HomeMy WebLinkAbout20100802 - VI-03
MEMO
To:
Honorable Mayor and City Council
From:
Nick Egger – City Engineer
Date:
July 26, 2010
Re:
Change Order #2 for 2010 Infrastructure Improvements
It was determined during the design phase of the 2010 Infrastructure Improvements project that adding
asphalt emulsion to the remaining reclaimed (ground up pavement) material would be necessary on
Westview Drive south of Highway 55. Adding the emulsion is necessary because the amount of existing
blacktop material on this section of Westview Drive was not high enough to provide adequate structural
capacity after being ground in with the underlying gravel. In order to overcome this deficiency, asphalt
emulsion oil is mixed together with the reclaimed material.
Although an estimate of the amount of asphalt emulsion oil needed was accounted for in the original
project plans and specifications, the party responsible for the work of field sampling and laboratory
testing to create a mixture design was not indicated, and therefore not accounted for in the unit prices.
This change order specifies that the Contractor will provide the mixture design work, and creates a new
unit item to compensate the contractor for providing a mixture design for the asphalt injection process that
will be performed on the reclaimed (ground up) pavement material on Westview Drive south of Highway
55.
Enclosed for Council approval is Change Order #2.
Thus far, the estimated total impact of change orders on this project amount to a reduction of $32,415.50,
or about 1.69% of the total contract value.
2010 Infrastructure Improvements Change Order Summary
Change
OrderDate Items Estimated Value
1 6/11/2010 Substitution of Reclaimed Material for New Gravel -$39,120.00
2 7/26/2010 Mixture Design for Asphalt Emulsion $6,704.50
Net Total Increase-$32,415.50
Original Contract Value$1,915,445.39
Change Orders as Percentage of Contract Value-1.69%
úÔÉÄ Î× õÜÊÉÔÏÖÊ
øÏÖÔÏØØËÔÏÖ ùØÍÜËÉÐØÏÉ
úÕÜÏÖØ îËÙØË
Contractor: Hardrives, Inc. City Project No.: 2010-1
Address: 14475 Quiram Drive S.A.P. Nos. 130-129-016 & 130-135-003
Rogers, MN 55374
Contract Name: 2010 Infrastructure Improvements
The City of Hastings and Hardrives, Inc. hereby agree to this change order for the addition of a new unit item for the original
contract bid for the determination of a mixture design to add asphalt emulsion to reclaimed material as prescribed by the plans.
1.New Unit Item – ASPHALT EMULSION MIXTURE DESIGN
A mixture design for adding asphalt emulsion to reclaimed material is required prior to proceeding with the
mixing work. The mixture design has been provided by Hardrives using American Engineering Testing, Inc. as
the design consultant. The total cost for this item is listed in the table below and includes all markups and
adjustments. A copy of the invoice from AET, Inc has also been attached for reference.
The unit price for the new item and the revision to the quantity of the existing bid item are as follows:
ITEM ORIGINAL REVISED UNITTOTAL
NO. DESCRIPTION UNIT QUANTITY QUANTITY PRICE CHANGE
ASPHALT EMULSION
109LS N/A 1 $6,704.50 $6,704.50
MIXTURE DESIGN
ESTIMATED CHANGE IN TOTAL CONTRACT AMOUNT $6,704.50
Approved By: ____________________________ Accepted By: ______________________________
City Engineer Hardrives, Inc. Authorized Representative
Date: Date:
1
èÍÈÛÐÅ
ÏÛÊÑÇÌÿ