety-related issues raised by the Owner or any of its employees.

Each Contractor's or Subcontractor's Health and Safety Representative must identify himself or herself to the Engineer at the briefing/tailgate conference. The Health and Safety Representative can also be the Superintendent or Lead Worker.

The Health and Safety Representative must verify that all Work is performed in accordance with the

SSSP.

At the daily job briefing and/or tailgate conference, Contractor must provide the Owner's representative in attendance at the meeting all relevant information on the Work to be performed, its location, and the equipment to be used.

The Contractor must provide all safety equipment required for the Work.

At a minimum, all Contractor and Subcontractor personnel, including materialmen and service provider personnel, directly involved in the Work must have:

1. Training or experience in trenching, if work will be in excavations.

Nothing in this Contract must be construed as imposing any duty upon the Owner or any of its employees, including but not limited to the Engineer, with regard to, or as constituting any express or implied assumption of control or responsibility over, Project Site safety, or over any other safety conditions relating to employees or agents of Contractor or any of its Subcontractors, or the public.

1-07.1(2)A4 SITE-SPECIFIC SAFETY PLAN (SSSP)

The Contractor must comply with the requirements of the SSSP. The SSSP must be tailored specifically to the project location, scope of work to be done, and specific to the management that will be on-site during construction. The SSSP must include, at a minimum, the following information:

1. Require compliance with all City, State, and Federal safety rules.

2. Outline a disciplinary policy that is used to enforce safety regulations.

3. Specify by name or position who is responsible for enforcing the disciplinary policy.

4. Specify by name or position who is responsible to enforce the safety items outlined in the SSSP.

5. Specify by name or position of person responsible for ensuring compliance with the SSSP, and applicable safety standards.

6. Describe the means and methods used to discover hazards, violations of WAC standards, or violations of written policies.

7. Specify what training the employees have had to safely complete their tasks.

8. Specify by name or by position who is responsible for ensuring the training outlined in the SSSP is given to employees.

9. Ensure that the SSSP is tailored to and addresses the hazards specific to this job.

10. Specify if the use of additional plans, such as a Demo Plan, or Fall Protection Work Plan will be used. Site-specific “Fall Protection Work Plan” must be provided as required by and must address all the elements contained in WAC 296-155-24505 “Fall Protection Work Plan”.

11. Specify how clear communication to the employees on the standard work rules, policies and procedures must be done.

12. Specify by name or position who is responsible for ensuring this communication occurs.

13. A description of tasks to be undertaken and equipment mobilized for the project and the location of the equipment.

14. Identification of all anticipated hazards likely to be encountered at the Project Site, and control methods to be used for protection of employees.

15. The Contractor must conduct job-site safety meetings on a regular basis as required by WISHA.

16. Emergency phone numbers contacts, and location of the nearest medical facility.

17. A Fall Rescue Plan for work done on the steep slope behind the Gorge Powerhouse.

18. A Silica Dust Control Plan to minimize dust migration to the Gorge Powerhouse.

19. Evaluation of existing anchors as possible anchor points for use during construction. The

Contractor must prove strength of existing anchors (5000 lbs min) for Engineer review and approval.

20. The Contractor must follow all provisions of WISHA WAC 296-24-695 Fire prevention and protection and NFPA 51B Standard for Fire Protection in Use of Cutting and Welding. This includes a hot work permit, any necessary plans and properly trained personnel.

1-07.1(2)A5 HEALTH AND SAFETY PLAN / ACCIDENT PREVENTION PROGRAM (APP)

The Contractor must submit a written Health and Safety Plan / Accident Prevention Program (APP) as required by WAC 296-155-110. The APP must be in a PDF format and tailored specifically to the needs of the Contractor’s workplace. This information is often included in a corporate safety plan. At minimum, the APP must consist of the following items:

1. A Safety Orientation that describes the Contractor’s safety program.

2. How, when, and where to report on the job injuries, including instructions to the locations of first-aid facilities in the workplace.

