1. Cornudas Capacity Summer MCFFuelDth @1,023 Btu/cf Current 1,861,195 Line 2000 230,000 0 235,290 Total 2,096,485 Cornudas Capacity Winter MCFFuelDth @1,023 Btu/cf Current 1,964,557 Line 2000 230,000 0 235,290 Total2,199,847 Physical Westward Capacity* from Cornudas Adding in Line 2000 Capacity * Assumes peak period Fuel deduction of 4% through Cornudas for existing but no fuel for Line 2000 quantities

2. Window Rock Capacity Summer MCFFuelDth @1,023 Btu/cf Current 2,314,56392,5832,273,086 Window Rock Capacity Winter MCFFuelDth @1,023 Btu/cf Current 2,444,66097,7862,400,852 Physical Westward Capacity* from Window Rock * Assumes peak period Fuel deduction of 4% through Window Rock

3. Total Westward System Capacity Summer Dth @1,023 Btu/cf Window Rock 2,273,086 Cornudas2,096,485 4,369,571 Total Westward System Capacity Winter Dth @1,023 Btu/cf Window Rock 2,400,852 Cornudas2,199,847 4,600,699 Total Westward Capacity* With Line 2000 Allocable to Westward Shippers * Assumes peak period Fuel deduction of 4% through both of Window Rock and Cornudas of current flow and no fuel deduct on Line 2000

4. Total Westward Mainline Physical Capacity Summer Dth @1,023 Btu/cf 4,369,571 Total Westward Mainline Contract Capacity Summer Dth @1,023 Btu/cf 4,638,267 Qty: -268,696 Capacity Shortfall Pct: 5.8% Capacity Shortfall Allocation Pct: 94.2% Total Westward Mainline Physical Capacity Winter Dth @1,023 Btu/cf4,600,699 Total Westward Mainline Contract Capacity Winter Dth @1,023 Btu/cf4,942,596 Qty: - 341,897 Capacity Shortfall Pct: 6.9% Capacity Shortfall Allocation Pct: 93.1% Total Westward Capacity Shortfall With Line 2000 Allocable to Westward Shippers

5. Cornudas Only Receipt Right Contracts SummerDth/day 673,392 (a) Application of Shortfall Pct Summer x 94.2% (b) Result of Applying Shortfall % 634,382 (c) =a x b Cornudas Capacity Summer 2,096,485 (d) Summer Cornudas Capacity Available to System-wide Receipts Shippers 1,462,103 (e) = d - c Cornudas Only Receipt Right Contracts Winter Dth/day 673,392 (f) Application of Shortfall Pct Winter x 93.1% (g) Result of Applying Shortfall % 626,811 (h) = f x g Cornudas Capacity Winter 2,199,847 (i) Winter Cornudas Capacity Available to System-wide Receipts Shippers 1,573,036 (j) = i - h Physical Westward Capacity from Cornudas w/deduction of Single Basin (i.e., non San Juan) Receipt Capacities

6. San Juan Only (FT2) Receipt Right Contracts SummerDth/day 15,252 (a) Application of Shortfall Pct Summer x 94.2% (b) Result of Applying Shortfall % 14,368 (c) =a x b Window Rock Capacity Summer 2,273,086 (d) Summer Window Rock Capacity Available to System-wide Receipts Shippers 2,258,718 (e) = d - c San Juan Only (FT2) Receipt Right Contracts Winter Dth/day 24,825 (f) Application of Shortfall Pct Winter x 93.1% (g) Result of Applying Shortfall % 23,108 (h) = f x g Window Rock Capacity Winter 2,400,852 (i) Winter Window Rock Capacity Available to System-wide Receipts Shippers 2,377,744 (j) = i - h Physical Westward Capacity from San Juan (Window Rock) w/deduction of Single Basin (i.e., FT2) Receipt Capacities

