The Geotechnical Memo 16-24 provides preliminary geotechnical findings and recommendations for the Wind River Road Slide Reconstruction Project (WA FLAP SKAMAN 92135(1)) in Skamania County, Washington. The project aims to stabilize Wind River Road, which is experiencing ongoing damage from an active landslide. Key recommendations include retaining wall type and location, slope grading, and landslide mitigation. The memo details the site's geology, seismic conditions, and subsurface information from borings, highlighting the presence of an active landslide with a distinct shear zone and prehistoric landslide deposits. Slope stability analyses were conducted, indicating unstable conditions under undrained scenarios. The project involves improving road stability, replacing guardrails, and upgrading drainage systems, with careful consideration for potential destabilization during construction. This preliminary report will inform the 30 percent plan set, with a final geotechnical report to follow.

This Invitation for Bids (IFB) from the U.S. Department of Transportation, Federal Highway Administration, solicits bids for the "Wind River Road Slide Reconstruction" project (Solicitation No. 69056725B000013) in Skamania County, WA. The project, a total small business set-aside, involves road and bridge construction over 0.5 miles with an estimated price range of $5,000,000 to $10,000,000. Bids must be submitted in printed copy, as electronic bids are not accepted, and require completion of SF 1442, a bid schedule, and a valid bid bond with Power of Attorney. Key requirements include adherence to Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects (FP-24), a fixed completion date of October 30, 2026, and compliance with various Federal Acquisition Regulation (FAR) clauses, including those related to Buy American, responsibility matters, and security prohibitions. The document also includes forms for authority to sign for different business structures (corporation, LLC, partnership, joint venture, sole proprietorship) and a comprehensive bid submittal checklist.

The WA FLAP SKAMAN 92135(1) project, Wind River Road Slide Reconstruction, is located near Carson City, Skamania County, Washington, and spans 0.3 miles. The project, estimated to cost between $5,000,000 and $10,000,000, is tentatively scheduled for solicitation in Fall/Winter 2025 and completion in Fall/Winter 2026. The work primarily involves constructing retaining walls, installing and replacing guardrails, lining culverts, and paving. Key aspects include comprehensive construction surveys, quality control, erosion and sediment control measures, earthwork such as clearing, grubbing, and excavation, and the installation of soldier pile and mechanically stabilized earth walls. The project also entails significant asphalt paving, including milling and the application of tack coat. Incidental construction covers lining pipe culverts, installing various guardrail systems and terminal systems, turf establishment, temporary stream diversion, and extensive temporary traffic control measures to ensure safety and manage traffic flow during construction.

The Western Federal Lands Highway Division (WFLHD) has issued a Notice to Prospective Bidders for the Wind River Road Slide Reconstruction project (Solicitation No. 69056725B000013) in Skamania County, Washington. The project involves retaining walls, guardrail installation/replacement, culvert lining, and paving. Preliminary plans are available to help bidders understand the scope and location, and prospective bidders are encouraged to view the site during summer/fall 2025. Technical questions should be submitted via email to wfl.plans-spec@dot.gov, and general questions can be directed to wfl.contracts@dot.gov or 360-619-7520. Solicitation documents will be released in Fall 2025; interested parties should monitor www.sam.gov and utilize the “Follow” feature for automatic notifications. This notice, dated August 25, 2025, serves as an alert for an upcoming federal RFP.

This government file details the "Clearing Limits" for the FEDERAL HIGHWAY ADMINISTRATION's Western Federal Lands Highway Division Project, specifically WA FLAP SKAMAN 92135(1) WIND RIVER ROAD SLIDE RECONSTRUCTION. The document provides extensive station offset, northing, and easting data for two offset alignments: Clearing_Limit_R and Clearing_Limit_L. These alignments define the right and left clearing limits, respectively, for the baseline alignment ALI_MAIN_01. The report, generated on October 3, 2025, specifies all units in feet and is crucial for outlining the precise geographical boundaries for the road reconstruction project, ensuring accurate land clearing and construction in accordance with federal highway standards.

The document details construction limits for the FEDERAL HIGHWAY ADMINISTRATION WESTERN FEDERAL LANDS HIGHWAY DIVISION PROJECT, specifically WA FLAP SKAMAN 92135(1) WIND RIVER ROAD SLIDE RECONSTRUCTION. It presents a

The "Cross Section Gradebook with Northing/Easting Report" provides detailed topographical and geological data for an alignment named ALI_MAIN_01, recorded on October 3, 2025. The report, measured in feet, outlines various features such as Slope_Stake_Cut_L, EOG_Layer4_Btm_Outside_L, EOP_Layer1_Btm_Outside_L, EOG_Layer4_Top_Outside_L, and EOS_Layer1_Btm_L across multiple stations from 10+00.000 to 27+08.000. For each feature and station, the report includes offset, elevation, Northing, Easting, existing ground elevation, and slope percentages. This data is critical for understanding the terrain and subsurface conditions along the specified alignment, likely for civil engineering, construction planning, or environmental assessment projects, providing essential information for federal and state-local government RFPs, and federal grants.

