Memorandum

City of Lawrence

Public Works Department

TO:	David Cronin, P.E., City Engineer
CC:	Chuck Soules, P.E., Public Works Director Mark Thiel, Assistant Public Works Director
FROM:	Zach Baker, P.E., Project Engineer
DATE:	July 9, 2015
RE:	Change Order for PW1316 Bob Billings and George Williams Geometric and Traffic Signal Improvements

Bob Billings Parkway and George Williams Way – Geometric and Traffic Signal Improvements

During the March 24, 2015 city commission meeting, commissioners approved the bid for the geometric and traffic signal improvements for the Bob Billings Parkway and George Williams Way intersection. The scope of the intersection project included installation of a traffic signal and the addition of dedicated left turn lanes at the intersection for eastbound and westbound Bob Billings Parkway; bicycle lanes would remain on Bob Billings Parkway.  Plans also included widening of existing Bob Billings to the west to tie-into the KDOT interchange project, and would accommodate a center turn lane on Bob Billings Parkway to promote safer turning movements for the existing Legend Trail Drive in addition to any future access points (see attached projects map).

Change Order Request

Additional milling and paving of Bob Billings Parkway is being proposed to bridge the gap between this Bob Billings Parkway and George Williams Way project and the Corpus Christi Turn Lane project currently being constructed. The proposal includes milling and overlaying the approximate 640 feet of pavement that bridges the two projects. This area could then be restriped to continue to have five (5) foot bike lanes as well as five (5) 10' lanes (two eastbound lanes, two westbound lanes, and a center left turn lane).  The approximate $80,000 cost would be a lower cost temporary solution to provide a center turn lane for Redleaf Place and Goldleaf Place on the north side of Bob Billings Parkway.  This safety improvement is one of many improvements being looked at with the Bob Billings Safety Group along the corridor in conjunction with the completion of the KDOT K-10/BBP interchange. The long term higher cost project to widen the street for a center turn lane and 11' lanes would be approximately $300,000.   In addition, the current roadway surface is in need of resurfacing.  The open cut patch from the Spring 2015 waterline reconstruction project has left a very rough surface for the bike lane.  Repaving and restriping this area would make sense to be done now with the economies of the adjacent two project.

Staff proposes to add the additional milling and paving as a change order to the Bob Billings Parkway & George Williams Way project. The $80,000 change order would be funded from infrastructure sales tax and would not cause additional delays to the project schedule, to be completed by August 7, weather permitting.

Action

Approve Change Order to R. D. Johnson for additional milling and paving on project PW1316, Bob Billings Parkway & George Williams Way Geometric and Traffic Signal Improvements in the amount of $80,000.