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					                                      Nebraska Statewide Integration Study - Key Facts Dec 16, 2009
                                      Current Situation       Scenario 1    Scenario 3-w/overlay Scenario 4-w/overlay Sources and Assumptions
                                           2007             10%-Composite     20%-Composite        40%-Composite
NEB WIND GENERATION
Nameplate Wind Gen (MW)               72 ('07), 152 ('09)       1,249             2,488                 4,727       Table 1 of main body, 12-09-09
Average (for all) Size Modeled                                   250               311                   430        Table 1 of main body, 12-09-09
(MW)
Cap Accred by farm (SPP rule,                               0.06% - 1.94%     0.06% - 1.94%         0.06%-2.41%     Tables 20, 21, 22 of Section 8.2, 12-09-09,
MW)                                                                                                                 min of July/Aug
Cap Accred applied to Aggregate                                2.94%              4.75%                6.55%        Table 23 of Section 8.2, 12-09-09, min of
(SPP rule, MW)                                                                                                      July/Aug
Wind Capacity Factor (annual, %)          30% ('07)            41.5%              40.8%                41.1%        Average of three years
Wind Generation (GWh)                     187 ('07)             4,537              8,886               17,002       Average of three years
Number of Wind Turbines (at 3.0       46('07), 73 ('09)          417                830                1,576                3 MW size assumption (from LR83
MW each)                               variable sizes                                                                          paper, Topic 4, page 4, June 09)
Land Use Under Lease in Acres (at                              124,900           248,800              472,700             100 acres lease per MW assumption
100 acres per MW each)                                                                                                         (from LR83 paper, Topic 4, page
                                                                                                                               4, June 09)
Land Use Disturbed in Acres (at                                 6,657             13,261               25,195            5.33 acres disturbed per MW
5.33 acres per MW)                                                                                                             assumption (from LR83 paper,
                                                                                                                               Topic 4, page 4, June 09)
Annual Purchase Cost of Wind                                    $227               $444                $850              $50 per MWh of wind generation for
Generation in Millions of 2009$ (at                                                                                            purchase cost in 2009$
$50/MWh)
Approx Investment Cost for Wind                                $2,623             $5,225              $9,927           $2,100 per kW assumption for 2009 (from
Generation Developer in Millions of                                                                                           LR83 paper, Topic 4, page 4, June
2009$                                                                                                                         09)
NEB TRANSMISSION
New Transmission Miles                                          179               1,052                1,299
Annual Cost for New Transmission                                $15               $174                 $195
in Millions of 2009$
Investment Cost for New                                         $193              $2,181              $2,435
Transmission in Millions of 2009$




                                                                            Page 1 of 18
                                     Nebraska Statewide Integration Study - Key Facts Dec 16, 2009
                                     Current Situation     Scenario 1        Scenario 3-w/overlay Scenario 4-w/overlay Sources and Assumptions
                                          2007           10%-Composite         20%-Composite        40%-Composite
NEB LOAD AND GENERATION
Estimated Coincident Peak                       6,080                7,489                   7,489               7,489
Demand (MW)
Estimated Annual Load Factor                    57.3%                60.1%                   60.1%               60.1%
Nebraska Load + Est. Losses                    30,505               39,405                  39,405              39,405 2007 from page 30, main body, 12-09-09,
(GWh)                                                                                                                  7.4% losses. 2018 from page 50 of main
                                                                                                                       body, 12-09-09
Estimated Neb Share of SPP Load                 12.1%                14.9%                   14.9%               14.9% Rest of SPP sales for 2007 are estimated beginning with 2005
                                                                                                                          values from DOE eGrid generation data at
+ Losses                                                                                                                  www.epa.gov/cleanenergy/documents/egridzips/eGRID2007V1_1_
                                                                                                                          year05_SummaryTables.pdf, then using an estimated scale factor
                                                                                                                          up to 2007. 2018 data from page 50 of main body.
Nebraska Generation (GWh)                      36,394               49,085                  53,570              58,308
  Coal                                         21,646               29,336                  29,699              27,285
  Nuclear                                      11,042                9,683                   9,684               9,682
  Gas/Oil                                       1,146                3,277                   3,046               2,086
  Hydro & Other Renewable                       2,373                2,253                   2,253               2,253
  Wind Renewable                                  187                4,536                   8,889              17,001
Net Exports (GWh)                               5,888                9,680                  14,165              18,903
NEB CO2 EMISSIONS
Neb CO2 Emissions in millions of                             32.62                  32.90               29.97
short-tons
Neb CO2 Emissions Reductions in                              -0.32                  -0.60                2.33                    32.30 Reference Emissions for Existing
millions of short-tons (NOT                                                                                                            Wind
counting external to Neb)
SPP INTEGRATION COSTS (2006 PATTERN - 2009$/MWh)
Shaped Proxy                                                 1.39             1.52 (Scenario 3)          1.75
                                                                              1.45 (Scenario 2)
Sub-period Block Proxy - Native                              1.92             3.11 (Scenario 2)          NA
Sub-period Block Proxy - Implied                             5.41             9.26 (Scenario 2)          NA
(including "exported" shape costs)
                                                                                                                           above normalized cost applied to Neb Wind
NEB INTEGRATION COSTS (2006 PATTERN - millions of 2009$)                                                                   MWh
Shaped Proxy                                                 6.31             13.51 (Scenario 3)        29.75
                                                                              12.88 (Scenario 2)
Sub-period Block Proxy - Native                              8.71             27.64 (Scenario 2)         NA
Sub-period Block Proxy - Implied                             24.55            82.28 (Scenario 2)         NA
(including "exported" shape costs)




