Water supply. Underground Underground rivers being tapped and put to use. Post Empire 0 6, 1968 p.36-37 Two new underground water sources for Colorado discovered, Supreme Court upheld authority f 1970 state water engineer to deny issuance of drilling permits if he determines wells will damage water rights of others. RMN Mr 20, 1973 p.62 unregulated exploratory drilling for enemy sources rni s?s concern for quality underground water. Post Mr 3, 1974 n.71