3. How to report unsafe work conditions, jobsite hazards, and unsafe work practices.

4. Use and care of required personal protective equipment (PPE).

5. Identification of hazardous gases, chemicals, or materials used on the job and instruction about the safe use and action to take after accidental exposure.

6. Roles and responsibilities for ensuring safety programs are followed.

7. Description of the Contractor’s total safety and health program.

8. An “on the job” review of the practices necessary to perform the initial job assignments in a safe manner.

9. Description of training provided to employees to improve the skill, awareness, and competency of all your employees. (Note: All training must include on the job instruction to employees prior to their job assignments).

10. Require compliance with all City, State, and Federal safety rules.

1-07.1(2)A6 SAFETY

The Contractor must comply with all safety and health provisions of the Washington Industrial Safety and Health Act of 1973 (WISHA) as amended, including DOSH Safety and Health Core Rules (Washington Administrative Code [WAC] 296-800), and Safety Standards for Construction Work WAC 296-155, all other applicable federal, state, county, and local laws, ordinances and codes, the requirements set forth herein, and any regulations that may be specified in other parts of this Contract.

In case of conflict or overlap, the provisions more protective of employee safety and health must apply. Failure to become thoroughly familiarized with these safety and health provisions will not relieve the Contractor of responsibility for compliance with the obligations and requirements set forth therein.

The Contractor is solely responsible for:

1. The Contractor’s employees and Subcontractor’s safety.

2. The safety, efficiency, and adequacy of the Contractor’s facilities, equipment, materials and methods.

3. Any damage or injury resulting from the failure, or improper maintenance, use, or operation of the

Contractor’s facilities, equipment, and methods.

4. Conditions of the Project Site, including safety of all persons and property during performance of the work.

5. The Contractor’s employees and Subcontractor’s compliance with the submitted SSSP and the

APP.

These requirements apply continuously and are not limited to normal working hours. The Contractor must take all necessary safety, and other precautions, at all times to prepare for, and perform the work in a safe manner, and to protect people from illness or injury, and prevent property damage.

If hazardous materials are encountered or spilled during the Work, the Contractor must do everything possible to control and contain the material until appropriate measures can be taken. In addition, the Contractor must follow any instruction provided by the Owner.

1-07.1(2)B MEASUREMENT

Measurement for “Health and Safety Program” will be by lump sum.

1-07.1(2)C PAYMENT

1. “Health and Safety Program”, per lump sum.

The Bid item price for “Health and Safety Program” includes all costs for the Work required by

Section 1-07.1(2). Payments for “Health and Safety Program” will be pro-rated in equal monthly payments beginning in the month or pay period in which the Work begins and ending in the month or pay period in which the projected last Working Day occurs, not allowing for Work suspensions.

1-07.6 PERMITS

1-07.6(2) OWNER OBTAINED PERMITS

Supplement this Section with the following:

The Owner has obtained the following permits:

1. Whatcom County Commercial Building Permit (COM2025-00034)

a. The Contractor must add their name as the Contractor to the Whatcom County Commercial Building Permit after the Contract Execution Date. Contact the Engineer before contacting Whatcom County.

Copies of all Owner obtained documents noted above are included in the Appendix.

1-07.9(7) REQUIRED DOCUMENTS

Delete the second paragraph in this Section and replace with the following:

Each progress estimate and final payment must include a statement completed and signed by an authorized representative of the Contractor certifying the prevailing wages have been paid per RCW 39.12.040.