                                                                             Page 2 of 18
                                     Nebraska Statewide Integration Study - Key Facts Dec 16, 2009
                                     Current Situation      Scenario 1       Scenario 3-w/overlay Scenario 4-w/overlay Sources and Assumptions
                                          2007            10%-Composite        20%-Composite        40%-Composite
NEB HOURLY RAMPING-LOAD (MW, 2006 pattern, 20%)
Annual Maximum Up-Ramp                                                         643 (hour 7, Feb)                         Figure 116, section 8.2
Highest Monthly Average Up-Ramp                                                430 (hour 7, Jan)                         Figure 115, section 8.2
Annual Maximum Down-Ramp                                                       -718 (hour 1, Oct)                        Figure 137, section 8.2
Highest Monthly Avg Down-Ramp                                                 -477 (hour 24, Aug)                        Figure 136, section 8.2
NEB HOURLY RAMPING-LOAD NET WIND (MW, 2006 pattern, 20%)
Annual Maximum Up-Ramp                                                        1,113 (hour 8, Jan)                        Figure 116, section 8.2
Highest Monthly Average Up-Ramp                                                501 (hour 9, July)                        Figure 115, section 8.2
Annual Maximum Down-Ramp                                                     -1,008 (hour 23, Sep)                       Figure 137, section 8.2
Highest Monthly Avg Down-Ramp                                                 -494 (hour 24, Aug)                        Figure 136, section 8.2
SPP REGULATING RESERVES WITH NEBRASKA (HOURLY MAXIMUM MW, 2006 PROFILE)
Load Only Requirements                                         528                   528                    528          Table 59, main body
Load and Wind Together                                         1152                  1800                   3257         Table 59, main body
Requirements
Incremental Requirement from                                   852                   1542                   3034         Table 59, main body
Wind (Coincidental - not the delta
of the above numbers)
SPP REGULATING RESERVES WITH NEBRASKA (AVERAGE MW, 2006 PROFILE)
Load Only Requirements                                          295                  295                    295          Table 59, main body
Load and Wind Together                                          794                  1291                   2337         Table 59, main body
Requirements
Incremental Requirement from                                    499                  996                    2042         Table 59, main body
Wind
SPP REVENUE REQUIREMENT (TOTAL COST) IN AVERAGE RATE TERMS
 Estimated Average Retail Rate             7.43                10.55                10.77                  11.05
(nominal cents/kWh)                    (2007 cents)         (2018 cents)         (2018 cents)           (2018 cents)
KEY STUDY PARAMETERS
Study was focused in year 2018 to allow significant development of wind generation, transmission and load.
Wind patterns used were 2004, 2005, 2006 and matched with utility load patterns for those years.
Wind penetration levels ranged from 10% to 40% measured by native load customer energy requirements.
Only other generation added was Whelan 2, ADM, and a conversion of CT plant to CC.
New Transmission added included Knoll - Axtell, plus local reinforcements for injections, plus overlay in Scenarios 3 and 4
Models look at variability of load and wind and uncertainty of the wind, covering Nebraska, down to north Texas, up into Canada, and east to Pennsylvania and
Tennessee.
Base assumptions for the 2018 results above are $25/short ton of CO2 emission (2018$), REC price at zero, cap-and-trade CO2 regulation (with some emissions
allowed up to cap).
Sensitivity cases run include various proxy resources, CO2 cost, REC price, market structure, hurdle rate, existing wind, Neb overlay at 345kV, and WAPA mitigation.




