Tables 7.2 Ground Snow Loads for Selected Locations

 

Table 7.2-1 Ground Snow Loads, pg, for Alaskan Locations

Location

pg

lb/ft2

kN/m2

Adak

30

1.4

Anchorage

50

2.4

Angoon

70

3.4

Barrow

25

1.2

Barter

35

1.7

Bethel

40

1.9

Big Delta

50

2.4

Cold Bay

25

1.2

Cordova

100

4.8

Fairbanks

60

2.9

Fort Yukon

60

2.9

Galena

60

2.9

Gulkana

70

3.4

Homer

40

1.9

Juneau

60

2.9

Kenai

70

3.4

Kodiak

30

1.4

Kotzebue

60

2.9

McGrath

70

3.4

Nenana

80

3.8

Nome

70

3.4

Palmer

50

2.4

Petersburg

150

7.2

St. Paul

40

1.9

Seward

50

2.4

Shemya

25

1.2

Sitka

50

2.4

Talkeetna

120

5.8

Unalakleet

50

2.4

Valdez

160

7.7

Whittier

300

14.4

Wrangell

60

2.9

Yakutat

150

7.2

 

 

Table 7.2-2 Ground Snow Loads for Selected Locations in Colorado

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

East of I-25 and under 4,500 ft

 

30

<4,500

Alamosa

Alamosa

25

7,540

Aspen

Pitkin

75

7,890

Aurora

Arapahoe

40

5,400

Beaver Creek

Eagle

75

8,080

Boulder

Boulder

40

5,330

Breckenridge

Summit

80

9,600

Brighton

Adams

35

4,980

Buena Vista

Chaffee

35

7,960

Cañon City

Fremont

35

5,350

Castle Rock

Douglas

45

6,220

Central City

Gilpin

85

8,510

Colorado Springs

El Paso

45

6,010

Copper Mountain

Summit

80

9,700

Cortez

Montezuma

30

6,190

Craig

Moffat

30

6,200

Creede

Mineral

65

8,800

Cripple Creek

Teller

70

9,490

Delta

Delta

25

4,960

Denver

Denver

35

5,280

Durango

La Plata

55

6,530

Eagle

Eagle

45

6,600

Estes Park

Larimer

65

7,250

Fairplay

Park

55

9,950

Fort Collins

Larimer

35

5,000

Georgetown

Clear Creek

60

8,520

Glenwood Springs

Garfield

40

5,760

Golden

Jefferson

40

5,670

Granby

Grand

55

7,980

Grand Junction

Mesa

25

4,590

Greeley

Weld

30

4,680

Gunnison

Gunnison

45

7,700

Keystone

Summit

70

9,170

Leadville

Lake

75

10,160

Longmont

Boulder

35

4,980

Meeker

Rio Blanco

40

6,240

Montrose

Montrose

25

5,810

Mount Crested Butte

Gunnison

155

9,900

Pagosa Springs

Archuleta

75

7,130

Paonia

Delta

35

5,680

Pueblo

Pueblo

30

4,690

Rifle

Garfield

40

5,350

Salida

Chaffee

45

7,080

Snowmass Village

Pitkin

90

8,210

Steamboat Springs

Routt

85

6,730

Telluride

San Miguel

75

8,790

Trinidad

Las Animas

45

6,030

Vail

Eagle

90

8,190

Vail Mountain

Eagle

175

10,300

Winter Park

Grand

100

9,050

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. For locations where there is substantial change in altitude over the jurisdiction, the load applies at and below the cited elevation, with a tolerance of 100 ft (30 m).

3. For other locations in Colorado, see Colorado Design Snow Loads 2016, Structural Engineers Association of Colorado, http://seacolorado.org, for ground snow loads.

