Order 2010-8-7 

Served: August 12, 2010 

UNITED STATES OF AMERICA 

DEPARTMENT OF TRANSPORTATION 

OFFICE OF THE SECRETARY 

WASHINGTON, D.C. 

Issued by the Department of Transportation 

on the 12'%f August, 2010 

INTRA-ALASKA MAINLINE 

SERVICE MAIL RATES 

Docket OST.2003-14695 

(Docket OST-95-429) 

ORDER TO SHOW CAUSE ESTABLISHING NEW 

MAINLINE SERVICE MAIL RATES 

Summary 

By this order, the Department proposes to establish new intra-Alaska mainline mail rates 

for the next annual period, beginning on or about October 1, 2010. The rates that are 

currently in effect were established by Order 2009-9-14, most recently adjusted by 

Order 2010-6-24 for first quarter 2010 fuel costs. The cost pool comprises the bulk of 

mainline carrier operations in Alaska, and consists of Alaska Airlines (AS), Lynden Air 

Cargo (LAC), Northern Air Cargo (NAC), and Tatonduk Outfitters, Ltd., d/b/a Everts Air 

Cargo (TOL).l 

Background 

Because mail rates are made effective on a final, prospective basis, but are based on 

historical costs, we project the costs for the upcoming rate year. Until we issued 

Order 2004-8-26, we had estimated the long-term trend of costs based on a ten-year moving 

average that only included NAC and AS, the only two carriers for which we, at that time, 

had ten years of data. Order 2004-8-26 changed that by calculating the long-term trend 

based on the most recent period for which we had data for all of the mainline carriers, 

which was a five-year period at the time. Since then, five additional years of data have 

become available, so, as contemplated by Order 2004-8-26, we propose to use a ten-year 

trend for all four carriers. 

The proposed rates, contained in Appendix A, reflect the application of cost adjustment 

factors, developed in Appendix B, to the basic mail rate structure established by the Civil 

Aeronautics Board in Order 82-11-23. We have used the carriers' reported operating 

expenses and traffic for the year ended March 31, 2010, and fuel costs for the quarter ended 

March 31, 2010, and have increased their non-fuel unit costs to the mid-point of the new 

' Era Aviation, Ltd., also provides service with mainline equipment, but is excluded from the cost pool 

because it transported a deminimis amount of mail - less than 1 percent of the total. 
rate period based on the long-term (ten-year) average annual changes in unit costs ~ 

nonfuel line haul and terminal — for all four carriers.2 

Results of the Updated Data 

The proposed rates, including fuel, differ from the rates currently in effect by the amounts 

shown in the following table: 

Line haul, $/RTM ^ 

Terminal, $/Pound Enplaned 

Priority 

Nonpriority 

Priority 

Nonpriority 

Order 2010-6-24 

$3.2041 

$1.9398 

$.3620 

$.3110 

Proposed 

$3.3341 

$2.0184 

$.3617 

$.3108 

Percentage Increase 3 

4.06 

4.05 

-0.08 

-0.06 

These rates reflect a combination of changes in most recent unit costs, and application of 

the long-term trend to those unit costs. As shown in the table, there was a significant 

increase in the line haul, which includes fuel, and a slight decrease in the terminal rate. The 

combination of those changes in the rates produces proposed rates that are 2.61 percent 

higher than those in effect for the current period for a 421-mile ^ average length of haul. 

General Matters 

As indicated, when Order 2004-8-26 issued we only had five years of data for all four 

carriers, but we anticipated adding additional years to the trend line until we had ten years 

of data. The prior annual update was the first with ten years of data, and going forward we 

must begin dropping off the data for the oldest year as we add the newest year for 

determining the long-term trend. Five carriers operated mainline aircraft in Alaska ~ AS, 

TOL, LAC, and NAC that we have included in the cost pool ~ and Era Aviation, Inc. 

Appendix E shows all of the mail transported by the five carriers currently operating 

mainline equipment in Alaska. We have tentatively excluded from the line haul calculation 

the data of those aircraft types transporting less than one percent of revenue ton miles of 

mail, and from the terminal calculation the data of those carriers enplaning less than one per 

cent of mail tons enplaned. Because Era Aviation did not meet the one percent threshold in 

either case, it is not part of the cost pool for either the line haul or terminal. 

