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City of Napa

REQUEST FOR QUALIFICATION

2026-RFQL-054

REQUEST FOR QUALIFICATIONS - CONN DAM STABILITY ASSESSMENT,

SPILLWAY IMPROVEMENTS, AND FEASIBILITY ALTERNATIVES STUDY

RELEASE DATE: October 5, 2026

RESPONSE DEADLINE: October 29, 2026, 4:00 pm

Please refer to the project timeline in this document for all important deadlines.

Request For Qualification #2026-RFQL-054 Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Table Of Contents

1. ABOUT THE CITY

2. DRAFT SCOPE OF SERVICES

3. REQUEST FOR QUALIFICATIONS PROCEDURES

4. Vendor Questionnaire

Attachments:

A - TM_-_Conn_Creek_Dam_Phase_II_Spillway_Assessment_2020-08-17

B - Exhibit A = Services_Agreement_(Professional_Services)_(2024-08-29)

C - Geological_Report_1982_ (1)

D - Memorandum_of_Geologic_Inspection_1965

E - App_B-Conn_Dam_Spillway_Hydraulic_Analysis_28Mar2018-Final_(1)

F - DSOD_Inspection_Reports_on_Spillway_1996-2002 (1)

G -

City_of_Napa_Public_Works_Department_Summary_Report_and_Cost_Estimate_Conn_Dam_Spillway

_Modification_Study_Mar_1,_1968

H - LakeHennesseyBathymetryMap (1)

I -

Hydrologic_Analysis_Report_Conn_Dam_Watershed_and_Spillway_Napa_County,_California_May_19

J - Conn_Dam_-_Technical_and_Budget_Proposal_hydroplus

K - TM5_-_Feasibility_Assessment_for_PMF_Hennessey_Res_04Mar2019_FINAL (2)

L - DSOD_June_5_2026

M - Exibit B Federal Compiance Certifications

N - Exibit B Federal Compiance Certifications

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

1. ABOUT THE CITY

2. Project Background

The City is a charter city located in Napa County, with an estimated population of 80,000. Additional information about the City is available online at www.cityofnapa.org.

Conn Dam is a critical component of the City of Napa's municipal water supply system and impounds Lake

Hennessey, the City's primary local water storage reservoir.

Constructed in the mid-1940s, Conn Dam is an approximately 110-foot-high zoned earthen embankment dam with a crest length of approximately 700 feet. The embankment consists primarily of compacted impervious clay with upstream rock slope protection and impounds approximately 31,500 acre-feet of water.

Since its construction, multiple engineering evaluation and feasibility studies have been completed to assess the dam, spillway, intake facilities, and long-term water supply needs. Major milestones include:

Year Study

1945 Original Construction

1965 DWR Geologic Investigation

1982 DSOD Safety Review, Seismic, Geotechnical, Condition

1986 Hydrologic Analysis Report Conn Dam Watershed and Spillway

1986 Seismic Stability Evaluation

1988 Spillway Predesign Alternatives

1990 Intake Structure Seismic Assessment

1992 Lake Enlargement Feasibility Study

2003 Intake Tower Rehabilitation

2018 Bathymetric Survey and Mapping

2018 DSOD Spillway Re-evaluation

Feasibility Assessment for Probable Maximum Flood Management at

Lake Hennessey

Conn Creek Dam Inundation Study

Supplemental Spillway Investigations

Napa Valley Drought Contingency Plan

2023 Spillway Repairs https://www.cityofnapa.org/

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

2023 Fusegate System Technical and Budget Proposal

2026 DSOD Independent Review

The 2018 Spillway Re-evaluation Program, initiated following the Oroville Dam Spillway Incident, confirmed that the existing spillway no longer satisfies current Probable Maximum Flood (PMF) design criteria.

Subsequent reviews by DSOD requested additional alternatives analyses to identify permanent improvements.

In June 2026, DSOD completed an independent review identifying additional concerns regarding the long-term geotechnical stability of the dam embankment and requested submission of a comprehensive geotechnical investigation report by December 31, 2028.

