Total bridges
177
Public highway bridges in Washington County
County profile · official public datasets
Washington County, UT
177 public highway bridges tracked in the FHWA National Bridge Inventory: 20.3% rated Good, 78.5% Fair, 1.1% Poor.
- 177
- Public bridges
- 20.3%
- Good condition
- 1.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Washington County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 38%
- lowest Poor share in state
- 1.1%
- Poor-condition share
- 177
- public highway bridges
- 1987
- avg year built
Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.
Washington County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Washington County ranks #11 of 29 Utah counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.1%). Washington County, Utah contains 177 public highway bridges. Roughly 20.3% are rated “Good,” 78.5% “Fair,” and 1.1% “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.
Good condition
20.3%
36 of 177 rated 7-9
Fair condition
78.5%
139 of 177 rated 5-6
Poor condition
1.1%
2 of 177 rated 4 or below
In-state Poor-share rank
#11 of 29
Among Utah counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 177 NBI-tracked bridges by lowest applicable component rating.
Good 20.3% (36)
Fair 78.5% (139)
Poor 1.1% (2)
Washington County's Poor-condition bridges carry 15,637 vehicle crossings a day
That is 0.6% of the county's reported daily bridge traffic on 1.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 7,819 crossings a day against 21,889 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.
Computed over the 168 of 177 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
37.3% of Washington County's bridges have passed the 50-year mark
66 of the 177 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 20.3% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.
Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.
One structure carries 99.7% of the county's Poor-condition bridge traffic
FOREMASTER DRIVE over RIM ROCK WASH, built 1998, carries 15,587 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 2-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 15,637 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Washington County's bridges were built
177 bridges with a recorded construction year, grouped by decade
- 1920s 6
1920–1929
6 bridges
- 1930s 8
1930–1939
8 bridges
- 1940s 1
1940–1949
1 bridges
- 1950s
1950–1959
19 bridges
- 1960s
1960–1969
17 bridges
- 1970s
1970–1979
17 bridges
- 1980s 10
1980–1989
10 bridges
- 1990s
1990–1999
21 bridges
- 2000s
2000–2009
33 bridges
- 2010s
2010–2019
36 bridges
- 2020s 9
2020–2029
9 bridges
What this shows Construction peaked in the 2010s, when 36 of the county's bridges still in the inventory were built, which is 20.3% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year (1987) matches the Utah average (1984).
How Washington County compares with Utah's closest counties by inventory size
The 5 Utah counties nearest Washington County in number of bridges, with their condition splits. Its 1.1% Poor share is the 3rd-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1983 is in line with the group.
Showing the 5 closest of 28 Utah counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Box Elder County | 184 | 23.4% | 70.7% | 6% | 1977 |
| Washington County (this page) | 177 | 20.3% | 78.5% | 1.1% | 1987 |
| Sevier County | 157 | 19.1% | 80.3% | 0.6% | 1983 |
| Davis County | 139 | 28.8% | 70.5% | 0.7% | 1996 |
| Summit County | 138 | 14.5% | 81.2% | 4.3% | 1982 |
| Weber County | 129 | 14.7% | 80.6% | 4.7% | 1979 |
Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Washington County's. Source: FHWA National Bridge Inventory, 2024 release.
Nationwide counties with similar inventory size or average build year
Two NBI-derived peer sets for Washington County, both outside Utah so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside UT (177 bridges here).
- Hale County, AL · 177 bridges
- Macon County, AL · 177 bridges
- Washington County, AL · 177 bridges
- Seminole County, FL · 177 bridges
Similar average build year
Nearest mean year-built outside UT (1987 here).
- St. Louis County, MO · avg 1987 · 912 bridges
- Ellis County, TX · avg 1987 · 691 bridges
- St. Louis County, MN · avg 1987 · 663 bridges
- Palm Beach County, FL · avg 1987 · 610 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (139)
TOWN ROAD
FairOver: UNKNOWN NAME CANAL
ENTRADA DR. E. OF VIRGIN, Washington, UT
Built 2006 Load: 0.0 t ADT: 100
SNOW CYN. PARKWAY
FairOver: SAND HOLLOW WASH
NORTH SIDE OF ST. GEORGE, Washington, UT
Built 1999 Load: 0.0 t ADT: 7,670
BUENA VISTA BLVD.
