Background/Discussion
This agreement is in reference to Segment 4 of the Iowa DOT’s Council Bluffs Interstate System Improvements, including the following project numbers:
IM-029-3(190)53--13-78; IM-029-3(218)53--13-78; IM-029-3(219)53--13-78;
IM-029-3(220)53--13-78; IM-029-3(70)53--13-78; IM-029-3(71)54--13-78;
IM-029-3(73)54--13-78; IM-029-3(74)54--13-78; IM-029-3(192)54--13-78;
IM-029-3(193)54--13-78; IM-029-3(221)54--13-78; IM-029-3(222)54--13-78;
IM-480-1(166)0--13-78; and IM-480-1(167)0--13-78.
The agreement includes items related to traffic signals, lighting, fencing, signing, maintenance of right-of-way, designated haul routes, traffic detours, and construction of the I-29/I-480/West Broadway Interchange and Frontage Roads. The project will begin just north of the newly constructed UPRR bridge over I-29 and end east of N. 35th Street along I-29. The project includes reconstruction of 9th Avenue from just east and west of the ramp terminals, construction of new northbound and southbound frontage roads, and reconstruction of West Broadway from just west of 36th Street to the Missouri River Bridge. The new I-29/I-480 interchange will provide access to West Broadway. The project entails grading, paving, bridges, storm sewer, sanitary sewer, lighting, and traffic signals.
The City has existing sanitary sewers that cross the interstate at 6th Avenue and Avenue D. These sanitary sewers were originally constructed with the interstate in the 1960’s and are in need of replacement. They will be replaced as part of this project. The City will be responsible to reimburse the DOT for this cost. The cost is estimated to be $687,640. A request for payment will be sent by the DOT after completion of the work. A project was included in the FY17 CIP to account for this expense, FY17-15.
The DOT has agreed to construct modifications to an existing levee outfall structure as part of the improvements to I-29 and I-480. The City will be responsible to reimburse the DOT for this cost. The cost is estimated to be $262,525. The costs will be included with the Levee Certification Program funding.