Separately, Congress reauthorized the Conn Dam Flood Risk Management Feasibility Study under the Water

Resources Development Act of 2022 (WRDA 2022). The City continues to coordinate with the U.S. Army Corps of Engineers to secure General Investigation funding for the federally authorized feasibility study and is working to incorporate the full project in the 2028 workplan.

The City has also submitted an application under the Corps Water Infrastructure Financing Program (CWIFP) for future construction financing.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

2. DRAFT SCOPE OF SERVICES

2.1. 3. Project Purpose

The purpose of this procurement is to retain a highly qualified consulting team capable of supporting the City through multiple phases of investigation, planning, regulatory coordination, and feasibility analysis.

The Consultant shall provide the technical analyses necessary to:

• Satisfy DSOD requirements.

• Support future USACE feasibility studies.

• Evaluate long-term improvements to the spillway.

• Evaluate alternatives for increasing reservoir storage.

• Improve long-term water supply reliability.

• Improve flood protection.

Position the City for future State and Federal funding opportunities.

2.2. 4. Project Objectives

The primary objective is to conduct geotechnical investigations, assess the dam stability under static and seismic conditions including deformation estimates, and mitigate the previously identified spillway deficiencies by recommending alternatives for a spillway that meets all current standards and is capable of safely passing the in flow design flood (Probable Maximum Flood – PMF). A secondary objective is to increase the storage capacity of the reservoir. The City understands that water rights to increase the reservoir storage capacity is a lengthy process and the potential delay impacts will need to be identified in the alternatives.

The Consultant shall accomplish the following objectives.

Objective 1

Dam Investigation

Complete a comprehensive subsurface exploration program satisfying current DSOD guidance and submit by

December 2028, including:

• Exploratory borings

• Cone penetration testing where appropriate

• Test pits

• Foundation characterization

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Laboratory testing

• Installation of vibrating wire piezometers

• Monitoring wells

• Seepage characterization

• Geotechnical Data Report (GDR)

The investigation shall provide all information necessary to evaluate:

• Embankment materials

• Foundation materials

• Gravel lenses

• Seepage conditions

• Phreatic surface

• Shear strength

• Liquefaction potential

• Static stability

• Dynamic stability

The Consultant shall prepare all Alteration Applications required by DSOD.

Objective 2

Dam Stability Evaluation

Perform a complete dam safety evaluation including:

• Static slope stability

• Seismic slope stability

• Permanent deformation analysis

• Pseudo-static analyses

• Newmark displacement analyses

• Internal erosion evaluation

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Seepage analysis

• Settlement evaluation

• Foundation bearing evaluation

• Reservoir loading scenarios

Objective 3

Comprehensive Deficiency Assessment

Prepare an integrated engineering assessment summarizing all known deficiencies including:

• Dam safety

• Spillway capacity

• Structural deficiencies

• Hydraulic deficiencies

• Operational deficiencies

• Maintenance deficiencies

• Climate resiliency

• Long-term regulatory compliance

The report shall prioritize deficiencies based upon public safety risk, regulatory compliance, operational reliability, constructability, and cost.

Objective 4

Long-Term Feasibility Alternatives Analysis

Following completion of the stability assessment, prepare a comprehensive alternatives analysis evaluating long-term improvements.

Alternatives shall include, at a minimum:

Alternative A

Increase spillway conveyance while maintaining existing reservoir operating elevations. Previous studies have outlined several spillway widening alternatives to maintain existing reservoir operating elevation at 315. Dam height 330, spill way at 315. The alternative will review and update the prior studies to meet current standards.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Alternative B

Assess and ensure dam integrity or dam reinforcement requirements when water level increased by approximately four feet. Raise reservoir operating level to 320.5 ft adding additional 4,000 AF storage. Reduce freeboard of dam from 15ft to 9.5 ft. Dam height = 330 (9.5 ft freeboard). Spillway at 320.

Assumption is to raise the operating level that will not impact Highway 128 and not require major structural/dam bolstering. If major dam work required would be a secondary alternative B.1 to identify the costs to increase to 4’.

B – What increases before triggering major structural/dam bolstering.

B.1 – What is required to increase 4’ for additional 4,000 AF storage.

