Howard Street Tunnel Project

June 10, 2025: Public Notice of Section 4(f) de minimis Use of Baltimore City Department of Recreation and Parks land at Clifton Park. Public comment period is 10 days and ends on June 20, 2025.

Section 4(f) de minimis Impact

Clifton Park

CSX Howard Street Tunnel Project

Pursuant to the requirements of 23 CFR 774.5, notice is hereby given that CSX is accepting written comments regarding the Baltimore City Department of Recreation and Parks (BCDRP) concurrence with the Federal Railroad Administration’s (FRA) Section 4(f) applicability criteria for de minimis (minimal) impact on BCDRP parkland (i.e. Clifton Park) as a result of the Howard Street Tunnel (HST) project.

CSX is currently advancing a design change requested by the BCDRP associated with the Harford Road Bridge replacement project site in Baltimore, Maryland which is part of the larger HST project. The Harford Road Bridge replacement was included in the 2021 HST Project Environmental Assessment (EA). Implementation of the construction activities in this area will result in the temporary closure of an existing access way to the REACH! Partnership School #341. As such, the BCDRP, along with the REACH school, has requested a paved access road be constructed to provide access to the school for employees during construction. A portion of the access road, approximately 0.5 acres, would be on Clifton Park and would connect Saint Lo Drive to the school’s existing parking lot. The access road would be for school use only and would not be used by construction vehicles or as a detour route for the general public. The BCDRP would retain ownership of the property and access road when the HST project is complete.

Consistent with 23 CFR 774.3.(b), FRA intends to issue a de minimis impact finding, given that the access road will not adversely affect the activities, features, or attributes that make the property eligible for Section 4(f) protection. The BCDRP has been notified of this finding and concurred with FRA’s de minimis impact determination.

If you have any comments, questions, or need any additional information, please contact Bill Parry by e-mail at William_Parry@csx.com. Please provide any comments by June 20, 2025.

View the Finding of No Significant Impact (FONSI)

View the Environmental Assessment (EA)

Watch the public outreach video

Project Overview

The Howard Street Tunnel (HST) Project consists of vertical clearance improvements along CSX’s I-95 Rail Corridor to allow double-stack trains (trains transporting shipping containers stacked on top of each other) to travel between Baltimore City, Maryland and Philadelphia, Pennsylvania. The primary obstacle to double-stack service along this corridor has been the Howard Street Tunnel, a 1.7-mile-long railroad passage under the heart of Baltimore City that was originally constructed in 1895. With current vertical clearances up to 18 inches less than the 21 feet necessary for double-stack, the HST and 21 other clearance obstructions currently restrict the ability to move double-stack trains along this section of CSX’s network, including to and from the Port of Baltimore.

Utilizing funding from the U.S. Department of Transportation (USDOT), CSX, the State of Maryland, and the Commonwealth of Pennsylvania, the HST Project will eliminate all remaining double-stack obstructions in Maryland, Delaware, and Pennsylvania between Baltimore City and Philadelphia. FRA is the lead federal agency and CSX is the project sponsor. The HST Project consists of the following work, at the following locations.

Clearance Obstruction	Scope of Work	Jurisdiction	Location Map
State of Maryland
Howard Street Tunnel	Tunnel Modifications	Baltimore City	Click here
Mount Royal Avenue	Track Lowering	Baltimore City	Click here
MTA Bridge	Track Lowering	Baltimore City	Click here
North Avenue	Bridge Modifications	Baltimore City	Click here
Sisson Street	Track Lowering	Baltimore City	Click here
Huntington Avenue	Track Lowering	Baltimore City	Click here
Charles Street	Track Lowering	Baltimore City	Click here
St. Paul/Calvert Street	Track Lowering	Baltimore City	Click here
Guilford Avenue	Bridge Replacement	Baltimore City	Click here
Barclay Street	Track Lowering	Baltimore City	Click here
Greenmount Avenue	Track Lowering	Baltimore City	Click here
Harford Road	Bridge Replacement	Baltimore City	Click here
State of Delaware
Lancaster Avenue	Track Lowering	Wilmington	Click here
4th Street	Track Lowering	Wilmington	Click here
Commonwealth of Pennsylvania
Chichester Avenue	Track Lowering	Boothwyn	Click here
Clifton Avenue	Track Lowering	Sharon Hill	Click here
Boone Tunnel	Track Lowering	Sharon Hill	Click here
68th Street	Track Lowering	Philadelphia	Click here
65th Street	Track Lowering	Philadelphia	Click here
Cemetery Avenue	Track Lowering	Philadelphia	Click here
61st Street	Track Lowering	Philadelphia	Click here
Woodland Avenue	Track Lowering	Philadelphia	Click here

National Environmental Policy Act (NEPA)

The HST Project has been evaluated in accordance with the National Environmental Policy Act (NEPA). The NEPA process requires federal agencies to assess the potential environmental effects of their proposed actions prior to making decisions regarding the proposed action. The USDOT’s Federal Railroad Administration (FRA) is the federal agency leading the NEPA process for this project. An Environmental Assessment (EA) document was prepared in accordance with NEPA and FRA’s NEPA implementing regulations to evaluate the potential environmental impacts of the HST Project. The EA and associated appendices are available for review by clicking on the below links.

