Z--MACA - REHAB CAVE TRAILS

Amendment / Modification

• This amendment (Amendment 2) is issued to post Questions & Answers (Q&A) and drawings 70 through 77 (Electrical Drawings).

• The due date for offers has been extended to May 21, 2026, at 5:00 PM EDT.

• The Period of Performance has been updated to 09/08/2026 to 02/28/2027.

• Item 00010 (Base Item: Reconstruct Karnak Cave Trail) has been modified.

• Item 00020 (Base Item: Reconstruct River Hall Cave Trail) has been modified.

• Item 00030 (Option Item: Reconstruct Rafinesque Cave Trail) has been modified.

• Q&A and Electrical Drawings (70-77) are now posted.

• The proposal due date has been extended to May 21, 2026, at 5:00 PM EDT.

Questions & Answers / Clarifications

This document provides responses to vendor questions regarding the MACA Rehab Cave Trails opportunity, as part of Amendment 2.

• Material Use: Plywood (1/4" thickness) is an acceptable alternative to rubberized mats for carrying materials via non-motorized methods.
• Project Schedule: The Period of Performance (POP) is 150 days from Notice to Proceed (NTP). Construction cannot begin before Labor Day (September 7, 2026). The POP dates have been amended to accommodate this.
• Submittal Review NTP: A separate NTP will be issued for submittal review. Field measurements are acceptable upon COR approval at least one week in advance. The CO will issue an NTP for submittals upon award if needed.
• Electrical Drawings: Missing electrical drawings (70-77) have been provided as final E-pages.
• Pollution Prevention: A SWPPP/NDPES Permit is a required submittal prior to the pre-construction meeting.
• Bid Date Extension: The bid due date has been extended to May 21, 2026, at 5pm EDT.

Several aspects of the solicitation have been clarified or modified, including material usage, project scheduling, submittal processes, and the bid due date. Bidders should review these answers carefully to ensure accurate proposal preparation.

Forms / Attachments / Pricing Sheets

This document contains construction drawings and specifications related to "Temporary Construction Power Requirements" and "Lighting Demo and New Work" for the reconstruction of trails at Mammoth Cave National Park. It details electrical system requirements, including temporary power tie-in points, transformer schedules, wiring specifications, luminaire details, and installation methods.

• Temporary Construction Power: Details on tie-in points, existing transformer schedules, and dry-type transformer schedules.
• Lighting Demo and New Work: Specifications for existing and new lighting fixtures, including types, manufacturers, models, and installation requirements. It also covers cable specifications (material, installation, concealment methods), raceways, junction boxes, and panelboards.
• NEC Equivalency: A specific variance for electrical cable burial depth in the cave environment, allowing for shallower burial with protective measures due to cultural and natural resource sensitivity.
• Drawings: Includes schematics and details for various trail sections (River Hall Trail, Ruins of Karnak Trail, Rafinesque Avenue Trail) illustrating proposed electrical work.

This document is crucial for bidders involved in the electrical aspects of the Mammoth Cave National Park trail reconstruction project. It provides the technical specifications and design details necessary for understanding the scope of work, material requirements, installation procedures, and site-specific constraints for both temporary power and new lighting installations within the cave environment.

Form / Attachment / Pricing Sheet

This document is a sign-in sheet for a site visit related to the opportunity. It records the names, organizations, and contact information of attendees.

• Names of individuals who attended the site visit.
• Their respective organizations or companies.
• Contact information (email and/or phone number).

This document indicates which companies have expressed interest and attended the site visit, potentially providing insight into the competitive landscape. The contact information may be useful for networking or follow-up related to the opportunity.

Amendment / Modification

• Amendment 0001 is issued to post the site visit sign-in sheet and updated clauses.

• The due date for offers remains the same.

• The period of performance is from 09/01/2026 to 02/28/2027.

• Site visit sign-in sheet and clauses have been updated.

• The due date for offers has not been changed.

Solicitation / RFP / RFQ

This solicitation seeks proposals for a Firm Fixed Price Construction contract. The project involves construction, alteration, or repair work, specifically for the "Ruins of Karnak" (Base Item #1) and "River Hall" (Base Item #2), with an option for "Rafinesque Avenue." The period of performance is 150 days from Notice to Proceed.