7. Total Westward Mainline Physical Capacity Summer Dth @1,023 Btu/cfPct of Total Cornudas1,462,103 39.3 % Window Rock 2,258,718 60.7 % 3,720,821100.0% Total Westward Mainline Physical Capacity Winter Dth @1,023 Btu/cfPct of Total Cornudas1,573,036 39.8 % Window Rock 2,377,744 60.2 % 3,950,780100.0 % Total Westward Mainline Physical Capacity With Line 2000 After Single Basin Contract Deduction

8. FT Shippers Minimum Basin Entitlement % (Primary Receipt Capacity % of Mainline Capacity) Shippers Summer Primary Receipt Capacity Percentage (North and South) Pct of Total Window Rock (North) 60.7 % Cornudas (South) 39.3 % 100.0% Shippers Winter Primary Receipt Capacity Percentage (North and South) Pct of Total Window Rock (North) 60.2 % Cornudas (South) 39.8 % 100.0 %

9. ~ 60% ~ 40% Total Westward Capacity Mainline Pool Pcts of Mainline Capacity With Line 2000

10. Allocation Methodology Applied to Hypothetical Shippers Converted FR Example Shipper 5 Year Avg. NCP Winter (Study 6a)25,000 (a) Shipper 2000 NCP Winter (Study 5a)30,000 (b) Winter Season Primary Delivery Capacity27,500 (c) = (a+b)/2 Shipper 5 Year Avg. NCP Summer (Study 6b)10,000 (d) Shipper 2000 NCP Summer (Study 5b)12,000 (e) Summer Season Primary Delivery Capacity11,000 (f) =(d+e)/2 Winter Season Primary Delivery Capacity 27,500 (c) Winter Shortfall Percentage 92.4% (g) Winter Season Mainline Capacity 25,410 (h) = (c x g) Summer Season Primary Delivery Capacity 11,000 (i) Summer Shortfall Percentage 93.1% (j) Summer Season Mainline Capacity 10,285 (k) = (i x j) Winter Season Mainline25,410 (h) Winter Season San Juan Primary Receipt % 60.2% (l) Winter Season San Juan Primary Receipt Capacity15,293 (m) =(h x l) Winter Season Cornudas Primary Receipt % 39.8% (n) Winter Season Cornudas Primary Receipt Capacity10,117 (o) = (h x n) Summer Season Mainline10,241 (k) Summer Season San Juan Primary Receipt % 60.7% (p) Summer Season San Juan Primary Receipt Capacity 6,217 (q) =(k x p) Summer Season Cornudas Primary Receipt % 39.3% (r) Summer Season Cornudas Primary Receipt Capacity 4,024 (s) = (k x r) CD Shipper Example 25,000 (a) 25,000 (b) 25,000 (c) = (a+b)/2 25,000 (d) 25,000 (e) 25,000 (f) =(d+e)/2 25,000 (c) 92.4% (g) 23,100 (h) = (c x g) 25,000 (i) 93.1% (j) 23,275 (k) = (i x j) 23,100 (h) 60.2% (l) 13,903 (m) =(h x l) 39.8% (n) 9,197 (o) = (h x n) 23,275 (k) 60.7% (p) 14,129 (q) =(k x p) 39.3% (r) 9,146 (s) = (k x r)

11. Reservation Charge Credit Methodology Applied to Hypothetical Shippers Converted FR Example Shipper Primary Delivery Capacity 259,455 (a) Shipper Dollars per Month Reservation Charge $2,757,888 (b) Months in Season 6 (c) Dollars in Season $ 16,547,328 (d) =(b x c) Days in Season 181 (e) Dollars per Day $ 91,421.70 (f) = (d/e) One for one unit Reservation Credit $0.34966 (g) = (f/a) Hypothetical Unprovided Qty 1,500 (h) Dollars Credited to Shipper $ 524.48 (i) = (g x h) FR example is summer CD quantity for Winter Peaker CD Shipper Example 25,000 (a) $ 270,750 (b) 6 (c) $ 1,624,500 (d) =(b x c) 181 (e) $ 8,975.13 (f) = (d/e) $ 0.35901 (g) = (f/a) 1,500 (h) $ 538.51 (i) = (g x h)