Z--DK Heart Butte Dam Safety Modification

Amendment / Modification

This document, Amendment 0002, modifies solicitation 140R6026R0004, effective April 13, 2026.

• Item 00010 (Supplies/Services) has been modified.

• The Period of Performance has been updated to 12/31/2026 to 06/30/2030.

• The description for Item 00010 has been changed to "Heart Butte Dam, Safety of Dams Modification".

• The Product/Service Code remains Z2PZ.

• The Product/Service Description is now "REPAIR OR ALTERATION OF OTHER NON-BUILDING FACILITIES".

• The solicitation's receipt date for offers is extended to April 13, 2026.

• Offerors must acknowledge receipt of this amendment.

Other / Unclassified

This document is a memorandum transmitting Technical Memorandum (TM) No. 8550-2020-06, titled "Geotechnical Laboratory Testing Results for Heart Butte Dam Conduit Floor, Foundation, Borrow, and Rock Material." The TM details the results of a geotechnical laboratory testing program conducted to evaluate samples obtained from beneath the conduit floor, embankment and foundation materials, and borrow materials at Heart Butte Dam. The testing was performed to support the final design of preferred alternatives for the outlet works conduit.

This document provides detailed geotechnical data for the Heart Butte Dam project. While not a solicitation, it offers critical information about the subsurface conditions and material properties at the dam site. This data is essential for any potential bidder involved in future construction, repair, or modification work at Heart Butte Dam, as it informs design considerations, material suitability, and potential construction challenges related to soil and rock mechanics.

Solicitation / RFP / RFQ

This solicitation is for the Heart Butte Dam Safety of Dams Modification project, located approximately 80 miles west of Bismarck, North Dakota. The project involves extensive civil, geotechnical, and structural construction to improve the dam's safety, stability, and performance.

• Installation and removal of temporary electrical utility infrastructure.

• Site preparation: clearing, grubbing, stripping, and abandonment/removal of existing monitoring points.

• Dewatering and unwatering systems for excavation, embankment, filter construction, and grouting.

• Design and construction of a soil reinforcement zone and a mechanically stabilized earth (MSE) wall.

• Jet grouting for cutoff walls and treatment zones, including test sections.

• Demolition and repair of the spillway/outlet works conduit floor and walls.

• Backfill grouting of voids beneath the conduit.

• Drilling and chemical grouting of conduit joints and cracks.

• Excavation of embankment, foundation, and discharge channel.

• Installation of new sand filter layers, sand and gravel drain seepage blanket, and toe drain inspection wells.

• Furnishing and installation of high-density polyethylene (HDPE) toe drain pipes and cleanouts.

• Excavation, screening, and delivery of borrow material for embankment stability berm fill.

• Placement of riprap bedding, riprap, and rockfill slope protection.

• Construction of new embankment measurement points and piezometers.

• Restoration of disturbed ground and access roads.

• Installation of a roll-up door on the spillway/outlet works conduit headwall.

• Removal, design, and construction of a new fishing platform, access ramp, and sidewalks.

• Contract Type: Firm Fixed Price

• Estimated Magnitude of Project: More than $10,000,000

• Period of Performance: Anticipated December 31, 2026, to April 30, 2030.

• Proposals are due by May 29, 2026, at 17:00 local time and will be publicly opened.

• Offers must provide at least 180 calendar days for Government acceptance.

• Proposals must be submitted electronically via Kiteworks.

• Evaluation Factors: Technical Plan for Construction (most important), Project Management/Quality Control/Safety Plans, Experience, Past Performance, Small Business Participation, and Price.

• The government may award to other than the lowest cost proposal based on technical benefits.

• NAICS Code: 237990 Other Heavy and Civil Engineering Construction

• Small business size standard: $45 million

• A site visit is scheduled for April 28, 2026, at 9:00 AM Mountain Standard Time. Safety gear (boots, hard hats, vests) is required.

• Contractors must register in SAM.gov.

• Payment requests via the Invoice Processing Platform (IPP).

• Questions deadline: May 6, 2026, by 5:00 p.m. MT.

