Water Supply Dams in Montana

Montana has 39 water supply dams, of which 10 carry a high hazard classification. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area.

#	Dam	County	Height (ft)	Hazard	Condition	Year
1	Basin Creek Dam #1	Silver Bow	101	High	Satisfactory	1897
2	Cedar Creek	Flathead	93	High	Satisfactory	1971
3	Moulton Creek Dam #1	Silver Bow	67	High	Satisfactory	1907
4	Flower Creek Dam	Lincoln	59	High	Satisfactory	2016
5	Chessman Main Dam	Lewis and Clark	57	High	Fair	1908
6	No. Decker Flood Control Reservoir No. 2	Big Horn	52	Significant	Fair
7	Basin Creek Dam #2	Silver Bow	49	Significant	Poor	1907
8	Northern Pacific Reservoir Dam	Jefferson	35	High	Not assessed	1935
9	Deadmans Basin Water Supply Canal Storage Reservoir #2	Wheatland	33	Low	Not assessed
10	Scott Reservoir	Lewis and Clark	32	High	Fair	1952
11	Big Lake	Missoula	30	Significant	Not assessed	1915
12	Rock Creek Lake	Powell	30	Significant	Not assessed	1960
13	Loubren Incorporated #1	Toole	30	Low	Not assessed	1940
14	Deadmans Basin Water Supply Canal Storage Reservoir #5	Wheatland	30	Significant	Not assessed
15	Jessup Mill Pond Dam	Flathead	28	High	Satisfactory	1941
16	Deadmans Basin Water Supply Canal Storage Reservoir #6	Wheatland	28	Low	Not assessed
17	Chessman Saddle Dam	Jefferson	27	High	Satisfactory	1908
18	Lester Peters #1	Toole	27	Low	Not assessed	1958
19	Meyer's Dam	Deer Lodge	25	Low	Not assessed	1902
20	Little Lake	Missoula	25	Significant	Not assessed	1912
21	Deep Coulee	Petroleum	25	Low	Not assessed	1971
22	26n9e22	Chouteau	22	Low	Not assessed
23	Fred Burr Lake (granite)	Granite	21	High	Satisfactory	1930
24	Muddy Spots	Cascade	20	Low	Not assessed	1938
25	Wilson #1 (toole)	Toole	20	Low	Not assessed	1935
26	Br-57	Blaine	18	Low	Not assessed	1942
27	North Fork Red Lodge Reservoir	Carbon	18	Low	Not assessed	1920
28	Gollaher #2	Cascade	18	Low	Not assessed	1930
29	Spun	Cascade	15	Significant	Not assessed	1960
30	Otilalda	Pondera	15	Low	Not assessed	1960
31	G N R R Dunkirk Reservoir	Toole	14	Significant	Not assessed	1889
32	Glacier Lake Dam	Missoula	12	Significant	Not assessed	1915
33	Sanders Lake Dam #1 North	Missoula	10	Significant	Not assessed	1913
34	Townsend Sewage Lagoon	Broadwater	9	Low	Not assessed	1962
35	Hearst Lake	Deer Lodge	9	Low	Not assessed	1898
36	R Downs #10	Big Horn	8	Low	Not assessed	1950
37	Harlem Water Supply	Blaine	8	Low	Not assessed	1960
38	Maddox Ranch Corporation #1	Blaine	7	Low	Not assessed	1960
39	Mckinley Lake	Missoula	7	Significant	Not assessed	1923

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