Greystone dam
Greystone
Greystone, a historic Rockfill dam located in North Providence/Johnston, Rhode Island, was completed in 1865 and stands at a height of 10 feet with a length of 355 feet. It sits on the Woonasquatucket River and has a storage capacity of 116 acre-feet, with a drainage area of 39 square miles. Despite its age, the dam is still in use and has a low hazard potential, but its condition has been assessed as poor as of October 2017.
The primary purpose of Greystone is not specified, but it serves as a vital structure for water resource management in the area. With a normal storage capacity of 81 acre-feet and a maximum discharge of 1039 cubic feet per second, the dam plays a crucial role in regulating water levels and preventing flooding in the surrounding region. Although it is privately owned and not state-regulated, the dam undergoes regular inspections to ensure its structural integrity and safety.
Greystone's presence on the Woonasquatucket River contributes to the overall resilience of the local water infrastructure. Despite its age and poor condition assessment, the dam continues to fulfill its functions effectively, highlighting the importance of ongoing maintenance and monitoring efforts for aging water resource structures. Enthusiasts of water resources and climate resilience will appreciate Greystone's historical significance and its role in protecting the community from potential risks associated with water management.
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 Greystone -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Woonasquatucket River At Centerdale | 25 cfs | → |
| Moshassuck River At Providence | 15 cfs | → |
| Blackstone R At Roosevelt St At Pawtucket Ri | 520 cfs | → |
| Peeptoad Brook At Elmdale Rd Nr North Scituate | 1 cfs | → |
| Ten Mile River At Pawtucket Ave @ E Providence | 49 cfs | → |
| Pawtuxet River At Cranston | 170 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Greystone.
Boat launches
- Lincoln Woods
- Olney Pond
- Farnum Pike 334, Smithfield
- Jl Curran
- Stillhouse Cove
- Sabin Point Waterfront Park
Campgrounds
- George Washington State Campground
- Dyer Woods Nudist Campgrounds
- Narragansett Council, Boy Scouts Of America, Cub World
- "The Sandpits" Private Hiking And Winter Sports Area
- Camp Hoffman
- Camp Christina Entrance
Fishing spots
Track Greystone 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 Greystone
Where does the data for Greystone 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 Greystone.