C--D-B North Fume Replacement, Sacramento National Wildlife Refuge

Amendment / Modification

This amendment (0002) to Solicitation 140FGA26R0001 makes the following changes:

• Answers to Questions: All vendor questions received in response to the solicitation have been answered. Refer to the attached Q&A document, which is incorporated into this solicitation.

• Statement of Work (SOW) Update: The SOW has been updated to reflect a revised period of performance. The revised SOW is attached.

• Proposal Due Date Extension: The due date for Phase 1 proposals has been extended to March 20, 2026, by 10:00 AM PT.

• Item 00010 (Site Investigation, A-E Scoping, etc.): The description for this item has been updated. The period of performance is now 04/20/2026 to 04/30/2027.

• Item 00020 (Construct North Flume Replacement): The description for this item has been updated to "Construct North Flume Replacement in accordance with SOW."

• Solicitation

• Statement of Work (SOW)

• Item 00010

• Item 00020

• Proposal due date

• The proposal deadline for Phase 1 has been extended to March 20, 2026.

• Bidders must review the updated SOW and the attached Q&A for revised requirements and information.

Questions & Answers / Clarifications

This document contains Amendment #2 to the Design-Build Services North Flume Replacement solicitation, providing responses to vendor questions regarding project requirements, environmental considerations, permitting, and contract terms.

• Project Experience: No standardized form is required for the Past Project Experience submission; vendors may use their own template, ensuring all typical PPQ information is included.
• Phase 1 Submission: Only Phase 1 information/documentation should be submitted initially. Phase 2 elements (key personnel, price, bid guarantee) are only required from firms selected to proceed.
• Period of Performance: The overall period is 24 months, with 35% Design and permitting within 12 months of NTP, and Construction/build within 12 months thereafter. Delays from regulatory agency reviews may be considered for performance adjustment.
• Permitting Responsibility: The contractor is responsible for determining and acquiring all necessary permits (e.g., USACE Section 404, RWQCB Section 401, CDFW Streambed Alteration Agreement) and must provide proof of attempt to contact regulatory agencies.
• Environmental Surveys: While USFWS will conduct preconstruction surveys for Giant Garter Snake, biological monitoring during ground-disturbing activities is not required by this contract. Cultural resource review is assumed complete, and no nesting bird surveys are required for this location.
• Site Data: No geotechnical or subsurface investigation data is available. As-built dimensions or additional drawings for the existing flume are also not available beyond what was attached to the solicitation.
• Construction Timing: Excavation and all ground-breaking activities are restricted to May 1 to October 31. Canal dewatering will occur during the summer construction period, from May 1 until approximately September.
• Flow Requirements: The flume pipe requires a minimum conveyance of 30 cfs. The structure must be designed for a minimal service life of 50 years.
• Cost Estimates: The solicitation magnitude of $500,000 - $1,000,000 is for the entire design-build project, not just construction. USFWS will not provide separate estimated costs for A&E or permitting efforts.

This amendment clarifies several aspects of the solicitation, including submission requirements, performance periods, contractor responsibilities for permitting and site investigations, and environmental considerations. Bidders should review these clarifications carefully when preparing their proposals. The document also confirms that FAR 52.236-2 will apply for differing site conditions.

Statement of Work (SOW)

To procure design-build services for the replacement of the North Flume at the Sacramento National Wildlife Refuge in Willows, California.

• Prepare construction documents, obtain permits, and perform construction for the North Flume replacement.
• Includes design and installation of a replacement flume with adequate conveyance capacity, fire-resistant and corrosion-resistant materials.
• Design and install two OSHA compliant, slip-resistant, and corrosion-resistant walkway surfaces with removable handrails.
• Design and install stoplog slots and provide replacement wood stoplogs.
• Demolition, removal, recycling, and disposal of the existing flume infrastructure.
• Install erosion and sediment control measures, vegetation, and stabilization of disturbed areas.
• The structure must have a minimum service life of 50 years and resist variable flows and deterioration.

Overall period of 24 months: 12 months for design and permitting (Task 1-3), and 12 months for construction/build (Task 6).

• All excavation activities must occur between May 1 and October 31.
• Strict measures to avoid adverse effects on Giant Garter Snakes (GGS) and their habitat, including preconstruction surveys, marking of sensitive areas, and specific protocols for handling GGS encounters.
• Construction vehicles must adhere to a speed limit of 15 mph.
• Fueling and maintenance of equipment must occur in designated areas with spill response supplies.
• Contractor must furnish all temporary facilities and utilities.
• Work must comply with applicable federal, state, and local codes, including IBC, NEC, NFPA 101, ADA/ABA, and industry standards.

Sacramento National Wildlife Refuge, Willows, CA.

