Low Hazard Dams
No probable loss of human life and low economic/environmental losses expected.
| Dam Name | Hazard | Height | Built | Type | State |
|---|---|---|---|---|---|
| Ziegler Creek Z-5-1 Otoe | Low Hazard | 29 ft | 1968 | Earth | Nebraska |
| Ziegler Creek Z-5-3 Otoe | Low Hazard | 33 ft | 1968 | Earth | Nebraska |
| Ziegler Creek Z-5-4 Otoe | Low Hazard | 29 ft | 1969 | Earth | Nebraska |
| Ziegler Creek Z-6-2 Otoe | Low Hazard | 24 ft | 1967 | Earth | Nebraska |
| Ziegler Dam Harlan | Low Hazard | 18 ft | 1955 | Earth | Nebraska |
| Ziegler Dam; John Hettinger | Low Hazard | 15 ft | 2000 | Earth | North Dakota |
| Ziegler Farm Dam Franklin | Low Hazard | 21 ft | 1960 | Earth | Nebraska |
| Ziegler Farms Dam Webster | Low Hazard | 19 ft | 1960 | Earth | Nebraska |
| Ziemer Dam Roberts | Low Hazard | 32 ft | 1998 | Earth | South Dakota |
| Ziff Dam Pitkin | Low Hazard | 23 ft | 1992 | Earth | Colorado |
| Zimmer Dd No I Brown | Low Hazard | 34 ft | 1954 | Earth | Kansas |
| Zimmerman Dam Scotland | Low Hazard | 25 ft | 1995 | Earth | Missouri |
| Zimmerman Dam Warren | Low Hazard | 27 ft | 1998 | Earth | Iowa |
| Zimmerman Dam Sioux | Low Hazard | 14 ft | 1904 | Earth | Nebraska |
| Zimmerman Lake Larimer | Low Hazard | 10 ft | 1913 | Earth | Colorado |
| Zimmerman Lake Dam Moniteau | Low Hazard | 20 ft | 1976 | Earth | Missouri |
| Zimmerman Pond Dam Lexington | Low Hazard | 16 ft | 1935 | — | South Carolina |
| Zimmerman Retention Dam #1 Petroleum | Low Hazard | — | 2003 | Gravity | Montana |
| Zinger #1 Richland | Low Hazard | 16 ft | 1960 | Earth | Montana |
| Zion Lake Dam Harrison | Low Hazard | 37 ft | 1963 | Earth | Ohio |
| Zion Lake Dam Jennings | Low Hazard | 21 ft | 1957 | Earth | Indiana |
| Zip 4876-15 Fresh Water #1 Campbell | Low Hazard | 27 ft | 2023 | Earth | Wyoming |
| Zittrouer Pond Dam Effingham | Low Hazard | 15 ft | — | Earth | Georgia |
| Zobisch Caddo | Low Hazard | 30 ft | 1953 | Earth | Oklahoma |
| Zoglmann Reservoir Harney | Low Hazard | 28 ft | 1963 | Earth | Oregon |
| Zoldan Pond Dam Mahoning | Low Hazard | 31 ft | 2003 | Earth | Ohio |
| Zonia Southwest Holding Tank Yavapai | Low Hazard | 42 ft | — | Earth | Arizona |
| Zorc Bros. No.2 Ziebach | Low Hazard | 26 ft | 1962 | Earth | South Dakota |
| Zorc Bros. No.3 Ziebach | Low Hazard | 17 ft | 1950 | Earth | South Dakota |
| Z Ranch Lake Dam McCulloch | Low Hazard | 18 ft | 1979 | Earth | Texas |
| Zuber Hollow Reservoir Chaves | Low Hazard | 20 ft | 1928 | Earth | New Mexico |
| Zuehlke Lake Dam Washington | Low Hazard | 16 ft | 1967 | Earth | Texas |
| Zumwalt's Dam Hempstead | Low Hazard | 18 ft | 1984 | Earth | Arkansas |
| Zupan Lake Dam Ashland | Low Hazard | 31 ft | 2000 | Earth | Ohio |
| Zurbuchen Lake Dam Clinton | Low Hazard | 33 ft | 1976 | Earth | Missouri |
| Zvejnieks Lake Dam Carroll | Low Hazard | 25 ft | 1958 | Earth | Georgia |
| Zvolanek Dam Gage | Low Hazard | 30 ft | 2004 | Earth | Nebraska |
| Zwiener Dam Buffalo | Low Hazard | 28 ft | 1961 | Earth | Nebraska |
| Zylstra Dam No 2 San Juan | Low Hazard | — | 1963 | Earth | Washington |
| Zysset Dam Frontier | Low Hazard | 22 ft | 1974 | Earth | Nebraska |