Campbell County, WY

158 public highway bridges

Campbell County Bridge Snapshot

Campbell County, Wyoming contains 158 public highway bridges in the FHWA National Bridge Inventory. Roughly 23.4% are rated “Good,” 52.5% “Fair,” 1.9% “Poor,” and 1.9% 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.

158

Total Bridges

23.4%

Good

1.9%

Poor

1.9%

Structurally Deficient

Condition Distribution

Good

23.4% (37)

Fair

52.5% (83)

Poor

1.9% (3)

SD

1.9% (3)

All Bridges (158)

Sort:

I-90 WBL

Over: Machinery Pass

Buffalo - Gillette, Campbell, WY

Built 1962 Load: 26.1 t ADT: 1,833

WYO 51

Over: Donkey Creek Overflow

Gillette - Moorcroft, Campbell, WY

Built 1952 Load: 26.3 t ADT: 1,323

WYO 59

Over: BNSF Railway

Gillette - Mont Line, Campbell, WY

Built 1979 Load: 26.3 t ADT: 1,333

I-90 WBL

Over: Machinery Pass

Gillette - Moorcroft, Campbell, WY

Built 1976 Load: 29.9 t ADT: 3,644

US 14

Over: Horse Creek

Ucross - Jct WYO 59, Campbell, WY

Built 1983 Load: 29.9 t ADT: 1,318

I-90 EBL

Over: Machinery Pass

Gillette - Moorcroft, Campbell, WY

Built 1976 Load: 30.8 t ADT: 3,552

WYO 59

Over: Spring Creek

Douglas - Reno Jct, Campbell, WY

Built 1979 Load: 30.8 t ADT: 2,891

WYO 51

Over: BNSF Railway

Gillette-Moorcroft, Campbell, WY

Built 2007 Load: 30.8 t ADT: 1,323

El Camino Court

Over: Stonepile Creek

Gillette Streets, Campbell, WY

Built 1984 Load: 31.0 t ADT: 1,048

I-90 EBL

Over: W Fork Wild Horse Creek

Buffalo - Gillette, Campbell, WY

Built 1960 Load: 31.8 t ADT: 2,057

I-90 EBL

Over: E Fork Wild Horse Creek

Buffalo - Gillette, Campbell, WY

Built 1960 Load: 31.8 t ADT: 2,057

I-90 WBL

Over: E Fork Wild Horse Creek

Buffalo - Gillette, Campbell, WY

Built 1960 Load: 31.8 t ADT: 2,114

WYO 59

Over: Caballo Creek

Reno Jct - Gillette, Campbell, WY

Built 1972 Load: 31.8 t ADT: 5,962

WYO 59

Over: Unnamed Draw

Reno Jct - Gillette, Campbell, WY

Built 1977 Load: 31.8 t ADT: 5,714

WYO 51

Over: Stonepile Creek

Gillette, Campbell, WY

Built 1984 Load: 32.4 t ADT: 5,678

WYO 51

Over: Unnamed Draw

Gillette - Moorcroft, Campbell, WY

Built 1952 Load: 32.7 t ADT: 1,452

WYO 59

Over: Unnamed Draw

Gillette - Mont Line, Campbell, WY

Built 1954 Load: 32.7 t ADT: 543

WYO 59

Over: Donkey Creek

Reno Jct - Gillette, Campbell, WY

Built 1975 Load: 32.7 t ADT: 22,301

WYO 59

Over: Coal Creek

Gillette - Mont Line, Campbell, WY

Built 1951 Load: 32.7 t ADT: 1,030

WYO 59

Over: Burlington Supply Ditch

Gillette, Campbell, WY

Built 1941 Load: 32.7 t ADT: 14,308

I-90 EBL and WBL

Over: Stonepile Creek

Gillette Marginal, Campbell, WY

Built 1974 Load: 32.7 t ADT: 3,744

I-90 EBL and WBL

Over: Unnamed Draw

Gillette - Moorcroft, Campbell, WY

Built 1976 Load: 32.7 t ADT: 3,173

I-90 EBL Off Ramp

Over: Unnamed Draw

Gillette - Moorcroft, Campbell, WY

Built 1976 Load: 32.7 t ADT: 471

