WET can help with your land development projects, which can involve several different permits and reviewing agencies.
Use the summary below to determine the permitting requirements of your proposed development.
1. A Montana Department of Environmental Quality (MDEQ) Certificate of Subdivision Approval (COSA) permit is needed if:
• your project site less than 20-acres in size and you want to build (drill a well and install an on-site wastewater system),
• sanitary restrictions have been assigned to the lot, or
• your project involves a condominium, recreational camping vehicle, or mobile home park, regardless of the size of the parcel.
This process is explained on the following website: http://www.deq.mt.gov/wqinfo/Sub/default.mcpx.
Your permit application must address the 43 items identified in the checklist. Two recent checklist additions include proof of a water right from Montana Department of Natural Resources and Conservation (DNRC) and an evaluation of the projects effects on sage grouse habitat. The minimum MDEQ review time is 60-days.
Permit preparation time is approximately four weeks.
Reviewing agency is MDEQ (state) and review time is 60-days minimum and review fees are required.
2. For developments in Silver Bow County, a Butte-Silver Bow County Septic permit is needed if:
• your project site greater than 20-acres in size and you want to build (drill a well and install an on-site wastewater system) in Silver Bow County. Note: lots greater than 20-acres in size are exempt from state review.
For detailed septic requirements in Butte-Silver Bow, contact the Butte-Silver Bow Environmental Health Department (25 W Front St, Butte, MT 59701, (406) 497-5020).
Permit preparation time is approximately three weeks.
Reviewing agency is Butte-Silver Bow Environmental Health Department (county) and review time is one week. A county septic permit fee is required.