• Provide all labor, materials, supervision, and equipment for the required work as per attached Specifications and Drawings.

• Develop and implement a Site-Specific Safety Plan (SSSP) in accordance with NPS Reference Manual RM50B, Chapter 21, addressing hazards in confined underground/cave environments. Work cannot commence until the SSSP is accepted.

• Comply with all incorporated contract clauses, including those related to inspection, warranties, labor standards, environmental protection, and insurance.

• Specific requirements include construction of trail systems with pavers/curbs in underground/confined environments, material transport in restricted areas, implementation of underground-specific safety plans, and performance in highly visited public facilities.

• Contract Type: Firm Fixed Price Construction.

• Period of Performance: 150 days from Notice to Proceed.

• Location of Performance: Mammoth Cave National Park, Mammoth Cave, KY, 42259.

• Proposals are due by 5 PM EDT on May 15, 2026.

• Submission is electronic via email to Ashley_Warcewicz@ios.doi.gov.

• Evaluation is based on Lowest Price Technically Acceptable (LPTA).

• Technical Capability and Past Performance are evaluated on a Pass/Fail basis.

• Award will be made to the responsible offeror with the lowest evaluated price whose proposal meets all acceptability standards.

• Key deadlines include a question submission deadline of May 6, 2026, and a pre-proposal conference/site visit on April 29, 2026.

• This acquisition is a competitive, 100% Small Business Set-Aside.

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

• Specific representations regarding small business status are required.

• The solicitation includes numerous attachments, including Project Specifications, Drawings, Wage Determination, and a Price Schedule.

• Offerors must submit a Bid Guarantee of 20% of the bid price.

• Liability insurance and Performance/Payment Bonds are required.

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

This document, NPS Reference Manual 50B Occupational Safety and Health Program, Chapter 21 – Contractor Operations, outlines the safety and health responsibilities and requirements for contractors performing work for the National Park Service (NPS).

• Establishes that contractors are accountable for minimizing safety and health hazards caused by their operations and activities, in accordance with federal laws and procurement regulations.

• Applies to all construction contracts and contractors performing work for the NPS, regardless of company size or location.

• Emphasizes that this policy is intended to improve contractor safety but does not relieve contractors of their legal duties or standards of care.

• Contractors must provide a safe and healthful working environment for their employees and protect NPS employees and visitors from job site hazards.

• Requires contractors to comply with all applicable local, state, and federal safety and environmental regulations and requirements (whichever is more stringent).

• Mandates the development and implementation of a Site-Specific Safety Plan (SSSP) by the contractor.

• Not explicitly defined in this document, but applies to all contractor operations on NPS project sites.

• Responsibilities: Clearly defines the roles and responsibilities of NPS personnel (Initiating NPS Employee, Contracting Officer, Contracting Officer Representative, Superintendent, Safety Manager/Safety Engineer, NPS Safety Representative) and Contractors.

• General Requirements: Outlines steps for ensuring compliance, including pre-planning consultations, pre-award meetings, preconstruction meetings, and periodic inspections.

• Site Safety: Requires contractors to maintain good housekeeping, post specific information (DOL posters, emergency routes, emergency numbers, SSSP copy, OSHA 300A), and leave the worksite clean.

• Accident Prevention: Mandates that contractors ensure identified hazards and controls are in place and communicated, and that the COR immediately stops unsafe work if imminent danger is observed.

• Site-Specific Safety Plan (SSSP) Components: Requires the SSSP to include a Signature Sheet, Background Information, Responsibilities and Authority, Subcontractors and Suppliers information, Training details, Risk Assessment/Management (including Job Hazard Analysis), Plans/Programs/Procedures, Housekeeping, Safety and Health Inspections, Emergency Contacts/Medical Support, Accident Reporting, Fire Protection and Prevention, Hazard Communication, Public Risk Management, and a Contingency Plan for Severe Weather.

• Technical Appendices: Provides a link to an example Pre-Start Up Project Site-Specific Safety Plan Review Checklist.