Evaluate:

• Fusegates

• Labyrinth weir

• Gated spillway

• Reduced freeboard

• Filter berm

• Stability improvements

• Reservoir operations

• Environmental impacts

• Seismic impacts

Alternative C

Raise dam approximately seven feet. Raise reservoir operating level to 322.5 ft adding additional 8,000 AF storage. Dam height = 337. Spillway at 322.5.

Assumption is to raise the operating level that will not impact Highway 128.

Evaluate:

• Highway 128 impacts

• Fusegates

• Labyrinth weir

• Gated spillway

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Reduced freeboard

• Filter berm

• Stability Improvements

• Reservoir operations

• Environmental impacts

• Seismic impacts

Each alternative shall include:

• Planning level design

• Required investigations

• Environmental permitting

• Regulatory approvals

• Construction sequencing

• Schedule

• Construction cost estimate (Class 4 or better)

• Engineering cost estimate

• Life-cycle cost

• Annual maintenance costs

• Benefit-cost analysis

• Water supply yield

• Additional acre-feet created

• Cost per acre-foot

• Risk assessment

• Climate resilience

• Greenhouse gas considerations

• Operations impacts

• Dam safety impacts

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

2.3. 5. Scope of Services

The anticipated scope includes, but is not limited to:

A. Project Management

B. Agency Coordination

C. Existing Data Review

D. Survey

E. GIS Development

F. Geotechnical Investigation

G. Instrumentation Installation

H. Laboratory Testing

I. Geological Mapping

J. Hydraulic Modeling

K. Hydrologic Modeling

L. Spillway Design Concepts

M. Dam Stability Analysis

N. Structural Engineering

O. Environmental Constraints Analysis

P. Benefit-Cost Analysis

Q. WRDA Feasibility Support

R. CWIFP Coordination

S. Cost Estimating

T. Risk Assessment

U. Technical Memoranda

V. Public Meeting Support

W. City Council Support

X. DSOD Coordination

Y. USACE Coordination

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Z. Final Feasibility Report

2.4. 6. Minimum Consultant Qualifications

Each Proposal must be submitted in compliance with the requirements of this RFQ. Each Proposal must respond to the items listed below. Clarity and brevity are preferable to volume. Do not attach brochures or promotional materials to the Proposal. Statement of Qualifications should not exceed 35 one-sided pages.

However, resumes and required forms may be included in an appendix and not counted in the total page count.

SECTION 6 – MINIMUM CONSULTANT QUALIFICATIONS

The City intends to select a multidisciplinary consulting team with nationally recognized expertise in dam engineering, geotechnical engineering, hydraulic engineering, environmental permitting, and federal water resources planning. Firms shall demonstrate the following minimum qualifications. Failure to meet these requirements may result in the proposal being deemed non-responsive.

6.1 Prime Consultant

The Prime Consultant shall:

• Be legally authorized to perform engineering services in the State of California.

• Maintain an office capable of supporting the project throughout its duration.

• Have been in continuous business providing dam engineering services for a minimum of ten (10) years.

• Demonstrate successful completion of at least three (3) embankment dam projects exceeding 75 feet in height within the past fifteen (15) years.

• Demonstrate experience serving as either:

o Engineer of Record, o Owner's Engineer, o Design Engineer, or o Lead Geotechnical Consultant on comparable dam projects.

• Demonstrate experience working directly with California Division of Safety of Dams (DSOD) or another state dam safety regulatory agency.

6.2 Project Manager

The proposed Project Manager shall possess:

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• California Registered Civil Engineer.

• Minimum fifteen (15) years of professional experience.

• Minimum five (5) years managing dam safety projects.

• Demonstrated experience leading multidisciplinary engineering teams.

• Demonstrated experience presenting before governing boards and regulatory agencies.

• Experience managing projects exceeding $20 million in construction value.

6.3 Geotechnical Lead

The Geotechnical Lead shall possess:

• California Registered Geotechnical Engineer.

• Minimum fifteen (15) years of dam engineering experience.

• Experience performing:

o embankment investigations, o seismic evaluations, o stability analyses, o seepage analyses, o liquefaction analyses, o instrumentation programs.

6.4 Engineering Geologist

The Engineering Geologist shall:

• Be licensed in California.

• Have experience evaluating earthen dams.

• Have completed foundation investigations.

