Mr. Richard T. Logan — Pipeline Safety Interpretation

Page 1PI-74-0146 November 13, 1974 Mr. Richard T. Logan Professional Engineer P.O. Box 456 Matches, MS 39120 Dear Mr. Logan: This responds to your letter of October 10, 1974, advising that a paved road will be constructed 110 feet above a buried gas transmission line without disturbing the line. You ask what effect the construction will have on the pipeline respecting requirements for (1) encasement, (2) class location, and (3) operating pressure in 49 CFR Part 192. Because the existing pipeline will not be replaced, relocated or otherwise changed due to construction of the road, the Federal gas pipeline safety standards concerning encasement would not apply. The class location of the pipeline as determined by 49 CFR 192.5 would not be changed as a result of the construction. Because operating pressure is related to class location under the Federal standards, there would be no change in allowable operating pressure. We trust this satisfactorily responds to your inquiry. Sincerely, Original signed by: Joseph C. Caldwell Director Office of Pipeline Safety#

Page 2Richard T. Logan 123 South Commerce Street Natchez, Mississippi 39120 October 10, 1974 Mr. Ceasar DeLeon Office of Pipe Line Safety 400 7th Street Southwest Washington, D. C. 20590 RE: Texas Eastern Transmission Pipe Line Crossing SAP 79 (20), Wilkinson County, Mississippi Please find enclosed a set of plans on State Aid Project Number SAP 79 (20), showing Texas Eastern Transmission's pipe line crossing. Please note, on page 4 at approximate Station 59 + 52, that the pipe line is presently 6 feet in the ground. We propose to build a road over said ground and will be 4 feet above the present route, leaving a total fill depth of 10 feet. This will be a paved rural county road, which qualifies in the State Aid program. The traffic count is only 100 ADT. We are not going to move, relocate or disturb the present pipe line. Under these conditions as stated above, will the present pipe line need: (1) encasement, or (2) change class location, or (3) change operating pressure. Please advise me at your earliest convenience, in order that we may proceed with this project. Very truly yours, Richard T. Logan, County Engineer Wilkinson County, Mississippi#