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:

Union Pacific RR

Over: West 2nd South Street

T18N R107W S22, Sweetwater, WY

Built 1930 ADT: 5,390

Union Pacific RR

Over: WYO 374

18N 109W S16, Sweetwater, WY

Built 1981 ADT: 1,111

Union Pacific RR

Over: I-80

18N 109W S16, Sweetwater, WY

Built 1981 ADT: 7,705

College Drive

Over: I-80

Rock Springs Marginal, Sweetwater, WY

Built 1989 ADT: 9,213

I-80 EBL On Ramp

Over: I-80

Evanston - Green River, Sweetwater, WY

Built 1992 ADT: 7,229

WYO 530 NBL

Over: UPRR / I-80 Bus

Green River, Sweetwater, WY

Built 1994 ADT: 8,087

I-80 EBL

Over: West Green River Intg

Green River Marginal, Sweetwater, WY

Built 1995 ADT: 329

I-80 WBL

Over: West Green River Intg

Green River Marginal, Sweetwater, WY

Built 1995 ADT: 329

I-80 EBL

Over: US 191

Rock Springs Marginal, Sweetwater, WY

Built 2004 ADT: 12,310

I-80 WBL

Over: US 191

Rock Springs Marginal, Sweetwater, WY

Built 2005 ADT: 12,310

I-80 EBL

Over: East Green River Intg

Green River Marginal, Sweetwater, WY

Built 2002 ADT: 87

I-80 WBL

Over: East Green River Intg

Green River Marginal, Sweetwater, WY

Built 2002 ADT: 87

I-80 EBL

Over: UPRR / Killpecker Creek

Rock Springs Marginal, Sweetwater, WY

Built 2004 ADT: 865

I-80 WBL

Over: UPRR / Killpecker Creek

Rock Springs Marginal, Sweetwater, WY

Built 2005 ADT: 865

A Street

Over: UPRR / S. Main Street

Elk Street, Sweetwater, WY

Built 2006 ADT: 258

I-80 EBL

Over: Dewar Drive

Rock Springs Marginal, Sweetwater, WY

Built 2007 ADT: 23,409

I-80 WBL

Over: Dewar Drive

Rock Springs Marginal, Sweetwater, WY

Built 2007 ADT: 20,589

I-80 EBL

Over: Swanson Drive

Rock Springs Marginal, Sweetwater, WY

Built 2007 ADT: 1,658

I-80 WBL

Over: Swanson Drive

Rock Springs Marginal, Sweetwater, WY

Built 2008 ADT: 1,658

I-80 EBL

Over: 9th Street

Rock Springs Marginal, Sweetwater, WY

Built 2007 ADT: 3,939

I-80 WBL

Over: 9th Street

Rock Springs Marginal, Sweetwater, WY

Built 2008 ADT: 3,939

I-80 EBL

Over: Rasmussen Road

Rock Springs - Rawlins, Sweetwater, WY

Built 2009 ADT: 113

I-80 WBL

Over: Rasmussen Road

Rock Springs - Rawlins, Sweetwater, WY

Built 2010 ADT: 113

I-80 EBL

Over: Kelly Street

Rock Springs - Rawlins, Sweetwater, WY

Built 2009 ADT: 340

I-80 WBL

Over: Kelly Street

Rock Springs - Rawlins, Sweetwater, WY

Built 2010 ADT: 340

I-80 EBL

Over: Wamsutter-Crooks Gap Rd

Rock Springs - Rawlins, Sweetwater, WY

Built 2009 ADT: 784

I-80 WBL

Over: Wamsutter-Crooks Gap Rd

Rock Springs - Rawlins, Sweetwater, WY

Built 2010 ADT: 784

US 191

Over: I-80

Rock Springs Marginal, Sweetwater, WY

Built 2014 ADT: 13,057

I-80 EBL

Over: WYO 371

Rock Springs - Rawlins, Sweetwater, WY

Built 2019 ADT: 334

I-80 WBL

Over: WYO 371

Rock Springs - Rawlins, Sweetwater, WY

Built 2019 ADT: 334

Interchange Road

Over: I-80

Rock Springs Marginal, Sweetwater, WY

Built 2022 ADT: 10,663

I-80 EBL

Over: Baxter Road

Rock Springs - Rawlins, Sweetwater, WY

Built 2022 ADT: 1,376

I-80 WBL

Over: Baxter Road

Rock Springs - Rawlins, Sweetwater, WY

Built 2021 ADT: 1,376

LITTLE SANDY REC S

Over: Little Sandy Creek

8 mi NE of Farson, WY, Sweetwater, WY

Built 1920 Load: 7.1 t ADT: 25

WYO 374

Over: Unnamed Draw

Jct I-80 - Green River, Sweetwater, WY

Built 1942 Load: 20.2 t ADT: 2,369

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1960 Load: 22.2 t ADT: 6,463

I-80 WBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1960 Load: 22.2 t ADT: 6,419

WYO 374

Over: Unnamed Draw

Jct I-80 - Green River, Sweetwater, WY

Built 1942 Load: 22.5 t ADT: 1,111

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1960 Load: 22.9 t ADT: 6,424

I-80 WBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1960 Load: 23.2 t ADT: 6,381

WYO 374

Over: UPRR

Jct I-80 - Green River, Sweetwater, WY

Built 1946 Load: 23.6 t ADT: 3,024

Sw Cnty Rd 28

Over: Means Canal

10 Miles N. Of Farson, Sweetwater, WY

Built 1996 Load: 23.6 t ADT: 10

I-80 EBL

Over: Machinery Pass

Evanston - Green River, Sweetwater, WY

Built 1967 Load: 25.4 t ADT: 7,490

I-80 WBL

Over: Machinery Pass

Evanston - Green River, Sweetwater, WY

Built 1967 Load: 25.4 t ADT: 7,705

I-80 WBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1962 Load: 27.1 t ADT: 6,653

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1963 Load: 27.4 t ADT: 6,528

I-80 WBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1963 Load: 27.4 t ADT: 6,551

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1962 Load: 27.4 t ADT: 6,618

I-80 EBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1963 Load: 27.8 t ADT: 7,088

I-80 WBL

Over: Machinery Pass

Rock Springs - Rawlins, Sweetwater, WY

Built 1963 Load: 27.8 t ADT: 7,114

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