• Have experience preparing Geotechnical Data Reports for DSOD review.

6.5 Hydraulic Engineer

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

The Hydraulic Lead shall demonstrate experience with:

• PMF evaluations.

• Spillway hydraulics.

• HEC-RAS.

• HEC-HMS.

• CFD modeling.

• Energy dissipation.

• Spillway capacity analyses.

• Labyrinth weirs.

• Fusegates.

• Gated spillways.

6.6 Structural Engineer

The Structural Lead shall demonstrate experience with:

• Intake towers.

• Spillways.

• Reinforced concrete hydraulic structures.

• Seismic retrofit.

• Outlet works.

6.7 Environmental Lead

The Environmental Lead shall demonstrate experience with:

• CEQA.

• NEPA.

• Section 404 permitting.

• Section 401 certification.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• ESA consultation.

• Cultural resources.

• Biological resources.

• Water quality permitting.

6.8 Federal Funding Experience

The consulting team shall demonstrate experience with one or more of the following:

• USACE General Investigation Studies.

• WRDA projects.

• FEMA dam rehabilitation.

• Bureau of Reclamation projects.

• CWIFP or WIFIA financing.

• State Revolving Fund financing.

2.5. 7. DESIRED TEAM DISCIPLINES

The City anticipates the successful Consultant team will include expertise in:

• Dam Engineering

• Civil Engineering

• Structural Engineering

• Geotechnical Engineering

• Engineering Geology

• Hydrology

• Hydraulics

• Surveying

• GIS

• Environmental Planning

• Biology

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Cultural Resources

• Geophysics

• Cost Estimating

• Construction Management

• Risk Assessment

• Economic Analysis

• Benefit-Cost Analysis

• Public Outreach

• Grant Administration

2.6. 8. Evaluation Criteria

Phase 1 - Evaluation of the Statement of Qualifications

The City will have a two step process evaluation with statement of qualifications that will be weighted for 70 percent of the selection process. Upon ranking of the statement of qualifications and up to the discretion of the City the top three consultants will be invited for interviews that will be weighted for 30 percent of the selection process.

1 - Firm Experience and Relevant Project History

The City intends to select the consultant providing the highest demonstrated qualifications and best overall value based solely on qualifications, technical capability, experience, and demonstrated ability to successfully perform the required services. Consistent with Qualifications-Based Selection requirements, cost and fee information shall not be considered during ranking of firms. Price proposals shall not be submitted with the

Statement of Qualifications.

Evaluate the firm's demonstrated experience with:

• Large embankment dams.

• High-hazard dams.

• Spillway rehabilitation.

• Dam safety evaluations.

• Reservoir enlargement studies.

• Seismic stability assessments.

• Hydrologic and hydraulic evaluations.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Projects with construction costs exceeding $50 million.

Scoring (15 Points Maximum):

Score Description

13–15 Extensive experience on multiple comparable dam projects with direct relevance to

Conn Dam

10–12 Strong dam experience with some comparable projects

7–9 General dam or water infrastructure experience

1–6 Limited directly relevant experience

2. Project Manager and Key Personnel Qualifications

Evaluate:

Project Manager

• Years of experience.

• Dam project management experience.

• DSOD experience.

• USACE experience.

• Availability.

Key Staff

Including:

• Dam Safety Lead

• Geotechnical Engineer

• Engineering Geologist

• Hydraulic Engineer

• Structural Engineer

• Environmental Lead

• Cost Estimator

• Risk Management Lead

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Scoring (15 Points Maximum):

Score Description

13–15 Nationally recognized experts with extensive directly relevant experience

10–12 Highly qualified team with strong comparable experience

7–9 Qualified team with moderate relevant experience

1–6 Limited experience

3. Dam Safety, Geotechnical, and Regulatory Experience

Evaluate demonstrated experience with:

• California Division of Safety of Dams (DSOD).

• Embankment dam investigations.

• Stability analyses.

• Seismic evaluations.

• Piezometer programs.

• Foundation investigations.

• Spillway evaluations.

• Dam alteration applications.

• Regulatory approvals.

