Rapid Creek (Cheyenne River)
Rapid Creek | ||
Rapid Creek at Founders Park in Rapid City |
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Data | ||
Water code | US : 1267033 | |
location | South Dakota ( USA ) | |
River system | Mississippi River | |
Drain over | Cheyenne River → Missouri River → Mississippi River → Gulf of Mexico | |
Confluence of | North Fork and South Fork Rapid Creek 44 ° 7 ′ 52 ″ N , 103 ° 44 ′ 10 ″ W. |
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Source height | 1635 m | |
muzzle |
Cheyenne River Coordinates: 43 ° 54 ′ 16 " N , 102 ° 37 ′ 45" W 43 ° 54 ′ 16 " N , 102 ° 37 ′ 45" W. |
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Mouth height | 744 m | |
Height difference | 891 m | |
Bottom slope | 6.5 ‰ | |
length | 138 km | |
Catchment area | approx. 1840 km² | |
Discharge at the Farmingdale A Eo gauge : 1562 km² Location: 36 km above the estuary |
MQ 1964/2016 Mq 1964/2016 |
2.3 m³ / s 1.5 l / (s km²) |
Left tributaries | Deer Creek | |
Right tributaries | Castle Creek | |
Reservoirs flowed through | Pactola Lake , Canyon Lake | |
Medium-sized cities | Rapid City | |
Communities | Rapid Valley, Green Valley |
The Rapid Creek is a left tributary of the Cheyenne River in the southwest of the US state of South Dakota .
River course
Rapid Creek arises in the Black Hills at the confluence of its two headwaters, North Fork and South Fork Rapid Creek . The river flows through the mountains in an easterly direction. After about 25 km it is dammed up to Pactola Lake . After another 25 km, the river leaves the hill country and reaches the town of Rapid City at the foot of the Black Hills . In Rapid City is the small reservoir Canyon Lake . After leaving the city, the Rapid River flows mainly in an east-south-east direction through the plains, with a strongly meandering behavior. About 50 km east-southeast of Rapid City, the Rapid Creek finally flows into the Cheyenne River.
Hydrology
The Rapid Creek has a catchment area of about 1840 km². The mean discharge 36 km above the mouth is 2.3 m³ / s. The annual runoff can vary greatly.
history
On June 9, 1972, the Canyon Lake dam burst , in which the city of Rapid City was partially flooded.