Wisconsin Department of Transportation

Alert: The following services will be unavailable on Saturday, January 5, 2013 from 12 a.m. (midnight) to 6 a.m. CST due to system maintenance.

US 12 Corridor Study - Environmental information

Y-intersection on US 12.

Note - WisDOT has stopped all work on the study of a future US 12 Bypass through the town of Koshkonong south of Fort Atkinson. The final disposition of the study will be determined at a future date by the Transportation Projects Commission. (May 3, 2012)

Environmental Impact Statement (EIS)

Once sufficient need to make improvements to US 12 in the Fort Atkinson area was established, WisDOT began developing an Environmental Impact Statement (EIS).

Final Environmental Impact Statement (FEIS)

FEIS will be prepared that will address comments received on the Draft EIS (DEIS). This document will also describe results of additional study of the southern bypass routes and interim improvements conducted from 2008 - 2011.

Publication of the FEIS is tentatively scheduled in early 2012. The details of WisDOT’s preferred alternative, including benefits and impacts, will be documented in the FEIS.

The FEIS will be available for public review for 30 days, after which the Federal Highway Administration can choose to release a Record of Decision, which would grant final approval of the selected alternative.

Record of Decision (ROD)

ROD is needed before the selected alternative may proceed to final design and construction.

Once the ROD is filed, then official mapping process can begin. WisDOT anticipates mapping to be completed by 2013. An interim improvement of existing US 12 is anticipated to be constructed 2016.

Draft Environmental Impact Statement (DEIS)

The DEIS was published in Oct. 2005 and circulated for public and agency comment. It explains the "no-action" alternative for a project, as well as a number of possible "build" alternatives and their benefits and impacts. A public hearing was conducted on the DEIS in Dec. 2005.

Based upon the findings of the DEIS and upon agency and public comments, WisDOT selected a course of action that includes making interim improvements to the existing system and officially mapping a southern bypass route for construction at a later date.


The complete document has been broken down into the files below with smaller file sizes to reduce download times and ease of viewing specific sections.

WisDOT environmental information

WisDOT projects and construction sometimes change the natural environment around a project area. To minimize the effects of road construction and development WisDOT works to reduce change to the natural environment and leads several efforts to restore project areas.

Top Return to top

Questions about the content of this page:
WisDOT Southwest Region Office-Madison, swr.dtsd@dot.wi.gov
Last modified: June 18, 2013

All external hyperlinks are provided for your information and for the benefit of the general public. The Wisconsin Department of Transportation does not testify to, sponsor or endorse the accuracy of the information provided on externally linked pages. Some pages contain links to other documents and media types (PDF, Word, Flash, Video, etc.) and require free plugins to work. Visit our software information page for assistance.