To determine the long-term trend in non-fuel line haul and terminal expenses, we propose 

to continue our practice of separately regressing those expenses against time — in this 

instance, the ten-year period from the year ended March 31, 2001, through March 31, 2010. 

The results of both regressions are shown in Appendix C. 

2 We have continued our practice of updating fuel expenses on a quarterly basis, and have relied on fuel 

expenses for the quarter ended March 31, 2010, the most recent quarterly data available. We will update the 

rate final rate for QE 6/30/10 data when those become available. 

^ Any difference between Priority and Nonpriority is due to rounding. 

^ The proposed line haul rates above are the sum of non-fuel line haul expense, with a 10-year average 

inflation factor applied, plus the most recent fuel expense unadjusted for inflation. 

^ 22,853,334 RTMs of mail divided by 54,348 tons enplaned of mail from Appendix D. 
Nonfuel Line Haul Results 

As shown in Appendix C (Line Haul), the regression calculated an average annual increase 

of 2.53 percent in unit costs over the ten-year period, with a strong T-Value of 4.27, 

indicating that there is a consistent upward trend in the non-fuel line haul costs. Those costs 

increased from $0.57542 per available ton mile for the year ended March 31, 2009, to 

$0.61927 for the year ended March 31, 2010, or 7.62 percent. That increase was driven by 

Alaska Airlines' costs, which increased from $0.460870 in the prior year to $0.620837, or 

34.71 percent, as shown in Appendix D-1 of both this order and Order 2009-9-10. Alaska 

Airlines indicates the principal sources of that increase were the several new collective 

bargaining agreements it reached in 2009. The carrier's quarterly data filed with the 

Department are consistent with that explanation. 

The chart in Appendix C (Line Haul), depicting each year's data points and their deviation 

from the trend line, shows that the consistency of the trend is strong, and that this year's unit 

costs were slightly above the most recent 10-year trend. The average annual increase in the 

long-term trend has decreased from 2.84 percent per Order 2009-9-1, to 2.53 percent this 

year, notwithstanding that this year's results were above trend. The fact that the long-term 

trend has decreased reflects the dropping from the ten-year trend of the results for the year 

ended March 31, 2000, which were so significantly below the trend in Order 2009-9-1 (16.68 

percent below year March 31, 2001) that they more than offset the effect on the trend of the 

most recent 7.62 percent year-over-year increase. 

Terminal Results 

As shown in Appendix C-Terminal, the regression calculated an average annual increase of 

4.14 percent in unit costs over the ten-year period, with a strong T-Value of 9.91, indicating 

that there is a consistent upward trend in terminal costs. Those costs were basically stable, 

with a decrease from $386.29 for the year ended March 31, 2009, to $384.09 for the year 

ended March 31, 2010, or 0.57 percent. The overall flat result disguised that the unit 

terminal costs for LAC increased by 8.20 percent, only to be offset by a decrease in unit 

costs for TOL of 6.85 percent. 

The chart in Appendix C (Terminal), depicting each year's data points and their deviation 

from the trend line, shows that the consistency of the trend is strong, and that this year's unit 

costs were slightly below the trend. The most recent yccir result has driven down the average 

annual increase in the long-term trend from 3.80 percent per Order 2009-9-1, to 2.53 percent 

this year. The fact that the long-term trend has decreased reflects the dropping from the tenyear trend of the results for the year ended March 31, 2000, which were so significantly 

below the trend in Order 2009-9-1 (16.68 percent below year March 31, 2001) that they more 

than offset the effect on the trend of the most recent 0.57 percent year-over-year decrease. 

ACCORDINGLY, 

1. We direct all interested persons to show cause, no later than twenty (20) days after the 

date of service of this order, why the Department should not adopt the foregoing tentative 

findings and conclusions and fix, determine and publish the proposed final annual rates 

specified in Appendix A, to be effective on or about October 1, 2010, subject to the 
-4-

quarterly fuel adjustment, as discussed. Vague or unsupported Answers that do not include 

all proposed adjustments and backup data will not be accepted; 

2. If no objection is filed within the designated time, or if no timely-filed objection raises 

material issues of fact, we hereby delegate authority to the Director, Office of Aviation 

Analysis, to make the above rates final; 

3. This docket shall remain open until further order of the Department; and 

4. We will serve this order upon all parties on the Service List for this Docket. 

By: 

Susan L. Kurland 

Assistant Secretary for 

Aviation and International Affairs 

(SEAL) 