I-90 EBL and WBL

Over: Unnamed Draw

Gillette - Moorcroft, Campbell, WY

Built 1976 Load: 32.7 t ADT: 3,552

WYO 59

Over: Stonepile Creek

Gillette, Campbell, WY

Built 1981 Load: 32.7 t ADT: 14,308

N Burma Avenue

Over: Stonepile Creek

North Burma Road Gillette, Campbell, WY

Built 1979 Load: 32.7 t ADT: 1,313

Cl Cnty Rd 117

Over: Stonepile Creek

Gillette, Campbell, WY

Built 1982 Load: 32.7 t ADT: 2,756

Echeta Road

Over: Stonepile Creek

Gillette-Echeta Road, Campbell, WY

Built 1984 Load: 32.7 t ADT: 3,547

WYO 50

Over: Mud Spring Creek

Savageton-Pine Tree, Campbell, WY

Built 1985 Load: 32.7 t ADT: 1,501

WYO 50

Over: S Branch Fourmile Creek

Savageton-Pine Tree, Campbell, WY

Built 1985 Load: 32.7 t ADT: 1,501

Cl Cnty Rd 99B

Over: Machinery Pass

20 Mi. S.E. Of Gillette, Campbell, WY

Built 1983 Load: 32.7 t ADT: 150

Cl Cnty Rd 11

Over: SA Creek

Big Powder River Road, Campbell, WY

Built 1991 Load: 32.7 t ADT: 20

Cl Cnty Rd 61

Over: Belle Fourche River

O.R. County Road, Campbell, WY

Built 1990 Load: 32.7 t ADT: 43

WYO 59

Over: N F Little Rawhide Creek

Gillette-Montana, Campbell, WY

Built 1989 Load: 32.7 t ADT: 235

WYO 59

Over: Dry Fork Creek

Gillette-Montana, Campbell, WY

Built 1960 Load: 32.7 t ADT: 1,333

Cl Cnty Rd 38N

Over: Donkey Creek

S E Gillette, Campbell, WY

Built 1999 Load: 32.7 t ADT: 5,818

Sinclair Street

Over: Unnamed Draw

Gillette, Campbell, WY

Built 2009 Load: 32.7 t ADT: 2,325

Cl Cnty Rd 1

Over: Donkey Creek

15 Mi E Of Gillette, Campbell, WY

Built 2010 Load: 32.7 t ADT: 595

WYO 450

Over: N Prong Lttle Thunder Cr

8 Mi. SW of Wright, Campbell, WY

Built 1978 Load: 32.7 t ADT: 1,476

I-90 WBL

Over: W Fork Wild Horse Creek

Buffalo - Gillette, Campbell, WY

Built 1960 Load: 33.6 t ADT: 2,114

I-90 EBL

Over: Machinery Pass

Gillette - Moorcroft, Campbell, WY

Built 1974 Load: 33.6 t ADT: 3,173

I-90 WBL

Over: Machinery Pass

Gillette - Moorcroft, Campbell, WY

Built 1974 Load: 33.6 t ADT: 3,020

US 14

Over: North Wildcat Creek

Ucross - Jct WYO 59, Campbell, WY

Built 1983 Load: 33.6 t ADT: 1,318

WYO 450

Over: Machinery Pass

Newcastle - Jct WYO 59, Campbell, WY

Built 1977 Load: 34.5 t ADT: 1,476

WYO 59

Over: East Fork Hay Creek

Reno Jct - Gillette, Campbell, WY

Built 1977 Load: 34.7 t ADT: 5,017

US 14

Over: Spotted Horse Creek

Ucross - Jct WYO 59, Campbell, WY

Built 1977 Load: 35.4 t ADT: 492

WYO 387

Over: Hay Creek

Midwest - Reno Jct, Campbell, WY

Built 1982 Load: 36.3 t ADT: 2,688

Cl Cnty Rd 98

Over: Little Powder River

50 Mi N Of Gillette, Campbell, WY

Built 1987 Load: 36.3 t ADT: 17

WYO 59

Over: Dry Creek

Reno Jct - Gillette, Campbell, WY

Built 1977 Load: 37.2 t ADT: 5,017

WYO 387

Over: Dry Fork Powder River

Midwest - Reno Jct, Campbell, WY

Built 1980 Load: 37.2 t ADT: 1,784

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 6, 2026