Ryan Lake Dam dam
Ryan Lake Dam
Ryan Lake Dam, located in Pacific, Missouri, is a privately owned earth dam primarily used for recreational purposes. Completed in 1961, this dam stands at a height of 31 feet and has a storage capacity of 33 acre-feet, with a normal storage level of 18 acre-feet. Situated on the TR to Calvey Creek, this dam covers a surface area of 2 acres and serves the surrounding area with low hazard potential.
Owned by a private entity, Ryan Lake Dam is not regulated or inspected by state agencies, making it a unique feature in the region. With a buttress core and an unknown foundation type, this dam offers a peaceful retreat for water resource and climate enthusiasts to enjoy outdoor activities in a serene setting. Although it has not been rated for its condition assessment, Ryan Lake Dam continues to provide valuable recreation opportunities for the community.
Despite its unregulated status, Ryan Lake Dam remains a safe and reliable structure for visitors seeking a tranquil environment for fishing, boating, and other recreational activities. With its low hazard potential and idyllic location in Jefferson County, Missouri, this dam is a hidden gem for nature lovers and outdoor enthusiasts looking to connect with the local water resources and climate dynamics. Whether for leisure or educational purposes, Ryan Lake Dam offers a unique experience for those interested in exploring the intersection of water management and environmental sustainability.
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 Ryan Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Big River At Byrnesville | 361 cfs | → |
| Big River Near Richwoods | 346 cfs | → |
| Meramec River At Pacific | 1,300 cfs | → |
| Meramec River Near Eureka | 1,770 cfs | → |
| Bourbeuse River At Union | 353 cfs | → |
| Williams Creek Near Peerless Park | 8 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Ryan Lake Dam.
Boat launches
- Stierberger Court Union
- Highway Uu Franklin County
- Highway W Franklin County
- Ellis Grove Parkway Jefferson County
- Meramec State Park Franklin County
- Allen Road 204, Fenton
Campgrounds
- Robertsville State Park
- Washington State Park
- Klondike County Park
- Backpack Camp 8
- Backpack Camp 7
- Backpack Camp 1
Paddle runs
Track Ryan Lake Dam 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 Ryan Lake Dam
Where does the data for Ryan Lake Dam 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 Ryan Lake Dam.