Exhibit 3.727

CERTIFICATE OF FORMATION

OF

POLK COUNTY LANDFILL, LLC

     Pursuant to § 18-201, Delaware Code Annotated, the undersigned states as follows:

     1. The name of the limited liability company is Polk County Landfill, 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.

     IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation of Polk County Landfill, LLC this 11^th day of July, 2001.

ALLIED WASTE NORTH AMERICA, INC., a Delaware corporation, Sole Member
By:	Steven M. Helm
	Steven M. Helm

DEOSS — 5/5/00 CT System Online STATE OF DELAWARE
SECRETARY OF STATE
DIVISION OF CORPORATIONS
FILED 02:00 PM 07/11/2001
010335005 — 3413497