Z--Conlon Creek Culvert Removal & Restoration, GOGA

Technical Specifications / Statement of Work

This document outlines the technical specifications for the Conlon Road Stream Stabilization project located in Muir Woods National Monument, Golden Gate National Recreation Area, California. The project aims to stabilize the Conlon Creek channel and its adjoining tributary channel.

• Work in Conlon Creek Channel and Embankments:

  • Install water diversion and dewatering systems.
  • Conduct site preparations including salvaging native plants, clearing, and grubbing.
  • Remove and dispose of existing culvert and headwalls.
  • Grade channel and channel banks as shown on drawings.
  • Install rock weirs and grade control structures.
  • Install salvaged native plants.
  • Install permanent erosion control measures.

• Work in Tributary to Conlon Creek:

  • Conduct site preparations, clearing, and grubbing.
  • Bury removed Rock Slope Protection (RSP) in the tributary channel bottom.
  • Place and compact excavated soils from Conlon Creek channel into the tributary channel.
  • Excavate and place RSP materials at rock control structures.
  • Install permanent erosion control measures.

• The project will be constructed under a single prime contract.

• The project is based on a drawing set titled "Conlon Creek Stream Stabilization, February 2026" and a single set of specifications.

• Submittals: Numerous submittals are required, including a Construction Baseline Schedule, Site-Specific Accident Prevention Plan, Dewatering and Water Diversion Plan, Access Plan, Traffic Management Plan, Quality Control Plan, and Waste Management Plan, among others. These are due at various times before and during the project.

• Work Windows: The permissible work window for equipment in the channel or on creek banks is June 15 to October 15. Handwork on channel banks is permissible after October 31.

• Not specified in this document.

• The project is located within a protected old-growth redwood forest.

• Environmental protection is a critical component of all aspects of this work.

• Access to the staging area is via the Conlon Parking Lot.

• Caltrans has restrictions for oversized vehicles on a segment of State Highway 1, requiring permits and potentially CHP escorts.

• NPS will be responsible for biological, archeological, and Tribal monitoring.

• No work is permitted during night hours; all work must be conducted during daylight hours.

• The project site is not open to the public during construction.

• Hazardous materials encountered during construction will require immediate notification to the Contracting Officer and may halt construction until remediation is complete.

• Invasive species and pathogen protection measures are required, including disinfection of boots and equipment.

Solicitation / RFP / RFQ

This solicitation is for the Conlon Creek Culvert Removal & Restoration project at the Golden Gate National Recreation Area (GOGA) in Marin County, California. The project aims to implement a long-term channel stabilization to repair damage caused by a culvert blowout on a tributary to Redwood Creek. The work involves stabilizing the culvert failure footprint with an engineered rock ramp, creating three rock step pools for aquatic habitat, removing an 80 ft corrugated metal culvert, and stabilizing an adjacent 75 ft gully contributing sediment to Redwood Creek.

• Removal of a buried and rusted corrugated metal culvert (80 ft).

• Stabilization of the culvert failure footprint with an engineered rock ramp.

• Construction of three rock step pools for aquatic habitat.

• Stabilization and filling of an adjacent gully (75 ft) to reduce sediment contribution.

• Reuse of existing bank and bed materials for stabilization and fill.

• All work in the channel must be completed by October 15, 2026.

• Site-specific safety and health plan required.

• Davis-Bacon Wage Rates apply.

• Contract Type: Firm-fixed-price.

• Period of Performance: 365 calendar days after notice to proceed.

• Estimated Value: Offers sought within the range of $500,000 - $700,000.

• Proposal Submission Deadline: June 22, 2026, by local time.

• Proposals must be submitted via email.

• Questions due seven (7) calendar days prior to the proposal due date, submitted via email to Quinn_Rankin@ios.doi.gov.

• A site visit is scheduled for Monday, June 15, 2026, 1:00 PM – 3:00 PM PDT at Muir Woods Sewer Lift Station Dirt Lot.

