Oldest Bridges in Wyoming

The oldest bridge in Wyoming dates to 1908. The table below shows the state's most historic bridges, ranked by year built. Many of these structures have survived well beyond their original design life — click any bridge to see its current condition and inspection history.

How this ranking works

This state list uses the NBI year-built field and links each bridge to its current inspection record. Treat age as a history signal, not a condition score.

Bridge	County	Year Built	Condition	Daily Traffic
US 30 Service Road over Smiths Fork River	Lincoln	1908	Poor	26
Grand Teton Np RD over Snake River	Teton	1911	Fair	1,800
County Road 60 over Ft Laramie Canal	Goshen	1913	Fair	2
SH Cnty RD 2 over North Piney Creek	Sheridan	1914	Fair	32
Cb Cnty RD 660 over North Platte River	Carbon	1915	Poor	69
Cb Cnty RD 680 over Encampment River	Carbon	1915	Poor	71
Cb Cnty RD 3 over Medicine Bow River	Carbon	1915	Poor	59
County Road 90 over Ft Laramie Canal	Goshen	1915	Fair	2
Lone Star Geyser R over Firehole River	Teton	1915	Fair	250
SH Cnty RD 140 over Bnsf Railway	Sheridan	1916	Poor	136
Fr Cnty RD 314 over Big Wind River	Fremont	1920	Poor	40
La Cnty RD 236-1 over Little Horse Creek	Laramie	1920	Fair	29
Ni Cnty RD 9 over Cheyenne River	Niobrara	1920	Poor	3
SH Cnty RD 40 over Wild Horse Creek	Sheridan	1920	Fair	8
SH Cnty RD 149 over Piney Creek	Sheridan	1920	Fair	241
Little Sandy Rec S over Little Sandy Creek	Sweetwater	1920	Fair	25
Fr Cnty RD 238 over Big Wind River	Fremont	1921	Poor	81
Fr Cnty RD 497 over Haymaker Draw	Fremont	1921	Poor	140
Wyo 319 over Middle Fork Bear Creek	Platte	1922	Fair	182
Wyo 319 over North Fork Bear Creek	Platte	1922	Fair	182
Go Cnty RD 33f over Interstate Canal	Goshen	1924	Fair	155
Na Cnty RD 110 over Cloud Creek	Natrona	1924	Fair	1,070
Hayden Arch Road over Shoshone River	Park	1924	Poor	100
Fr Cnty RD 298 over Wind River	Fremont	1925	Poor	26
Go Cnty RD 35d over Fort Laramie Canal	Goshen	1925	Poor	52
Pa Cnty RD 4dt over Wood River	Park	1925	Fair	178
Fountain Freight R over Firehole River	Teton	1925	Poor	10
Bh Cnty RD 229 over Antelope Creek	Big Horn	1926	Fair	343
Bh Cnty RD 72 over Shoshone River	Big Horn	1926	Poor	119
Co Cnty RD 36 over Laprele Creek	Converse	1926	Fair	20
US 14 over Little Tongue River	Sheridan	1926	Fair	738
Lake Side Drive over Guernsey Dam Spillway	Platte	1927	Fair	100
I-25 Service Road over Spring Creek	Platte	1927	Fair	58
Texas Trail over North Platte River	Carbon	1929	Poor	50
Na Cnty RD 412 over Hogback Draw	Natrona	1929	Poor	165
Na Cnty RD 412 over Mowrey Draw	Natrona	1929	Fair	165
Wyo 435 over Tensleep Creek	Washakie	1929	Poor	164
Wa Cnty RD R34 over Spillway Hanover Canal	Washakie	1929	Poor	119
We Cnty RD 1a over Bnsf Railway	Weston	1929	Poor	136
Bh Cnty RD L55 over Big Horn River	Big Horn	1930	Poor	88
I-80 Service Road over North Platte River	Carbon	1930	Poor	782