Environmental Assessment

Appendix A - Figures

Appendix B - Section 4(f) Evaluation

Appendix C - Air Quality Report

Appendix D - Wetland Delineation Report

Appendix E - Noise and Vibration Report

Appendix F - Socioeconomic Report

Appendix G - Environmental Justice Report

Appendix H - Section 106 Archaeological Report (Sensitive information redacted)

Appendix I –Section 106 Architectural Report

Appendix J - Draft Section 106 Memorandum of Agreement (MOA)—The MOA was executed on May 25, 2021. A link to the final executed MOA is provided in the Section 106 Mitigation section below.

Appendix K – Agency Consultation

Due to COVID-19 protocols, traditional public open houses could not be offered as part of the EA comment period that ran from March 1, 2021 until April 13, 2021. Instead, the following video was produced that summarizes the HST Project’s purpose and need, scope of work and potential environmental impacts.

Following the EA comment period, FRA prepared a Finding of No Significant Impact (FONSI) document to respond to comments and incorporate project updates since the release of the EA. The FONSI and associated appendices are available for review by clicking the below link.

FINDING OF NO SIGNIFICANT IMPACT

The FONSI represents final NEPA approval for the HST Project. Since publication of the FONSI, CSX has continued to advance the project design and coordinate with FRA regarding any minor design changes. FRA will continue this coordination throughout the final design and construction process to ensure the FONSI remains valid, and all commitments identified through the NEPA process are fulfilled.

Section 106 Memorandum of Agreement

Section 106 of the National Historic Preservation Act of 1966, as amended (Section 106), requires federal agencies to consider the effects of their actions on historic properties. Due to federal funding provided by USDOT to the Maryland Department of Transportation Maryland Port Administration (MDOT MPA), and the potential for the HST Project to affect historic properties, it is considered an undertaking under Section 106. FRA is the lead federal agency and CSX is the project sponsor.

FRA conducted Section 106 consultation with the Maryland, Delaware, and Pennsylvania State Historic Preservation Officers (SHPOs), federally recognized Indian tribes, and other consulting parties with interests in historic properties. Relevant documentation is provided in Appendix H, I, and K of the EA. FRA determined, in consultation with the Maryland, Delaware, and Pennsylvania SHPOs and other consulting parties that the HST Project will have an adverse effect on seven historic architectural properties located in Maryland and Pennsylvania. FRA, the Maryland SHPO, the Pennsylvania SHPO, MDOT MPA, and CSX entered into a Section 106 MOA to resolve the adverse effects of the HST Project on those historic properties. The MOA was executed on May 25, 2021. CSX retained a qualified cultural resources consultant to support fulfillment of its responsibilities under the MOA.

The links below provide copies of the MOA and the products resulting from implementation of the MOA. This webpage will continue to be updated as additional documentation is finalized.

Executed Memorandum of Agreement Among the Federal Railroad Administration, Maryland State Historic Preservation Officer, Pennsylvania State Historic Preservation Officer, Maryland Department of Transportation Port Administration, and CSX Transportation Regarding the Howard Street Tunnel Project, Baltimore City, Maryland and Delaware County, Pennsylvania (Howard Street Tunnel Section 106 MOA)
Maryland Inventory of Historic Places (MIHP) survey files were updated pursuant to Stipulation IV.C. Update Historic Property Survey Files. Copies of the updated documentation are linked below:

Five historic properties were recorded for the Historic American Engineering Record (HAER), pursuant to Stipulation IV.E. Historic American Engineering Record Documentation. The National Park Service accepted the documentation on June 22, 2023. Copies of the HAER recordation packages are linked below:

North Avenue Bridge (MD-203-A)

Guilford Avenue Tunnel (MD-203-B)

Harford Road Tunnel (MD-203-C)

An interpretive sign for the Boone Tunnel was fabricated pursuant to Stipulation IV.F. Interpretive Display. This sign is on display at the Darby Free Library in Darby, Pennsylvania. It was delivered on January 25, 2023.
Four annual reports have been completed, in 2022, 2023, 2024 and 2025.

The following two historic properties will be adversely affected by the HST Project, but updates to the existing MIHP or Determination of Eligibility (DOE) forms were not required by the stipulations of the MOA. Copies of the existing documentation of these two resources are linked below:

To learn more about historic properties in the HST Project vicinity, please visit these external websites of relevant preservation and history-based organizations:

Project Next Steps

Following NEPA approval, CSX divided the HST Project into ten packages for final design and construction. CSX began construction at a track lowering package in Pennsylvania in early 2022 and continues to advance the remaining packages into construction as soon as designs are complete and permits are secured.