Client
US Department of the Interior, National Park Service
Location
Dickerson, Maryland
Key Challenges & Project Details
- Stabilize the historic C & O Canal Stone Arch Aqueduct over the Monocacy River, originally constructed in 1833
- Work included stone masonry repairs to the aqueduct using specialized cementitous pressurized grouting stabilization methods
- Scour repair
- Removed temporary bracing system
- Removed prism fill and restored prism walls
- Poured structural slab and decorative topping slab
- Removed and replaced coping stones
- Replaced mule rail and ornamental fencing
- With JMT, Corman overcame grouting issues by re-designing a new grouting method involving removal of the arch fill (in sequence) and replacement with a tie rod system and flowable fill
- Corman’s new grouting method was completed in 6 months at no extra cost to the National Park Service and afforded clear evidence of structural stability
- Pedestrian traffic was maintained on the structure during the entire project
Design Partner
Johnson, Mirmiran and Thompson (JMT)
