Upper East Fk Laterals Ws Scs Site 4b Dam dam
Upper East Fk Laterals Ws Scs Site 4b Dam
Upper East Fk Laterals WS SCS Site 4b Dam, also known as Phelps Lake, is a vital flood risk reduction structure located in Rockwall, Texas. Built in 1955 by the USDA NRCS, this earth dam stands at a height of 40 feet and spans a length of 1594 feet. With a storage capacity of 646 acre-feet and a normal storage of 132 acre-feet, the dam serves multiple purposes including fire protection, stock, small fish pond, flood risk reduction, and recreation.
Situated along the TR-Squabble Creek, the dam is regulated by the Texas Commission on Environmental Quality (TCEQ) and undergoes regular inspections to ensure its integrity. The spillway, with a width of 103 feet, is of the uncontrolled type, allowing for a maximum discharge of 3466 cubic feet per second. Despite a recent unsatisfactory condition assessment in April 2021, the risk potential is considered moderate (3) with no hazard potential available. The dam's emergency action plan (EAP) was last revised in 2010, highlighting the importance of continued monitoring and risk management measures for this critical infrastructure.
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 Upper East Fk Laterals Ws Scs Site 4b Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Squabble Ck At Shores Blvd Nr Rockwall | · | → |
| Muddy Ck At Creek Crossing Ln Nr Sachse | 20 cfs | → |
| Rowlett Ck Nr Sachse | 110 cfs | → |
| E Fk Trinity Rv Blw Lk Ray Hubbard Nr Forney | 30 cfs | → |
| S Fk Sabine Rv Nr Quinlan | 18 cfs | → |
| E Fk Trinity Rv Nr Forney | 6,120 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Upper East Fk Laterals Ws Scs Site 4b Dam.
Boat launches
- Willow Bend Rockwall
- Old State Highway 66 Rowlett
- Lake Road Lavon
- Chardonnay Drive Rowlett
- Clear Lake Park Collin County
- Peninsula Court Heath
Campgrounds
- Equestrian Camp Sites
- Tent Sites
- Erwin Park - Mckinney
- Wind Point Park
- Lake Tawakoni State Park
- Sandy Lake Rv Resort
Fishing spots
Track Upper East Fk Laterals Ws Scs Site 4b 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 Upper East Fk Laterals Ws Scs Site 4b Dam
Where does the data for Upper East Fk Laterals Ws Scs Site 4b 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 Not Available 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 Upper East Fk Laterals Ws Scs Site 4b Dam.