The Department of Water Resources (DWR) conducts five manual snow surveys at Phillips Station in the Sierra Nevada from around the first of January through May each calendar year. The snowpack’s water content usually peaks around April 1, after which the sun’s higher position in the sky contributes to rapid melting and a diminished snowpack. DWR’s May 1 survey will be the last one of 2017. Frank Gehrke, chief of the California Cooperative Snow Surveys Program, will conduct the survey beginning at 11 a.m. just off Highway 50 near Sierra-at-Tahoe Road, about 90 miles east of Sacramento.