HomeMy WebLinkAboutCO 4 CAG-18-001 , CO #4-19
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Change Order No. 4
Contract Title: NE 315t St Bridge Replacement Project
Contractor: Hamilton Construction Co.
Contract No. : CAG 18-001
Federal Aid No. : BROS-1070(009)
® Ordered by Engineer
❑ Proposed by the Contractor(VECP)
0 Unilateral
Original Contract Amount: $1,255,999.00 Original Contract Working Days: 80
Current Contract Amount: $1,254,099.00 Current Contract Working Days: 89*
Estimated Net Change This Order: $5,800.00 Added Working Days: 1
New Contract Amount: $1,259,899.00 Total Contract Working Days: 90
*Note:Minor Change No I added 2 Working Days,Minor Change No.2 added 2 Working Days,Minor Change No.3 added 3 Working Days.
Prep ed By: Issu By:
2 / 449//1 y
Resiidont-Engin8 . Date Engineer(City of Renton Transportation Dat(
Cray of 4,14-0„ Projcei Mo."43er - Design Manager)
Reviewed By: Consent By:
Engineer of Record Date Surety(Greater than 25%cost and/or 20% Date
time Increase)
Rev wed By: Endorsed By:
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City o R ntonManager Date C
/re s. bef%yh Executed By:
Reviewed By:
X/1 en q 4 9/hni,e/r/k^ Mj'a jI i
City Attorney(Greater than$35,000 Date City of Rton Public Works Date
and/or change In scope) Administrator/Mayor
Change Order No. 4
Contract Title: NE 31st St Bridge Replacement Project
Contract No. CAG-1B-001 Page 1 of 5
THE CONTRACT IS MODIFIED AS FOLLOWS:
Description of Change:
• Replace Special Provision Section 8-26 Fish Habitat Logs with the following:
8-26 FISH HABITAT LOGS
Section 8-26 is a new section.
8-26.1 Description
This work shall consist of fashioning Fish Habitat Logs from a-maxi -of three (3)trees
one (1) tree designated for removal in the plans and two (2) cedar tree logs, provided by
the Contracting Agency. and 1n5tauing them where dlesig„ated 1n the Plans or directed
by the Engineer. This work shall also consist of installing the Fish Habitat Logs as
directed by the Engineer.
8-26.2 Materials
Fish Habitat Logs shall meet the following requirements:
1. Each Log shall consist of a rootwad and trunk.
2. The trunk diameter shall be a minimum of 1.5 feet, measured four (4) feet above the
ground when the tree is standing.
3. The trunk length shall be a minimum of 15 feet, measured from the cut end of the
trunk to the top of the rootwad.
4. The rootwad diameter shall be a minimum of three (3) feet with roots intact. Roots
shall be free of rocks and soil prior to installation.
8-26.3 Construction Requirements
The Contractor shall exercise care when installing the Fish Habitat Logs to minimize
disturbance of waterways and prevent sediment or pollutant discharge into water. The
Contractor shall follow TESC Plan to meet water quality standards.
The Contractor shall install each Fish Habitat Log at the locations and orientations
zh^wn in the D1anc or directed by the Engineer.The Contractor shall exercise care
when fashioning and installing Fish Habitat Logs to avoid damage to the trunks and
rootwads.
Acceptance of Fish Habitat Logs will be based upon visual inspection of the Engineer.
Change Order No. 4
Contract Title: NE 31st St Bridge Replacement Project
Contract No. CAG-18-001 Page 2 of 5
8-26.4 Measurement
The fashioning and installation of Fish Habitat Logs shall be by Force Account.
8-26.5 Payment
"Fish Habitat Logs", shall be performed by Force Account as provided in Section 1-09.6.
For the purpose of providing a common Proposal for all Bidders,the Contracting Agency
has entered an amount for "Fish Habitat Logs" in the Proposal to become part of the
total Bid by the Contractor.
Reason for Change:
On July 27, 2018, the Washington State Department of Fish and Wildlife (WDFW) visited the site
to review construction activities and compliance with the Hydraulic Permit Approval (HPA)
issued for the project. This visit resulted in an on-site meeting on August 1, 2018. This meeting
was attended by the City, WDFW and the City's environmental and hydraulic consultants. The
purpose of the meeting was to discuss the placement of large woody debris for the project.
The original contract called for the placement of large woody debris using trunks and rootwads
from trees cleared for the project. The original plan required three (3) trees to be used for this
purpose, all to be placed on the banks of May Creek, downstream from the bridge (two (2) on
the right bank and one (1) on the left bank). The intent was to select trees of a sufficiently large
size so that the creek could not move them during flood events. However, large diameter tree
trunks lead to larger rootwads, increasing the weight and making it very difficult to move if the
trees are too large. As a result, the largest diameter trees cleared for the project were not
selected for use as large woody debris. Three (3) moderately sized cottonwoods were removed
and saved for this purpose. Unfortunately, these cottonwoods could move in a flood event.
Installing these cottonwoods into the stream embankment may reduce the probability of
movement. However, cottonwoods are not hard woods and surrounding the trunks with wet
soil would cause them to rot at a rapid rate,thus defeating the long term purpose for placing
the large woody debris. WDFW did not consider this to be entirely compliant with the HPA
issued for the project. The suggestion was to use conifers instead of cottonwoods. The City was
able to supply two (2) cedar logs with rootwads for this purpose. WDFW accepted the
substitution of two (2) cedar logs for (2) cottonwoods.
