On March 10, 2021, a PO was issued to Arcosa Traffic Structures with a 2-4 week lead time on shop drawings and 18-20 week lead time on structures upon approval.

On April 27, 2021 approvals were provided to Arcosa, production schedule pending verified field survey measurements

May 18, 2021 pricing was requested for increased upright lengths needed per our field measurements on structure A-OH02. Drawings needed revised. A revised purchase order was issued.

May 21, 2021 it was determined that the chord pipe size (4.5" x .375") called for in the plans was no longer available. An RFI (No. 2) was submitted to use 4" schedule 80 as an alternative.

May 21, 2021 RFI No. 2 alternative was rejected.

Arcosa searched for a viable alternative to the 4.5" x .375" pipe called for in the project plans.

June 23, 2021 RFI No. 2 was revised to ask for permission to use 4" schedule 120 as an alternative material for sign chords.

June 28, 2021 additional information was requested for the 4" schedule 120.

July1, 2021 official RFI response was provided to Arcosa requesting material properties for 4" schedule 120.

July 16, 2021 consent was provided to use 4" schedule 80 with material properties of 52 KSI A500 Grade C at .337" thickness. Revised drawings were requested from Arcosa.

July 19, 2021 structures were officially released to production.

July 22, 2021 ETA's were provided for the dates of 11/24/2021 & 12/06/2021 respectively.

On July 26, 2021 it was discovered that the upright pipe for the structures was no longer available. An alternative was submitted for approval.

On July 29, 2021 approvals were sent to Arcosa with release and use of alternative steel pipe material.

A 20 week lead time would put our ETA for structures at December 16, 2021. Arcosa currently estimates a completion of 11/24/2021 for A-OH02 & 12/06/2021 for A-OH03.