Z--CHOH 245002/287711 - Rehabilitate Canals 1, 2, and 5 and Georgetown Wall

This project will rehabilitate canal Lift Locks 1 and 2 in Georgetown and the river, as well as the Inlet Lock 1 complex, which includes canal Lift Lock 5. Rehabilitation work will address critical elements. This project will replace lock gates, timber sills, and associated hardware. Necessary masonry repairs will be accomplished to stabilize the structures, including repointing work to regain water tightness. This also reconstructs several historic stone masonry retaining walls on Level 4 of the Chesapeake and Ohio Canal located in Georgetown (Washington, D.C.). Many of these walls have privately owned and occupied structures on top or adjacent to them. This project will dismantle and rebuild the canal walls in selected areas to assure their structural integrity and in some cases the integrity of structures on and adjacent to them. Through wall drain systems will be added behind the reconstructed masonry walls to relieve hydrostatic pressure. Minor railing and hardscaped surfaces will be removed and reinstalled at the conclusion of the construction. The project will require temporary scaffolding and temporary support of excavation walls to execute the reconstruction. The canal prism will be de-watered for the duration of the project to facilitate site access. The canal prism will be restored at the conclusion of the project and re-watered.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Cast-in-Place Concrete.
Division 04 -	Masonry, Common Work Results for Masonry, Masonry Mortaring, Unit Masonry.
Division 22 -	Plumbing, Plumbing Piping, Plumbing Equipment.
Division 26 -	Electrical, Instrumentation and Control for Electrical Systems.
Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Water Utilities, Water Utility Distribution Piping, Water Utility Distribution Equipment, Water Utility Pumping Stations, Wells, Storm Drainage Utilities, Ponds and Reservoirs.
Division 35 -	Waterway and Marine Construction, Shoreline Protection, Waterway Construction and Equipment.
Division 44 -	Pollution and Waste Control Equipment, Water Pollution Control Equipment.