The alignment of the creek under the bridge is almost perpendicular to the street alignment.
Upstream from the bridge, the alignment of the creek is parallel to the street alignment. This
results in a very sharp turn in the creek at the upstream side of the bridge.To prevent erosion
of the streambank at this bend, WDFW suggested placing one (1) of the cedar logs at the bend
(right bank), using the rootwad to deflect the channel flow and create habitat for salmonids. To
create this habitat and fulfill the HPA requirements,the tree needed to be buried deep enough
in the embankment for the rootwad to engage the stream. This required additional excavation.
Change Order No. 4
Contract Title: NE 31st St Bridge Replacement Project
Contract No. CAG-18-001 Page 3 of 5
This additional work was performed on August 3, 2018 and tracked by Force Account. Refer to
Force Account Sheet No. 500.
At the downstream side of the bridge,the main stream channel flows along the right bank.
WDFW suggested that the second cedar log be buried in the right bank with the rootwad in the
stream. This required additional excavation.This additional work was performed on August 3,
2018 and tracked by Force Account. Refer to Force Account Sheet No. 500.
In order to excavate, set and bury the cedar logs in the embankment without increasing the
turbidity in May Creek, the water had to be temporarily shifted away from the right bank. This
necessitated adjusting the sandbags previously placed for the embankment excavation isolation
system. It also required the use of submersible pumps to dewater the areas between the
sandbags and the right bank. This additional work was performed on August 3, 2018 and
tracked by Force Account. Refer to Force Account Sheet No. 500.
Two (2) McClung trucks were on standby waiting for the excavator to set the submersible
pumps. This occurred on August 3, 2018 and was tracked by Force Account. Refer to Force
Account Sheet No. 465.
Materials:
Two (2) Western Red Cedar logs with rootwads, provided by the City.
Plans:
No changes were made to the drawings.
Adjustment:
This Change Order includes changes as defined in Section 1-04.4. Specifically, altering
specifications.
Extension of Time:
The Time for Completion is extended 1 non-compensable Working Days in accordance with
Section 1-08.8.
Equitable Adjustment:
This Change Order does not include an equitable adjustment since overhead and profit are
contained in the Force Account markup. The estimate is attached.
Change Order No. 4
Contract Title: NE 31st St Bridge Replacement Project
Contract No. CAG-18-001 Page 4 of 5
Sections 1-04.4 and 1-04.5 of the 2016 WSDOT/APWA Standard Specifications shall govern
this Change Order.The Work of the referenced Contract is modified to include the changes
detailed herein.The payment provided for herein shall constitute the complete and final
settlement for all costs of labor, equipment, materials, overhead, profit, permit fees, and all
other claims that may be made by the Contractor as a result of this change.
Attachments:
Forms to be attached to Change Order
❑ Plans
❑ Field Directive
❑ Change Order Quotation
® Estimated Change Order Cost
❑ Project Labor List
❑ Force Account Equipment Rate Request (DOT Form 422-010 EF)
❑ Equitable Adjustment Determination
Change Order No. 4
Contract Title: NE 31st St Bridge Replacement Project
Contract No. CAG-18-001 Page 5 of 5
Contract Number:CAG-18-001
Contract Title:NE 31st St Bridge Replacement Project
Estimated Change Order Cost Change Order No.4
Bid Item No. Description Quantity Unit Unit Price Estimated Cost
Force Account
Item description
Labor-McClung Dump Truck Driver 3 Hours $65.47 $196.41
Labor-McClung DT&T Driver 3 Hours $66.53 $199.59
Labor-McClung Operator 3 Hours $76.89 $230.67
Labor-McClung Mini Operator 7 Hours $76.29 $534.03
Labor-McClung Laborer 24 Hours $58.79 $1,410.96
Labor-McClung Laborer(OT) 6 Hours $82.08 $492.48
Labor Subtotal $3,064.14
Labor Markup 29% $888.60
Labor Total $3,952.74
Equipment-McClung 2018 Kenworth T880 Tractor 3 Hours $61.93 $185.79
Equipment-McClung 2018 Trail King Sidedump Trailer 3 Hours $16.13 $48.39
Equipment-McClung 1976 Kenworth Dump Truck 3 Hours $61.23 $183.69
Equipment-McClung 1973 3 axle puptrailer 3 Hours $16.13 $48.39
Equipment-McClung Volvo 290 Excavator 3 Hours $121.14 $363.42
Equipment-McClung Hitachi 50 Mini Excavator 7 Hours $17.92 $125.44
Equipment-McClung Ford F 150 Truck 3 Hours $15.48 $46.44
Equipment Subtotal $1,001.56
Equipment Markup 21% $210.33
Equipment Total $1,211.89
Materials Estimate $0.00
Materials Subtotal $0.00
Materials Markup 21% $0.00
Materials Total $0.00
Services Estimate $0.00
Services Subtotal $0.00
Services Markup 21% $0.00
Services Total $0.00
Mobilization Estimate $0.00
Total Subcontractor Work Estimate $5,164.63
Prime Markup for Subcontractor Work 12%,10%,7% $619.76
Total for Subcontractor Work $5,784.38
Force Account Total $5,784.38
Bid Item Change
$
Bid Item Change Total $ -
Equitable Adjustment
Per attached determination Estimate $ -
Calculated Cost $ 5,784.38
Estimated Change Order Cost $ 5,800.00
•
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