Eastdale #1 dam
Eastdale #1
Eastdale #1 is a privately owned irrigation dam located in Costilla, Colorado, along the Costilla Creek. Built in 1909, this earth dam stands at 31 feet high and spans 2175 feet in length, with a storage capacity of 5820 acre-feet. Despite its low hazard potential, the dam's condition has been assessed as unsatisfactory, with the last inspection in May 2017 revealing the need for improvements.
The dam features two slide (sluice) gates as outlet structures and an uncontrolled spillway with a width of 75 feet. With a maximum discharge capacity of 4384 cubic feet per second, Eastdale #1 serves the critical purpose of irrigation for the surrounding area. However, with a moderate risk assessment rating and a history of unsatisfactory condition, there may be challenges ahead in ensuring the dam's safety and functionality in the face of changing climate conditions and water resource management practices.
As water resource and climate enthusiasts, keeping a watchful eye on Eastdale #1's maintenance and potential upgrades will be crucial in safeguarding its role in supporting agricultural activities and water supply in the region. With a clear understanding of the dam's history, purpose, and current condition, stakeholders can work together to address any risks and ensure the resilience of this essential infrastructure 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 Eastdale #1 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Costilla Creek Near Garcia | · | → |
| Rio Grande Near Lobatos | 63 cfs | → |
| Costilla Creek Near Costilla | 6 cfs | → |
| Culebra Creek At San Luis | 51 cfs | → |
| San Antonio River At Mouth | 61 cfs | → |
| Rio Grande Ab Mouth Trinchera C Nr Lasauses | 35 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Eastdale #1.
Campgrounds
Fishing spots
- Stabilization Reservoir
- Sanchez Reservoir
- Rio San Antonio
- Conejos River
- Smith Reservoir (Costilla Cty)
- Red River Fishing
Paddle runs
- Rio Grande River Segment C
- Rio Grande River Segment B
- Headwaters To Nf Boundary
- Headwaters To Cabresto Lake
- Nf Boundary To Nf Boundary
- Headwaters To Costilla Creek
More reservoirs
Track Eastdale #1 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 Eastdale #1
Where does the data for Eastdale #1 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 Eastdale #1.