Mississippi River Locks And Dam 27 dam
Mississippi River Locks And Dam 27
Mississippi River Locks and Dam 27, located in Granite City, Missouri, is a vital structure owned and operated by the US Army Corps of Engineers for navigation purposes on the Mississippi River. Completed in 1962, this rockfill dam stands at a height of 25 feet and spans a length of 3240 feet. With two locks facilitating the movement of water traffic, this dam plays a crucial role in managing water levels and ensuring safe navigation along the river.
Despite its significance, Mississippi River Locks and Dam 27 poses a significant hazard potential and is subject to regular inspections and risk assessments to mitigate potential risks. The US Army Corps of Engineers actively manages dam-related flood risks by monitoring the dam's condition, prioritizing maintenance activities, and engaging with local emergency managers and the public to raise awareness and preparedness for potential emergencies. The dam's emergency action plan is regularly updated, and measures are in place to address any issues that may arise during severe weather events or unexpected water flow conditions.
In light of the dam's critical role in water resource management and navigation, ongoing efforts are being made to enhance risk management measures and ensure the structural integrity of Mississippi River Locks and Dam 27. By maintaining a proactive approach to monitoring and addressing potential risks, the US Army Corps of Engineers aims to safeguard the surrounding communities and water resources while supporting the efficient movement of goods and vessels along the Mississippi River.
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 Mississippi River Locks And Dam 27 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Maline Creek At Bellefontaine Nbr | 118 cfs | → |
| Watkins Creek At Bellefontaine Nbr | 1 cfs | → |
| Mississippi River At St. Louis | 208,000 cfs | → |
| Watkins Creek Near Bellefontaine Neighbors | 0 cfs | → |
| Engelholm Creek Near Wellston | 3 cfs | → |
| River Des Peres Trib. At Pagedale | 4 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mississippi River Locks And Dam 27.
Boat launches
- Lake Drive Pontoon Beach
- Il 111 Pontoon Beach
- Spanish Lake
- Spanish Pond Road Spanish Lake
- Riverlands Way West Alton
- Davis Street Ferry Road East Carondelet
Track Mississippi River Locks And Dam 27 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 Mississippi River Locks And Dam 27
Where does the data for Mississippi River Locks And Dam 27 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 Significant 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 Mississippi River Locks And Dam 27.