                                                                              Page 3 of 18
          Nebraska's Energy Sources - 2007 - 36,394GWh            Nebraska's Energy Sources - 2018 (10%) - 49,085 GWh
                                         Scenario
                              Scenario 3-w/overlay4-w/overlay
                       Hydro &
                       Other             Wind                              Hydro &              Wind
                     Renewable      Renewable                              Other             Renewable
                       6.5%            0.5%                              Renewable             9.2%
                                                                           4.6%
                  Gas/Oil
                  3.1%
                                                                        Gas/Oil
                                                                        6.7%
               Nuclear                           Coal                                                    Coal
              30.3%                            59.5%                    Nuclear                        59.8%
                                                                       19.7%




     Nebraska's Energy Sources - 2018 (20%) - 53,570 GWh        Nebraska's Energy Sources - 2018 (40%) - 58,308 GWh

                                       Wind
                                   Renewable                                      Wind
                Hydro &              16.6%                                    Renewable
                Other                                                           29.2%
              Renewable
                4.2%                                                 Hydro &                               Coal
               Gas/Oil                           Coal                Other                               46.8%
Neb CO2        5.7%                            55.4%               Renewable
                                                                     3.9%
                Nuclear                                                  Gas/Oil
               18.1%                                                    3.6%
                                                                                        Nuclear
                                                                                       16.6%
     Nebraska's Generation Use - 2007 - 36,394            Nebraska's Generation Use - 2018 (10%) -
                                   Scenario
                        Scenario 3-w/overlay4-w/overlay
                      GWh                                              49,085 GWh

               Net Neb                                            Net Neb
               Exports                                            Exports
                16.2%                                              19.7%




                                       Neb Load +                                       Neb Load +
                                         Losses                                           Losses
                                         83.8%                                            80.3%




      Nebraska's Generation Use - 2018 (20%) -            Nebraska's Generation Use - 2018 (40%) -
                   53,570 GWh                                          58,308 GWh

                                                                  Net Neb
             Net Neb                                              Exports
             Exports                                               32.4%
              26.4%


Neb CO2                                                                                   Neb Load +
                                        Neb Load +                                          Losses
                                          Losses                                            67.6%
                                          73.6%
                                      Current Situation      Scenario 1        Scenario 3-w/overlay
                                         2008????         10%-2004 pattern      20%-2004 pattern


Nameplate Wind Gen (MW)                                        1,249                  2,488
Average (for all) Size Modeled                                  250                    311
(MW)
Cap Accred by farm (SPP rule,                                   NA                     NA
MW)
Cap Accred applied to Aggregate                                 NA                     NA
(SPP rule, MW)
Wind Capacity Factor (annual, %)                               39.5%                 38.9%
Wind Generation (GWh)                                          4,326                  8,478
Number of Wind Turbines (at 3.0                                 417                    830
MW each)
Land Use Under Lease in Acres (at                             124,900                248,800
100 acres per MW each)

Land Use Disturbed in Acres (at                                6,657                 13,261
5.33 acres per MW)

Annual Purchase Cost of Wind                                   $216                   $424
Generation in Millions of 2009$ (at
$50/MWh)
Approx Investment Cost for Wind
Generation Developer in Millions of
2009$                                                          2,623                 5,225
New Transmission Miles                                          179                  1,052
Annual Cost for New Transmission                                $15                  $174
in Millions of 2009$
Investment Cost for New                                        $193                  $2,181
Transmission in Millions of 2009$
Nebraska Load + Est. Losses                    30,505                 39,405                  39,405
Nebraska Generation (GWh)                      36,394                 48,860                  53,150
   Coal                                        21,646                 29,352                  29,732
   Nuclear                                     11,042                  9,683                   9,684
   Gas/Oil                                      1,146                  3,272                   3,042
   Hydro & Other Renewable                      2,373                  2,253                   2,253
   Wind Renewable                                 187                  4,300                   8,440
Net Exports (GWh)                               5,888                  9,455                  13,745
CO2 Emissions in millions of short-
tons                                                           32.59                  32.89
Neb CO2 Emissions Reductions in
millions of short-tons (NOT
counting external to Neb)                                      -0.29                  -0.59
Scenario 4-w/overlay Sources and Assumptions
 40%-2004 pattern


      4,727             Table 1 of main body, 12-09-09
       430              Table 1 of main body, 12-09-09
       NA

        NA

      39.4%             Calculated
      16,317            Tables 9, 10, 11 of Section 8.2, 12-09-09
       1,576                     3 MW size assumption (from LR83
                                   paper, Topic 4, page 4, June 09)
     472,700                  100 acres lease per MW assumption
                                   (from LR83 paper, Topic 4, page
                                   4, June 09)
      25,195                 5.33 acres distrurbed per MW
                                   assumption (from LR83 paper,
                                   Topic 4, page 4, June 09)
      $816                   $50 per MWh of wind generation for
                                   purchase cost in 2009$



      9,927                  2100 per kW assumption for 2009 (from LR83 paper, Topic 4, page 4, June 09)
      1,299
      $195