Supplement this Section with the following:

To facilitate the State of Washington review of all Statements of Intent to Pay Prevailing Wages and

Affidavits of Prevailing Wages paid, the Contractor and all Subcontractors and Suppliers must use the following information (verbatim) when completing the forms online:

1. Awarding Agency: Seattle, City of

2. Awarding Agency Address: 700 Fifth Avenue, Seattle, WA

3. Awarding Agency Contact: Alex Katz

4. Awarding Agency Contact Phone Number: 206-600-7464

5. Contract Number: PW#2026-020

6. Project Name: Gorge Dam Powerhouse Rockfall Mitigation

7. Project Site Address or Directions: located behind and upslope of the Gorge Dam Powerhouse, Whatcom County.

1-07.11(5) RECORDS

1-07.11(5)A NOTIFICATION REQUIREMENTS FOR FEDERAL IMMIGRATION ENFORCEMENT

ACTIVITIES (NEW SECTION)

Prior to responding to any requests from an employee or agent of any federal immigration agency including the Immigration and Customs Enforcement, the U.S. Department of Homeland Security, Homeland Security Investigations, Enforcement Removal Operations, Customs and Border Protection, and U.S. Citizenship and Information Services regarding this Contract, Contractor must notify the Engineer immediately. Such requests include, but are not limited to:

1. Requests for access to non-public areas in City buildings and venues (i.e., areas not open to the public such as staff work areas that require card key access and other areas designated as “private” or “employee only”); or

2. Requests for data or information (written or oral) about workers engaged in the work of this Contract or Owner employees.

No access or information shall be provided without prior review and consent of the Owner. The Contractor must request the federal immigration agency to wait until the Engineer is able to verify the credentials and authority of the federal immigration agent and directs the Contractor on how to proceed.

1-07.18 INSURANCE

1-07.18(1) MINIMUM INSURANCE COVERAGE, LIMITS AND OTHER REQUIREMENTS

1-07.18(1)F RESERVED

Delete this Section in its entirety and replace with the following:

1-07.18(1)F PRODUCTS AND COMPLETED OPERATIONS ADDITIONAL INSURED

The Contractor’s CGL insurance must include the Owner as an additional insured for Products and Completed Operations by providing additional insured status on the ISO CG 20 10 11 85 or CG 20 37 endorsement, or by an equivalent policy or endorsement provision. The Products and Completed Operations additional insured status for the Owner must remain in effect for not less than 3 years following the Physical Completion Date or Final Acceptance of the Work (as applicable) by the Owner.

SECTION 1-09 MEASUREMENT AND PAYMENT

1-09.9(1)A FINAL PROGRESS PAYMENT

Delete the 2nd sentence in the first paragraph to read as follows:

The Final Contract Price will be calculated based on a final progress estimate made by the Engineer

SECTION 1-10 TEMPORARY TRAFFIC CONTROL

1-10.2 TRAFFIC CONTROL MANAGEMENT

1-10.2(5) TRAFFIC CONTROL PLANS

1-10.2(5)C GENERAL TRAFFIC CONTROL RESTRICTIONS

Supplement this Section with the following:

Traffic and pedestrian control measures required are indicated on the Owner furnished Traffic Control Plan included in the Appendix of this Project Manual.

1-10.4 MEASUREMENT

Supplement this Section with the following:

Measurement for "Maintenance and Protection of Traffic and Pedestrian Control including Flagging" will be by the lump sum.

1-10.5 PAYMENT

Supplement this Section with the following:

4. "Maintenance and Protection of Traffic and Pedestrian Control including Flagging", per lump sum.

Payment for “Maintenance and Protection of Traffic and Pedestrian Control including Flagging" includes all costs for the Work required to control traffic and pedestrians as specified.

DIVISION 8 MISCELLANEOUS CONSTRUCTION

SECTION 8-23 ROCKFALL MITIGATION (New Section)

8-23.1 DESCRIPTION

Section 8-23 describes the rockfall mitigation elements to be installed on this project:

1. Rock dowels

2. Cable lashings and wire rope anchors

8-23.2 MATERIALS

8-23.2(1) MATERIALS (ROCK DOWELS)

Rock dowels: Rock dowels at a minimum should consist of untensioned, No. 8, Grade 60, hot-dip galvanized, all-thread bars, centralizers, bearing plate, washers, and hex nuts installed within a minimum 2-inch diameter hole (or per manufacturers recommendation) and fully grouted using cement grout. Rock dowels shall have a minimum embedment into rock of 10 feet. The rock dowel design load is equal to

29.0 kips. The minimum yield strength of the bar is 47.4 kips, and the minimum ultimate strength is 63.2 kips.

