Shadow Lake Dam dam
Shadow Lake Dam
Shadow Lake Dam, located in Montgomery, Texas, is a privately owned structure built in 1964 for recreational purposes along the Old Boggy Slough. The dam, primarily made of earth with a buttress core, stands at a height of 6.5 feet and has a hydraulic height of 8 feet. With a capacity of 175 acre-feet, the dam serves as a vital water resource for the area, providing a surface area of 70 acres and normal storage of 56 acre-feet.
Despite its age, Shadow Lake Dam has undergone modifications in 1986 to enhance its hydraulic capabilities. The dam features an uncontrolled spillway with a width of 27 feet and two uncontrolled outlet gates. While the hazard potential and condition assessment are not readily available, the dam is inspected every 5 years, with the last assessment conducted in March 2015. The risk assessment categorizes the dam as having a moderate risk level with a DSAC assignment date yet to be determined.
Water resource and climate enthusiasts will find Shadow Lake Dam a fascinating structure, contributing to the recreational and water storage needs of the area. With its historical significance and ongoing management, the dam serves as a critical infrastructure for the community, regulated by the Texas Commission on Environmental Quality (TCEQ). As climate change continues to impact water resources, understanding and monitoring dams like Shadow Lake Dam become increasingly important for ensuring safety and sustainability in the face of evolving environmental challenges.
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 Shadow Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| W Fk San Jacinto Rv Nr Conroe | 475 cfs | → |
| Panther Branch At Gosling Rd | 11 cfs | → |
| Bear Branch At Research Blvd | 3 cfs | → |
| Caney Ck Nr Splendora | 35 cfs | → |
| Panther Branch Nr Spring | 18 cfs | → |
| Spring Ck Nr Spring | 138 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Shadow Lake Dam.
Boat launches
- Lake Woodlands Drive The Woodlands
- Boat Launch The Woodlands
- Piney Shores Boat Ramp
- Edgewater Drive 32210, Montgomery County
- Conroe Boat Ramp 830
- Scotts Ridge Swim Area
Campgrounds
- Forest Retreat Rv Park
- Lake Houston Wilderness Park
- Spring Creek Park
- End Of The Road Spot
- Cagle Recreation Area: (936) 344-6205
- Cagle Rec Area
Paddle runs
- Farm To Market Road 1375 To East Fork Of San Jacinto River
- Preserve Boundary In The Big Sandy Unit To Confluence With Trinity River
- Preserve Boundary In The Lance Rosier Unit To Confluence With Pine Island Bayou
- Preserve Boundary Of The Big Sandy Unit To Confluence With Village Creek
Track Shadow Lake 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 Shadow Lake Dam
Where does the data for Shadow Lake 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 Shadow Lake Dam.