Z--KNRI REPLACE VC SANITARY PLUMBING/SEPTIC

Amendment / Modification

• Amendment 0002 to Solicitation 140P6326B0006 is effective May 15, 2026.

• The primary purpose of this amendment is to provide responses to questions received from the site visit. These responses are provided in an attachment (not included in the provided text).

• No other changes are made by this amendment.

• The amendment modifies the solicitation, specifically addressing questions and providing answers via an attachment.

• The amendment extends the hour and date for receipt of offers. The new date is May 15, 2026.

• For questions regarding this amendment, contact contract specialist Joseph Kirk at joseph_kirk@ios.doi.gov or 605.574.0510.

Questions & Answers / Clarifications

This document provides responses to contractor questions regarding the VC Sanitary Sewer Plumbing and Septic System project, clarifying requirements and scope.

• Septic Tank: Two 1500-gallon tanks in series are acceptable, or a single 3000-gallon cast-in-place tank if a precast supplier cannot be found.
• Acoustic Ceiling Tiles (ACT): ACT must be removed for work and replaced; this is expected to be part of the contractor's scope.
• Existing Cables: Contractors should exercise caution around existing Ethernet and low-voltage cables. The park may assist in securing cables where practical, but the contractor is expected to work around them.
• Card Access System Cabling: It is expected that these cables will not need relocation. If relocation is necessary, the park will perform the work, to be coordinated at the pre-construction meeting.
• Blast Ratings: Pump motors require explosion-proof certification (Class 1 Division 1) per specification 333213, 2.3.B.2.e. No other blast rating requirements are noted.
• Asbestos/Lead Paint: Asbestos and Lead Based Paint (LBP) are highly unlikely given the Visitor Center's construction in 1995.
• Commissioning: Commissioning is not included in the SOW, but O&M requirements must be fulfilled.
• Procore Software: Utilization of Procore for submittals, RFIs, and project management is a possibility to be determined during the pre-construction meeting.
• RFI/Submittal Response Time: RFIs are normally responded to within 7 business days. Submittals will be answered within 15 days.
• Staging Area: A staging area will be defined during the pre-construction meeting and is also shown on plan sheet C4.
• Archeological Items: The project area has been cleared by MWAC and Section 106 processes. Contractors must strictly adhere to construction/disturbance limits.
• Pricing Schedule: No separate price schedule is required; the total lump sum amount should be entered in block 17.

These clarifications may affect how bidders plan for site work, material procurement, and project management. Specifics regarding cable management, ACT replacement, and software usage will be finalized at the pre-construction meeting.

Amendment / Modification

• Updates Section L, "Required Submissions" on page 74 of the SF1442.

• Removes the experience questionnaire.

• Adds a requirement for a bid bond of 20%.

• Adds a requirement for a completed "Limitation of Subcontracting" attachment (Attachment 3).

• Updated information is highlighted in yellow within the document.

• Section L, "Required Submissions" (Page 74 of SF1442)

• Attachment 3, "Limitation of Subcontracting"

• Proposal submission requirements have been modified to include a bid bond and the Limitation of Subcontracting attachment.

• The deadline for proposal submission has not been changed by this amendment.

• For questions regarding this amendment, contact Joseph Kirk at joseph_kirk@ios.doi.gov or 605.574.0510.

Solicitation

This document is an Invitation for Bids (IFB) for construction services, issued on Standard Form (SF) 1442. Bidders are required to represent their status as a construction contractor and, upon request, provide detailed information on experience, organization, qualifications, financial resources, and facilities. The government will not be responsible for costs incurred by offerors in preparing or submitting bids.

• Bidders must complete Blocks 14-20 of the SF 1442, including their SAM registered UEI number in Block 14.

• A lump sum (total) bid price must be indicated in Block 17. A detailed breakdown may be requested.

• Original signatures authorized to sign for the company are required.

• A completed Limitations on Subcontracting worksheet must be submitted with the bid.

• All solicitation amendments must be acknowledged.

• A Bid Guarantee must be provided.

• Specifications and drawings are attached and incorporated by reference. Bidders must replace "substantial completion" with "final completion" throughout the specification document.

• Work must be completed by skilled personnel per industry standards and manufacturer specifications.

• The contract duration is 120 calendar days after receipt of Notice to Proceed.

• The contract type is Firm Fixed Price.

• Performance bonds and payment bonds are required, each for 100% of the original contract price.

• Bids must be submitted via email to joseph_kirk@ios.doi.gov.

