Coulee Dam is a town in
Douglas,
Grant, and
Okanogan counties in the state of
Washington. The Douglas County portion of Coulee Dam is part of the
Wenatchee–
East Wenatchee Metropolitan Statistical Area. The population was 1,211 as of the
2020 census.
History

Coulee Dam was founded by the U.S.
Bureau of Reclamation
The Bureau of Reclamation, formerly the United States Reclamation Service, is a List of United States federal agencies, federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it ...
in 1933, to serve as headquarters for the construction of the
Grand Coulee Dam. The Okanogan County portion was known as Mason City, location of the head contractor. The portions in Douglas and Grant Counties were known as Engineers Town and were government-owned. In 1942, with the end of the contract in sight, CBI transferred control of Mason City to the Municipal Division of the Columbia Basin Project. In 1948, Mason City was incorporated into Coulee Dam. The government began the process of selling the town to the public in 1957, finishing in 1959. Coulee Dam was officially incorporated as a town on February 26, 1959.
It is the headquarters of
Lake Roosevelt National Recreation Area and home to one of the world's largest man-made piles of sand, a , -high hill remaining from dam construction.
Geography
The
Okanogan County portion lies within the
Colville Indian Reservation
The Colville Indian Reservation is an Indian reservation located in Washington (state), Washington state, U.S. It is inhabited and managed by the Confederated Tribes of the Colville Reservation, which are List of federally recognized tribes in ...
, and forms the southern limit of the
Okanogan Highlands.
According to the
United States Census Bureau
The United States Census Bureau, officially the Bureau of the Census, is a principal agency of the Federal statistical system, U.S. federal statistical system, responsible for producing data about the American people and American economy, econ ...
, the town has a total area of , of which, is land and is water.
Climate
This
climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the
Köppen Climate Classification
The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (te ...
system, Coulee Dam has a
humid continental climate
A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers, and cold ...
, abbreviated "Dfb" on climate maps.
Climate Summary for Coulee Dam, Washington
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Demographics
2010 census
As of the 2010 census, there were 1,098 people, 459 households, and 301 families living in the town. The population density was . There were 534 housing units at an average density of . The racial makeup of the town was 55.0% White
White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...
, 0.5% African American
African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...
, 35.5% Native American, 0.7% Asian, 2.4% from other races, and 5.9% from two or more races. Hispanic
The term Hispanic () are people, Spanish culture, cultures, or countries related to Spain, the Spanish language, or broadly. In some contexts, Hispanic and Latino Americans, especially within the United States, "Hispanic" is used as an Ethnici ...
or Latino of any race were 6.7% of the population.
There were 459 households, of which 29.8% had children under the age of 18 living with them, 42.9% were married couples living together, 15.7% had a female householder with no husband present, 7.0% had a male householder with no wife present, and 34.4% were non-families. 30.5% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.93.
The median age in the town was 41.6 years. 24.8% of residents were under the age of 18; 5.7% were between the ages of 18 and 24; 23.1% were from 25 to 44; 28.8% were from 45 to 64; and 17.5% were 65 years of age or older. The gender makeup of the town was 49.9% male and 50.1% female.
2000 census
As of the 2000 census, there were 1,044 people, 448 households, and 305 families living in the town. The population density was 1,532.5 people per square mile (592.8/km2). There were 499 housing units at an average density of 732.5 per square mile (283.3/km2). The racial makeup of the town was 64.56% White
White is the lightest color and is achromatic (having no chroma). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully (or almost fully) reflect and scatter all the visible wa ...
, 0.29% African American
African Americans, also known as Black Americans and formerly also called Afro-Americans, are an Race and ethnicity in the United States, American racial and ethnic group that consists of Americans who have total or partial ancestry from an ...
, 29.12% Native American, 0.48% Asian, 0.57% from other races, and 4.98% from two or more races. Hispanic
The term Hispanic () are people, Spanish culture, cultures, or countries related to Spain, the Spanish language, or broadly. In some contexts, Hispanic and Latino Americans, especially within the United States, "Hispanic" is used as an Ethnici ...
or Latino of any race were 2.78% of the population.
There were 448 households, out of which 25.7% had children under the age of 18 living with them, 52.0% were married couples living together, 11.4% had a female householder with no husband present, and 31.7% were non-families. 27.7% of all households were made up of individuals, and 13.8% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.74.
In the town, the population was spread out, with 22.9% under the age of 18, 7.1% from 18 to 24, 20.7% from 25 to 44, 29.0% from 45 to 64, and 20.3% who were 65 years of age or older. The median age was 44 years. For every 100 females, there were 93.3 males. For every 100 females age 18 and over, there were 90.3 males.
The median income for a household in the town was $37,391, and the median income for a family was $45,066. Males had a median income of $38,000 versus $22,500 for females. The per capita income for the town was $18,791. About 6.7% of families and 9.8% of the population were below the poverty line, including 14.9% of those under age 18 and 11.0% of those age 65 or over.
Notable person
* Lawrence Colburn, born in Coulee Dam, one of three people to have intervened in the My Lai massacre
References
{{Authority control
Towns in Douglas County, Washington
Towns in Grant County, Washington
Towns in Okanogan County, Washington
Towns in Washington (state)
Wenatchee–East Wenatchee metropolitan area
Populated places in the Okanagan Country
Washington (state) populated places on the Columbia River
Company towns in Washington (state)