Hanes & Bontecou Marsh Dam Dam
Hanes & Bontecou Marsh Dam
Hanes & Bontecou Marsh Dam, located in Millbrook, New York, is a privately owned structure regulated by the New York State Department of Environmental Conservation. Built in 1956, this earth dam stands at a height of 7 feet and has a length of 350 feet, with a storage capacity of 75 acre-feet. The dam serves a primary purpose of "Other" and is designed to control the flow of TR-SHAW BROOK, with a maximum discharge capacity of 152 cubic feet per second.
Despite being rated as having a low hazard potential, the dam's condition has not been assessed since its last inspection in August 1994. It is important to note that the risk associated with the dam is considered moderate, with a risk assessment value of 3. With a spillway width of 58 feet and uncontrolled spillway type, the dam plays a crucial role in managing water resources in the area. While emergency action plans and risk management measures for the dam are not specified in the data, its presence underscores the importance of sustainable water resource management in the face of climate change.
As climate enthusiasts and water resource stakeholders, understanding the operational status and maintenance needs of dams like Hanes & Bontecou Marsh Dam is crucial for ensuring the safety and efficiency of water infrastructure. With a focus on regulatory compliance, regular inspections, and risk assessment, we can work towards enhancing the resilience of our water systems in the face of changing climate patterns and increasing water demands.
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 Hanes & Bontecou Marsh Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Tenmile River Near Gaylordsville | 60 cfs | → |
| Housatonic River At Gaylordsville | 449 cfs | → |
| Salmon Creek At Lime Rock | 9 cfs | → |
| Wappinger Creek Near Wappingers Falls Ny | 30 cfs | → |
| Housatonic River At Falls Village | 288 cfs | → |
| Shepaug River At Peters Dam At Woodville | 20 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hanes & Bontecou Marsh Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Hanes & Bontecou Marsh Dam
Where does the data for Hanes & Bontecou Marsh 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 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 below 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.
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.