Thanks to heavy overnight rainfall, the Marin Municipal Water District’s seven water supply reservoirs have reached 100 percent capacity. Water is now flowing over the spillway at Kent Lake, the district’s largest reservoir and the last to fill.
This is only the third time in 20 years that the reservoirs have been filled to capacity in December. The other years were 1996 and 2005. Historically, the reservoirs have averaged about 70 percent capacity at this time of year.
About 3 1/2 inches of rainfall was recorded overnight at Lake Lagunitas. Year-to-date rainfall is 29 inches and almost 160 percent of normal. So far, the wet weather is outpacing last year’s rainfall: At this time last year, Lake Lagunitas had received about 17 inches of rain and the reservoirs were at 57 percent capacity.
The total combined capacity of the district’s reservoirs is 79,566 acre-feet (one acre-foot equals 325,851 gallons). The reservoirs are the primary source of drinking water for 195,000 residents of central and southern Marin County.