 

Table 7.2-3 Ground Snow Loads for Selected Locations in Idaho

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

American Falls

Power

24

4,406

Ammon

Bonneville

24

4,718

Blackfoot

Bingham

28

4,498

Bogus Basin Lodge

Ada

137

6,176

Boise

Ada

15

2,681

Brundage Mtn. Lodge

Valley

207

6,038

Buhl

Twin Falls

28

3,769

Burley

Cassia

19

4,159

Caldwell

Canyon

18

2,376

Chubbuck

Bannock

31

4,467

Coeur d’Alene

Kootenai

43

2,189

Eagle

Ada

18

2,566

Emmett

Gem

15

2,363

Fruitland

Payette

18

2,226

Garden City

Ada

15

2,673

Gooding

Gooding

27

3,571

Grangeville

Idaho

18

3,400

Hailey

Blaine

82

5,323

Hayden

Kootenai

62

2,287

Heyburn

Minidoka

19

4,146

Homedale

Owyhee

16

2,231

Idaho Falls

Bonneville

23

4,725

Jerome

Jerome

12

3,764

Ketchum

Blaine

92

5,846

Kimberly

Twin Falls

14

3,924

Kuna

Ada

14

2,693

Lewiston

Nez Perce

10

994

McCall

Valley

157

5,012

Meridian

Ada

16

2,605

Middleton

Canyon

18

2,400

Montpelier

Bear Lake

45

5,986

Moscow

Latah

38

2,580

Mountain Home

Elmore

15

2,563

Nampa

Canyon

15

2,517

Orofino

Clearwater

19

1,017

Payette

Payette

17

2,148

Pocatello

Bannock

31

4,463

Post Falls

Kootenai

72

2,183

Preston

Franklin

79

4,715

Rathdrum

Kootenai

87

2,211

Rexburg

Madison

50

4,863

Rigby

Jefferson

32

4,851

Rupert

Minidoka

18

4,154

St. Anthony

Fremont

37

4,963

Salmon

Lemhi

15

3,943

Sandpoint

Bonner

56

2,101

Schweitzer Basin Lodge

Bonner

243

4,175

Shelley

Bingham

35

4,629

Silver Mt. Lodge

Shoshone

173

5,040

Soda Springs

Caribou

70

5,769

Star

Ada

16

2,471

Sun Valley Mt. Baldy

Blaine

197

9,000

Twin Falls

Twin Falls

15

3,734

Weiser

Washington

17

2,129

Wendell

Gooding

20

3,433

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. For locations where there is substantial change in altitude over the jurisdiction, the load applies at and below the cited elevation, with a tolerance of 100 ft (30 m).

3. For other locations in Idaho, see Al Hatailah, Godfrey, Nielsen and Sack (2015). “Ground Snow Loads for Idaho,” Dept. of Civil Engineering, Univ. of Idaho, Moscow, ID, http://www.lib.uidaho.edu/ digital/idahosnow/ for ground snow load values.

 

Table 7.2-4 Ground Snow Loads for Selected Locations in Montana

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

Anaconda

Deer Lodge

47

5,676

Baker

Fallon

46

2,966

Belgrade

Gallatin

33

4,446

Big Mt. Resort

Flathead

94

4,464

Big Timber

Sweet Grass

37

4,200

Billings

Yellowstone

29

3,242

Boulder

Jefferson

74

4,948

Bozeman

Gallatin

40

4,823

Butte

Silver Bow

36

5,824

Chinook    

Blaine

61

2,418

Choteau    

Teton

19

3,799

Colstrip

Rosebud

18

3,232

Columbia Falls

Flathead

71

3,015

Columbus

Stillwater

41

3,599

Conrad

Pondera

16

3,520

Cut Bank

Glacier

17

3,793

Deer Lodge

Powell

27

4,593

Dillon

Beaverhead

23

5,125

East Helena

Lewis and Clark

28

3,904

Forsyth

Rosebud

20

2,510

Fort Benton

Chouteau

29

2,713

Glasgow    

Valley

24

2,146

Glendive

Dawson

16

2,067

Great Falls

Cascade

32

3,399

Hamilton

Ravalli

43

3,619

Hardin

Big Horn

15

2,904

Havre

Hill

49

2,500

Helena

Lewis and Clark

27

4,013

Kalispell

Flathead

56

2,992

Laurel

Yellowstone

36

3,356

Lewis Hgts.

