SR 124, East Jct. US 12 - Reconstruction

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Walla Walla County
This project realigned a curve on SR 124, which was posted with an advisory speed of 45 mph.  This section of SR 124 had a high potential for run-off-the-road accidents because SR 124 travels in virtually a straight line for 10 miles east of the curve and three miles west of the curve.  The rebuilt curve meets current design standards with wider lanes and shoulders, and the motorists can now travel at a consistent 60 mph thoughout the entire section.

Design:  Contract Administration:  Schedule:  Cost:  Engineer's estimate:  $161,118 Contractor's bid amount:  $142,400 Total dollars paid to contractor:  $145,589 The final contract amount was $3,182, or 2.24% over the original bid amount yet was still under the engineer's estimate by 9.64%.

Construction Summary
Construction of this project went very smoothly.  One of the challenges was keeping SR 124 open to traffic while the curve was being realigned.  The contractor used a pilot car to get alternating one-way traffic through the work area on a single lane.  At the end of the work day, they were required to leave the road in a passable condition for both directions of traffic.

Because adjacent farms were affected by the construction, both the contractor and WSDOT worked with the farmers so that they could do their work with minimal delays.

Our project team did an excellent job of resolving issues that arose.  One of the utilites did not get their power poles moved before the contractor started work.  The problem was resolved through coordination between the contractor and the utility company, which allowed them to work around each other.  This issue was quickly resolved and did not affect the schedule or cost of the project.

Our contractor had 20 working days to complete this project.  Substantial Completion was granted after only 16 working days.  The project team also worked very hard to provide a safe work area both for the contract personnel and the traveling public.

Contractor
Transtate Paving Company, Pasco, WA

WSDOT Contact
Moe Davari, P.E.
(509) 222-2402
Davarim@wsdot.wa.gov

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