While Arizona water managers and affected stakeholders have been meeting almost daily over the past several months to finalize the state’s Drought Contingency Plan (DCP), plans have been underway on a parallel track for several years to ensure the framework is in place for the entire Colorado River Basin DCP.
Chronic, often severe drought in the Southwest is seriously straining the Colorado River system. With Lake Powell less than half full and Lake Mead below 40 percent of capacity, the seven Colorado River states are preparing to act should Lake Mead continue falling toward critical surface levels. At the same time, some states – including Arizona – are developing drought contingency plans supporting intrastate needs to contend with future Colorado River shortages.
Last week, the U.S. Bureau of Reclamation released drafts of the Upper Basin DCP and Lower Basin DCP documents. This gives the first glimpse at what will be included in the interstate agreement amongst the Upper Basin and Lower Basin states. These documents contain actions that are in addition to the provisions of the existing system-wide agreement, formally known as the Colorado River Interim Guidelines for Lower Basin Shortages and the Coordinated Operations for Lake Powell and Lake Mead.
According to the Bureau’s website:
- The Upper Basin DCP is designed to: a) protect critical elevations at Lake Powell and help assure continued compliance with the 1922 Colorado River Compact, and b) authorize storage of conserved water in the Upper Basin that could help establish the foundation for a Demand Management Program that may be developed in the future.
- The Lower Basin DCP is designed to: a) require Arizona, California and Nevada to contribute additional water to Lake Mead storage at predetermined elevations, and b) create additional flexibility to incentivize additional voluntary conservation of water to be stored in Lake Mead.
These documents show the interstate framework into which the intrastate (in our case, AZDCP) will fit. AZDCP work continues and we anticipate our intrastate implementation plan and framework will be completed by the end of November, prior to the December Colorado River Water Users Association meeting, at which point the entire plan will come together.