Alberta Utilities Commission

ATCO Gas and Pipelines Ltd. (South) (ATCO), by Application 21461-A001 registered
on March 24, 2016, filed an application with the Alberta Utilities Commission under Section 12
of the Pipeline Act and Section 4.1 of the Gas Utilities Act for the following in the Calgary area:
amendment of pipe type of lines 1, 9, 22, 37, 38, 42, 45, 53 and 56 from “Z245.1” to
“A106”
amendment of pipe grade of lines 1, 9, 22, 37, 38, 42, 45, 53 and 56 from “290” to “C”
amendment of wall thickness of lines 1, 9, 22, 37, 38, 42, 45, 53 and 56 from
“5.6 millimetres” to “6.4 millimetres”