Knob Lake Dam dam
Knob Lake Dam
Knob Lake Dam, also known as Knob Lake Sawmill Hollow Dam, is a state-owned structure located in Jackson, Indiana. Built in 1940, this earth dam stands at a height of 27 feet and spans 420 feet in length. Its primary purpose is for recreation, providing a serene environment for water resource and climate enthusiasts to enjoy. The dam holds a maximum storage capacity of 131 acre-feet and covers a surface area of 6.49 acres.
Managed by the Indiana Department of Natural Resources, Knob Lake Dam is regulated, inspected, and enforced by the state regulatory agency. With a high hazard potential and fair condition assessment, the dam has a moderate risk level. The spillway, with a width of 64 feet, is uncontrolled, while the outlet gates are other controlled. Despite its age, the dam continues to serve its purpose effectively, offering a picturesque setting for outdoor activities and relaxation.
The dam is situated on an unnamed tributary of Pond Creek, contributing to a drainage area of 0.28 square miles. With a maximum discharge of 371 cubic feet per second, Knob Lake Dam plays a vital role in managing water flow in the area. As a popular destination for recreation, the dam attracts visitors seeking to appreciate the beauty of nature while also serving as an essential infrastructure for water resource management in Indiana.
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 Knob Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| East Fork White River At Seymour Ind | 2,440 cfs | → |
| Muscatatuck River Near Deputy | 130 cfs | → |
| West Fork Blue River At Salem | 9 cfs | → |
| Vernon Fork Muscatatuck River At Vernon | 73 cfs | → |
| East Fork White River Near Bedford | 4,280 cfs | → |
| East Fork White River At Columbus | 1,410 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Knob Lake Dam.
Boat launches
- Boat Ramp Access Jackson County
- Jackson County
- County Road 775 South, Vallonia
- East Delaney Millport Road 76, Vallonia
- Indiana 258 5748, Seymour
- North County Road 760 East 7248, Seymour
Campgrounds
- Jackson - Washington State Forest
- Starve Hollow State Rec Area
- Delaney Creek Park
- Hardy Lake State Rec Area
- Hickory Ridge Horse Camp
- Campground Gatehouse
Paddle runs
- Junction Of North/South Forks Of Lost River To State Road 337 Bridge, Approx 4 Miles Southeast Of Orleans, In
- State Road 337 Bridge To State Road 56 Bridge At Prospect, In
- State Road 56 Bridge To Forest Purchase Boundary At Roland, In
- City Limits Of English, In To Carnes Mill Site In Ne1/4ne1/4 Of Sec 13, T3s, R1w
- Carnes Mill Site To 7.65 Miles Above Confluece With Ohio River At Confluence With Turkey Creek
Track Knob 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 Knob Lake Dam
Where does the data for Knob 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 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 Knob Lake Dam.