Washington Aqueduct. Specifications for Conduit [and] Specification For Graduation on Section No. [blank] of the Washington Aqueduct.

The construction of the Washington Aqueduct was done under the supervision of Montgomery C. Meigs of the U. S. Army Corps of Engineers. As seen..... Read More about Washington Aqueduct. Specifications for Conduit [and] Specification For Graduation on Section No....