Flood Control Dams in Iowa

Iowa has 427 flood control dams, of which 56 carry a high hazard classification. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate.

#	Dam	County	Height (ft)	Hazard	Condition	Year
1	Saylorville Dam	Polk	125	High	Not Available	1975
2	Rathbun Dam	Appanoose	100	High	Not Available	1969
3	Big Creek Terminal Dam	Polk	95	Low	Not Available	1972
4	Big Creek Barrier Dam	Polk	84	High	Not Available	1974
5	Big Creek Diversion Dam	Polk	80	High	Not Available	1970
6	Pony Creek Watershed Site 21	Mills	75	High	Satisfactory	1971
7	Pleasant Creek Lake Dam	Linn	73	High	Satisfactory	1977
8	Waubonsie Cr. Watershed Site 11-1	Mills	71	Significant	Satisfactory	1977
9	Bacon Creek Watershed Site A-3	Woodbury	69	High	Satisfactory	1978
10	Twelve Mile Creek Watershed Site M-1	Union	66	High	Satisfactory	1983
11	Indian Creek Watershed Site 2	Pottawattamie	65	High	Satisfactory	1975
12	Smokey Hollow Subwatershed Site 4	Woodbury	64	High	Poor	1985
13	Bacon Creek Watershed Site A-2	Woodbury	64	Low	Not Rated	1978
14	Three Mile Reservoir Dam	Union	63	Significant	Satisfactory	1995
15	North Pigeon Cr Watershed Site M-1	Pottawattamie	62	Significant	Satisfactory	1993
16	Little River Watershed Site M-1	Decatur	61	High	Satisfactory	1984
17	North Pigeon Cr Watershed Site 10-1	Pottawattamie	59	Low	Not Rated	1990
18	Smokey Hollow Subwatershed Site 1	Woodbury	59	High	Satisfactory	1986
19	Bacon Creek Watershed Site H-2-1	Woodbury	59	Significant	Satisfactory	1981
20	Rager Dam	Harrison	58	Low	Not Rated	2011
21	Bacon Creek Watershed Site A-1	Woodbury	58	Low	Not Rated	1978
22	Smokey Hollow Subwatershed Site 3	Woodbury	58	High	Satisfactory	1986
23	Lake Icaria Dam (site M-1-a Walters Cr)	Adams	56	Significant	Satisfactory	1974
24	Hamburg Watershed Site M-1	Fremont	55	High	Satisfactory	1961
25	Bacon Creek Watershed Site A-2-1	Woodbury	55	Significant	Poor	1978
26	Bacon Creek Watershed Site H-3-1	Woodbury	55	Significant	Satisfactory	1984
27	Bacon Creek Watershed Site H-1	Woodbury	54	Significant	Satisfactory	1984
28	Bacon Creek Watershed Site L-1	Plymouth	53	Low	Not Rated	1976
29	Bacon Creek Watershed Site J-3	Woodbury	53	Significant	Satisfactory	1989
30	Bacon Creek Watershed Site A-2-2	Woodbury	51	Significant	Fair	1978
31	Bacon Creek Watershed Site H-2-2	Woodbury	51	Significant	Satisfactory	1981
32	Bacon Creek Watershed Site A-2-4	Woodbury	51	High	Satisfactory	1979
33	Bacon Creek Watershed Site J-2	Woodbury	50	Low	Not Rated	1988
34	Bacon Creek Watershed Site A-3-1	Woodbury	50	High	Satisfactory	1978
35	Pikes Peak Flood Control Dam	Clayton	49	High	Satisfactory	1938
36	Kasparbauer	Harrison	49	Low	Not Rated	2012
37	Johnson (oscar) Dam	Harrison	49	Low	Not Rated	2011
38	Pony Creek Watershed Site 30	Mills	49	Significant	Satisfactory	1964
39	Waubonsie Cr. Watershed Site 3-3	Mills	49	Significant	Satisfactory	1993
40	Natural Milk Dam	Shelby	49	Low	Not Rated	2006
41	Smokey Hollow Subwatershed Site 2	Woodbury	49	High	Fair	1986
42	Covered Bridge Estates Dam	Madison	47	High	Satisfactory	2005
43	Bacon Creek Watershed Site A-2-3	Woodbury	47	Significant	Poor	1978
44	Leutzinger-lowe Watershed Site M-1	Muscatine	46	Significant	Satisfactory	1971
45	Bacon Creek Watershed Site L-3	Woodbury	46	Low	Not Rated	1976
46	Bacon Creek Watershed Site J-1	Woodbury	46	Significant	Satisfactory	1984
47	Bacon Creek Watershed Site H-3-2	Woodbury	46	Significant	Satisfactory	1984
