Exhibit 3.523

STATE OF DELAWARE
CERTIFICATE OF LIMITED PARTNERSHIP

•	The Undersigned, desiring to form a limited partnership pursuant to the Delaware Revised Uniform Limited Partnership Act, 6 Delaware Code, Chapter 17, do hereby certify as follows:
•	First: The name of the limited partnership is Giles Road Landfill TX, LP.
•	Second: The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street in the city of Wilmington ZIP Code: 19801. The name of the Registered Agent at such address is The Corporation Trust Company.
•	Third: The name and mailing address of each general partner is as follows:
	Allied Waste Landfill Holdings, Inc. 15880 N Greenway-Hayden Loop, Suite 100 Scottsdale, AZ 85260
•	In Witness Whereof, the undersigned has executed this Certificate of Limited Partnership as of 23rd day of August, A.D, 2005.

By:	/s/ Jo Lynn White
		General Partner
Name:		Jo Lynn White, Secretary of GP
		(type or print name)