Petry dam
Petry
Petry, also known as Lindsay Lake, is a private water resource located in Cowdrey, Colorado within the Big Grizzly-Tr river/stream system. This recreational dam, completed in 1964, stands at a height of 26 feet with a length of 463 feet, providing a storage capacity of 132 acre-feet. While primarily serving purposes such as flood risk reduction, irrigation, and recreation, Petry is regulated and inspected by the Colorado Division of Water Resources to ensure its safety and functionality.
Despite its low hazard potential, Petry poses a high risk due to lacking a condition assessment and updated emergency action plan. The dam's last inspection dates back to 1994, raising concerns about its current state and potential risks it may pose. With no inundation maps prepared and limited risk management measures in place, enthusiasts in water resource and climate fields may find Petry an intriguing case study for examining the importance of regular inspection and maintenance practices to prevent potential disasters and ensure the safety of surrounding communities.
As a privately owned structure with limited federal involvement, Petry's risk assessment of high magnitude underscores the significance of proactive risk management strategies and emergency preparedness measures. The dam's location in a remote area of Jackson County, Colorado, highlights the importance of continued monitoring and evaluation to mitigate any potential threats to the local ecosystem and downstream communities. For water resource and climate enthusiasts, Petry serves as a compelling example of the complexities involved in managing and maintaining aging infrastructure to safeguard water resources and surrounding environments.
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 Petry -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Michigan River At Walden | 42 cfs | → |
| Illinois Creek Near Rand | 64 cfs | → |
| Fish Cr At Upper Sta Nr Steamboat Springs | 274 cfs | → |
| Yampa River At Steamboat Springs | 987 cfs | → |
| Walton Creek Near Steamboat Springs | 347 cfs | → |
| North Platte River Near Northgate | 189 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Petry.
Boat launches
- Teal Lake Boating Site
- Cowdrey Lake Rec Site Boat Ramp
- Cowdrey Lake Rec Site Boat Dock
- Chambers Lake Boating Site
Campgrounds
- Grizzly Guard Station Recreation Rental
- Teal Lake
- Teal Lake Campground
- Teal Lake Group Site
- Grizzly Creek
- Hidden Lakes
Fishing spots
Paddle runs
- Roaring Fork (West Section Line Sec 28 T9n, R82w); Red Canyon (Nw1/4 Sec 5, T8n, R82w) To East Section Line Sec 34, T9n, R82w
- Headwaters Of North, Middle And South Forks To Confluence Of South Fork With Encampment River
- Lower Fish Creek
- South Sec Line, Sec 2, T11n, R80w To Co/Wy Stateline
- Northgate Canyon
- Spencer Heights
Track Petry 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 Petry
Where does the data for Petry 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 Petry.