Em Johnson Alum Sludge Lagoon Dam dam
Em Johnson Alum Sludge Lagoon Dam
The Em Johnson Alum Sludge Lagoon Dam, located in Wake County, North Carolina, is a privately owned structure that serves a unique purpose related to water resource management. This Earth-type dam, completed in 1994, has a hydraulic height of 38 feet and a structural height of 41 feet, helping to regulate the flow of Honeycutt Creek-Os. With a storage capacity of 108.3 acre-feet and a normal storage level of 90 acre-feet, this dam plays a vital role in controlling water levels in the area.
Despite its satisfactory condition assessment as of October 2020, the Em Johnson Alum Sludge Lagoon Dam is classified as having a high hazard potential, highlighting the importance of regular inspections and maintenance. The dam's emergency action plan (EAP) was last revised in July 2018, and it meets all necessary guidelines for managing potential risks and emergencies. With a maximum discharge capacity of 190 cubic feet per second, this dam is equipped to handle significant water flow while ensuring the safety of surrounding communities.
The presence of this dam underscores the critical role that infrastructure plays in water resource management and climate resilience efforts. As a key component of the state-regulated system, the Em Johnson Alum Sludge Lagoon Dam represents a commitment to safeguarding water resources and mitigating potential hazards. With ongoing inspections and adherence to regulatory guidelines, this dam continues to serve as a crucial asset in maintaining the ecological balance of the region and protecting against adverse impacts of changing climate conditions.
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 Em Johnson Alum Sludge Lagoon Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Neuse River Near Falls | 123 cfs | → |
| Crabtree Creek At Hwy 70 At Raleigh | 13 cfs | → |
| Marsh C Nr New Hope | 1 cfs | → |
| Crabtree Creek At Us 1 At Raleigh | 17 cfs | → |
| Crabtree Cr At Ebenezer Church Rd Nr Raleigh | 14 cfs | → |
| Rocky Branch Below Pullen Drive At Raleigh | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Em Johnson Alum Sludge Lagoon Dam.
Boat launches
- Barton's Creek Boat Ramp
- Neuse River Trail Raleigh
- Falls Lake Trail Wake County
- Durham County
- Creedmoor Road 13900, Town Of Wake Forest
- Milburnie Dam Bridge Raleigh
Campgrounds
- Durant Nature Park
- Blue Heron Campground
- Osprey Nest Campground
- Bootleg Point Campground
- Shoreline Campground
- Shortleaf Pine Campground
Track Em Johnson Alum Sludge Lagoon 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 Em Johnson Alum Sludge Lagoon Dam
Where does the data for Em Johnson Alum Sludge Lagoon 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 Em Johnson Alum Sludge Lagoon Dam.