• Evaluation will be based on a Best Value Continuum Tradeoff Process, considering technical factors and price.

• Key evaluation factors include Technical Approach, Schedule, Project Experience, Key Personnel Experience, and California Contractor State License.

• This acquisition is a Total Small Business Set-Aside. Offers are solicited only from small business concerns.

• NAICS Code: 237990 (Other Heavy and Civil Engineering Construction).

• Size Standard: $45 million in annual gross receipts.

• Attachments include Specifications, Drawings, Wage Decision, Proposal Submission Package Cover Page, Project Experience Questionnaire, Key Personnel Experience, Past Performance Questionnaire, Response Forms, General References, Subcontracting Percentage Worksheet, and Standard Form 24 (Bid Bond).

• Offerors must be registered in the System for Award Management (SAM).

Other / Unclassified

This document is a General Decision Number (GDN) for California, specifically CA20260007, effective January 23, 2026. It supersedes the previous decision number CA20250007. The GDN outlines prevailing wage rates and fringe benefits for various construction trades across multiple California counties for Building, Heavy (Heavy and Dredging), and Highway construction types.

This document is crucial for bidders on federal construction projects in California, as it establishes the minimum wage rates and fringe benefits that must be paid to laborers and mechanics employed on such projects. Bidders must consult this document to ensure their proposals and subsequent labor practices comply with federal requirements, thereby avoiding potential penalties and ensuring fair compensation for workers.

Form / Attachment / Pricing Sheet

This document is a Past Performance Questionnaire intended for offerors to gather feedback from references regarding their past performance on previous contracts. Offerors are to complete Sections A and B, then transmit the questionnaire to a designated reference. The reference will then complete Sections C and D and return it to the Contracting Officer.

• Offeror Information: Company Name, UEI Number, Point of Contact.
• Contract Information: Project Title, Contract Number, Contract Type, Awarded/Current Price, Award/Completion Dates, Period of Performance, Project Location, Client/Owner, Scope of Work Description.
• Reference Information: Name, Position/Title, Organization, Phone, Email.
• Evaluation Areas: Ratings for Quality, Schedule (& Time Management), Cost Control, Management, Small Business Subcontracting (& Labor Standards), and Regulatory Compliance. Each area includes specific questions and an overall rating.
• Rating Definitions: Provides definitions for Exceptional, Very Good, Satisfactory, Marginal, and Unsatisfactory ratings.
• Overall Recommendation & Comments: Space for the reference to provide a final recommendation and overall comments.
• Return Instructions: Specifies the return deadline (Wednesday, June 17, 2026, 3:00 PM PDT) and the contact person (Quinn Rankin, Contract Specialist, DOI - National Park Service).

This questionnaire is crucial for bidders to provide to their past performance references. The feedback collected will be used as source selection information. Bidders must ensure they accurately complete their sections and provide clear instructions to their references to ensure timely and comprehensive responses that reflect positively on their past performance.

Form / Attachment / Pricing Sheet

This document is a certification provision (FAR 52.209-13) that requires offerors to certify whether they have engaged in activities that contributed to a foreign country's determination of being in violation of arms control, nonproliferation, or disarmament agreements. It applies to acquisitions above the simplified acquisition threshold and not for commercial products/services.

• Applicability: Does not apply to acquisitions below the simplified acquisition threshold or to commercial products/services.
• Certification Options: Offerors must choose one of two options:
  1. Certify that neither the offeror nor any entity owned or controlled by the offeror has engaged in activities contributing to a determination of a foreign country's violation of arms control agreements, as described in the annual unclassified report to Congress (available at https://www.state.gov/bureaus-offices/under-secretary-for-arms-control-and-international-security-affairs/bureau-of-arms-control-verification-and-compliance/).
  2. Provide separate information with the offer if the President has waived application or determined the entity has ceased all activities for which measures were imposed.
• Procedures: Guidance is provided on how to review the annual report to make the determination.
• Submission: A certification must be provided with the offer, or alternative information as described in option (d)(2).
• Remedies: A false certification is a material representation, and knowing submission of a false certification can lead to contract termination and other government remedies.