The document outlines a process for transferring Survey Control point lists from an Excel format to Excel plan sheets for the WA FLAP SKAMAN 92135(1) - Wind River Road Slide Reconstruction project. It provides instructions for inserting common sheet information, handling data location, and managing additional sheets. The project uses US Survey Foot units, Washington South SPCS NAD83 2011 coordinate system, and Orthometric elevations based on NAVD88 GEOID18. The field and final adjustment dates are May 2022. The document includes a table with point numbers, state plane coordinates (North, East, Elevation), geo coordinates (Latitude, Longitude), ellipsoid height, combined factor, and description for several survey control points, emphasizing the precise checking of distances between points.

The Earthwork Report for WA FLAP SKAMAN 92135(1) Wind River Road Slide Reconstruction project provides detailed cut and fill volume calculations for various stations along the COR_MAIN_01 and ALI_MAIN_01 corridors. The report, generated on September 3, 2025, meticulously lists material, area, and volume data in feet, square feet, and cubic yards. It systematically presents numerous entries for both 'Cut Volume' and 'Fill Volume' across a wide range of stations, from 10+00.000 to 26+24.038. The document concludes with totals for both cut and fill volumes, indicating a substantial amount of earthwork, with a total estimated cut volume of 5460.266 cubic yards. The report is crucial for understanding the scope of excavation and embankment required for the slide reconstruction project.

The document "Wind River Road" is a LandXML file detailing an existing ground surface survey. It specifies Imperial units for area (square foot), linear (US Survey Foot), volume (cubic yard), temperature (fahrenheit), and pressure (inHG). The file was created on September 3, 2025, at 09:03:01 using Bentley Systems' OpenRoads Designer version 10.12.02.4. The core of the document consists of a Triangulated Irregular Network (TIN) surface named "Existing Ground Surveyed," defined by 456 points, each with unique ID, X, Y, and Z coordinates. This data is crucial for engineering and construction projects requiring precise terrain modeling.

The WA FLAP SKAMAN 92135(1) project,

The “Wind River Road Slide Reconstruction” project, WA FLAP SKAMAN 92135(1), by the Federal Highway Administration, U.S. Department of Transportation, involves reconstructing a 0.32-mile section of Wind River Road in Skamania County, Washington. This preliminary plan includes constructing a soldier pile wall and a mechanically-stabilized earth wall, asphalt overlay, guardrail replacement, and culvert lining. The project aims to address a slide on Wind River Road and improve infrastructure, including detailed plans for typical sections, pavement transitions, survey control, and drainage. Various erosion control measures, such as silt fences, fiber rolls, and check dams, are also detailed.

A memo from Michael Traffalis, Project Manager, formally announces a change in the project name from WA FLAP SKAMANIA 92135(1), Wind River Road Slide Reconstruction to WA FLAP SKAMAN 92135(1), Wind River Road Slide Reconstruction, effective January 28, 2022. All associated project files will now be linked to the new name. For any questions, Michael Traffalis can be contacted at Michael.Traffalis@dot.gov. The memorandum is dated February 1, 2022.

This government file, created for the Federal Highway Administration, Western Federal Lands Highway Division Project WA FLAP SKAMAN 92135(1) Wind River Road Slide Reconstruction, provides detailed horizontal and vertical alignment reports for "MAIN 01." The horizontal alignment report outlines various linear and circular elements of the road, including stationing, northing, easting, tangential directions and lengths, radii, delta angles, and degrees of curvature. It details the progression of the alignment through multiple tangents and curves with specific geometric parameters. The vertical alignment report complements this by presenting elevation data at different stations, tangent grades, and lengths, as well as parameters for symmetrical parabolic curves, including length, entrance and exit grades, and middle ordinates. Both reports provide precise engineering specifications crucial for the design and reconstruction of the Wind River Road, ensuring proper geometric configuration and grade for safety and functionality.

The document provides detailed Horizontal and Vertical Alignment Reports for MAIN 01, a project under the FEDERAL HIGHWAY ADMINISTRATION's Western Federal Lands Highway Division. Specifically, it pertains to the WA FLAP SKAMAN 92135(1) Wind River Road Slide Reconstruction. The horizontal alignment report, created on September 3, 2025, details various linear and circular elements of the road's path, including stationing, northing, easting, tangential directions, lengths, radii, and delta angles. The vertical alignment report, also created on the same date, outlines the road's elevation profile, including tangent grades, lengths, and symmetrical parabola elements. Both reports are crucial for the design and construction phases of the Wind River Road Slide Reconstruction project, ensuring precise adherence to engineering specifications and safety standards.

