Dams in Johnson County, Nebraska
78Total Dams
1High Hazard
8Significant
Dam Safety in Johnson County, Nebraska
Johnson County has 78 dams tracked in the National Inventory of Dams. Of these, 1 are classified as high hazard — meaning failure would probably cause loss of human life. Another 8 carry a significant hazard classification. Currently, 7 dams have a condition assessment of poor or unsatisfactory.
The average dam in Johnson County is 42 years old. The most common purpose is other. The tallest dam is Middle Big Nemaha 3 at 61 ft.
Explore more: Oldest dams in Nebraska · Tallest dams · High risk dams · Largest reservoirs
| Dam | Hazard | Condition | Height (ft) | Purpose | Year |
|---|---|---|---|---|---|
| Middle Big Nemaha 96 | High | Satisfactory | 60 | Flood Risk Reduction | 1991 |
| Middle Big Nemaha 18 | Significant | Satisfactory | 56 | Flood Risk Reduction | 2003 |
| Middle Big Nemaha 88 | Significant | Satisfactory | 56 | Flood Risk Reduction | 2001 |
| Middle Big Nemaha 12 | Significant | Satisfactory | 54 | Flood Risk Reduction | 2000 |
| Spring Creek 11-a 1296 | Significant | Fair | 51 | Flood Risk Reduction | 1978 |
| Upper Big Nemaha 1-b41 | Significant | Satisfactory | 46 | Flood Risk Reduction | 1982 |
| Spring Creek 9-a 641 | Significant | Satisfactory | 35 | Flood Risk Reduction | 1973 |
| Long Branch 71 | Significant | Satisfactory | 32 | Flood Risk Reduction | 1980 |
| Upper Big Nemaha J-37 | Significant | Satisfactory | 27 | Other | 1969 |
| Middle Big Nemaha 3 | Low | Satisfactory | 61 | Flood Risk Reduction | 2000 |
| Middle Big Nemaha 46 | Low | Fair | 59 | Flood Risk Reduction | 1995 |
| Middle Big Nemaha 4 | Low | Satisfactory | 56 | Flood Risk Reduction | 2003 |
| Upper Big Nemaha 20-a | Low | Satisfactory | 50 | Flood Risk Reduction | 1980 |
| Upper Big Nemaha 3-a | Low | Satisfactory | 49 | Flood Risk Reduction | 1985 |
| South Branch 63 | Low | Satisfactory | 46 | Flood Risk Reduction | 1994 |
| Spring Creek 5-a | Low | Satisfactory | 45 | Flood Risk Reduction | 1970 |
| Middle Big Nemaha 9 | Low | Satisfactory | 44 | Flood Risk Reduction | 1995 |
| Upper Big Nemaha J-12 | Low | Fair | 44 | Other | 1980 |
| Upper Big Nemaha 18-a | Low | Satisfactory | 43 | Flood Risk Reduction | 1970 |
| Upper Big Nemaha 20-b | Low | Satisfactory | 42 | Flood Risk Reduction | 1973 |
| Klaus Hartmann Dam | Low | Satisfactory | 40 | Flood Risk Reduction | 2004 |
| Schaardt Irrigation Dam | Low | Satisfactory | 40 | Irrigation | 2016 |
| Upper Big Nemaha 20-c | Low | Satisfactory | 40 | Other | 1980 |
| South Branch 12 | Low | Satisfactory | 39 | Flood Risk Reduction | 1994 |
| Spring Creek 6-a | Low | Poor | 39 | Flood Risk Reduction | 1978 |
| Upper Big Nemaha J-28 | Low | Satisfactory | 38 | Other | 1978 |
| Upper Big Nemaha J-44 | Low | Satisfactory | 38 | Other | 1982 |
| Meisinger Dam 3 | Low | Fair | 37 | Fire Protection, Stock, Or Small Fish Pond | 2003 |
| Long Branch 2 | Low | Satisfactory | 37 | Flood Risk Reduction | 1980 |
| Upper Big Nemaha J-32 | Low | Satisfactory | 37 | Other | 1978 |
| South Branch 27 | Low | Satisfactory | 37 | Flood Risk Reduction | 1994 |
