Dossier #2269 · GRanD 67
Mt. St. Helens Sediment Retention Structure
🇺🇸United States · Toutle River River
Built 1988 · Dam · data quality: Fair
Flood control ★
Reservoir outline · simplified
Specifications
- Height
- 73 m
- Crest length
- 549 m
- Reservoir capacity
- 155.4 MCM
- Reservoir area
- 1.8 km²
- Average depth
- 85.9 m
- Catchment
- 371 km²
- Avg discharge
- 18,074 L/s
- Elevation
- 288 masl
- Degree of regulation
- 27.3 %
Notes
Built 1988
Provenance
Record 2269 of the Global Dam Watch v1.0 database (CC BY 4.0), original source: GRanD, year via GRanD. Coordinates are river-snapped: 46.3631, -122.5469.