Repairs to Locks 1, 2, 5, Inlet Lock 1, and Georgetown Walls

Guard Lock 1
Guard Lock near Mile 5, Montgomery County, Maryland

NPS | CHOH Professional Services Division

 

The towpath near Lock 5 (Mile 5) is open.
The towpath in Georgetown (Mile 1 – 0.4) is open.

The National Park Service has awarded a $12.7 million construction contract to undertake a large-scale rehabilitation project of multiple work areas in the Washington, DC and Montgomery County, Maryland portion of the park. This includes addressing deferred maintenance at historic Lift Locks 1, 2, 5, Inlet Lock 1, Guard Lock, and the feeder channel (where water is diverted into the canal from the Potomac River). The project will also stabilize and preserve historic canal walls in Georgetown at the following locations:

  • Level 1 – North and south walls between Locks 1 & 2
  • Level 2 – North and south walls near Lock 2
  • Level 4 – North and south walls upstream of Wisconsin Avenue
  • Level 4 – North wall adjacent to Potomac Street
  • Level 4 – North wall at 34th Street Northwest

The National Park Service issued Notice to Proceed to its construction contractor on February 27, 2024; construction staging will begin March 5. Work is anticipated to continue through Winter 2025/2026, weather dependent. These structures will undergo rehabilitation to ensure they remain functional into the future and remain reliable during the full range of flow conditions on the Potomac River. The lower five miles of the canal work as a system, with water being diverted from the Potomac River near miler marker 5 and flowing to Georgetown until entering Rock Creek near mile 0.4. Each of the water structures (Lift Locks 1, 2, 5, Inlet Lock 1, Guard Lock, and the feeder channel) being repaired under this contract have a critical role in water operations. Without rehabilitation, maintaining the watered landscape would be impossible.

To facilitate construction, water will need to be lowered in the canal during the entire duration of construction. Throughout construction, portions of the towpath may be closed with detours using adjacent streets and alleys in Georgetown as shown in the below maps.

 
Photo of two masonry structures - Inlet Lock 1 and Lift Lock 5.
Inlet Lock and Lock 5 near Mile 5, Montgomery County, Maryland

NPS | CHOH Professional Services Division

 

What is the P.L.A.N. ?

Purpose? [Why are we undertaking this project?]

This project will repair and stabilize multiple historic locks and stone walls in the Washington, DC and southern Montgomery County, Maryland portion of the C&O Canal National Historical Park. This work will stabilize critical structures to increase safety, resiliency, reliability, and sustainability. It is essential to maintaining the historic canal landscape and the watered canal experience in the lower five miles of canal through the Washington, DC portion into Georgetown. Additionally, the work on the historic stone walls in Georgetown will preserve those features and the adjoining structures they support.

Length? [When are we closing, and how long?]

Full Notice to Proceed was provided to the construction contractor on February 27, 2024; construction staging will start March 5. It is anticipated that the project will last through Winter 2025/2026, weather dependent.

Alternative Activities? [What can I do instead?]

Most sections of the canal towpath in Washington, DC and Georgetown will remain open to the public during repairs. Small sections of the towpath in Georgetown will be closed for extended periods of time to facilitate construction. Local detours around any towpath closures will be available on adjacent streets and alleys as shown in the below mapping. You can still bike, walk, run, and fish along the towpath in all areas outside of the work zone. You can still access the towpath via local detours. There are many sections of the towpath to be explored!

Next Step? [What are the future benefits?]

This rehabilitation work will ensure that the watered canal can be maintained for current and future generations for visitors to continue to experience, learn, and enjoy. A watered canal will also allow for canal boat rides for the public to continue. Project work on the historic stone walls in Georgetown will preserve those features and the adjoining structures they support. Remediating identified issues will improve safety and increase resiliency of park infrastructure to flooding and climate associated hazards.

