1j-2.P&S for SCADA ImprovementsMEMORANDUM
TO:
Todd Gerhardt, City Manager
CITY OF
77C0 Market Boulevard
PO B~;x !47
O'ar/asser~ MN
FROM:
DATE:
SUB J:
Paul Oehme, City Engineer/Public Works Director_/?,
April 19, 2004 ~'
Consider Authorization of Preparation of Plans & Specifications fol' SCADA
System Improvements, Phase II - PW307D
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REQUEST (Simple Majority Vote Required)
The City Council is requested to consider authorization of preparation of plans and
specifications for SCADA System Improvements, Phase II.
DISCUSSION
The Engineering Department has been evaluating the City's Supervisory Control and Data
Acquisition (SCADA) system because of current problems with the system and evaluating
future needs. SCADA systems are designed to automate the management of the wells,
towers, lift stations, pumps, and any other items in the water distribution and sanitary sewer
system. The system uses telemetry units to relay information back to a main computer
system which checks if the system is functioning properly.
As discussed at the April 12, 2004 Council worksession, the City's current SCADA system is
antiquated, cannot be expanded upon, and routinely gives false alarms. The cun-ent system is
very expensive to maintain and requires a substantial amount of staff time to check false
alarms and keep the system operational. Staff feels the existing SCADA system should be
replaced at this time.
Well No. 9 bids include the new SCADA upgrades. The bid also includes the SCADA
upgrades at Well No. 3 because water from Well No. 9 will be treated at Wellhouse No. 3.
The second phase of this project will replace the rest of the City SCADA system. This
includes all remaining wells, water towers, and sanitary lift stations. If the second phase of
the project is advanced on the time table envisioned, the second phase of the SCADA
upgrades installation should coincide shortly after Well No. 9 is brought into service. The
bids for the second phase of the project will consider awarding the contract on a time and
materials basis.
The total construction cost estimate for the SCADA system, Phase II, is $730,000. The scope
and cost of this project may be adjusted after site review and documentation of the existing
system. Funding for this project is proposed 100% from the sewer and water utility fund.
RECOMMENDATION
Staff recommends that the City Council adopt the following motion:
"The Chanhassen City Council authorizes preparation of plans and specifications for SCADA
System hnprovements, Phase II."
c: Sheldon Sorensen, Kaeding & Associates, Inc.
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