An electronic version of this document is available on the World Wide Web at 

http: //w w w .regul ations. gov 
Intra-Alaska Class Service Mail Rates 

Appendix A 

Effective: On or about October 1, 2010 

Column (1) (2) (3) (4) (5) 

Base Year 

Rates 1/ 

Adjustment 

Factors 2/ 

Proposed 

Final Rates 3/ 

Current Rate, 

Order 2010-6-24 

Change from 

Prior Rate 4/ 

Linehaul Charge per Billing Ton-Mile 

Priority 

Non-priority 

$1.1969 

$0.7246 

178.56% 

178.56% 

$3.3341 

$2.0184 

$3.2041 

$1.9398 

4.06% 

4.05% 

Terminal Charge per Pound Originated 

Priority 

Non-priority 

$0.1697 

$0.1458 

113.16% 

113.16% 

$.3617 

$.3108 

$.3620 

$.3110 

-0.08% 

-0.06% 

l/Per Order 82-11-23. 

2/ See Appendix B. 

3/ Column (1) increased by Column (2). 

4/ Any differences due to rounding. 
Intra-Alaska Class Service Mail Rates Cost Adjustment Factors 

Appendix B 

(1) (2) (3) (4) (5) (6) 

Base Year 

Ended 

9/30/80 1/ 

Year Ended 

3/31/10 2/ 

Average Annual 

Change 

YE 3/31/01 

to YE 3/31/10 3/ 

Midpoint to 

Midpoint 

Change 4/ 

Estimated 

Unit Cost at 

4/1/11 5/ 

Percent 

Change 1980 

Base Year to 

4/1/11 6/ 

Unit Cost per Available Ton-Mile 

Fuel 

Nonfuel 

Total $0.399469 

$0.46978 

$0.61927 

$1.08905 

na 

2.53% 

na 

3.83% 

$0.469780 

$0.642988 

$1.112768 178.56% 

Unit Cost per Ton Enplaned $191.54 $384.09 4.14% 6.30% $408.29 113.16% 

I/Per Order 82-11-23, updated most recently in Order 97-12-24. 

2/ See Appendix D. For nonfuel, we used YE March 31, 2010; for fuel expense, we used QE March 31, 2010, 

the most recently available. 

3/ See the regression results in Appendix C. 

4/ Reflects the fact that from the mid point of the reporting period to the midpoint of the prospective rate is 1 and 1/2 years. 

1.0253 X 1.01265 where 1.01265 is the average annual unit cost increase projected for a 6-month period. 

1.0414 X 1.0207 where 1.0207 is the average annual unit cost increase projected for a 6-month period. 

5/ Column (2) multiplied by column (4), except for fuel. As indicated in Order 97-9-37, we will rely on the 

most recent fuel costs, with no inflation factor. Fuel for the QE 3/31/10 is the most recent available at this time, 

but we anticipate in the final order adding fuel for the QE 6/30/10. 

6/ $1.12768 in preceding column divided by $.399469 in the base period, and $408.29 in the 

preceeding column divided by $191.54 in the base period. 
Order 

Number 

2004-8-26 

2004-8-26 

2004-8-26 

2004-8-26 

2005-9-16 

2006-9-23 

2007-8-26 

2008-9-3 

2009-9-1 

New 

ANOVA 

Regression 

Residual 

Total 

Intercept 

X Variable 1 

Regress ior 

Multiple R 

R Square 

YE 3/31/ 

2001 

2002 

2003 

2004 

2005 

2006 

2007 

2008 

2009 

2010 

df 

1 

8 

9 

Coefficients 

-50.68373 

0.0249449 

1 Statistics 

0.8333965 

0.6945497 

Adj. R Square 0.6563684 

Std. Error 

Observations 

0.053123 

10 

Appendix C 

Linehaul 

Page 1 of 2 

Calculation of the Linehaul Portion of the 10-Year Trend: TOL. LAC. NAC, and Alaska 

