Rattlewood Golf Course dam
Rattlewood Golf Course
Rattlewood Golf Course, also known as Frall Pond, is a picturesque irrigation and recreation facility located in Montgomery County, Maryland. Owned and managed by the local government, this Earth-type dam was completed in 1975 and stands at a height of 30.5 feet, with a storage capacity of 50 acre-feet. The dam serves primarily for irrigation purposes, supporting the lush greenery of the golf course while also providing recreational opportunities for visitors.
Managed by the Maryland Dam Safety regulatory agency, the Rattlewood Golf Course dam has a significant hazard potential but is currently assessed as being in satisfactory condition. Regular inspections are conducted to ensure its safety, with the latest inspection carried out in June 2021. The dam underwent structural upgrades in 2009, enhancing its resilience and functionality. With a moderate risk assessment rating, the dam is equipped with an uncontrolled spillway and measures in place to manage potential risks effectively.
Situated near the Patuxent River in the city of Mt Airy, Rattlewood Golf Course dam covers a surface area of 3 acres and drains a 0.2 square-mile watershed. The facility boasts a spillway width of 20 feet and a maximum discharge capacity of 10 cubic feet per second. As a crucial water resource for irrigation and recreation, Rattlewood Golf Course dam stands as a testament to sustainable water management practices and the harmonious integration of human activities with natural ecosystems.
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 Rattlewood Golf Course -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Cattail Creek Near Glenwood | 16 cfs | → |
| Patuxent River Near Unity | 15 cfs | → |
| Monocacy River At Jug Bridge Near Frederick | 237 cfs | → |
| Bennett Creek At Park Mills | 29 cfs | → |
| Monocacy River At Monocacy Blvd At Frederick | 151 cfs | → |
| Patuxent River Below Brighton Dam Near Brighton | 14 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Rattlewood Golf Course.
Boat launches
- Piney Run Park
- Clarksburg Road Germantown
- Frederick
- Chesapeake And Ohio Canal Frederick County
- Liberty Road Carroll County
- Lakeview Avenue Carroll County
Campgrounds
- Little Bennett Campground
- Little Bennett Regional Park
- Turner Farm
- Indiant Flats Campsite
- Gambrill State Park
- Calico Rocks Campsite
Track Rattlewood Golf Course 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 Rattlewood Golf Course
Where does the data for Rattlewood Golf Course 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 Significant 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 Rattlewood Golf Course.