Other / Unclassified

This document is a memorandum from Blake Armstrong (Concrete, Geotechnical, and Structural Laboratory) to Jie Yu (Geotechnical Engineering) transmitting Technical Memorandum No. 8530-2018-54. This memo details the results of soil testing conducted on material from the Heart Butte Dam Conduit Material as part of the Pick-Sloan Missouri Basin Program.

Tests performed on the conduit material included:

• Water content
• Dry unit weight
• Physical properties
• Direct shear
• Reaction to HCl
• X-ray diffraction (XRD)

Tests performed on borrow material included physical properties and, for one sample, maximum dry unit weight and optimum water content.

This document provides detailed geotechnical data for materials related to the Heart Butte Dam. Bidders involved in projects requiring knowledge of soil properties, material composition, or geotechnical characteristics in this region may find this information relevant for understanding site conditions or material suitability. Specific findings include:

• Conduit Material: Classified as non-plastic SM (silty sand) to SP-SM (poorly graded sand with silt). Direct shear test results indicated an internal friction angle of 39.4° and cohesion of 292 pounds per square feet (psf). XRD analysis indicated mainly quartz and clays (smectite and illite).
• Borrow Material: Classified as SM (silty sand). Maximum dry unit weight and optimum water content for one test pit sample (TP-18-1) were 130.5 pounds per cubic foot (pcf) and 11.2%, respectively.

Other / Unclassified

This document comprises a "2024 Final Design Geologic Investigations" report and a "Field Exploration Request" (FER) for the Heart Butte Dam, North Dakota. The investigations, conducted from January to April 2024, focused on characterizing subsurface geologic conditions for final design modifications. This included identifying potential borrow materials and subsurface characterization of sandstone bedrock and alluvial material adjacent to the stilling basin.

This information is critical for bidders involved in potential future construction or modification projects at Heart Butte Dam. It provides essential geotechnical data, including:

• Geologic Unit Descriptions: Details on "Fill," "Zone 2," "Quaternary Alluvium (Qal)," and "Bullion Creek Formation (Tb)" with USCS classifications and depths.
• Test Pit and Borehole Data: Summaries of 15 test pits and 5 boreholes, detailing soil depths, USCS classifications, bedrock depths, and total depths.
• Laboratory Testing Results: Findings from physical properties, dispersion potential, compaction, permeability, and undrained strength tests.
• Groundwater Data: Information on encountered groundwater levels.
• Field Exploration Request (FER): Outlines the scope of work for additional subsurface characterization, including site staking, mobilization, test pits, drilling, reconnaissance for commercial sources, laboratory testing, surveys, and data transfer. The FER also details cost estimates ($706,464 total), key personnel, exploration requirements (sampling, logging), and planned laboratory analyses. A well profile water analysis for PW-21-2 is also specified.

This data informs bidders about subsurface conditions, material properties, potential challenges, and the extent of planned geotechnical investigations, aiding in the development of bidding strategies and technical proposals for dam modifications.

Form / Attachment / Pricing Sheet

This document is a "Material Test Report" detailing the results of various laboratory tests performed on soil samples collected from the Downstream Right Abutment Borrow Area for the Heart Butte Dam Final Design project. It provides physical properties, compaction characteristics, dispersion potential, undrained strength, and permeability data for the soil.

• Sample Identification: Details include sample ID, date sampled, source, material type (borrow soil), specification (USBR 5330), sampling method (5-Gallon Bucket), boring number, and depth.
• Particle Size Distribution: Graphical and numerical data on the distribution of particle sizes (cobbles, gravel, sand, fines).
• Atterberg Limits: Liquid Limit (LL), Plastic Limit (PL), and Plasticity Index (PI) results.
• Physical Properties: Includes USCS classification, fines content, gravel, sand, and clay percentages, and specific gravity.
• Compaction Test Results: Standard Proctor and vibratory hammer compaction data, including maximum dry unit weight and optimum water content.
• Dispersion Test Results: Crumb dispersion grades and classifications.
• Undrained Strength: Results from Ko-consolidated undrained triaxial compression (TRX) testing.
• Permeability: Flow pump permeability test results, including vertical hydraulic conductivity.

