Correspondence, site maps. Correspondence between UP engineers regarding construction of rail bridge across Los Angeles River continued. Includes Los Angeles train yard maps and Los Angeles river hydraulic analysis and flood control for SP and UP bridges.

Correspondence, site maps. Correspondence between UP engineers regarding construction of rail bridge across Los Angeles River continued. Includes work order authority for construction of LA & SR bridge, Also includes maps of possible track routes, bridge pier and abutment locations, elevation and section of proposed bridge, and proposed drainage system at Mission Tower.

Correspondence, site maps. Correspondence between UP engineers regarding construction of rail bridge across Los Angeles River continued. Includes correspondence regarding City of Los Angeles flood control projects. Also includes several maps, including map of general track plan.

Correspondence. Correspondence with several bridge building companies regarding construction of bridge over Los Angeles River.

Correspondence. Correspondence regarding construction of bridge over Los Angeles River at Alhambra Ave. Letters from LAUPT (primarily L. T. Jackson, UP Joint Facility Engineer) soliciting bids from contractors, discussion of selection of contractor, bridge specifications, permits from City of Los Angeles. Site map.

Blueprints. Blueprints for Alhambra Ave. bridge.

Contract, brochures. Contract between UP and L. W. O'Dell for construction of Alhambra Ave. bridge substructure over Los Angeles River. Includes brochures outlining UP's specifications for steel concrete reinforcement bars, preservation of wood, and concrete and reinforced concrete.

Blueprint. Blueprint of Alhambra Ave. bridge and track layout.

Contract. Contract between UP and American Bridge Co. for construction of Alhambra Ave bridge superstructure over Los Angeles River. Includes brochures outlining UP's specifications for steel railway bridges and paint for structural steel work.

Blueprints. Blueprints for North retaining wall.