HomeMy WebLinkAbout11-15-2016 Item 09 Water Supervisory Control and Data Acquisition System Upgrade Meeting Date: 11/15/2016
FROM: Carrie Mattingly, Utilities Director
Prepared By: Aaron Floyd, Utilities Deputy Director-Water
Miguel Barcenas, Utilities Engineer
SUBJECT: WATER SUPERVISORY CONTROL AND DATA ACQUISITION SYSTEM
UPGRADE, SPECIFICATION NO. 91062
RECOMMENDATIONS
1. Approve plans and specifications for the Water Supervisory Control and Data Acquisition
(SCADA) System Upgrade, Specification No. 91062 and authorize staff to advertise for bids;
and
2. Authorize the City Manager to award the contract to the lowest responsibl e bidder in an
amount not to exceed $1,225,500.
DISCUSSION
Background
Supervisory Control and Data Acquisition (SCADA) systems include elements of computer
programing, radio communication networks, complex databases, and human-machine interface
(HMI) stations. With SCADA, an operator can efficiently manage a complex network of pipes,
valves, tanks, and pump stations from an HMI station based on real-time data collected from
remote locations of the water system. The data collected by SCADA includes flow rates,
pressures, and tank levels that give an operator the ability to make informed decisions during
operational transitions, emergency conditions, or scheduled shutdowns needed for maintenance,
which will result in better control of water quality, and an improved level of service.
In June of 2009, Council approved a capital project to upgrade the SCADA systems for Whale
Rock Reservoir and the Water Distribution System. Significant efforts by staff from various
departments collaborated with the design consultant to complete the feasibility studies needed for
radio communications, preliminary design, and completion of bidding documents. The
construction efforts completed to date at Whale Rock Reservoir and South Hills were needed to
prepare for the recommended solicitation process.
The project has been broken into two components. The special provisions (Attachment B)
contain 1) a bid list and 2) alternate bid sites. The bid list includes the minimum improvements
required to make the project operational. The inclusion of the alternate bid sites provides for
complete SCADA coverage of the water distribution system. While the Engineer’s Estimate
includes both the bid list and alternate bid sites, current construction volatility and constrained
project funding resulted in using this approach for project bidding. Therefore, the project will be
awarded to the lowest responsive and responsible bid received for the base bid list.
9
Packet Pg. 223
ENVIRONMENTAL REVIEW
This project is categorically exempt from the California Environmental Quality Act pursuant to
CEQA Guidelines section 15302 (Replacement or Reconstruction of existing structures and
facilities).
CONCURRENCES
The Public Works Department has reviewed the plans and special provisions, and provided
comments that have been incorporated; Community Development concurs with the
environmental findings.
FISCAL IMPACT
The Water SCADA System Upgrade project was approved in the 2009-11 Financial Plan (page 3
Plan) in the amount of $1,850,000. Total project expenditures to-date are $54,000, with
$1,796,000 remaining.
The total project cost is estimated at $1,790,000.
Whale Rock Fund Water Distribution Total Project
Upgrades to South Hills Radio Tower
Construction 1 :
$185,000
$1,040,500
54,000
$1,225,500
Construction Contingencies: $37,000 $120,000 $157,000
Construction Management : $18,500 $103,000 $121,500
Miscellaneous Costs : $30,000 $262,000 $292,000
Total Project Costs $1,850,000
1 Engineer’s Estimate for construction.
ALTERNATIVES
Deny or defer approval to advertise. The City Council may choose to deny or defer the approval
to advertise this project. If Council elects to defer the project, Utilities would continue working to
maintain the water infrastructure under current operating conditions. Efforts already made to
prolong the life of the available SCADA includes repairs to radio networks in 2015, and updates
in 2016 to control logics at storage tanks. If the current stations with a SCADA system fail
requiring emergency replacement, emergency construction costs and impacts to the water
infrastructure would be significant.
Attachments:
a - Council Reading File-Water SCADA System Upgrade Plans
b - Council Reading File-Water SCADA System Upgrade Provisions and Specs
9
Packet Pg. 224