Sweetwater County, WY

196 public highway bridges

Sweetwater County Bridge Snapshot

Sweetwater County, Wyoming contains 196 public highway bridges in the FHWA National Bridge Inventory. Roughly 19.4% are rated “Good,” 33.2% “Fair,” 5.1% “Poor,” and 5.1% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in WY are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

196

Total Bridges

19.4%

Good

5.1%

Poor

5.1%

Structurally Deficient

Condition Distribution

Good

19.4% (38)

Fair

33.2% (65)

Poor

5.1% (10)

SD

5.1% (10)

All Bridges (196)

Sort:

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1962 Load: 27.8 t ADT: 6,627

I-80 WBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1962 Load: 27.8 t ADT: 6,832

Spring Drive

Over: Killpecker Creek

Rock Springs, Sweetwater, WY

Built 1975 Load: 29.0 t ADT: 1,226

WYO 789

Over: UPRR

Creston Jct - Colo Line, Sweetwater, WY

Built 1965 Load: 29.4 t ADT: 1,193

WYO 376

Over: Bitter Creek

Rock Springs Circumferent, Sweetwater, WY

Built 1977 Load: 29.9 t ADT: 14,824

I-80 EBL

Over: Machinery Pass

Evanston - Green River, Sweetwater, WY

Built 1967 Load: 30.8 t ADT: 6,937

I-80 WBL

Over: Machinery Pass

Evanston - Green River, Sweetwater, WY

Built 1967 Load: 30.8 t ADT: 6,699

I-80 EBL

Over: Blacks Fork River

Evanston - Green River, Sweetwater, WY

Built 1967 Load: 30.8 t ADT: 7,490

WYO 28

Over: Little Sandy River

Farson - Jct Us 287, Sweetwater, WY

Built 1982 Load: 30.8 t ADT: 1,783

WYO 376

Over: Machinery Pass

Rock Springs Circumferent, Sweetwater, WY

Built 1980 Load: 31.8 t ADT: 1,545

I-80 EBL

Over: UPRR

Evanston - Green River, Sweetwater, WY

Built 1966 Load: 32.7 t ADT: 7,490

I-80 WBL

Over: UPRR

Evanston - Green River, Sweetwater, WY

Built 1966 Load: 32.7 t ADT: 7,705

I-80 EBL and WBL

Over: Alkali Flat

Rock Springs Marginal, Sweetwater, WY

Built 1964 Load: 32.7 t ADT: 10,492

I-80 Service Road

Over: Alkali Flat

Rock Springs, Sunset Dr, Sweetwater, WY

Built 1953 Load: 32.7 t ADT: 1,834

I-80 EBL

Over: Piker Springs Creek

Rock Springs - Rawlins, Sweetwater, WY

Built 1963 Load: 32.7 t ADT: 6,603

I-80 WBL

Over: Piker Springs Creek

Rock Springs - Rawlins, Sweetwater, WY

Built 1963 Load: 32.7 t ADT: 6,639

I-80 EBL

Over: Filmore Creek

Rock Springs - Rawlins, Sweetwater, WY

Built 1962 Load: 32.7 t ADT: 6,618

WYO 374

Over: Unnamed Draw

Jct I-80 - Green River, Sweetwater, WY

Built 1946 Load: 32.7 t ADT: 558

WYO 430

Over: Salt Wells Creek

Rock Springs - Colo Line, Sweetwater, WY

Built 1958 Load: 32.7 t ADT: 316

Spruce Street

Over: Blacks Fork River

Spruce Street, Sweetwater, WY

Built 1984 Load: 32.7 t ADT: 113

Sw Cnty Rd 85

Over: Unnamed Draw

6 Mi Se Little America, Sweetwater, WY

Built 1980 Load: 32.7 t ADT: 715

Sw Cnty Rd 85

Over: Meadow Springs Draw

4 Mi Se Of Little America, Sweetwater, WY

Built 1980 Load: 32.7 t ADT: 715

Sw Cnty Rd 1199

Over: Greasewood Creek

