All assets of the Fremont, Elkhorn & Missouri Valley and the Sioux City & Pacific railroads are taken over by the Chicago & Northwestern RR.

The Elkhorn's construction subsidiary, Wyoming Central, pushes westward from Dakota Junction. Surveys are taken across central Wyoming, through South Pass to connect with the Central Pacific at Ogden, Utah.

C&NW/Elkhorn construction progresses as far west as Casper, Wyo.

Track is extended from Casper to Shoshoni in mid 1906 by the Wyoming & Northwestern.

Track reaches Lander. During this time it is publicly acknowledged by the C&NW management of two possible destinations for extension: Coos Bay, Oregon and Eureka, California. Northwestern President Marvin Hughitt finally put all the rumors and projections to rest when he discontinued any planning on these extensions.

Tie creosoting plant opens at Riverton, Wyo.

Track from Casper to Shoshoni (Illco to Shobon) is abandoned with trackage rights granted on the CB&Q. C&NW track is taken up to be recycled for the war effort.

During this time 7,144 car loads of fuel oil are shipped out of Riverton.

1900  

June 11

  An extension built westward from Northport, NE reaches Guernsey, Wyo.

1900  

A 131-mile branch line is constructed to connect Toluca, MT to Cody, Wyo. Construction begins during  the spring of 1900 and is completed on November 11, 1901. It gives the Q access not only to Yellowstone Park but also, of more importance, to the productive Big Horn Basin.

1900   

December  

Surveys between Guernsey, Wyo. and Salt Lake City, UT. are nearly complete. If this 461-mile line were to be built, it would make a through route between Omaha and Salt Lake that is 76-miles shorter than the existing Union Pacific main line. (This was strongly recommended to Charles Perkins, then President of the Q, for the construction of this line. He sent the recommendation to the Board of Directors in Boston. They never responded.) Just think what could have been?

1905  

CB&Q comes under control of the Great Northern and Northern Pacific as a result of the Northern Securities scandal. Control of the Q shifts from Boston to St Paul.

1905 

October 3 

Construction begins southward from Frannie Junction.

1907 

September 3

 Kirby is reached, 110 miles to the south of Frannie Junction.

1909 

Work resumes from Kirby through the Wind River Canyon by way of Casper to a connection with the Colorado & Southern at Orin Junction.

1909 

Great Northern's extension of rail line southward from Great Falls to Billings, MT is completed.

1911 

April 24 

The Q completes a 30 mile extension from Warren MT. (across the state line from Frannie Wyo.) to Fromberg MT. to meet an extension built by the Northern Pacific from Billings, MT.

1911 

May 

The Toluca Branch is abandoned from Toluca, MT. to Warren, MT. 

1914 

October 18  

The completed line from Frannie Junction to Orin Junction, Wyo. is finished and opens for service.

1915 

December 15  

An eight-mile connection between Guernsey and Wendover, Wyo. is opened connecting the Q to the C&S.