SUF FR912 Little Isabella River Culvert Replacement

Statement of Work (SOW)

This SOW details the replacement of existing triple 72" wide x 48" high x 32’-0” long corrugated metal pipe arch culverts on low volume Forest Road 912 at the Little Isabella River crossing. The project aims to replace these aging culverts, which are currently spanned by timber bridging due to integrity concerns.

• Removal of existing timber panel bridging and culverts.

• Furnishing and installation of new precast concrete culverts (two 24’-0” long x 12’-0” wide x 5’-0” high, side-by-side).

• Furnishing and installation of precast concrete headwalls and wing walls.

• Furnishing and installation of rip rap, backfill, and geotextile drainage material.

• Furnishing and placement of aggregate to final road grade.

• Installation of permanent bridge signs.

• Seeding and mulching of all disturbed areas.

• Traffic control monitoring and implementation.

• Protection of the Little Isabella River and associated wetlands from siltation.

• The project is intended to be completed before the end of the FY 2026 construction season.

• Critical Restriction: All in-stream work must be performed between June 30th and September 15th due to the Little Isabella River being a designated trout stream.

• Location: Forest Road 912 at MP 0.101, Little Isabella River.

• Materials & Workmanship: Must conform to FHWA Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP-14, and project supplemental specifications.

• Design Standards: Culverts must be designed to AASHTO LRFD Bridge Design Specifications (9th ed., 2020), AASHTO Guidelines for Geometric Design of Low-Volume Roads (2nd ed., 2019), and FSH 7709.56b.

• Load Rating: Structure must be designed for HL93 vehicles, accommodating Minnesota Statute 169.826 and 169.8261, with an operating load rating for all Minnesota standard permit vehicles >= 1.0.

• Submittals: Contractor must submit project schedules, material lists, drawings, and design documentation for COR review and approval prior to fabrication and proceeding with work.

• Traffic Control: Must be established before commencing culvert work.

• Environmental Protection: Strict measures required to protect the river and wetlands from construction impacts.

• Personnel: Contractor shall assign experienced personnel, particularly with precast concrete construction.

• Government Furnished: No materials or supplies will be government-furnished. COR approval is required for all materials, supplies, and design drawings.

• Deliverables: Key deliverables include a Proposed Project Plan, Revised Project Schedule, Vendor material list and drawings, Construction Daily Reports, and Monthly Status Reports.

• No Security Requirements.

• Section 508: Requirements apply to project communications and documents, but not IT supply.

Solicitation / RFP / RFQ

This solicitation is for culvert replacement construction services on the Tofte Ranger District, Superior National Forest. The project involves removing existing timber panel bridging and culverts, and installing new precast concrete culverts, head walls, and wing walls.

• Removal of timber panel bridging.

• Demolition and removal of existing culverts.

• Furnishing and installation of new precast concrete culverts.

• Furnishing and installation of new head walls and wing walls.

• Project Magnitude: Estimated between $500,000 and $1,000,000.

• Contract Type: Firm Fixed Price Purchase Order anticipated.

• Period of Performance: 424 days after receipt of Notice to Proceed (NTP).

• Quotes are due electronically via email by 1700 CDT on 07/06/2026.

• Quotes will be evaluated based on Price (reasonableness in accordance with RFO 12.204(a)).

• Award will be made to the responsive, responsible vendor with the lowest price.

• A Bid Guarantee is required.

• Set Aside: Total Small Business.

• Wage Determination: DBAWD MN20260231.

• A formal site visit will not be held; offerors are urged to inspect the site.

• Questions are due via email by 1300 CDT on 06/24/2026.

• The solicitation incorporates numerous FAR clauses and provisions, including those related to construction, labor standards, and payment terms.

Form / Attachment / Pricing Sheet

This document contains the engineering plans and drawings for the FR 912-0.101 Over Little Isabella River Culvert Replacement project.