• The total size limit for email attachments is 100MB.

• Bids must be submitted by the date and time noted in Block 13a of the SF 1442.

• Late bids will not be accepted.

• Questions regarding the solicitation must be submitted in writing via email no later than 5 calendar days following the organized site visit.

• Bids will be evaluated without discussions, and award will be made to the responsible bidder whose bid is most advantageous to the Government, considering only price and specified price-related factors.

• The solicitation is open to Indian Economic Enterprises that are also small business concerns, as per DIAR 1452.280-2 and 1452.280-1.

• Offerors must provide written assurance of their eligibility and compliance.

• A site visit is scheduled for May 26, 2026, at 9:00 AM Mountain Time.

• Meeting location: Knife River Indian Villages NHS Visitor Center, 564 County Road 37, Stanton, ND 58571.

• Site visit information is subject to change; monitor SAM.gov for amendments.

• Clauses 52.236-2 (Differing Site Conditions) and 52.236-3 (Site Investigations) will be included in the contract, urging bidders to inspect the site.

• Contact Specialist Joseph Kirk at joseph_kirk@ios.doi.gov or 605.574.0510 for contractual issues.

Form / Attachment / Pricing Sheet

This document provides absorption field size calculations for the Knife River Visitor Center - Sewer and Septic Replacement project.

• Design Flow: 640 gal
• Absorption field loading: 1.27 sf/gpd (based on P-4 Ave perc test & WPPH OSTS CODE Guidance)
• Absorption field size: 812.8 sf
• Trench width: 3 ft
• Lateral length needed: 270.9333 ft
• Max lateral length: 110 ft
• Lateral length Used: 70 ft
• Absorption field width: 48 ft (4 laterals needed)

This information is crucial for bidders to understand the scale and technical requirements related to the septic system design, which may impact material selection, installation methods, and overall project cost.

Form / Attachment / Pricing Sheet

This document provides a summary of percolation testing conducted for the KNRI Sewer and Septic Improvements project in Stanton, North Dakota. It details the results of tests performed at four different locations (P-1, P-2, P-3, P-4) to assess soil permeability.

• Percolation Test Results: Includes elapsed time, water drop, and calculated percolation rate (min/in) for multiple intervals at each test location. Stabilized percolation rates are provided.
• Soil Profile Summary: Describes the visual classification of soil layers (e.g., SILTY SAND with vegetation, trace gravel) and their depths (in feet) for each test location.
• Water Depth: Indicates whether water was encountered during testing at each location.
• Boring Location Map: A map (Figure 2) illustrating the geographical placement of the percolation test sites (P-1 to P-4) and soil boring locations (B-1, B-2) relative to the project area.

This information is crucial for bidders to understand the subsurface soil conditions and drainage characteristics of the project site. It directly impacts the design and feasibility of sewer and septic systems, influencing material selection, excavation methods, and system performance. Bidders should review these results to assess potential challenges and inform their technical proposals and cost estimates.

Form / Attachment / Pricing Sheet

This document outlines the Closeout and Operation & Maintenance Requirements for the project. It serves as a checklist for deliverables and documentation required from the contractor upon project completion.

• Project Record Drawings: Submission of as-built drawings.
• System Demonstration and Training: Requirements for electrical system and lift station demonstration and training.
• Tools, Spare Parts, Equipment: Provision of one spare grinder pump, four septic tank filters, and spare electrical components (capacitors, relays, fuses, circuit breakers).
• Reports: Submission of HDPE Hydrostatic Test Results.
• Keys and Keying Schedule: Requirements for keys and their associated schedule.
• Environmental Record Documents: Final summary of solid waste disposal and diversion.
• O&M Data, Warranties, Guarantees: Submission of environmental record documents, various warranties (1-year on work items, 1-year on electrical work, 2-year on specific items), Operation and Maintenance Manuals, Product Maintenance Manuals, and Operation & Maintenance Data.

This document is crucial for bidders to understand the specific closeout documentation, training, spare parts, and maintenance information that will be required upon contract award. It details the deliverables needed to finalize the project and ensure operational readiness.

Form / Attachment / Pricing Sheet

This document is a "Submittal List" for the KNRI - PMIS 345002: VC SANITARY SEWER PLUMBING AND SEPTIC SYSTEM project. It outlines the specific submittals required from contractors for various sections of the work, categorized by "Informational" and "Action" requirements.

