Marin Municipal Water District Photograph of Mount Tamalpais watershed
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Reservoirs
Marin's Primary Source of Water
 
Bon Tempe Reservoir
MMWD owns seven reservoirs that are the source of 75 percent of the water we use each year. These five reservoirs are on the Mt. Tamalpais Watershed: Phoenix, Lagunitas, Bon Tempe, Alpine and Kent. The other two, Nicasio and Soulajule, are in the grassy hills of West Marin.
 
 
Reservoir Capacities

 Reservoir

Capacity
in Acre Feet (1)

% of Total
Capacity

Year Built

Lagunitas

350

0.4

1872

Phoenix

411

0.5

1905

Alpine

8,891

11.2

1918 (2)

Bon Tempe

4,017

5.1

1948

Kent

32,895

41.3

1953 (3)

Nicasio

22,430

28.2

1960

Soulajule

10,572

13.3

1979

 TOTAL

 79,566

 100

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1 - One acre foot is 325,851 gallons, enough water to cover one acre (about the size of a football field) to a depth of one foot.
2 - Enlarged in 1924 and 1941.
3 - Enlarged in 1982.

For current reservoir storage levels, select the most recent PDF or Microsoft® Word document below.  (Click here for archives of past reports.)

Call 415-945-1533 for a recorded message of our weekly rainfall and reservoir storage information.


Documents
Water Watch August 29, 2010 (PDF)
Water Watch August 29, 2010 (Word)
Rainfall History at Lake Lagunitas (PDF)
Daily Rainfall at Lake Lagunitas - Fiscal Year 2010/11 (PDF)
Daily Rainfall at Lake Lagunitas - Fiscal Year 2009/10 (PDF)
   
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