• Title Sheet (G-01): Provides project overview, location, and index of sheets.
• Quantities, Design Data, & General Notes (C-02): Details design parameters, hydraulic data, general construction notes, and a summary of project quantities.
• Temporary Traffic Control Plan (C-03): Outlines the plan for managing traffic during construction, including road closures and detours.
• Dewatering Plan (C-04): Details the methods for managing water during construction, including coffer dams and pumping.
• Typical Sections (C-05): Illustrates existing and proposed typical road and culvert cross-sections.
• Plan of Site (C-06): Shows the overall site layout, including proposed improvements, erosion control measures, and reference points.
• Profile of Site (C-07): Depicts the vertical alignment of the road and existing/proposed structures.
• Culvert Plan (C-08): Provides a top-down view of the proposed culvert, including dimensions and surrounding features.
• Culvert Details (C-09, C-10): Offers detailed drawings of the precast concrete box culvert, wingwalls, headwalls, and joint details.
• Soil Borings (C-11): Presents the results of soil investigations at various locations on the project site.
• Cross Sections (C-12, C-13): Shows detailed cross-sections of the roadway at different stations along the project.

These plans are critical for bidders to understand the scope of work, the specific design of the proposed culvert replacement, site conditions, traffic management requirements, and all associated construction details. They form the basis for estimating costs and developing a construction plan.

Form / Attachment / Pricing Sheet

This document is a map displaying a route with estimated travel time and distance. It appears to be an attachment related to a larger opportunity, potentially illustrating a service area or delivery route.

• The map shows a route from an unspecified starting point (indicated by a red pin near Isabella, MN) to Silver Bay, MN.
• The route covers approximately 31.6 miles and is estimated to take 38 minutes of driving time.
• Key locations and towns along the route include Isabella, Baptism Crossing, Murppy City, Finland, and Silver Bay.
• The map also indicates nearby state parks and forests, such as Finland State Forest and George H. Crosby Manitou State Park.

This map provides visual context for the geographical scope of the opportunity. Bidders can use this information to understand the travel requirements, distances, and potential logistical considerations associated with the service area, particularly if the opportunity involves transportation, delivery, or services within this region.

Form / Attachment / Pricing Sheet

This document, "FOREST SERVICE SUPPLEMENTAL SPECIFICATIONS (FSSS) TO THE STANDARD SPECIFICATIONS FOR CONSTRUCTION OF ROADS AND BRIDGES ON FEDERAL HIGHWAY PROJECTS FP-14", provides modifications and additions to the standard specifications for road and bridge construction projects within the Superior National Forest. It details specific requirements, deletions, and additions to various sections of the standard specifications.

• Preface: Adopts FP-14 for National Forest System Roads construction.
• Terms, Format, and Definitions (Section 101): Updates abbreviations and definitions, including "Road Order" and "Protected Streamcourse."
• Scope of Work (Section 103): Deletes several subsections.
• Control of Work (Section 104): Adds a subsection on "Use of Roads by Contractor."
• Control of Material (Section 105): Specifies government-provided sources for aggregate and outlines requirements for contractor-located sources, including weed-free material.
• Acceptance of Work (Section 106): Replaces subsections on conformity with contract requirements and visual inspection.
• Legal Relations and Responsibility to the Public (Section 107): Adds requirements for protection and restoration of property and landscape, including restrictions on working near streams and dwellings.
• Prosecution and Progress (Section 108): Deletes the entire section.
• Measurement and Payment (Section 109): Deletes several subsections and modifies the decimal accuracy for final payment.
• Construction Survey and Staking (Section 152): Updates material requirements for stakes and flagging, and replaces methods for slope and reference stakes.
• Contractor Quality Control (Section 153): Replaces qualifications for quality control managers and testers, and updates records and control charts requirements.
• Public Traffic (Section 156): Replaces the entire section with new requirements for controlling and protecting public traffic, including temporary road closures and traffic control plans.
• Soil Erosion and Sediment Control (Section 157): Replaces general requirements for erosion and sediment control plans and adds details on in-stream excavation sequencing.
• Clearing and Grubbing (Section 201): Adds requirements for vegetation cutting limits and replaces stump height and utilization standards for timber.
• Removal of Structures and Obstructions (Section 203): Adds various methods for disposing of construction slash.
• Excavation and Embankment (Section 204): Replaces the entire section with detailed requirements for excavation, embankment construction, compaction methods, and material specifications. Includes extensive tables for construction tolerances and sampling/testing requirements.
• Rock Blasting (Section 205): Adds regulations for Forest Service lands, preblast condition surveys, test blasting, and conditions for halting blasting.
• Structure Excavation and Backfill (Section 208 & 209): Adds dewatering requirements and updates backfill and compacting methods for structures and pipe culverts.
• Subgrade Stabilization (Section 213): Replaces general requirements for subgrade preparation.
• Untreated Aggregate Courses (Section 301): Replaces compacting methods for aggregate courses.
• Minor Crushed Aggregate (Section 302): Updates compacting and finishing requirements for roadway aggregate.
• Stockpiled Aggregates (Section 314): Adds description and stockpile site requirements.
• Foundation Gravel Pad, 1" Minus (Section 315): Details material requirements for geotextile and gravel, and construction requirements for the foundation pad.
• Structural Concrete (Section 552): Replaces description, material references, construction requirements (including concrete composition tables), delivery, and precast element specifications. Updates requirements for quality assurance, submittals, and installation tolerances.
• Turf Establishment (Section 625): Replaces the entire section with detailed requirements for soil preparation, seeding methods, mulch application, and protection of seeded areas.
• Permanent Traffic Control (Section 633): Updates material and general requirements for permanent traffic control devices.
• Flexible Baffle (Option #1) (Section 647): Details fabrication and installation of flexible baffles within culverts.
• Aggregate (Section 703): Replaces specifications for surface course aggregate, subbase, base, and screened aggregate. Includes updated tables for gradation requirements.
• Soil (Section 704): Replaces bedding material requirements and updates select granular backfill specifications and tables.
• Joint Material (Section 712): Adds requirements for hot poured rubber joint sealant.
• Miscellaneous Material (Section 725): Replaces pozzolan specifications and adds bentonite requirements.

