California releases results from fifth and final snowpack survey

The California Department of Water Resources announced the results from its fifth and final snowpack survey May 1. The survey confirmed the snowpack’s low water content, which will affect water and power deliveries in California this year.

Overall, the average water content of California’s snowpack was 40 percent of normal. The relative composition of the Sierra Nevada snowpack, from which Western’s Central Valley Project relies on to fill reservoirs and generate hydropower, was 70 percent of normal for the northern Sierras, 35 percent of normal for the central Sierras and 20 percent of normal for the southern Sierras.

Last year’s snowpack water content state-wide was 190 percent of normal by this time, which will reduce the impact of the scarce snowpack this year.

“The impact of a below-normal water year has been somewhat mitigated by above-average reservoir storage levels due to unusually wet conditions during the 2010-2011 operating season,” said Sierra Nevada Power Marketer Sonja Anderson.

However, operators of both the state and Federal water projects have already announced reduced water and power deliveries for the upcoming year, including from Western’s Central Valley Project.