Bidders must carefully review this provision and the referenced annual report to determine their eligibility and to complete the required certification accurately. Failure to provide a correct certification may impact the ability to be awarded a contract.

Form / Attachment / Pricing Sheet

This document outlines the requirements for offerors regarding veteran employment reporting, specifically referencing the VETS-4212 Report as mandated by clause 52.222-38.

• VETS-4212 Report Requirement: Offerors must have filed their most recent VETS-4212 Report if they were awarded Federal Government contracts priced at or above $150,000 in the past year.
• Alternative Statement: If an offeror has not been awarded a Federal Government contract priced at or above $150,000 in the last year, they must submit a written statement to that effect.
• Offeror Certification: The form includes checkboxes for the offeror to indicate whether they have filed the VETS-4212 report or if no filing was required due to contract value.
• Submission Details: Fields are provided for signature, typed name, company name, and Unique Entity ID.

This attachment is critical for bidders to understand their compliance obligations related to veteran employment reporting. Bidders must accurately certify their status regarding the VETS-4212 report to ensure their offer is compliant. Failure to meet this requirement may impact the evaluation or award of the contract.

Form / Attachment / Pricing Sheet

This document is a form for offerors to provide general references to the Government, as described in Section L (Instructions, Conditions, and Notices to Offerors) of the Solicitation. It requires specific information about the offeror's surety, corporate bank(s), insurance company, subcontractors, and material suppliers.

• Offeror Information: Name of the Offeror.

• Surety: Name, address, agent, telephone number, and email of the surety.

• Corporate Bank: Name, address, agent, telephone number, email, and types/numbers of accounts for one or two corporate banks.

• Insurance Company: Name, address, agent, telephone number, email, and types of policies.

• Subcontractor: For each subcontractor, provide name, address, contact name, telephone number, and area of specialized work.

• Material Supplier: For each material supplier, provide name, address, contact name, telephone number, and types of material.

• Read carefully.

• Provide general references in the spaces provided.

• Include Area Codes with all telephone numbers.

• Fill in the information by typing or printing legibly.

This form is a required submission for offerors. Bidders must accurately complete and provide the requested reference information for their surety, banking, insurance, subcontractors, and suppliers to comply with the solicitation requirements.

Form / Attachment / Pricing Sheet

This document is a template for reporting on the Limitations on Subcontracting (LOS) for a construction contract. It is used to track payments made to the prime contractor and any subcontractors (similarly situated and non-similarly situated).

• Contract Number (PIID): 140P8626R0003
• Type of Set Aside: Total Small Business Set Aside
• Total Contract Value: Placeholder for bidder to insert their total proposed price.
• Performance Period for This Report: 365 days
• Type of Service: Construction by special trade contractors
• Sections for detailing amounts paid to the prime, similarly situated subcontractors (SSS), and non-similarly situated subcontractors (NSS).
• Calculation for Limitation on Subcontracting Percentage.

Bidders must use this template to understand and report on their subcontracting compliance. It outlines the specific data points required for tracking payments and calculating the Limitation on Subcontracting percentage, which is crucial for meeting the terms of the Total Small Business Set Aside.

Forms / Attachments / Pricing Sheets

This document is a set of construction drawings for the Conlon Creek Stream Stabilization project within Muir Woods National Monument. It provides detailed plans, profiles, sections, and notes necessary for the construction and implementation of the stream stabilization efforts.

