102 River Tributaries Dam 21
102 River Tributaries Dam 21 is an earth dam located in Nodaway County, Missouri, built in 1962. It carries a Low hazard potential classification.
About 102 River Tributaries Dam 21
The primary purpose of 102 River Tributaries Dam 21 is grade stabilization. Grade stabilization dams prevent erosion by reducing the slope and velocity of water flowing through a channel. They're commonly used to stop gullies from deepening and to protect downstream land and infrastructure. The dam is owned by 102 Rvr Trib Wrsd Subdis (local government). It impounds the Tr-thill Branch near Arkoe.
The dam stands 34 feet tall and stretches 395 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 33 acre-feet, and collects water from a drainage area of 358 square miles. Completed in 1962, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
At 34 feet, this dam is taller than 80% of dams nationwide.
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Location
| State | Missouri |
| County | Nodaway |
| Nearest City | Arkoe |
| River/Stream | Tr-thill Branch |
| Coordinates | 40.36293, -94.80803 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 32 ft |
| Dam Length | 395 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 33 acre-ft |
| Max Storage | 33 acre-ft |
| Normal Storage | 19 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 358 sq mi |
| Max Discharge | 386 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Grade Stabilization |
| Owner | 102 RVR TRIB WRSD SUBDIS |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MO10176 |
| Federal ID | MO10176 |
| More Info | State Dam Safety Program |