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Gunbarrel, Colorado
Gunbarrel Commons Park in Gunbarrel.
Gunbarrel Commons Park in Gunbarrel.
Location of the Gunbarrel CDP in Boulder County, Colorado.
Location of the Gunbarrel CDP in Boulder County, Colorado.
Country  United States
State  Colorado
County Boulder County
Founded 1965
Government
 • Type unincorporated community
Area
 • Total 6.309 sq mi (16.340 km2)
 • Land 6.249 sq mi (16.185 km2)
 • Water 0.060 sq mi (0.155 km2)
Elevation
5,285 ft (1,611 m)
Population
 (2010)
 • Total 9,263
 • Density 1,482/sq mi (572/km2)
Time zone UTC-7 (MST)
 • Summer (DST) UTC-6 (MDT)
ZIP Code
Boulder 80301
Niwot 80503
Area codes 303 & 720
GNIS feature Gunbarrel CDP

Gunbarrel is an unincorporated community and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The population of the Gunbarrel CDP was 9,263 at the United States Census 2010. The Boulder post office (Zip Code 80301) and Niwot post office (Zip Code 80503) serve the area.

Geography

Gunbarrel is located at 40°3′56″N 105°11′15″W / 40.06556°N 105.18750°W / 40.06556; -105.18750 (40.065482, -105.187523). It is northeast of the city of Boulder proper, separated by a buffer area of private agricultural lands and publicly owned open space. The buffer areas provide over two miles (3 km) of separation over changing elevations. This reduces the impact of the Boulder Municipal Airport and the Boulder County Sheriff's Department facilities (including the county jail), which are located on the southern side of the buffer.

Two reservoirs operated by the Boulder and Left Hand Irrigation Company are located in central Gunbarrel. Irrigation ditches and canals, including the Boulder and Whiterock Ditch, pass though this primarily residential area. The Twin Lakes Open Space, a large park which includes the two reservoirs and extends west along the ditch, is operated by the Boulder County Parks and Open Space Department. The park brings protected wetlands, jogging trails and green spaces directly into the urban area. The City of Boulder operates Eaton Park, adjacent to the west lake. Eaton Park includes picnic facilities, BMX jumps and additional protected wetland. Flood control facilities are integral to the reservoir and canal systems, but they do not eliminate the flood risk to adjacent development.

According to the United States Census Bureau, the CDP has a total area of 6.4 square miles (17 km2), of which, 6.4 square miles (17 km2) of it is land and 0.04 square miles (0.10 km2) of it (0.47%) is water.

Natural hazards

The principal natural hazard in Gunbarrel is flooding. The county Transportation Department provides floodplain information through an online request page, free of charge for property owners in the unincorporated areas of the county, including Gunbarrel. Boulder County participates in the National Flood Insurance Program which allows some reduction in the cost of flood insurance for residents.

Climate

Climate data for Gunbarrel, Colorado
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Average high °F (°C) 46
(7.8)
49
(9.4)
56
(13.3)
63
(17.2)
72
(22.2)
81
(27.2)
86
(30)
85
(29.4)
77
(25)
65
(18.3)
54
(12.2)
46
(7.8)
65
(18.3)
Average low °F (°C) 22
(-5.6)
23
(-5)
29
(-1.7)
36
(2.2)
44
(6.7)
51
(10.6)
56
(13.3)
55
(12.8)
47
(8.3)
38
(3.3)
28
(-2.2)
22
(-5.6)
38
(3.3)
Source: Accuweather

Demographics

The United States Census Bureau initially defined the Gunbarrel CDP for the 1980 United States Census.

Gunbarrel CDP, Colorado
Year Pop. ±%
1980 5,172 —    
1990 9,388 +81.5%
2000 9,435 +0.5%
2010 9,263 −1.8%
2020 —    
Source: United States Census Bureau

Transportation

The 205 bus of the RTD bus system gives service throughout Gunbarrel and into Boulder. Roads and streets in Gunbarrel are maintained by Boulder County. The RTD regional route J also provides a peak hours connection to the University of Colorado and Longmont.

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