HomeMy WebLinkAboutCO 15 CHANGE ORDER
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At cinson Construction 0110.44 CORIUM 11.381.168.70
707 S.Grady Way Ste 500 Pumas Mamma 908.375.42
Renton.WA 98057 PialOUS EMMONS, 0.0Q
PROJICTs PPROXIS TOM 12.313.722.12
Stnmder Blvd.SW 276 St Extenaiqg Owee(ma), 338235.42
Phase 1
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MINIM TOTAIs 12.821.967.81
Sedans 1-04.4 and 1-04.5 of the 2010 Standsrd Specifications shell govern the issuance of this Change Order The work of
this contract is herein modified to include the than detailed below. Additional quantities for existing and new items shall
constitute the complete and final settianent for all costs of litho;material,equipment,overhead,profit,permit fees,damages
(whether direct or indirect),and all other claims by the contractor as a result of this dune.
The time for completion&changed by Ms Amor Order
a working days are hereby added to the contract.
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Page 1 of 3 • of Iowan se
14171,1.71i4:;;!1'71'
CITY OF RENTON
CHANGE ORDER
Atkinson averredlen
$Oder SW.,,SW 27"St Gdersion
Charps Order No.15
Mardi 21,2014
Reason for Change:
Two conflicts exist with the Phase 2 tie-backs installation;conflicts with the drilling equipment and
the Phase 1 sheets;conflicts between the Phase 1 sheets and the Phase 2 walers.Atkinson is asking for
both compensable working days for the delay,and direct costs associated with the shoring conflicts.
The following arplanation provides background info on and details the reason for the change.
Description:
gitilikkakDiSiRadfigRment
The Phase 2 tie-backs are in close proximity to the Phase 1 sheet piles at the north and south piles just
east of the Main 1 shoofly tracks. The distance between the anchor and the Phase 1 sheets shown on
the plans is 2 feet-4.5 inches on the north wall and 2 feet,-6 inches on the south wall. An RFI was
received from Atkinson on 5/22/2013 Ming that the drilling equipment required at least 40 inches of
lateral space from center of tie-back in order to drill the tiebacks 53A,53B,53C,MA,MB and MC.
Hanson provided a re-design of the tie-backs at 6 foot offset from the Phase 1 sheets to accommodate
the dolling equipment as requested by the Contactor.
This re-design required greater anchor loads of 315 kips for anchors 53B and 54B.The Contractor did
not want to pull those high loads with their equipment.The second option was to cut off a 24 foot sec-
tion of the Phase 1 sheet piles as the excavation proceeded on the north and south walls that are in
conflict with the equipment and offset the tiebacks another 6 inches west This would allow drilling of
the conflicted anchors adjacent to the Phase 1 sheets. See RFI Transmittal No.491 sent on 7/3t2013.
Cutting a section of sheet pile was the option Atkinson chose to do as they had concerns with pulling
the high loads required on the revised anchor design.In order to accommodate the work,the Contrac-
tor had to excavate down to the first row of tie-backs and cut the 24 foot section of Phase 1 sheets that
were in conflict There was also a BNSF walkway that needed to be removed and reinstalled. The
Contactor excavated down to the second row of tie-backs after stressing the first row,and removed
another 24 foot section of Phase 1 sheets.The Contractor placed some plywood on top of the second
cut to serve as a walkway.After stressing the second row of tie-backs the Contractor excavated down
to the third row and the Phase 1 sheets were cart and removed
This change compensates Atkinson for$308,235.69. A total of 33 working days will be added to the
Contract which includes 26 compensable working days and an additional 7 non-compensable working
days. Anew bid item will also be created for Phase 2 Shoring Conflicts.
Add the Following New Items to Contract CAG 11-133:
New Bid Item SA-158"Phase 2 Shoring Conflict-LS"compensates the Contractor for all,
overhead,labor and equipment associated with the installation of the tie-backs.
New Item SA-158 Phase 2 Shoring Conflict
By Lump Sum @ $308,235.69
Paps 2 of 3
CITY OF RENTON
CHANGE ORDER
Atkinson Gartwalon
*sander Blvd,SW 27"St Extension
Chaps Order No.1 S
Motu 21,2014
lbtal this Change Order 5308,235.69
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