Solicitation / RFP / RFQ

This solicitation is for construction services at Mammoth Cave National Park, Mammoth Cave, KY, 42259. The contractor will be required to provide all labor, materials, supervision, and equipment necessary to perform the work in accordance with the attached Specifications and Drawings.

• Reconstruct Karnak Cave Trail (Base Item #1)

• Reconstruct River Hall Cave Trail (Base Item #2)

• Reconstruct Rafinesque Cave Trail (Option Item #3)

• Work involves construction of trail systems, material transport in restricted-access environments, implementation of project-specific safety plans for underground hazards, and performance in active, highly visited public facilities.

• Contract Type: Firm Fixed Price Construction

• Period of Performance: 150 days after Notice to Proceed (NTP).

• Estimated Value: Not explicitly stated, but construction magnitude for similar size and complexity is defined between $500,000 and $5,000,000.

• Proposal Submission Deadline: May 15, 2026, 5 PM EDT.

• Proposals must be submitted electronically via email.

• Evaluation Criteria: Lowest Price Technically Acceptable (LPTA). Proposals will be evaluated on Technical Capability (Pass/Fail) and Past Performance (Pass/Fail). Only proposals rated Acceptable for both will be considered for award. Award will be made to the responsible offeror with the lowest evaluated price.

• Key Deadlines:

  • Pre-proposal Conference/Site Visit: April 29, 2026, 10 AM CDT
  • Questions Due: May 6, 2026, Noon EDT
  • Proposal Due Date: May 15, 2026, 5 PM EDT

• This acquisition is a Competitive, 100% Small Business Set Aside.

• The solicitation includes numerous FAR and agency-specific clauses covering various aspects of construction, safety, insurance, labor, and reporting.

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

• A Site-Specific Safety Plan (SSSP) will be required.

• Liability insurance requirements are specified.

Other / Unclassified

This document references Federal Acquisition Regulation (FAR) 36.211(b), which requires agencies to provide descriptions of policies and procedures related to the definitization of equitable adjustments for change orders under construction contracts. It also mandates the provision of data on the time required for such definitization.

This information is available at the following link: https://www.doi.gov/pam/acquisition/policy/constructioncontract. Bidders should consult this link for details on the agency's policies and procedures concerning change order definitization, which may be relevant to understanding contract administration for construction opportunities.

Form / Attachment / Pricing Sheet

This document is a Contract Price Schedule template for the National Park Service (NPS). It is intended for offerors to submit pricing for the "Reconstruct Ruins of Karnak, River Hall and Refinesque Hall Cave Trail" project.

• Solicitation Number: Not specified in this template.
• PARK - PMIS: MACA 229870 - 258616 - 258617
• Project Title: Reconstruct Ruins of Karnak, River Hall and Refinesque Hall Cave Trail
• Developed Area: Historic Trail
• Contract Line Items (CLINs): Includes CLINs for "Ruins of Karnak" (Base), "River Hall" (Base), and "Option 1 - Rafinesque Avenue" (Option).
• Pricing: Requires offerors to provide pricing for Base and all Option line items. Lump-sum items require a total price, while unit-priced items require unit and extended total prices. Calculations should be rounded to whole dollars.
• Measurement and Payment: Information is detailed in Division 01 Specifications Section 01 27 00.

Offerors must submit pricing that conforms to the solicitation documents, including pricing for all base and option line items. Failure to do so may result in an unacceptable proposal. This template guides bidders on how to structure their pricing submission for the specified project components.

Form / Attachment / Pricing Sheet

This document outlines the requirements for bidders to demonstrate relevant prior experience for the solicitation. It serves as a template for providing evidence of the Offeror's firm and/or proposed subcontractors' experience in performing work similar in type and complexity to that described in the solicitation.

