Illinois Dams
1,630 dams tracked by the National Inventory of Dams
Total Dams
1,630
High Hazard
251
15.4%
Poor / Unsatisfactory
6
Average Age
61 yrs
Hazard Classification
High251 (15.4%)
Significant360 (22.1%)
Low1,008 (61.8%)
Condition Assessment
Satisfactory8 (0.5%)
Fair6 (0.4%)
Poor / Unsatisfactory6 (0.4%)
Not Rated1,610 (98.8%)
Federal
48
State
68
Local
286
Private
1,153
Tallest Dams
- Refuse Disposal Area175 ft
- Shelbyville Dam138 ft
- Duck Creek Station Dams123 ft
- Devil`s Kitchen Dam121 ft
- Macoupin Energy Refuse Disposal Area 6117 ft
High Hazard Dams
Poor Condition Dams
- Whoopie CatPoor
- Arsenal Power Poor
- Dam A-41Poor
- Lake Chautauqua Upper DamPoor
- Lake Chautauqua Lower DamPoor
All Dams in Illinois
Showing 276–300 of 360
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Sam Dale Lake Dam Wayne County | 22 | 1960 | Significant | Not Available |
| Sam Parr Lake Dam Jasper County | 35 | 1970 | Significant | Not Available |
| Sandy Run Lake Dam White County | 29 | 1903 | Significant | Not Available |
| Sangamon Valley PWD PCF Dam Champaign County | 18 | — | Significant | Not Available |
| Santa Fe Lake Dam Peoria County | 57 | 1965 | Significant | Not Available |
| School Street Detention Basin Dam Tazewell County | 12 | 1996 | Significant | Not Available |
| Sherman Dam Lee County | 25 | 1991 | Significant | Not Available |
| Sherwood Forest Lake Dam Clark County | 21 | 1954 | Significant | Not Available |
| Shipman Reservoir Dam Macoupin County | 36 | 1967 | Significant | Not Available |
| Shoal Creek Structure 2 Dam Montgomery County | 38 | 1963 | Significant | Not Available |
| Silver Lake Dam Madison County | 29 | 1962 | Significant | Not Available |
| Simpson Lake Dam Johnson County | 23 | 1963 | Significant | Not Available |
| Smith Lake Dam Peoria County | 47 | 1969 | Significant | Not Available |
| Smithland Locks and Dam Livingston County | 56 | 1980 | Significant | Not Available |
| Sparta New City Reservoir Dam Randolph County | 16 | 1952 | Significant | Not Available |
| Sparta Old City Reservoir Dam Randolph County | 21 | 1917 | Significant | Not Available |
| Springfield Coal/Orient 6 /South Slurry Cell Dam Jefferson County | 54 | 1985 | Significant | Not Available |
| Spring Lake Dam Winnebago County | 10 | 1965 | Significant | Not Available |
| Spring Lake Dam McDonough County | 46 | 1927 | Significant | Not Available |
| Spring Lake Road Dam St. Clair County | 21 | 1968 | Significant | Not Available |
| Spring Valley WWTP Lagoon Dam Bureau County | 17 | — | Significant | Not Available |
| Starved Rock Lock and Dam LaSalle County | 35 | 1933 | Significant | Not Available |
| St. Charles Dam Kane County | 7 | 1918 | Significant | Not Available |
| St. Elmo Old City Reservoir Dam Fayette County | 23 | 1903 | Significant | Not Available |
| Stephen A. Forbes State Park Lake Dam Marion County | 46 | 1963 | Significant | Not Available |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.