HomeMy WebLinkAboutChange Order - Landfill Cell 5 Area A ClosureDeschutes County Board of Commissioners
1300 NW Wall St., Suite 200, Bend, OR 97701-1960
(541) 388-6570 - Fax (541) 385-3202 - www.deschutes.org
AGENDA REQUEST & STAFF REPORT
For Board Business Meeting of June 30,2010
Please see directions for completing this document on the next page.
DATE: June 29, 2010
FROM: Timm Schimke Solid Waste 317-3177
TITLE OF AGENDA ITEM:
Consideration of Authorization for Contract Change Order, Knott Landfill Cell 5 -Area A Closure
PUBLIC HEARING ON THIS DATE? no
BACKGROUND AND POLICY IMPLICATIONS:
See staff report memo
FISCAL IMPLICATIONS:
The original contract prize was below budgeted amounts. There are sufficient funds budgeted to co ver
the cost of the change order which is estmated to be $305,000
RECOMMENDATION & ACTION REQUESTED:
Conditions that could not have been forseen have resulted in the need for the change order. We
recommend approval of change order request.
ATTENDANCE: Timm Schimke
DISTRIBUTION OF DOCUMENTS:
No documents generated by this request.
Lu Department of Solid Waste
61050 SE 27th Street • Bend, Oregon 97702
(541) 317 3163
FAX (541) 317 3959
To: BOCC
From: Timm Schimke
CC: Dave Kanner
Date: June 29, 2010
Re: Contract change order for Knott Landfill Cell 5 — Area A Project
Soils required for the closure of Area A have specific qualities that are not present in all soils
available at Knott Landfill. Layers of suitable soils are found at various depths, with unsuitable
layers of soils interspersed in the excavation. Through geotechnical methods and borings, our
engineers estimated the amount of suitable and unsuitable soils as well as the amount of rock in
the excavation, and bid documents specified an area of excavation and volume of excavation
within which adequate suitable soils were expected to be available.
Although our initial engineering estimates were as thorough as possible, it is not possible to
know exactly what conditions will be encountered in the field. A number of factors varied from
our assumptions, and the result is a shortage of suitable soils needed for the closure of Area A
in the original excavation area. The proposed change order authorizes additional excavation
needed to obtain sufficient suitable soils to finish the project. Obtaining the suitable soils
requires the excavation of a sizable amount of unsuitable soils which will be placed in stockpile
near our land filling operations for daily use.
The extra excavation will be paid at the current contract price or unit rate. The contract is
structured with a price for excavation and an additional price for placement of the excavated
materials. There are several different placement areas, each having a different placement
price. For placement of materials in stockpile, a new price was negotiated based on the price of
placement of materials nearby, but with deductions for equipment that is not needed for simple
stockpiling placement.
The total estimate of additional cost to the contract from this change order is $305,000.00. The
work will be directed in such a manner that if we can obtain the needed soils without performing
all of the excavation, we will realize a savings from this cost estimate.
We are seeking BOCC permission for Dave Kanner to sign the change order documents. I
have attached a spreadsheet detailing the work and costs.
Quality Services Performed with Pride
Knott Landfill CeII 5 - Area A Closure
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