Longview Dam dam
Longview Dam
Longview Dam, also known as Longview Lake, is a federal-owned structure located in Kansas City, Missouri, along the Little Blue River. Completed in 1985, this earth dam stands at a hydraulic height of 120 feet and a structural height of 125 feet, with a length of 1900 feet and a dam volume of 1,943,000 cubic yards. The dam serves multiple purposes, including flood risk reduction, fish and wildlife pond, recreation, and water supply, with a normal storage capacity of 22,100 acre-feet.
Managed by the US Army Corps of Engineers, Longview Dam has a high hazard potential and is regularly monitored for its condition and risk assessment. The dam's emergency action plan, last revised in January 2021, meets guidelines, and inundation maps are prepared for potential flood scenarios. The USACE actively engages with local emergency managers and the public to raise awareness of the dam and ensure readiness for any dam-related emergencies.
In times of severe weather events or increased water levels, the dam may release water to manage downstream or relieve pressure to maintain structural integrity. Risk management measures implemented by the USACE include ongoing monitoring, prioritizing activities to reduce risks, and collaborating with local authorities to develop emergency and evacuation plans. Overall, Longview Dam plays a vital role in flood risk reduction and water management in the region, with continuous efforts to enhance its safety and effectiveness.
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 Longview Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Blue River At Kansas City | 407 cfs | → |
| Blue River At Blue Ridge Blvd Ext In Kc | 237 cfs | → |
| Indian C At State Line Rd | 135 cfs | → |
| Tomahawk C Nr Overland Park | 38 cfs | → |
| Blue R At Kenneth Rd | 153 cfs | → |
| Blue River At Stadium Drive In Kc | 643 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Longview Dam.
Boat launches
- Southeast Raytown Road Lee's Summit
- River Trail Kansas City
- Lee's Summit
- East Loch Lloyd Parkway Loch Lloyd
- South Lake Road Cass County
- Cass County
Track Longview 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 Longview Dam
Where does the data for Longview 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 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Longview Dam.