$/ATM 

Non-Fuel 

Linehaul 

0.4609 

0.4869 

0.4697 

0.5225 

0.5312 

0.5312 

0.4924 

0.51562 

0.57542 

0.61927 

SS 

0.0513355 

0.0225764 

0.073912 

Std. Error 

11.72948 

0.0058487 

Actual Y 

Natural Log 

$/ATM 

Non-Fuel 

Linehaul Predicted Y 

-0.774574 

-0.719697 

-0.755661 

-0.649130 

-0.632617 

-0.632617 

-0.708464 

-0.662385 

-0.552655 

-0.479214 

MS 

0.0513355 

0.0028221 

tStat 

-4.321055 

4.2650722 

-0.768954 

-0.744009 

-0.719064 

-0.694119 

-0.669174 

-0.644229 

-0.619284 

-0.594339 

-0.569394 

-0.544449 

F 

18.190841 

P-value 

0.0025424 

0.0027424 

Residuals 

-0.005620456 

0.024311627 

-0.036597289 

0.044988795 

0.036556878 

0.011611962 

-0.089179954 

-0.068046089 

0.016739143 

0.065235383 

SignificanceF 

0.002742447 

Lower 95% 

-77.73196136 

0.011457904 

EXP(Y) 

0.4634978 

0.4752052 

0.4872082 

0.4995144 

0.5121315 

0.5250672 

0.5383297 

0.5519272 

0.5658681 

0.5801612 

Upper 95% 

-23.6355 

0.0384319 

Predicted 

Annual 

Increase 

2.53% 
Appendix C 

Linehaul 

Page 2 of 2 

n AH 

20 

-0.45 -

BO -0.50 -

2 

S2 

5 -0.55 -

(0 z 

1 -0.60 -

1 -0.65 .. 

'E 

= -0.70 -

-0.75 -

1 

01 

r 

-0.80 J 

Nonfuel Linehaul, Unit Cost per RTM, Actual vs. Predicted 

1 1 1 1 1 1 f ) ( 

2002 2003 2004 2005 2006 2007 2008 2009 2010 

• 

y = 0.0249X - 50.684 

R^ = 0.6945 •^' ^ 

Jiiik 

^^"""' ^ • Y 

-j.^^ ^ • Predicted Y 

^ JIIK ^ Linear (Predicted Y) 

^ • 

Years Ended March 31, 2001, through 2010 
Order 

Number 

2004-8-26 

2004-8-26 

2004-8-26 

2004-8-26 

2005-9-16 

2006-9-23 

2007-8-26 

2008-9-3 

2009-9-1 

New 

ANOVA 

Regression 

Residual 

Total 

Intercept 

X Variable 1 

Calculation 

YE 3/31 

2001 

2002 

2003 

2004 

2005 

2006 

2007 

2008 

2009 

2010 

df 

I 

8 

9 

Coefficients 

-75.57235 

0.0405686 

Appendix C 

Terminal 

Page 1 of 2 

of the Terminal Portion of the 10-Year Trend: TOL. LAC. NAC, and Alaska 

] 

$/Ton Enp. 

Terminal 

$281.17 

$278.34 

$299.92 

$302.64 

$304.91 

$318.30 

$368.53 

$363.29 

$386.29 

$384.09 

SS 

0.1357792 

0.0110535 

0.1468327 

Std Error 

8.2073204 

0.0040924 

Actual Y 

Matural Log 

$/Ton Enp. 

Terminal Predicted Y 

5.638959 

5.628843 

5.703516 

5.712544 

5.720017 

5.762994 

5.909522 

5.895201 

5.956588 

5.950877 

MS 

0.1357792 

0.0013817 

tStat 

-9.20792 

9.9131426 

5.6053476 

5.6459161 

5.6864847 

5.7270533 

5.7676218 

5.8081904 

5.8487589 

5.8893275 

5.9298961 

5.9704646 

F 

98.270397 

P-value 

1.566E-05 

9.059E-06 

Residuals 

0.033611436 

-0.017073127 

0.017031309 

-0.014509255 

-0.047604818 

-0.045196382 

0.060763055 

0.005873491 

0.026691927 

-0.019587636 

Significance F 

9.05908E-06 

Lower 95% 

-94.49846303 

0.031131468 

EXP(Y) 

