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Utility Layout Plans are prepared by the Branch of Engineering to supplement the Developed Area Plans. They should record in detail the kind and location of all existing and proposed utilities necessary to the operation and development of the area.

The Utility Layout Plans are made at the scale of their corresponding Developed Area Plans and should show all building, road and trail layouts. When the quantity of utility data to be shown is not large a separate plan is not required; in such cases the data may be placed on the Developed Area Plan provided legibility is not sacrificed.

Where the locations of the sources of water and power supply or of sewage disposal fall beyond the limits of the drawing, proper explanatory notations or small scale insert maps should be included.

Standard Symbols are used to indicate in detail the LAYOUTS and APPURTENANCES of the following:

The Water System
Including location of source of supply and storage facilities.

The Power System
Including location of source of supply.

The Sewerage System
Including location of disposal area.

The Telephone System

Miscellaneous Utilities
Garbage disposal facilities, gas installations, drainage and water control facilities.

The Branch of Engineering is responsible for the accuracy of the utilities data shown on these plans.

Please note that the language and terminology used in this collection reflects the context and culture of the time of its creation, and may include culturally sensitive information. As an historical document, its contents may be at odds with contemporary views and terminology. The information within this collection does not reflect the views of the Smithsonian Institution, but is available in its original form to facilitate research. For questions or comments regarding sensitive content, access, and use related to this collection, please contact