| Business | Phone |
| Big D Electric 1203 Barton St, Eldorado 62930 | (618) 273-8055 |
| Donco Construction Inc 1506 Us Highway 45 N, Eldorado 62930 | (618) 273-7717 |
| General Electric Carbon Prod Dewey Rd, Eldorado 62930 | (618) 273-3229 |
| Lary's Electric 2200 Locust St, Eldorado 62930 | (618) 273-5737 |
| Sargent's Electric 195 Jacob Rd, Eldorado 62930 | (618) 273-3098 |