Z--ALPO STABILIZATION OF STAPLE BEND TUNNEL

This federal contract amendment (Amendment 0001) modifies solicitation 140P4226R0026 for the "Tunnel Stabilization of Staple Bend Tunnel" project at the Allegheny Portage Railroad National Historical Site (ALPO). Issued by the National Park Service's Northeast Regional Contracting office in Philadelphia, the amendment's primary purpose is to extend the proposal submission deadline to Friday, October 30, 2026, while the government addresses outstanding technical questions. The underlying procurement is designated as a 100% Small Business Set-Aside to secure a Firm-Fixed Price contract. The established period of performance for the stabilization work is from November 9, 2026, to December 31, 2027. To remain eligible for award, offerors must acknowledge receipt of this amendment prior to the revised closing date and time using one of the approved standard methods. All other terms and conditions of the original solicitation remain unchanged.

This federal solicitation (140P4226R0026) is issued by the National Park Service (NPS) for the tunnel stabilization of the Staple Bend Tunnel at the Allegheny Portage Railroad National Historic Site (ALPO) in Pennsylvania. Solicited as a 100% Small Business Set-Aside under Simplified Acquisition Procedures, the project requires a firm-fixed-price contract with a performance period of 190 days after the Notice to Proceed. The scope of work is divided into ten base items and two optional items (subject to funding). Base items include developing a stabilization maintenance plan, scaling loose rock, conducting a fossil inventory led by a qualified paleontologist, installing rock bolt anchors, pouring void fill concrete, applying gunite with wire mesh, establishing French and strip drainage systems, and constructing signposts. Optional items consist of a 3D scan and installing bat houses. Contractors must meet strict safety and operational standards, including OSHA regulations for underground construction, NPS fire prevention, and hot work permit protocols. Specific personnel requirements are mandated, including an experienced paleontologist meeting PRPA standards and a certified tunnel inspector as team leader. Due to the historic nature of the site, the contractor must adhere to strict historic preservation and archaeological protection procedures, halting work immediately if any cultural or paleontological resources are discovered. Additional guidelines govern environmental compliance, waste management, and the prioritized procurement of biobased and sustainable products.

This document comprises engineering and geological appendices prepared by Tetra Tech for the National Park Service (NPS) regarding the Staple Bend Tunnel at the Allegheny Portage Railroad National Historic Site (ALPO) in Johnstown, Pennsylvania. Dated early 2025, these technical materials support a federal infrastructure or restoration project by detailing the site's geological profile, rock mechanics, and physical layout. Appendix A provides geographic and logistical context through a regional Location Map, a Geological Map illustrating local rock formations, and a Site Plan designating specific working, parking, and storage areas around the tunnel's North and South Portals. Appendix C contains extensive geomechanical data from laboratory and field testing conducted on sandstone and shale core samples. Key deliverables include Unconfined Compressive Strength (UCS) test results, Young’s Modulus calculations, unit weights, and density metrics processed by Montana Tech's Geomechanics Lab. Additionally, this appendix includes tilt test results, structural field measurements (detailing joint, contact, and bedding dip directions from stations 1+50 to 7+40), and rock support recommendations utilizing the NGI Q-system for tunnel spans. Appendix E consists of a comprehensive photographic log, documenting the condition of both the North and South walls of the tunnel sequentially across stations 1+50 through 7+50. Collectively, these documents provide the foundational geological, structural, and spatial data necessary for contractors to assess stability and plan rehabilitation work on the historic tunnel.

This document is Attachment 10 (Proposal Submission Package) for Solicitation 140P4226R0026, issued by the National Park Service. The project involves tunnel stabilization at the Staple Bend Tunnel within the Allegheny Portage Railroad National Historical Site (ALPO). The package serves as a template for offerors to submit required proposal information, consisting of three main sections: 1. **Proposal Certification Cover Sheet:** Requires the contractor's Unique Entity ID (UEI), signature, and certification of SAM registration under NAICS code 237990 (Other Heavy and Civil Engineering Construction) as a small business. It also certifies compliance with biobased product requirements, subcontracting limitations (Attachment 9), and past performance submission. 2. **Relevant Experience Questionnaire:** A form for offerors to detail three past projects of similar scope and complexity. Required details include project names, locations, contract values, periods of performance, agency contact information, and project descriptions. 3. **Biobased Certification:** A section where offerors must list the specific biobased products they intend to use, including their description and percentage of biobased content. Additionally, offerors must document their experience purchasing and installing biobased products over the past two years. If offerors choose to submit alternative documentation, it must contain all the information requested in this attachment.

