Deweys Mills dam
Deweys Mills
Deweys Mills, located in Hartford, Vermont, is a hydroelectric dam situated on the Ottauquechee River. Built in 1900, this concrete dam stands at a height of 25 feet with a length of 395 feet, providing a storage capacity of 1000 acre-feet. The dam serves as a vital structure for harnessing hydropower in the region, with a primary purpose of hydroelectric generation.
Despite its age, Deweys Mills has a low hazard potential and its condition is currently rated as "Not Rated". The dam is under federal ownership and jurisdiction, with no state regulation or permitting required. The New England District of the US Army Corps of Engineers oversees the operations and maintenance of the dam, ensuring its safe and efficient functioning in generating clean energy for the surrounding community.
Although Deweys Mills has not been inspected since May 2000, it remains a key player in the renewable energy landscape of Vermont. With its historical significance and contribution to sustainable power generation, Deweys Mills stands as a testament to the enduring importance of water resources and climate-conscious infrastructure in the region.
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 Deweys Mills -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ottauquechee River At North Hartland | 658 cfs | → |
| Connecticut River At West Lebanon | 24,000 cfs | → |
| White River At West Hartford | 2,330 cfs | → |
| Ompompanoosuc River At Union Village | 16 cfs | → |
| Ottauquechee River Near West Bridgewater | 79 cfs | → |
| Sugar River At West Claremont | 1,190 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Deweys Mills.
Boat launches
- Connecticut River Boat Launch
- Mascoma Lake Boat Launch
- George Pond Boat Launch
- Crystal Lake Boat Launch
- Sanders Road Bethel
Campgrounds
- Quechee State Park
- Forest Campsite With Stream & Fire Ring
- Velvet Rocks Shelter
- Storrs Pond Rec Area
- Campsite 5
- Campsite 12
Fishing spots
Track Deweys Mills 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 Deweys Mills
Where does the data for Deweys Mills 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 Low 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 Deweys Mills.