The gold mines that eventually became the Cripple Creek & Victor (CCV&V) gold mine were first founded in 1892. It is currently the largest producer of gold in Colorado and operates using heap leach processes to recover gold from the ore. ERC has assisted CC&V in their water management for the past several years, by means such as creating complex stochastic water balance models for different phases of the mining operations to help the mine understand their water availability and use it most efficiently. ERC has also designed diversion channels, stilling basins, and sediment ponds for mining conditions as well as runoff channels for closure conditions.