Grant County, WA

314 public highway bridges

Grant County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Grant County, Washington contains 314 public highway bridges. Roughly 60.5% are rated “Good,” 30.3% “Fair,” and 1.6% “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.

314
Total Bridges
60.5%
Good
30.3%
Fair
1.6%
Poor Condition

Condition Distribution

Good
60.5% (190)
Fair
30.3% (95)
Poor
1.6% (5)

All Bridges (314)

SO. FRONTAGE RD

Good

Over: WEBER COULEE

S Frontage 2.9 E of U SE, Grant, WA

Built 1938 Load: 28.2 t ADT: 94

1 RD SE

Good

Over: WEBER WASTEWAY

1 SE 0.2 West of S SE, Grant, WA

Built 1950 Load: 28.2 t ADT: 156

O RD NE

Good

Over: LATERAL W 1150

O NE .5 South of 3 NE, Grant, WA

Built 1987 Load: 28.2 t ADT: 593

7 NW

Good

Over: West Canal

7 NW 0.1 West of R NW, Grant, WA

Built 2004 Load: 28.2 t ADT: 680

8 ROAD SE

Good

Over: EAST LOW CANAL BLK 44

8 SE 0.6 W of W SE, Grant, WA

Built 1985 Load: 28.8 t ADT: 719

4 RD SE

Good

Over: WASTEWAY

4 SE 0.4 West of M SE, Grant, WA

Built 1987 Load: 28.8 t ADT: 138

E RD SW

Good

Over: WAHLUKE BRANCH CANAL

E SW .6 N of Wahlike Rd, Grant, WA

Built 1969 Load: 28.8 t ADT: 303

M NW

Good

Over: West Canal

M NW 0.2 S of 11, Grant, WA

Built 2004 Load: 28.8 t ADT: 560

3 RD SE

Good

Over: WASTEWAY

3 SE .5 West of M SE, Grant, WA

Built 1987 Load: 29.2 t ADT: 78

BASELINE WEST

Good

Over: LAT. BLK 73

Baseline .1 East of V NW, Grant, WA

Built 1987 Load: 29.8 t ADT: 650

MAINTENANCE ROAD

Good

Over: WEST CANAL

DRY COULEE SIPHON 1 OUTLE, Grant, WA

Built 1946 Load: 29.9 t ADT: 5

MAINTENANCE ROAD

Good

Over: WEST CANAL

Dry Coulee Siphon 2 Outle, Grant, WA

Built 1946 Load: 29.9 t ADT: 5

SR 28

Good

Over: WINCHESTER WASTEWAY

8.4 E JCT SR 281, Grant, WA

Built 1949 Load: 30.1 t ADT: 5,489

M.5 RD SW

Good

Over: SADDLE MOUNTAIN WW

M.5 0.1 S of 24 SW, Grant, WA

Built 1974 Load: 30.1 t ADT: 50

C RD SE

Good

Over: WEST CANAL

C SE .7 N of 12, Grant, WA

Built 1964 Load: 30.1 t ADT: 139

K RD SW

Good

Over: WAHLUKE BRANCH CANAL

K SW .4 N of 22.5, Grant, WA

Built 1969 Load: 30.5 t ADT: 229

R SW

Good

Over: WALUKE BRANCH CANAL

R SW @ 23 SW, Grant, WA

Built 1983 Load: 30.5 t ADT: 247

I RD SW

Good

Over: WAHLUKE BRANCH CANAL

I SW .5 N of Wahluke Rd, Grant, WA

Built 1969 Load: 30.8 t ADT: 106

8 ROAD NE

Good

Over: EAST LOW CANAL BLK 40

8 NE .3 East of N NE, Grant, WA

Built 1989 Load: 30.8 t ADT: 92

0 SW

Good

Over: WALUKE BRANCH CANAL

O SW 0.1 N of 23 SW, Grant, WA

Built 1983 Load: 30.8 t ADT: 210

7 RD NW

Good

Over: IRR. CANAL

7 NW 0.8 East of Dodson, Grant, WA

Built 2001 Load: 31.1 t ADT: 193

L ROAD SW

Good

Over: LAT. RB4 BLK 82

Adams Rd .6 N of 11 SW, Grant, WA

Built 1990 Load: 31.4 t ADT: 1,034

24 ROAD SW

Good

Over: LAT. WB46 BLK 251

24 SW .6 East of O, Grant, WA

Built 1969 Load: 31.4 t ADT: 1,976

31 NE

Good

Over: ARBUCKLE DRAW