Bearing Plates: The bearing plate shall conform to ASTM A36. Bearing plates shall be minimum ½-inch-thick flat steel, square in shape, providing a minimum 81 square-inch area for each dowel and with a hole drilled and sized to allow at least a 15-degree skew from normal to the plate in all directions.

Washers: Washers for use with threaded dowels shall provide a continuous load transfer between the tightened hex nut and the bearing plate. Two beveled washers and one flat washer shall be provided with each rock dowel. Beveled washers shall be compatible with the Grade 60 all-thread bar and conform to either ASTM A47 or ASTM A536. Flat steel washers shall conform to the requirements of ASTM F436.

Hex Nuts: Hex nuts shall have hexagonal heads of the heavy-duty type and shall be compatible with the Grade 60 steel all-thread bar. Nuts shall permit a 5-degree misalignment between the bar and bearing plate and still support at least 100 percent of the minimum specified ultimate tensile strength of the Grade 60 steel. Hex nuts shall conform to ASTM A108. Hex nuts shall be sized to fit over galvanized all-thread bar without damaging the corrosion protection. Hex nuts shall be used on threaded portions of rock dowels. Nuts shall develop an ultimate strength of not less than 125 percent of the minimum yield strength of the rock dowels. All-thread bars, bearing plates, washers, and hex nuts shall be hot-dip galvanized in accordance with ASTM A153.

Centralizers: Centralizers shall be plastic or other approved material which is nondetrimental to the Grade 60 steel. Wood shall not be used. The centralizer shall be able to support the rock dowel in the drill hole and position the rock dowel so a minimum of 0.5 inch of grout cover is provided. Centralizers shall permit grout to freely flow up the drill hole. Each rock dowel shall include at least two centralizers placed no more than 6 feet apart.

Cement Grout: Cement grout mixture proportions shall be the responsibility of the Contractor. Grout shall consist of a homogenous, pumpable, stable mixture of Portland cement, water, and admixtures (if used). The water content shall be the minimum necessary for proper placement, but the water-cement ratio shall not exceed 0.45 by weight. Final proportions of materials shall be based on results of tests made on sample mixtures of grout. The minimum compressive strength of a grout cylinder in accordance with ASTM C39 shall be 3,500 psi at 7 days and 6,000 psi at 28 days. The Contractor shall be responsible for sampling, curing, and breaking of grout test cylinders for determining mix design, and all testing shall be done by an independent laboratory approved by the Engineer. Testing should be performed on a sample collected each week that grouting takes place.

Portland cement shall be ASTM C150, Type I, II, or III. Water for mixing cement grout shall meet the requirements of USACE CRD-C 400-63. Water temperature prior to mixing shall be between 50- and 70-degrees Fahrenheit. During periods of cold or hot temperatures, water shall be heated or cooled before mixing grout. Admixtures, which control bleed, reduce water content and retard set, may be used in the grout if recommended by the grout manufacturer, subject to the approval of the Engineer. Any admixtures used shall be compatible with the Grade 60 steel and shall be dosed and mixed in accordance with the manufacturer's recommendations. Grout tubes shall be polyethylene tubing or as recommended by the rock dowel manufacturer/supplier. Inside diameter of grout tubes shall be adequate for the proposed grout mix. Tubes shall be able to withstand the expected grouting pressure. Grout socks shall consist of Williams Form Engineering grout socks S5Z-01 or approved equivalent. At the Contractor’s option, a pre-blended grout mix such as Target Products, Ltd. 1117 Grout (Silica Fume Anchor Bolt Grout) may be proposed for approval by the Engineer. Pre-blended grout, if used, shall be proportioned and mixed in accordance with the manufacturer’s recommendations to achieve the required compressive strengths.

