Andorra Springs Basin B dam
Andorra Springs Basin B
Andorra Springs Basin B is a privately owned earth dam located in Whitemarsh Township, Montgomery County, Pennsylvania. Regulated by the Pennsylvania Department of Environmental Protection, this dam serves the primary purpose of flood risk reduction along the TR Schuylkill River. With a dam height of 16 feet and a length of 1000 feet, it provides a storage capacity of 14 acre-feet and covers a drainage area of 0.31 square miles.
Despite being classified as having a high hazard potential, the dam is currently in fair condition according to the latest inspection in April 2020. While the exact year of completion is unknown, the structure is designated for flood control and stands ready to mitigate potential risks in the region. With its location along the Schuylkill River, Andorra Springs Basin B plays a crucial role in protecting surrounding communities from the impacts of flooding and ensuring the safety of residents in the area.
As water resource and climate enthusiasts, understanding the importance of maintaining and monitoring infrastructure like Andorra Springs Basin B is vital for sustainable water management and disaster preparedness. With its significant role in flood risk reduction and its proximity to the TR Schuylkill River, this dam serves as a key defense against potential flooding events in the region. By staying informed about the condition and maintenance of such structures, enthusiasts can contribute to the resilience of water resources and the protection of communities against the impacts of climate change.
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 Andorra Springs Basin B -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wissahickon Creek At Fort Washington | 35 cfs | → |
| Schuylkill River At Norristown | 1,120 cfs | → |
| Wissahickon Creek At Mouth | 57 cfs | → |
| Cobbs Cr At U.S. Hghwy No. 1 At Philadelphia | 4 cfs | → |
| Tacony Creek At County Line | 23 cfs | → |
| Schuylkill River At Philadelphia | 915 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Andorra Springs Basin B.
Boat launches
- Norristown Riverfront Park
- Betzwood
- Arcola Rd 3506, Lower Providence Township
- Frankford Arsenal
- Tacony Boat Launch
- Phoenixville
Campgrounds
- Tinicum Island Primitive Campsite
- Camp Green Lane
- Camp Sumney
- Camp Laughing Waters
- Camp Delmont
- Nelson Training Center
Fishing spots
Track Andorra Springs Basin B 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 Andorra Springs Basin B
Where does the data for Andorra Springs Basin B 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 Andorra Springs Basin B.