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)

MAINTENANCE ROAD

Good

Over: ROCKY COULEE WASTEWAY

ROCKY COULEE WASTEWAY, Grant, WA

Built 1949 Load: 36.0 t ADT: 15

Wheeler Rd

Good

Over: East Low Canal

3 NE 0.1 East of O NE, Grant, WA

Built 2010 Load: 37.6 t ADT: 1,109

Vantage Rd

Good

Over: FRENCHMAN SPRINGS

Vantage Rd .9 W Silica, Grant, WA

Built 1931 Load: 37.9 t ADT: 169

SR 243

Good

Over: LOWER CRAB CR

19.6 N JCT SR 24, Grant, WA

Built 1970 Load: 38.1 t ADT: 5,987

Cannawai Valley Rd

Good

Over: Cannawai Creek

2.43 E of Wilson Creek, Grant, WA

Built 2007 Load: 38.6 t ADT: 15

Q - NW

Good

Over: IRRIGATION CANAL

Q NW .1 N of 11, Grant, WA

Built 2003 Load: 38.9 t ADT: 392

I-90

Good

Over: SILICA RD

6.1 E JCT SR 26, Grant, WA

Built 1981 Load: 39.0 t ADT: 7,785

I-90

Good

Over: SILICA RD

6.1 E JCT SR 26, Grant, WA

Built 1982 Load: 39.0 t ADT: 7,785

S NW

Good

Over: IRRIGATION CANAL

S NW .4 S of SR 28, Grant, WA

Built 2004 Load: 39.2 t ADT: 663

9-NW

Good

Over: W 22 CANAL

9 NW 0.2 East of A NW, Grant, WA

Built 2003 Load: 39.5 t ADT: 75

Sand Dunes Rd

Good

Over: Moses Lake

Sand Dunes .6 S of Camas, Grant, WA

Built 2015 Load: 39.5 t ADT: 412

I-90

Good

Over: ROAD O NE

3.4 E JCT SR 17, Grant, WA

Built 1965 Load: 40.8 t ADT: 6,163

I-90

Good

Over: ROAD O NE

3.4 E JCT SR 17, Grant, WA

Built 1965 Load: 40.8 t ADT: 6,163

SR 28

Good

Over: CRAB CREEK

15.9 E JCT SR 17, Grant, WA

Built 1988 Load: 40.8 t ADT: 580

US 2

Good

Over: SOUTH COULEE DAM

27.4 E JCT SR 172, Grant, WA

Built 1984 Load: 40.8 t ADT: 1,935

3 RD NW

Good

Over: WEST CANAL

3 NW 1 West of SR 281, Grant, WA

Built 2002 Load: 40.8 t ADT: 96

F ROAD NE

Good

Over: MAIN CANAL

F NE .43 mile N of 23, Grant, WA

Built 2008 Load: 41.5 t ADT: 18

SR 262

Good

Over: LAT. WG1J BLK 80

4.9 N JCT SR 26, Grant, WA

Built 1990 Load: 41.7 t ADT: 745

12 RD NE

Good

Over: EAST LOW CANAL

12 NE 2.2 E of J NE, Grant, WA

Built 2002 Load: 41.8 t ADT: 97

A-NW

Good

Over: W 22 CANAL

A NW 1.4 N of 9 NW, Grant, WA

Built 2003 Load: 41.8 t ADT: 467

Martin Road

Good

Over: Wasteway

Martin road at Adams, Grant, WA

Built 2017 Load: 42.8 t ADT: 188

SR 155

Good

Over: LOWER LEWIS CR

8.8 N JCT US 2, Grant, WA

Built 1949 Load: 43.5 t ADT: 959

MAINTENANCE ROAD

Good

Over: WEST CANAL

WEST CANAL LATERAL W26C,, Grant, WA

Built 1951 Load: 43.7 t ADT: 5

W-NE

Good

Over: BLACKROCK COULEE

W NE 0.2 S of 16, Grant, WA

Built 2003 Load: 43.7 t ADT: 235

HEADWORKS MAINTENA

Good

Over: CRAB CREEK SIPHON NO. 1

Crab Ck Siphon No. 1 Inle, Grant, WA

Built 1947 Load: 43.8 t ADT: 10

Canal Maintenance

Good

Over: East Low Canal - Crab Ck

Crab Ck Siphon No.1 Outle, Grant, WA