• Technical Coordinator (COR): Armando Porras
• Field Station: Sharon Vaughn (Project Leader), Brendan Leigh (Refuge Manager)

Form / Attachment / Pricing Sheet

This document is a Past Performance Questionnaire (PPQ) from the Department of the Interior, U.S. Fish and Wildlife Service (USFWS). It is used to gather feedback on a company's past performance for a contract the USFWS is considering.

• Firm Information: Fields for Project Title, Location, Description, Company Name, Contract Number, Start/Completion Dates, Initial/Final Amounts, and Evaluator details.
• Ratings Overview: A scale from 'O' (Outstanding) to 'U' (Unacceptable) with descriptions for each rating level.
• Questionnaire: Specific questions regarding the contractor's relationship with the client, corporate conduct, quality control, performance schedule adherence, issuance of cure notices, willingness to re-award, customer satisfaction, and opportunity to discuss negative feedback.
• Comments Section: Space for detailed remarks and an overall rating.
• Signatures: Fields for the evaluator's name and date.

This questionnaire is a tool for the government to assess a bidder's past performance. Bidders should be aware that their past performance will be evaluated using this form. Understanding the questions and rating criteria can help bidders prepare for providing their own past performance information or anticipate the type of feedback government evaluators may seek.

Amendment / Modification

This amendment (0001) to solicitation 140FGA26R0001, originally dated 02/03/2026, makes the following changes:

• Answers Questions: Provides answers to vendor questions received to date, referencing an attached Q&A document (not provided in this extract).
• Incorporates Clause: Adds DOI clause 1428.301, "Liability Insurance - Department of the Interior (JUL 1996)". This clause requires the contractor to maintain liability insurance with specific minimum coverage amounts ($500,000 per person, $500,000 per occurrence, $500,000 property damage) and mandates notification to the Contracting Officer prior to cancellation or modification of the policy.
• Submission Deadline: Clarifies that all questions regarding the solicitation must be submitted via email to CS Shanen Fox at shanen.fox@fws.gov by the RFI/question deadline outlined in section L.1.3. Late questions will not be answered.
• Period of Performance: Updates the Period of Performance to 04/20/2026 to 10/20/2027.
• Item 00010: Modifies Item 00010 to include Site Investigation, A-E Scoping, Data Collection, Field Report Technical Memorandum, Design Development (35% and 65%), Environmental Permitting Assistance and Submittal, and 100% Construction Documents.
• Item 00020: Modifies Item 00020 to "Construct North Flume Replacement in accordance with SOW."

• Solicitation Q&A

• Contract Clauses (addition of 1428.301)

• Submission deadlines for questions

• Period of Performance

• Line Item Descriptions for 00010 and 00020

• The amendment extends the period of performance. Bidders should review the incorporated clause and updated line item descriptions. The deadline for submitting questions is reiterated.

Questions & Answers / Clarifications

This document provides responses to vendor questions regarding Solicitation NO. 140FGA26R0001, Amendment #1.

• Insurance Requirements: The solicitation now incorporates clause 1428.301 Liability Insurance - Department of the Interior (JUL 1996). Minimum insurance limits are $500,000 per person, $500,000 per occurrence, and $500,000 for property damage. Policies must include an endorsement notifying the Contracting Officer 30 days prior to cancellation or modification. Certificates of insurance are required before beginning work.
• Past Performance Evaluation: Offerors must submit CPARS evaluations for completed projects or a Past Performance Questionnaire (PPQ) completed by a client with up-to-date contact information. No standard PPQ form is provided, but it must be completed by the offeror's client. This is in addition to the submission requirements in section L.2.1.2 for Evaluation Factor 1, Recent Relevant Experience.
• Project Start Date: The aimed period of performance start date is April 20, 2026. However, for this design-build project, the construction phase start date is dependent on the 100% design approval. The overall period of performance is 18 months, with the design and permitting phase to be completed within six (6) months from the Notice to Proceed (NTP), and the construction phase within twelve (12) months after design acceptance.

This amendment clarifies insurance requirements, past performance submission details, and provides further context on the project timeline, which may affect proposal preparation and submission strategies.

Solicitation / RFP / RFQ

This solicitation is for a Design-Build (D-B) Construction contract for the North Flume Replacement project located in Willows, CA. The magnitude of the project is estimated to be between $500,000 and $1,000,000. The contract type will be Firm Fixed-Price.

The scope of work includes:

• Site Investigation, A-E Scoping, Data Collection, Field Report, Technical Memorandum, and Design Development.

• 35% Design Development.

• Environmental Permitting Assistance and Submittal.

• 65% Construction Documents.

• 100% Construction Documents.

• Construction of the North Flume Replacement.

• Contract Type: Firm Fixed-Price Construction.

• Period of Performance: 540 calendar days from notice to proceed.

• Estimated Project Magnitude: $500,000 - $1,000,000.

• This is a two-phase Design-Build Selection Process.

