3 August 1998
1-1. PURPOSE AND SCOPE. This document provides guidance for selecting water sources,
determining water requirements for Army and Air Force installations including special projects,
and developing suitable sources of supply from ground or surface sources.
1-2. APPLICABILITY. These instructions are applicable to all USACE elements engaged in
the selection of water sources and planning and designing supply systems.
1-3. REFERENCES. Appendix A contains a list of references used in these instructions.
a. General definitions. The following definitions, relating to water supplies, are
(1) Water works. All construction (structures, pipe, equipment) required for the
collection, transportation, pumping, treatment, storage and distribution of water.
(2) Supply works. Dams, impounding reservoirs, intake structures, pumping stations,
wells and all other construction required for the development of a water supply source.
(3) Supply line. The pipeline from the supply source to the treatment works or
(4) Treatment works. All basins, filters, buildings and equipment for the conditioning of
water to render it acceptable for a specific use.
(5) Distribution system. A system of pipes and appurtenances by which water is
provided for domestic and industrial use and fire fighting.
(6) Feeder mains. The principal pipelines of a distribution system.
(7) Distribution mains. The pipelines that constitute the distribution system.
(8) Service line. The pipeline extending from the distribution main to building served.
(9) Effective population. This includes resident military and civilian personnel and
dependents plus an allowance for nonresident personnel, derived as follows: The design
allowance for nonresidents is 190 L (50 gal)/person/day whereas that for residents is 570 L
(150 gal)/person/day. Therefore, an "effective-population" value can be obtained by adding
one-third of the population figure for nonresidents to the figure for residents.