Total bridges
360
Public highway bridges in Polk County
County profile · official public datasets
Polk County, FL
360 public highway bridges tracked in the FHWA National Bridge Inventory: 55.3% rated Good, 44.7% Fair, 0% Poor.
- 360
- Public bridges
- 55.3%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Polk County posts a top-1% lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 1%
- lowest Poor share in state
- 0%
- Poor-condition share
- 360
- public highway bridges
- 1979
- 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.
Polk County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Polk County ranks #1 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Polk County, Florida contains 360 public highway bridges. Roughly 55.3% are rated “Good,” 44.7% “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
55.3%
199 of 360 rated 7-9
Fair condition
44.7%
161 of 360 rated 5-6
Poor condition
0%
0 of 360 rated 4 or below
In-state Poor-share rank
#1 of 67
Among Florida counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 360 NBI-tracked bridges by lowest applicable component rating.
Good 55.3% (199)
Fair 44.7% (161)
Poor 0% (0)
47.2% of Polk County's bridges have passed the 50-year mark
170 of the 360 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 55.3% 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.
When Polk County's bridges were built
360 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 7
1920–1929
7 bridges
- 1930s 10
1930–1939
10 bridges
- 1940s 23
1940–1949
23 bridges
- 1950s 27
1950–1959
27 bridges
- 1960s
1960–1969
83 bridges
- 1970s 26
1970–1979
26 bridges
- 1980s 18
1980–1989
18 bridges
- 1990s
1990–1999
89 bridges
- 2000s
2000–2009
38 bridges
- 2010s 28
2010–2019
28 bridges
- 2020s 10
2020–2029
10 bridges
What this shows Construction peaked in the 1990s, when 89 of the county's bridges still in the inventory were built, which is 24.7% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1979) matches the Florida average (1983).
How Polk County compares with Florida's closest counties by inventory size
The 5 Florida counties nearest Polk County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1983 is in line with the group.
Showing the 5 closest of 66 Florida counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Pinellas County | 435 | 63.7% | 34.5% | 1.8% | 1983 |
| Lee County | 391 | 75.4% | 23.8% | 0.8% | 1982 |
| Collier County | 370 | 73.2% | 24.9% | 1.9% | 1981 |
| Polk County (this page) | 360 | 55.3% | 44.7% | 0% | 1979 |
| Sarasota County | 298 | 57.7% | 41.6% | 0.7% | 1982 |
| Osceola County | 255 | 62.4% | 37.6% | 0% | 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 Polk 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 Polk County, both outside Florida so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside FL (360 bridges here).
- St. Tammany County, LA · 360 bridges
- San Mateo County, CA · 361 bridges
- Washita County, OK · 361 bridges
- Richland County, SC · 361 bridges
Similar average build year
Nearest mean year-built outside FL (1979 here).
- Pima County, AZ · avg 1979 · 1,150 bridges
- Jefferson County, KY · avg 1979 · 662 bridges
