Holbrook dam
Holbrook
Holbrook, located in Grafton, Vermont, is a privately owned dam on Weaver Brook that serves primarily for recreational purposes. Constructed in 1978 by Dufresne-Henry, this earth dam stands at a height of 14 feet and has a structural height of 16 feet, with a storage capacity of 87 acre-feet. With a drainage area of 0.49 square miles, the dam covers a surface area of 7 acres and is regulated by the Vermont Department of Environmental Conservation.
Despite its fair condition assessment as of June 2020, Holbrook poses a low hazard potential and undergoes inspections every 10 years. The dam has no outlet gates or locks and has not been modified in recent years. It is integral for maintaining the water supply for recreational activities in the area, and its location in Windham County, Vermont, makes it a key structure for water resource management and climate enthusiasts interested in the region.
As a significant part of the New England District's water infrastructure, Holbrook is an essential component for managing water resources in the area. Its construction and maintenance are crucial for ensuring the safety and sustainability of recreational activities and the surrounding ecosystem. With its historical significance and continued importance, Holbrook stands as a vital structure for water resource and climate enthusiasts seeking to understand the interconnectedness of water management and environmental conservation in Vermont.
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 Holbrook -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Williams River Near Rockingham Vt | 263 cfs | → |
| Saxtons River At Saxtons River | 19 cfs | → |
| Connecticut River At North Walpole | 30,200 cfs | → |
| Black River At North Springfield | 521 cfs | → |
| West River Below Townshend Dam Near Townshend | 46 cfs | → |
| West River At Jamaica | 628 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Holbrook.
Boat launches
- Connecticut River Boat Launch
- Ice House Road Londonderry
- Winhall Station Road Londonderry
- Lake Warren Boat Launch
- Gale Meadow Road Londonderry
Campgrounds
- Tree Farm Campground
- Horseshoe Acres Campground
- Jamaica State Park
- Townshend State Park
- Winhall Brook
- Hapgood Pond Recreation Area
Fishing spots
Paddle runs
- First Bridge Upstream On Route 100 To Confluence With West River
- Headwaters To First Bridge Upstream On Route 100
- Headwaters To Crossing Of Route 100 Near Route 155
- Headwaters To Confluence With West River (End Of Sherman Road)
- End Of Kendall Farm Road To Confluence With West River
- Headwaters To End Of Kendall Farm Road
Track Holbrook 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 Holbrook
Where does the data for Holbrook 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 Holbrook.