Total bridges
64
Public highway bridges in Lamar County
County profile · official public datasets
Lamar County, GA
64 public highway bridges tracked in the FHWA National Bridge Inventory: 56.3% rated Good, 40.6% Fair, 3.1% Poor.
- 64
- Public bridges
- 56.3%
- Good condition
- 3.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Lamar 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.
- 128th
- of 159 on Poor share
- 3.1%
- Poor-condition share
- 64
- public highway bridges
- 1967
- 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.
Lamar County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Lamar County ranks #128 of 159 Georgia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.1%). Lamar County, Georgia contains 64 public highway bridges. Roughly 56.3% are rated “Good,” 40.6% “Fair,” and 3.1% “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
56.3%
36 of 64 rated 7-9
Fair condition
40.6%
26 of 64 rated 5-6
Poor condition
3.1%
2 of 64 rated 4 or below
In-state Poor-share rank
#128 of 159
Among Georgia counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 64 NBI-tracked bridges by lowest applicable component rating.
Good 56.3% (36)
Fair 40.6% (26)
Poor 3.1% (2)
Lamar County's Poor-condition bridges carry 660 vehicle crossings a day
That is 0.2% of the county's reported daily bridge traffic on 3.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 330 crossings a day against 3,933 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 64 of 64 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
73.4% of Lamar County's bridges have passed the 50-year mark
47 of the 64 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 56.3% 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 72.7% of the county's Poor-condition bridge traffic
CANNAFAX FARM RD over LITTLE POTATO CREEK, built 1960, carries 480 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 660 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Lamar County's bridges were built
64 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 1
1930–1939
1 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s
1950–1959
16 bridges
- 1960s
1960–1969
23 bridges
- 1970s 7
1970–1979
7 bridges
- 1980s 4
1980–1989
4 bridges
- 1990s 2
1990–1999
2 bridges
- 2000s 3
2000–2009
3 bridges
- 2010s 3
2010–2019
3 bridges
What this shows Construction peaked in the 1960s, when 23 of the county's bridges still in the inventory were built, which is 35.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1967, 10 years older than the Georgia average of 1977.
How Lamar County compares with Georgia's closest counties by inventory size
The 5 Georgia counties nearest Lamar County in number of bridges, with their condition splits. Its 3.1% Poor share is the 5th-lowest of these 6. Its average build year of 1967 against a peer-group mean of 1979 is 12 years older.
Showing the 5 closest of 158 Georgia counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Cook County | 66 | 77.3% | 22.7% | 0% | 1976 |
| Pierce County | 65 | 86.2% | 13.8% | 0% | 1975 |
| Hancock County | 64 | 78.1% | 12.5% | 9.4% | 1975 |
| Jefferson County | 64 | 81.3% | 17.2% | 1.6% | 1978 |
| Lamar County (this page) | 64 | 56.3% | 40.6% | 3.1% | 1967 |
| Chattahoochee County | 63 | 73% | 25.4% | 1.6% | 1990 |
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 Lamar 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 Lamar County, both outside Georgia so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside GA (64 bridges here).
- Southeast Fairbanks County, AK · 64 bridges
- Delta County, CO · 64 bridges
- Sedgwick County, CO · 64 bridges
- Sagadahoc County, ME · 64 bridges
Similar average build year
Nearest mean year-built outside GA (1967 here).
- Los Angeles County, CA · avg 1967 · 3,547 bridges
- Allegheny County, PA · avg 1967 · 1,294 bridges
- Sonoma County, CA · avg 1967 · 609 bridges
- Merced County, CA · avg 1967 · 528 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (2)
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.