The list details submittals such as:

• Shop Drawings
• Product Technical Data
• Manufacturer's Data & Instructions
• Certifications
• Test Quality
• Quality Control Plans
• Safety Plans
• Schedules
• Qualifications Statements
• Demolition Plans
• Concrete Mix Designs
• Fusion Machines proposed for joining pipe/fittings
• Photo Documentation

Each item is linked to a specific Specification Section/Drawing Plan Sheet Number and Paragraph Number. The "Requirements" columns indicate the type of submittal needed (e.g., Cert./Lab Test, Shop Drawing, Mfg. Data).

This list is crucial for bidders to understand the documentation and information they are required to provide as part of their contractual obligations. It helps in planning proposal content and ensuring compliance with project requirements for submittals throughout the project lifecycle.

Solicitation / RFP / RFQ

This solicitation is for the replacement of all exterior sanitary plumbing infrastructure associated with the Knife River Indian Villages NHS Visitor Center, including new interior sewer piping, a reworked exterior lift station & valve vault, and a new exterior septic system. The project aims to address ongoing issues with the existing system that cause backups and damage.

• Replacement and construction of new interior sewer piping.

• Reworked exterior lift station & valve vault with new interior & electrical components.

• New exterior septic system including septic tank(s), cleanouts, distribution box, and absorption trenches.

• Work impacting the existing system shall be completed after Labor Day.

• Contract Type: Firm Fixed Price Construction Contract.

• Period of Performance: 120 calendar days after Notice to Proceed.

• Magnitude: Between $500,000 and $1,000,000.

• Proposal Submission: Bids must be submitted via email to joseph_kirk@ios.doi.gov.

• Bid Due Date: June 23, 2026, at 1:00 PM Mountain Time.

• Bid Opening: Virtual, via conference call (details provided in the solicitation).

• Questions: Must be submitted in writing via email to joseph_kirk@ios.doi.gov no later than 5 days after the site visit.

• Bid Guarantee: Required (20% of bid price, not to exceed $3M), submitted as a Standard Form 24 and emailed with the bid package.

• Payment and Performance Bonds: Required, 100% of final contract award amount.

• This project is set aside 100% for ISBEE (Indian Small Business Economic Enterprise).

• NAICS Code: 237110 (Water and Sewer Line and Related Structures Construction).

• Small Business Size Standard: $45 million.

• A site visit is highly encouraged on May 26, 2026, at 9:00 AM Mountain Time. RSVP to joseph_kirk@ios.doi.gov.

• Offerors must be registered in the System for Award Management (SAM) and have current online Representations and Certifications.

• Wage rate determinations (Construction) are incorporated as attachments.

• Specifications and drawings are available on http://www.sam.gov.

Form / Attachment / Pricing Sheet

This document is a "Report of Geotechnical Exploration" prepared by American Engineering Testing (AET) for the KNRI Sewer and Septic Improvements project in Stanton, North Dakota. It details the findings of subsurface exploration and laboratory testing to assist in the planning, design, and construction of the project.

• Project Overview: Construction of a lift station and associated manholes and drain field at the Knife River Indian Villages historical site.
• Scope of Services: Included two SPT borings to 15 feet, four percolation tests, soil laboratory testing, and a geotechnical engineering review.
• Site Conditions: Described surface observations, subsurface soils (topsoil/fill, coarse alluvium, glacial till), and noted no groundwater encountered during exploration.
• Recommendations: Provided guidance on subgrade preparation, foundation design (net maximum allowable bearing capacity of 2,000 psf, estimated total settlement < 1 inch), lateral earth pressures, trench excavation, utility subgrade preparation, backfill considerations, and percolation test results (average rate of 6.7 minutes per inch).
• Materials and Compaction: Specified requirements for General Structural Fill and Utility Trench Backfill, including minimum compaction requirements and moisture content.
• Testing Frequencies: Recommended frequencies for compaction tests and suggested AET be retained for earthwork observations and testing.
• Construction Considerations: Addressed potential difficulties such as runoff water in excavations and soil disturbance, and provided information on soil chemistry and seismic classification.
• Appendices: Included detailed information on field exploration, sampling methods, classification systems, boring logs, percolation test results, Proctor test reports, and limitations of the report.

This report provides critical geotechnical data essential for bidders to understand the subsurface conditions, soil properties, and recommended construction practices. This information will inform bidding strategies, material selection, excavation methods, foundation design, and overall project planning to ensure compliance with site-specific geotechnical requirements.

