Spillway Dam At Neponset St. dam
Spillway Dam At Neponset St.
The Spillway Dam at Neponset St. in Canton, Massachusetts is a significant structure regulating the flow of the East Branch Neponset River for recreational purposes. Managed by the Department of Conservation and Recreation, this masonry dam stands at a height of 11.5 feet with a hydraulic height of 10 feet. The dam has a storage capacity of 14.9 acre-feet and covers a surface area of 4 acres, serving as a focal point for water resource management in the region.
With a significant hazard potential and fair condition assessment, the Spillway Dam presents a moderate risk level according to a risk assessment conducted. While the dam has not undergone recent modifications, it is subject to inspection every five years to ensure its structural integrity and operational effectiveness. The dam's uncontrolled spillway type and proximity to the East Branch Neponset River highlight its importance in managing water flow and mitigating potential risks in the area.
As a state-regulated structure with a designated emergency action plan, the Spillway Dam at Neponset St. plays a crucial role in water resource management and climate resilience efforts in Norfolk County, Massachusetts. Its presence along the East Branch Neponset River underscores the intersection of recreational use and environmental conservation, making it a key asset for both local communities and the broader ecosystem.
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 Spillway Dam At Neponset St. -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| East Branch Neponset River At Canton | 25 cfs | → |
| Neponset River At Norwood | 21 cfs | → |
| Neponset River At Greenlodge St Near Canton | 85 cfs | → |
| Mother Brook At Dedham | 88 cfs | → |
| Charles River At Dover | 157 cfs | → |
| Neponset River At Milton Village | 194 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Spillway Dam At Neponset St..
Boat launches
- Beach Street Sharon
- Ames Street Dedham
- Providence Highway 267, Dedham
- Town Street 128, Braintree
- Needham Street 511, Dedham
- Randolph Street 315, Weymouth
Track Spillway Dam At Neponset St. 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 Spillway Dam At Neponset St.
Where does the data for Spillway Dam At Neponset St. 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 Significant 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 Spillway Dam At Neponset St..