• Sheet G0.1 (Title Sheet & Index): Provides an overview of the project, sheet index, and relevant project information.
• Sheet G0.2 (Legend & Notes): Details the symbols, abbreviations, and general notes applicable to the construction drawings.
• Sheet G0.3 (Demolition and Protection Plan): Outlines areas for demolition and existing features to be protected.
• Sheet G0.4 (Site Access & Staging): Illustrates the proposed site access routes, staging areas, and traffic control measures.
• Sheet C1.0 (Proposed Centerline Coordinates): Lists the coordinates for the proposed stream centerline.
• Sheet C1.1 (Proposed Conditions): Shows the proposed design of the stream channel, including weirs, pools, and revetments.
• Sheet C1.2 (Conlon Creek Profile): Presents the longitudinal profile of Conlon Creek, detailing existing and proposed grades and structures.
• Sheet C1.3 (Tributary Profile & Cross Sections): Includes profiles and cross-sections for tributaries and details of various stream stabilization elements.
• Sheet C1.4 (Details): Provides specific construction details for erosion control blankets, gravel entrance roads, and tire wash facilities.
• Sheet E1.1 (Erosion Control Plan): Details the erosion and sediment control measures to be implemented during construction.

These drawings are critical for bidders to understand the full scope of work, including demolition, site preparation, stream channel reconstruction, erosion control, and site access. They provide the technical specifications and design details required for accurate bidding and successful project execution.

Solicitation / RFP / RFQ

This document is a Request for Proposal (RFP) for the Conlon Creek Culvert Removal & Restoration project at Muir Woods National Monument, Golden Gate National Recreation Area. The solicitation number is 140P8626R0003.

This RFP outlines the requirements for the removal of a culvert and subsequent restoration activities. Specific details regarding the scope of work are expected to be found within the full solicitation package, which includes various forms and instructions.

Not specified in the provided text.

This document serves as a Proposal Submission Package. It highlights that many government-provided forms mentioned in Section L (Instructions for the Submission of Offers) are included for convenience. Offerors are cautioned that some submission criteria may not have provided forms, and careful review of Section L is required for proposal preparation.

Not specified in the provided text.

The document includes a table of contents for different proposal volumes:

• Volume I (Technical & Past Performance): Includes Project Experience Questionnaire and Past Performance Questionnaire.
• Volume II (Business & Price): Includes Standard Form (SF) 24 Bid Bond, Copy of Provision 52.209-13, Response to Provision 52.222-38, Key Personnel Qualifications form, General References form, and Subcontracting Percentage.

Offerors are advised to carefully read Section L of the Solicitation for detailed proposal preparation instructions.

Form / Attachment / Pricing Sheet

This document is a Project Experience Questionnaire required for Solicitation 140P8626R0003. It is designed to gather information from offerors demonstrating their relevant experience in successfully completing projects of similar nature and scope to the government's requirement. Responses should be submitted per the instructions in Section L of the Solicitation.

• Offeror Information: Company Name.
• Referenced Project Information: Project Title, Location, Period of Performance, Brief Description, Project Owner, and Point of Contact (POC).
• Contractor List: Details for each contractor (Prime and Subcontractors) including their Role, Trade, Price, and Performance Period (Original and Final).
• Project Experience Questions: A series of seven questions requiring detailed responses about:
  1. Project work performed by listed contractors.
  2. Alignment of contractor work with Project Experience elements in Section L.
  3. Reasons for changes to original project price.
  4. Reasons for changes to original project schedule.
  5. Problems encountered, resolutions, and how the offeror's proposal accounts for similar issues.
  6. Successful means and methods used, and their applicability to the proposed project.
  7. Any other relevant project information.

Bidders must complete this questionnaire to demonstrate their qualifications and past performance. The document outlines the specific information required regarding past projects, including details about the scope of work, pricing, schedule, challenges, and resolutions. This is crucial for the government's evaluation of the offeror's capability to perform the work described in the solicitation.

Form / Attachment / Pricing Sheet

This document is a form for Offerors to list the qualifications of all key personnel proposed for the project. It is intended to be completed as described in Section L (Instructions for the Submission of Offers and Other Information) of the Solicitation.