This report is crucial for bidders as it provides detailed geotechnical data on the potential borrow soil sources. Understanding the soil's properties (e.g., compaction, strength, permeability, and dispersion characteristics) is essential for bidders to assess the suitability of the material for use in construction, estimate handling and placement requirements, and ensure compliance with project specifications. The data will inform decisions regarding material procurement, construction methods, and potential risks associated with the soil's behavior.

Other / Unclassified

This document is a Technical Memorandum (TM) from the Bureau of Reclamation (USBR) detailing "Heart Butte Dam Geotechnical Laboratory Testing in Support of Final Design Modifications." It presents the results of physical properties testing on soil samples collected from drill holes DH-24-03 through -05. This testing was conducted to inform the design of proposed modifications at Heart Butte Dam, specifically related to reducing the risk of internal erosion.

This document provides detailed geotechnical data, including soil physical properties (gradation, Atterberg limits, water content, dry unit weight), undrained strength, and permeability. This information is crucial for understanding the subsurface conditions at the Heart Butte Dam, which would be relevant for any contractor involved in the final design and construction of modifications, such as the proposed jet grout cutoff wall, sand filter trench, and zoned seepage berm. The data supports the design of these components and informs stability assessments during construction.

Solicitation / RFP / RFQ

This solicitation is for the Heart Butte Dam Safety of Dams Modification project, located approximately 80 miles west of Bismarck, North Dakota. The project aims to enhance the long-term safety, stability, and performance of the dam infrastructure through comprehensive civil, geotechnical, and structural construction activities.

• Clearing, grubbing, and stripping of work and borrow areas.

• Abandoning and removing existing piezometers and seepage monitoring points.

• Installing and operating dewatering and unwatering systems.

• Design and construction of a soil reinforcement zone and jet grouting test sections/production.

• Conduit shoring system, demolition/repair of spillway/outlet works conduit, and backfill grouting.

• Drilling and installing chemical grout at existing joints and cracks.

• Excavating existing dam embankment, foundation, and discharge channel.

• Installing new sand filter layer, deep sand filter trench, filter sand and gravel drain seepage blanket, concrete toe drain inspection well, and HDPE toe drain pipes.

• Constructing new stability berm fill and mechanically stabilized earth (MSE) wall.

• Furnishing and installing flumes, weir boxes, riprap bedding, riprap, and rockfill slope protection.

• Constructing new embankment measurement points and piezometers.

• Restoring ground disturbance and gravel access roads.

• Furnishing and installing a roll-up door on the spillway/outlet works conduit headwall.

• Removal, design, and construction of a new fishing platform, access ramp, and sidewalks.

• Adherence to Reclamation Safety and Health Standards.

• Submission of Work Plan, Construction Schedule, Project Management/Quality Control Plan, and Safety Plan.

• Contract Type: Firm Fixed Price (FFP).

• Estimated Magnitude: More than $10,000,000.

• Period of Performance: December 31, 2026, to April 30, 2030.

• Completion Time: 1,216 days after notice to proceed.

• Liquidated Damages: $15,789.47 per calendar day, up to $1,500,000.00.

• Proposals must be submitted electronically via Kiteworks by May 29, 2026, at 1700 MDT.

• Site Visit: April 28, 2026, 9:00 AM Mountain Standard Time.

• Questions due by May 6, 2026.

• Point of Contact: Mitchell Frost, Contracting Officer, mitchell_frost@ios.doi.gov.

• Evaluation Factors: Technical Plan for Construction, Project Management/Quality Control/Safety Plans, Experience, Past Performance, Small Business Participation, and Price. Non-price factors are significantly more important than price.

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

• Small Business Size Standard: $45 million.

• Small Business Participation is an evaluation factor with specific subcontracting goals.

• Offerors must register in SAM.gov prior to submitting a proposal.

• Payment requests submitted electronically through the U.S. Department of Treasury's Invoice Processing Platform (IPP).

• Numerous FAR and agency-specific clauses apply.

