Cranberry Lake Stormwater Detention Dam Dam
Cranberry Lake Stormwater Detention Dam
The Cranberry Lake Stormwater Detention Dam in Mason, Washington, is a crucial structure designed for flood risk reduction along Cranberry Creek. Completed in 1990, this earth dam stands at a hydraulic height of 8 feet and a structural height of 10 feet, with a length of 290 feet. It has a normal storage capacity of 3100 acre-feet and can hold a maximum of 3400 acre-feet, covering a surface area of 450 acres.
Located within the jurisdiction of the Washington Department of Ecology, this privately owned dam is inspected regularly, with the last assessment conducted in August 2020, reporting a satisfactory condition. The hazard potential is assessed as high, emphasizing the importance of proper maintenance and emergency preparedness. The dam plays a vital role in protecting surrounding areas from flooding, showcasing the collaborative efforts between private owners and state regulatory agencies to ensure the safety and resilience of the community.
With a primary purpose of flood risk reduction, the Cranberry Lake Stormwater Detention Dam serves as a critical infrastructure in managing water resources and mitigating the impacts of extreme weather events. Its strategic location and design reflect a commitment to safeguarding the environment and local communities from potential hazards, highlighting the importance of sustainable water management practices in the face of climate change challenges.
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 Cranberry Lake Stormwater Detention Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Skokomish River Near Potlatch | 227 cfs | → |
| North Fork Skokomish River Near Potlatch | 157 cfs | → |
| South Fork Skokomish River Near Union | 118 cfs | → |
| Huge Creek Near Wauna | 5 cfs | → |
| Nf Skokomish R Bl Staircase Rpds Nr Hoodsport | 52 cfs | → |
| Deschutes River At E St Bridge At Tumwater | 111 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Cranberry Lake Stormwater Detention Dam.
Boat launches
See all →
Campgrounds
See all →
Fishing spots
See all →
River runs
See all →
About Cranberry Lake Stormwater Detention Dam
Where does the data for Cranberry Lake Stormwater Detention 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 below 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.
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.