FairOver: MILL CREEK
NW SIDE OF WASHINGTON, Washington, UT
Built 1999 Load: 0.0 t ADT: 1,003
I-15 (SR-15)NB SB
FairOver: ASH CREEK RES. SPILLWAY
0.5 MI.NO.BLACK RIDGE INT, Washington, UT
Built 1960 Load: 0.0 t ADT: 32,500
I-15 (SR-15) SBL
FairOver: COTTONWOOD CREEK
3 MI NO HARRISBURG INTER, Washington, UT
Built 1963 Load: 0.0 t
GATES LANE
FairOver: SANTA CLARA RIVER
SUNRIDGE SUBD.SANTA CLARA, Washington, UT
Built 2008 Load: 0.3 t ADT: 500
FOREST ROAD #30009
FairOver: DRY WASH
4.7 MI EAST OF PINTO, Washington, UT
Built 2014 Load: 14.6 t ADT: 28
DIXIE DR. INT.X-RD
FairOver: I-15 (SR-15)
At the Dixie Drive Intchg, Washington, UT
Built 2012 Load: 16.2 t ADT: 1,390
COUNTY ROAD
FairOver: DRY FORK CREEK
1 MILE SOUTH OF PINTURA, Washington, UT
Built 1930 Load: 16.8 t ADT: 63
FT. PIERCE DRIVE
FairOver: FT. PIERCE WASH
SO. END BLOOMINGTON HILLS, Washington, UT
Built 1993 Load: 17.5 t ADT: 8,729
BRIDGE STREET
FairOver: VIRGIN RIVER
SOUTH SIDE OF ROCKVILLE, Washington, UT
Built 1924 Load: 17.8 t ADT: 123
ZION CANYON SCENIC
FairOver: CABLE CREEK
FROM SOUTH ENTRANCE GO 1, Washington, UT
Built 1932 Load: 18.1 t ADT: 1,341
ADMINISTRATIVE ACC
FairOver: OAK CREEK
FROM SOUTH ENTRANCE GO 0, Washington, UT
Built 1926 Load: 19.0 t ADT: 50
MAN-O-WAR STREET
FairOver: VIRGIN RIVER
IN BLOOMINGTON, Washington, UT
Built 1969 Load: 19.1 t ADT: 10,327
I-15 (SR-15) SBL
FairOver: PARK ROAD-INTER X-ROAD
KOLOB CANYON INTERCHANGE, Washington, UT
Built 1959 Load: 19.1 t
I-15 (SR-15) NBL
FairOver: 700 S. Street
850 E 700 S in St. George, Washington, UT
Built 1972 Load: 19.4 t ADT: 51,695
I-15 (SR-15) SBL
FairOver: NEW HARMONY RD. INT.X-RD
NEW HARMONY INTERCHANGE, Washington, UT
Built 1959 Load: 19.4 t
I-15 (SR-15) SBL
FairOver: 700 SOUTH STREET
850 E.700 SO.IN ST.GEORGE, Washington, UT
Built 1972 Load: 19.4 t ADT: 51,695
SR-34 INT.X-ROAD
FairOver: I-15 (SR-15) NBL & S
EAST ST. GEORGE INTCHANGE, Washington, UT
Built 1972 Load: 20.4 t ADT: 54,703
I-15 (SR-15) NBL
FairOver: WASHINGTON MAIN STREET
1.1 MI.NO.WASHINGTON INT, Washington, UT
Built 1964 Load: 20.7 t ADT: 64,174
FOREST ROAD #30011
FairOver: PINTO CREEK
BETWEEN PINTO AND NEW CAS, Washington, UT
Built 1959 Load: 20.7 t ADT: 50
HURRICANE CITY ST.