Amendment / Modification

This document is Amendment 0001 to Solicitation 140R6026R0004. It extends the solicitation's effective date to April 13, 2026.

• Item 9A: Amendment of Solicitation Number is 140R6026R0004.
• Item 9B: Dated (See Item 11) is 04/13/2026.

This amendment extends the effective date of the solicitation. Bidders should acknowledge receipt of this amendment. Failure to do so may result in rejection of their offer. If a bidder wishes to change an offer already submitted, they must do so via letter or electronic communication referencing the solicitation and this amendment, and it must be received prior to the specified opening hour and date.

Solicitation / RFP / RFQ

This document is a Solicitation, Offer, and Award form (SF 1442) for a government procurement. It outlines the terms and conditions for a potential contract.

• The solicitation requires performance of the work described in the associated documents.

• Specifics of the work are detailed in Item 10 and the continuation sheets.

• The work involves "Heart Butte Dam, Safety of Dams Modification", Product/Service Code: Z2PZ, described as "REPAIR OR ALTERATION OF OTHER NON-BUILDING FACILITIES".

• The performance period is from 12/31/2026 to 04/30/2030.

• The completion period is within 1216 calendar days after receiving notice to proceed.

• Performance bonds and payment bonds are required.

• Sealed offers are due by 05/29/2026 at 1700 hours.

• Offers must be submitted to the address in Item 8.

• Offers providing less than 180 calendar days for Government acceptance will be rejected.

• Not explicitly stated in the provided pages, but the form is designed for sealed bids or negotiated procurements.

• The document is issued by the Bureau of Reclamation, Missouri Basin Regional Office.

• The solicitation number is 140R6026R0004.

• The point of contact for information is Mitchell Frost.

Solicitation / RFP / RFQ

This solicitation is for the Heart Butte Dam Safety of Dams Modification (HBDSDM) project, located west of Bismarck, North Dakota. The project aims to enhance the long-term safety, stability, and performance of the Heart Butte dam infrastructure through comprehensive civil, geotechnical, and structural construction activities.

• Clearing, grubbing, and stripping of work and borrow areas.

• Abandoning and removing existing piezometers and seepage monitoring points.

• Installing and operating dewatering and unwatering systems.

• Design and construction of a soil reinforcement zone and jet grouting test sections/production.

• Design and construction of a temporary conduit shoring system, demolition/repair of a spillway/outlet works conduit section, and backfill grouting of potential voids.

• Drilling and installing chemical grout at existing joints and cracks.

• Excavating existing dam embankment, foundation, and spillway/outlet works discharge channel.

• Furnishing and installing new sand filter layer, filter sand and gravel drain seepage blanket, cast-in-place concrete toe drain inspection well, and HDPE toe drain pipes.

• Constructing new stability berm fill and mechanically stabilized earth (MSE) walls.

• Furnishing and installing flumes and weir boxes.

• Restoration and revegetation of disturbed areas.

• Installation of an onsite video system for project monitoring.

• Comprehensive drawings are provided, covering general, civil, structural, metalwork, and informational aspects.

• Extensive geologic investigations data (1945-2024) is detailed.

• Contract Type: Firm Fixed Price (FFP).

• Estimated Magnitude: More than $10,000,000.

• Period of Performance: Anticipated from December 31, 2026, to April 30, 2030. Construction completion within 1,216 days after notice to proceed.

• Proposal Submission: Sealed bids due by May 29, 2026, at 1700 hours local time. Offers will be publicly opened at that time. Electronic submission via Kiteworks or email by May 22, 2026, 1700 MT is also specified, requiring Volume I (Business), Volume II (Technical), Volume III (Small Business Subcontracting - if applicable), and Volume IV (Price).

• Evaluation Factors: Proposals will be evaluated on Technical Plan for Construction (Work Plan Narrative, Construction Schedule), Project Management/Quality Control/Safety Plans, Experience, Past Performance, Small Business Participation, and Price. Technical factors are significantly more important than price.

• Point of Contact: Mitchell Frost, Contracting Officer (mitchell_frost@ios.doi.gov).

• Site Visit: Scheduled for April 28, 2026, at 12:00 PM MST. Safety boots, hard hats, and vests are required.

