County profile · official public datasets

Rich County, UT

20 public highway bridges tracked in the FHWA National Bridge Inventory: 15% rated Good, 70% Fair, 15% Poor.

20
Public bridges
15%
Good condition
15%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Rich County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

29th
of 29 on Poor share
15%
Poor-condition share
20
public highway bridges
1955
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.

Rich County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Rich County ranks #29 of 29 Utah counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 15%). Rich County, Utah contains 20 public highway bridges. Roughly 15% are rated “Good,” 70% “Fair,” and 15% “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.

Total bridges

20

Public highway bridges in Rich County

Good condition

15%

3 of 20 rated 7-9

Fair condition

70%

14 of 20 rated 5-6

Poor condition

15%

3 of 20 rated 4 or below

In-state Poor-share rank

#29 of 29

Among Utah counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 20 NBI-tracked bridges by lowest applicable component rating.

Good
15% (3)
Fair
70% (14)
Poor
15% (3)

Rich County's Poor-condition bridges carry 324 vehicle crossings a day

That is 2.1% of the county's reported daily bridge traffic on 15% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 108 crossings a day against 418 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 20 of 20 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

75% of Rich County's bridges have passed the 50-year mark

15 of the 20 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 15% 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 68.8% of the county's Poor-condition bridge traffic

COUNTY ROAD over BEAR RIVER, built 1947, carries 223 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 3-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 324 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Rich County's bridges were built

20 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1930s, when 6 of the county's bridges still in the inventory were built, which is 30% of those with a recorded year. That cohort is now 85 to 94 years old in the 2024 inventory. Its average build year is 1955, 29 years older than the Utah average of 1984.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Rich County compares with Utah's closest counties by inventory size

The 5 Utah counties nearest Rich County in number of bridges, with their condition splits. Its 15% Poor share is the 6th-lowest of these 6. Its average build year of 1955 against a peer-group mean of 1981 is 26 years older.

Showing the 5 closest of 28 Utah counties eligible for comparison.

Bridge inventory size and condition shares for Rich County and the 5 Utah counties closest to it in inventory size
County Bridges Poor
Wasatch County 32 3.1%
Kane County 29 0%
Wayne County 29 10.3%
Rich County (this page) 20 15%
Piute County 19 0%
Daggett County 13 0%

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 Rich 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 Rich County, both outside Utah so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside UT (20 bridges here).

Similar average build year

Nearest mean year-built outside UT (1955 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 20 Good 3 Fair 14 Poor 3

All bridges (20)

SR-16

Fair

Over: WOODRUFF-RANDOLPH CANAL

5.4 MI SO SAGE CREEK JCT, Rich, UT

Built 1935 Load: 8.1 t ADT: 3,051

COUNTY ROAD

Fair

Over: WOODRUFF CREEK

8 MILES SW. OF WOODRUFF, Rich, UT

Built 1972 Load: 10.4 t ADT: 19

COUNTY ROAD

Fair

Over: WOODRUFF-RANDOLPH CANAL

4 MILES SOUTH OF RANDOLPH, Rich, UT

Built 1952 Load: 11.3 t ADT: 26

COUNTY ROAD

Fair

Over: BECKWITH CANAL

9 MILES NE. OF RANDOLPH, Rich, UT

Built 1950 Load: 11.7 t ADT: 38

COUNTY ROAD

Fair

Over: BEAR RIVER

2 MILES EAST OF RANDOLPH, Rich, UT

Built 1914 Load: 17.8 t ADT: 38

SR-16

Fair

Over: WOODRUFF-RANDOLPH CANAL

3 MILES SOUTH OF RANDOLPH, Rich, UT

Built 1934 Load: 17.8 t ADT: 1,961

SR-30

Fair

Over: BEAR RIVER

1.4 MI.WEST OF WYO LINE, Rich, UT

Built 1941 Load: 21.7 t ADT: 983

COUNTY ROAD

Fair

Over: BEAR RIVER

6 MILES SE. OF RANDOLPH, Rich, UT

Built 1917 Load: 24.0 t ADT: 45

SR-16

Fair

Over: SALARATUS CREEK

2.9 MI.SOUTH OF WOODRUFF, Rich, UT

Built 1957 Load: 25.9 t ADT: 1,648

SR-16

Fair

Over: BIG CREEK

.8 MILE SOUTH OF RANDOLPH, Rich, UT

Built 1934 Load: 26.6 t ADT: 1,961

COUNTY ROAD

Fair

Over: BEAR RIVER

2 MILES EAST OF WOODRUFF, Rich, UT

Built 2009 Load: 31.1 t ADT: 48

SR-16

Fair

Over: Genes Creek

WITHIN WOODRUFF, Rich, UT

Built 1935 Load: 33.0 t ADT: 1,943

SR-16

Fair

Over: WOODRUFF-RANDOLPH CANAL

SOUTH END OF RANDOLPH, Rich, UT

Built 1934 Load: 36.3 t ADT: 1,961

COUNTY ROAD

Fair

Over: WOODRUFF CREEK

5.5 MILES W. OF WOODRUFF, Rich, UT

Built 1986 Load: 85.2 t ADT: 7

SR-30

Good

Over: BECKWITH CANAL

2.3 MI. WEST of WYO.LINE, Rich, UT

Built 2004 Load: 29.5 t ADT: 983

COUNTY ROAD

Good

Over: SAGE CREEK CANAL

3 MILES NE. OF RANDOLPH, Rich, UT

Built 1968 Load: 29.8 t ADT: 223

CO. ROAD-REED LANE

Good

Over: WOODRUFF-RANDOLPH CANAL

1 MILE EAST OF WOODRUFF, Rich, UT

Built 1990 Load: 96.6 t ADT: 48

COUNTY ROAD

Poor

Over: SALERATUS CREEK

6 MILES SOUTH OF WOODRUFF, Rich, UT

Built 1935 Load: 8.7 t ADT: 75

COUNTY ROAD

Poor

Over: BEAR RIVER

5 MILES NE. OF RANDOLPH, Rich, UT

Built 1947 Load: 14.3 t ADT: 223

COUNTY ROAD

Poor

Over: WOODRUFF-RANDOLPH CANAL

6 MILES SOUTH OF RANDOLPH, Rich, UT

Built 1981 Load: 64.2 t ADT: 26

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 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.