Lake Merwin

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Lake Merwin
Aerial view of Lake Merwin in Washington (35085174512).jpg
Aerial view of Lake Merwin
LocationClark / Cowlitz counties, Washington, United States
Coordinates45°59′N 122°28′W / 45.983°N 122.467°W / 45.983; -122.467Coordinates: 45°59′N 122°28′W / 45.983°N 122.467°W / 45.983; -122.467[1]
Primary inflowsLewis River
Primary outflowsLewis River
Catchment area731 square miles (1,890 km2)[2]
Basin countriesUnited States
Surface area3,921 acres (15.9 km2)[2]
Max. depth190 m (620 ft)[3]
Water volume422,400 acre feet (0.521 km3)[4]
Shore length132 mi (51 km)[3]
1 Shore length is not a well-defined measure.

Lake Merwin is a reservoir on the Lewis River in the U.S. state of Washington. It lies on the border between Clark County and Cowlitz County. It was created in 1931 with the construction of Merwin Dam.[2]

See also[edit]


  1. ^ a b U.S. Geological Survey Geographic Names Information System: Lake Merwin
  2. ^ a b c d Merwin Dam Archived 2011-07-16 at the Wayback Machine, NPDP Dam Directory
  3. ^ a b "Merwin Lake -- Clark County". Department of Ecology, State of Washington. Retrieved 20 December 2014.
  4. ^ "Reservoirs in the United States" (PDF). United States Geological Survey. Retrieved 20 December 2014.