31 NE .4 East of Pinto, Grant, WA

Built 1994 Load: 31.4 t ADT: 65

L RD SW

Good

Over: SADDLE MOUNTAIN WASTEWAY

L SW .9 S of 24, Grant, WA

Built 1969 Load: 31.8 t ADT: 783

20 ROAD NW

Good

Over: WEST CANAL BLK 701

20 & A.5 NW, Grant, WA

Built 1987 Load: 31.8 t ADT: 444

M RD SW

Good

Over: WAHLUKE BRANCH CANAL

M SW 1.4 N of 24 SW, Grant, WA

Built 1969 Load: 31.8 t ADT: 157

Q RD NE

Good

Over: EAST LOW CANAL

Q NE .6 North of I-90, Grant, WA

Built 1992 Load: 31.8 t ADT: 439

FARM ACCESS

Good

Over: WEST CANAL, LATERAL W26C

WEST CANAL LATERAL W26C,, Grant, WA

Built 2016 Load: 32.0 t ADT: 30

3 SE

Good

Over: LIND COULEE

3 SE 0.1 East of S SE, Grant, WA

Built 1966 Load: 32.1 t ADT: 179

0.5 'SW' ROAD

Good

Over: PRIEST RAPIDS LATERAL

NR MATTAWA, WA, Grant, WA

Built 1983 Load: 32.4 t ADT: 20

18 NE

Good

Over: EAST LOW CANAL

18 NE 1.5 W of Stratford, Grant, WA

Built 1998 Load: 32.4 t ADT: 103

MAINTENANCE ROAD

Good

Over: DW231 WASTEWAY

DW231 WASTEWAY, STATION 5, Grant, WA

Built 2015 Load: 32.6 t ADT: 10

U.7

Good

Over: USBR Lateral

U.7 .2 N of SR 28, Grant, WA

Built 1954 Load: 32.7 t ADT: 278

S RD NE

Good

Over: EAST LOW CANAL

S NE 0.1 North of I-90, Grant, WA

Built 1995 Load: 32.7 t ADT: 133

P NW

Good

Over: LAT. BLK 73

P NW @ 12, Grant, WA

Built 1996 Load: 32.7 t ADT: 440

4 SE

Good

Over: Irrigation Drainage

4 SE 0.35 East of M SE, Grant, WA

Built 2008 Load: 33.0 t ADT: 106

I RD SW

Good

Over: SADDLE MOUNTAIN WASTEWAY

I SW 1.0 S of 24, Grant, WA

Built 1969 Load: 33.4 t ADT: 115

R RD SE

Good

Over: Lind Coulee

R SE .1 mile S of 3 SE, Grant, WA

Built 1966 Load: 33.4 t ADT: 436

WHITETRAIL RD

Good

Over: WEST CANAL BLK 75

5 NW 1.1 W of R, Grant, WA

Built 1997 Load: 33.4 t ADT: 5,128

J RD SW

Good

Over: IRRIGATION LATERAL

J SW 0.7 North of 10 SW, Grant, WA

Built 1964 Load: 33.7 t ADT: 65

Farm Access/Maint.

Good

Over: West Canal DW229 Waste

West Canal DW229 Wasteway, Grant, WA

Built 2010 Load: 34.1 t ADT: 10

Farm Access

Good

Over: West Canal W26C lateral

West Canal W26C Lateral a, Grant, WA

Built 2000 Load: 34.3 t ADT: 50

Cresent Bar Rd

Good

Over: Wanapum Lake

Cresent Bar, Grant, WA

Built 2008 Load: 34.3 t ADT: 1,147

2 RD SE

Good

Over: IRRIGATION WASTEWAY

2 SE .2 West of M SE, Grant, WA

Built 1995 Load: 34.7 t ADT: 49

W RD SE

Good

Over: EAST LOW CANAL

W SE 0.1 S of 8.5 SE, Grant, WA

Built 2005 Load: 35.0 t ADT: 39

R RD NW

Good

Over: IRRIGATION LATERAL

R NW 0.1 North of 7 NW, Grant, WA

Built 1951 Load: 35.4 t ADT: 158

MONUMENT HILL ROAD

Good

Over: IRRIGATION CANAL

P NW 0.6 North of 12 NW, Grant, WA

Built 1996 Load: 35.6 t ADT: 298

G RD SW

Good

Over: WEST CANAL

G SW .2 North of 10 SW, Grant, WA

Built 2006 Load: 35.6 t ADT: 511

W NW

Good

Over: BNSF RAILROAD

W NW .28 W OF BAIRD SPGS, Grant, WA

Built 2016 Load: 35.6 t ADT: 49

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.