Cb Cnty RD 203 over North Platte River	Carbon	1930	Poor	97
Jo Cnty RD 78 over Red Wall Draw	Johnson	1930	Fair	13
Pa Cnty RD 6nx over Rattlesnake Creek	Park	1930	Fair	65
10th Street over Canal No 2	Platte	1930	Poor	138
SH Cnty RD 77 over Little Goose Creek	Sheridan	1930	Fair	116
Pl Cnty RD 87 over Canal No 1	Platte	1931	Fair	138
Ui Cnty RD 233 over Blacks Fork River	Uinta	1931	Poor	42
Ui Cnty RD 233 over Blacks Fork River	Uinta	1931	Fair	42
Fr Cnty RD 298 over Dry Creek	Fremont	1932	Fair	26
Fr Cnty RD 523 over Twin Creek	Fremont	1932	Poor	8
I-25 Service Road over South Fork Powder River	Johnson	1932	Fair	79
Grand Loop Road over Lava Creek	Teton	1932	Fair	1,807
We Cnty RD 1a over Beaver Creek	Weston	1933	Poor	136
We Cnty RD 1a over Unnamed Draw	Weston	1933	Poor	136
Wyo 130 over North Brush Creek	Carbon	1934	Fair	733
La Cnty RD 210-2 over Uprr	Laramie	1934	Poor	640
Northeast Entrance over Soda Butte Creek	Park	1934	Fair	1,982
Northeast Entrance over Soda Butte Creek	Park	1934	Fair	1,982
Northeast Entrance over Pebble Creek	Park	1934	Fair	1,982
Grand Loop Road over Otter Creek	Teton	1934	Poor	1,807
South Entrance Roa over Crawfish Creek	Teton	1934	Fair	3,952
Culbertson Avenue over Big Horn River	Washakie	1934	Poor	1,045
3rd Street over Big Wind River	Fremont	1935	Fair	274
Wyo 196 over North Fork Powder River	Johnson	1935	Fair	310
La Cnty RD 124-2 over Lodgepole Creek	Laramie	1935	Poor	481
Ames Avenue over Unnamed Draw	Laramie	1935	Fair	7,540
US 30 over Smiths Fork River	Lincoln	1935	Fair	2,518
US 30 over Spring Creek	Lincoln	1935	Fair	2,518
US 30 Service Road over Spring Creek	Lincoln	1935	Fair	26
I-25 Service Road over Bnsf Railway	Platte	1935	Poor	87
Wyo 319 over Baxter Draw	Platte	1935	Good	208
SH Cnty RD 98 over Wolf Creek	Sheridan	1935	Fair	23
U.s. Route 89 over Arizona Creek	Teton	1935	Fair	5,000
Grand Loop Road over Nez Perce Creek	Teton	1935	Fair	1,807
Grand Loop Road over Tower Creek	Teton	1935	Fair	1,807
Firehole Lake Driv over Thermal Area Drainage	Teton	1935	Fair	1,500
Firehole Lake Driv over Thermal Area Drainage	Teton	1935	Poor	1,500
Firehole Lake Driv over Thermal Area Drainage	Teton	1935	Poor	1,500
Wa Cnty RD 580a over Nowood River	Washakie	1935	Fair	16
Wa Cnty RD 580 over East Fork Sand Creek	Washakie	1935	Poor	4
Northeast Entrance over Dry Creek	Park	1936	Fair	1,982
Northeast Entrance over Dry Creek	Park	1936	Fair	1,982
Northeast Entrance over Dry Creek	Park	1936	Fair	1,982
Wyo 319 over Dry Wash	Platte	1936	Good	417
Grand Loop Road over Gibbon River	Teton	1936	Fair	1,807
East Entrance Road over Yellowstone River	Teton	1936	Fair	1,286
Fdr over Little Popo Agie	Fremont	1937	Good	50
Clendenning Street over Horse Creek	Fremont	1937	Fair	450
US 20 over Owl Creek	Hot Springs	1937	Fair	1,934
Pa Cnty RD L9a over Bitter Creek	Park	1937	Poor	1,493
Wa Cnty RD 580a over Big Cottonwood Creek	Washakie	1937	Poor	16