Scoring (15 Points Maximum):

Score Description

13–15 Extensive DSOD and major dam safety experience

10–12 Strong dam safety experience

7–9 Some dam-related experience

1–6 Limited

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

4. Technical Understanding and Project Approach

• Understanding of Conn Dam history.

• Understanding of DSOD concerns.

• Investigation approach.

• Alternatives evaluation methodology.

• Integration of dam safety and water supply objectives.

• Constructability considerations.

• Permitting strategy.

• Schedule approach.

SOQs should demonstrate understanding of:

• December 31, 2028 DSOD geotechnical report deadline.

• WRDA feasibility requirements.

• CWIFP funding objectives.

• Reservoir enlargement opportunities.

Scoring (15 points maximum):

Score Description

13–15 Exceptional understanding and innovative approach

10–12 Strong approach

7–9 Adequate approach

1–6 Generic response

5. Federal Funding and Agency Coordination Experience

Evaluate experience with:

• USACE General Investigations.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• WRDA projects.

• Federal benefit-cost analyses.

• CWIFP/WIFIA.

• Federal environmental processes.

Scoring (5 points maximum)

Score Description

5 Extensive federal experience

3–4 Some federal experience

1–2 Limited experience

6. Quality Management and Risk Management Approach

• QA/QC program.

• Independent technical reviews.

• Risk register approach.

• Project controls.

• Document management.

Scoring (5 points maximum):

Score Description

5 Excellent quality and risk management approach

3–4 Adequate approach

1-2 Limited approach

Phase 2 - Oral Interviews

Selected consultants will be provided a 45 minute in person interview. It is expected for an up to 20-minute presentation with 25 minutes of questions and answers.

7. Project Understanding

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Understanding of dam history.

• Understanding of DSOD concerns.

• Understanding of federal funding pathway.

• Understanding of project risks.

Scoring (8 points maximum)

Interview questions may include:

"What do you believe are the three greatest technical risks associated with Conn Dam, and how would your team address them?"

8 . Technical Approach

Evaluate:

• Investigation sequencing.

• Stability analysis approach.

• Alternatives evaluation.

• Spillway improvement approach.

• Reservoir enlargement evaluation.

Interview question may include:

Scoring (8 points maximum)

"Describe your approach to determining whether raising Conn Dam is technically feasible and economically justified."

9. Team Qualifications and Availability

Evaluate:

• Presence of proposed staff.

• Team interaction.

• Availability.

• Commitment

Scoring (5 points maximum)

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Interview question may include:

"Identify the staff member most critical to project success and explain why."

10. Communication and Collaboration

Evaluate:

• Ability to communicate technical issues.

• Agency coordination approach.

• Public communication.

Scoring (4 points maximum)

11. Risk Identification and Problem Solving

Evaluate:

• Ability to anticipate issues.

• Practical solutions.

• Risk mitigation.

Scoring (4 points maximum)

Final Ranking

Component Points

Written SOQ 70

Oral Interview 30

Total Available Points 100

The City will rank firms based on total combined score.

The highest-ranked firm will be invited to negotiate scope and fee. If negotiations are unsuccessful, the City may terminate negotiations and proceed with the next-ranked firm consistent with applicable procurement requirements.

The City anticipates inviting the three highest-ranked firms for oral interviews.

Interview presentations shall be limited to forty-five (45) minutes followed by thirty (25) minutes of questions.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

The proposed Project Manager and all Key Personnel shall attend the interview.

2.7. 9. Protest Procedure Review

Any protest challenging the City’s intended selection or the selection process must be submitted no later than

5:00 p.m., on the fifth business day following the date of the Notice of Intended Selection. The protest must be submitted in writing via email to Adam Nelkie, Deputy Utilities Director, at anelkie@cityofnapa.org, and must clearly specify the basis for the protest. The protest will be reviewed by the City’s Decision-Maker, along with the recommendation from the Project Manager and legal advice from the City Attorney’s Office. The determination of the City’s Decision-Maker on the protest is final. No public hearing will be held on the protest. Time being of the essence, the City reserves the right to proceed with award of the Agreement and commencement of the Services notwithstanding any pending protest or legal challenge.