48	Davids Creek Watershed Site 1b-2	Audubon	45	High	Fair	1977
49	Littlefield Lake Dam	Audubon	45	High	Satisfactory	1977
50	Soap Creek Watershed Site 26-44	Davis	45	Low	Not Rated	2003
51	Little River Watershed Site 65	Decatur	45	Significant	Fair	1987
52	Lakeside Development Dam	Linn	45	Significant	Satisfactory	2005
53	Siegel Flood Control Dam	Clayton	43	High	Satisfactory	1938
54	Held Watershed Site E-3	Plymouth	43	High	Poor	1978
55	Twenty-sixth Street Stormwater Detention Basin	Polk	43	High	Satisfactory	2007
56	Jefferson Park Watershed Site 5	Wapello	43	High	Satisfactory	1985
57	Little Paint Creek Watershed Site 206a	Allamakee	42	Low	Not Rated	2005
58	Turkey Cr Watershed Site 55d	Cass	42	Significant	Satisfactory	1994
59	Burkhart Dam	Harrison	42	Low	Not Rated	2010
60	Harper Century Farm Dam	Harrison	42	Low	Not Rated	2011
61	Zaugg Dam	Pocahontas	42	Low	Poor	1998
62	Jefferson Park Watershed Site 3	Wapello	42	High	Satisfactory	1976
63	Zellmer Subwatershed Site J-1a	Woodbury	42	Low	Not Rated	2002
64	Slaughter Flood Control Dam	Clayton	41	High	Fair	1938
65	Cleveland Dam	Harrison	41	Low	Not Rated	2011
66	Winner Dam	Harrison	41	Low	Not Rated	2011
67	Koski Dam	Harrison	41	Low	Not Rated	2011
68	Soap Creek Watershed Site 68-80	Monroe	41	Low	Not Rated	2009
69	West Lakes Office Park Dam	Polk	41	High	Satisfactory	1990
70	Blockton Watershed Site S-5	Taylor	41	Significant	Satisfactory	1993
71	Bacon Creek Watershed Site C-1	Woodbury	41	High	Satisfactory	1976
72	Heisler Subwatershed Site 2-1	Woodbury	40	Low	Not Rated	2004
73	Bacon Creek Watershed Site H-1-2	Woodbury	40	Significant	Not Rated	1981
74	Bacon Creek Watershed Site H-1-1	Woodbury	40	Significant	Fair	1981
75	Davids Creek Watershed Site 1a-3	Audubon	39	Low	Satisfactory	1977
76	Virden Creek Dam	Black Hawk	39	High	Satisfactory	1979
77	Straight Dam	Harrison	39	Low	Not Rated	2011
78	Ryan Henschal Watershed Site A-2	Pottawattamie	39	Low	Not Rated	1976
79	Mill Picayune Watershed Site N-2	Shelby	39	Significant	Satisfactory	1972
80	Soap Creek Watershed Site 90-85	Wapello	39	Low	Not Rated	2011
81	Bacon Creek Watershed Site K-1	Woodbury	39	Low	Not Rated	1976
82	Kruger Dam	Greene	38	Low	Not Rated	2013
83	Mill Picayune Watershed Site B-3	Harrison	38	High	Satisfactory	1962
84	Soap Creek Watershed Site 68-33a	Monroe	38	Low	Not Rated	2012
85	Sulentic Dam	Pottawattamie	38	Low	Not Rated	2002
86	Soap Creek Watershed Site 90-79b	Wapello	38	Low	Not Rated	2007
87	Soap Creek Watershed Site 26-38	Davis	37	Low	Not Rated	2003
88	Soap Creek Watershed Site 26-127	Davis	37	Low	Not Rated	2009
89	Soap Creek Watershed Site 26-63	Davis	37	Low	Not Rated	2004
90	North Branch Ralston Creek Dam	Johnson	37	High	Satisfactory	1983
91	Soap Creek Watershed Site 68-68	Monroe	37	Low	Not Rated	2006
92	Held Watershed Site E-4	Plymouth	37	High	Poor	1978
93	Bear Creek Watershed Site 21	Winneshiek	37	Low	Not Rated	2011
94	Soap Creek Watershed Site 4-90a	Appanoose	36	Low	Not Rated	2011
95	Turkey Cr Watershed Site 59d-2	Cass	36	Significant	Fair	1980
96	Swaim Dam	Davis	36	Low	Not Rated	2016
97	Cohrs Dam	Harrison	36	Low	Not Rated	2011
98	Soap Creek Watershed Site 68-56	Monroe	36	Low	Not Rated	2003
99	Twelve Mile Creek Watershed Site D-44-1	Union	36	Low	Not Rated	2008
100	Twelve Mile Creek Watershed Site D-41-a-5	Union	36	Low	Not Rated	2006

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