271.8764 

283.1328 

294.8553 

307.0631 

319.7763 

333.0159 

346.8037 

361.1623 

376.1154 

391.6876 

Uoper 95% 

-56.64623 

0.0500057 

Annual 

Increase 

4.14% 

Regression Statistics 

Multiple R 0.9616238 

R Square 0.9247203 

Adj. R Square 0.9153104 

Std Error 0.0371711 

Observations 10 
Appendix C 

Terminal 

Page 2 of 2 

6.00 -

5.95 -

M 5.90 -

Q 

"5 

3 5.85 -

z 

• o 

c 5.80 

§ 5.75 -

tt 5.70 -

5 

= 5.65 -

5.60 -

c ^.C 

20 

Terminal, Unit Cost per Ton Enplaned, Actual vs. Predicted 

•/T 

y = 0.0406X - 75.572 W ^ 

R^ = 0.9247 y ^ 

X 

J^ 

J " • 

y * 

*y^ 

" ^ 

1 1 • • • 1 1 t "" 1 • •• i 1 1 1 

00 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 

Years Ended March 31, 2001, thru March 31, 2009 

• Y 

• Predicted Y 
Appendix D-1 

Operating Expenses, Alaska Airlines, Northern Air Cargo, Lynden Air Cargo, and Tatonduk Outfitters, Ltd. 

Intra-Alaska Class Service Mail Rates-Year Ended March 31, 2010 

Domestic Fuel 

Dom. N-Fuel 

Total 

Intra-AK Skd. B.Hrs. 

Intra-AK Adj. Fuel B.Hrs. 

Domestic Total 

Intra-AK Fuel 

Intra-AK N-Fuel 

Intra-AK Skd. ATMs 

$/ATM, Fuel 

$/ATM, N-Fuel 

Intra-AK Mail RTMs 

RTM % of Total 

$/ATM, Fuel 

$/ATM, N-Fuel 

Account '#6900 

System Tons Enpl. 

Intra-AK Skd. Svc. 

Intra-AK Skd. Svc. Tons 

$/Ton Enplaned 

AK Mail Tons Enplaned 

Mail Tons % of Total 

Wtd. $/Ton Enplaned 

Total 

39,073 

114,606 

$60,578,447 

$114,544,800 

187,492,053 

$0.323099 

$0.610931 

22,853,334 

99.99% 

$0.382290 

$0.619270 

Total 

54,348 

100.01% 3/ 

$384.09 

Alaska Aid ines 

(AS) 

#617 

B-737-400 

$137,427,664 

$297,041,586 

$434,469,250 

25,460 

— 

91,813 

$38,109,073 

$82,370,457 

132,676,400 

$0.287233 

$0.620837 

6,501,984 

28.45% 

$0.08172 

$0.17663 

AS 

$52,295,038 

148,607 

$351.90 

14,026 

25.81% 

$90.83 

Lynden 

Air Cargo 

(LAC) 

#556 

Hercules 

$6,610,272 

$35,449,897 

$42,060,169 

1,696 

3,266 

9,371 

$3,432,646 

$6,415,860 

10,899,372 

$0.314940 

$0.588645 

3,985,608 

17.44% 

$0.05493 

$0.10266 

LACl/ 

$5,511,039 

12,937 

$425.99 

9,635 

17.73% 

$75.53 

Northern 

Air Cargo 

NAC 

#620 

737-200 

$10,809,082 

$13,843,630 

$24,652,712 

5,298 

— 

5,822 

$9,836,227 

$12,597,656 

26,305,663 

$0.373921 

$0.478895 

5,677,223 

24.84% 

$0.09288 

$0.11896 

NAC 

$15,578,850 

32,292 

$14,470,210 

29,994 

$482.44 

14,325 

26.36% 

$127.17 

Tatonduk Outfitters, Ltd, 

(TOL) 

#218 

DC-6 

$10,276,347 

$13,199,859 

$23,476,206 

5,549 

— 

6,492 

$8,783,649 

$11,282,504 

16,711,793 

$0.525596 

$0.675122 

6,308,294 

27.60% 

$0.14506 

$0.18633 

TOL 

$9,880,965 

32,854 

$7,344,708 

24,421 

$300.75 

16,362 21 

30.11% 

$90.56 

(TOL) 

#461 

Brasilia 

$431,656 

$1,945,030 

$2,376,686 

1,070 

— 

1,108 

$416,852 

$1,878,323 

898,825 

$0.463774 

$2.089754 

380,225 

1.66% 

$0.00770 

$0.03469 

1/ Lynden developed its intra-Alaska costs by direcdy assigning all terminal costs, and then allocating the remainder 

on intra-Alaska and system departures. 

2/ Mainline aircraft only: 16,610 enplaned tons, allocated between mainline and bush on scheduled payload: 

16,610 * 49,117 mainline payload tons -^ 49,861 sytem payload tons. 