      $2,435

               39,405   2007 from page 30, main body, 12-09-09, 7.4% losses. 2018 from page 50 of main body, 12-09-09
               57,750                                                    48860      53150     57750
               27,463   Tables 67, 69, 70            red need fixing
                9,682   Tables 67, 69, 70            red need fixing
                2,122   Tables 67, 69, 70            red need fixing
                2,253   Tables 67, 69, 70            red need fixing
               16,230   Tables 67, 69, 70            red need fixing
               18,345

      30.12


       2.18                 32.30 Reference Emissions for Existing Wind
in body, 12-09-09
                                      Current Situation      Scenario 1        Scenario 3-w/overlay
                                         2008????         10%-2005 pattern      20%-2005 pattern


Nameplate Wind Gen (MW)                                        1,249                  2,488
Average (for all) Size Modeled                                  250                    311
(MW)
Cap Accred by farm (SPP rule,                                   NA                     NA
MW)
Cap Accred applied to Aggregate                                 NA                     NA
(SPP rule, MW)
Wind Capacity Factor (annual, %)                               41.6%                 41.0%
Wind Generation (GWh)                                          4,549                  8,945
Number of Wind Turbines (at 3.0                                 417                    830
MW each)
Land Use Under Lease in Acres (at                             124,900                248,800
100 acres per MW each)

Land Use Disturbed in Acres (at                                6,657                 13,261
5.33 acres per MW)

Annual Purchase Cost of Wind                                   $227                   $447
Generation in Millions of 2009$ (at
$50/MWh)
Approx Investment Cost for Wind
Generation Developer in Millions of
2009$                                                          2,623                 5,225
New Transmission Miles                                          179                  1,052
Annual Cost for New Transmission                                $15                  $174
in Millions of 2009$
Investment Cost for New                                        $193                  $2,181
Transmission in Millions of 2009$
Nebraska Load + Est. Losses                    30,505                 39,405                  39,405
Nebraska Generation (GWh)                      36,394                 49,140                  53,654
   Coal                                        21,646                 29,373                  29,712
   Nuclear                                     11,042                  9,684                   9,684
   Gas/Oil                                      1,146                  3,272                   3,042
   Hydro & Other Renewable                      2,373                  2,253                   2,253
   Wind Renewable                                 187                  4,559                   8,964
Net Exports (GWh)                               5,888                  9,735                  14,249
CO2 Emissions in millions of short-
tons                                                           32.68                  32.94
Neb CO2 Emissions Reductions in
millions of short-tons (NOT
counting external to Neb)                                      -0.38                  -0.64
Scenario 4-w/overlay Sources and Assumptions
 40%-2005 pattern


      4,727             Table 1 of main body, 12-09-09
       430              Table 1 of main body, 12-09-09
       NA

        NA

      41.0%             Calculated
      16,992            Tables 9, 10, 11 of Section 8.2, 12-09-09
       1,576                     3 MW size assumption (from LR83
                                   paper, Topic 4, page 4, June 09)
     472,700                  100 acres lease per MW assumption
                                   (from LR83 paper, Topic 4, page
                                   4, June 09)
      25,195                 5.33 acres distrurbed per MW
                                   assumption (from LR83 paper,
                                   Topic 4, page 4, June 09)
      $850                   $50 per MWh of wind generation for
                                   purchase cost in 2009$



      9,927                  2100 per kW assumption for 2009 (from LR83 paper, Topic 4, page 4, June 09)
      1,299
      $195

      $2,435

               39,405   2007 from page 30, main body, 12-09-09, 7.4% losses. 2018 from page 50 of main body, 12-09-09
               58,369
               27,283   Tables 71, 73, 74
                9,683   Tables 71, 73, 74
                2,122   Tables 71, 73, 74
                2,253   Tables 71, 73, 74
               17,028   Tables 71, 73, 74
               18,964

        30


       2.30                 32.30 Reference Emissions for Existing Wind
in body, 12-09-09
                                      Current Situation      Scenario 1        Scenario 3-w/overlay
                                         2008????         10%-2006 pattern      20%-2006 pattern


Nameplate Wind Gen (MW)                                        1,249                  2,488
Average (for all) Size Modeled                                  250                    311
(MW)
Cap Accred by farm (SPP rule,                                   NA                     NA
MW)
Cap Accred applied to Aggregate                                 NA                     NA
(SPP rule, MW)
Wind Capacity Factor (annual, %)                               43.3%                 42.4%
Wind Generation (GWh)                                          4,736                  9,235
Number of Wind Turbines (at 3.0                                 417                    830
MW each)
Land Use Under Lease in Acres (at                             124,900                248,800
100 acres per MW each)

Land Use Disturbed in Acres (at                                6,657                 13,261
5.33 acres per MW)

