Durhack Dam No 4 dam
Durhack Dam No 4
Durhack Dam No 4, located in San Juan, Washington, was completed in 1968 and is owned by a private entity. The dam's primary purpose is for recreation, offering opportunities for outdoor enthusiasts to enjoy its surroundings. Standing at a hydraulic height of 21 feet and a structural height of 16 feet, this earth dam is built on a stone core and a soil foundation, with a length of 184 feet.
The dam has a storage capacity of 150 acre-feet, with a normal storage level of 125 acre-feet and a surface area of 125 acres. It is regulated by the Washington Department of Ecology and is subject to state jurisdiction, permitting, inspection, and enforcement. Despite its low hazard potential, the dam's condition assessment is currently not rated, and it lacks an emergency action plan as well as updated inundation maps.
While the dam serves as a recreational site for the community, its structural integrity and safety measures should be regularly assessed and improved to ensure the protection of the surrounding area and the individuals who enjoy its amenities. With a focus on risk management and emergency preparedness, Durhack Dam No 4 can continue to provide a safe and enjoyable environment for water resource and climate enthusiasts.
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 Durhack Dam No 4 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Nooksack River At Ferndale | 3,120 cfs | → |
| Samish River Near Burlington | 117 cfs | → |
| Olsen Creek Near Bellingham | 2 cfs | → |
| Carpenter Creek At N Shore Drive Nr Bellingham | 1 cfs | → |
| Skagit River Near Mount Vernon | 18,300 cfs | → |
| Fishtrap Creek At Front Street At Lynden | 24 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Durhack Dam No 4.
Boat launches
Campgrounds
- Spencer Spit State Park Campground
- Moran State Park Campground
- Cascadia Marine Trail Campsite
- Fox Cove Camp
- Shallow Bay South
- Snoring Bay Camp
Paddle runs
- Sleepy Hollow Creek To Olympic Nf Boundary
- 1.4 Miles Upstream From Confluence With Elwha River To Confluence With Elwha River
- Usfs Road 2870 Bridge To Confluence With Dungeness River
- Olympic Nf/Olympic Np Boundary To Usfs Road 2870 Bridge
- Fish Hatchery To Confluence With South Fork Nooksack River
- Headwaters And Includes All Tributaries To Confluence With Elwha River
Track Durhack Dam No 4 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 Durhack Dam No 4
Where does the data for Durhack Dam No 4 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 Durhack Dam No 4.