2.8. 10. Statement of Qualifications Submittal Requirements

Statement of Qualifications Page Limit

The Statement of Qualifications (SOQ) shall be limited to thirty-five (35) single-sided pages maximum. The page limit is intended to ensure that SOQs are concise, focused, and directly responsive to the requirements of this RFQ. Statements shall be digitally submitted.

The 35-page limit shall include all pages submitted as part of the SOQ, including, but not limited to:

• Cover pages;

• Table of contents;

• Introduction and/or cover letter;

• Section divider pages;

• Tabs or blank pages;

• Firm qualifications and experience;

• Project descriptions;

• Approach and methodology;

• Project team information; and

• Any other material included within the main body of the SOQ.

The following items shall not count toward the 35-page limit, provided they are submitted as separate appendices as specified in this RFQ:

A. Resumes of proposed key personnel; and

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

B. Requested Changes to the Professional Services Agreement, including any exceptions, proposed modifications, or requested revisions to the City's form of agreement.

The appendices identified above shall be clearly separated from the main body of the SOQ and shall not be used to provide additional information that is otherwise required to be included within the 35-page SOQ limit.

Pages submitted in excess of the 35-page limit will not be considered in the evaluation. The City reserves the right to determine which pages will be considered when an SOQ exceeds the stated page limit. Firms are encouraged to use the available pages efficiently and provide only information that is relevant and responsive to the requirements of this RFQ.

For purposes of the page limit, each single-sided sheet of paper constitutes one page, regardless of the amount of content appearing on the page. Fold-out pages, double-sided pages, reduced-size pages, or other formatting techniques shall not be used to circumvent the page limitation.

The statements shall include:

1. Cover Letter

Provide a brief cover letter that includes all of the following information:

1. Respondent’s name, address, phone number, and website address;

2. Type of organization (e.g. corporation, partnership, etc.);

3. A summary of general information about Respondent and the types of services it provides in relation to the Services required by the City; and

4. Contact information, including name, title, address, phone number, and email, of Respondent’s primary representative for purposes of this RFQ.

The cover letter must be signed by a representative that is authorized to bind Respondent by contract and must state his or her name, title, and email address.

2. General Qualifications

Provide a brief description of the Respondent’s business, including the number of years in business under the current name. Describe the size of the business, including total number of employees and offices, and identify and briefly describe each local office that will be involved in providing the Services if awarded the Agreement.

Describe how and why Respondent is qualified to provide the Services.

Include Organization Chart of Prime and Subcontractors

Cover Sections:

6.1 & 6.8 Minimum Consultant Qualifications

7 – Desired Team Disciplines

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

3. Experience

Identify services Respondent has provided in the last five years that are similar in scope and nature to the

Services required by this RFQ, particularly with respect to services provided to other cities or public agencies.

For each example, provide:

1. A brief description of the services provided

2. An explanation of why this experience is relevant to the required Services, and

3. The name and address of the contracting agency, including contact information for a reference check (name, title, phone number, and email address)

Cover Sections:

Section 8

1. Firm Experience and Relevant Project History

3. Dam Safety, Geotechnical, and Regulatory Experience

5. Federal Funding and Agency Coordination Experience

4. Proposed Scope of Services

Based upon the Draft Scope of Services, provide a complete description of the scope of services (“Proposed

Scope of Services”) the Respondent proposes to perform to achieve the City’s objectives identified in the Draft

Scope of Services. The Proposed Scope of Services may identify services which differ from the services in the

Draft Scope of Services if the Respondent believes the changes will assist the City in more efficiently and effectively achieving the City’s objectives. Briefly describe Respondent’s proposed approach to providing the

Services and how that approach will offer value to the City. Identify any proposed innovations that may be used to achieve more cost-effective delivery of the Services. Provide a work plan and proposed schedule for the tasks described in the Draft Scope of Services.

Cover Sections:

Section 8

4. Technical Understanding and Project Approach

6. Quality Management and Risk Management Approach

5. Staffing

Identify by name and title Respondent’s key personnel that will be assigned to provide the Services and for each, include a resume with his or her education, training, and experience. Identify by name, address, and website, each subconsultant or subcontractor, if any, that will be involved with providing the Services, including the proposed role for each such subconsultant or subcontractor. Include all applicable license

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study numbers for any license required to perform the Services. Resumes shall be attached in appendix and does not count toward the maximum page requirements.

