Grandin Reservoir Dam dam
Grandin Reservoir Dam
Located in Northfield, Massachusetts, the Grandin Reservoir Dam is a privately owned structure regulated by the Department of Conservation and Recreation. Completed in 1935, this earth dam stands at a height of 37 feet and serves primarily as a water supply for the area. With a storage capacity of 104 acre-feet and a normal storage level of 86 acre-feet, the dam plays a crucial role in managing water resources in the region.
The dam, situated on Louisiana Brook, has a spillway type of "Uncontrolled" and a hazard potential rated as "High." Despite this, the condition assessment as of May 2018 was deemed "Satisfactory." The dam has a moderate risk assessment rating of 3, and emergency action plans have been prepared, though last revised in 2013. The structure is inspected biennially to ensure its safety and compliance with regulatory standards.
With its historical significance dating back to the 1930s and its ongoing role in water supply and management, the Grandin Reservoir Dam stands as a testament to the importance of infrastructure in safeguarding water resources and mitigating climate-related risks. As climate change impacts continue to threaten water availability and quality, structures like this play a vital role in ensuring the resilience and sustainability of communities in the face of environmental challenges.
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 Grandin Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ashuelot River At Hinsdale | 758 cfs | → |
| Millers River At Erving | 643 cfs | → |
| East Branch Tully River Near Athol | 5 cfs | → |
| Ashuelot River At West Swanzey | 598 cfs | → |
| Connecticut River At Montague City | 16,000 cfs | → |
| Green River Near Colrain | 47 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Grandin Reservoir Dam.
Boat launches
- Connecticut River Boat Launch
- Swanzey Lake Boat Launch
- Doane Hill Road Royalston
- Spofford Lake Boat Launch
- North Orange Road 52-534, Athol
- Main Street 2010, Athol
Campgrounds
- Richardson-Zlogar Cabin
- Erving State Forest
- Falls Brook Shelter
- Barton Cove
- Fort Dummer State Park
- Swanzey Lake Camping Area
Paddle runs
- Headwaters To Confluence With West River (End Of Sherman Road)
- First Bridge Upstream On Route 100 To Confluence With West River
- Headwaters To First Bridge Upstream On Route 100
- Headwaters To North Of Searsburg Reservoir
- Stamford Town Line To Confluence With City Stream
- Headwaters To First Bridge
Track Grandin Reservoir 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 Grandin Reservoir Dam
Where does the data for Grandin Reservoir 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 Grandin Reservoir Dam.