Mcnairycypress Creek #17 dam
Mcnairycypress Creek #17
Mcnairycypress Creek #17, also known as Mcnairy Cypress Creek W/S Dam 12, is a flood risk reduction structure located in McNairy, Tennessee. Built in 1979, this earth dam stands at a structural height of 34.1 feet and has a hydraulic height of 13.8 feet. With a NID storage capacity of 550 acre-feet and a normal storage capacity of 60 acre-feet, the dam serves the primary purpose of flood risk reduction along Wolf Branch.
Managed by the Tennessee Safe Dams Program, Mcnairycypress Creek #17 has a high hazard potential but is currently rated as satisfactory in terms of condition assessment, according to the last inspection conducted in May 2020. The dam has no outlet gates and features an uncontrolled spillway type. It is regulated, permitted, inspected, and enforced by state agencies, ensuring its compliance with safety standards and guidelines. The risk assessment for this structure is categorized as moderate (3), indicating a proactive approach to risk management measures.
This dam, designed by USDA NRCS & Hal Pridgeon, Jr of Prather.Thomas.Campbell.Pridgeon, is an essential infrastructure providing flood protection to the surrounding area. With its strategic location and effective design, Mcnairycypress Creek #17 remains a critical asset for water resource and climate management enthusiasts in the region, showcasing the collaborative efforts between local government and regulatory agencies to safeguard communities from potential flood hazards.
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 Mcnairycypress Creek #17 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Horse Creek Near Savannah | 54 cfs | → |
| Hatchie River Near Walnut | 86 cfs | → |
| Hatchie River At Bolivar | 1,460 cfs | → |
| Wolf River At Lagrange | 180 cfs | → |
| Bear Creek At Bishop | 4,330 cfs | → |
| Middle Fork Forked Deer River Near Fairview | 215 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mcnairycypress Creek #17.
Boat launches
- Highway 57 23970-23972, Pocahontas
- Wharf Road, Savannah
- Tennessee River Lane 475, Savannah
- White Oak Wildlife Road, Sardis
- Branun Cemetery Road, Savannah
- Main Street 499, Saltillo
Campgrounds
- Big Hill Pond State Park Campground
- Big Hill Pond Sp - Grassy Point Shelter
- Pickwick Dam - Tva
- Pickwick Landing Sp - Trail Camps
- Chickasaw State Park - Tent
Paddle runs
Track Mcnairycypress Creek #17 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 Mcnairycypress Creek #17
Where does the data for Mcnairycypress Creek #17 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 Mcnairycypress Creek #17.