This document is a "Report on Limitations on Subcontracting" template for federal solicitation number 140P4226R0026, issued by the Department of the Interior (DOI) and National Park Service (NPS). It consists of two tracking forms designed to monitor compliance with the Small Business Administration's (SBA) subcontracting limits under FAR clause 52.219-14 (OCT 2022 DEVIATION). The first form is submitted with the initial proposal to project anticipated participation, while the second form is submitted at contract closeout to report actual expenditures. The template is tailored for general construction projects under NAICS code 237110, where a set-aside prime contractor must not subcontract more than 85% of the contract's labor costs (excluding materials) to non-similarly situated (NSS) subcontractors. The forms calculate and compare the total contract price against payments made to the prime contractor, similarly situated subcontractors (SSS)—which are first-tier subcontractors with the same small business program status—and non-similarly situated subcontractors. These calculators ensure the prime contractor and its SSS partners perform the legally required percentage of work, preventing pass-through contract schemes.

This technical document consists of engineering and construction drawings for the Staple Bend Tunnel Preservation and Visitor Access Improvements project at the Allegheny Portage Railroad National Historic Site in Cambria County, Pennsylvania. Prepared for the National Park Service, the plans outline a comprehensive preservation and stabilization effort for the historic tunnel and its surrounding visitor trails. Key components of the project detailed in the drawings include: - **Geotechnical and Structural Stabilization:** Detailed geological profiles of the tunnel's sandstone and shale strata guide the installation of roof rock bolts, structural shoring posts, and temporary rock stabilization measures. - **Retaining Wall and Foundation Engineering:** Plans specify the reconstruction of dry-laid stone walls, concrete retaining walls with stone facing, and concrete pier foundations for a future pedestrian bridge. - **Water Vault Modifications (Option 1):** Structural and mechanical modifications to an existing 48-inch water line vault, including a new precast concrete vault lid designed for HS15 wheel loads, a new manhole, and spillway modifications. - **Site Layout, Grading, and Landscaping:** Detailed trail plans (Levels 2 and 12), parking area preparations, and a master plant list containing native canopy trees, understory trees, and shrubs (such as Red Maple, Serviceberry, and Rhododendron) to restore the surrounding historic landscape. The drawings establish exact material specifications, coordinates, and construction details required to safely execute the historic preservation and infrastructure upgrades.

This National Park Service (NPS) Denver Service Center (DSC) document provides instructions and a template for the Submittal List with Review Estimate, specifically tailored for the Staple Bend Tunnel Stabilization project (PMIS No. 215161). It outlines the roles of the Design Architect/Engineer (A/E), Construction Contracting Officer Representative (COR), and Construction Management Representative (CMR) in preparing and reviewing construction submittals. The process requires the A/E to list all construction submittals and estimate the review hours per discipline for Action submittals, which require formal government response. Conversely, all Informational submittals, such as schedules and safety plans, are routed to the CMR for review and do not require A/E action. The COR utilizes this completed template to formulate the government's independent cost estimate and negotiate the submittal review portion of the A/E's Construction Services task order. Ultimately, the document serves as a structured tool to align project scopes, estimate labor hours, and manage quality assurance workflows during the construction phase.

This government document is a wage determination schedule issued under the Davis-Bacon Act for construction projects in Maryland (specifically listing counties such as Montgomery, Prince George's, and others). It outlines the prevailing wage rates and fringe benefits required for various labor classifications, including heavy construction and highway construction roles. The schedule specifies minimum hourly pay rates and employer fringe benefit contributions for a wide range of skilled trades and laborers. Key positions covered include carpenters, electricians, ironworkers, plumbers, equipment operators (such as backhoe, crane, and excavator operators), truck drivers, and general laborers. The document details specific wage variations based on the type of construction project, such as sewer and water line installations, paving, and general highway work. Additionally, the document provides instructions on the proper application of these rates, guidelines for apprentice and helper classifications, and the administrative process for requesting additional classifications or appealing existing wage rates through the Department of Labor. This determination ensures federal compliance and fair labor standards for contractors bidding on and executing public works projects in the designated Maryland regions.

