Title
159th Street Watermain - Engineering Design Services
History
The Illinois Department of Transportation (IDOT) is moving forward with the Phase II Engineering for the widening of 159th Street from Ravinia Avenue to I-355. H.W. Lochner of Chicago, Illinois, is providing the engineering services to IDOT for the segment within the Village of Orland Park from Ravinia Avenue to Will/Cook Road. Village staff has identified a significant gap in the watermain infrastructure extending from Ravinia Avenue for approximately 4,000 feet to the west side of the railroad tracks. This proposed segment of transmission main will connect existing 16” watermain between 108th Avenue and LaGrange Road. IDOT has agreed to include construction of this main as part of the overall roadway construction project.
Ground conditions in the area have been identified as very poor. The north side of 159th Street contains Lake Sedgwick. Marley Creek crosses the road at 104th Avenue and there are significant wetlands on the south side of the street. Due to the extremely poor soil conditions, Lochner Engineering has tentatively proposed the extensive use of pylon supported roadway. This methodology uses numerous wood poles to support the sub-base and roadway above. A similar system will also be required to support the watermain.
To facilitate the incorporation of the watermain into the IDOT plans and take advantage of existing soil condition investigation and engineering, Lochner Engineering was asked to provide a proposal for the design engineering of the watermain. Their proposal which includes coordination, supplemental geotechnical investigation, design, plans, permitting and project administration totals $117,018.29. Due to the complexity of the watermain design and construction through unsuitable ground conditions, a contingency in the amount of $22,981.71 is recommended for a total engineering and project administration cost of $140,000.00.
On September 16, 2013, this item was reviewed by the Public Works and Engineering Committee, recommended for approval and referred to the Village Board of Trustees for consideration.
Financial Impact
Sufficient funds are available in the Underground Water & Sewer Lines Account #031-6002-470500.
Recommended Action/Motion
I move to approve accepting the proposal from H.W. Lochner of Chicago, Illinois, for design engineering of the 159th Street watermain for a total amount not to exceed $140,000.00 ($117,018.29 plus $22,981.71 contingency).