Maple Grove dam
Maple Grove
Maple Grove, located in Jefferson County, Colorado, is a crucial water supply dam situated on Lena Gulch. Built in 1956, this earth dam stands at 52 feet high and plays a significant role in providing water to the region. With a storage capacity of 1664 acre-feet and a controlled spillway width of 70 feet, Maple Grove ensures a reliable water source for the area.
Managed by the state regulatory agency DWR, Maple Grove is inspected regularly to ensure its structural integrity and satisfactory condition. With a high hazard potential, the dam is considered to have a very high risk level (1). Despite the risks associated with its location, Maple Grove meets safety guidelines and is equipped with emergency action plans to mitigate any potential threats.
Owned by a public utility, Maple Grove is a crucial infrastructure for water management in the region. Being under state jurisdiction and regulation, the dam not only provides water supply but also serves as a vital resource for climate enthusiasts and water resource management professionals alike.
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 Maple Grove -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Clear Creek At Golden | 104 cfs | → |
| Little Dry Creek At Westminster | 1 cfs | → |
| South Platte River At Denver | 103 cfs | → |
| Cherry Creek At Denver | 41 cfs | → |
| Bear Creek Above Bear Creek Lake Near Morrison | 2 cfs | → |
| Bear Creek At Morrison | 16 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Maple Grove.
Boat launches
- Ralston Creek Trail Arvada
- West 69th Avenue 4700, Westminster
- Fisherman's Trail Lakewood
- Standley Lake Trail Westminster
- C-470 Trail Lakewood
- West Quincy Avenue Denver
Campgrounds
- Clear Creek Rv Park
- Bear Creek Lake Park
- Standley Lake
- Tipi Village
- Gennessee Ropes Camp Spot
- Chatfield State Park
Fishing spots
- Prospect Park Lakes (Wheatridge)
- Ward Road Pond
- Crown Hill Lake
- Union Square Ponds
- Birdland Lake (Jack B. Tomlinson Park)
- Meadow Park Lake
Track Maple Grove 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 Maple Grove
Where does the data for Maple Grove 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 Maple Grove.