Triphammer Pond Dam dam
Triphammer Pond Dam
Triphammer Pond Dam, located in Hingham, Massachusetts, serves a primary purpose of recreation and was completed in 1940. The dam, a 5.3 feet high earth structure with a hydraulic height of 10 feet, is situated on a tributary of Weir River and is regulated by the Department of Conservation and Recreation. With a storage capacity of 75 acre-feet and a low hazard potential, the dam's condition was assessed as fair during the last inspection in September 2009.
Although Triphammer Pond Dam has a moderate risk assessment rating of 3, its hazard potential remains low. The dam has not undergone any modifications in recent years and does not currently have an Emergency Action Plan (EAP) in place. Despite the absence of inundation maps and updated emergency contacts, the dam's risk management measures have not been specified. The structure's overall risk character summary and DSAC assignment date are also pending further details, indicating a need for more comprehensive risk assessment and management protocols in the future.
For water resource and climate enthusiasts, Triphammer Pond Dam offers a valuable case study in dam safety and regulation within Massachusetts. This local government-owned earth dam provides recreational opportunities while being subject to state jurisdiction, regulation, inspection, and enforcement. As the dam's risk assessment suggests a moderate level of potential issues, further attention and action may be necessary to ensure the structural integrity and safety of the Triphammer Pond Dam for both the community and the surrounding environment.
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 Triphammer Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Whitmans Pond Fish Ladder At East Weymouth | 3 cfs | → |
| Whitmans Pond | 7 cfs | → |
| Old Swamp River Near South Weymouth | 3 cfs | → |
| Indian Head River At Hanover | 23 cfs | → |
| Neponset River At Milton Village | 155 cfs | → |
| Neponset River At Greenlodge St Near Canton | 76 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Triphammer Pond Dam.
Boat launches
- Ship Street Hingham
- Gonzo Hingham
- Commercial Street Weymouth
- Bridge Street Norwell
- Randolph Street 315, Weymouth
- Town Street 128, Braintree
Track Triphammer Pond 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 Triphammer Pond Dam
Where does the data for Triphammer Pond 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 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 Triphammer Pond Dam.