Sylvia Lake Dam Pierce Co dam
Sylvia Lake Dam Pierce Co
Sylvia Lake Dam in Pierce County, Washington, is a privately owned structure primarily used for recreation. Completed in 1963, this earth dam stands at a height of 16 feet and has a length of 390 feet, creating a reservoir with a storage capacity of 142 acre-feet. The dam is located in the Tr-Puget Sound watershed, with a drainage area of 0.95 square miles and a surface area of 6.4 acres.
Managed and regulated by the Washington Department of Ecology, Sylvia Lake Dam is inspected regularly to ensure its structural integrity and safety. The dam has been assessed to be in fair condition, with a significant hazard potential. The last inspection was conducted in July 2021, with an inspection frequency of 5 years. In case of emergencies, an emergency action plan (EAP) may be in place, although details on its preparation and guidelines compliance are not specified in the data.
Sylvia Lake Dam provides not only recreational opportunities but also serves as a crucial infrastructure component in the region. With its strategic location and importance in water resource management, the dam plays a vital role in the overall ecosystem health and climate resilience of the area. As water resource and climate enthusiasts, understanding the significance of dams like Sylvia Lake Dam in maintaining water supply, flood control, and environmental sustainability is essential for advocating for their proper maintenance and 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 Sylvia Lake Dam Pierce Co -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Huge Creek Near Wauna | 7 cfs | → |
| Leach Creek Near Fircrest | 2 cfs | → |
| Chambers Creek Bl Leach Creek Near Steilacoom | 165 cfs | → |
| Flett Creek At Tacoma | 11 cfs | → |
| Clover Creek Near Tillicum | 29 cfs | → |
| Swan Creek At 80th St East Near Tacoma | 2 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Sylvia Lake Dam Pierce Co.
Boat launches
- 3rd Avenue Fi 100-176, Fox Island
- Gig Harbor Public Boat Launch
- 10th Street Northwest 4366, Pierce County
- Hall Road Kp North 17820-17998, Vaughn
- 177th Avenue Kp North 3300, Lakebay
- Sidney Road Southwest 15013-15015, Port Orchard
Campgrounds
- Kopachuck State Park
- Gig Harbor Rv Resort
- Penrose Point State Park
- Wwta Camp Site
- Joemma Beach State Park
- Jarrell Cove State Park
Paddle runs
- Brothers Wilderness Boundary To Olympic Nf Boundary
- Olympic Nf/Olympic Np Bounary To Brothers Wilderness Boundary
- Headwaters- Includes All Tributaries To Confluence With North Fork Skokomish River
- Headwaters To Confluence With North Fork Skokomish River
- Headwaters- Includes All Tributaries To Confluence With Duckabush River
Track Sylvia Lake Dam Pierce Co 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 Sylvia Lake Dam Pierce Co
Where does the data for Sylvia Lake Dam Pierce Co 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 Significant 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 Sylvia Lake Dam Pierce Co.