Bull Lake Road over Bull Lake Dam Spillway	Fremont	1938	Poor	5
US 89 over Flat Creek	Teton	1938	Poor	15,780
Grand Loop Road over Gardner River	Park	1939	Fair	4,350
US 87 Bus over Little Goose Creek	Sheridan	1939	Fair	1,679
Bh Cnty RD 229 over Elk Creek	Big Horn	1940	Poor	343
Wyo 789 over Muddy Creek	Carbon	1940	Good	1,817
Cb Cnty RD 109 over Mill Creek	Carbon	1940	Poor	2
Fdr 843 over Beaver Creek	Crook	1940	Good	100
Na Cnty RD 102 over Badwater Creek	Natrona	1940	Poor	22
Fdr over N.fork Shoshone	Park	1940	Good	25
SB Cnty RD 175 over New Fork River	Sublette	1940	Poor	40
2nd Street over Dead Horse Canyon Creek	Sweetwater	1940	Fair	5,361
SW Cnty RD 1199 over Greasewood Creek	Sweetwater	1940	Fair	259
Ui Cnty RD 222 over Uinta Ditch No. 3	Uinta	1940	Poor	73
Wyo 59 over Burlington Supply Ditch	Campbell	1941	Fair	14,340
Bear River Drive over Bear River	Uinta	1941	Poor	2,961
US 30 over First Sand Creek	Carbon	1942	Fair	458
Wyo 192 over North Fork Powder River	Johnson	1942	Fair	229
Wyo 215 over Unnamed Draw	Laramie	1942	Good	648
Wyo 374 over Unnamed Draw	Sweetwater	1942	Fair	2,401
Wyo 374 over Grease Wood Draw	Sweetwater	1942	Poor	2,401
Wyo 374 over Unnamed Draw	Sweetwater	1942	Fair	1,126
Fsr 33 over Crazy Woman Creek	Johnson	1945	Fair	62
Gf1 (ltl Horn Acc) over Little Big Horn River	Sheridan	1945	Fair	116
US 30 over Floodwater Creek	Albany	1946	Poor	1,530
I-80 Ebl over Unnamed Draw	Albany	1946	Fair	7,222
I-80 Wbl over Unnamed Draw	Albany	1946	Fair	7,563
I-80 Ebl And Wbl over Unnamed Draw	Albany	1946	Fair	7,222
Co Cnty RD 1a over Bnsf Railway	Converse	1946	Fair	105
I-25 Service Road over Horse Creek	Laramie	1946	Fair	44
I-25 Service Road over Little Bear Creek	Laramie	1946	Fair	47
US 87 Bus over Little Goose Creek	Sheridan	1946	Fair	1,679
US 191 over Hoback River	Sublette	1946	Fair	2,509
Wyo 353 over Unnamed Draw	Sublette	1946	Fair	741
Wyo 374 over Unnamed Draw	Sweetwater	1946	Fair	3,127
Wyo 374 over Blacks Fork River	Sweetwater	1946	Fair	1,126
Wyo 374 over Uprr	Sweetwater	1946	Fair	3,065
Wyo 35 over Sage Creek	Big Horn	1947	Fair	2,086
Wyo 193 over Little Piney Creek	Johnson	1947	Good	611
Wyo 215 over Unnamed Draw	Laramie	1947	Fair	648
Fdr 17 over Shell Creek	Big Horn	1948	Good	45
Wyo 31 over Alkali Creek	Big Horn	1948	Fair	216
Wyo 31 over Medicine Lodge Creek	Big Horn	1948	Fair	216
Wyo 70 over Cottonwood Creek	Carbon	1948	Fair	621
Cb Cnty RD 291 over Austin Creek	Carbon	1948	Fair	123
Wyo 116 N over S Fork Sundance Creek	Crook	1948	Fair	556
Wyo 116 N over Sundance Creek	Crook	1948	Fair	556
Wyo 116 N over N Fork Sundance Creek	Crook	1948	Fair	556
Access Road over Boysen Dam Spillway	Fremont	1948	Fair	5
US 20 over Sand Draw	Hot Springs	1948	Fair	1,662
Wyo 89 over Uprr	Lincoln	1948	Fair	1,302
I-25 Service Road over Unnamed Draw	Natrona	1948	Good	85
I-25 Service Road over Rock Creek	Platte	1948	Poor	153
