26 April 2017 Mr. Daniel P. Farley Chief, Traffic Operations Deployment and Maintenance Section Pennsylvania Department of Transportation Bureau of Maintenance and Operations 400 North Street Harrisburg, PA 17120 Re: ECMS Agreement E03115 Work Order 17 – ITS and Traffic Signal Technical Support Services Review of Valmont Industries’ Updated Standard Design Drawings (Revision I) Dear Mr. Farley:

Michael Baker has completed our review of Valmont’s shop drawings, Revision I, for standard traffic

signal support structures including mast arms, strain poles and pedestal poles. Valmont has requested

the following revisions to their currently approved shop drawings dated 25-Janurary-2014 (Revision G):

Updated luminaire arm details to cover up to 25’ length arms

Added upper hand hole detail behind mast arm

Added dampener detail, sign blank with mounting bracket

Revised pole and mast arm schedule 51’-60’ arm details to 51’-55’ and 56’-60’

Added notes and details regarding UT testing for inspection

Michael Baker finds that the shop drawings conform to the following requirements:

PennDOT Publication 148 - Traffic Standards – Signals, dated December, 2011

PennDOT Publication 149 - Traffic Signal Design Handbook, dated May, 2013

PennDOT Publication 408/2011 - Highway Specifications, dated October, 2015

Accordingly, we recommend listing Valmont as an approved fabricator in Section 1104.02(a) of PennDOT

Publication 35 - Approved Construction Materials (Bulletin 15) for the mast arms, strain poles, and

pedestal poles in the attached shop drawings.

If you have any questions or require additional information, please contact me at 717-221-2058.

Sincerely,

MICHAEL BAKER INTERNATIONAL, INC.

Todd Trautz, P.E., PTOE Traffic Division Manager