Annual Purchase Cost of Wind                                   $237                   $462
Generation in Millions of 2009$ (at
$50/MWh)
Approx Investment Cost for Wind
Generation Developer in Millions of
2009$                                                          2,623                 5,225
New Transmission Miles                                          179                  1,052
Annual Cost for New Transmission                                $15                  $174
in Millions of 2009$
Investment Cost for New                                        $193                  $2,181
Transmission in Millions of 2009$
Nebraska Load + Est. Losses                    30,505                 39,405                  39,405
Nebraska Generation (GWh)                      36,394                 49,253                  53,906
   Coal                                        21,646                 29,283                  29,653
   Nuclear                                     11,042                  9,683                   9,684
   Gas/Oil                                      1,146                  3,286                   3,053
   Hydro & Other Renewable                      2,373                  2,253                   2,253
   Wind Renewable                                 187                  4,750                   9,264
Net Exports (GWh)                               5,888                  9,848                  14,501
CO2 Emissions in millions of short-
tons                                                           32.59                  32.88
Neb CO2 Emissions Reductions in
millions of short-tons (NOT
counting external to Neb)                                      -0.29                  -0.58
Scenario 4-w/overlay Sources and Assumptions
 40%-2006 pattern


      4,727             Table 1 of main body, 12-09-09
       430              Table 1 of main body, 12-09-09
       NA

        NA

      42.7%             Calculated
      17,696            Tables 9, 10, 11 of Section 8.2, 12-09-09
       1,576                     3 MW size assumption (from LR83
                                   paper, Topic 4, page 4, June 09)
     472,700                  100 acres lease per MW assumption
                                   (from LR83 paper, Topic 4, page
                                   4, June 09)
      25,195                 5.33 acres distrurbed per MW
                                   assumption (from LR83 paper,
                                   Topic 4, page 4, June 09)
      $885                   $50 per MWh of wind generation for
                                   purchase cost in 2009$



      9,927                  2100 per kW assumption for 2009 (from LR83 paper, Topic 4, page 4, June 09)
      1,299
      $195

      $2,435

               39,405   2007 from page 30, main body, 12-09-09, 7.4% losses. 2018 from page 50 of main body, 12-09-09
               58,807
               27,111   Tables 75, 77, 78
                9,682   Tables 75, 77, 78
                2,015   Tables 75, 77, 78
                2,253   Tables 75, 77, 78
               17,747   Tables 75, 77, 78
               19,402

      29.78


       2.52                 32.30 Reference Emissions for Existing Wind
in body, 12-09-09
               NPA-NREL Wind Integration Study
               Estimation of Overlay Miles
              765kV Base Overlay                                                  345kV Neb Only
Involving Nebraska     Rough Est Miles             Nebraska Portion      (in 20% sensitivity substitutes for Neb 765kV)
GNTLM765 KNOLL765             240                        130                                   Rough Est Miles
GNTLM765 CHERY765             140                        140           Axtell345     Gntlmn345          150
RAUN765       CHERY765        270                        270           Gntlmn345     Chery345           140
COOPR765 RAUN765              160                        160           Chery345      Hskns345           210
COOPR765 IATAN765             100                         40           Hskns345      FtCtClhn345        110
                  involving Neb-->   910                 740                                involving Neb-->   610
Not involving Neb                                                           10%        20% with    40% with
WICHI765      COMAN765        120              -----------765kV---------
WICHI765      WOFCK765        120              Neb 765kV miles-overlay            0          740            740
SWISS765 WOFCK765              50              Neb Annual CC 09M$               $0        $132            $132   8% of wind generation cost
SEMIN765 L.E.S765             110              Neb Investment 09M$              $0      $1,654          $1,654 2.235
SEMIN765 MUSKO765             120              ----other lower voltage
L.E.S765      STLIN765        150              Local Trans (line & sub) - Neb 115kV/345kV lines
STLIN765      MOORL765         90                      miles (composite)       139          272           519       0.9 million per mile -composite
SWISS765 IATAN765              70                       Annual 09M$         $11.34      $22.22         $42.50       5% 100% / 8%
WOFCK765 LACYG765              60                       Investment 09M$    $141.78     $277.69        $531.30     12.50
LACYG765 MUSKO765             210              Substations-overlay
SPRVL765 KNOLL765              80                       Annual 09M$             $0          $16            $16      12% of overlay line cost
SPRVL765 COMAN765              50                       Investment 09M$         $0        $198            $198      12% of overlay line cost
SPRVL765 FINNY765              80              Axtell-Knoll 345kV
HCHLD765 FINNY765             100                       miles                    40           40             40
HCHLD765 MOORL765             130                       Annual 09M$            3.63         3.63           3.63      8%
TUCO 765      STLIN765        180                       Investment 09M$       45.32       45.32           45.32    1.133
MOORL765 COMAN765              70                      sub-annual 09$          0.44         0.44           0.44      8%
FRANK765 LACYG765             150                       sub-investment 09$     5.44         5.44           5.44     12%
FTSMT765 MUSKO765              80                                              179       1,052           1,299    TOTAL Miles
                                   2020        rest of SPP                     $15        $174            $195    TOTAL Annual Cost in 09M$
                             2930 2930         SPP incl Neb                   $193      $2,181          $2,435    TOTAL Investment Cost in 09M$

