HomeMy WebLinkAbout6.f. Change Order #3 - 2004 SCADA System, City roject #377AGENDA ITEM: Change Order #3 -2004 SCADA System,
City Project #377
AGENDA SECTION:
Consent
PREPARED BY: Andrew J Brotzler, P.E., City Engineer
AGEI4 O 5
ATTACHMENTS: Letter and Change Order #3
APPROVED BY�
#3 for the 2004 SCADA
RECOMMENDED ACTION: Motion to Approve Change Order
System, City Project #377, and Authorize the Necessary Signatures.
4ROSEMOLINT
SUMMARY:
CITY COUNCIL
City Council Meeting: August 1, 2005
EXECUTIVE SUMMARY
ISSUE:
Consider approval of Change Order #3 for the 2004 SCADA System, City Project #377.
BACKGROUND:
With the recent activation of the newly installed SCADA system, the system has been experiencing communication
failures As detailed in the attached memorandum from Paul Kaeding, the source of the communication failures has
been determined to be interference with the radio frequency that has been designated by representative companies
of the FCC. The contractor is working to have a new radio frequency assigned to the City's SCADA system As a
result of this additional work, an extension of the contract completion date is warranted
The attached change order modifies the contract completion date from September 30, 2005 to November 11, 2005
There is no change in contract price as part of this change order
Staff is requesting Council approval of Change Order #3 for the 2004 SCADA System, City Project #377
G \ENGPROJ \377 \ChangeOrder3CC10 -18 -05 doc
KAEDING AND ASSOCIATES, 1NC.
7300 France Avenue South
Suite 330
Minneapolis, Minnesota 55435 -4545
Phone. (952) 831 0317
MEMORANDUM
TO: City ofR.,emount
Attn: Mr. drew Br i er
FROM: Paul Kaedi
DATE: September 21, 2005
RE: City of Rosemount, Minnesota
SCADA System
E -Mail: into @kaeding tom Fax' (952) 831 -2179
Since the radio communication portion of the SCADA system was placed in service, there have been
infrequent `communication failure" events. Initially, the conclusion was that the problem was a "software"
glitch that caused a momentary interruption of communication to the various stations. The failures appear
to occur during the early morning hours, but obtaining detailed information is difficult since the failures are
infrequent.
In the last several weeks US Filter has addressed the problem since the problem has recently been more
frequent. Again, the analysis has been difficult due to the time the interruptions occur and the fact that it
occurs infrequently.
US Filter has switched several radios and has undertaken other steps, and it appears that equipment and
software systems are not the underlying issue. A search of frequencies indicates the same frequency was
assigned to a user in close proximity to the City, and to another user who generates a strong signal from the
northern suburbs We have worked with US Filter by scanning the frequency assigned to the City and
adjacent frequencies, and have noted signals that would potentially interfere with the Rosemount signal
The conclusion based on the information available at this time is that there is interference on the frequency
assigned to the City, and that the problem cannot be easily solved by trying to work with the interfering
parties. The frequencies are assigned by companies that are designated by the FCC. The resolution is for
US Filter to contact the FCC designated company and obtain a new frequency The radios will have to be
reprogrammed for the new frequency We are hoping that the company that assigns frequencies will be able
to do so in a short period of time, but the process can take up to four weeks. As a result, an extension in the
contract period of about six weeks is requested and recommended.
We trust this meets with your approval. If you have questions, please contact me.
PFK m]
Date of Issuance:
Owner City of Rosemount, MN
Project ROSEMOUNT SCADA SYSTEM
Contract Rosemount MN SCADA System
Contractor US Filter Control Systems, Inc.
The Contract Documents are modified as follows upon execution of this Change Order
Description
Extension of contract time to allow for new frequency request
and radio modifications
Attachments (List documents supporting change)
Memorandum dated September 21, 2005 to City of Rosemount.
Origi •1 Contract Pnce
CHANGE IN CONTRACT PRICE:
Increase from p viously approved Change 0 ers
Na 1 t• 0 2
Contract Price pnor to this C n- Order.
Increase of this Cha ee Order
Contract rice incorporating this Change Order
REC MM£NDED•
By
Date
Ka
d Associates, Inc.
Approved by Funding Agency Of applicable)
September 21, 2005
ACCEPTED:
Effective Date•
EJCDC No. C -941 (2002 Edition)
Prepared by the Engineers' Joint Contract Documents Committee and endorsed by the
Associated General Contractors of America and the Construction Specifications Institute,
Change Order
No. 3
Owners Contract No
September 21, 2005
Date of Contract 12/10/2004
Engineers Project No 02403
To November 11, 2005
CHANGE IN CONTRACT TIMES:
Original Contract Working days Calendar days
Substantial completion (days or date)' May 27, 2005
Ready for final payment (days or date)• June 17. 2005
Increase from previously approved Change Orders
No 1 to No 2
Substantial completion (days)
Ready for final payment (days)• September 30, 2005
Contract Times pnor to this Change Order
Substantial completion (days or date)•
Ready for final payment (days or date): September 30, 2005
Increase of this Change Order
Substantial completion (days or date):
Ready for final payment (days or date). November 11, 2005
Contract Times with all approved Change Orders:
Substantial completion (days or date)
Ready for final payment (days or date) November 11, 2005
ACCEPTED:
By By
City of Rosemount S Filter Control Systems, Inc.
Date Date ,74):7 /05—
Date
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