Fergus

50

3,914

Libby

Lincoln

76

2,198

Livingston

Park

33

4,544

Malta

Phillips

30

2,284

Manhattan

Gallatin

21

4,242

Miles City

Custer

25

2,362

Missoula

Missoula

34

3,245

Plentywood

Sheridan

73

2,080

Polson

Lake

63

2,999

Red Lodge

Carbon

109

5,610

Ronan

Lake

50

3,077

Roundup

Musselshell

21

3,209

Shelby

Toole

28

3,301

Sidney

Richland

27

1,969

Stevensville

Ravalli

48

3,399

Thompson Falls

Sanders

51

2,507

Three Forks

Gallatin

22

4,085

Townsend

Broadwater

11

3,868

W. Yellowstone

Gallatin

122

6,713

Whitefish

Flathead

67

2,999

Wolf Point

Roosevelt

24

2,057

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. For locations where there is substantial change in altitude over the jurisdiction, the load applies at and below the cited elevation, with a tolerance of 100 ft (30 m).

3. For other locations in Montana, see Theisen, G. P., M. J. Keller, J. E. Stephens, F. F. Videon, and J. P. Schilke. (2004). “Snow Loads for Structural Design in Montana,” Dept. of Civil Engineering, Bozeman, MT, http://www.coe.montana.edu/snowload/ for ground snow load values.

 

Table 7.2-5 Ground Snow Loads for Selected Locations in Washington

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

Arlington

Snohomish

17

120

Auburn

King

20

85

Bainbridge Island

Kitsap

15

100

Bellevue

King

20

100

Bellingham

Watcom

15

100

Bonney Lake

Pierce

18

40

Bothell

King

20

90

Bremerton

Kitsap

15

100

Burien

King

16

325

Covington

King

20

85

Crystal Mt.

Pierce

438

4,380

Des Moines

King

18

370

Edmonds

Snohomish

20

350

Ellensburg

Kittitas

34

1,540

Everett

Snohomish

15

110

Federal Way

King

20

85

Issaquah

King

20

100

Kenmore

King

20

90

Kennewick

Benton

15

400

Kent

King

20

50

Kirkland

King

20

180

Lacey

Thurston

15

200

Lake Stevens

Snohomish

15

250

Lakewood

Pierce

15

235

Longview

Cowlitz

18

21

Lynnwood

Snohomish

22

435

Maple Valley

King

23

440

Marysville

Snohomish

16

20

Mercer Island

King

16

320

Mt. Baker

Whatcom

588

4,200

Mt. Spokane

Spokane

151

5,800

Mt. Vernon

Skagit

15

180

Oak Harbor

Island

17

120

Olympia

Thurston

15

130

Pasco

Franklin

15

383

Pullman

Whitman

30

2,400

Puyallup

Pierce

18

40

Redmond

King

20

120

Renton

King

20

15

Richland

Benton

15

359

Sammamish

King

28

520

SeaTac

King

22

440

Seattle

King

20

350

Shoreline

King

22

450

Snoqualmie Pass

Kittitas

433

3,000

Spokane

Spokane

39

2,000

Spokane Valley

Spokane

39

2,000

Stevens Pass

Chelan

400

4,060

Tacoma

Pierce

21

380

Tukwila

King

16

325

Univ. Place

Pierce

20

400

Vancouver

Clark

20

150

Walla Walla

Walla Walla

18

1,000

Wenatchee

Chelan

22

780

White Pass

Yakima

244

4,720

Yakima

Yakima

19

1,066

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. For locations where there is substantial change in altitude over the jurisdiction, the load applies at and below the cited elevation, with a tolerance of 100 ft (30 m).

