Un-Named Dam dam
Un-Named Dam
Un-Named Dam, also known as Duv01, is a federally owned structure located in Duval, Florida, specifically in Jacksonville. This earthen dam serves the primary purpose of navigation and is regulated by the Florida Department of Environmental Protection. With a height of 30 feet and a hydraulic height of 27 feet, it has a maximum storage capacity of 5,704 acre-feet and a normal storage capacity of 1,758 acre-feet.
Despite being un-named, this dam holds significant importance in managing water resources in the area, as it forms an unnamed impoundment with a surface area of 113 acres and a drainage area of 0.18 square miles. The dam's spillway type is uncontrolled, with a width of 4 feet, and it has a high hazard potential with a fair condition assessment as of May 2017. The risk assessment for this dam is classified as moderate, with no emergency action plan prepared or updated.
Water resource and climate enthusiasts would find Un-Named Dam's unique characteristics and operational details intriguing, especially given its location in a densely populated area. The dam's role in navigation and water storage, coupled with its high hazard potential and moderate risk assessment, highlight the importance of regular inspections and maintenance to ensure the safety of surrounding communities. As an un-named yet significant structure, this dam exemplifies the critical infrastructure managing water resources in Florida and the need for ongoing monitoring and risk management measures.
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 Un-Named Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pottsburg Creek Nr South Jacksonville | 8 cfs | → |
| St. Johns River At Jacksonville | 65,100 cfs | → |
| Cedar River At San Juan Ave At Jacksonville | 343 cfs | → |
| Julington Crk At Old St August Rd Nr Bayard | 131 cfs | → |
| Ortega River At Kirwin Rd Nr Jacksonville | 4 cfs | → |
| North Fork Black Creek Nr Middleburg | 4 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Un-Named Dam.
Boat launches
- Fulton Road 5047, Jacksonville
- Joe Carlucci - Sisters Creek
- Cedar Point Road 9099, Jacksonville
- Jacksonville
- Howalt Court North 6865, Jacksonville
Campgrounds
- Huguenot City Park
- Pelican Roost Rv Military - Mayport Ns
- Hanna City Park
- Little Talbot Island State Park
- Osprey Cove Military - Mayport Ns
- Jacksonville Nas Rv Military
Fishing spots
Paddle runs
- Begins Approximately 1 Mile Upstream Of Flea Hill, Georgia To The Bells River Confluence
- Begins Approximately 1 Mile Downstream Of U.S. 301 Crossing To Ends Approximately 1 Mile Upstream Of Flea Hill, Georgia
- Trader's Hill To Ends Approximately 1 Mile Downstream Of U.S. 301 Crossing
- The Confluence Of The North Prong And Middle Prong To Trader's Hill
Track Un-Named 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 Un-Named Dam
Where does the data for Un-Named 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 Un-Named Dam.