Knoll dam
Knoll
Knoll is a state-regulated dam located in Coconino, Arizona, near the city of Winslow. Built in 1963, this Earth dam stands at a height of 58 feet and serves primarily as a Fish and Wildlife Pond, with additional purposes including recreation. The dam has a storage capacity of 1,774 acre-feet and covers a surface area of 77 acres, drawing water from the East Leonard Canyon Creek.
Managed by the Arizona Department of Water Resources, Knoll has a low hazard potential and a moderate risk assessment rating. The dam has not been rated for its condition, with the last inspection taking place in May 2012. It is equipped with an uncontrolled spillway with a width of 40 feet and a maximum discharge capacity of 875 cubic feet per second. While there are no locks associated with the dam, it is crucial for the conservation of fish and wildlife in the area.
Water resource and climate enthusiasts will find Knoll to be an intriguing structure due to its role in supporting local ecosystems and recreational activities. With its picturesque location in the Coconino County, this dam serves as a vital water source for the region while also providing a habitat for various species. The management and maintenance of Knoll by the Arizona Department of Water Resources ensure its continued functionality and safety for the community and the environment.
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 Knoll -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| East Verde R Div From East Clear Cr Nr Pine | 5 cfs | → |
| Chevelon Fork Below Wildcat Canyon | · | → |
| East Verde River Near Childs | 0 cfs | → |
| Tonto Creek Abv Gun Creek | 2 cfs | → |
| West Clear Creek Near Camp Verde | 15 cfs | → |
| Wet Beaver Creek Near Rimrock | 8 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Knoll.
Campgrounds
- Knoll Lake
- Knoll Lake Campground
- Bear Canyon Lake And Camping Area
- Tonto Creek Recreation Sites
- Upper Tonto Creek
- Fr 84 Camping Area
Fishing spots
- Horton Creek
- Woods Canyon Lake
- East Clear Creek
- Canyon Creek Fish Hatchery
- Canyon Creek
- Soldier Annex Lake
Paddle runs
- Below The Dam At Knoll Lake To Confluence With East Clear Creek
- Below Flow Structure In Sec 16, T12n,R11e To Confluence With Clear Creek
- 1/4 Mile Below Wiggins Crossing To Confluence With Clear Creek
- Christopher Creek
More reservoirs
Track Knoll 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 Knoll
Where does the data for Knoll 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 Knoll.