Okanogan County, WA

163 public highway bridges

Okanogan County Bridge Snapshot

Okanogan County, Washington contains 163 public highway bridges in the FHWA National Bridge Inventory. Roughly 46% are rated “Good,” 44.8% “Fair,” 7.4% “Poor,” and 7.4% 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.

163

Total Bridges

46%

Good

7.4%

Poor

7.4%

Structurally Deficient

Condition Distribution

Good

46% (75)

Fair

44.8% (73)

Poor

7.4% (12)

SD

7.4% (12)

All Bridges (163)

Sort:

GN RY

Over: US 97

6.1 N JCT SR 153, Okanogan, WA

Built 1939 ADT: 6,821

GN RY

Over: US ROUTE 97

0.2 N JCT SR 173, Okanogan, WA

Built 1948 ADT: 8,989

US 97

Over: SR 155

51.2 N DOUGLAS CO, Okanogan, WA

Built 1964 ADT: 4,683

SR 153

Over: METHOW RIVER

18.9 N JCT US 97, Okanogan, WA

Built 1939 Load: 13.3 t ADT: 1,363

FAS ROUTE U243

Over: SIMILKAMEEN RIVER

.NESWS28T40NR27E, Okanogan, WA

Built 1950 Load: 13.3 t ADT: 985

COUNTY ROAD 2361

Over: SALMON CREEK

0.1 MI N JCT.4015, Okanogan, WA

Built 1976 Load: 14.3 t ADT: 235

COUNTY ROAD 3797

Over: TUNK CREEK

4.7 MI.N.RIVERSIDE, Okanogan, WA

Built 1973 Load: 16.2 t ADT: 76

SR 20

Over: METHOW RIVER

22.1 E CHELAN CO, Okanogan, WA

Built 1984 Load: 17.2 t ADT: 1,584

SR 20

Over: BONAPARTE CREEK

0.9 E JCT US 97, Okanogan, WA

Built 1933 Load: 17.8 t ADT: 1,780

SR 153

Over: METHOW RIVER

22.3 N JCT US 97, Okanogan, WA

Built 1935 Load: 18.1 t ADT: 1,363

COUNTY ROAD 9221

Over: SALMON CREEK

12.1 MI NW OKANOGAN, Okanogan, WA

Built 1969 Load: 18.1 t ADT: 20

SR 153

Over: METHOW RIVER

16.9 N JCT US 97, Okanogan, WA

Built 1939 Load: 18.8 t ADT: 1,363

IRR BIA RTE 74

Over: LITTLE NESPELEM RIVER

4.8 KM E OF COLVILLE AGCY, Okanogan, WA

Built 1994 Load: 19.1 t ADT: 20

IRR BIA RTE 74

Over: LITTLE NESPELEM RIVER

8.1 KM E OF COLVILLE AGCY, Okanogan, WA

Built 1994 Load: 19.1 t ADT: 10

COUNTY ROAD 9155

Over: CHILIWIST CREEK

01.8 MI.S.MALOTT, Okanogan, WA

Built 1944 Load: 19.4 t ADT: 1,352

COUNTY ROAD 2017

Over: W.FORK SALMON CREEK

02.23 MI W JCT 9229, Okanogan, WA

Built 1949 Load: 20.4 t ADT: 72

LAKE STREET

Over: SALMON CREEK

0.02 MI E MAIN ST, Okanogan, WA

Built 1973 Load: 20.4 t ADT: 260

HARTS PASS ROAD

Over: ROBINSON CREEK

1.73 MI UP RD #5400, Okanogan, WA

Built 1955 Load: 20.9 t ADT: 112

FAS ROUTE V242

Over: SINLAHEKIN CREEK

2.3 MI.N.LOOMIS, Okanogan, WA

Built 1966 Load: 21.1 t ADT: 114

OCR 3683

Over: MILL CREEK

1.29 NO.JCT.SR155, Okanogan, WA

Built 1958 Load: 21.4 t ADT: 92

FAS ROUTE F241

Over: SALMON CREEK

.SESWS6T35NR25E, Okanogan, WA

Built 1949 Load: 21.4 t ADT: 983

OCR 3683

Over: SMITH CREEK

0.72 NO.JCT.SR155, Okanogan, WA

Built 1958 Load: 21.4 t ADT: 92

FAS ROUTE 9221

Over: COUNTY ROAD 9221

.NW SE S4,T34,R25, Okanogan, WA

Built 1969 Load: 21.7 t ADT: 61

SR 153

Over: METHOW RIVER

4.3 N JCT US 97, Okanogan, WA

Built 1950 Load: 21.8 t ADT: 1,621

