Snow Loads for Structural Design in Montana (Revised 2004)

Station
50 Year (MRI)
Depth
Low
Extreme
Snow Load
Log - Pearson Type III
Calculated Snow
Load
High
Extreme
Snow Load
50 Year (MRI)
Depth
Low
Extreme
Snow Load
Lognornal
Calculated Snow
Load
High
Extreme
Snow Load
(inches) (psf) (psf)
(psf) (inches) (psf) (psf)
(psf)
Augusta 26.1 - 0.0 40.8 - 70.5 25.5 - 0.0 39.6 - 69.3
Austin 1 W 24.9 (38.9) 0.0 38.4 (67.0) 68.1 26.3 (35.3) 0.0 41.2 (59.1) 70.8
Barber 31.9 - 40.2 45.4 - 53.8 24.7 - 26.1 31.3 - 39.6
Big Sandy 18.4 (22.7) 15.6 20.8 (27.8) 29.2 20.8 (23.7) 19.5 24.7 (29.5) 33.0
Blackleaf 21.2 (32.5) 0.0 31.8 (53.3) 61.5 23.0 (28.7) 0.0 34.9 (45.7) 64.6
Brady Aznoe 20.9 - 19.5 24.7 - 33.1 18.8 - 16.2 21.4 - 29.7
Browning 47.2 - 43.5 86.1 - 115.8 55.4 - 64.1 106.8 - 136.4
Bynum 4 SSE 16.1 - 0.0 23.1 - 52.7 18.5 - 0.0 27.2 - 56.8
Canyon Creek 19.6 - 0.0 29.0 - 58.7 17.6 - 0.0 25.6 - 55.2
Carter 14 W 12.3 (17.1) 7.0 12.2 (18.8) 20.5 13.4 (16.3) 8.4 13.6 (17.7) 22.0
Cascade 5 S 21.2 - 20.0 25.2 - 33.5 21.5 - 20.6 25.8 - 34.1
Chinook 37.8 - 53.5 58.7 - 67.0 30.6 - 37.6 42.8 - 51.1
Choteau 17.2 - 13.8 19.0 - 27.3 16.2 - 12.3 17.5 - 25.9
Cut Bank Municipal AP 15.8 - 11.8 17.0 - 25.3 15.3 - 11.1 16.3 - 24.6
Deep Creek Pass 2 39.9 - 0.0 71.5 - 126.1 38.8 - 0.0 69.2 - 123.8
Del Bonita 19.8 (27.2) 0.0 29.3 (42.9) 59.0 18.5 (23.2) 0.0 27.1 (35.4) 56.8
Dunkirk 15 NNE 23.4 - 23.8 29.0 - 37.3 26.0 - 28.5 33.7 - 42.0
East Glacier 81.8 - 142.1 184.7 - 214.4 83.8 - 148.5 191.1 - 220.8
Fairfield 27.8 (31.6) 32.0 37.2 (44.7) 45.5 27.3 (30.1) 30.9 36.1 (41.6) 44.4
Flatwillow 4 ENE 27.9 (36.5) 32.2 37.4 (55.7) 45.7 21.8 (28.6) 21.1 26.3 (38.8) 34.6
Fort Assinniboine 27.3 (32.2) 30.9 36.1 (46.0) 44.4 25.3 (28.9) 27.2 32.4 (39.3) 40.7
Fort Benton 22.7 - 22.6 27.8 - 36.1 23.4 - 23.8 29.0 - 37.3
Fort Logan 4 ESE 31.5 - 8.7 51.3 - 81.0 29.9 - 5.6 48.2 - 77.8
Galata 16 SSW 19.9 - 18.0 23.2 - 31.5 22.3 - 22.0 27.2 - 35.5
Geraldine 22.7 - 22.5 27.7 - 36.0 24.5 - 25.7 30.9 - 39.2
Gibson Dam 31.6 - 8.8 51.4 - 81.1 34.8 - 15.5 58.1 - 87.8
Goldbutte 7 N 21.3 (27.3) 20.2 25.4 (36.2) 33.7 17.9 (21.8) 14.9 20.1 (26.2) 28.4
Grass Range 25.3 - 27.2 32.4 - 40.7 26.5 - 29.5 34.7 - 43.0
Great Falls 24.5 - 25.8 31.0 - 39.4 24.1 - 25.0 30.2 - 38.5
Great Falls Int'l Airport 20.5 - 18.9 24.1 - 32.4 20.6 - 19.0 24.2 - 32.5
Harlowton 19.3 - 0.0 28.6 - 58.2 21.3 - 0.0 32.0 - 61.7
Havre City/County AP 32.5 - 41.6 46.8 - 55.1 30.4 - 37.1 42.3 - 50.7
Helena Regional AP 21.3 - 20.3 25.5 - 33.8 22.1 - 21.6 26.8 - 35.1
Highwood 7 NE 25.2 - 27.0 32.2 - 40.5 31.2 - 38.8 44.0 - 52.4
Hobson 39.0 - 24.5 67.1 - 96.8 33.0 - 11.7 54.3 - 84.0
Hogeland 7 WSW 36.2 - 49.8 55.0 - 63.3 34.7 - 46.4 51.6 - 59.9
Holter Dam 16.7 (19.7) 13.1 18.3 (22.8) 26.6 19.5 (21.6) 17.2 22.4 (25.9) 30.8
Joplin 25.5 - 27.7 32.9 - 41.2 23.9 - 24.7 29.9 - 38.2
Kremlin 27.9 - 32.1 37.3 - 45.7 24.7 - 26.2 31.4 - 39.7
Lewistown Municipal AP 32.0 - 9.7 52.3 - 81.9 29.1 - 3.9 46.6 - 76.2
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