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People
Creators
- Uhland, Wilhelm Heinrich
- Ulke Bros., No. 1111 Penna Avenue, Washington, D.C.
- Union View Co.
- Union View Co., publisher
- United Souvenir and Apparel, Inc.; Traub, Sid, Photographer
- United States Department of Commerce, Bureau of the Census
- United States Department of the Interior, Bureau of Reclamation
- United States Environmental Protection Agency
- United States Environmental Protection Agency. Water Supply Division.
- United States Geological Survey
- United States Geological Survey - Water Resources Division
- United States Geological Survey Water Resources Division
- Universal Photo Service, Phila. PA
- Unknown
- Urban Engineers, Inc.
- Urban Environmental Consulting, Philadelphia Water Department
- URS / Madigan - Praeger, Inc. and Conklin & Rossant
- U. S. Army Corps of Engineers, Philadelphia District
- U. S. Army Engineer District Philadelphia
- U. S. Army Engineer District, Philadelphia
- U.S. Army Engineer Waterways Experiment Station
- U.S. Coast and Geodetic Survey
- U.S. Department of Health, Education and Welfare
- US Department of the Interior, National Park Service
- U. S. Department of the Interior / U. S. Geological Survey
- U. S. Environmental Protection Agency
- U. S. Fish & Wildlife Service and Environmental Protection Agency
- U. S. Geological Survey
- U.S. Geological Survey
- U.S. Geological Survey, Dept. of the Interior
- U.S. Pipe and Foundry Co.