3. For other locations in Washington, see Structural Engineers Association of Washington (1995). “Snow Load Analysis for Washington,” Seattle, WA, www.seaw.org, for ground snow load values.

 

Table 7.2-6 Ground Snow Loads for Selected Locations in New Mexico

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

Alamogordo

Otero

4

4,300

Albuquerque

Bernalillo

18

5,000

Artesia

Eddy

10

3,400

Aztec

San Juan

10

5,600

Bloomfield

San Juan

9

5,500

Carlsbad

Eddy

10

3,100

Clovis Curry

Curry

10

4,300

Corrales

Sandoval

9

5,000

Deming

Luna

8

4,300

Espanola

Rio Arriba

10

5,600

Farmington

San Juan

10

5,300

Gallup

McKinley

13

6,500

Grants

Cibola

16

6,450

Hobbs

Lea

10

3,600

Jemez

Sandoval

18

6,200

Las Cruces

Dona Ana

9

3,900

Las Vegas

San Miguel

22

6,400

Los Alamos

Los Alamos

30

7,300

Los Lunas

Valencia

6

4,900

Portales

Roosevelt

9

4,000

Red Rock

Grant

4

6,800

Roswell

Chaves

14

3,600

Ruidoso

Lincoln

25

6,700

Santa Fe

Santa Fe

15

7,000

Shiprock

San Juan

9

4,900

Socorro

Socorro

13

4,600

Zuni

McKinley

14

6,300

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. For locations where there is substantial change in altitude over the jurisdiction, the load applies at and below the cited elevation, with a tolerance of 100 ft (30 m).

 3. For other locations in New Mexico, see Maji, A. K. (1999). “Ground Snow Load Database for New Mexico,” Dept. of Civil Engineering, Universityof New Mexico,Albuquerque, NM, http://www.seanm.org/ files/snowload.pdf for ground snow load values.

 

Table 7.2-7 Ground Snow Loads for Selected Locations in Oregon

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

Antelope

Wasco

17

2,840

Ashland

Jackson

13

1,990

Astoria

Clatsop

11

10

Baker City

Baker

17

3,450

Bandon

Coos

0

20

Bend

Deschutes

20

3,660

Black Butte

Deschutes

19

970

Bonneville Dam

Hood River

44

60

Brookings

Curry

1

50

Burns

Harney

20

4,140

Corvallis

Benton

14

230

Crater Lake

Klamath

461

6,470

Crescent Lake

Klamath

154

4,760

Dallas

Polk

20

290

Detroit

Marion

78

1,730

Diamond Lake

Klamath

10

4,160

Enterprise

Wallowa

26

3,280

Eugene

Lane

12

360

Forest Grove

Washington

17

180

Fossil

Wheeler

21

2,650

Government Camp

Clackamas

321

3,980

Grants Pass

Josephine

6

920

Heppner

Morrow

17

1,880

Hood River

Hood River

43

500

John Day

Baker

8

500

Joseph

Wallowa

16

4,020

Klamath Falls

Klamath

23

4,100

La Grande

Union

15

2,750

Lakeview

Lake

47

4,780

Madras

Jefferson

17

2,440

Medford

Jackson

4

1,460

Mitchell

Wheeler

46

3,980

Newport

Lincoln

2

140

North Bend

Coos

2

10

Ontario

Malheur

15

2,140

Parkdale

Hood River

79

1,720

Pendleton

Umatilla

30

1,040

Portland

Multnomah

11

30

Prineville

Crook

15

2,840

Redmond

Deschutes

16

3,060

Roseburg

Douglas

7

420

Salem

Marion

9

200

Santiam Pass

Linn

481

4,750

Seaside

Clatsop

3

10

Sisters

Deschutes

30

3,180

The Dalles

Wasco

24

100

Troutdale

Multnomah

12

30

Vale

Malheur

17

2,240

Vernonia

Columbia

35

840

Zig Zag

Clackamas

70

1,440

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. For locations where there is substantial change in altitude over the jurisdiction, the load applies at and below the cited elevation, with a tolerance of 100 ft (30 m).

