Title
Emergency Sanitary Sewer Line Repairs - Payment
History
On October 17, 2016, staff responded to a call regarding a sanitary main that had been damaged by a contractor working on the LaGrange Road Project at 156th Street. The sanitary main services businesses along the south end of LaGrange road from 156th Street to 159th Street. The contractor, while drilling the foundation for a new traffic signal pole on the southwest corner, punctured the 12” sanitary sewer main located 18 feet below ground. Airy’s, Inc. of Tinley Park, Illinois was contacted to evaluate and complete the emergency repair. Due to the depth, the repair was made using the cured-in-place pipe (CIPP) method. The repair is a trenchless rehabilitation method that inserts a liner within the pipe. Hot water, UV light, or steam is used to cure the resin in the liner to form a tight-fitting, jointless and corrosion-resistant replacement pipe. The total cost of this emergency repair was $5,670.00. A contract is in place between the Village and Airy’s, Inc. to perform this type of emergency work.
Correspondingly, the same contractor working on another traffic signal foundation at the northwest corner of 153rd Street and LaGrange Road also punctured a sanitary service line branching from a separate sanitary main. Airy’s was able to make this emergency repair at a cost of $2,398.49.
On October 18, 2016, the contractor returned to the work site to pour the concrete foundation for the installation of the traffic signal pole. The concrete pour was performed at the location of the recently repaired CIPP sanitary sewer section. The concrete traffic signal foundation extends 21 feet below the road surface. Based on the damage already incurred, the contractor installed a steel “casing” to contain the concrete and prevent the surrounding ground from collapsing into the hole. The contractor failed to ensure the casing adequately protected the newly made pipe repair. The sheer weight of the concrete pushed in the liner at the point of the repair. Because of this sanitary sewer breach, the concrete was being pumped into the sanitary sewer main. The contractor became concerned when an entire truck-load of concrete (8 yards) had not substantially filled the traffic signal foundation. The contractor contacted the Village. Upon arrival, staff confirmed that the concrete being pumped into the traffic signal foundation had actually filled the sanitary sewer main. Staff needed to respond rapidly to this emergency before the concrete hardened. Allowing the concrete to harden would then require excavating and replacing this sewer line 18 feet below the surface at a significantly higher expense. Airy’s, Inc. was immediately called to assist Village staff with the jetting and vacuuming of the sewer line. The total cost of this emergency work was $15,770.95. The Village will seek reimbursement for these costs including staff time and contractor work. Staff is also working with IDOT and the contractor to ensure the sanitary main is adequately protected during the subsequent installation of the traffic signal foundation.
After the sanitary sewer was jetted and cleaned, the entire line was televised and inspected. The televising showed that the timely response proved valuable in that the line was clear and free of concrete. The televising also showed that the previous CIPP liner repair had been compromised by the concrete pour. The televising also revealed that the sanitary pipe had “joint separations” and longitudinal pipe cracking unrelated to the previous damage. Considerable ground water infiltration was observed at the joint separation.
With the identification of the joint separations (infiltration), pipe cracks and the need to perform a second repair to the compromised CIPP pipe section, staff determined that it would be cost effective and in the Village’s long-term interest to line the entire section (355 linear feet) of sanitary sewer pipe to correct all issues.
Staff solicited and received proposals from three vendors; Airy’s, Inc. of Tinley Park, IL., J.C. Dillon, Inc. of Peoria, IL., and Insituform Technologies, LLC of Orland Park, IL. Cost proposals submitted to line the 355 linear feet section of 12” sanitary sewer main are as follows: Airy’s - $17,680; J.C. Dillon - $19,150; Insituform - $27,025. This work is budgeted as part of our ongoing Inflow and Infiltration Reduction Program.
Because of the critical function of this sanitary sewer line (servicing businesses along LaGrange Road), the work was completed on an emergency basis on October 25, 2016 using the low proposal from Airy’s Inc. of Tinley Park, Illinois.
On November 7, 2016, this item was reviewed by the Public Works Committee and recommended for approval and referred to the Village Board of Trustees for consideration.
Financial Impact
Sufficient funds are available for the sanitary main slip lining in Underground Water & Sewer Lines account 031-6003-470500. Contingency funds are available in Contingency account 031-6001-484950 and will be transferred to Underground Water Lines Valves account 031-6003-443800.
Recommended Action/Motion
I move to approve transferring funds from Contingency to Underground Water Lines/Valves in the amount of $23,839.44;
And
Approve payment to Airy’s, Inc. of Tinley Park, Illinois, for Emergency Sanitary Sewer Line Repairs in an amount not to exceed $41,519.44.