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Travel information for the Shirley Basin area is as follows:

National Weather Service Forecast for Shirley Basin

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Frequently Asked Questions Closures & Advisories
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Variable Speed Limits
Chain Law
Neighboring States

District Comments
District 2 (Central) I25: Planned Closure for roadwork June 9-12, 2026 from 8pm to 6am, all lanes will be closed near Casper from milepost 180 to 196.



Conditions
Route Location Conditions Advisories Restrictions Last Report Time Cameras Sensors
WY 487 Between the South Jct WY 77 and the North Jct WY 77 Dry None None   Jun 8, 2026, 02:45 PM   Shirley Rim   Shirley Rim
Between the North Jct WY 77 and WY 220 Dry None None   Jun 8, 2026, 02:45 PM   WYO 487 / WYO 77 Junction  
WY 77 Between the South Jct WY 487 and Mile Marker 132, Northbound Closure Gate Dry None WY 77 from milepost 122.100 to 144.200
Weight restriction: 80000 lbs
  Jun 8, 2026, 02:45 PM    
Between Mile Marker 132, Northbound Closure Gate and Mile Marker 142, Southbound Closure Gate Dry None None   Jun 8, 2026, 02:45 PM    
Between Mile Marker 142, Southbound Closure Gate and the North Jct WY 487 Dry None WY 77 from milepost 122.100 to 144.200
Weight restriction: 80000 lbs
  Jun 8, 2026, 02:45 PM    

Construction Projects
Project Name Project Number WYDOT Contact Contractor Contact Start Date Completion Date Description Road Milepost(s) Surface Delays Last Updated

No active construction projects reported at this time.

*Chain Law - Level 1 Definition
**Chain Law - Level 2 Definition
Other Definitions

Impact Levels Description / Recommended Action
Low Minimal impacts expected, use general caution.
Moderate Some impacts expected, use extra caution. Stay alert for changing road and weather conditions.
High Dangerous impacts expected, use extreme caution, delay travel or consider alternate route. If travel is necessary, slow down and allow extra time.
CLOSED Per W.S. 24-1-109, motorists traveling on a closed road without permission from WYDOT or WHP may be subject to a fine of up to $750 and/or up to 30 days imprisonment.
Seasonal / Long-Duration Event Impact level used to distinguish long-duration events from emergent events.
All travelers are encouraged to check present conditions and forecasts before departing.