HomeMy WebLinkAbout25. 12-341JUNE 26, 2012 12 -341 RESOLUTION
(CARRIED 7 -0 LOST LAID OVER WITHDRAWN )
PURPOSE: APPROVE CHANGE ORDER NO. 1 FOR CITY CENTER
RIVERWALK IMPROVEMENTS WITH LUNDA CONSTRUCTION
(+$254,858.00)
INITIATED BY: COMMUNITY DEVELOPMENT
BE IT RESOLVED by the Common Council of the City of Oshkosh that the
following Change Order, copy of which is attached, is hereby approved:
LUNDA CONSTRUCTION
2000 Taylor Street
Little Chute, WI 54140
Net Increase to contract $254,858.00
PURPOSE: See attached
BE IT FURTHER RESOLVED that money for this purpose is hereby appropriated
from Account No. 530 - 1040 - 7216 -07278 TID #17 Fund — Land Improvements.
(41)
OfHKO.IH
ON THE WATER
TO: Honorable Mayor and members of the Common Council
FROM: Allen Davis, Community Development Director
DATE: June 21, 2012
SUBJECT: Approve Change Order#1 —Lunda Construction for the City Center
Riverwalk seawall and tie-rods (+$254,858)
BACKGROUND
In the course of beginning the demolition work on the hotel segment of the Riverwalk,
AECOM, the City's engineers on the project, discovered that there are tie-rods that
connect the seawall into the foundation of the hotel. There appear to be 13 tie-rods, 2
have broken and 2 have deteriorated significantly. The condition of all the tie-rods is
unknown because removing the hotel's concrete patio to examine all the tie-rods may
endanger the remaining structural support for the seawall. The City was not aware of the
tie-rods until after the design and bidding work was done and the new hotel owners found
drawings of the tie-rods in the hotel's storage.
ANALYSIS
The tie-rods serve as a structural connection between the seawall and the hotel
foundation. This is a concern because the tie-rods are deteriorating, the long-term
maintenance of the tie-rods will be difficult and the tie rods will need to be replaced in
about 25 years. In addition, changes to the hotel's foundation could affect the seawall
and vice versa. City staff asked that a better, longer term solution be explored taking into
consideration that the revised design must also adhere to the Riverwalk project schedule
and budget.
AECOM explored a number of options in concert with City staff and Lunda
Construction, the contractor on the project. The best solution at this point in time appears
to be drilling new sockets into the bedrock 30 feet under the hotel and anchoring new tie-
rods into the new sockets in the bedrock. In addition, large rocks (rip-rap) would be
placed along the bottom of the seawall within the Fox River which WisDNR has now
permitted. After the new tie-rods are installed, the existing tie-rods connected to the hotel
foundation could be removed and the concrete patio replaced.
The extra work could be done in about 1 to 2 months independent of other construction
work and the project would stay on schedule. The proposed solution would also produce
a 50 year life expectancy for the seawall. The estimate for the new tie-rods and rip-rap
would come to $254,858.
FISCAL IMPACT
The City had obtained the following grants for the project:
• $644,952 for docks and riverwalk.
• $ 45,000 for riverwalk
The City has 2 existing Tax Increment Finance (TIF) districts that can pay for the City
Center riverwalk improvements and the new TIF district for the hotel will also pay for
riverwalk improvements.
The current construction contract for the base bid and the hotel alternate is
$3,898,630.80. The change order of$254,858 is a 7% increase. There is $300,000 in the
contingency budget for this Riverwalk segment.
RECOMMENDATION
The City Council approves Change Order#1 for the Riverwalk seawall tie-rod anchoring
project.
Approved,
City Manager
•
CITY OF
0, H (,OJ H REQUEST FOR QUOTATION
ON THE WATER
CHANGE ORDER NO.: I
TO CONTRACTOR: Lunda Construction Inc.
