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Date
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April 9, 2007
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Agenda
Item No. 8 Roll
Call No. 07- Communication No. 07-186 Submitted by: Jeb E. Brewer, P.E.
City Engineer and William G. Stowe, Assistant City Manager/Public Works/Engineering
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AGENDA
HEADING:
Approving and
authorizing the execution of Iowa Department of Transportation (IDOT) Change
Order No. 9 to Keo Way Phase 2 Storm Sewer Outlet not to exceed City cost of
$138,275.75.
SYNOPSIS:
Recommend
approval of Change Order No. 9 as prepared by IDOT in the amount not to exceed
$240,062.07, City share being $138,275.75, for the cost to remove and dispose
of rubble.
FISCAL
IMPACT:
Amount:
$138,275.75
Funding
Source: 2006-2007 CIP, Page Street-23, I-235 Storm
and Sanitary Sewer Improvements, STR197, Storm Water Utility Funds.
Amount:
$101,786.32
Funding
Source: Iowa Department of Transportation I-235
Project Funds.
ADDITIONAL
INFORMATION:
On May 22, 2006,
under Roll Call No. 06-977, the City Council approved a preconstruction
agreement with Iowa DOT for Keo Way (Birds Run) Phase 2 Storm Sewer related to
I-235, where the City will reimburse Iowa DOT an estimated 57% of the storm
sewer cost, 100% for any enhanced storm capacity, and 100% of sanitary sewer
cost. The repayment will begin in FY
2007-08. As part of this agreement,
change orders exceeding $25,000 in additional City contribution shall be
approved by the Des Moines City Council.
Change
Order No. 9 is for the additional cost to remove and dispose of the rubble that
was encountered during the construction of the storm and sanitary sewer. Over the past decades, Keo Way had
several layers of bricks constructed on top of one another for the road surface
that is underneath the present asphalt surface. Interlaced with the brick layers were trolley track and wooden
ties. When the trolley track and wooden
ties were removed, the wooden ties would pull from underneath sections of the
street that were not to be removed for the project. Flowable mortar was utilized to fill the void where the wooden
ties pulled from underneath the existing street surfacing. The construction also encountered old
concrete building foundations and abandoned concrete electrical duct
bank that was also removed as rubble.
The rubble material that was not suitable for backfill was hauled from
the project site for disposal. As
unsuitable rubble material is hauled from the project site, suitable material
is hauled to the project site to replace the unsuitable material. The change order has been reviewed by the
City’s representative, Veenstra & Kimm, Inc., and found to be
reasonable. The total change order is
$240,062.07, with the City’s share being $138,275.75.
PREVIOUS
COUNCIL ACTION(S):
Date:
December 4, 2006
Roll Call
Number: 06-2352
Action: Approving
Change Order No. 7 with Iowa Department of Transportation for Keo Way Phase 2
Storm Sewer Outlet, not to exceed City cost of $138,831.06. (Council
Communication No. 06-752) Moved by Vlassis to adopt. Motion Carried 6-0.
Date:
May 22, 2006
Roll Call
Number: 06-977
Action: Authorizing
execution of Iowa Department of Transportation Preconstruction Agreement for
Keo Way (Birds Run) Phase 2 Storm Sewer Outlet. (Council
Communication No. 06-294)
Moved by Vlassis to adopt.
Motion Carried 7-0.
Date:
August 31, 2000
Roll Call
Number: 00-3634
Action: Approving Iowa Department of Transportation
Predesign Agreement for Interstate 235, from the west City limits to the north
City limits. (Council
Communication No. 00-411). Moved by McPherson to adopt. Motion Carried 4-2-1. Nays: Brooks and Vlassis. Absent:
Flagg.
BOARD/COMMISSION
ACTION(S): NONE
ANTICIPATED
ACTIONS AND FUTURE COMMITMENTS: NONE