Thurston County, WA

216 public highway bridges

Thurston County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Thurston County, Washington contains 216 public highway bridges. Roughly 44.4% are rated “Good,” 30.1% “Fair,” and 0.5% “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.

216
Total Bridges
44.4%
Good
30.1%
Fair
0.5%
Poor Condition

Condition Distribution

Good
44.4% (96)
Fair
30.1% (65)
Poor
0.5% (1)

All Bridges (216)

SHERMAN VALLEY RD

Good

Over: WADDELL CREEK

0.75 m N of Waddell Cr Rd, Thurston, WA

Built 1982 Load: 38.1 t ADT: 352

SCHOOL LAND ROAD

Good

Over: OVERFLOW CHANNEL

1.5NW ROCHESTER, Thurston, WA

Built 1981 Load: 38.1 t ADT: 381

SR 121

Good

Over: BLOOMS DITCH

4.0 E JCT I-5, Thurston, WA

Built 2016 Load: 38.6 t ADT: 2,711

Gate Rd

Good

Over: Baker Creek

0.52 S. of Mima Creek, Thurston, WA

Built 2021 Load: 38.9 t ADT: 508

MUD BAY ROAD

Good

Over: MUD BAY

0.20 E Jct SR101, Thurston, WA

Built 1978 Load: 39.0 t ADT: 12,249

BARBOUILLAT STREET

Good

Over: OVERFLOW

0.5 WEST MIMA ROAD, Thurston, WA

Built 1999 Load: 39.0 t ADT: 50

SR 507

Good

Over: YELM CREEK

1.2 N JCT SR 510, Thurston, WA

Built 1986 Load: 39.9 t ADT: 14,693

NB I-5

Good

Over: PRAIRIE CREEK

2.4 N LEWIS CO, Thurston, WA

Built 2009 Load: 39.9 t ADT: 34,801

PRATHER ROAD SW

Good

Over: CHEHALIS RIVER

1.4 m W of Old Hwy99, Thurston, WA

Built 1988 Load: 39.9 t ADT: 620

SR 510

Good

Over: NP RY

3.9 E JCT I-5, Thurston, WA

Built 1970 Load: 40.8 t ADT: 12,915

US 12, MOON RD

Good

Over: SLOUGH

1.0 E GRAYS HBR CO, Thurston, WA

Built 1999 Load: 40.8 t ADT: 9,817

OLD HWY 99

Good

Over: PRAIRIE CREEK

1. S JCT I-5, Thurston, WA

Built 2010 Load: 40.8 t ADT: 11,240

NOSCHKA ROAD

Good

Over: NOSKI CREEK

0.65 MI. W. OF WADDELL RD, Thurston, WA

Built 2011 Load: 40.8 t ADT: 51

LITTLEROCK ROAD

Good

Over: SALMON CREEK

3.0 NW JCT SR 121, Thurston, WA

Built 2014 Load: 40.8 t ADT: 6,458

BEAVER CREEK ROAD

Good

Over: BEAVER CREEK

0.88 m from Hwy 121, Thurston, WA

Built 2017 Load: 40.8 t ADT: 430

BLK-BELMORE RD.

