Natrona County, WY

138 public highway bridges

Natrona County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Natrona County, Wyoming contains 138 public highway bridges. Roughly 22.5% are rated “Good,” 47.1% “Fair,” and 3.6% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

138
Total Bridges
22.5%
Good
47.1%
Fair
3.6%
Poor Condition

Condition Distribution

Good
22.5% (31)
Fair
47.1% (65)
Poor
3.6% (5)

All Bridges (138)

I-25 NBL

Unknown

Over: Na CR 600 (Blackmore)

Casper Marginal, Natrona, WY

Built 1968 ADT: 3,326

I-25 SBL

Unknown

Over: Na CR 600 (Blackmore)

Casper Marginal, Natrona, WY

Built 1968 ADT: 3,326

BNSF Railway

Unknown

Over: I-25

Casper, Natrona, WY

Built 1958 ADT: 12,268

N Beverly Street

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1960 ADT: 12,268

I-25 NBL

Unknown

Over: North McKinley Street

Casper Marginal, Natrona, WY

Built 1958 ADT: 1,829

I-25 NBL

Unknown

Over: Wardwell Road Intg

Casper Marginal, Natrona, WY

Built 1964 ADT: 2,344

I-25 SBL

Unknown

Over: Wardwell Road Intg

Casper Marginal, Natrona, WY

Built 1964 ADT: 4,717

I-25 NBL

Unknown

Over: Westwinds Road

Casper Marginal, Natrona, WY

Built 1964 ADT: 583

I-25 SBL

Unknown

Over: Westwinds Road

Casper Marginal, Natrona, WY

Built 1964 ADT: 583

I-25 NBL

Unknown

Over: Ormsby Road

Casper - Kaycee, Natrona, WY

Built 1971 ADT: 83

I-25 SBL

Unknown

Over: Ormsby Road

Casper - Kaycee, Natrona, WY

Built 1971 ADT: 83

Hereford Lane

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1960 ADT: 11,987

US 20/26 Conn. EBL

Unknown

Over: Na County Road 129

Casper, Natrona, WY

Built 1960 ADT: 105

US 20/26 Conn. WBL

Unknown

Over: Na County Road 129

Casper, Natrona, WY

Built 1960 ADT: 105

WYO 253

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1968 ADT: 4,702

US 20/26/87

Unknown

Over: I-25

Casper Marginal, Natrona, WY

Built 1968 ADT: 12,268

BNSF Railway

Unknown

Over: North Center Street

Center Street Casper, Natrona, WY

Built 1941 ADT: 7,099

Shepperson Road

Unknown

Over: I-25

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 1,464

I-25 SBL

Unknown

Over: Na CR 115 (Smokey Gap)

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 8

I-25 NBL

Unknown

Over: WYO 387

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 427

I-25 NBL

Unknown

Over: I-25 Service Road

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 5

I-25 SBL

Unknown

Over: I-25 Service Road

Casper - Kaycee, Natrona, WY

Built 1980 ADT: 5

I-25 SBL

Unknown

Over: North McKinley Street

Casper Marginal, Natrona, WY

Built 1958 ADT: 1,829

I-25 SBL

Unknown

Over: North Center Street

Casper Marginal, Natrona, WY

Built 1958 ADT: 7,099

Unnamed Road

Unknown

Over: I-25

Casper - Kaycee, Natrona, WY

Built 1981 ADT: 1,515

I-25 NBL

Unknown

Over: WYO 259

Casper - Kaycee, Natrona, WY

Built 1976 ADT: 3,812

I-25 SBL

Unknown

Over: WYO 259

Casper - Kaycee, Natrona, WY

Built 1976 ADT: 1,106

BNSF Railway

Unknown

Over: North McKinley Street

McKinley Street Casper, Natrona, WY

Built 1945 ADT: 4,863

I-25 NBL

Unknown

Over: US 20 / 26 Connector

Casper Marginal, Natrona, WY

Built 1984 ADT: 1,672

I-25 SBL

Unknown

Over: US 20 / 26 Connector

Casper Marginal, Natrona, WY

Built 1984 ADT: 4,485

I-25 NBL

Unknown

Over: WYO 220

Casper Marginal, Natrona, WY

Built 1985 ADT: 14,551

I-25 SBL

Unknown

Over: WYO 220

Casper Marginal, Natrona, WY

Built 1985 ADT: 14,551

Ranch Road

Unknown

Over: I-25

Casper - Kaycee, Natrona, WY

Built 2002 ADT: 1,464

I-25 NBL

Unknown

Over: WYO 258 (Wyoming Blvd)

Casper Marginal, Natrona, WY

Built 2006 ADT: 12,576

I-25 SBL

Unknown

Over: WYO 258 (Wyoming Blvd)

Casper Marginal, Natrona, WY

Built 2007 ADT: 12,576

WYO 254

Unknown

Over: US 20 / 26 Connector

Casper, Natrona, WY

Built 2015 ADT: 5,629

I-25 NBL and SBL

Unknown

Over: Walsh Drive

Casper Marginal, Natrona, WY

Built 2022 ADT: 5,717

Na Cnty Rd 412

Fair

Over: Mowrey Draw

3 Mi N.E. Of Alcova, Natrona, WY

Built 1929 Load: 14.3 t ADT: 87

Na Cnty Rd 209

Fair

Over: M Casper Creek

0.30 Miles S. Of Natrona, Natrona, WY

Built 1970 Load: 20.2 t ADT: 23

6902: PATHFINDER R

Fair

Over: NORTH PLATTE RIVER

10 miles SW of Alcova, WY, Natrona, WY

Built 1995 Load: 23.7 t ADT: 70

US 20 Service Road

Fair

Over: Elkhorn Creek

East Yellowstone - Casper, Natrona, WY

Built 1957 Load: 23.9 t ADT: 180

Na Cnty Rd 117

Fair

Over: Unnamed Draw

1 Mile East Of Edgerton, Natrona, WY

Built 1967 Load: 26.1 t ADT: 6

Na Cnty Rd 110

Fair

Over: Cloud Creek

18 Miles N. Of Natrona, Natrona, WY

Built 1924 Load: 27.8 t ADT: 1,055

US 20/26/87

Fair

Over: Claude Creek

East Yellowstone - Casper, Natrona, WY

Built 1957 Load: 28.1 t ADT: 2,833

WYO 220

Fair

Over: Eagle Creek

Muddy Gap Jct-WYO 487 Jct, Natrona, WY

Built 1967 Load: 29.9 t ADT: 3,066

WYO 487

Fair

Over: Sand Creek

Medicine Bow - Jt WYO 220, Natrona, WY

Built 1981 Load: 29.9 t ADT: 832

Na Cnty Rd 402

Fair

Over: Corral Creek

16 Miles S. Of Casper, Natrona, WY

Built 1970 Load: 30.4 t ADT: 23

I-25 Service Road

Fair

Over: Dugout Creek

WYO 387 Jct - Buffalo, Natrona, WY

Built 1957 Load: 30.7 t ADT: 5

WYO 220

Fair

Over: Dry Creek

Muddy Gap Jct-WYO 487 Jct, Natrona, WY

Built 1970 Load: 30.8 t ADT: 1,771

WYO 254

Fair

Over: Casper Creek

Salt Creek Conn Casper, Natrona, WY

Built 1979 Load: 30.8 t ADT: 4,809

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.