345kV incremental part of Base Overlay
(if any-not including lines in the 10% and 20% w/o overlay cases)
Involving Nebraska             Rough Est Miles
NONE                               0
                                          0 involving Neb
Not involving Neb
Tuco345       Potter345           100
PleasHill345 MariDelta345         130
                                          230 rest of SPP
                                  230     230 SPP incl Neb


                                                             ee14b8fd-6ab4-4fc5-b20b-9461f0730880.xls Page 15
                                                                                                                   Net Generation by State, Type of Producer and Energy Source



                                  State Historical Tables for 2007
                                     Released: January 29, 2009
                                     Next Update: October 2009
       DOE-EIA data source is http://www.eia.doe.gov/cneaf/electricity/epa/generation_state.xls
                                                                                                                                                                                                               Alternative Chart for Website

                                                                                              GENERATION                 Combining gas Combining gas   DOE Data Base----------
YEAR STATE               TYPE OF PRODUCER                       ENERGY SOURCE                                   % of
                                                                                             (Megawatthours)                 and oil   and oil         NOT USED AS IS
                                                                                                                total     (percentage) (GWh)                                                                   Nebraska's Energy Sources 2007    USA 2007 USA 2007                          USA 2007
2007     NE               Total Electric Power Industry                              Coal          19,629,911     60.5%      60.5%       19,630 Coal                                                           Coal             59.5%      59.5%    48.6%    48.6% 1+12+13       Coal      2,016,455,584    1
2007     NE               Total Electric Power Industry                         Petroleum              35,767      0.1%       3.5%        1,146 Gas/Oil                                                        Diesel            0.1%       0.1%     1.6%     1.6%     2      Petroleum       65,738,978    2
2007     NE               Total Electric Power Industry                       Natural Gas           1,110,020      3.4%      34.0%       11,042 Nuclear                                                        Gas               3.1%       3.0%    21.9%    21.9%    3+4    Natural Gas     896,589,791    3
2007     NE               Total Electric Power Industry                      Other Gases                    0      0.0%       1.1%          347 Conventional Hydro                                             Nuclear          30.3%      30.3%    19.4%    19.4%     5     Other Gases      13,453,354    4
2007     NE               Total Electric Power Industry                           Nuclear          11,041,532     34.0%       0.9%          278 Renewable                                                      Hydro Renew       6.4%       6.4%     6.0%     6.0%     6       Nuclear       806,424,753    5
2007     NE               Total Electric Power Industry         Hydroelectric Conventional            347,444      1.1%     100.0%       32,443 TOTAL                                                          Wind Renew        0.5%       0.5%     0.8%     0.8%     7                     247,509,974
                                                                                                                                                                                                                                                                      Hydroelectric Conventional            6
2007     NE               Total Electric Power Industry                             Wind              216,765      0.7%                                                                                        Other Renew       0.1%       0.2%     1.7%     1.7% 8+9+10+11    Wind          34,449,927    7
2007     NE               Total Electric Power Industry                    Other Biomass               61,259      0.2% 2007 Nebraska Electric Utility Generation by Fuel Source in GWh and Percent of Total   TOTAL           100.0%     100.0%   100.0%   100.0% Solar Thermal and Photovoltaic 611,793   8
2007     NE               Total Electric Power Industry                              Total         32,442,698                                                                                                                                                      Wood and Wood Derived Fuels39,014,024    9
2007     NE           Electric Generators, Electric Utilities                        Coal          19,611,849                                                                                                                                                                Geothermal       14,637,213    10
2007     NE           Electric Generators, Electric Utilities                   Petroleum              35,552              (US DOE-EIA Data - 2007 and Nebraska Utility                                                                                                     Other Biomass     16,524,554    11
2007     NE           Electric Generators, Electric Utilities                 Natural Gas           1,103,962                         Data) - 36,394 GWh                                                                                                                   Pumped Storage      -6,896,352   12
2007     NE           Electric Generators, Electric Utilities                Other Gases                    0                                                                                                                                                                   Other         12,231,131    13
2007     NE           Electric Generators, Electric Utilities                     Nuclear          11,041,532                                                                                                               Nebraska's Energy Sources 2007                      Total      4,156,744,724
2007     NE           Electric Generators, Electric Utilities   Hydroelectric Conventional            347,444                                                WAPA-Ext LT                                                              Wind Renew
2007     NE           Electric Generators, Electric Utilities                       Wind              216,765                                                Hydro, 1,972,
                                                                                                                                          Neb Hydro, 347,
                                                                                                                                                                 5%
                                                                                                                                                                                                                            Hydro Renew 0.5%           Other Renew
2007     NE           Electric Generators, Electric Utilities              Other Biomass               46,184                                  1%                                                                                                         0.2%
                                                                                                                       Gas/Oil, 1,146 ,                                Renewable, 240,                                         6.4%
2007     NE           Electric Generators, Electric Utilities                        Total         32,403,289               3%                                              1%
2007     NE        Combined Heat and Power, Electric Power                    Natural Gas               1,684
2007     NE        Combined Heat and Power, Electric Power                 Other Biomass                2,837                                                                                                               Nuclear
2007     NE        Combined Heat and Power, Electric Power                           Total              4,521                                                                                                               30.3%
2007     NE       Combined Heat and Power, Commercial Power                     Petroleum                 215          Nuclear, 11042 ,                                                                                                                     Coal
2007     NE       Combined Heat and Power, Commercial Power                   Natural Gas               4,374               30%                                                         Coal, 19,630 ,                                                     59.5%
2007     NE       Combined Heat and Power, Commercial Power                Other Biomass               12,238                                                                                54%                                  Gas
2007     NE       Combined Heat and Power, Commercial Power                          Total             16,827                                                                                                                     3.0%   Diesel
                                                                                                                                   TS-Ext Firm,                                                                                          0.1%
2007     NE        Combined Heat and Power, Industrial Power                         Coal              18,062                        768, 2%                Coal-Ext LT
2007     NE        Combined Heat and Power, Industrial Power                         Total             18,062                                               Purch, 1,248,
                                                                                                                                                                4%

