SR 0001, Section RC3 Project Purpose and Need Statement August 2025 (Coming Soon)

SR 0001 Section RC3 US 1 Improvement Project Traffic and Safety Analysis Update Report September 2025 (Coming Soon)

US 1 Frontage Road Traffic Assessment Technical Memorandum July 2012 (Coming Soon)

Aquatic Resource Identification & Delineation Report January 2025 (Coming Soon)
Identification and delineation of state and federal regulated freshwater wetlands and waterways within and adjacent to the Build Alternative corridor.

PNDI Receipt April 18, 2022, November 13, 2024, and July 2, 2025 (Coming Soon)
Identification of federally and state-listed threatened and/or endangered species known to occur within or adjacent to the Build Alternative corridor. Review receipts prepared through the Pennsylvania Natural Diversity Inventory (PNDI). 

PNDI Coordination Response Letters with PA Fish and Boat Commission April 19, 2022, November 18, 2024, and August 8, 2025 (Coming Soon)
Coordination response letters from the PA Fish and Boat Commission regarding potential effects on species and/or their habitats within and adjacent to the Build Alternative corridor.

Determination of Effects Finding – Historic Structures October 2025 (Coming Soon)
Review of the Build Alternative and its impact on National Register of Historic Places (NRHP) listed or eligible properties.

Abbreviated Historic Resource Survey Forms 2024-2025 (Coming Soon)
Reconnaissance survey for historic resources within or adjacent to the Build Alternative corridor. The survey includes a review of the Pennsylvania Historic and Museum Commission’s files of resources identified as listed in or eligible for listing in the National Register of Historic Places (NRHP), and limited field investigation to identify properties potentially eligible for inclusion in the NRHP.

Determination of Effects Finding – Archaeology January 2025 (Coming Soon)
Review of the Build Alternative and its impact on archaeological resources. 

Phase I Environmental Site Assessment (ESA) October 2021 (Coming Soon)
Field survey and review of available background data to assess the Build Alternative’s impact on parcels potentially impacted by regulated and hazardous materials.

Phase I Environmental Site Assessment (ESA) Addendum September 2022 (Coming Soon)
Addendum to Phase I ESA Report to include review of available documentation within PA Department of Environmental Protection’s database for properties within or adjacent to the Build Alternative corridor.

Phase I Environmental Site Assessment (ESA) Recommendations Review July 2025 (Coming Soon)
Review of potential impacts to properties within or adjacent to the Build Alternative corridor and recommendations for further studies during final design phase for the project.

Air Quality Technical Memorandum September 2025 (Coming Soon)
Memorandum discussing a qualitative look at the Build Alternative’s potential impact on air quality within the project corridor.

Preliminary Technical Noise Report October 2022 (Coming Soon)
Identification and assessment of existing and proposed noise levels based on current and future traffic patterns associated with the Build Alternative compared to the future No Build Alternative.

Preliminary Engineering Noise Report Addendum Memo April 2025 (Coming Soon)
Memorandum discussing the current limits of the Build Alternative with previous limits to confirm that adequate noise assessment has occurred.

Community Impact Assessment Report August 2025 (Coming Soon)
Report to assess the impact that the Build Alternative would have on properties and resources within the corridor.

Section 4(f) Non-Applicability / No Use Checklist – Langhorne Historic District October 2025 (Coming Soon)
Form documenting the lack of use of the Langhorne Historic District Section 4(f) resource by the Build Alternative.

Section 4(f) Non-Applicability / No Use Checklist – The Mayor’s Playground September 2025 (Coming Soon)
Form documenting the lack of use of the The Mayor’s Playground Section 4(f) resource by the Build Alternative.

MPMS 93446 Route 1 Frontage Road Corridor CE Scoping Document February 2021 (Coming Soon)
Overview of identified resources within the project corridor and anticipated impact to natural, cultural, and socioeconomic resources with a build alternative.