Manville dam
Manville
Manville, a masonry dam located in Cumberland, Rhode Island, on the Blackstone River, was completed in 1860 and stands at a height of 22 feet with a hydraulic height of 19 feet. The dam has a storage capacity of 349 acre-feet and a drainage area of 408 square miles. With a maximum discharge rate of 14,000 cubic feet per second, the dam serves as a vital structure for managing water resources in the area.
Despite its age, Manville has been assessed as having a low hazard potential but poor condition, with a recent condition assessment conducted in October 2017. The dam has a spillway width of 160 feet and a surface area of 58 acres. While it is not regulated by the state, it is subject to regular inspections to ensure its structural integrity and functionality. Manville plays a crucial role in flood control and water management in the region, highlighting the importance of maintaining and monitoring such infrastructure for climate resilience and water resource sustainability.
With its historical significance and essential role in water management, Manville stands as a testament to the engineering feats of the past. As climate change poses new challenges to water resources, the upkeep and modernization of structures like Manville become increasingly crucial. By staying vigilant in inspections and maintenance, communities can ensure the continued effectiveness of such dams in mitigating flood risks and supporting sustainable water management practices for the future.
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 Manville -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Blackstone River At Woonsocket | 441 cfs | → |
| Branch River At Forestdale | 68 cfs | → |
| Blackstone R At Roosevelt St At Pawtucket Ri | 459 cfs | → |
| Woonasquatucket River At Centerdale | 25 cfs | → |
| Moshassuck River At Providence | 16 cfs | → |
| Peeptoad Brook At Elmdale Rd Nr North Scituate | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Manville.
Boat launches
Campgrounds
- George Washington State Campground
- "The Sandpits" Private Hiking And Winter Sports Area
- Narragansett Council, Boy Scouts Of America, Cub World
- Dyer Woods Nudist Campgrounds
- Minha Casa
- Camp Christina Entrance
Fishing spots
Track Manville 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 Manville
Where does the data for Manville 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 Manville.