Green River Dam dam
Green River Dam
The Green River Dam in Vermont stands as a testament to sustainable hydroelectric power generation and recreational opportunities. Completed in 1947, this arch-type dam reaches a height of 105 feet and spans 360 feet in length, with a storage capacity of 16,900 acre-feet. Situated on the Green River in Lamoille County, the dam is owned and regulated by the local government, with oversight from the Federal Energy Regulatory Commission.
With a hazard potential rated as high and a moderate risk assessment, the Green River Dam is a critical piece of infrastructure that requires regular inspection and maintenance. While it currently does not have a condition assessment available, emergency action plans have been prepared to ensure the safety of the surrounding community in case of a dam failure. The dam's uncontrolled spillway and rock foundation contribute to its structural integrity and ability to withstand high discharge levels.
For water resource and climate enthusiasts, the Green River Dam serves as a beacon of sustainable energy production and environmental stewardship. Its dual purposes of hydroelectric power generation and recreation highlight the importance of balancing human needs with environmental conservation. As a key feature in the New England District, this dam plays a vital role in meeting the region's energy demands while providing opportunities for outdoor activities in the scenic surroundings of Morrisville.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Green River Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Lamoille River At Johnson | 838 cfs | → |
| W Branch Little R Abv Bingham Falls Near Stowe | 20 cfs | → |
| Black River At Coventry | 335 cfs | → |
| Little River Near Waterbury | 340 cfs | → |
| Pope Brook (Site W-3) Nr. N. Danville | 9 cfs | → |
| North Branch Winooski River At Wrightsville | 285 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Green River Dam .
Boat launches
- Green River Dam Road Hyde Park
- Vt Route 15 E Morristown
- Wolcott Pond Road Wolcott
- Vt Route 100 Eden
- Cold Spring Lane Glover
- Nelson Pond Road Woodbury
Campgrounds
- Campsite #29
- Campsite #24
- Campsite #34
- Campsite #30
- Campsite #21 (Group Site)
- Campsite #22 (Out Of Service)
Track Green River Dam in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Green River Dam
Where does the data for Green River Dam come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Green River Dam .