                              (US DOE-EIA Data - 2007 and Nebraska Utility Data) - 36,394 GWh                         "Adjustment" of DOE data file
                                                                                                                                  2007 GWh                            Source                                               USA's Energy Sources 2007
                                                                                                                      Coal            19,630       53.9%               DOE                    coal
                                                                                                                                                                                                                                   Wind Renew
                                                                                                                      Coal-Ext LT                                                                                                     0.8% Other Renew
                                                                                                (assume same as 2006) Purch              1,248       3.4%           LES, MEAN                 coal                 Hydro Renew
                                                                                                                      TS-Ext                                                                                                                       1.7%
                                                                                                                                                                                                                      6.0%
                                                                                                (assume same as 2006) Firm                 768       2.1%            Tri-State                coal
                                                                                                                      Nuclear          11042       30.3%               DOE                    nuclear                       Nuclear                         Coal
                                                                                                                      Gas/Oil           1,146        3.1%              DOE                    gas/oil                       19.4%                          48.6%
                                                                                                                      Neb Hydro            347       1.0%              DOE                    Hyd&Oth Renew
                                                                                                                      WAPA-Ext
                                                                                                (assume same as 2006) LT Hydro           1,972       5.4%           All Neb Utilities         Hyd&Oth Renew
                                                                                                                                                                                                                                  Gas
                                                                                                                      Renewable            240       0.7%           DOE less 38 JEA est                                                           Diesel
                                                                                                                                                                                                                                 21.9%
                                                                                                                      TOTAL           36,394        100%                                                                                          1.6%

                                                                                                                         2007 Retail Sales                   28,248 GWh
                                                                                                                         % toward RPS in 2007                0.85% not including hydro
                                                                                                                         % toward RPS in 2007                 9.1% including hydro