Built 1947 Load: 43.8 t ADT: 5

Canal Maintenance

Good

Over: East Low Canal - Brkn Rk

Broken Rock Siphon No.1 I, Grant, WA

Built 1947 Load: 43.8 t ADT: 2

Vantage Rd

Good

Over: FRENCHMAN SPRINGS

Vantage Rd 1.1 W Silica, Grant, WA

Built 1931 Load: 44.7 t ADT: 169

Adams road

Good

Over: Lateral. Block 73

Adams road at Martin, Grant, WA

Built 2017 Load: 45.0 t ADT: 247

SR 170

Good

Over: EAST LOW CANAL

2.4 E JCT SR 17, Grant, WA

Built 1980 Load: 46.3 t ADT: 2,802

WAHATIS PEAK ROAD

Good

Over: WAHLUKE BRANCH CANAL

NR MATTAWA, WA, Grant, WA

Built 1967 Load: 48.3 t ADT: 3

MAINTENANCE ROAD

Good

Over: WEST CANAL

Dry Coulee Siphon 2 Inlet, Grant, WA

Built 1946 Load: 50.7 t ADT: 5

Adams Rd

Good

Over: Lateral block 73

Adams at 11.5 NW, Grant, WA

Built 2017 Load: 52.8 t ADT: 589

11 N.W.

Good

Over: Wasteway

11 NW @ M NW, Grant, WA

Built 2017 Load: 53.8 t ADT: 232

S NE

Good

Over: Dry Coulee

S NE 1.0 S of 39 NE, Grant, WA

Built 2005 Load: 55.7 t ADT: 91

"39" Road NE

Good

Over: Field Runoff

39 NE .01 E of R NE, Grant, WA

Built 2010 Load: 56.1 t ADT: 49

US 2

Good

Over: DRY FALLS DAM

2.1 E DOUGLAS CO, Grant, WA

Built 1984 Load: 56.2 t ADT: 1,935

Maintenance Road

Good

Over: East Low Canal

Weber Branch Siphon, Grant, WA

Built 1950 Load: 56.8 t ADT: 1

East Low Canal

Good

Over: East Low Canal

Weber Coulee Siphon Outle, Grant, WA

Built 1950 Load: 56.8 t ADT: 1

Stratford Rd

Good

Over: Crab Creek

.25 S of Hwy 28, Grant, WA

Built 2017 Load: 59.6 t ADT: 778

MORGAN LAKE ROAD

Good

Over: POTHOLES CANAL

11.5 MI NNW OF OFFICE, Grant, WA

Built 2002 Load: 61.7 t ADT: 150

"R" Road NE

Good

Over: Field Runoff

R NE 0.5 North of 37, Grant, WA

Built 2010 Load: 64.5 t ADT: 156

BAIRD SPRINGS RD

Good

Over: Trinidad Creek

Baird Spring 1.7 N SR 28, Grant, WA

Built 2005 Load: 71.0 t ADT: 26

"R" Road NE

Good

Over: Field Runoff

R NE 0.1 North of 29 NE, Grant, WA

Built 2012 Load: 82.3 t ADT: 265

W-NE

Good

Over: NORTHUP CREEK

0.1S GR COULEE HILL RD, Grant, WA

Built 1985 Load: 88.8 t ADT: 56

SR 262

Good

Over: POTHOLES CANAL

17.5 N JCT SR 26, Grant, WA

Built 1949 Load: 89.8 t ADT: 1,559

Canal Maintenance

Good

Over: East Low Canal - Crab Ck

Crab Ck Siphon No.2 Inlet, Grant, WA

Built 1947 Load: 90.7 t ADT: 5

Canal Maintenance

Good

Over: East Low Canal - Crab Ck

Crab Ck Siphon No.2 Outle, Grant, WA

Built 1947 Load: 90.7 t ADT: 5

Canal Maintenance

Good

Over: East Low Canal - Brkn Rk

Broken Rock Siphon No.2 O, Grant, WA

Built 1947 Load: 90.7 t ADT: 1

MAINTENANCE ROAD

Good

Over: MAIN CANAL

MAIN CANAL 3.88, Grant, WA

Built 1977 Load: 91.5 t ADT: 10

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.