This document contains the official construction drawings and engineering plans for the federal project to stabilize the Staple Bend Tunnel, located within the Allegheny Portage Railroad National Historic Site (ALPO) in Cambria County, Pennsylvania. Prepared for the National Park Service (NPS) Denver Service Center by prime contractor Great West Engineering and geotechnical partner Tetra Tech, the project is registered under PMIS/PKG No. 196450 / 215161. The comprehensive 10-sheet package details specific structural mitigations designed to secure the historic tunnel. Key elements of the scope of work include: - **Staging and Mobilization:** Establishing secure staging areas at both the north and south portals, managing safety barriers, and coordinating pedestrian traffic. - **Environmental Safeguards:** Implementing strict bat exclusion measures prior to construction to protect local endangered bat species, alongside protocol for managing paleontological discoveries. - **Structural Reinforcement:** Detailed plans to install 17 proposed rock bolts, replace missing anchor plates, place shoring posts, and install void-fill concrete along designated sections from Station 1+00 to Station 8+00. - **Drainage and Stabilization:** Installing a 900-foot rectangular French drain system utilizing perforated PVC pipes and geotextiles, alongside optional wall stabilization using mesh and gunite. The drawings establish exact geotechnical alignments, station profiles, and photographic references of both tunnel portals to guide contractors in executing these critical preservation and safety upgrades.

This document outlines the project specifications and Division 1 administrative requirements for the Staple Bend Tunnel Stabilization project at the Allegheny Portage Railroad National Historic Site in Johnstown, Pennsylvania. Managed by the National Park Service (NPS) Denver Service Center, the project involves critical tunnel rehabilitation work including rock bolting, gunite installation, void fill concrete, shoring post installation, rock scaling, and mesh installation. The specifications define the limited site use, public trail rerouting, and work hours, which are generally set from 6 a.m. to 6 p.m. but allow for potential 24-hour operations. Strict guidelines are established for contract modification procedures, specifying allowable home office overhead, field office overhead (general conditions), and direct project costs, while capping total combined markup at 25%. The document details twelve specific contract line items (CLIs) for payment, spanning stabilization maintenance, scaling, paleontological fossil inventory, drainage, and optional items like 3D scanning and bat houses. Additionally, it mandates comprehensive project coordination, the use of NPS-administered communication software, and rigorous construction scheduling. Contractors must submit a cost-and-resource-loaded Critical Path Method (CPM) baseline schedule and provide monthly updates as a prerequisite for progress payments. Environmental coordination, including designating an on-site Environmental Manager and conducting worker training, is also required.

This document outlines the Statement of Structural Tests and Special Inspections for the Staple Bend Tunnel Stabilization Project at the Allegheny Portage Railroad National Historic Site (ALPO). Prepared by Tetra Tech, Inc. for the National Park Service (NPS) Denver Service Center (DSC), the program adheres to Chapter 17 of the 2024 International Building Code (IBC 2024). Seismic and wind requirements are designated as not applicable to this stabilization work. The document defines the qualification standards required for inspectors and testing technicians, including certifications from ACI, AWS, ICC, and NICET. It details the required continuous and periodic inspections for concrete placements, post-installed and cast-in anchors, formwork, and Level 1 through Level 3 masonry construction quality assurance. The structural geology and design calculations sections include stereonet kinematic analyses (planar sliding, wedge sliding, and flexural toppling) alongside UNWEDGE and Phase2 (FEZ) finite element modeling software outputs. These analyses evaluate safety factors, wedge weights, support pressures, and structural displacement across various tunnel stations (ranging from Sta. 1+75 to Sta. 6+75). The data determines the geological stability of the rock mass and measures the effectiveness of proposed stabilization and support systems within the historic tunnel.

This document consists of a 18-sheet set of topographic survey maps for the Staple Bend Unit of the Allegheny Portage Railroad National Historic Site, located in the Mid-Atlantic region of Pennsylvania. Prepared for the United States Department of the Interior, National Park Service, Denver Service Center, these sheets represent a detailed aerial and land topographic survey. The primary purpose of these technical drawings is to establish precise civil and geographical baselines for the historical park unit, likely supporting federal resource management, infrastructure planning, or historical preservation projects. Key technical specifications detailed across all sheets include: - **Horizontal Datum**: Pennsylvania State Plane Coordinates, South Zone, based on a Thomas survey of 1981. - **Vertical Datum**: NGVD 1929, based on the USC&GS Monument Z-122. - **Map Scales and Intervals**: Drawn at a scale of 1 inch to 40 feet, featuring a contour interval of 2 feet. - **Survey and Production Timeline**: Fieldwork was conducted in May 1988 (Fife) and September 1988 (Kucera), with drafting completed in September 1988 and checked in October 1988. The mapped features document the local topography, Conrail railroad lines, historical railroad traces, nearby rivers, rock formations, and the approximate locations of the historic railroad tunnel portals (including the North Portal). These sheets provide the necessary geospatial and engineering foundations required for any federal contracting, preservation, or construction initiatives within this National Park Service unit.