Exhibit 3.131

CERTIFICATE OF FORMATION

OF

COUGAR EMPLOYMENT RESOURCES, LLC

1. The name of the limited liability company is Cougar Employment Resources, LLC.

2. The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company.

3. This Certificate of Formation shall be effective immediately upon filing with the Secretary of State of Delaware.

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation as of this 14^th day of November, 2008,

By:	/s/ Edward L. Sullivan
	Edward L. Sullivan Authorized Person

CERTIFICATE OF AMENDMENT

TO CERTIFICATE OF FORMATION OF

COUGAR EMPLOYMENT RESOURCES, LLC

1. The name of the limited liability company is:

Cougar Employment Resources, LLC

2. Article 1 of the Certificate of Formation of the limited liability company is hereby amended to read in its entirety as follows:

“The name of the limited liability company is Peabody Colorado Services, LLC”

3. This Certificate of Amendment shall be effective immediately upon filing with the Secretary of State of the State of Delaware.

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Amendment this 10^th day of December, 2008.

Peabody Services Holding, LLC its Sole Member
By:	/s/ Kenneth L. Wagner
	Kenneth L. Wagner Its: Assistant Secretary