PROJECT: City Center Riverwalk PROJECT NO: 60250465
OWNER: City Of Oshkosh
ENGINEER: AECOM
The following modification(s)to the Contract are hereby ordered (use additional pages if required):
Provide and install approximately 12 rock anchors per the attached Specification 02164—Rock Anchors and as follows. Rock
anchors to be drilled through approximately 60 feet of soil and 25 feet of rock. Anchors will be installed at an angle of 45
degrees from horizontal. Anchors will be installed from the riverside of the existing steel sheet pile wall. Penetrations through
the wall to accommodate the anchors will be required and are considered incidental to the construction. Anchors will be
required to support a minimum allowable tensile load of 40,000 pounds. All anchors are to be proof tested to 133% of the
allowable load. One performance test to 150%of the design load will be required on the first production anchor. The
contractor will provide the required equipment and personnel to perform the load testing. The load testing is considered
incidental to the construction. Payment is based on a total of 12.
12 Rock Anchors $91,060.00 Lump sum
Mobilization/Demobilization $62,688.00 Lump sum, Rock Anchors $7,588.00 each
Provide and install approximately 250 LF of a new W16x40 structural steel waler along the sea wall as referenced above.
Waler to be welded or bolted in place to sheets with minimum 2 inch long 3/8 fillet welds or 1-inch diameter nelson studs. Full
penetration welds required on all splices. Contractor to include typical gussets and reinforcement in waler for tie back
connection. All wafers will be constructed from grade 50 steel or stronger. Payment is on a lump sum basis. Price to include
all investigation work,supplies and labor incurred to date
Provide and Install 250 LF of W16X40 Waler$44,110.00 lump sum
Reason for Modification(s): Hotel Sea wall construction was not constructed as anticipated or designed as determined
by exploratory openings in the existing Riverwalk structure. Two tie backs have failed and
several show signs of deterioration. Scouring of the river sediment has occurred and
structural improvements are required to meet current Army Corps of Engineers and AISC
design standards.
Contract Amount or Price I Contract Times(Calculate Days)
Original $ Original Duration Days
Previous Change Order(s) Previous Change Order(s)
(Add/Deduct) $ (Add/Deduct)
Days
This Change Order This Change Order
(Add/Deduct) $ (Add/Deduct) +38 Days
Revised Contract Amount $ Revised Contract Time Days
The Revised Contract Completion Date is:
, 20
Owner Contractor Engineer Recommendation
By: By: By:
Date: Date: Date:
B-3 REV 06/07 FORM 273
a t
CITY OF
OJHKOJH REQUEST FOR QUOTATION
ON THE WATER
CHANGE ORDER NO.: PA
TO CONTRACTOR: Lunda Construction Inc.
PROJECT: City Center Riverwalk PROJECT NO: 60250465
OWNER: City Of Oshkosh _
ENGINEER: AECOM
The following modification(s)to the Contract are hereby ordered(use additional pages if required):
Provide and install approximately 2000 tons of Heavy Riprap meeting 2012 WisDOT Standard Specifications Section 606
along 250 LF of the exterior of the existing sheet pile wall between Station 21+00 to 23+37(Hotel). Price to include
placement, verification immediately adjacent and approximately 8 feet outward from the sea wall during placement and
monthly for duration of the project. Payment will be based on a per ton basis of installed riprap per quarry scale tickets.
Minimum quantity to be installed is 600 tons.
Riprap$95.00 per ton
Reason for Modification(s): Hotel Sea wall construction was not constructed as anticipated or designed as determined
by exploratory openings in the existing Riverwalk structure. Two tie backs have failed and
several show signs of deterioration. Scouring of the river sediment has occurred and
structural improvements are required to meet current Army Corps of Engineers and AISC
sesign standards.
Contract Amount or Price Contract Times(Calculate Days)
Original $ Original Duration Days
Previous Change Order(s) Previous Change Order(s)
(Add/Deduct) $ (Add/Deduct) Days
This Change Order This Change Order
(Add/Deduct) $ (Add/Deduct) Days
Revised Contract Amount $ Revised Contract Time Days
The Revised Contract Completion Date is:
,20
Owner Contractor Engineer Recommendation
By: By: By:
Date: Date: Date:
B-3 REV 06/07 FORM 273