Dry-pack mortar shall consist of one part ASTM C150 Type I or Type I/II Portland cement, 2-½ parts sand that will pass the No. 16 (1.18 millimeter) sieve, and sufficient water to produce a mixture that will just stick together while being molded into a ball with the hands. Mortar should not exude water but leave the hands damp when handled.

8-23.2(2) MATERIALS (CABLE LASHINGS AND WIRE ROPE ANCHORS)

Wire Rope Anchors: Wire rope anchors shall be manufactured from 1-inch diameter rope such as a single leg diameter Geobrugg spiral rope anchor (or equivalent). The wire rope anchors must be of 6x19 construction (or equivalent), independent wire rope core (IWRC) and have a minimum breaking strength of 103.4 kips. The wire rope should be hot-dip galvanized in accordance with ASTM A603.

Wire Rope Cable Lashing: Wire rope shall consist of a 1-inch diameter wire rope, 6x19 classification (or equivalent), with IWRC and a minimum breaking strength of 103.4 kips. The cable lashing should be hot-dip galvanized in accordance with ASTM A603.

Hardware: Wire rope thimbles and eyelets shall be heavy-duty, hot-dip galvanized, with eye and saddle dimension appropriate for a 1-inch wire rope slip. Wire rope clips should be heavy duty and designed for 1-inch diameter wire rope.

Turnbuckle: Turnbuckles should have a minimum working load equal to or greater than 51.7 kips (half the breaking strength of the 1-inch wire rope). Thimbles, clips, and turnbuckles should be galvanized according to ASTM A153.

Centralizers: Centralizers shall be plastic or other approved material which is nondetrimental to the Grade 60 steel. Wood shall not be used. The centralizer shall be able to support the wire rope anchor in the drill hole and position the anchor so a minimum of 0.5 inch of grout cover is provided. Centralizers shall permit grout to freely flow up the drill hole. Centralizer spacing should be no more than 3 feet.

Cement Grout: Cement grout mixture proportions shall be the responsibility of the Contractor. Grout shall consist of a homogenous, pumpable, stable mixture of Portland cement, water, and admixtures (if used). The water content shall be the minimum necessary for proper placement, but the water-cement ratio shall not exceed 0.45 by weight. Final proportions of materials shall be based on results of tests made on sample mixtures of grout. The minimum compressive strength of a grout cylinder in accordance with ASTM C39 shall be 3,500 psi at 7 days and 6,000 psi at 28 days. The Contractor shall be responsible for sampling, curing, and breaking of grout test cylinders for determining mix design, and all testing shall be done by an independent laboratory approved by the Engineer. Testing should be performed on a sample collected each week that grouting takes place.

Portland cement shall be ASTM C150, Type I, II, or III. Water for mixing cement grout shall meet the requirements of USACE CRD-C 400-63. Water temperature prior to mixing shall be between 50- and 70-degrees Fahrenheit. During periods of cold or hot temperatures, water shall be heated or cooled before mixing grout. Admixtures, which control bleed, reduce water content and retard set, may be used in the grout if recommended by the grout manufacturer, subject to the approval of the Engineer. Any admixtures used shall be compatible with the Grade 60 steel and shall be dosed and mixed in accordance with the manufacturer's recommendations. Grout tubes shall be polyethylene tubing or as recommended by the rock dowel manufacturer/supplier. Inside diameter of grout tubes shall be adequate for the proposed grout mix. Tubes shall be able to withstand the expected grouting pressure. Grout socks shall consist of Williams Form Engineering grout socks S5Z-01 or approved equivalent. At the Contractor’s option, a pre-blended grout mix such as Target Products, Ltd. 1117 Grout (Silica Fume Anchor Bolt Grout) may be proposed for approval by the Engineer. Pre-blended grout, if used, shall be proportioned and mixed in accordance with the manufacturer’s recommendations to achieve the required compressive strengths.

