Green Verdugo dam
Green Verdugo
Green Verdugo, also known as Green Verdugo Reservoir, is a significant water supply infrastructure located in Sunland, California. This local government-owned dam on the Tr Tujunga Wash is regulated by the California Department of Water Resources for safety and permitting. Completed in 1953, this earth dam stands at a height of 118 feet with a storage capacity of 99 acre-feet, serving the primary purpose of water supply for the region.
With a high hazard potential and satisfactory condition assessment, Green Verdugo plays a crucial role in water resource management for Los Angeles County. The dam's structural height of 112 feet and length of 452 feet demonstrate its capacity to manage flood control and water storage efficiently. Despite its age, the dam has been regularly inspected, with the last assessment conducted in February 2021, ensuring its continued safety and functionality to meet the region's water needs.
As a key component of the local water infrastructure, Green Verdugo reservoir's strategic location and design contribute to the overall water management strategy for the area. With state regulation and enforcement in place, the dam serves as a vital asset in maintaining water supply reliability and flood protection measures. Climate and water resource enthusiasts will appreciate the role Green Verdugo plays in ensuring the sustainability and resilience of the region's water supply in the face of changing environmental conditions.
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 Green Verdugo -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big Tujunga C Bl Hansen Dam Ca | · | → |
| Arroyo Seco Nr Pasadena Ca | 2 cfs | → |
| Los Angeles R A Sepulveda Dam Ca | 37 cfs | → |
| Rio Hondo Ab Whittier Narrows Dam Ca | 1 cfs | → |
| Rio Hondo Bl Whittier Narrows Dam Ca | · | → |
| San Gabriel R Ab Whittier Narrows Dam Ca | 10 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Green Verdugo.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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About Green Verdugo
Where does the data for Green Verdugo 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.