The LandXML file outlines the proposed finish subgrade surface for the "Wind River Road" project, generated using Bentley Systems' OpenRoads Designer. The file specifies imperial units, including square feet for area, US Survey Foot for linear measurements, and cubic yards for volume. It contains a detailed triangulated irregular network (TIN) surface named "Terr_Pro_subgrade_surface," defined by 435 coordinate points with their respective X, Y, and Z values. This data is critical for precise civil engineering and construction, likely serving as a foundational reference for federal, state, or local infrastructure development projects, such as road construction or grading within an RFP or grant context.

The LandXML file details the proposed finish surface for the "Wind River Road" project, generated using OpenRoads Designer version 10.12.02.4 by Bentley Systems, Inc. The file specifies imperial units for measurements, including square feet for area, US Survey Feet for linear distances, cubic yards for volume, Fahrenheit for temperature, and inHG for pressure. The core of the document is a Triangulated Irregular Network (TIN) surface named "Terr_Pro_WindRiver," which is defined by a comprehensive list of 435 3D coordinate points (P id=1 to P id=435). Each point includes precise X, Y, and Z coordinates, which collectively describe the topographical data for the proposed road surface.

The Wind River Road Slide Reconstruction Project in Skamania County, Washington, aims to mitigate ongoing slope movements and widen the road shoulder. WSP USA Inc. conducted supplemental geotechnical explorations, including borings and laboratory testing, to provide recommendations for the Mechanically Stabilized Earth (MSE) wall and micropile with cap beam design. The report details subsurface conditions, seismic design parameters, and engineering analyses for global stability, bearing resistance, and sliding resistance for the MSE wall. It also includes micropile stabilization analyses, design criteria, and construction considerations, such as overexcavation and drilling conditions. The project seeks to stabilize the area and improve road infrastructure, with WSP providing oversight throughout the design and construction phases.

This document presents a series of cross-section diagrams for the "MAIN 01" section of the Wind River Road Slide Reconstruction project (WA FLAP SKAMAN 92135(1)), overseen by the Federal Highway Administration's Western Federal Lands Highway Division. The diagrams, dated September 3, 2025, illustrate design grades and original ground elevations at 50-foot intervals, ranging from station 10+00.00 to 27+08.00. Additionally, a cross-section for "CULVERT LINING" at station 20+67.32 is included. These detailed cross-sections provide critical topographic and grading information essential for the planning and execution of the slide reconstruction and culvert lining phases of the project, indicating various slopes and elevations across the road's width.

This document, a "Cross Section Gradebook with Northing/Easting Report" for the FEDERAL HIGHWAY ADMINISTRATION's Western Federal Lands Highway Division Project WA FLAP SKAMAN 92135(1) Wind River Road Slide Reconstruction, provides detailed X, Y, Z coordinates for the subgrade (Blue Tops) of MAIN 01. The report, generated on Friday, October 3, 2025, details various features such as Slope_Stake_Cut_L/R, ETW_Layer4_Btm_L, EOS_Layer4_Btm_R, EOG_Layer4_Btm_R, EOG_Layer4_Btm_Outside_R, and MSE_Backfill3_Subgrade1, along with their respective offsets, elevations, northings, and eastings, all measured in feet. It covers stations from 10+00.000 to 27+08.000, illustrating the existing ground conditions and calculated slopes at different points along the alignment. The purpose of this report is to provide precise topographical data essential for the reconstruction of the Wind River Road slide, a critical component for federal highway administration projects involving detailed civil engineering and construction planning.

This government file, part of the FEDERAL HIGHWAY ADMINISTRATION WESTERN FEDERAL LANDS HIGHWAY DIVISION PROJECT WA FLAP SKAMAN 92135(1) WIND RIVER ROAD SLIDE RECONSTRUCTION, provides detailed X, Y, Z Coordinates, Final Grade (Red Tops), Offset, Elevation, Northing, Easting, Existing Ground, and Slope data for the MAIN 01 alignment. The report, generated on October 3, 2025, presents measurements in feet across various stations (from 10+00.000 to 27+08.000) for several features, including EOP_Layer1_Btm_Outside, EOS_Layer1_Btm, ETW_Layer1_Btm, CL_Layer1_Btm, ETW_Layer4_Top, and CL_Layer1_Btm1, for both left and right sides where applicable. This data is critical for the reconstruction project, offering precise topographical and grade information essential for planning and execution.

The WFLHD Construction Contract Administration document outlines the Federal Highway Administration's (FHWA) procedures for definitizing equitable adjustments for change orders under construction contracts, as required by FAR 36.211. It clarifies that there are no agency-specific additional policies at this time. The document provides data for fiscal years 2021, 2022, and 2023, detailing the time taken to definitize change order proposals after receiving an adequate proposal. The data is categorized by various timeframes, from 0-30 days to 366 or more days, and also indicates cases definitized after contract performance. This information serves to fulfill the FAR requirement for reporting past performance regarding the timeliness of definitizing equitable adjustments.