Riovista S-Div Johnson Wy, Sweetwater, WY

Built 1940 Load: 32.7 t ADT: 258

I-80 Service Road

Over: Unnamed Draw

Rawlins West, Sweetwater, WY

Built 1963 Load: 32.7 t ADT: 6

I-80 EBL and WBL

Over: Unnamed Draw

Rock Springs - Rawlins, Sweetwater, WY

Built 1967 Load: 32.7 t ADT: 6,412

WYO 430

Over: North Alkali Creek

Rock Springs - Colo Line, Sweetwater, WY

Built 1956 Load: 33.6 t ADT: 243

WYO 28

Over: Eden Canal

Farson - Lander Road, Sweetwater, WY

Built 1985 Load: 35.4 t ADT: 1,270

Stagecoach Blvd

Over: Killpecker Creek

Rock Springs Streets, Sweetwater, WY

Built 1987 Load: 35.4 t ADT: 4,071

I-80 / US 30 Bus

Over: Bitter Creek

Rock Springs, Dewar Drive, Sweetwater, WY

Built 1991 Load: 35.4 t ADT: 14,199

US 191

Over: UPRR

Jct I-80 - Utah Line, Sweetwater, WY

Built 1966 Load: 36.3 t ADT: 3,942

US 191

Over: Bitter Creek

Jct I-80 - Utah Line, Sweetwater, WY

Built 1966 Load: 38.1 t ADT: 3,942

US 191

Over: Killpecker Creek

Rock Springs - Farson, Sweetwater, WY

Built 1954 Load: 39.0 t ADT: 2,063

WYO 28

Over: Big Sandy River

Farson-Fontenelle, Sweetwater, WY

Built 1986 Load: 39.0 t ADT: 548

US 191

Over: Big Sandy River

Farson - Pinedale, Sweetwater, WY

Built 1958 Load: 39.9 t ADT: 3,171

US 191

Over: Little Sandy River

Rock Springs - Farson, Sweetwater, WY

Built 1958 Load: 40.8 t ADT: 3,089

WYO 370

Over: Bitter Creek

Rock Springs Airport Road, Sweetwater, WY

Built 1984 Load: 40.8 t ADT: 1,376

WYO 530 NBL

Over: Green River

Green River, Sweetwater, WY

Built 1953 Load: 41.7 t ADT: 9,742

US 30

Over: Blacks Fork River

Kemmerer-Granger Jct., Sweetwater, WY

Built 1998 Load: 41.7 t ADT: 1,496

Sw Cnty Rd 23S

Over: UPRR

Wamsutter Streets, Sweetwater, WY

Built 2003 Load: 42.6 t ADT: 784

WYO 374

Over: Blacks Fork River

8 mi E of Little America, Sweetwater, WY

Built 1946 Load: 44.5 t ADT: 1,111

US 30

Over: UPRR

Kemmerer-Granger Jct., Sweetwater, WY

Built 1998 Load: 44.5 t ADT: 1,496

Sw Cnty Rd 58

Over: Killpecker Creek

1 Mile North Of Rock Spri, Sweetwater, WY

Built 2009 Load: 47.2 t ADT: 4,674

Interchange Road

Over: Bitter Creek

2 Miles W Of Rock Springs, Sweetwater, WY

Built 1985 Load: 49.0 t ADT: 97

US 191

Over: Bitter Creek

Jct 1-80 - Jct U-4304, Sweetwater, WY

Built 1982 Load: 49.9 t ADT: 7,711

Scotts Bottom Road

Over: Green River

Green River, Sweetwater, WY

Built 2010 Load: 49.9 t ADT: 767

Sw Cnty Rd 8

Over: Green River

Fontenelle - Co. Line, Sweetwater, WY

Built 1991 Load: 53.1 t ADT: 251

Connecticut Ave

Over: Dead Horse Canyon Creek

Rock Springs, Sweetwater, WY

Built 1995 Load: 55.9 t ADT: 1,162

3318: SHELL CREEK

Over: SAND CREEK

15 mi W of Baggs, WY, Sweetwater, WY

Built 2002 Load: 62.9 t ADT: 100

LUCERNE

Over: LINWOOD

.3 MI E JCT WYO-530, Sweetwater, WY

Built 1963 ADT: 20

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1962 Load: 24.9 t ADT: 6,427

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026