Total bridges
115
Public highway bridges in Latah County
County profile · official public datasets
Latah County, ID
115 public highway bridges tracked in the FHWA National Bridge Inventory: 35.7% rated Good, 64.3% Fair, 0% Poor.
- 115
- Public bridges
- 35.7%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Latah County posts a top-10% lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 7%
- lowest Poor share in state
- 0%
- Poor-condition share
- 115
- public highway bridges
- 1978
- 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.
Latah County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Latah County ranks #3 of 44 Idaho counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Latah County, Idaho contains 115 public highway bridges. Roughly 35.7% are rated “Good,” 64.3% “Fair,” and 0% “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
35.7%
41 of 115 rated 7-9
Fair condition
64.3%
74 of 115 rated 5-6
Poor condition
0%
0 of 115 rated 4 or below
In-state Poor-share rank
#3 of 44
Among Idaho counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 115 NBI-tracked bridges by lowest applicable component rating.
Good 35.7% (41)
Fair 64.3% (74)
Poor 0% (0)
45.2% of Latah County's bridges have passed the 50-year mark
52 of the 115 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 35.7% 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.
When Latah County's bridges were built
115 bridges with a recorded construction year, grouped by decade
- 1910s 2
1910–1919
2 bridges
- 1930s 8
1930–1939
8 bridges
- 1940s 6
1940–1949
6 bridges
- 1950s
1950–1959
12 bridges
- 1960s 8
1960–1969
8 bridges
- 1970s
1970–1979
29 bridges
- 1980s 9
1980–1989
9 bridges
- 1990s
1990–1999
13 bridges
- 2000s 10
2000–2009
10 bridges
- 2010s 11
2010–2019
11 bridges
- 2020s 7
2020–2029
7 bridges
What this shows Construction peaked in the 1970s, when 29 of the county's bridges still in the inventory were built, which is 25.2% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1978) matches the Idaho average (1979).
How Latah County compares with Idaho's closest counties by inventory size
The 5 Idaho counties nearest Latah County in number of bridges, with their condition splits. Its 0% Poor share is the 2nd-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1980 is in line with the group.
Showing the 5 closest of 43 Idaho counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Twin Falls County | 126 | 12.7% | 84.1% | 3.2% | 1973 |
| Bannock County | 124 | 33.1% | 62.1% | 4.8% | 1981 |
| Cassia County | 116 | 15.5% | 84.5% | 0% | 1984 |
| Latah County (this page) | 115 | 35.7% | 64.3% | 0% | 1978 |
| Lemhi County | 112 | 53.6% | 40.2% | 6.3% | 1988 |
| Jerome County | 110 | 10% | 80.9% | 9.1% | 1974 |
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 Latah 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 Latah County, both outside Idaho so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside ID (115 bridges here).
- Alachua County, FL · 115 bridges
- Walton County, GA · 115 bridges
- Whitley County, IN · 115 bridges
- Carver County, MN · 115 bridges
Similar average build year
Nearest mean year-built outside ID (1978 here).
- Orange County, CA · avg 1978 · 1,164 bridges
- Sumner County, KS · avg 1978 · 659 bridges
- Allen County, IN · avg 1978 · 613 bridges
- Livingston County, IL · avg 1978 · 579 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (115)
NO DATA ENTERED
GoodOver: NO DATA ENTERED
NO DATA ENTERED, Latah, ID
Built 2017 Load: 42.8 t ADT: 50
US 95
GoodOver: FOUR MILE CREEK
6.9 N. MOSCOW, Latah, ID
Built 2018 Load: 43.1 t ADT: 6,400
VIOLA MAIN STREET
GoodOver: FOUR MILE CREEK
0.1 N. VIOLA, Latah, ID
Built 2010 Load: 43.5 t ADT: 130
SH 3
GoodOver: W. FK. POTLATCH RIVER
3.5 N. BOVILL, Latah, ID
Built 2020 Load: 46.0 t ADT: 440
STC4790;THORN CRK
GoodOver: THORN CREEK
3.4 N. 3.7 W. GENESSE, Latah, ID
Built 2013 Load: 48.3 t ADT: 320
SH 3
GoodOver: M. FK. POTLATCH CREEK
AT JULIAETTA NCL, Latah, ID
Built 2021 Load: 49.6 t ADT: 2,900
FDR 447
GoodOver: NF PALOUSE RIVER
17 MILES FROM POTLATCH ID, Latah, ID
Built 1998 Load: 50.5 t ADT: 20
S4808;ROBINSON PK
GoodOver: S.FK.PALOUSE RIVER
0.5 N. 2.8 E. MOSCOW, Latah, ID
Built 2018 Load: 50.9 t ADT: 670
STADIUM DR
GoodOver: PARADISE CREEK
IN MOSCOW @ U OF I, Latah, ID
Built 2010 Load: 51.7 t ADT: 7,000
W. 6TH STREET
GoodOver: LITTLE BEAR CREEK
IN TROY, Latah, ID
Built 2020 Load: 55.7 t ADT: 50
SMA7724; JOSEPH ST
GoodOver: PARADISE CREEK
IN MOSCOW; JOSEPH ST, Latah, ID
Built 2009 Load: 58.1 t ADT: 1,400
STADIUM DR
GoodOver: PARADISE CREEK
IN MOSCOW @ U OF I, Latah, ID
Built 2010 Load: 59.0 t ADT: 7,000
SH 6
GoodOver: E.FK.MEADOW CREEK
6.3 N. HARVARD, Latah, ID
Built 1991 Load: 70.8 t ADT: 710
SMA 7674;MTN VIEW
GoodOver: PARADISE CREEK
MTN VIEW @ WHITE AVE., Latah, ID
Built 1997 Load: 87.1 t ADT: 5,700
SMA 7754;D ST
GoodOver: PARADISE CREEK
IN MOSCOW, Latah, ID
Built 1950 Load: 99.9 t ADT: 1,500
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.