• Timeframe: Experience must have been completed within the last seven (7) years.
• Scope: Must include similar work in type and complexity, specifically related to confined cave or underground environments of similar scope and logistical complexity.
• Construction Magnitude: Projects should be within the range of $1,000,000 - $5,000,000.
• Specific Experience Areas:
  • Construction of trail systems (pavers, curbs, structural path improvements) in underground caves, mines, or similarly confined environments open to the public.
  • Material transport and staging in restricted-access environments.
  • Work performed without excavation in archaeologically sensitive areas (if applicable).
  • Implementation of confined-space or underground-specific safety plans.
  • Experience in highly visited National Park or equivalent public facilities.
• Subcontractor Information: If subcontractors are proposed, their name and the work they will perform must be detailed.
• Project Details to Document:
  • Name of Agency/Customer
  • Project Location
  • Project Value
  • Performance Dates
  • Description of the Project and Scope of Work
  • Problems Encountered and Corrective Actions
  • Successes Achieved

Bidders must carefully review these requirements and provide detailed evidence of their firm's or proposed subcontractors' qualifications. This includes demonstrating experience with specific types of construction, material handling, safety protocols, and project values within confined or underground public environments. Failure to adequately demonstrate relevant experience may impact proposal evaluation.

Form / Attachment / Pricing Sheet

This document is a Past Performance Questionnaire (PPQ) required by the U.S. Department of the Interior, National Park Service. It is used to gather feedback on a company's past performance for a project opportunity.

• Section A: To be completed by the offeror, including project title, location, description, company name, Unique Entity ID/Cage Code, owner/project manager, email, start/completion dates, and initial/final amounts.
• Section B: To be completed by the evaluator (project owner/reference), including evaluator details, ratings overview (Outstanding, Above Average, Satisfactory, Marginal, Unacceptable), and specific questions regarding contractor performance.
• Questions: Cover relationship with client, management, quality control, schedule adherence, safety planning, performance in public facilities, underground work, issuance of notices, likelihood of re-award, customer satisfaction, and opportunity for contractor response to negative comments.

Offerors must complete Section A and provide this questionnaire to their project owner/evaluator. The completed questionnaire is to be submitted to the contracting point of contact (ashley_warcewicz@ios.doi.gov) by the date and time specified in the solicitation. Bidders may submit between 2-5 PPQs for projects completed within five years of the evaluated contract's completion. This document is crucial for proposal evaluation as past performance is a key factor.

Other / Unclassified

This document is a "Geophysical Exploration Report" prepared by Terracon Consultants, Inc. for VHB, dated August 30, 2022. It details the findings of a Ground Penetrating Radar (GPR) survey conducted on February 2, 2022, within Mammoth Cave National Park. The survey focused on the Rafinesque Hall, River Hall, and Ruins of Karnak trail areas to determine the approximate thickness of the surface soil layer and identify subsurface anomalies such as bedrock, voids, buried concrete, and utilities.

This report provides crucial subsurface data that will inform the design and execution of trail improvements. Understanding the depth to bedrock and identifying potential subsurface obstructions is essential for planning excavation, backfilling, and the placement of new trail materials, ensuring the project's feasibility and safety. The report includes detailed findings, limitations, and conclusions regarding the geophysical survey.

Form / Attachment / Pricing Sheet

This document contains the "Sheet Index" for the "MACA 229870-258617-258616 - Final CDs" (Construction Documents). It lists all the individual sheets within the document set, organized by sheet number, sub-sheet, title, and the Contract Line Items (CLINS) they pertain to.

• Sheet Number: Sequential numbering from 01 to 77.
• Sub Sheet: Further categorization within a sheet number (e.g., G1, C0.01, S1.0).
• Title of Sheet: A brief description of the content of each sheet (e.g., "COVER SHEET", "GENERAL NOTES & ABBREVIATIONS", "EXISTING CONDITIONS PLAN", "DEMOLITION PLAN", "GRADING PLAN", "LAYOUT PLAN", "CROSS SECTIONS", "PROFILES", "SITE DETAILS", "PLATFORM FRAMING PLAN", "STRUCTURAL GENERAL NOTES", "TYPICAL DETAILS").
• CLINS: Indicates which Contract Line Items (CLINs) are associated with each sheet. CLINs are numbered 1, 2, and 3, corresponding to "RUINS OF KARNAK", "RIVER HALL", and "RAFInESQUE AVENUE" respectively.

This sheet index is crucial for bidders to understand the complete scope of the construction documents. It allows for quick navigation to specific areas of interest, such as the "RAFINESQUE HALL CAVE TRAIL", "RIVER HALL TRAIL", and "RUINS OF KARNAK TRAIL" projects, and helps in identifying which parts of the project are covered by each CLIN. Bidders can use this to efficiently locate all relevant drawings for each component of the work.