Solicitation

This document outlines the project specifications for the replacement of the Visitor Center's sanitary sewer plumbing and septic system at Knife River Indian Villages National Historic Site. The existing system, installed in 1992, has experienced recurring issues with solids evacuation, leading to backups and system obstructions. The project aims to replace the entire exterior and interior sanitary system, including the lift station, valve vault, septic tanks, dosing siphon, and filter field.

• Replacement and construction of new interior sewer piping below both floors of the building.

• Reworked exterior lift station and valve vault with new interior and electrical components.

• New exterior septic system including septic tank(s), cleanouts, distribution box, and absorption trenches.

• Removal and disposal of existing system components, including exposed plumbing, associated pipe supports, lift station, septic tanks, dosing siphon, filter field, and all applicable electrical components.

• Contractor must coordinate with park staff to minimize disruptions and submit a contractor staging and access plan, considering the site's archaeological sensitivity.

• The project will be performed under a single contract.

• Period of performance: 120 calendar days from the Notice to Proceed.

• Work impacting the existing system must be completed after Labor Day.

• Not explicitly detailed in this document, but general requirements for submittals, shop drawings, and product data are outlined in other sections.

• Not specified in this document.

• The project is located at Knife River Indian Villages NHS Visitor Center, 564 County Road 37, Stanton, ND 58571.

• The document includes detailed specifications for various aspects of the work, including demolition, openings and penetrations, electrical systems, earthwork, exterior improvements, utilities, process interconnections, identification devices, grounding and bonding, raceways and boxes, underground work, site clearing, finish grading, trenching and backfilling, seeding/sodding/landscaping, polyethylene pipe, concrete manholes, concrete vaults and chambers, package sewage pumping stations, process piping, pipe support systems, and gate/check valves.

• Special attention must be paid to the preservation of historical and archeological fabric, as well as existing utilities.

• The structure(s) involved in this project are not historic.

Other / Unclassified

This document is a General Decision Number (ND20260024) issued by the Department of Labor, effective January 30, 2026. It specifies prevailing wage rates and fringe benefits for various construction trades within Mercer County, North Dakota, for building construction projects (excluding single-family homes and apartments up to four stories).

This document is crucial for any bidder responding to a solicitation that requires adherence to Davis-Bacon Act prevailing wage rates for building construction in Mercer County, North Dakota. It details the minimum hourly wage and fringe benefit rates for specific job classifications, including:

• Boilermaker
• Bricklayer
• Electrician (Including Low Voltage Wiring)
• Power Equipment Operator (Roller)
• Ironworker (Reinforcing and Structural)
• Laborer (Carpenter Tender, Common or General)
• Cement Mason/Concrete Finisher
• Plumber
• Pipefitter
• Sheet Metal Worker (HVAC Duct Installation Only)
• Carpenter
• Form Worker
• Insulator - Mechanical (Duct, Pipe & Mechanical System Insulation)
• Various Equipment Operators (Backhoe/Excavator/Trackhoe, Bobcat/Skid Steer/Skid Loader, Crane, Forklift, Loader)
• Painter (Brush and Roller)
• Truck Driver (Dump Truck)

It also references Executive Orders (EO) 13706 (Paid Sick Leave) and 13658 (Federal Contractor Minimum Wage), outlining contractor obligations related to these orders. Information on the wage determination appeals process is also provided.

Forms / Attachments / Pricing Sheets

This document contains construction drawings for the "Replacement of Visitor Center Sanitary Sewer Plumbing and Septic System" at Knife River Indian Villages National Historic Site. It provides detailed plans, legends, symbols, and specifications for the civil, plumbing, and electrical aspects of the project.

• Civil Drawings (Sheets C1-C14): Topographic surveys, site demolition plans, erosion control layouts, site layouts, sanitary sewer plans and profiles, and various civil details.
• Plumbing Drawings (Sheets P0-P3): Plumbing symbols and abbreviations, first-floor waste and vent demolition and new plans, and plumbing diagrams.
• Electrical Drawings (Sheets E1-E4): Electrical symbols, site layout, details, and a one-line diagram with a panel schedule.
• Legends and Abbreviations: Detailed explanations of symbols and terms used throughout the drawings.

These drawings are critical for bidders to understand the full scope of work, including site conditions, demolition requirements, new construction details for the sanitary sewer system, and electrical system modifications. Bidders must use these drawings to accurately estimate costs, plan construction methods, and ensure compliance with all specified requirements.

