Iowa Noname77 dam
Iowa Noname77
Iowa Noname77 is a locally-owned earth dam located in Marshalltown, Iowa, along the TR-LINN CREEK river or stream. Built in 1976 by CLAPSADDLE-GARBER ASSOC and USDA NRCS, this dam serves a variety of purposes beyond flood control, as indicated by its 'Other' primary purpose designation. With a dam height of 24 feet and a length of 800 feet, Iowa Noname77 has a normal storage capacity of 44 acre-feet and a maximum storage of 81 acre-feet across its 6.2-acre surface area.
Managed by the Iowa Department of Natural Resources, this low-hazard dam is regulated, inspected, and enforced by state authorities. Despite being rated as 'Not Rated' in terms of condition assessment, Iowa Noname77 is considered to have a moderate risk level (3) according to the available data. While the dam's emergency action plan status, risk management measures, and inundation maps remain unclear, the regulatory oversight and enforcement mechanisms in place provide a level of assurance for the surrounding community and environment. Water resource and climate enthusiasts can appreciate the complexities and implications of managing dams such as Iowa Noname77 within the broader context of sustainable water resource management and climate resilience efforts.
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 Iowa Noname77 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Iowa River At Marshalltown | 1,520 cfs | → |
| Timber Creek Near Marshalltown | 317 cfs | → |
| South Fork Iowa River Ne Of New Providence | 384 cfs | → |
| Indian Creek Near Mingo | 845 cfs | → |
| Richland Creek Near Haven | 66 cfs | → |
| South Skunk River At Colfax | 1,460 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Iowa Noname77.
Boat launches
- Marsh Avenue Marshall County
- C Avenue Tama County
- Arney Avenue Marshall County
- Bb Avenue Tama County
- Richards Drive 2165, Tama County
- 255th Street Story County
Track Iowa Noname77 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 Iowa Noname77
Where does the data for Iowa Noname77 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 Low 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 Iowa Noname77.