Roza Ww5 Reregulation Reservoir dam
Roza Ww5 Reregulation Reservoir
Roza Ww5 Reregulation Reservoir, located in Sunnyside, Washington, is a vital public utility structure managed by the Washington Department of Ecology. Completed in 2017, this Earth type dam serves the primary purpose of irrigation, providing a storage capacity of 1600 acre-feet of water for agricultural needs in the Yakima County area. With a hydraulic height of 70 feet and a structural height of 70 feet, this reservoir covers a surface area of 31.2 acres and has a drainage area of 15.2 square miles.
The reservoir boasts a high hazard potential but has been assessed to be in satisfactory condition as of May 2017. Regular inspections occur every 5 years to ensure its safe operation. Although the spillway type, width, and other specific details are not provided, the dam is equipped to handle a maximum discharge of 125 cubic feet per second. With its location in Congressional District 04, this reservoir plays a crucial role in supporting agriculture in the region and is a key component in the water resource management of the area.
Roza Ww5 Reregulation Reservoir stands as a testament to the commitment of Washington state to effectively regulate and manage its water resources. With its significant storage capacity and strategic location in the Yakima Valley, this reservoir plays a vital role in supporting the irrigation needs of the agricultural community. As climate change continues to impact water availability, structures like Roza Ww5 Reregulation Reservoir are essential for ensuring a sustainable water supply 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 Roza Ww5 Reregulation Reservoir -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Granger Drain At Granger | 43 cfs | → |
| Yakima River At Mabton | 4,700 cfs | → |
| Columbia River Below Priest Rapids Dam | 158,000 cfs | → |
| Yakima River Above Ahtanum Creek At Union Gap | 2,370 cfs | → |
| Ahtanum Creek At Union Gap | 81 cfs | → |
| Yakima River At Kiona | 1,120 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Roza Ww5 Reregulation Reservoir.
Boat launches
- Sunnyside Mabton Road 6448-7798, Mabton
- North Meyers Road 2842, Toppenish
- Bryon Road, Prosser
- Vernita Bridge 96, Mattawa
- Road 26 Southwest Desert Aire
- North State Route 225 Benton County
Campgrounds
Paddle runs
Track Roza Ww5 Reregulation Reservoir 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 Roza Ww5 Reregulation Reservoir
Where does the data for Roza Ww5 Reregulation Reservoir 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 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 Roza Ww5 Reregulation Reservoir.