3/ Total may not sum to 100% due to rounding. 
Appendix D-2 

Intra-Alaska Mainline Mail Costs - Quarter Ended March 31, 2010, Order 2010-6-24 

Alaska Lynden Northern 

Airlines Air Air Cargo 

AS LAC NAC 

Tatonduk Outfitters Ltd. 

TOLGrand #617 #556 #620 #150 #218 #461 

Total 737-400 Hercules B-737-200 C-46 DC-6 Brasilia 

Fuel 1/ $40,946,588 $33,531,588 $1,890,717 $2,942,742 $98,315 $2,383,499 $99,727 

Intra-AK Skd. Elk. Hrs. 2/ 

Total Block Hours 2/ 

Intra-AK Fuel Expense 

Intra-AK Skd. ATMs 2/ 

Unit Cost/ATM, Fuel 

Intra-AK Mail RTMs 2/ 

RTM Percent of Total 

Wtd. Cost/ATM, Fuel 

9,423 

23,792 

$16,709,931 

44,161,398 

$0.378383 

5,397,040 

100.00% 

$0.46978 

6,185 

20,133 

$10,301,141 

31,602,080 

$0.325964 

1,542,938 

28.59% 

$0.09319 

383 

476 

$1,521,312 

2,481,859 

$0.612973 

922,547 

17.09% 

$0,10476 

1,141 

1,379 

$2,434,858 

5,675,268 

$0.429030 

1,294,658 

23.99% 

$0.10292 

143 

157 

$89,548 

151,063 

$0.592786 

45,082 

0.84% 

$0.00498 

1,333 

1,402 

$2,266,194 

4,045,686 

$0.560151 

1,511,450 

28.01% 

$0.15690 

238 

245 

$96,878 

205,442 

$0.471559 

80,365 

1.49% 

$0.00703 

1/ Per Form 41 reports, except for Lynden, whose fuel expense is from a special internal report of Lynden. 

2/ Per the T-100 Segment report and carrier submissions. Northern Air, Lynden, and Everts data are for their system. 

For Alaska Airlines, it is for the carrier's domestic operation only, i.e., the carrier's Latin American Division is excluded. 

Lynden is per the carrier's special report. 
Appendix E 

Exclude Operations Below the One Percent Threshold. YE 3-31-10 

Carrier 

Alaska Airlines Inc. 

Tatonduk Outfitters 

Northern Air Cargo Inc. 

Lynden Air Cargo Airlines 

Tatonduk Outfitters 

Tatonduk Outfitters 

Era Aviation 

Alaska Airlines Inc. 

Alaska Airlines Inc. 

Alaska Airlines Inc. 

Grand Total 

Uniquecarriername 

Tatonduk Outfitters 

Northern Air Cargo Inc. 

Alaska Airlines Inc. 

Lynden Air Cargo Airlines 

Era Aviation 

Grand Total 

Aircrafttvpe 

#617, B-737-400 

#218, DC-6 

#620, B-737-200 

#556, Hercules 

#461, Brasilia 

#150, C-46 

#483, Dash 8 

#614,B-737-800 

#612,B-737-700 

#634, B-737-900 

Intra-Alaska Skd. 

RTMs of Mail 

6,501,984 

6,308,294 

5,677,223 

3,985,608 

380,225 

207,981 

66,484 

59,774 

26,451 

6.972 

23,239,637 

Intra-Alaska Skd. 

Mail Tons Enplaned 

16,610 

14,325 

14,318 

9,635 

334 

55,222 

Percent 

27.98% 

27.14% 

24.43% 

17.15% 

L64% 

0.89% 

0.29% 

0.26% 

0.11% 

0.03% 

100.00% 

Percent 

30.08% 

25.94% 

25.93% 

17.45% 

0.60% 

100.00% 

Cumulative 

Percent 

27.98% 

55.12% 

79.55% 

96.70% 

98.34% 

99.23% 

99.52% 

99.78% 

99.89% 

99.92% 

Cumulative 

Percent 

30.08% 

56.02% 

81.95% 

99.40% 

100.00% 

Note: Totals for Tatonduk and Era Mail Tons Enplaned include some bush operations. 

In Appendix D, Page 1, we have adjusted Tatonduk's total to exclude its bush enplanements. 

No such adjustment necessary for Era, whose total does not reach the I percent threshhold in any event.