Wyoming Department of Transportation

NEPA Documents

Casper West Belt

The project would consist of a new highway between State Highway 220 and US 20/26 west of the City of Casper (Figure 1-2). The southern terminus would be on Highway 220, approximately three miles southwest of Robertson Road. The northern terminus would be at the intersection of US 20/26 (Shoshoni Bypass) and Business 20/26. The two-lane highway would be approximately 7.5 miles in length and would meet current design standards for a typical rural highway.

Grading and Structures Plans (Large file 36MB/250 pages)

Cody to Powell

This Environmental Assessment addresses improvements to US 14A, between Cody and Powell, Wyoming. The primary need for improvements is to address the growing traffic volumes along US 14A as well as to arrest the growing number of crashes and the crash rate.

Douglas Streets - Richards Street and 4th Street

The Wyoming Department of Transportation (WYDOT), in coordination with The Federal Highway Administration (FHWA), has down-scaled the scope of the road improvements that were being studied in the City of Douglas Environmental Assessment FHWA-WY-EA-08-03, 4th and Richards streets, Converse County, Wyoming. The project has been down-scaled based on available funding and consists mainly of milling and re-paving the existing within the existing right of way along with modifications at Interstate- 25 (1-25) interchange to improve access to WYDOT's proposed maintenance facility near I -25.
As a result of these changes, WYDOT and FHWA have determined that the project is categorically excluded from further documentation under the National Environmental Policy Act (NEPA). The rationale for this decision is the lack of improvements and resulting impacts outside of the right of way. The environmental impacts associated with the project have been documented and serve as the basis for the NEPA decision that is being made.
Three categorical exclusions were completed for the above project.
Letter to Mayor of Douglas indicating the down-scaled scope of the road improvement

Highway 59 South

The proposed improvements span a 28-mile section of WYO 59 from just south of the Town of Wright and State Highway 450 to just north of Bishop Road, about 10 miles south of the City of Gillette, in Campbell County, Wyoming. 

Jackson South

The Jackson South Record of Decision (ROD) is completed. The ROD indicates the decision or selected alternative, alternatives considered, clarifications on the final Environmental Impact Statement (EIS), and addresses the comments received on the final EIS. The ROD Appendix A covers public involvement and Appendix B addresses each individual comment received on the final EIS. Final 

Environmental Impact Statement (EIS)

EIS Appendices

A - Agency Coordination

B - Wildlife Species Potential Occurring in the Greater Study Area

C - U.S. Forest Service: Snake River Wild and Scenic River Eligibility Analysis White paper and Related Correspondence 

D - Draft EIS Comments and Responses

E - Teton County Alternative Analysis

Laramie South

The Wyoming Department of Transportation plans to make improvements to a 21-mile section of Highway 287 (US 287) in Albany County from Laramie, Wyoming to the Colorado state line to improve safety and mobility along this section of highway. US 287 is a principal arterial that provides an important connection between Laramie and Fort Collins, Colorado. US 287 is heavily used by Laramie residents, local residents living along the corridor, as well as by regional travelers and recreationists from other parts of the state and Colorado.

Torrington Urban Project

The proposed project would improve US 85, US 26 and US 26-85 in Torrington. Proposed improvements include reconstruction and widening of US 26-85 and US 26, developing a continuous sidewalk system along US 26 and US 26-85, improving the existing storm drainage system on US 26 and US 26-85, and the realignment of US 85 with a grade separated crossing of the BNSF Railway tracks. The No-Build alternative and one Build alternative (the Preferred Alternative) were analyzed in the Environmental Assessment (EA).
The Finding of No Significant Impact (FONSI) was completed on Feb. 4, 2008

Lewis Street Bridge

The proposed project would replace the Lewis Street Bridge over the Little Goose Creek in Sheridan, Wyoming. The proposed project would also include improvements to Lewis Street, closing the south end of the Marion Street connection to Lewis Street and closing the Alger Street connection to Lewis Street . A portion of Marion Street would become a parking area. A bike path connecting to the existing bike path system would be constructed. The No-Build alternative and one Build alternative (the Preferred Alternative) were analyzed in detail in the Environmental Assessment (EA). A Section 4(f) evaluation is provided in this document. The 4{f) evaluation determined a no use for any 4(f) historic properties and a net benefit for the 4(f) park located in the project area.