Cover Sections:

6.2 thru 6.7 - Section 6 Minimum Consultant Qualifications

Section 8

2. Project Manager and Key Personnel Qualifications

6. Exceptions to Agreement

Identify any objections to and/or requested changes to the Agreement, Attach as an appendix a marked up copy of agreement and does not count toward the maximum page requirements.

2.9. FEDERAL COMPLIANCE REQUIREMENTS

FEDERAL COMPLIANCE REQUIREMENTS Conn Dam Stability Assessment, Spillway Improvements and

Feasibility Alternatives Study

The project funding including design is anticipated to be Federally funded. Selected consultant will be required to meet all the Federal requirements. Consultant and subconsultant if applicable shall review and each sign and submit as part of Statement of Qualifications as an appendix, Exhibit B Federal Compliance Certifications.

Certification does not count toward maximum RFQ page limits.

TABLE OF CONTENTS

A. Purpose

B. Federal Funding Overview

C. Applicable Federal Authorities

D. Required Consultant Certifications

E. Procurement Certifications

F. Required Federal Contract Clauses

G. Civil Rights Requirements

H. Federal Labor Requirements

I. Debarment and Suspension

J. Lobbying Restrictions

K. Domestic Preference Requirements

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

L. Telecommunications Restrictions

M. Records Retention

N. Audit Requirements

O. Conflict of Interest

P. Subconsultant Requirements

Q. Cybersecurity Requirements

R. Federal Reporting Requirements

S. Required Forms

T. Required Federal Websites

SECTION A Purpose

The City anticipates that portions of this Project may receive financial assistance from one or more Federal funding sources.

Accordingly, all consultants shall comply with all applicable Federal statutes, regulations, Executive Orders, funding conditions, and grant requirements throughout the duration of the Agreement.

The Consultant acknowledges that additional federal requirements may become applicable as funding sources are identified.

SECTION B Anticipated Funding Sources

Funding may include:

• U.S. Army Corps of Engineers (USACE)

• Water Resources Development Act (WRDA)

• Corps Water Infrastructure Financing Program (CWIFP)

• Federal Emergency Management Agency (FEMA)

• Bureau of Reclamation

• EPA State Revolving Fund

• Other Federal Infrastructure Programs

SECTION C Applicable Regulations

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Consultant shall comply with all applicable Federal requirements including but not limited to:

Uniform Guidance -2 CFR Part 200

Required Contract Clauses -Appendix II to 2 CFR Part 200

Brooks Act - Qualifications-Based Selection

National Environmental Policy Act (NEPA)

Clean Water Act

Clean Air Act

Endangered Species Act

National Historic Preservation Act

Americans with Disabilities Act

Civil Rights Act

Executive Order 11246

Byrd Anti-Lobbying Amendment

Debarment and Suspension

Build America, Buy America Act (when applicable)

SECTION D Consultant Certifications

The Consultant shall submit the following certifications with its Statement of Qualifications, see Exhibit C for forms.

A. Debarment Certification

B. Lobbying Certification

C. Conflict of Interest

D. Organizational Conflict of Interest

E. Non-Collusion Affidavit

F. Equal Employment Opportunity

G. Title VI Assurance

H. ADA Certification

I. Key Personnel Availability

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

J. Iran Contracting Act

K. Federal Compliance Certification

SECTION E System for Award Management (SAM)

The Consultant shall:

• Maintain an active registration in the System for Award Management (SAM) throughout the life of the

Agreement.

• Notify the City immediately if registration lapses.

• Verify all subcontractors are registered before award.

SECTION F Debarment

The Consultant certifies:

Neither the Consultant nor any principal is presently debarred, suspended, proposed for debarment, declared ineligible, or voluntarily excluded from participation in federally funded contracts.

The City reserves the right to verify eligibility at any time.

SECTION G Lobbying

The Consultant certifies:

• No Federal appropriated funds have been paid to influence any Federal agency or Member of

Congress.

• If non-Federal funds are used for lobbying, Standard Form LLL shall be submitted.

