HomeMy WebLinkAboutAgenda - 05-20-2008-e2cA-~~,.~- a-~
%~ ~~ Cortsnit=~ C~ineers ova /~#~ pied cScierr,~isfs Memorandum
OLVER
INCORPORATED
To: Transfer Station Siting Team Members HATE: May 8, 2008
FROIvf: Bob Sallach OLVER PROJECT NUMBER:
RE: Break-Even Haul Analysis
Orange County Transfer Station Siting
A transfer station becomes economically feasible when it reduces the costs of transporting waste to a final
disposal or transfer site as compared to hauling the waste directly in collection vehicles. A break-even
analysis can be developed to identify the minimum distance at which transfer haul becomes more economical
than direct haul.
Evaluation parameters include haul travel time to transfer or disposal site; transportation costs per hour;
vehicle payload; and transfer station operations costs.
Direct Haul Cost = [Truck Operating Cost ($/hr) ~ Miles (round trip] /[Miles Per Hour x Payload
(tons)]
Transfer Haul Cost = [Truck Operating Cost ($/hr) x Miles (round trip] / [Miles Per Hour x Payload
(tons)] + Transfer Station Operations Cost ($/ton)
Direct haul and transfer haul costs are calculated for various distances to identify the point at which the costs
are equal (break-even distance). Any distance greater than the calculated break-even distance indicates that
transfer haul for that distance is more economical than direct haul. The break-even distance is significantly
impacted by travel time, which is a function of transportation network from the end of the collection route to
the disposal or transfer site.
For the purposes of potential site identification (exclusionary screening process), the projected 202 ~~craste
generation centroid (population and employment center) for the county has been used to establish the break-
even haul distance along the selected major transportation corridors: 15-501, NC ~4, NC 86 (excluding NC
86 north ofHillsbourgh), US 70, I-40, and 1-8~. Based upon the attached analysis, the break-even distance
from the waste generation centroid is approximately 10-road miles. As a general ntle in urban axed suburban
areas, transfer stations should be no more than 10 miles away from the end of all collection routes.'
It should be noted that the direct haul distance from the end of the current collection routes of the municipal
and private haulers may exceed 10 miles depending upon the final location of the transfer station using the
proposed 12-mile exclusionary criteria. This analysis does not take into account the additional off-route time
of a collection vehicle resulting from increased distance to the final transfer location.
RCS/det
Attaclunents
' U.S. EPA, Office of Solid Waste. 2002. Wasfer Transfer Sfafions: A Manual for Decision-Making
J.•~ProJeclslChmrgaCauujrh015I1DOCSL00S OS-OS-Brunk-Even (Jrrrmrce.rlnc
I31:uksburg, VA
i2lchmond, VA
CnrS~, NC
Chnrlottc, NC
eSaving `Virginia and the Carolinas for ova 30 years
8720 Red Oak Boulevard, Saite SOS ehaaa: (704) 527-3227
C6artottc, NC 28217 cr. (704) 527-3228
www.olvercom
Orange County
Transfer Station Siting
Direct Haul Distance Evaluation
$14.00
$12.00
c $10.00
F-
~ $8.00
a- $6.00
~j $4.00
$2.00
$0.00
ASSUMPTIONS
Direct Haul
Break-Even Analysis
Direct Haul
- Transfer Haul Cost
0 5 10 15
One-Way. Haul Distance -Miles
Payload, (Tons) 9
Truck Operating Cost, ($/hr) $85.00
Average Travel Speed, (mph) 30
Transfer Haul
Payload, (Tons) 21
Truck Operating Cost,($/hr) $80.00
Average Travel Speed, (mph) 30
Transfer Station Operating Cost $4.00
One-Way Haul Distance 0 5 10 15 20
Direct Haul Cost $0.00 $3.15 $6.30 $9.44 $12.59
Transfer Haul Cost $4.00 $5.27 $6.54 $7.81 $9.08
20
~~ 12 Mile Marker 0 Commercial Node
^ 10 Mile..Marker ~~` Rural Industrial'Node
Q Mean Center 2025 ~ .Commercial Industrial Node
r` (weighted by pop and emp) ,
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