Lake Delhi Dam dam
Lake Delhi Dam
Lake Delhi Dam, located in Hopkinton, Iowa, serves as a recreational haven nestled along the Maquoketa River. Built in 1922, this gravity dam stands at a height of 55 feet and spans 750 feet in length, with a storage capacity of 9,920 acre-feet and a surface area of 440 acres. The dam's primary purpose is recreation, offering locals and visitors alike a tranquil escape for various water activities.
Managed by a private owner, Lake Delhi Dam is regulated and inspected by the Iowa Department of Natural Resources, ensuring its structural integrity and safety for the surrounding community. Despite being classified as having a significant hazard potential, the dam's condition is deemed satisfactory as of the last inspection in July 2020. With a risk assessment rating of very high, measures are in place to mitigate potential risks and ensure the dam's resilience in the face of climate challenges.
As a vital component of the local landscape, Lake Delhi Dam not only provides recreational opportunities but also plays a crucial role in water resource management within the region. With its controlled spillway and rock and soil foundations, this historic dam continues to stand as a testament to engineering ingenuity and environmental stewardship, attracting water resource and climate enthusiasts to appreciate its significance in sustaining the surrounding ecosystem.
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 Lake Delhi Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Maquoketa River At Manchester | 525 cfs | → |
| Wapsipinicon River Near Anamosa | 2,920 cfs | → |
| Turkey River At Garber | 1,590 cfs | → |
| Volga River At Littleport | 476 cfs | → |
| Wapsipinicon River At Independence | 1,950 cfs | → |
| Turkey River Above French Hollow Cr At Elkader | 1,040 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Delhi Dam.
Boat launches
- Us 20 Manchester
- West Lake Trail Delaware County
- Sutton Road Linn County
- Central City Trail Linn County
Campgrounds
- Silver Lake County Park
- Turtle Creek County Park
- Baileys Ford
- Pin Oak Co Park
- Coffins Grove Park Campground
- Coffins Grove
Fishing spots
Track Lake Delhi 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 Lake Delhi Dam
Where does the data for Lake Delhi 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 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 Lake Delhi Dam.