Dam Report

Bethel Mills dam

Vermont, USA Third Branch White River Hazard Low
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Tonight low
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Dam height
17ft
Hazard rating
Low
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Bethel Mills -- None dam
Bethel Mills None · Third Branch White River
About this dam

Bethel Mills

Bethel Mills, a private hydroelectric dam located in Bethel, Vermont, harnesses the power of the Third Branch White River for energy production. Constructed in 1941 by designer Ray Durfee, this concrete gravity dam stands at a height of 17 feet and has a hydraulic height of 15 feet. With a storage capacity of 51 acre-feet and a drainage area of 137.97 square miles, Bethel Mills plays a crucial role in the local water resource management system.

Despite its age, Bethel Mills has a low hazard potential and has not been rated for its current condition. The dam, with a length of 150 feet and surface area of 10 acres, serves as a key infrastructure for the surrounding area. However, it has not been subject to recent inspections or maintenance, as the last inspection was carried out in May 1999. With no state regulation or permitting in place, Bethel Mills operates independently for hydroelectric purposes.

Although Bethel Mills has not been updated or modified in recent years, its contribution to the local energy supply and water management cannot be understated. As a historic dam that has stood the test of time, Bethel Mills continues to provide renewable energy and environmental benefits for the community. Its location within the picturesque Windsor County, Vermont, makes it a significant landmark for water resource and climate enthusiasts to appreciate and learn from.

StateNone
River / streamThird Branch White River
NID IDVT00190
Owner typePrivate
Primary purposeHydroelectric
Dam typeConcrete
Year built1941
Dam height17 ft
Dam length150 ft
Max storage51 AF
Surface area10.0 ac
Drainage area138.0 sq mi
Hazard potentialLow
ConditionNot Rated
Last inspectionThu, 27 May 1999 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Bethel Mills -- inflows here typically show up in storage 24-72 hours later.

Track Bethel 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.

FAQ

About Bethel Mills

Where does the data for Bethel 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.