AWWA JAW26656

The interconnection of reservoirs through pumped-water or gravity interties can lead to cost savings and increased system safe yield. The city of Columbus, Ohio constructed a 3.8-mi pipeline from Alum Creek Reservoir, owned by the US Army Corps of Engineers, to Hoover Reservoir, a city-owned water supply source. Through careful timing of the transfer of water from Alum Creek Reservoir to Hoover Reservoir, an increase of 34.3 mgd in the safe yield of Hoover Reservoir is achieved with an average pumpage of only 22.5 mgd. Because transferred water and Hoover Reservoir water cost less to treat than alternative sources, a net savings of $695,135 per year is realized in total water system operating costs. Includes 5 references, tables, figures.