Echo Lake Dam dam
Echo Lake Dam
Echo Lake Dam, located in Hopkinton, Massachusetts, was completed in 1898 and stands at a height of 41 feet. This masonry dam, primarily used for water supply purposes, spans 150 feet across the Charles River. With a high hazard potential and a satisfactory condition assessment as of April 2017, the dam is regulated by the Department of Conservation and Recreation and undergoes regular inspections and enforcement to ensure its safety and functionality.
The dam's maximum storage capacity is 1946 acre-feet, with a normal storage of 1856 acre-feet and a drainage area of 1.38 square miles. Despite its uncontrolled spillway type, the dam has a moderate risk assessment rating of 3 and a hydraulic height of 30 feet. The surrounding area of Echo Lake Dam covers 122.4 acres, providing a vital water source while posing potential risks that are managed through rigorous risk assessment and safety measures in place.
Owned privately, Echo Lake Dam plays a crucial role in water resource management in the Middlesex County area of Massachusetts. With its historical significance and continued importance in providing water supply, the dam serves as a reminder of the intricate balance between harnessing natural resources and ensuring the safety and sustainability of water infrastructure amid changing climate conditions.
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 Echo Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Charles River At Medway | 68 cfs | → |
| Blackstone River At Northbridge | 1,000 cfs | → |
| West River Below West Hill Dam | 1 cfs | → |
| Lake Cochituate Outlet At Framingham | 24 cfs | → |
| Quinsigamond River At North Grafton | 15 cfs | → |
| Sudbury River At Saxonville | 124 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Echo Lake Dam.
Boat launches
- West Main Street 209, Hopkinton
- Ashland State Park Boat Launch
- Cedar Street 154-180, Hopkinton
- Wood Street 291-299, Hopkinton
- Lakeview Avenue 98, Framingham
- Lake Street Sherborn
Track Echo Lake Dam 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 Echo Lake Dam
Where does the data for Echo Lake 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 High 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 Echo Lake Dam.