• Phase 1: Non-cost proposals will be evaluated based on Recent Relevant Experience and Technical Approach. A maximum of 3 offerors will be selected for Phase 2.

• Phase 2: Selected offerors will submit proposals including Key Personnel, Price, Representations, Certifications, and a Bid Guarantee.

• Award will be made on a best-value, tradeoff basis.

• Proposal Submission Deadline: March 13, 2026, 10:00 AM PST.

• Questions Deadline: March 5, 2026, 10:00 AM PST.

• This Request for Proposal (RFP) is set aside for small business concerns.

• NAICS Code: 237990

• Small Business Size Standard: $45.0M

• A site visit is scheduled for March 3, 2026, at 10:00 AM PST. RSVP required.

• Proposals must be submitted electronically via email.

Form / Attachment / Pricing Sheet

This document is a Technical Report detailing a Master Plan for the Canal 26.2 Restoration at the Sacramento National Wildlife Refuge (NWR). It provides an evaluation of the existing canal and levee road system and prioritizes improvements for both the canal and water control structures (WCSs).

• Hydraulic Analysis: Evaluates the existing conditions and proposes alternatives to increase flow capacity to 90 cfs while maintaining a 1-foot freeboard.
• Alternatives Considered:
  • Alternative 1: Canal Vegetation Removal and WCS Cleaning.
  • Alternative 2: Canal Vegetation Removal and Replacement of 3 Siphons.
  • Alternative 3: Canal Vegetation Removal and Replacement of 5 Siphons.
• Access Road Evaluation: Assesses the condition of the gravel access road and recommends spot repairs, resurfacing, or reconstruction for year-round access.
• North Flume Analysis: Evaluates the structural deficiencies and repair needs of the North Flume.
• Feasibility Study: Compares alternatives based on physical conditions, protected habitat, lifecycle, risk reduction, and cost.
• Conclusions & Recommendations: Recommends Alternative 3 (replacing 5 siphons, removing vegetation and specific culvert crossings) as the optimum solution, along with spot repairs for the access road. It also recommends repair and reconstruction of the North Flume.

This report outlines the scope of work, technical requirements, and recommended solutions for the Canal 26.2 restoration. It provides critical information for potential bidders regarding the project's objectives, the specific improvements needed (e.g., siphon replacement, vegetation removal, road repairs), and the evaluation criteria used for selecting alternatives. The detailed analysis of hydraulic performance and feasibility studies will inform bidders about the technical challenges and expected outcomes of the project.

Form / Attachment / Pricing Sheet

This document is a technical drawing (Exhibit 2) detailing the design for a flume across the North Fork of Logan Creek. It provides specific dimensions, elevations, and construction details for the flume structure.

• Elevations: Includes upstream, downstream, and normal ground line elevations.
• Dimensions: Provides measurements for flume width, length, depth, and component sizes (e.g., riprap, stringers, anchor bolts).
• Sections: Illustrates cross-sections (A-A, B-B, C-C) and details of specific components like the flume end groove and lag screw connections.
• Materials: Mentions materials such as riprap, gravel cushion, planks, and galvanized bolts.
• Notes: Includes important disclaimers such as "THIS DRAWING MAY OR MAY NOT BE CURRENT AND IS FOR REFERENCE ONLY" and "CONTRACTOR MUST FIELD VERIFY EXISTING CONDITIONS PRIOR TO DESIGN, SHOP FABRICATION, ON-SITE WORK, CONSTRUCTION, AND INSTALLATION."

This drawing is critical for bidders to understand the physical scope and technical specifications of the flume structure. It informs design considerations, material requirements, and construction methods necessary for accurate bidding and project execution. Bidders must pay close attention to the "for reference only" and "field verify" notes.

Forms / Attachments / Pricing Sheets

This document provides the prevailing wage rates for various construction trades in California, as determined by the U.S. Department of Labor. It is intended to ensure fair wages are paid on federal and federally funded construction projects.

• General Decision Numbers: Identifies specific wage determinations (e.g., CA20260007).
• Construction Types: Specifies the types of construction covered (Building, Heavy, Highway).
• Counties: Lists the specific California counties to which the wage rates apply.
• Trades and Classifications: Details various construction trades (e.g., Asbestos Workers, Boilermakers, Bricklayers, Carpenters, Electricians, Laborers, Plumbers, Sheet Metal Workers, etc.) and their respective wage rates and fringe benefits.
• Modification Numbers and Dates: Indicates revisions to the wage determinations.
• Area Descriptions: Defines specific geographic areas within counties or regions for which different wage rates may apply.
• Footnotes and Premiums: Provides additional information on special pay rates, holiday pay, and working conditions.

Bidders must use these prevailing wage rates to accurately estimate labor costs for their proposals on relevant federal or federally funded construction projects. Failure to comply with these wage requirements can lead to penalties and debarment. Understanding these rates is crucial for developing a compliant and competitive bid.

