Truckee/Carson TROA Operations and Accounting Model

Precision partnered with the US District Court Federal Water Master/TROA Administrator to utilize, maintain, and develop a RiverWare® modeling system for the Truckee Carson Basins. This modeling system is the principal tool for administration of the Truckee River Operating Agreement (TROA), which became operational on December 1st, 2015. TROA is an innovative, flexible, accounting based operating agreement for the Truckee River Basin in California and Nevada. The model performs the official accounting of the system, it provides hydrologic forecasts, and performs operational forecasting as well as facilitates the collective operation of the basin by the stakeholders. The system also has the capability to utilize the River Forecast Center’s “Ensemble Streamflow Prediction” (ESP) forecasts to provide basin stakeholders with estimates in uncertainty in the future condition of the system to support probabilistic decision making.  Precision actively worked on this project for over 12 years.