20251223Exhibit 10.pdf

Intermountain Gas Company
Lateral Summary Tables — Other Scenarios
2025 — 2030
INTEPAOUNTAIN `�'
GAS COMPANY
A Subsidiary of MDU Resources Group, Inc.
In the Community to Serve'
Exhibit No. 10

Lateral Capacity Summary By Year,Weather:Normal,Growth:Low
2025 Base Year(Dth)
%of Existing Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 60,486 90,400 67% 18,900 109,300 55%
SUN VALLEY 13,826 20,000 69% 4,750 24,750 56%
CANYON COUNTY 64,978 103,200 63% 35,800 139,000 47%
STATE STREET 40,652 82,000 50% - 82,000 50%
CENTRALADA 39,125 74,500 53% 12,500 87,000 45%
ALL OTHER 215,305
2026 Year 2(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 61,060 109,300 56% 109,300 56%
SUN VALLEY 13,938 24,750 56% 24,750 56%
CANYON COUNTY 66,740 139,000 48% 139,000 48%
STATE STREET 41,308 82,000 50% 82,000 5006
CENTRAL ADA 39,771 87,000 46% 87,000 46%
ALL OTHER 228,255
2027 Year 3(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 61,676 109,300 56% 109,300 56%
SUN VALLEY 14,031 24,750 57% 24,750 57%
CANYON COUNTY 67,971 139,000 49% - 139,000 49%
STATE STREET 41,667 82,000 51%1 13,000 1 95,000 44%
CENTRALADA 40,115 87,000 46% 87,000 46%
ALL OTHER 228,927
2028P14,122
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 57% 109,300 57%
SUN VALLEY 24,750 57% 24,750 57%
CANYON COUNTY 68,960 139,000 50% 139,000 50%
STATE STREET 42,075 95,000 44% 95,000 4406
CENTRAL ADA 40,509 1 87,000 47%1 87,000 47%
ALL OTHER 1 230,366
2029P19,06S
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 57% 109,300 57%SUN VALLEY 24,750 61% 24,750 61%
CANYON COUNTY 69,895 139,000 50% 139,000 50%
STATE STREET 42,596 95,000 45% 95,000 45%
CENTRALADA 41,018 87,000 47% 87,000 47%
ALL OTHER 231,191
2030 Year 6(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 63,224 109,300 58% 2,900 112,200 56%
SUN VALLEY 15,158 24,750 61% - 24,750 61%
CANYON COUNTY 70,826 139,000 51% 139,000 51%
STATE STREET 43,113 95,000 45% 95,000 4506
CENTRALADA 41,523 87,000 48% 87,000 48%
ALL OTHER 232,049
2

Lateral Capacity Summary By Year,Weather:Normal,Growth:Base
2025 Base Year(Dth)
%of Existing Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 60,486 90,400 67% 18,900 109,300 55%
SUN VALLEY 13,826 20,000 69% 4,750 24,750 56%
CANYON COUNTY 64,978 103,200 63% 35,800 139,000 47%
STATE STREET 40,652 82,000 50% - 82,000 50%
CENTRAL ADA 39,125 74,500 53% 12,500 87,000 45%
ALL OTHER 215,305
2026 Year 2(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 61,298 109,300 56% 109,300 56%
SUN VALLEY 13,977 24,750 56% 24,750 56%
CANYON COUNTY 66,939 139,000 48% 139,000 48%
STATE STREET 41,451 82,000 51% 82,000 51%
CENTRAL ADA 39,911 87,000 46% 87,000 46%
ALL OTHER 228,730
2027M14,124
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 57% 109,300 57%
SUN VALLEY 24,750 57% 24,750 57%
CANYON COUNTY 68,450 139,000 49% - 139,000 49%
STATE STREET 42,007 1 82,000 51%1 13,000 95,000 44%
CENTRAL ADA 40,450 1 87,000 1 46% - 87,000 46%
ALL OTHER 230,059
2028 Year 4;14271
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Total PExisting Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 58% 109,300 580
SUN VALLEY 24,750 58% 24,750 58%
CANYON COUNTY 69,734 139,000 50% 139,000 50%
STATE STREET 42,617 1 95,000 1 45%1 1 95,000 45%
CENTRAL ADA 41,043 1 87,000 1 47%1 1 87,000 47%
ALL OTHER 232,164
2029 Year 5(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 63,969 109,300 59% 109,300 59%
SUN VALLEY 15,270 24,750 62% 24,750 62%
CANYON COUNTY 70,978 139,000 51% 139,000 51%
STATE STREET 43,349 95,000 46% 95,000 46%
CENTRAL ADA 41,759 87,000 48% 87,000 48%
ALL OTHER 233,675
2030 Year 6;15419
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Total PExisting Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 59% 2,900 112,200 58%
SUN VALLEY 24,750 62% - 24,750 62%
CANYON COUNTY 72,231 139,000 52% 139,000 52%
STATE STREET 44,081 1 95,000 1 46%1 1 95,000 4606
CENTRAL ADA 42,476 1 87,000 1 49%1 1 87,000 49%
ALL OTHER 235,231
3

