Mason Dam is an earth dam located in Jasper County, Iowa, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 526 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 Mason Dam
The primary purpose of Mason Dam is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Cl Mason (private). It impounds the Tr-rock Creek near Rock Creek Lake.
The dam stands 22 feet tall and stretches 526 feet across, creates a reservoir covering 7 acres, has a maximum storage capacity of 91 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1963, the structure is well into its service life at over 50 years old.
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. The most recent inspection on record was 10/01/1964. That was over 62 years ago.
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Location
| State | Iowa |
| County | Jasper |
| Nearest City | Rock Creek Lake |
| River/Stream | Tr-rock Creek |
| Coordinates | 41.78090, -92.84250 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 526 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 91 acre-ft |
| Max Storage | 91 acre-ft |
| Normal Storage | 44 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Cl Mason |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/01/1964 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA00542 |
| Federal ID | IA00542 |
| More Info | State Dam Safety Program |