| Upper Big Nemaha 2-a | Low | Satisfactory | 37 | Flood Risk Reduction | 1972 |
| Lonnie Pooch Pond Dam | Low | Satisfactory | 36 | Other | 2010 |
| Spring Creek 9-6 | Low | Satisfactory | 36 | Other | 1973 |
| Milton Buchholz Grade Control Dam | Low | Satisfactory | 35 | Other | 2015 |
| Long Branch 3 | Low | Satisfactory | 35 | Flood Risk Reduction | 1980 |
| Upper Big Nemaha J-36 | Low | Satisfactory | 35 | Other | 1983 |
| Spring Creek 7-b | Low | Satisfactory | 34 | Flood Risk Reduction | 1971 |
| Wellensiek Dam | Low | Satisfactory | 34 | Fire Protection, Stock, Or Small Fish Pond | 1959 |
| Spring Creek 8-a | Low | Satisfactory | 33 | Flood Risk Reduction | 1976 |
| Spring Creek 7-c | Low | Poor | 33 | Flood Risk Reduction | 1971 |
| Spring Creek 4-1 | Low | Satisfactory | 33 | Other | 1968 |
| Spring Creek 9-5 | Low | Satisfactory | 33 | Other | 1968 |
| 2008 Hartmann Dam | Low | Fair | 32 | Other | 2008 |
| Meisinger Dam 2 | Low | Satisfactory | 31 | Fire Protection, Stock, Or Small Fish Pond | 2001 |
| Semm Grade Stabilization Dam | Low | Poor | 31 | Other | 1994 |
| South Branch 13 | Low | Satisfactory | 30 | Flood Risk Reduction | 1994 |
| Spring Creek 5-2 | Low | Satisfactory | 30 | Other | 1967 |
| Spring Creek 6-2 | Low | Satisfactory | 30 | Other | 1971 |
| Upper Big Nemaha J-34 | Low | Satisfactory | 30 | Other | 1969 |
| Upper Big Nemaha J-40 | Low | Satisfactory | 29 | Other | 1967 |
| Brinkman Dam | Low | Satisfactory | 29 | Other | 2007 |
| Upper Big Nemaha J-15 | Low | Satisfactory | 29 | Other | 1985 |
| Upper Big Nemaha J-45 | Low | Satisfactory | 29 | Other | 1980 |
| Upper Big Nemaha J-42 | Low | Satisfactory | 29 | Other | 1972 |
| Baum Dam | Low | Poor | 28 | Flood Risk Reduction | 1980 |
| Rosenthal Dam | Low | Poor | 28 | Other | 1954 |
| Upper Big Nemaha J-12a | Low | Satisfactory | 28 | Other | 1973 |
| Meisinger Dam 1 | Low | Satisfactory | 27 | Other | 2002 |
| Heusman Dam | Low | Not Rated | 26 | Other | 1960 |
| Spring Creek 8-1 | Low | Satisfactory | 26 | Other | 1970 |
| Upper Big Nemaha J-15a | Low | Satisfactory | 26 | Other | 1973 |
| Rothell Dam | Low | Satisfactory | 25 | Other | 2002 |
| Little Dam 3322 | Low | Not Rated | 25 | Flood Risk Reduction | 1980 |
| Hippen Dam | Low | Satisfactory | 25 | Other | 2004 |
| Bartels Dam 2 | Low | Poor | 25 | Irrigation | 1978 |
| Spring Creek 10-1 | Low | Fair | 25 | Other | 1978 |
| Spring Creek 9-2 | Low | Satisfactory | 25 | Other | 1968 |
| Spring Creek 9-3 | Low | Satisfactory | 25 | Other | 1978 |
| Spring Creek 9-4 | Low | Satisfactory | 25 | Other | 1973 |
| Hartmann Dam 3892 | Low | Satisfactory | 24 | Recreation | 2016 |
| Spring Creek 5-3 | Low | Poor | 24 | Other | 1968 |
| Spring Creek 4-3 | Low | Satisfactory | 24 | Other | 1968 |
| Spring Creek 2-3 | Low | Satisfactory | 24 | Other | 1970 |
| Spring Creek 3-1 | Low | Satisfactory | 24 | Other | 1976 |
| Dave Borrenpohl Dam | Low | Satisfactory | 23 | Flood Risk Reduction | 2008 |
| Robison Dam | Low | 23 | Irrigation | 2023 | |
| Upper Big Nemaha J-11 | Low | Satisfactory | 22 | Other | 1980 |