Dam Report

Crystal dam

Colorado, USA Gunnison River Hazard High
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Dam height
227ft
Hazard rating
High
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Crystal -- None dam
Crystal None · Gunnison River
About this dam

Crystal

Crystal is a federal-owned dam located in Montrose, Colorado, on the Gunnison River, with a primary purpose of hydroelectric power generation. Built in 1977, this concrete arch dam stands at a height of 227 feet and has a hydraulic height of 225 feet, providing a maximum storage capacity of 30,726 acre-feet. With a surface area of 301 acres and a drainage area of 323 square miles, Crystal plays a significant role in water resource management in the region.

Managed by the Bureau of Reclamation, Crystal is subject to state regulation and inspection to ensure its safety and proper operation. With a high hazard potential and a risk assessment rating of 2 (high), it is crucial for emergency preparedness measures to be in place. Despite its critical role in power generation and water storage, the dam's condition assessment is currently listed as "Not Available," highlighting the importance of ongoing monitoring and maintenance to safeguard this vital infrastructure.

With its impressive structural specifications and vital role in water management, Crystal stands as a testament to the intersection of engineering excellence and environmental stewardship. As climate change continues to impact water resources, dams like Crystal play a crucial role in ensuring a reliable water supply for communities while also mitigating the risks associated with extreme weather events. As enthusiasts of water resources and climate, understanding the intricacies of dam infrastructure like Crystal is essential for fostering sustainable water management practices in the face of a changing climate.

StateNone
River / streamGunnison River
NID IDCO00387
Owner typeFederal
Primary purposeHydroelectric
Dam typeConcrete
Year built1977
Dam height227 ft
Dam length635 ft
Max storage30,726 AF
Normal storage25,236 AF
Surface area301.0 ac
Drainage area323.0 sq mi
Hazard potentialHigh
ConditionNot Available
Last inspectionThu, 15 Oct 2020 00:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Crystal -- inflows here typically show up in storage 24-72 hours later.

Track Crystal 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.

FAQ

About Crystal

Where does the data for Crystal 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.

Premium feature

Favorites and alerts are part of Snoflo Premium. Save reservoirs, set storage thresholds, and get push notifications when conditions cross.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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