Title
143rd Street and Crystal Tree Drive Emergency Water Main Repair - Proposal
History
On November 6, 2016, Public Works staff received a call reporting a possible water main break on the southwest corner of 143rd Street and Crystal Tree Drive, at the entrance to the Crystal Tree Subdivision. During staff’s investigation, the water was valved down to minimize loss, maintain integrity to the system and provide minimum service to the only impacted structure; the gate house containing a bathroom and sink.
On Monday and Tuesday, November 7 and 8, staff continued working to identify the exact location of the 12” main and the break itself. Utilizing the hydro-excavating process, the water main was located nine feet deep, and found to run under the large brick entryway monument and immediately behind the wrought iron fence and brick piers. The water rising to the surface was more than eight feet from the actual main. Using leak detection services, the leak was determined to be immediately behind the brick monument and under large spruce trees.
Staff met with representatives from the Crystal Tree Homeowners Association (HOA) to discuss the situation and impacts to their landscaping. Staff worked with Airy’s, Inc. of Tinley Park, Illinois to formulate an action plan to make the repair. The plan involved the installation of a valve and fire hydrant by Public Works staff on Wednesday, November 9. Staff installed valve allowed for the isolation of the break, re-established full water service to the gate house, and allowed time to vet the options for final repair. A fire hydrant was also installed by staff to facilitate future flushing. To assist staff in gaining access to the work area, the large tree was removed by the Crystal Tree HOA. The water main was isolated and turned off in preparation for the emergency repair work that is tentatively scheduled for the week of November 28, 2016.
Staff evaluated several options to repair the water main. Option one was...
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