Title
Consider and take action on a resolution authorizing Change Order No. 1 with ISJ Underground Utilities, LLC related to the East Main 24-inch Force Main Replacement Project (WW1801I) in an amount of $189,600 (Executive Director of Capital Projects)
Background:
Approval of this item will authorize Change Order No. 1 with ISJ Underground Utilities, LLC related to the East Main 24-inch Force Main Replacement Project (WW1801I) in an amount of $189,600.
On September 10, 2024, City Council awarded the construction contract for the East Main 24-inch Force Main Replacement Project (WW1801I) to ISJ Underground Utilities, LLC. in the amount of $3,247,245.
To avoid a potential catastrophic failure of existing 24-inch force main along and under FM 2094 during the replacement project, wastewater operation opted to bypass the entire existing force main from Genco Canal to west of Coryell Street. To accomplish this, the existing steel pipe aerial crossing, which was to remain in place, was to be cut and connected to the emergency long distance bypass piping. During this retrofitting, excavation and field observations determined that the condition of the existing steel pipe crossing at the FM 2094 bridge over the Genco Canal was worse than anticipated (this segment has been repaired once before).
While this segment is newer than the original underground force main, it is over 12 years old and been exposed to corrosive environment inside which will make it more susceptible to future leaks at joints and failures. This condition raised major concerns for City’s wastewater operation staff over the long-term integrity of this existing aerial crossing relative to the design life of the new PVC force main being installed. To avoid a future failure over the Genco Canal, it was determined that best course of action is to replace the aerial crossing with new fully-restraint ductile iron pipe. This change order 1 includes the cost of new 24-inch ductile iron pipe, fittings, ...
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