- Spartanburg County, SC · avg 1979 · 638 bridges
- McPherson County, KS · avg 1979 · 586 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (360)
CR-630A
FairOver: TORRES CREEK
0.5 MI E OF US-27, Polk, FL
Built 1970 Load: 27.8 t ADT: 5,400
THOMPSON NURSERY
FairOver: PEACE CREEK DRAIN CANAL
0.2MI WEST OF US-27, Polk, FL
Built 1976 Load: 27.8 t ADT: 6,600
SR-60
FairOver: MULBERRY DRAINAGE CANAL
0.12 MI EAST OF SR-37, Polk, FL
Built 1942 Load: 27.9 t ADT: 23,000
NICHOLS RD CR-676
FairOver: N. PRONG ALAFIA RIVER
1MI SOUTHWEST OF SR-60, Polk, FL
Built 1971 Load: 28.0 t ADT: 1,921
US-98 SR-700
FairOver: PEACE RIVER
1.1 MI EAST OF US-17, Polk, FL
Built 1928 Load: 28.1 t ADT: 5,300
CR-630
FairOver: IDA BRANCH
1.0MI E OF ALT-27/SR-17, Polk, FL
Built 1947 Load: 28.1 t ADT: 1,100
CR-640
FairOver: THIRTY MILE CREEK
2.8 MI WEST OF SR-37, Polk, FL
Built 1950 Load: 28.1 t ADT: 4,000
FROSTPROOF ROAD
FairOver: WILLINGHAM CREEK
2.9 MILES NORTH OF INTERS, Polk, FL
Built 1955 Load: 28.1 t ADT: 50
OLD DIXIE HWY
FairOver: FUSSELS DITCH
0.6 MI NORTH OF US-92, Polk, FL
Built 1940 Load: 28.5 t ADT: 2,604
CR-542
FairOver: MOSSEY CREEK
1.2 MI EAST OF COMBEE RD, Polk, FL
Built 1960 Load: 28.8 t ADT: 7,800
US-27 SB
FairOver: LAKE STREETY CANAL
0.4 MI. NORTH OF US-27A, Polk, FL
Built 1975 Load: 28.8 t ADT: 9,700
US-27 NB
FairOver: LAKE STREETY CANAL
0.4MI NOF SR-17 ALT US-27, Polk, FL
Built 1975 Load: 28.8 t ADT: 9,700
ROCKRIDGE ROAD
FairOver: DOG DITCH
3.2 MI NORTH OF US-98, Polk, FL
Built 1960 Load: 29.1 t ADT: 7,000
US-92 (SR-600)
FairOver: CSX R/R & MCKEAN ST
0.9 MI WEST OF SR-544, Polk, FL
Built 1972 Load: 29.5 t ADT: 38,500
CR-640
FairOver: PEACE RIVER
1.4 MI EAST OF US-17, Polk, FL
Built 1969 Load: 29.7 t ADT: 2,900
4TH WAHNETA ST. E
FairOver: WAHNETA DRAINAGE CANAL
0.5MI EAST OF CR-655, Polk, FL
Built 1960 Load: 29.8 t ADT: 30
BETHLEHEM ROAD
FairOver: S PRONG ALAFIA RIVER
1.5 MI WEST OF SR-37, Polk, FL
Built 1950 Load: 30.0 t ADT: 279
PEEPLES RD
FairOver: WHIDDEN CREEK OVERFLOW
2.8 MI SOUTH OF CR-630, Polk, FL
Built 1960 Load: 30.4 t ADT: 225
CR-557A
FairOver: EAGLE DITCH
1.0MI SOUTH OF I-4, Polk, FL
Built 1945 Load: 30.6 t ADT: 3,200
SNIVELY RD(CR-655)
FairOver: LULU CREEK
0.85MI SOUTH OF US-17, Polk, FL
Built 1960 Load: 30.6 t ADT: 12,600
SR-60
FairOver: BUTTERMILK SLOUGH N FORK
3.6MI W OF RIVER RANCH BL, Polk, FL
Built 1927 Load: 30.7 t ADT: 10,600
LILLY AVE
FairOver: CSX RR
135FT E OF 10TH ST, Polk, FL
Built 1927 Load: 30.7 t ADT: 9,000
FROSTPROOF ROAD
FairOver: RELIEF CANAL
2.3 MILES NORTH OF INTERS, Polk, FL
Built 1995 Load: 30.8 t ADT: 50
US-27 SB
FairOver: CSX R/R
2.1 MI SOUTH OF US-98, Polk, FL
Built 1975 Load: 31.4 t ADT: 9,700
US-27 NB
FairOver: CSX R/R
2.1 MI S OF US-98, Polk, FL
Built 1974 Load: 31.4 t ADT: 9,700
US-98 (SR-700)
FairOver: CYPRESS RUN
1.2 MI WEST OF SR-471, Polk, FL
Built 1947 Load: 31.5 t ADT: 11,200
SOCRUM LOOP/CR-582
FairOver: LAKE GIBSON OUTFALL
0.5 MI N OF I-4 (SR-400), Polk, FL
Built 1960 Load: 31.7 t ADT: 24,500
DEAN STILL RD
FairOver: PINE DRAINAGE CANAL
6.0 MI EAST OF SR-33, Polk, FL
Built 1960 Load: 31.7 t ADT: 1,765
US-27 (SR-25)
FairOver: BLACK HILLS CANAL
0.6 MI. SOUTH OF US-92, Polk, FL
Built 1965 Load: 31.9 t ADT: 56,000
FT GREEN RD.
