HomeMy WebLinkAbout20100621 - VI-09MEMO
To: Honorable Mayor and City Council
From: Nick Egger — City Engineer
Date: June 11, 2010
Re: Change Order #I for 2010 Infrastructure Improvements
Enclosed for Council approval is Change Order #1. This change order makes adjustments to unit prices
for an existing bid item and also adds a new work item to the contract.
City staff and the Contractor have agreed to substitute some of the reclaimed (ground up) pavement for
new base material that was originally prescribed to be placed on the streets receiving more substantial
reconstruction (Westview Drive north of North Frontage Road, Lyn Way south of Bahls Drive, Pleasant
Drive between 12 Street and Highway 55). The use of this material presents no concerns for the design,
as it is the exact method that is being used in most places on the project. The only difference in procedure
in this case is that the excess material taken off of the streets receiving the full -depth recycling (grinding)
will be hauled to the streets mentioned above, spread out and compacted just a new gravel. An amount of
new gravel material has been left in the contract in the event that some needs to be used, but the quantity
has been drastically reduced.
If logistics and phasing allow for the full implementation of this method, it would result in a reduction to
the original contract value of approximately $40,000.
CITY OF HASTINGS
ENGINEERING DEPARTMENT
CHANGE ORDER # 1
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, to modify the quantity of an existing bid item, and to modify testing procedures for work included in the original
contract.
I . New Unit Item -- HAUL & PLACE RECLAIMED BASE MATERIAL
➢ The City has approved the use of Reclaimed Bituminous Pavement as a substitute for the AGG BASE CL 5
(STREET) line item. The measurement of this material shall be as per dimension measurements from the
standard cross sections indicated on pages 5 and 6 of the plans, and then converted to total tonnage placed by
multiplying the cubic yards placed by 2.0 Tons /CY. The requirements of Section 700 of the project
specifications for the gradation and compaction of this material remain in effect.
➢ The quantity of the existing bid item #17 - AGG BASE CL 5 (STREET) is also modified from the original
quantity.
The unit price for the new item and the revision to the quantity of the existing bid item are as follows:
ITEM
ORIGINAL
REVISED
UNIT
TOTAL
NO.
DESCRIPTION
UNIT
(QUANTITY
QUANTITY
PRICE
CHANGE
AGG BASE CL 5
17
(STREET
TON
6635
635
$9.52
- $57,120.00
HAUL & PLACE
108
RECLAIMED BASE
TON
NIA
6000
$3.00
$18 ,000 .00
MATERIAL (P
ESTIMATED CHANGE IN TOTAL CONTRACT AMOUNT
- $39,120.00
2. Change in Specifications:
As is stated in Section 700 of the Specifications for the' project, currently compaction testing for Class V, Class
VIZ, and Reclaimed Bituminous Road Base materials is to be performed using sand cone density test procedures.
This shall hereby be revised such that compaction testing on these materials is to be performed by using the
Dynamic Cone Penetrometer and modified Dynamic Cone Penetrometer (when applicable by MnDOT
specifications).
Approved By: Accepted By:�
City Engineer Hardrive I c. Author' ed epresenta ve
Date: it Date: �Jq 1