Form / Attachment / Pricing Sheet

This document is a General Decision Number (GDN) for prevailing wages, specifically for heavy construction projects in Edmonson County, Kentucky. It provides the minimum wage rates and fringe benefits that must be paid to various laborers and mechanics employed on construction projects covered by the Davis-Bacon Act and related acts.

• General Decision Number: KY20260068
• Effective Date: 01/02/2026
• Construction Type: Heavy
• Geographic Area: Edmonson County, Kentucky
• Project Type: Heavy Construction Projects (including sewer/water construction)
• Classifications and Rates: Lists specific trades (e.g., Carpenter, Electrician, Power Equipment Operator, Ironworker, Laborer) with their corresponding hourly wage rates and fringe benefits.
• Special Notes: Includes information on additional pay for crane operators based on boom length, a 10% increase for work below ground level, and references to Executive Orders 13706 (Paid Sick Leave) and 13658 (Minimum Wage).

Bidders must use this wage determination to accurately estimate labor costs for their proposals on relevant federal or federally-funded construction projects in the specified county and project type. Failure to comply with these wage requirements can lead to penalties. The document also outlines the process for appealing wage determinations and provides contact information for the Department of Labor.

Form / Attachment / Pricing Sheet

This document is a template for reporting on the Limitation on Subcontracting (LOS) requirements for government contracts. It provides a structured format for contractors to report on amounts paid to the prime contractor, similarly situated subcontractors (SSS), and non-similarly situated subcontractors (NSS) during a specific performance period.

• Contract Information: Fields for Contract Number (PIID), Type of Set Aside, and Total Contract Value/Ceiling.
• Performance Period: Dates for which the report is being submitted.
• Payment Breakdown: Sections to detail amounts paid to the prime, SSS, and NSS.
• Limitation on Subcontracting Percentage Calculation: A formula is provided to calculate the percentage of work performed by the prime versus subcontractors.
• Multiple Sheets: The Excel file contains sheets for "Template for Contracts and Indi" and "Template for IDVs," suggesting it can be used for both individual contracts and Indefinite Delivery Vehicles (IDVs) with multiple task orders.

Bidders should use this template to understand the reporting requirements related to subcontracting limitations. While this is a template, it indicates that compliance with subcontracting goals will be monitored. Understanding these requirements is crucial for developing a compliant subcontracting plan and ensuring proper reporting if awarded the contract.

Pre-Solicitation Notice

This document serves as a pre-solicitation notice for an upcoming solicitation regarding the "MACA - REHAB CAVE TRAILS" project. The project's purpose is to reconstruct deteriorating cave trail surfaces in the Ruins of Karnak, River Hall, and Rafinesque Hall within Mammoth Cave National Park.

The project includes:

• Preparation of existing ground for footings.

• Removal of existing handrails.

• Installation of concrete footings for an elevated platform.

• Installation of an elevated platform constructed from fiber-reinforced plastic (FRP).

• Installation of 2-inch stainless steel handrails.

• Transportation of all materials and equipment into and out of the cave. Upon completion, the trail surface will be sustainable and provide a safe environment for park visitors and staff.

• The NAICS Code for this requirement is 238990 – All Other Specialty Trade Contractors.

• The estimated contract value is $19M.

• The solicitation will be issued electronically on SAM.gov.

• Proposal documents will be available in Microsoft Word, HTML, Microsoft Excel, and Adobe PDF formats.

• Specifications will be available in Adobe PDF format.

• Drawings will be available in PDF format.

• Paper copies of the solicitation will not be made available.

• Proposed Solicitation Issue Date: 4/20/2026

• Completion Date: 2/28/2027

• No phone calls will be accepted.

• This requirement is a Total Small Business set-aside.

• Offerors are encouraged to contact their local Small Business Administration Office for subcontracting opportunities.

• Vendors must have an active registration in the Systems for Awards Management (SAM) at SAM.gov.

• A Unique Entity Number is required to conduct business with the Federal Government.

• Interested vendors and plan holders are required to visit SAM.gov periodically for amendments and changes.