Explanation
BACKGROUND: This Ordinance authorizes the Director of Public Utilities to modify and increase the professional engineering services contract with Malcolm Pirnie, Inc. for the Dublin Road Water Plant Raw Water Intake Improvements Project, Division of Power and Water Contract No. 1052.
This modification will provide for additional engineering and professional services including Construction Administration/Construction Inspection services that were beyond the scope of the original contract including: the rehabilitation of the south abutment of the low-head dam, dewatering issues encountered during construction, low-head dam repairs and the leaf chute extension, amongst other miscellaneous items contained within the attached modification request letter submitted by Malcolm Pirnie. These changes were not originally anticipated or included in the original project scope but were implemented after site conditions were fully assessed and dewatered.
1. Amount of additional funds to be expended: $178,200.00
Original Contract Amount: $564,182.00
Amount of Modification #1: $436,982.00
Amount of Modification #2: $178,200.00
Amount of original contract and two modifications: $1,179,364.00
This requested modification is an 18% increase in the original contract and includes 10% contingency of $16,200.00.
2. Reasons additional goods/services could not be foreseen:
The South abutment of the low-head dam deteriorated beyond the original scope of repairs due to the unseasonably wet June '08. These high flows and the force of the river significantly damaged the South abutment requiring additional design efforts. Due to evaluations by the DPU Regulatory Compliance section, modifications to the leaf chute design were mandated. Additional efforts were required on the low-head dam since the true extent of the repairs could not be fully evaluated until the cofferdam was in place and the site adequately dewate...
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