FairOver: GOULDS WASH
410 SOUTH 700 WEST STREET, Washington, UT
Built 1970 Load: 21.1 t ADT: 2,282
SR-9
FairOver: VIRGIN RIVER
.3 MILE NO. of HURRICANE, Washington, UT
Built 1937 Load: 21.1 t ADT: 18,747
SR-9
FairOver: SPRINGDALE WASH
IN SPRINGDALE, Washington, UT
Built 1926 Load: 21.1 t ADT: 7,100
SR-59
FairOver: GOULD'S WASH
9 MILES SO. OF HURRICANE, Washington, UT
Built 1962 Load: 21.4 t ADT: 5,567
SR-219
FairOver: Shoal Creek
W.END MAIN ST.ENTERPRISE, Washington, UT
Built 1970 Load: 21.4 t ADT: 4,108
ZION - MOUNT CARME
FairOver: PINE CREEK
FROM SOUTH ENTRANCE GO 1, Washington, UT
Built 1929 Load: 21.8 t ADT: 1,787
DIXIE DRIVE
FairOver: SANTA CLARA RIVER
SE. SIDE OF ST. GEORGE, Washington, UT
Built 1981 Load: 22.0 t ADT: 21,589
COUNTY ROAD
FairOver: SANTA CLARA RIVER
9.7 MILES W.OF ST. GEORGE, Washington, UT
Built 1931 Load: 22.4 t ADT: 2,389
I-15 (SR-15) NBL
FairOver: 100 SOUTH STREET
1150 E.100 S.IN ST.GEORGE, Washington, UT
Built 1972 Load: 23.0 t ADT: 51,695
FOREST ROAD #30032
FairOver: LEEDS CREEK
NO DATA ENTERED, Washington, UT
Built 1967 Load: 23.0 t ADT: 42
ZIONS PARKWAY
FairOver: LaVERKIN CREEK
SOUTH OF TOQUERVILLE, Washington, UT
Built 2008 Load: 23.7 t ADT: 126
I-15 (SR-15) SBL
FairOver: 100 SOUTH STREET
1150 E.100 S.in ST.GEORGE, Washington, UT
Built 1972 Load: 23.7 t ADT: 51,695
I-15 (SR-15)NB&
FairOver: SOUTH ASH CREEK
3.6 MI.NO.ANDERSON R.INT., Washington, UT
Built 1959 Load: 24.0 t ADT: 32,923
HURRICANE CITY RD.
FairOver: LEEDS CREEK
HARRISBERG RESORT, Washington, UT
Built 1931 Load: 24.3 t ADT: 504
SR-9
FairOver: BLACK CANYON WASH
IN SPRINGDALE, Washington, UT
Built 1963 Load: 25.6 t ADT: 7,100
FSR #30006
FairOver: COVE CREEK
11 MI NW OF VEYO, Washington, UT
Built 1970 Load: 25.6 t ADT: 50
FOREST ROAD #30032
FairOver: LEEDS CREEK
NO DATA ENTERED, Washington, UT
Built 1972 Load: 25.9 t ADT: 50
I-15 (SR-15) NBL
FairOver: CO. RD. TO BLOOMINGTON
BLOOMINGTON INTERCHANGE, Washington, UT
Built 1972 Load: 26.2 t ADT: 64,119
FOREST ROAD #30032
FairOver: LEEDS CREEK
NO DATA ENTERED, Washington, UT
Built 1972 Load: 26.6 t ADT: 50
SR-9
FairOver: NORTH CREEK
0.8 MILE EAST OF VIRGIN, Washington, UT
Built 1984 Load: 26.9 t ADT: 2,381
COUNTY ROAD
FairOver: NORTH CREEK
4.5 MILES NW. OF VIRGIN, Washington, UT
Built 1972 Load: 27.2 t ADT: 77
I-15 (SR-15) NBL
FairOver: HARRISBURG CREEK
4.3 MI.NO.HARRISBURG INT., Washington, UT
Built 1956 Load: 27.2 t ADT: 30,540
I-15 (SR-15) SBL
FairOver: INT. RD. to BLOOMINGTON
BLOOMINGTON INTERCHANGE, Washington, UT
Built 1972 Load: 27.5 t ADT: 64,119
I-15 (SR-15) SBL
FairOver: ATKINSVILLE WASH
3 MI.SO.BLOOMINGTON INT., Washington, UT
Built 1971 Load: 27.9 t
COUNTY ROAD
FairOver: ASH CREEK
WEST OF ASH CREEK RES., Washington, UT
Built 1925 Load: 28.2 t ADT: 493
RIVERSIDE DRIVE
FairOver: MIDDLETON WASH
EAST SIDE OF ST. GEORGE, Washington, UT
Built 1999 Load: 28.5 t ADT: 14,605
OLD CHURCH ROAD
FairOver: NASH CREEK
NW. SIDE OF TOQUERVILLE, Washington, UT
Built 2006 Load: 28.8 t ADT: 126
LOCAL ROAD
FairOver: MIDDLETON WASH
WEST OF 270 S. MALL DR., Washington, UT
Built 2013 Load: 29.2 t ADT: 200
HURRICANE CITY ST.
FairOver: GOULDS WASH
450 SOUTH 400 WEST STREET, Washington, UT
Built 1980 Load: 29.5 t ADT: 630
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.