Broken Arrow Municipal Authority
Meeting of: 04-16-19
Title:
title
Approval of and authorization to execute Change Order #3 for Construction Contract with Prime Controls (155425) for Citywide Supervisory Control and Data Acquisition (SCADA) Systems
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Background:
The BAMA received Oklahoma Eater Resources Board Loan (OWRB) No. FAP-16-0001-L for implementation for a Supervisory Control and Data Acquisition (SCADA) system in 2016. Alan Plumber and Associates, LP was selected to design a system for monitoring and control of 29 wastewater lift stations and 3 water booster station, and improvements to the plant control systems at Lynn Lane Wastewater Treatments Plant. The design was complete in October 2017, and the project was advertised for bids on October 24 and 31, 2017. The contract was awarded to the lowest responsible bid of $1,559,028.00 for the base bid and alternative no. 1 to Prime Controls, LP. OWRB approved the contract award on December 7, 2017. Notice to Proceed for the project was issued February 8, 2018.
This Change Order #3 addresses the following additions to the contract:
CO3-1 - Due to field conditions conflicting with design drawings, the PLC controls rack installed at Pump Station #3 (Greenbriar) is required to be relocated. The attached breakdown supplied by Prime Controls relates to the remove and relocation costs required to adjust the location of the PLC control rack within the pump station. The below costs are a complete in place cost to perform the work.
CO3-2 - During construction it was noted that drawing #42 concerning the WAS Pump Station 9-P-1 & 9-P-2 for Sludge Thickener #1 & #2, calls 1-1PR #16TSP, where-as the devices actually requires an 8C/#14 to each of the Sludge Thickeners. The contractor is to install as required by manufacturer recommendations. The below costs are a complete in place price to install the additional cable, and added labor for conditions resulting from pulling a larger cable.
- Also during construction, it was noted that an additional Cradlepoint BD1-4250-00N Essentials modem and associated network device mounting kit was required and was not noted in the plans. The below costs are for the contractor to provide the required materials to COBA IT department for further installation.
CO3-3 - During construction of the underground wiring component of the LLWWTP SCADA portion, it was found that the existing conduit noted on sheet #38, drawing #400 had collapsed prior to construction and cannot receive the required cabling. The contractor is to trench and install a new 2" PVC in concrete duct bank per the contract drawing details. The below costs summarize a complete in place product for the above noted work.
Total Number of Days Added by this Change Order:
- Due to the changes in CO3-1, CO3-2, CO3-3 created impacts to critical path items results in an additional 20 calendar days added to the contract.
The additional cost associated with these changes is as follows:
Previous Change Orders: $33,600.53
This Change Order: $24,684.15
Total Cost of Change Orders: $58,284.68
Original Contract Amount: $1,559,028.00
Revised Contract Amount: $1,617,312.68
Percent Change in Contract: 3.74%
Applicable to Comp. Bid Act: 3.74%
Cost: $24,684.15
Funding Source: OWRB FAP Loan - FAP-16-0001-L
Requested By: Alex Mills, P.E., Engineering and Construction Director
Approved By: Michael L. Spurgeon, City Manager
Attachments: 155425 Contract Change Order CO3
Recommendation:
recommend
Approve and execute Change Order #3 for the construction contract with Prime Controls.
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