Lateral Capacity Summary By Year,Weather:Normal,Growth:High
2025 Base Year(Dth)
%of Existing Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 60,486 90,400 67% 18,900 109,300 55%
SUN VALLEY 13,826 20,000 69% 4,750 24,750 56%
CANYON COUNTY 64,978 103,200 63% 35,800 139,000 47%
STATE STREET 40,652 82,000 50% - 82,000 50%
CENTRAL ADA 39,125 74,500 53% 12,500 87,000 45%
ALL OTHER 215,305
2026 Year 2(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 61,533 109,300 56% 109,300 56%
SUN VALLEY 14,018 24,750 57% 24,750 57%
CANYON COUNTY 67,136 139,000 48% 139,000 48%
STATE STREET 41,593 82,000 51% 82,000 51%
CENTRAL ADA 40,051 87,000 46% 87,000 46%
ALL OTHER 229,206
2027 Year 3(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 62,796 109,300 57% 109,300 57%
SUN VALLEY 14,219 24,750 57% 24,750 57%
CANYON COUNTY 68,932 139,000 50% - 139,000 50%
STATE STREET 42,348 82,000 52% 13,000 95,000 45%
CENTRAL ADA 40,786 87,000 47% - 87,000 47%
ALL OTHER 231,197
2028 Year 4;14422
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Total PExisting Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 59% 109,300 590
SUN VALLEY 24,750 58% 24,750 58%
CANYON COUNTY 70,518 139,000 51% 139,000 51%
STATE STREET 43,165 1 95,000 1 45%1 1 95,000 45%
CENTRAL ADA 41,582 1 87,000 1 48%1 1 87,000 48%
ALL OTHER 233,991
2029P15,477
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 60% 109,300 600
SUN VALLEY 24,750 63% 24,750 63%
CANYON COUNTY 72,083 139,000 52% 139,000 52%
STATE STREET 44,111 95,000 46% 95,000 46%
CENTRAL ADA 42,510 87,000 49% 87,000 49%
ALL OTHER 236,211
2030 Year 6(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 66,447 109,300 61% 2,900 112,200 59%
SUN VALLEY 15,685 24,750 63% - 24,750 63%
CANYON COUNTY 73,674 139,000 53% 139,000 53%
STATE STREET 45,068 95,000 47% 95,000 4706
CENTRAL ADA 43,448 87,000 50% 87,000 50%
ALL OTHER 238,502
4

