Explanation
1. BACKGROUND: This legislation authorizes the Director of Public Utilities to modify (Mod #1) an existing professional engineering agreement with Arcadis US, Inc. for the Second Barrel Interconnector Augmentation Project, CIP 650860-116300. This project is to perform detailed design of approximately 2,300 ft. and 8.5’ diameter of sanitary sewer, an 8’ by 8’ sluice gate and engineering services during construction. This project is in the preliminary design stage. This contract modification is to evaluate options for replacement or permanent removal of the two influent sluice gates within the Interconnector Junction Chamber (IJC), concrete rehabilitation of IJC, and odor control of IJC.
The planning area 64 - Far South.
1.1 Amount of additional funds to be expended: $243,553.80
Cost summary:
Original Contract $ 416,261.07
Modification 1 $ 243,553.80
Current Total $ 704,814.87
1.2 Reasons additional goods/services could not be foreseen:
The original contract did not include a structure evaluation and rehabilitation of the Interconnector Junction Chamber (IJC) and the three gates within IJC where the new pipe ties in. It was discovered during the preliminary design phase that those gates needed to be either repaired or replaced, and IJC structure needs to be evaluated to ensure its structural integrity.
1.3 Reasons other procurement processes are not used:
The work to be performed is an expansion to the project and integral part of the project. The new pipe ties in at IJC, and it is crucial to ensure its structural integrity and long term operation. It is more cost effective to have the existing consultant complete the expanded service rather than bid it out.
1.4 How cost of modification was determined:
The cost was estimated by the consultant and negotiated by SSES Project...
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