ITEM 3.10 West WWTF Digester Improvements6,5
Ot�ezoz
MINNESOTA V
DEPARTMENT INFORMATION
Request for
City Council Action
ORIGINATING DEPARTMENT:
REQUESTOR:
MEETING DATE:
Administration
Lori Johnson, City Administrator
June 13, 2016
PRESENTER(s):
REVIEWED BY:
ITEM #:
Consent
3.10
AGENDA ITEM DETAILS
RECOMMENDATION:
Recommend approval of an amendment to the scope of work of the AE2S contract for the West WWTF
Digester Improvement project to include design services for alternates.
ARE YOU SEEKING APPROVAL OF A CONTRACT?
IS A PUBLIC HEARING REQUIRED?
Amendment to a Contract
No
BACKGROUNDMUSTIFICATION:
At the January 16, 2016, Public Works Subcommittee meeting, it was agreed that additional engineering
services were needed for West WWTF Digester Improvement project and the Subcommittee
recommended Council approval. That final step of Council approval was inadvertently missed; thus, the
request for Council approval now.
Below is a summary of the matter from Scott Schaefer, AE2S:
Three alternates were bid with the West WWTF Digester Improvements. Alternates 2 and 3 were
controls and SCADA alternates, which were added to the scope of the project during the detailed design
after it was determined that planned upgrades could be delivered more cost effectively as part of the
digester upgrades. The additional scope and engineering effort was discussed at the Public Works Sub -
Committee on January 19th, 2016, and the decision was made to move forward with the potential
alternates. The work was completed for the bid package, but the engineering time was accounted for in
a separate Oroject number that has not yet been incorporated into the design contract/billing in the
accounting system. Request to approve the amendment for this work in the pre -determined amount of
$10,000. Note that Alternate 1 was an odor control until, and the scope increase was handled under a
pre-existing Interim Odor Mitigation job/task number.
SUPPORTING DOCUMENTS: X o ATTACHED ❑ NONE
POSSIBLE MOTION
Please word motion as you would like it to appear in the minutes.
Motion to approve amendment to the West WWTF Digester Improvement engineering contract with
AE2S for additional design services for alternates in an amount not to exceed $10,000.
BUDGET INFORMATION
FUNDING BUDGETED: ❑ YES
Wastewater Fund
❑ NO
Otsego West WWTF Digester Improvements
Alternate 2 and 3 Summary
Public Works Sub -Committee, January 19, 2016
1. General Summary of Control Alternates
Alternate 2 and Alternate 3 were added to the project relatively late in the design
process as it was realized that potential savings could be realized with an upgrade of
the West WWTF main PLC controls (Alternate 2) and that the city-wide SCADA
system should also be upgraded (Alternate 3).
II. Alternate Cost Summary
a. Base Bid Cost of PLC: $38,000
b. Alt 2 = $50,400 increase over base bid
c. Alt 3 = $8,600 increase over base bid
III. Base Bid Package
a. Bid Scope
i. Control Panel SCP-3A $15,500
ii. SCP-3 Operator Interface $2,000
iii. Panel Installation Labor $3,500
iv. Startup $10,000
v. Upgraded Allen-Bradley SLC PLC Processor $7,000
1. This PLC would be obsolete upon programmed upgrade (in the
CIP) to Controllogix
2. Approximately $20,000 in programming would be required during
construction that would also be wasted
b. Programming during construction — approximately $30,000
IV. Alternate 2 Detail
a. Alternate 2 Bid Scope:
i. Control Panel SCP-1 Upgrades (new PLC, new operator interface, new
Ethernet switch, new radio, installation) $28,600
ii. Control Panel SCP-2 Upgrades (new PLC, new operator interface, new
Ethernet switch, new radio, installation) $14,600
iii. Control Panel SCP-3 Upgrades (new PLC, new Ethernet switch, new
radio, installation) $14,200
iv. Remove SLC PLC Processor from Base Bid-$7,000
v. Base plus Alt 2.: $57,400 - $7,000 = $50,400
b. Approximate $20,000 increase in programming cost over base
V. Alternate 3 Detail
a. Alternate 3 Bid Scope:
i. Tower 2 Upgrades (new PLC, new Ethernet switch, new radio,
installation) $8,600
b. Approximate $22,000 increase in programming (this is the master telemetry site
for communication between all Otsego sites and will need to modify PLC logic at
all sites.)
VI. Notes
a. Costs are within approximately plus/minus 10-percent.
b. Additional design for alternates: $10,000 (max)
REDS.
Thfnk Big. Go Beyond.