Dry-pack mortar shall consist of one part ASTM C150 Type I or Type I/II Portland cement, 2-½ parts sand that will pass the No. 16 (1.18 millimeter) sieve, and sufficient water to produce a mixture that will just stick together while being molded into a ball with the hands. Mortar should not exude water but leave hands damp when handled.

8-23.2(3) REQUIRED SUBMITTALS

8-23.2(3)A SUBMITTALS (ROCK DOWELS)

The Contractor shall submit a detailed Rock Dowel Installation Plan. The plan shall include:

1. The proposed installation sequence and schedule.

2. A list of equipment and material to be used to construct rock dowels

3. The Contractor's drill operators and on-site supervisors shall have a minimum of 1-year experience installing rock dowels. Prior to starting the work, the Contractor shall submit a list identifying the drill rig operators, and on-site supervisor assigned to the project. The list shall contain a summary of each individual's experience and shall be sufficiently complete for the Engineer to evaluate the individual's qualifications. Work shall not be started until written approval from the Engineer is given.

4. A list of the proposed equipment to be used during performance testing.

5. Proposed grout mixture and laboratory test results

6. Proposed method to transport materials and equipment to the dowel locations without damaging

SCL facilities or the trail network, and that minimize removal or damage to vegetation and trees.

8-23.2(3)B SUBMITTALS (CABLE LASHING AND WIRE ROPE ANCHORS)

The Contractor shall submit a Cable Lashing Installation Plan that includes the following:

1. An inclusive list and the manufacturer’s data sheets of all components to be used for the cable lashing anchors and support system (i.e., wire rope anchors, wire rope cable, grout, clips, thimbles, ferrules, steel rings, eyelets, fasteners, etc.).

2. The proposed sequence and anticipated schedule for installing the cable lashing system.

3. The Contractor's drill operators and on-site supervisors shall have a minimum of 1-year experience installing wire rope anchors. Prior to starting the work, the Contractor shall submit a list identifying drill rig operators and on-site supervisors assigned to the project. The list shall contain a summary of each individual's experience and shall be sufficiently complete for the Engineer to evaluate the individual's qualifications. Work shall not be started until written approval from the Engineer is given.

4. A list of the proposed equipment to be used during performance testing.

5. Proposed grout mixture and laboratory test results.

8-23.3 CONSTRUCTION REQUIREMENTS

8-23.3(1) ROCK DOWELS

The work shall include furnishing all labor, materials and equipment for drilling holes for rock dowel installations and providing, installing, grouting, and testing the dowels. Locations and lengths of the rock dowels presented in the project plans and specifications should be considered approximate. The final rock dowel locations and lengths will be determined by the Engineer during construction. If the encountered rock condition is such as to be hazardous, pre-anchoring using safety bolts of adequate size and length may be temporarily installed as mutually agreed upon by the Contractor and Engineer. If required, rock dowels in addition to those described in the Contract Documents shall be installed as directed by the Engineer.

All the equipment used in handling and placing the rock dowels shall be such that it does not damage the steel or corrosion protection coating. Each rock dowel shall be inspected prior to insertion into the hole. Any damage to rock dowels or rock dowel heads shall be repaired prior to insertion, or, if determined by the Engineer to be not repairable, shall be replaced. Minor damage to galvanized coatings shall be repaired by applying a compound meeting the requirements of MIL-P-21035B in accordance with ASTM A780 or as recommended by the rock dowel manufacturer. Installation and testing of rock dowels shall be in accordance with PTI Recommendations and the provisions of this Section.

8-23.3(1)A EXECUTION

Drilling for rock dowels: Just prior to drilling holes for rock dowels, the area shall be inspected and scaled as required for safety and to provide an adequate face to seat the bearing plate. Holes for rock dowels shall be drilled perpendicular to the rockface at approximately the locations shown on the drawings or as directed by the Engineer.