Grant County, WA

314 public highway bridges

Grant County Bridge Snapshot

Grant County, Washington contains 314 public highway bridges in the FHWA National Bridge Inventory. Roughly 60.5% are rated “Good,” 30.3% “Fair,” 1.6% “Poor,” and 1.6% 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 WA 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.

314
Total Bridges
60.5%
Good
1.6%
Poor
1.6%
Structurally Deficient

Condition Distribution

Good
60.5% (190)
Fair
30.3% (95)
Poor
1.6% (5)
SD
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 U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial