Mainstream is excited to be partnered with the Harrison County Community Foundation to build and maintain approximately a 115 mile fiber optic ring. This ring will be the backbone to grow fiber optic broadband coverage throughout Harrison County. Please check back for project and map updates. All proposed routes are tentative and subject to change.
Red = Existing Fiber
Yellow = Mainstream internal expansion project
Blue = Proposed partnership expansion (subject to change)
Harrison County zone mapping
Expansion Zone Information