• NAICS Code: 237990 - Other Heavy and Civil Engineering Construction, with a small business size standard of $45 million.

• Provisions for Small Business Participation are included, with goals for various small business categories (SB, SDB, WOSB, SDVOSB, HUBZone SB, ISBEE).

• Registration in System for Award Management (SAM.gov) is required prior to proposal submission.

• Payment requests must be submitted electronically through the U.S. Department of Treasury's Invoice Processing Platform (IPP); waivers are on a case-by-case basis.

• Reclamation Safety and Health Standards are applicable.

• Offerors must review all sections, including drawings, geologic data, and contract clauses.

Form / Attachment / Pricing Sheet

This document comprises detailed engineering drawings and plans for the Heart Butte Dam Safety of Dams Modification project, as well as the Spillway and Outlet Works. It includes various plans, sections, details, and tables essential for understanding the project's scope and technical requirements.

• General Plans and Sections: Overviews of the dam, dike, spillway, and outlet works (e.g., 203-D-87, 263-D-87).
• Excavation and Grading: Details on excavation limits, final grading, and borrow areas.
• Structural Modifications: Plans for spillway channel remediation, jet grouting, drain pipes, MSE walls, and conduit grouting.
• Instrumentation and Monitoring: Drawings for piezometers, measurement points, and dewatering systems.
• Spillway and Outlet Works Specifics: Detailed drawings for inlet structures, gate chambers, shafts, and stilling basins.
• Conduit Details: Reinforcement drawings for various conduit sections.
• Geology and Site Investigation: Drawings related to site geology, borrow areas, boreholes, and test pits.
• Standard Designs: Components like PVC waterstops, grout agitators, ladders, fencing, and concrete reinforcement.
• Data Tables: Control point data (Northing, Easting, Elevation), dewatering well specifications, and material descriptions.
• Curves and Routing: Area-capacity-discharge curves and flood routing information.
• Legends and Notes: Comprehensive symbols and critical project specifications.

These drawings are crucial for potential bidders to grasp the full scope of work, existing conditions, proposed modifications, and specific technical requirements. They provide the detailed technical basis for bid proposals, outlining physical layout, material specifications, and required construction methodologies. Understanding these precise technical details on dimensions, materials, reinforcement, and excavation is essential for accurate bidding, project planning, and execution.

Specifications / Technical Documents

This document contains detailed specifications for the "Heart Butte Dam Safety of Dams Modification" project. It outlines the technical requirements, materials, and procedures for various aspects of the modification work.

• Division 01 - General Requirements: Covers general aspects of the project including summary of work, use of site, work restrictions, project management, construction program, safety, site security, and reference standards.
• Division 02 - Existing Conditions: Details existing conditions relevant to the project, such as fishing platforms, access ramps, and sidewalks.
• Division 03 - Concrete: Specifies requirements for concrete forming, concrete reinforcing, post-installed adhesive anchors, and cast-in-place concrete.
• Division 05 - Metals: Outlines requirements for metal fabrications.
• Division 08 - Openings: Details requirements for roll-up doors.
• Division 31 - Earthwork: Covers dust abatement, care of reservoir releases during construction, cofferdams, temporary channel crossings, removal and control of water, excavation, use of borrow areas, controlled low strength material, embankment general requirements, reinforced backfill material, geotextiles, and jet grouting.
• Division 32 - Exterior Improvements: Includes riprap, riprap bedding, gravel surfacing, and chain link fence specifications.
• Division 51 - Information Available to Offerors: Provides information on DOI security forms, climatological data, historic reservoir elevations, instrumentation data, environmental assessments, and photographs.
• Division 52 - Drawings: Lists the drawings associated with the project.
• Division 53 - Geologic Investigations and Records: Contains geological drawings and logs.

This document is critical for potential bidders as it defines the comprehensive technical specifications and requirements for the Heart Butte Dam modification project. It details the scope of work, materials, construction methods, and quality control measures that must be adhered to. Bidders should review these specifications thoroughly to understand the project's demands and to prepare accurate proposals.