This document is critical for any bidder responding to the "LITTLE ISABELLA RIVER CULVERT REPLACEMENT" opportunity. It supersedes and modifies the standard specifications for road and bridge construction, providing the definitive technical requirements for the project. Bidders must thoroughly review these supplemental specifications to understand all changes, additions, and deletions to the base contract requirements, as these will directly impact project execution, material selection, quality control, safety, and ultimately, the bid price. Key areas of focus include updated requirements for excavation, embankment, concrete, traffic control, erosion control, and material testing. Failure to account for these modifications could lead to non-compliance and bid inaccuracies.

Other / Unclassified

This document is a General Decision Number (GDN) for prevailing wages in Minnesota, specifically for Heavy and Highway Construction in the counties of Carlton, Cook, Itasca, Koochiching, Lake, Pine, and St. Louis. It lists various labor classifications, their corresponding hourly rates, and fringe benefits. The document includes two modification dates: 01/02/2026 and 05/18/2026, with the latter being the most recent publication date.

This document is crucial for bidders on construction projects in the specified region of Minnesota. It establishes the minimum wage rates and fringe benefits that must be paid to laborers and mechanics employed on the project, as required by federal regulations (such as the Davis-Bacon Act). Bidders must use these rates when calculating their labor costs and preparing their proposals to ensure compliance with federal labor laws. The document also provides information on how to appeal wage determinations and details on Executive Orders related to paid sick leave and minimum wage for federal contractors.

Form / Attachment / Pricing Sheet

This document is a fillable Schedule of Items (SOI) for the SUF FR912 Little Isabella River Culvert Replacement project. Vendors are instructed to carefully read its contents before preparing a quote.

• Project: SUF FR912 Little Isabella River Culvert Replacement, Superior National Forest.
• Items: Details specific components required for the culvert replacement, including:
  • Mobilization
  • Construction Survey and Staking
  • Silt Sock
  • Turbidity Curtain
  • Clearing and Grubbing
  • Removal of Pipe Culverts
  • Roadway Excavation and Embankment
  • Structure Excavation and Backfill
  • Dewatering
  • Riprap and Geotextile
  • Aggregate Base and Foundation Gravel
  • Precast Concrete Box Culvert (12-Foot Span By 5-Foot Rise)
  • Underdrain System
  • Topsoil and Seeding
  • Erosion Control Products
  • Wood Posts and Object Markers
  • Temporary Traffic Control
• Option 1: Flexible Baffle (64701).
• Units: Various units are used, including Lump Sum (LSQ), Linear Foot (LF), Cubic Yard (CY), Square Yard (SY), and Each (EA).
• Pricing: Vendors must provide unit prices and line item totals. The document notes that some values are auto-calculated, but the vendor is responsible for verifying all pricing.

This SOI is critical for bidders as it outlines the specific materials, quantities, and tasks required for the project. Vendors must complete this form with their pricing for all items, including the option, to submit a responsive quote. It also provides important notes regarding specifications, incidental items, and the responsibility for pricing accuracy.