3. For other locations in Oregon, see “Snow Load Analysis for Oregon,” 4th Ed., November 2013, Structural Engineers Association of Oregon and the PRISM Climate Group of Oregon State University, http:// snowload.seao.org/lookup.html, for ground snow load values.

 

Table 7.2-8 Ground Snow Loads for Selected Locations in New Hampshire

City/Town

County

Ground Snow Load (lb/ft2)

Elevation (ft)

Amherst

Hillsborough

70

600

Atkinson

Rockingham

55

400

Barrington

Strafford

70

500

Bedford

Hillsborough

70

700

Belmont

Belknap

80

900

Berlin

Coos

100

1,600

Bow

Merrimack

75

800

Claremont

Sullivan

85

1,100

Concord

Merrimack

70

600

Conway

Carroll

95

900

Derry

Rockingham

65

600

Dover

Strafford

60

200

Durham

Strafford

55

150

Epping

Rockingham

55

300

Exeter

Rockingham

50

200

Farmington

Strafford

85

800

Franklin

Merrimack

75

700

Gilford

Belknap

90

1,200

Goffstown

Hillsborough

75

800

Hampstead

Rockingham

55

300

Hampton

Rockingham

50

150

Hanover

Grafton

75

1,300

Hollis

Hillsborough

60

500

Hooksett

Merrimack

70

600

Hudson

Hillsborough

60

400

Keene

Cheshire

70

900

Laconia

Belknap

80

900

Lebanon

Grafton

80

1,200

Litchfield

Hillsborough

60

250

Londonderry

Rockingham

65

500

Manchester

Hillsborough

70

500

Merrimack

Hillsborough

60

400

Milford

Hillsborough

70

600

Nashua

Hillsborough

60

400

Newmarket

Rockingham

50

200

Newport

Sullivan

85

1,200

Pelham

Hillsborough

55

400

Pembroke

Merrimack

70

700

Plaistow

Rockingham

55

300

Plymouth

Grafton

75

900

Portsmouth

Rockingham

50

100

Raymond

Rockingham

60

500

Rochester

Strafford

70

500

Salem

Rockingham

55

300

Seabrook

Rockingham

50

100

Somersworth

Strafford

60

250

Stratham

Rockingham

50

150

Swanzey

Cheshire

65

800

Weare

Hillsborough

80

900

Windham

Rockingham

60

400

Note: To convert lb∕ft2 to kN∕m2, multiply by 0.0479. To convert feet to meters, multiply by 0.3048.

1. Statutory requirements of the Authority Having Jurisdiction are not included in this state ground snow load table.

2. These loads only apply at the elevation listed. For lower elevations, the ground snow load shall be decreased by 2.1 lb/ft2 for every 100 ft of elevation difference (0.32kN/m2 for every 100m of elevation difference). For higher elevation up to an elevation of 2,500ft, the ground snow load shall be increased at the same rate. Ground snow loads calculated for a site-specific elevation different than that listed in the table should be rounded to the nearest 5 lb/ft2 (0.25 kN∕m2)

3. For other locations in New Hampshire, see Tobiasson, W., Buska, J., Greatorex, A., Tirey, J., Fisher, J., and Johnson, S., (2002). “Ground snow loads for New Hampshire.” U.S. Army Corps of Engineers, Engineering Research and Development Center (ERDC), Cold Regions Research and Engineering Laboratory (CRREL) Technical Report ERDL/CRREL TR-02-6. Hanover, NH, http://www.senh.org/public-links or http://www.erdc.usace.army.mil/Locations/ColdRegionsResearchandEngineeringLaboratory/Publications.aspx, for ground snow load values.