                                                                                                                                                               Page 16
              NPA-NREL Wind Integration Study
              Rough Estimation of 2018 Retail Revenues for SPP and 2005 Emissions and Associated CAP
DOE-EIA: 2007                from www.eia.doe.gov/cneaf/electricity/epa/epa_sprdshts.htm
                                                                                                                   growth
                              Retail Sales   Retail Revs     Rate       Portion in                                 2007/
               States           (MWh)           (k$)      (cents/kWh)     SPP                2005 retail sales      2005
               SPP Area                                   Neb 2007 rate
               NE               28,248,400      1,775,337         6.28       100%                  26,975,944        1.047      1.047 neb
Calculation of Rest of SPP
Rate for rest AR                47,054,891      3,273,009           6.96                           46,164,923        1.019    0.044
of SPP         KS               40,165,977      2,745,668           6.84     100%                  39,024,283        1.029    0.247
in 2007:       LA               79,566,937      6,678,767           8.39                           77,389,170        1.028    0.093
         7.59 MO                85,532,850      5,614,317           6.56                           80,940,494        1.057    0.137
               NM               22,267,394      1,655,946           7.44                           20,638,951        1.079    0.023
               OK               55,193,200      4,023,049           7.29     100%                  53,707,102        1.028    0.339
               TX              343,828,582     34,772,753          10.11                          334,258,262        1.029    0.151
                                                                                                                              1.033 wtd avg SPP
2018 estimation of Retail Sales                              esc 2.5%/yr 2018 Retail Revenues                    2005 CO2 epa egrid   million          2005
                SPP Area            2018 GWh      2018 GWh      2018 rate $Million $Million                      Emissions #/MWh short tons     MWh-egrid
project all               NE            36,447        36,447          8.25      3,005      3,005 NE                NE      1,605.90      25.27   31,465,430
                Rest of SPP            208,249                                            20,736 Rest of SPP
10% remain*               AR                          8,968           9.13        818            AR                AR        1,229.23        5.02 **
project all               KS                         49,941           8.97      4,479            KS                KS        1,894.92       43.45      45,862,690
21%% remain*              LA                         18,833          11.01      2,074            LA                LA        1,175.49       10.07 **
30% remain*              MO                          26,905           8.61      2,317            MO                MO        1,594.67       19.52 **
5% remain*               NM                           4,484           9.76        438            NM                NM        1,935.90        3.95 **
project all               OK                         68,626           9.56      6,563            OK                OK        1,562.76       54.92      70,283,511
34% remain*               TX                         30,492          13.27      4,046            TX                TX        1,355.41       18.80
      TOTAL SPP incl Neb               244,696      244,696          9.70      23,742     23,742 BEFORE CO2      TOTAL CO2 Emission Est.   181.00 <--- 2005
*ratios for remaining part of rest of SPP are weighted by generation capacities show in PROMOD                                  13.5%      156.57 <--- 2018 cap
                                                                     7.39 (2007 - before carbon)                       **use 0.91 for 2005 busbar from 2018 retail




                                                           ee14b8fd-6ab4-4fc5-b20b-9461f0730880.xls Page 17
   NPA-NREL Wind Study - Estimation of SPP 2018 Free Allowances
Portion based on Retail Sales
   From APPA spreadsheet:
           0.2122 free allowances in 2018 per retail MWh sold in selected 3-year window averaged (based on metric tons)
   From US EPA eGRID 2007 Version 1.1 (http://www.epa.gov/cleanenergy/documents/egridzips/eGRID2007V1_1_year05_SummaryTables.pdf)
      66,012,413 SPP-North 2005 Net generation in MWh
     148,379,742 SPP-South 2005 Net generation in MWh
     214,392,155 SPP 2005 Net Generation in MWh, not including Neb
      16,079,412 Losses from Busbar to Retail meter assume---------->                 7.50%
     198,312,744 Estimated SPP 2005 Retail Sales in MWh, not including Neb
       6,490,953 Estimated growth in SPP Retail Sales in MWh, not incl Neb from 2005 to 2007 at -->                           3.27%
     204,803,697 Estimated SPP 2007 Retail Sales in MWh, not including Nebraska
       28,248,400 Nebraska 2007 Retail Sales in MWh from DOE-EIA
     233,052,097 Estimated TOTAL SPP 2007 Retail Sales in MWh, including Nebraska (use 2007 as proxy for 2006-2008 avg)
      49,447,927 2018 Estimated free allowances to SPP including Neb for the portion based on retail sales (based on metric tons)

Portion based on Emissions in Sales
   From US EPA eGRID 2007 Version 1.1 (http://www.epa.gov/cleanenergy/documents/egridzips/eGRID2007V1_1_year05_SummaryTables.pdf)
                                   Neb                             SPP-North                               SPP-South
                      Coal         Gas         Oil       Coal          Gas           Oil       Coal            Gas          Oil
   share of sales      66.16%       2.55%     0.10%        78.26%        5.94%        1.60%      55.67%         37.41%      0.36%
   sales per type 18,689,706     721,323     28,022 47,785,678 3,629,189           974,663 76,411,895 51,348,030          495,614
   alloc factor         0.3414     0.1460     0.2751        0.3414      0.1460       0.2751       0.3414         0.1460     0.2751
                  2018 Estimated free allowance to SPP including Neb for the portion based on emissions in sales (based on metric tons).
       57,323,405   6,380,488    105,299      7,708 16,313,575        529,793      268,087 26,086,293        7,495,840    136,322

     106,771,332 2018 Estimated TOTAL free allowances to SPP including Nebraska (based on metric tons of CO2)

     117,695,214 2018 Estimated TOTAL free allowances to SPP including Nebraska (based on short tons of CO2)

				
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