Total bridges
53
Public highway bridges in Lincoln County
County profile · official public datasets
Lincoln County, ID
53 public highway bridges tracked in the FHWA National Bridge Inventory: 18.9% rated Good, 58.5% Fair, 22.6% Poor.
- 53
- Public bridges
- 18.9%
- Good condition
- 22.6%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Lincoln 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.
- 44th
- of 44 on Poor share
- 22.6%
- Poor-condition share
- 53
- public highway bridges
- 1973
- 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.
Lincoln County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Lincoln County ranks #44 of 44 Idaho counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 22.6%). Lincoln County, Idaho contains 53 public highway bridges. Roughly 18.9% are rated “Good,” 58.5% “Fair,” and 22.6% “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.
Good condition
18.9%
10 of 53 rated 7-9
Fair condition
58.5%
31 of 53 rated 5-6
Poor condition
22.6%
12 of 53 rated 4 or below
In-state Poor-share rank
#44 of 44
Among Idaho counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 53 NBI-tracked bridges by lowest applicable component rating.
Good 18.9% (10)
Fair 58.5% (31)
Poor 22.6% (12)
Lincoln County's Poor-condition bridges carry 860 vehicle crossings a day
That is 2.3% of the county's reported daily bridge traffic on 22.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 72 crossings a day against 1,647 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 53 of 53 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
52.8% of Lincoln County's bridges have passed the 50-year mark
28 of the 53 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 18.9% 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 23.3% of the county's Poor-condition bridge traffic
NORTH APPLE STREET over LITTLE WOOD RIVER, built 1920, carries 200 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 12-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 860 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Lincoln County's bridges were built
53 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 1
1920–1929
1 bridges
- 1930s 1
1930–1939
1 bridges
- 1940s
1940–1949
5 bridges
- 1950s
1950–1959
8 bridges
- 1960s
1960–1969
10 bridges
- 1970s
1970–1979
8 bridges
- 1980s
1980–1989
7 bridges
- 1990s 2
1990–1999
2 bridges
- 2000s 1
2000–2009
1 bridges
- 2010s
2010–2019
7 bridges
- 2020s 2
2020–2029
2 bridges
What this shows Construction peaked in the 1960s, when 10 of the county's bridges still in the inventory were built, which is 18.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1973, 6 years older than the Idaho average of 1979.
How Lincoln County compares with Idaho's closest counties by inventory size
The 5 Idaho counties nearest Lincoln County in number of bridges, with their condition splits. Its 22.6% Poor share is the 6th-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1978 is 5 years older.
Showing the 5 closest of 43 Idaho counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Camas County | 61 | 27.9% | 62.3% | 9.8% | 1978 |
| Gem County | 57 | 28.1% | 70.2% | 1.8% | 1976 |
| Lincoln County (this page) | 53 | 18.9% | 58.5% | 22.6% | 1973 |
| Owyhee County | 48 | 31.3% | 60.4% | 8.3% | 1975 |
| Benewah County | 47 | 21.3% | 74.5% | 4.3% | 1978 |
| Caribou County | 45 | 26.7% | 66.7% | 6.7% | 1985 |
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 Lincoln 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 Lincoln County, both outside Idaho so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside ID (53 bridges here).
- Cleburne County, AR · 53 bridges
- Citrus County, FL · 53 bridges
- Lumpkin County, GA · 53 bridges
- Stewart County, GA · 53 bridges
Similar average build year
Nearest mean year-built outside ID (1973 here).
- Jefferson County, AL · avg 1973 · 1,068 bridges
- Erie County, NY · avg 1973 · 906 bridges
- Davidson County, TN · avg 1973 · 832 bridges
- Lancaster County, PA · avg 1973 · 801 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (10)
ARKOOSH ROAD
GoodOver: LITTLE WOOD RIVER
1.3 N 8.4 W. SHOSHONE, Lincoln, ID
Built 2023 Load: 32.7 t ADT: 30
3236: RIVERWOOD RO
GoodOver: Little Wood River
0.5 mi S of US26, Lincoln, ID
Built 1999 Load: 33.7 t ADT: 25
720 NORTH ROAD
GoodOver: MILNER GOODING CANAL
7.2 N. 7.7 W SHOSHONE, Lincoln, ID
Built 2021 Load: 34.7 t ADT: 50
1420 NORTH ROAD
GoodOver: EAST MAIN CANAL
6.5 N 2.5 W RICHFIELD, Lincoln, ID
Built 2013 Load: 36.0 t ADT: 210
SH 75
GoodOver: LITTLE WOOD RIVER
AT SHOSHONE NCL, Lincoln, ID
Built 1958 Load: 36.3 t ADT: 6,700
1350 EAST ROAD
GoodOver: STRATTON CANAL
2.0 N 1.0 E RICHFIELD, Lincoln, ID
Built 2013 Load: 37.9 t ADT: 112
SH 75
GoodOver: MILNER GOODING CANAL
1.4 N. SHOSHONE, Lincoln, ID
Built 2013 Load: 39.0 t ADT: 4,700
NORTH GRAPE STREET
GoodOver: LITTLE WOOD RIVER
IN SHOSHONE; N. GRAPE ST, Lincoln, ID
Built 2016 Load: 39.2 t ADT: 100
SH 75
GoodOver: NORTH GOODING CANAL
6.3 N. SHOSHONE, Lincoln, ID
Built 2013 Load: 40.8 t ADT: 4,200
STC2781;470 N. RD.
GoodOver: 700 CREEK
4.3 N. 6.5 W. SHOSHONE, Lincoln, ID
Built 1965 Load: 47.2 t ADT: 340
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.