US 97

Over: OKANOGAN R & RR

18.3 N JCT SR 215, Okanogan, WA

Built 1957 Load: 21.8 t ADT: 4,552

COUNTY ROAD 1090

Over: TWISP RIVER

10.9 W.SR20 @ TWISP, Okanogan, WA

Built 1959 Load: 21.8 t ADT: 52

SR 153

Over: BLACK CANYON CREEK

6.6 N JCT US 97, Okanogan, WA

Built 1949 Load: 22.0 t ADT: 1,621

FOGGY DEW RD

Over: NORTH FK GOLD CREEK

NO DATA ENTERED, Okanogan, WA

Built 1949 Load: 22.7 t ADT: 37

BROADWAY STREET

Over: NORTH FORK CREEK

0.02 E OF MAIN ST., Okanogan, WA

Built 1982 Load: 23.0 t ADT: 50

CHEWACK RD

Over: LAKE CREEK

NO DATA ENTERED, Okanogan, WA

Built 1956 Load: 23.6 t ADT: 24

FIRST AVENUE

Over: SALMON CREEK

.3 MI S OF OAK ST, Okanogan, WA

Built 1970 Load: 23.7 t ADT: 260

COUNTY ROAD 4015

Over: SINLAHEKIN CREEK

3.1 S.9425@ LOOMIS, Okanogan, WA

Built 1973 Load: 24.0 t ADT: 56

SALMON/BOULDER RD

Over: NORTH FORK BOULDER CREEK

NO DATA ENTERED, Okanogan, WA

Built 1949 Load: 24.1 t ADT: 158

COUNTY ROAD 4723

Over: NINE MILE CREEK

NENWS15T40NR27E, Okanogan, WA

Built 1980 Load: 24.3 t ADT: 34

SILVER ST

Over: NORTH FORK SALMON CR

0.1 E MAIN ST, Okanogan, WA

Built 1997 Load: 24.3 t ADT: 50

IRR BIA RTE 56

Over: NORTH STAR CREEK

16 KM NORTH OF NESPELEM, Okanogan, WA

Built 1962 Load: 24.5 t ADT: 25

IRR BIA RTE 64

Over: WEST FORK SAN POIL RIVER

13 KM SW OF REPUBLIC, Okanogan, WA

Built 1962 Load: 24.5 t ADT: 75

IRR BIA RTE 6

Over: GOLD CREEK

21 KM SW OF REPUBLIC, Okanogan, WA

Built 1962 Load: 24.5 t ADT: 25

IRR BIA RTE 62

Over: GOLD CREEK

23 KM SW OF REPUBLIC, Okanogan, WA

Built 1962 Load: 24.5 t ADT: 25

IRR BIA RTE 1167

Over: NESPELEM RIVER

0.6 KM WEST OF AGENCY, Okanogan, WA

Built 1957 Load: 24.5 t ADT: 250

COUNTY ROAD 9140

Over: GATE CREEK

.NWSWS10T36NR19E, Okanogan, WA

Built 1971 Load: 24.6 t ADT: 488

SR 155 SPUR

Over: OKANOGAN RIVER

0.2 W JCT SR 155, Okanogan, WA

Built 1923 Load: 24.9 t ADT: 5,801

MID SALMON/BOULDER

Over: N. FK BOULDER CR

NO DATA ENTERED, Okanogan, WA

Built 1960 Load: 25.1 t ADT: 35

US 97

Over: OKANOGAN RIVER

15.6 N JCT SR 20, Okanogan, WA

Built 1951 Load: 25.4 t ADT: 3,220

FIFTH AVENUE

Over: SALMON CREEK

.07 S OF TYEE ST, Okanogan, WA

Built 1970 Load: 25.6 t ADT: 260

SALMON MEADOWS RD

Over: N.FORK SALMON CREEK

NO DATA ENTERED, Okanogan, WA

Built 1949 Load: 26.3 t ADT: 76

COUNTY ROAD 9221

Over: SALMON CREEK

12.7 MI NW OKANOGAN, Okanogan, WA

Built 1969 Load: 27.2 t ADT: 20

FAS ROUTE T242

Over: OKANOGAN RIVER

.SENWS14T38NR27E, Okanogan, WA

Built 1961 Load: 27.5 t ADT: 848

FAS ROUTE L242

Over: LOST RIVER

.NESE S25,T36,R19, Okanogan, WA

Built 1972 Load: 27.5 t ADT: 1,057

BONAPARTE AVE.

Over: BONAPARTE CREEK

0.1 S.SEVENTH ST., Okanogan, WA

Built 1972 Load: 27.9 t ADT: 100

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

Related

Browse all → | Rankings →

Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026