Faced with a challenging decision between draining Apache Lake or trying a unique underwater diving method to repair the damaged intake structure for Horse Mesa Dam’s hydroelectric units, Hydro Generation engineers at Salt River Project chose the latter rather than the former, which would have significantly impacted marina operations as well as boating enthusiasts at the reservoir. SRP said that decision is about to be rewarded as construction workers from SRP and Seattle-based Global Diving & Salvage Inc.