Statement of Work (SOW) / Performance Work Statement (PWS)

This Statement of Work (SOW) details the requirements for design-build services to prepare construction documents, provide permitting, and construct the replacement of the North Flume at the Sacramento National Wildlife Refuge (NWR) in Willows, California.

• Design and install a fire-resistant, corrugated metal pipe (CMP) replacement flume with conveyance capacity meeting or exceeding the existing flume.

• Design and install two OSHA compliant, slip-resistant, and corrosion-resistant walkway surfaces with removable handrails for access over the spillway connection.

• Design and install stoplog slots and provide replacement wood stoplogs.

• Demolish, remove, recycle, and/or dispose of the existing flume infrastructure.

• Install erosion and sediment control measures, vegetation, and stabilization of disturbed areas.

• The structure must be designed for a minimum service life of 50 years, resist variable flows, prevent deterioration, and decrease maintenance.

• The project includes a 100% contractor turnkey installation, fully functional, and operational flume.

• Overall period of performance: 18 months.

• Design and permitting phase: within 6 months from Notice to Proceed (NTP).

• Construction/build phase: within 12 months from completion and acceptance of the design phase.

• All excavation activities must occur between May 1 and October 31.

• Project location: Sacramento National Wildlife Refuge, Willows, CA.

• Environmental Considerations: Measures to avoid adverse effects on giant garter snakes (GGS) and their habitat are detailed, including preconstruction surveys, timing of excavation (May 1 - Oct 31), habitat dewatering periods, and protocols for encountering GGS.

• Construction Vehicles: Speed limit of 15 mph on site; fueling and maintenance in designated areas with spill response supplies.

• Personnel: Must stop work and contact COR and refuge biologist if any snakes are encountered.

• Professional Engineer: Contractor's Architect-Engineer (A-E) must be a licensed Professional Engineer in California.

• Permitting: Contractor is responsible for obtaining all necessary permits.

• Working Hours: Monday-Friday, 7:00 AM to 4:30 PM, excluding Federal Holidays, unless otherwise approved.

• Government Furnished Information: USFWS will provide available drawings, reports, and other documents related to the North Flume.

• Contractor Furnished: Contractor must furnish all temporary facilities and utilities.

• Inspection and Acceptance: Work must comply with applicable federal, state, and local codes and industry standards.

Form / Attachment / Pricing Sheet

This document is a "Sources Sought" form used to gather information from interested and capable firms regarding their qualifications and interest in a potential future project. It is used to determine market capabilities and potential small business set-aside options.

• Firm Information: Requires Name, Point of Contact, Address, Phone Number, Email Address, and UEI Number.
• Size Status/SBA Certifications: Checkboxes for Small Business, Women Owned Small Business (WOSB), Economically Disadvantaged Women Owned Small Business (EDWOSB), HUBZone, Service Disabled Veteran Owned Small Business (SDVOSB), ISBEE, and Other (specify).
• Capability Statement: A section to provide a brief summary of capabilities or attach a capabilities page.

Interested firms must complete this form and submit it via email by January 14, 2026, at 11:00 AM Pacific Time. The submission should include the reference number (140FGA26R0001) in the subject line. No additional specifications or information are available, and no questions will be answered during this sources sought period. The form should be emailed to shanen_fox@fws.gov.

Solicitation / RFP / RFQ

This is a pre-solicitation notice for a Request for Proposal (RFP) from the U.S. Fish & Wildlife Service (USFWS) for Design-Build Services for the North Flume Replacement. The project involves preparing construction documents, obtaining permits, and performing construction for the replacement of the North Flume at the Sacramento National Wildlife Refuge (NWR) in Willows, California.

• Design-build services for the North Flume Replacement.

• Preparation of construction documents.

• Permitting.

• Construction of the North Flume replacement.

• The magnitude of construction is estimated between $500,000 and $1,000,000.

• A Firm Fixed Price award is contemplated.

• The procurement will follow FAR 36.3 - Two-Phase Design-Build Selection Procedures.

• Award will be made on a best-value, tradeoff basis, allowing tradeoffs among cost/price and non-cost factors.

• The solicitation will be posted to SAM.gov | Contract Opportunities around January 5, 2026.

• Evaluation of interested firms will be based on:

  • Recent Relevant Experience (Phase 1)
  • Technical Approach (Phase 1)
  • Key Personnel (Phase 2)
  • Price (Phase 2)

• The solicitation package will include Solicitation Forms (SF1449), Statement of Work, and other required attachments.

• This procurement is being solicited as a total small business set aside.

• The NAICS code is 237990, with a size standard of $45.0M.

• Contractors must be registered in the System for Award Management (SAM) to participate.

• Inquiries and questions must be submitted in writing via email to shanen_fox@fws.gov.

• The Contracting Officer is Shanen Fox.