• Contractor/Offeror Name: To be filled in by the Offeror.
• Proposed Sub-Contractor Name: To be filled in if applicable.
• Personnel Information: For each key individual, provide:
  • Name
  • Job Title
  • Years of Experience with This Firm
  • Years of Experience with Other Firms
  • Proposed Role on This Project
• Education and Professional Registration: For each key individual, provide:
  • Top Educational Level Obtained
  • Year of Graduation
  • Area of Specialization
  • Professional Registrations (including state and license number if applicable)
  • Area of Specialization for Registrations
• Experience and Qualifications: A section to detail relevant job-related training, certificates, licenses, honors, performance awards, and specialty skills. Dates should be provided, but supporting documents are not to be submitted.

Bidders must carefully complete this form to detail the experience and qualifications of their proposed key personnel. This information is crucial for demonstrating the Offeror's capability to successfully perform the work described in the Solicitation and is likely a significant factor in the evaluation of proposals.

Form / Attachment / Pricing Sheet

This document is a Standard Form 24 (Rev. 10/2023), a Bid Bond. It is used to guarantee that a bidder will enter into a contract if awarded and will furnish any required performance bonds. It serves as a bid guaranty.

• Principal: Information about the bidder (legal name, address, type of organization).
• Surety(ies): Information about the surety company or companies providing the bond (name, address, state of incorporation, liability limit).
• Penal Sum of Bond: The maximum amount the surety is liable for, typically a percentage of the bid price.
• Bid Identification: Includes Bid Date, Invitation Number, and the type of procurement (e.g., Construction).
• Obligation: Outlines the conditions under which the bond is void (e.g., if the principal executes the contract and provides required bonds, or pays for procurement costs if they fail to do so).
• Conditions: States that the Principal has submitted the bid.
• Signatures: Spaces for the Principal and Surety(ies) to sign and affix seals.

Bidders are required to complete and submit this form as part of their bid package if a bid guaranty is required by the solicitation. It ensures the government that the bidder is financially capable and committed to entering into a contract if awarded. Failure to provide a properly executed bid bond may result in bid rejection. The form details the specific information required from both the principal (bidder) and the surety.

Presolicitation Notice / Solicitation

This notice announces the National Park Service's (NPS) requirement for a long-term channel stabilization project at Conlon Creek, Golden Gate National Recreation Area, Marin County, California. The project aims to repair damage from a 2015 culvert blowout on a tributary to Redwood Creek. The work involves stabilizing the culvert failure footprint and an adjacent gully to reduce sediment contributions.

• Stabilize culvert failure footprint and head cut with an engineered rock ramp.

• Construct three rock step pools for aquatic habitat.

• Remove an 80 ft buried and rusted corrugated metal culvert.

• Stabilize and fill an adjacent 75 ft gully contributing sediments.

• Utilize existing bank and bed materials where possible; purchase and transport rock slope protection.

• Contract work includes: Mobilization/Demobilization, Dewatering Systems, Selective Demolition, Construction of Weirs/Ramp/Apron, and Permanent Erosion Control/Plantings.

• Option items include: Hauling excess soils, preparing As-Built Drawings, and importing rock for engineered streambed material.

• The government intends to award a single, firm-fixed-price contract.

• In-channel work is restricted to between June 15 and October 15, 2026.

• The Request for Proposal (RFP) will be available on or about May 18, 2026, via www.sam.gov.

• The RFP will close 30 days from its issuance date.

• Offerors are responsible for checking www.sam.gov for amendments.

• Evaluation will be based on a Best Value determination considering price and factors other than price (Technical Approach, Schedule, Project Experience, Key Personnel Experience, California State Contractor License, and Past Performance).

• An organized site visit is scheduled (details in Section L of the RFP).

• This acquisition is a Total Small Business Set-Aside. Offers are solicited only from small business concerns.

• NAICS Code: 237990, with a size standard of $45 million in annual gross receipts.

• All work must comply with local, state, and federal laws, and the Contractor must obtain all necessary permits.

• Information regarding policies and procedures for definitization of equitable adjustments for change orders under construction contracts can be found at the provided DOI link.