Good

Over: BLACK LAKE DRAINAGE DITC

N END BLACK LK, Thurston, WA

Built 1992 Load: 41.7 t ADT: 5,172

INDEPENDENCE RD

Good

Over: STREAM

0.55 N OF GRAYS COUNTY LI, Thurston, WA

Built 2010 Load: 41.7 t ADT: 888

BALD HILLS ROAD

Good

Over: LACKAMAS CREEK

7.7 m S Baldhills Rd, Thurston, WA

Built 2006 Load: 42.6 t ADT: 3,480

CASE RD EXT

Good

Over: ALLEN CREEK

0.6 m S of 113th Ave SW, Thurston, WA

Built 2007 Load: 42.6 t ADT: 28

SR 507

Good

Over: SKOOKUMCHUCK RIVER

0.7 N LEWIS CO, Thurston, WA

Built 1971 Load: 43.5 t ADT: 2,823

MARTIN WAY E

Good

Over: SLOUGH

.19 m SW of Nisqually Cut, Thurston, WA

Built 2000 Load: 44.4 t ADT: 17,895

SB I-5

Good

Over: PRAIRIE CREEK

2.4 N LEWIS CO, Thurston, WA

Built 2010 Load: 45.4 t ADT: 34,801

MCLANE DELPHI ROAD

Good

Over: MCLANE CREEK

50 yd S of Mckenz Rd intr, Thurston, WA

Built 1992 Load: 45.4 t ADT: 2,686

STEIACOOM ROAD

Good

Over: HARTMAN CREEK

1 MILE E DUTERROW INT, Thurston, WA

Built 2001 Load: 46.3 t ADT: 1,001

188th Ave SW

Good

Over: OVERFLOW

1st Bridge E of Casino, Thurston, WA

Built 2002 Load: 46.3 t ADT: 1,114

128TH AV SW

Good

Over: UNNAMED STREAM

0.08 MILE W LITTLEROCK RD, Thurston, WA

Built 2007 Load: 46.3 t ADT: 3,047

SR 510

Good

Over: BNSF RAILROAD

4.1 E JCT I-5, Thurston, WA

Built 1970 Load: 47.2 t ADT: 12,915

PLEASANT GLADE RD

Good

Over: WOODLAND CREEK

0.85 m E of SleaterKinney, Thurston, WA

Built 2003 Load: 48.1 t ADT: 420

LITTLE ROCK RD

Good

Over: BEAVER CREEK

6.9 JCT SR 12, Thurston, WA

Built 1951 Load: 49.0 t ADT: 3,577

US 12

Good

Over: CMSTPP RR

7.7 E GRAYS HBR CO, Thurston, WA

Built 2011 Load: 49.0 t ADT: 22,939

188 SW

Good

Over: OVERFLOW CHANNEL

2nd Bridge E of Casino, Thurston, WA

Built 2002 Load: 49.9 t ADT: 1,114

REEDER ROAD N

Good

Over: BEAVER CREEK

.13 m N of Maytown Rd, Thurston, WA

Built 2021 Load: 49.9 t ADT: 10

US 101 SB

Good

Over: DESCHUTES PARKWAY

5.8 E JCT SR 8, Thurston, WA

Built 1987 Load: 50.8 t ADT: 30,207

SUMMIT LAKE ROAD

Good

Over: KENNEDY CREEK

0.2 m East of SR8, Thurston, WA

Built 1985 Load: 51.7 t ADT: 671

JAMES ROAD

Good

Over: OVERFLOW CHANNEL

1. S JCT SR12, Thurston, WA

Built 1985 Load: 52.6 t ADT: 1,265

JAMES ROAD SW

Good

Over: SCATTER CREEK

0.46 m W of Denmark Rd, Thurston, WA

Built 1982 Load: 52.6 t ADT: 1,265

143RD AVE S W

Good

Over: SCATTER CREEK

0.25 m N jct. SR 507, Thurston, WA

Built 1987 Load: 52.6 t ADT: 1,256

123RD. S.W.

Good

Over: BLACK RIVER

0.37m W of Littlerock Rd, Thurston, WA

Built 1986 Load: 52.6 t ADT: 229

Mullen Road

Good

Over: CREEK

.7 mi. W of Marvin Rd, Thurston, WA

Built 1999 Load: 52.6 t ADT: 7,703

WADDELL CREEK RD.

Good

Over: STONEY CREEK

00.3W DELPHI Rd, Thurston, WA

Built 1976 Load: 53.5 t ADT: 1,531

RICH ROAD

Good

Over: DESCHUTES RIVER

0.2 m E of Old Hwy 99, Thurston, WA

Built 1981 Load: 53.5 t ADT: 3,843

DELPHI ROAD SW

Good

Over: MCLANE CREEK

0.9 m S of SR101 overpass, Thurston, WA

Built 1993 Load: 53.5 t ADT: 2,686

MOON ROAD

Good

Over: OVERFLOW CHANNEL

.27 S JCT SR12, Thurston, WA

Built 1998 Load: 53.5 t ADT: 1,003

JOHNSON CREEK ROAD

Good

Over: JOHNSON CREEK

.4 m N Skookumchuck Rd, Thurston, WA

Built 1985 Load: 54.4 t ADT: 324

WILKENSEN ROAD

Good

Over: CENTRALIA CANAL

.3 m N of NorPacif Rd, Thurston, WA

Built 1986 Load: 55.3 t ADT: 5,357

MILITARY ROAD

Good

Over: DESCUTES RIVER

2. NW JCT SR507, Thurston, WA

Built 1984 Load: 58.0 t ADT: 911

W 4th Avenue

Good

Over: Budd Inlet W. Bay & BNRR

4th Avenue, Thurston, WA

Built 2004 Load: 58.0 t ADT: 20,060

175 TH S.W.

Good

Over: OVERFLOW CHANNEL

0.6 m W of Moon Rd, Thurston, WA

Built 1997 Load: 59.0 t ADT: 77

MORNINGSIDE DRIVE

Good

Over: SCATTER CREEK

.2 W JCT SR 507, Thurston, WA

Built 1995 Load: 61.7 t ADT: 26

SKOOKUMCHUCK ROAD

Good

Over: SKOOKUMCHUCK RIVER

5.SE JCT SR507, Thurston, WA

Built 1996 Load: 61.7 t ADT: 246

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.