Title
Ravinia Avenue North Extension Utility Investigation - Proposal
History
As part of the Ravinia Avenue Extension north of 143rd Street, rerouting of an existing 42” storm sewer is required. This storm sewer is currently located behind the existing Randy’s Market and will be rerouted down the middle of Ravinia Avenue as it is extended north of 143rd Street to Crescent. Several options were considered in the initial analysis to avoid work that would severely impact 143rd Street traffic or destroy recently reconstructed pavement. Using past success as a guide, staff consulted with Airy’s, Inc. of Tinley Park, Illinois. After reviewing options, consensus was that boring beneath the new pavement significantly reduced impact to 143rd Street traffic and the need for extensive restoration of freshly installed pavement and brick crosswalks. The chosen course of action will auger beneath 143rd Street installing a steel casing and new stormwater pipe. Once installed, the new pipe will be connected to the existing structure from inside the new pipe avoiding the traditional excavation pit at the point of new connection.
To evaluate the viability of this method and provide detailed information regarding known utilities for final engineering, hydro-excavating to visually locate existing utilities was required. On December 8, 2011, Airy’s, Inc. provided a proposal and was contracted to perform the hydro-excavating work for a cost of $4,077. As required, JULIE locates were requested and three specific hydro-excavation locations were identified. The Nicor gas main and AT&T duct package were found without problem. ComEd mismarked their conduit but was eventually found significantly deeper than expected. Comcast could not be located as marked even though they were asked and confirmed their location several times.
Utilizing their own staff and locating equipment, Airy’s identified a possible alternate location for the Comcast conduit requiring a fourth pavement core and hydro-excavate. This additional work was not anticipated in Airy’s December 8, 2011, proposal. Because of the extreme depth and mislocating of ComEd and difficulty in determining a probable location for Comcast, a revised proposal was requested adding the fourth pavement coring and hydro-excavate. On January 12, 2012, Airy’s submitted a revised proposal totaling $7,277. To prevent delays in finalizing engineering for the relocation of the storm sewer (time sensitive for the 9750 Project), staff provided Airy’s, Inc. authorization to complete the work outlined in their January 12, 2012, revised proposal.
On January 18, 2012, Airy’s performed the additional hydro-excavation, successfully locating the Comcast cable at the secondary location.
The Public Works and Engineering Committee was briefed on this item during their January 16, 2012, meeting noting the likelihood that Board approval for the revised Airy’s proposal would be requested at the February 6, 2012, Board meeting.
Financial Impact
There are sufficient funds Account 282-0000- 499.71-25 (Capital Infrastructure) to cover the cost of this work.
Recommended Action/Motion
I move to approve accepting and authorizing the Village Manager to finalize and execute the proposal dated January 12, 2012, from Airy’s, Inc. of Tinley Park, Illinois, for utility investigation/hydro-excavating work required for the installation of a new 42” storm sewer beneath 143rd Street as part of the construction of Ravinia Avenue north of 143rd Street for an amount not to exceed $7,277;
And
Approve authorizing payment to Airy’s Inc. of Tinley Park, Illinois, in an amount not to exceed of $7,277.