FairOver: LITTLE PAYNE CREEK
0.5MI SOUTH OF MILLS RD, Polk, FL
Built 1960 Load: 32.0 t ADT: 1,400
SR-60 WB
FairOver: WEOHYAKAPKA CREEK
11.6MI EAST OF ALT US-27, Polk, FL
Built 1992 Load: 32.1 t ADT: 6,900
SR-60 EB
FairOver: WEOHYAKAPKA CREEK
11.6 MI EAST OF ALT US-27, Polk, FL
Built 1992 Load: 32.1 t ADT: 6,900
CR664(CTY LINE RD)
FairOver: SIRES DITCH
5.0MI EAST OF US 17, Polk, FL
Built 1950 Load: 32.2 t ADT: 500
MEDULLA RD
FairOver: HAMILTON CREEK
0.1MI E OF COUNTY LINE RD, Polk, FL
Built 1989 Load: 32.2 t ADT: 1,150
SR-60
FairOver: WAHNETA FARMS CANAL
6.2MI E OF US-17 OVERPASS, Polk, FL
Built 1951 Load: 32.3 t ADT: 26,000
RUCKS DAIRY RD
FairOver: REEDY CREEK
0.8MI S OF LK ARBUCKLE RD, Polk, FL
Built 1960 Load: 32.3 t ADT: 229
CR630A/FT MEADE RD
FairOver: BOBS BASIN
1.6 MI E OF US-27, Polk, FL
Built 1995 Load: 32.6 t ADT: 3,100
I-4 WB (SR-400)
FairOver: SR-33 (LAKELAND HILLS BL
3.4 MI WEST OF SR-570, Polk, FL
Built 1961 Load: 32.7 t ADT: 46,500
I-4 EB (SR-400)
FairOver: SR-33 (LAKELAND HILLS B
3.4 MI W OF SR-570, Polk, FL
Built 1961 Load: 32.7 t ADT: 48,000
I-4 WB (SR-400)
FairOver: CR-655 (BERKLEY RD.)
1.3MI E OF SR-570, Polk, FL
Built 1961 Load: 32.7 t ADT: 50,750
I-4 EB (SR-400)
FairOver: CR-655 (BERKLEY RD.)
1.3MI E OF SR-570, Polk, FL
Built 1961 Load: 32.7 t ADT: 50,750
US-27 (SR-25)
FairOver: LAKE HAMILTON CREEK
0.8 MI. SOUTH OF SR-544, Polk, FL
Built 1958 Load: 32.7 t ADT: 45,000
ROCKRIDGE RD.
FairOver: GATOR CREEK DRAIN
1.5MI NORTH OF US-98, Polk, FL
Built 1960 Load: 32.8 t ADT: 7,000
CR-546
FairOver: SADDLE CREEK
1.7 MI EAST OF SR-659, Polk, FL
Built 1960 Load: 33.1 t ADT: 6,900
ROCKRIDGE RD.
FairOver: STONE DITCH
4.7MI NORTH OF US-98, Polk, FL
Built 1960 Load: 33.5 t ADT: 7,000
SR540(WINTER LAKE)
FairOver: SADDLE CREEK
3.0 MI EAST OF US-98, Polk, FL
Built 1950 Load: 33.6 t ADT: 12,200
US-17 (SR-35)
FairOver: SADDLE CREEK
1.2 MI NORTH OF US-98, Polk, FL
Built 1985 Load: 33.6 t ADT: 26,000
MT PISGAH RD-CR657
FairOver: PEACE RIVER
5.3MI NORTH OF CR-664, Polk, FL
Built 1961 Load: 33.7 t ADT: 600
SR-60
FairOver: TIGER LAKE DRAIN
16.4 MI. EAST OF SR-27, Polk, FL
Built 2004 Load: 33.7 t ADT: 11,900
US-92 (SR-600A)
FairOver: SR-539 (KATHLEEN RD)
0.7 MI S OF I-4 (SR-400), Polk, FL
Built 1953 Load: 33.8 t ADT: 29,000
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.