Form / Attachment / Pricing Sheet

This document is a template for reporting on Limitations on Subcontracting (LOS) for contracts, specifically for HUBZONE set-asides and general construction services. It provides a structured format for prime contractors to report on amounts paid to 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 (e.g., HUBZONE), and Total Contract Value.
• Performance Period: Dates for which the report is being submitted.
• Type of Service: Specifies the nature of the contract (e.g., General construction).
• Payment Tracking: Sections to detail amounts paid to SSS and NSS, including placeholders for individual subcontractor names.
• Limitation on Subcontracting Calculation: A formula is provided to calculate the LOS percentage: (Total Amount Paid to the Prime - Total Amount Paid to NSS) / Total Amount Paid to the Prime.

This template highlights the government's requirement for tracking and reporting on subcontracting limitations, particularly for HUBZONE set-asides. Bidders should understand that compliance with subcontracting goals will be a key aspect of contract performance. The template indicates the type of data that will need to be collected and reported throughout the contract lifecycle.

Solicitation / RFP / RFQ

This is a pre-solicitation notice for construction services to replace the septic system at the Knife River Historic Indian Village in Stanton, North Dakota. The National Park Service Contracting Operations (ConOps) Central will issue an Invitation for Bids (IFB) using a sealed bid process.

• Replacement of all exterior sanitary plumbing infrastructure for the Visitor Center building.

• Replacement of select indoor plumbing piping.

• Construction of new interior sewer piping below both floors.

• Reworking of the exterior lift station & valve vault with new components.

• Installation of a new exterior septic system, including tank(s), cleanouts, distribution box, and absorption trenches.

• The existing system, installed in 1992, has experienced issues with solids evacuation, leading to backups and damage, particularly in sensitive areas like the Museum Collection.

• Contract Type: Firm-fixed price.

• Period of Performance: 120 calendar days from the Notice to Proceed. Work impacting the existing system must be completed after Labor Day.

• Estimated Value: Between $500,000 and $1,000,000.

• Wage Requirements: Construction Wage Rate Requirements for Pennington County will apply.

• The formal solicitation with construction specifications is anticipated on or about May 15, 2026.

• Responses will be due approximately 30 days after the IFB issue date.

• The anticipated close date is June 22, 2026 (specific date and time to be announced in the solicitation).

• Hardcopies or emailed copies of the solicitation will not be provided.

• NAICS Code: 237110 (Water and Sewer Line and Related Structures Construction).

• Small Business Size Standard: $45 million.

• Set-Aside: 100% ISBEE (Indian Small Business Economic Enterprise).

• Registrations Required: Offerors must have a UEI number, be registered and active in SAM.gov, and have completed Online Representations and Certifications by the solicitation close date.

• A site visit information will be provided when the solicitation is posted.

• This is a preliminary notice; a formal solicitation will follow.

• Joseph Kirk, Contracting Officer

• joseph_kirk@ios.doi.gov

• 605.574.0510

Sources Sought (Market Survey)

The National Park Service (NPS) is conducting a market survey to gauge vendor interest and capability for a potential upcoming project to replace sanitary plumbing infrastructure at the Knife River Historic Indian Village in Stanton, North Dakota. This is not a solicitation, and responses do not commit the government to any future action.

The project involves replacing all exterior sanitary plumbing associated with the Visitor Center building and select interior piping. This includes new interior sewer piping, a reworked exterior lift station with new components, and a new exterior septic system (septic tank, distribution box, absorption trenches, etc.). The existing system, installed in 1992, has experienced failures leading to backups and damage, particularly due to undersized and improperly sloped interior pipes. These failures have caused public health and safety concerns.

• Work Location: Knife River Indian Villages NHS Visitor Center, 564 County Road 37, Stanton, ND 58571.

• Project Period: 120 calendar days from Notice to Proceed. Work impacting the existing system must be completed after Labor Day.

• Estimated Magnitude: Between $500,000 and $1,000,000.

• NAICS Code: 237110 (Water and Sewer Line and Related Structures Construction).

• Small Business Size Standard: $45 million.

• Firm Name, Address, Phone Number, Email Address

• UEI Number

• Bonding Capability

• Size status/SBA certifications (Small Business, WOSB, HUBZone, SDVOSB, 8(a), ISBEE, Other Than Small)

• Description of work to be performed by firm's employees (without subcontracting)

• Capability statement (summary of capabilities)

• Deadline: Not later than 12:00 PM MT, April 29, 2026.

• Submission Method: Email to joseph_kirk@nps.gov.

• Subject Line: Include reference number 140P6326B0006.

All costs for responding are the responsibility of the firm. Information submitted is voluntary. Future solicitations will be posted on SAM.gov.