Norlund 1 is an earth dam located in Crawford County, Iowa, built in 2005. It carries a Low hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 605 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Norlund 1
The primary purpose of Norlund 1 is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Joseph and Cherith Thelen (private). It impounds the Trib to Rocky Run Creek near East Boyer River.
The dam stands 19 feet tall and stretches 605 feet across, creates a reservoir covering 6 acres, has a maximum storage capacity of 146 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2005, the structure is relatively new.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Iowa |
| County | Crawford |
| Nearest City | East Boyer River |
| River/Stream | Trib to Rocky Run Creek |
| Coordinates | 42.06670, -95.27360 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 605 ft |
| Year Completed | 2005 (21 years old) |
Storage & Hydraulics
| NID Storage | 146 acre-ft |
| Max Storage | 146 acre-ft |
| Normal Storage | 29 acre-ft |
| Surface Area | 6 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Joseph and Cherith Thelen |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04323 |
| Federal ID | IA04323 |
| More Info | State Dam Safety Program |