SECTION H Conflict of Interest

The Consultant shall disclose:

Current work for:

• DSOD

• USACE

• Napa County

• Adjacent landowners

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

• Regulatory agencies

• Utility owners

• Any entity that could create an organizational conflict of interest.

SECTION I Equal Employment Opportunity

Consultant shall comply with:

• Executive Order 11246

• 41 CFR Chapter 60

• Title VII

• ADA

• Rehabilitation Act

• Age Discrimination Act

• Equal Pay Act

SECTION J Title VI

Consultant shall not discriminate based upon:

• Race

• Color

• National Origin

• Sex

• Age

• Disability

• Religion

• Veteran Status

• Any protected class under Federal or California law.

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

SECTION K Domestic Preferences

To the extent applicable, Consultant shall comply with:

• Build America Buy America Act

• Infrastructure Investment and Jobs Act

• Federal domestic preference requirements.

SECTION 12 Telecommunications

Consultant certifies compliance with 2 CFR §200.216.

No prohibited telecommunications equipment shall be purchased or utilized in performance of this

Agreement.

SECTION 13 Records Retention

Consultant shall retain:

• Engineering calculations

• Laboratory reports

• Inspection records

• Invoices

• Payroll

• Subcontracts

• Field notes

• Meeting minutes

• Electronic files

• CAD models

• GIS files

• Hydraulic models

• Geotechnical models

• Financial records

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study for a minimum of five (5) years after final closeout, or longer if required by the applicable funding agreement or if any audit, litigation, or claim remains unresolved.

SECTION 14 Federal Audit

The Consultant shall provide:

Full access to records by:

• City of Napa

• State of California

• Inspector General

• Government Accountability Office

• USACE

• Federal Awarding Agency

• Comptroller General

SECTION 15 Subconsultants

All Federal requirements shall flow down to every subcontract.

Consultant shall monitor compliance.

SECTION 16 Cybersecurity

Consultant shall maintain:

• Multi-factor authentication

• Encrypted file transfer

• Backups

• Incident response plan

• Secure cloud storage

• Protection of critical infrastructure information

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

SECTION 17 Required Deliverables

Consultant shall provide where applicable:

• Editable Word

• Excel

• Civil 3D

• AutoCAD

• GIS Geodatabase

• HEC-RAS

• HEC-HMS

• Slope/W

• GeoStudio

• PLAXIS

• BIM (if applicable)

• Native modeling files

• PDF

SECTION 18 Required Forms

See Exhibit B for Required forms to submit.

SECTION 19 Federal Reporting

Consultant shall support preparation of:

Federal progress reports

Benefit-Cost Analysis

Financial reporting

Environmental documentation

Grant reporting

USACE documentation

CWIFP reporting

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

Federal reimbursement requests

SECTION 20 Required Federal Websites

The Consultant shall be familiar with and comply with guidance published by:

• System for Award Management (SAM)

• U.S. Army Corps of Engineers

• Office of Management and Budget

• Grants.gov

• FEMA

• Federal Acquisition Regulation resources (as applicable to referenced standards)

• California Division of Safety of Dams

2.10. Questions

Questions shall be submitted in writing to Adam Nelkie, at anelkie@cityofnapa.org no later than October 20, 2026. Responses to all questions received will be issued via addendum posted to open Gov by October 26th.

There will be no City facilitated tours as Hennessey Reservoir is open to the public but access to the dam and spillway are not open to the public but visible from view points along highway 128, Sage Canyon Road.

mailto:anelkie@cityofnapa.org

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

3. REQUEST FOR QUALIFICATIONS PROCEDURES

3.1. Submittal Instructions

Statement of Qualifications must be received by the City by or before Thursday, October 29, 2026 at 4:00 pm

(“Proposal Deadline”). Respondent must submit a statement of qualifications through Opengov, the City's

Procurement Portal ("Procurement Portal") at https://procurement.opengov.com/portal/cityofnapa, no later than the Statement of Qualification Submission Deadline.

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

Title: Request for Qualifications - Conn Dam Stability Assessment, Spillway Improvements, and Feasibility Alternatives Study

4. Vendor Questionnaire

1. Request for Qualifications - Conn Dam Stability Assessment, Spillway

Improvements, and Feasibility Alternatives Study

See RFQ for submission details.