A study has been made of the need for and value of storage in Caldwell and Corbin Reservoirs for water quality control purposes in the Chikaskia River basin. The investigation revealed an immediate need for water quality improvement in Bluff Creek downstream from the Caldwell Reservoir site. Anticipated seepage losses from this reservoir will be adequate to maintain satisfactory water quality for expected uses and have attributable value. No need was found for storage for water quality control purposes in either reservoir. Future municipal and industrial water uses, used as the basis for estimating waste releases for this study, were provided by the Bureau of Reclamation with the exception of those projected for the Blackwell area which were adapted from a previous Public Health Service study. (Author)