Wyo 433 over Dry Draw	Washakie	1948	Good	1,387
Wyo 433 over Dry Draw	Washakie	1948	Good	774
Wyo 130 over North Platte River	Carbon	1949	Fair	2,093
Wyo 319 over Indian Creek	Converse	1949	Fair	299
Fdr over Wind River	Fremont	1949	Good	50
Fdr over Warm Springs Creek	Fremont	1949	Good	50
US 20 over Coal Draw	Hot Springs	1949	Fair	1,777
US 310 over Sage Creek	Park	1949	Fair	1,632
Wyo 295 over Garland Canal	Park	1949	Fair	3,431
Wyo 314 over Richeau Creek	Platte	1949	Fair	124
Wyo 314 over Chugwater Creek	Platte	1949	Poor	96
Wyo 22 over Fish Creek	Teton	1949	Poor	10,222
I-80 Bus over Smiths Fork River	Uinta	1949	Fair	782
Bh Cnty RD L31 over Shell Creek	Big Horn	1950	Poor	31
Bh Cnty RD L32h over Red Gulch	Big Horn	1950	Poor	83
Bh Cnty RD R4 over Sidon Canal	Big Horn	1950	Fair	119
US 30 over ST Marys Creek	Carbon	1950	Fair	657
US 30 over Uprr	Carbon	1950	Fair	458
Cb Cnty RD 97 over Little Medicine Bow Rvr	Carbon	1950	Fair	24
Cb Cnty RD 608 over Cow Creek	Carbon	1950	Poor	67
US 30 over Unnamed Draw	Carbon	1950	Fair	458
Wyo 319 over North Platte River	Converse	1950	Fair	299
Co Cnty RD 53 over S Fork Walker Creek	Converse	1950	Fair	773
Fr Cnty RD 480 over Pilot Canal	Fremont	1950	Poor	265
Fr Cnty RD 442 over Hornecker Creek	Fremont	1950	Fair	80
Fr Cnty RD 442 over Middle Fork Popo Agie	Fremont	1950	Poor	80
Go Cnty RD 78a over Gid Canal Flood Control	Goshen	1950	Fair	69
Wyo 171 over Spring Gulch	Hot Springs	1950	Good	87
Jo Cnty RD 204a over Crazy Woman Creek	Johnson	1950	Poor	98
Jo Cnty RD 212 over French Creek	Johnson	1950	Fair	391
Wyo 214 over Unnamed Draw	Laramie	1950	Good	1,183
La Cnty RD 207-1 over Crow Creek	Laramie	1950	Fair	67
Wyo 214 over Unnamed Draw	Laramie	1950	Fair	1,183
I-25 Service Road over Horse Creek	Natrona	1950	Fair	85
I-25 Service Road over Sheep Creek	Natrona	1950	Good	85
8th Street over Canal No 2	Platte	1950	Fair	138
15th Street over Canal No 2	Platte	1950	Fair	225
14th Street over Canal No 2	Platte	1950	Fair	138
12th Street over Canal No 2	Platte	1950	Fair	138
Water Street over Canal No 2	Platte	1950	Fair	138
SH Cnty RD 84 over Dutch Creek	Sheridan	1950	Fair	37
U.s. Route 89 over Snake River	Teton	1950	Fair	5,000
US 89 over Fall Creek	Teton	1950	Fair	6,183
Ui Cnty RD 181 over Albert Creek	Uinta	1950	Poor	64
Grace Avenue over Lower Hanover Canal	Washakie	1950	Fair	326
Culbertson Avenue over Lower Hanover Canal	Washakie	1950	Fair	546
Wyo 31 over Nowood River	Big Horn	1951	Poor	688
Wyo 59 over Coal Creek	Campbell	1951	Fair	1,032
Wyo 59 over Unnamed Draw	Campbell	1951	Good	996
IRR BIA RTE 101 over Tributary To Shotgun Crk	Fremont	1951	Fair	20
IRR BIA RTE 101 over Shotgun Creek	Fremont	1951	Poor	30
US 30 over Stockpass / Sublette Crk	Lincoln	1951	Fair	2,066
US 30 over Sublette Creek	Lincoln	1951	Good	2,066
US 30 over Horse Creek	Lincoln	1951	Fair	2,066
US 191 over Muddy Creek	Sublette	1951	Fair	1,952