Lateral Capacity Summary By Year,Weather:Design,Growth:Low
2025 Base Year(Dth)
%of Existing Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 92,290 90,400 102% 18,900 109,300 84%
SUN VALLEY 22,265 20,000 111% 4,750 24,750 90%
CANYON COUNTY 105,743 103,200 102% 35,800 139,000 76%
STATE STREET 80,265 82,000 98% - 82,000 98%
CENTRAL ADA 77,641 74,500 104% 12,500 87,000 89%
ALL OTHER 301,650
2026 Year 2(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 93,340 109,300 85% 109,300 85%
SUN VALLEY 22,451 24,750 91% 24,750 91%
CANYON COUNTY 108,668 139,000 78% 139,000 78%
STATE STREET 81,539 82,000 99% 82,000 99%
CENTRAL ADA 78,893 87,000 91% 87,000 91%
ALL OTHER 315,378
2027 Year 3(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 94,367 109,300 86% 109,300 86%
SUN VALLEY 22,611 24,750 91% 24,750 91%
CANYON COUNTY 110,933 139,000 80% - 139,000 80%
STATE STREET 82,246 82,000 100% 13,000 95,000 87%
CENTRAL ADA 79,572 87,000 91% - 87,000 91%
ALL OTHER 316,539
2028P22,770
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 87% 109,300 87%
SUN VALLEY 24,750 92% 24,750 92%
CANYON COUNTY 112,896 139,000 81% 139,000 81%
STATE STREET 83,075 1 95,000 1 87%1 95,000 8706
CENTRAL ADA 80,375 1 87,000 1 92%1 1 87,000 92%
ALL OTHER 318,523
2029 Year;23779
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest TotaExisting Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 88% 109,300 88%
SUN VALLEY 24,750 96% 24,750 96%
CANYON COUNTY 114,771 139,000 83% 139,000 83%
STATE STREET 84,126 1 95,000 1 89%1 95,000 89%
CENTRAL ADA 81,403 1 87,000 1 94%1 87,000 94%
ALL OTHER 319,966
2030P23,940
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 89% 2,900 112,200 87%
SUN VALLEY 24,750 97% - 24,750 97%
CANYON COUNTY 116,617 139,000 84% 139,000 84%
STATE STREET 85,155 1 95,000 1 90%1 1 95,000 90%
CENTRAL ADA 82,409 1 87,000 1 95%1 1 87,000 95%
ALL OTHER 321,416
5

Lateral Capacity Summary By Year,Weather:Design,Growth:High
2025 Base Year(Dth)
%of Existing Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 92,290 90,400 102% 18,900 109,300 84%
SUN VALLEY 22,265 20,000 111% 4,750 24,750 90%
CANYON COUNTY 105,743 103,200 102% 35,800 139,000 76%
STATE STREET 80,265 82,000 98% - 82,000 98%
CENTRAL ADA 77,641 74,500 104% 12,500 87,000 89%
ALL OTHER 301,650
2026 Year 2(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 94,224 109,300 86% 109,300 86%
SUN VALLEY 22,595 24,750 91% 24,750 91%
CANYON COUNTY 109,523 139,000 79% 139,000 79%
STATE STREET 82,155 82,000 100%1 82,000 100%
CENTRAL ADA 79,501 87,000 91%1 87,000 91%
ALL OTHER 317,267
2027 Year 3(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 96,410 109,300 88% 109,300 88%
SUN VALLEY 22,940 24,750 93% 24,750 93%
CANYON COUNTY 112,929 139,000 81% - 139,000 81%
STATE STREET 83,660 82,000 102% 13,000 95,000 8806
CENTRAL ADA 80,965 87,000 93% - 87,000 93%
ALL OTHER 320,869
2028 Year 4;23286
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Total PExisting Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 90% 109,300 90%
SUN VALLEY 24,750 94% 24,750 94%
CANYON COUNTY 116,097 139,000 84% 139,000 84%
STATE STREET 85,312 1 95,000 1 90%1 95,000 90%
CENTRAL ADA 82,579 1 87,000 1 95%1 1 87,000 95%
ALL OTHER 325,359
2029P24,499
Planned Capacity Existing+Upgrade %of Existing+
Area ofInterest Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 109,300 92% 109,300 920
SUN VALLEY 24,750 99% 24,750 99%
CANYON COUNTY 119,240 139,000 86% 139,000 86%
STATE STREET 87,219 95,000 92% 95,000 92%
CENTRAL ADA 84,451 87,000 97% 87,000 97%
ALL OTHER 329,381
2030 Year 6(Dth)
Planned Capacity Existing+Upgrade %of Existing+
Area of Interest Total Peak Day Existing Capacity %of Capacity Upgrade Capacity Upgrade Capacity
IDAHO FALLS 102,919 109,300 94% 2,900 112,200 92%
SUN VALLEY 24,845 24,750 100% - 24,750 100%
CANYON COUNTY 122,418 139,000 88% 139,000 88%
STATE STREET 89,133 95,000 94% 95,000 9406
CENTRAL ADA 86,330 87,000 99% 87,000 99%
ALL OTHER 333,479
6