Explanation
BACKGROUND: This Ordinance authorizes the Director of Public Utilities to modify and increase the construction contract with Shook Heavy & Environmental Group, for the Dublin Road Water Plant Disinfection and Miscellaneous Improvements Project, for the Division of Power and Water.
The work to be performed in this modification includes:
· Additional concrete crack repair work is necessary to complete the repairs in the 1907/1922 Clearwell. This includes: ceiling, walls, and floor crack repairs. - $183,522.25
· Three (3) critical butterfly valves installed in 1967 need emergency repairs. These valves ceased operation during the project and need operator upgrades. - $300,000.00
· Flocculation channel wall repair is required to prevent the shared deteriorated wall from failing and impacting an active flocculation channel, thus affecting plant water treatment capabilities. - $196,764.00
· Concrete slab removal and replacement of the north deck of the sedimentation basins and re-routing of electrical conduits in the existing slab. - $191,695.00
· 10% contingency - $87,198.13
1. Amount of additional funds to be expended: $959,179.38
Original Contract Amount: $13,026,273.12
Amount of original contract and this modification: $13,985,452.50
2. Reasons additional goods/services could not be foreseen:
· The clearwell was constructed in 1907 and an additional section added in 1922. This clearwell could not be taken out of service prior to repairs being performed. The true extent of these repairs was not fully identified until the clearwell was dewatered and inspected.
· Three critical valves initially installed in 1967 were closed to isolate the 1907/1922 clearwell. These valves ceased operation during the project and require operator upgrades. These valves are critical to the success of treating water at the Dublin Road Water Plant.
· The wall repair is mandatory to keep the plant active during this stretch of construction ...
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