Protecting Our Water Resources; Is Drought the New Normal?
With the Summer Rain season in full swing, it’s easy to forget that we live in the desert. It’s also easy to forget that we are in a long-term drought. There have been two recent stories in the news about our strained water resources. Both stories discuss water flow in nearby Cienega Creek. KVOA offers NASA images capture Tucson – then and now. The Arizona Daily Star has an article called Cienega Creek, other S. AZ. streams, increasingly dry.
The drought raises questions. The biggest one is how in the world can we support mining in the Santa Rita and Patagonia Mountains given the huge amounts of water they consume? Rosemont’s supposed solution is using CAP water to recharge the aquifer. Whether it can be done and whether it will help is debatable. Regardless, Rosemont Copper can pump all the groundwater they want without the CAP recharge.
There are four other mining companies doing mineral explorations in the Patagonia Mountains. Arizona Mining Inc (Wildcat Silver), the one furthest along, estimated that their planned open pit mine would consume roughly 700,000 gallons of water per day. Per day! For comparison, the maximum pumping capacity of the Town of Patagonia’s well water is 110,000 gallons per day. Don’t forget the 3 other international mining companies that want to mine in the Patagonia Mountains. Using the figure of 700,000 gallons of water per day per mine results in 2.8 million gallons of water used per day. Big numbers need perspective.
Because all water sites seem to deal in acre feet, let’s do comparisons in those figures. 2.8 million gallons equals 8.6 acre feet. Estimated water usage from four mines per year using Arizona Mining Inc’s (Wildcat Silver) numbers comes out to 3,139 acre feet. The Santa Cruz Active Management Municipal Areas which includes Nogales, Rio Rico, Tubac, Arivaca, uses 7800 acre feet of water per year. That does not include Patagonia, Sonoita or Elgin. Mining in the Patagonia Mountains could potentially use almost half of all the water used annually in the most populated cities in Santa Cruz County.
Do we even have that much water? Is this drought the new normal?
Sources:
An Investigation of Energy Use, Water Supply and Wastewater Treatment at Patagonia, Arizona