Environmental Assessment

Finding of No Significant Impact

WYO 220 - Muddy Gap to Casper EA

WYDOT proposes to reconstruct two adjacent sections of WYO-220: Muddy Gap to Casper, Casper South and Narrows section in Natrona County, Wyoming. The two sections total approximately 12 miles in length.

Harney Street Viaduct

The Harney Street Viaduct Environmental Assessment was completed and signed by FHWA and WYDOT on September 12, 2012.  The Finding of No Significant Impact (FONSI) was signed on December 31, 2012.
The Environmental Assessment, Appendices, and FONSI can be viewed by using the links below.

Rupe Hill Landslide

The Wyoming Department of Transportation (WYDOT) in coordination with the Federal Highway Administration (FHWA) has evaluated the impacts of realigning a segment of U.S. Highway (US 14) to address landslide concerns near Rupe Hill. The impacts and mitigation measures are described and documented in the environmental assessment (EA) dated June 2013. The EA was approved on June 14, 2013. The 30-day public and agency review period began on June 25, 2013, and ended on August 2, 2013.

The EA and this Finding of No Significant Impact (FONSI) were prepared in compliance with The National Environmental Policy Act (NEPA) and other applicable laws, Executive Orders, and related requirements. As required by NEPA, an environmental analysis was conducted, potential impacts associated with the proposed Project were documented, and mitigation measures were determined. No significant impacts were identified during the course of this environmental analysis.

Environmental Assessment with Appendices

Supporting Reports

Paleontological Report

Burgess Junction South - US 14

The Project is located on US 14 and US 14A, beginning at the Sheridan - Big Horn County line, extending north for approximately 10 miles, and ending at the northeast limits of Burgess Junction (intersection of US 14 and U.S. Highway 14 Alternate [US 14A]).

Hoback Junction EA

The Wyoming Department of Transportation (WYDOT) proposes improvements to a 0.6-mile section of U.S. Highway 26/89, between milepost (MP) 141.4 and 140.7, including the U.S. 26/89, U.S. 189/191, and U.S. 26/89/189/191 intersection and the Snake River Bridge immediately southwest of the Hoback Junction community.

North Sheridan Interchange

The proposed project includes reconstruction and potentially relocation the North Sheridan Interchange, improvements to I-90, and improvements to North Main Street. The North Sheridan Interchange is the first interchange serving the City of Sheridan, Wyoming for eastbound vehicles on I-90 and the last interchange for westbound vehicles on I-90.
Environmental Assessment
Finding of No Significant Impacts


Supporting Documents

Final Plans (Draft)

Etna North - US 89

The Wyoming Department of Transportation (WYDOT) is planning on improving a section of US 89 and has completed the Environmental Assessment and it is available for public review. WYDOT will have a comment period (typically 30 days) that is expected to start on September 28, 2015. During this comment period WYDOT will also host a public meeting. The public meeting date, time and location is still being determined. 

Additional information can be found at www.etna-north.com



Highway 59 North Realignment

Alpha Coal West, Inc. (Alpha) submitted a proposal to the Wyoming Department of Transportation (WYDOT) to relocate approximately 4.35 miles of Wyoming Highway 59 (WYO 59) to allow mining operations in the vicinity of Eagle Butte Mine to continue (Figure 1). The project is known as the WYO 59 relocation project. Alpha is financially responsible for the cost associated with evaluating, designing, and constructing the relocated road. WYDOT is responsible for approving the location of the relocated road segment and overseeing design and construction. No federal or state of Wyoming (State) funds will be used to relocate the highway. To support the decision-making process associated with potentially relocating WYO 59, WYDOT completed an environmental review and engineering feasibility study of the proposed road relocation. The study included obtaining input from affected stakeholders and the residents of Campbell County. The results of the environmental review and associated stakeholder outreach are documented in this Environmental Overview Report and Feasibility Study.

Environmental Overview Report and Feasibility Study 

Feasibility Determination

Thayne North
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