 
Map of project area showing closure of towpath at Lock 5 and a detour route.
Feeder Channel, Guard Lock, Inlet Lock, and Lock 5 Detour Map (Mile 5, Montgomery County, Maryland)

NPS | CHOH Professional Services Division

 
Map of project area in Georgetown showing potential closures of the towpath and detour routes.
Georgetown Work Area Detour Map (Mile 0.4-1, Washington, DC)

NPS | CHOH Professional Services Division

 

CURRENT DETOURS AND CLOSURES

The towpath near Lock 5 (Mile 5) is open.
The towpath in Georgetown (Mile 1 – 0.4) is open.

 Visitors are asked to obey all signage and flaggers; using caution around all work areas.

FREQUENTLY ASKED QUESTIONS (FAQs)

What is the need for the project?

This project will preserve multiple historic canal infrastructure features across a five mile stretch of the canal. Work at each of the areas will stabilize critical structures to increase safety, resiliency, reliability, and sustainability. This work is essential to maintaining the watered canal experience in the lower five miles of canal through the Washington, DC portion into Georgetown. If this project were not completed, operations of the water flow into this section of the canal would be difficult.

What does the project include?

This project includes removing debris from the feeder channel - the gateway for water being diverted from the Potomac River into the historic canal. It includes repairs to critical water regulation structures such as the Guard Lock, Lock 1, 2, 5, and the Inlet Lock. It includes replacement of the bridge over the Inlet Lock and Lock 5. It includes repair of multiple historic stone walls along Level 4 of the canal in Georgetown.

Where will the project take place?

There will be multiple work sites along the canal in Washington, DC and the southernmost end of the park in Montgomery County, MD. The two primary work areas will be at the Feeder Channel, Guard Lock, Inlet Lock, and Lock 5 area (Mile 5) & the others main focus in Georgetown at the Level 4 walls, Lock 1, and Lock 2 (Mile 0.4-1).

When will the project begin and end?

The project began in February 2024 and is anticipated to continue through Winter 2025/2026, weather dependent.

How will this project impact park visitors?

The parking area at Lift Lock 5 along the Clara Barton Parkway will be closed for the duration of work in that area. Alternative parking is available at the Lock 6 parking area as well as other nearby Lock parking areas along the Clara Barton Parkway. Sections of the towpath in Georgetown will be closed with detours in place as shown in the above detour mapping.

How will this project benefit park visitors?

This project will result in a reliable water regulation system and resilient canal infrastructure that are preserved for current & future generations. It is vital to ensuring the long-term functionality of the historic structures throughout the lower five miles of the canal.

How will this project impact natural and cultural resources?

Every project the NPS executes undergoes review by a multidisciplinary team to ensure compliance with Section 106 of the National Historic Preservation Act (NHPA), National Environmental Policy Act (NEPA), and other federal, state, and local laws.

What is the park doing to protect those resources during the project?

NPS resource protection experts, engineers, and the contractor’s team will be monitoring the stone and towpath work along this stretch of the towpath, along with contractor’s operations and visitor safety team during the project with the goal of safely protecting the environment surrounding the project. Every project undertaken by the NPS is conducted in compliance with the National Environmental Protection Act (NEPA), the National Historic Preservation Act (NHPA), and other regulations.

How much does the project cost?

The construction contract was awarded in 2023 for $12.7 million and was funded from the National Park Service’s Line Item Construction Program.

Who can I contact if I have further questions regarding the project?

Additional questions are to be directed to the park headquarters at 301-739-4200.

 
Photo from inside lock 2. There is standing water and masonry walls framing image.
Lock 2, Looking Downstream

NPS | CHOH Professional Services Division

 
Photo of Lock 1 in Georgetown. There is shallow water in the canal, and masonry walls on either side of the canal.
Lock 1, Looking Upstream from Rock Creek

NPS | CHOH Professional Services Division

Last updated: March 4, 2024

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Contact Info

Mailing Address:

142 W. Potomac St.
Williamsport, MD 21795

Phone:

301-739-4200

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