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.
Good-condition bridges (199)
OLD BOWLING GRN RD
GoodOver: WHIDDEN CREEK
1.0MI N OF HUTCHINS RD., Polk, FL
Built 1910 Load: 10.3 t ADT: 372
SR-33
GoodOver: KELLY L SLOUGH
7.2 MI NORTH OF I-4, Polk, FL
Built 1939 Load: 17.1 t ADT: 10,337
DRANE FIELD ROAD
GoodOver: HAMILTON BRANCH
0.3 MI EAST OF CO LINE RD, Polk, FL
Built 1990 Load: 18.9 t ADT: 8,100
CROTON ROAD
GoodOver: WAHNETA FARM CANAL
0.1MI EAST OF CR-655, Polk, FL
Built 1940 Load: 19.2 t ADT: 268
DUFF ROAD
GoodOver: FOX BRANCH
0.2 MI WEST OF US-98, Polk, FL
Built 1987 Load: 19.4 t ADT: 9,500
SR-539 KATHLEEN RD
GoodOver: I-4 (SR-400)
0.8 MI SOUTH OF CR-582, Polk, FL
Built 2005 Load: 21.5 t ADT: 33,500
SR-33
GoodOver: FORK CREEK
1.7MI S OF I-4 (SR400), Polk, FL
Built 1940 Load: 21.6 t ADT: 12,500
SIMMS ROAD
GoodOver: CHIPPER CREEK
0.2 MI NORTH OF CR-582, Polk, FL
Built 1960 Load: 21.6 t ADT: 138
SR-60 WB
GoodOver: PEACE CREEK RELIEF
4.1 MI WEST OF US-27, Polk, FL
Built 1951 Load: 21.9 t ADT: 13,000
DEAN STILL RD.
GoodOver: HEREFORD CREEK
3.2MI WEST OF SR-33, Polk, FL
Built 1960 Load: 22.5 t ADT: 3,400
CR-542
GoodOver: COW PATTY DRAIN
0.7 MI W OF AIRPORT RD, Polk, FL
Built 1960 Load: 22.9 t ADT: 2,900
SR-33
GoodOver: BRUSH CREEK
12.0MI NORTH OF I-4, Polk, FL
Built 1939 Load: 23.1 t ADT: 10,800
W. PIPKIN ROAD
GoodOver: POLEY CREEK
2.5 MI WEST OF SR-37, Polk, FL
Built 1975 Load: 23.7 t ADT: 13,500
WESTOVER STREET
GoodOver: TIMMYS DITCH
200FT S OF CAROLYN DR, Polk, FL
Built 1994 Load: 23.9 t ADT: 350
RIVER RANCH BLVD.
GoodOver: BUTTERMILK SLOUGH
1.8MI SOUTH OF SR-60, Polk, FL
Built 1968 Load: 24.1 t ADT: 669
US-17 (SR-35)
GoodOver: SIX MILE CREEK
2.3 MI SOUTH OF SR-60, Polk, FL
Built 1970 Load: 25.2 t ADT: 19,700
SR-33
GoodOver: LIZARD CREEK
8.4 MI NORTH OF I-4, Polk, FL
Built 1940 Load: 25.3 t ADT: 10,337
WEST ORANGE STREET
GoodOver: SR-563
0.2MI W OF SR-37, Polk, FL
Built 1974 Load: 25.3 t ADT: 5,800
CR-35A W SOCRUM LP
GoodOver: FOX BRANCH
0.8 MI WEST OF US-98, Polk, FL
Built 1920 Load: 25.5 t ADT: 20,500
NORALYN MINE RD
GoodOver: SIX MILE CREEK
2.8 MI S of SR-60, Polk, FL
Built 1985 Load: 25.5 t ADT: 531
Lake Crago Drive
GoodOver: Lake Crago Canal
1000Ft. E of SR-33, Polk, FL
Built 2016 Load: 25.9 t ADT: 20
US-92 (SR-600)
GoodOver: HAMILTON BRANCH
1.7MI E OF COUNTY LINE RD, Polk, FL
Built 1925 Load: 26.2 t ADT: 13,400
SNELL RD
GoodOver: BOGGY BRANCH
0.5 MI W OF WALKER LK RD, Polk, FL
Built 1960 Load: 26.4 t ADT: 101
PARK BYRD ROAD
GoodOver: PINWHEEL DITCH
0.2 MI SOUTH OF CR-35A, Polk, FL
Built 1960 Load: 26.5 t ADT: 479
US-17 SB (SR-35)
GoodOver: CSX R/R
5.0 MI S OF US-98, Polk, FL
Built 1974 Load: 26.9 t ADT: 6,767
SR-544
GoodOver: HAVENDALE CANAL
1.8 MI SE OF JCT US-92, Polk, FL
Built 1972 Load: 27.5 t ADT: 33,500
CR-655A COX ROAD
GoodOver: BOGGY CREEK
1.5 MI EAST OF CR-559, Polk, FL
Built 1972 Load: 27.8 t ADT: 3,400
N. WILSON AVE.
GoodOver: BEAR CREEK CANAL
0.2 MI. NORTH OF SR-60, Polk, FL
Built 1988 Load: 27.8 t ADT: 992
MEDULLA ROAD
GoodOver: ENGLISH CREEK
1.4MI E OF COUNTY LINE RD, Polk, FL
Built 1960 Load: 28.1 t ADT: 1,150
US-92 (SR-600)
GoodOver: WINSTON CREEK
1 MI E OF N GALLOWAY RD, Polk, FL
Built 1926 Load: 28.3 t ADT: 19,100
SR 570 EB 11
GoodOver: REYNOLDS ROAD
11.1 MI EAST OF I-4, Polk, FL
Built 1998 Load: 28.4 t ADT: 14,050
SR 570 POLK WB 2.8
GoodOver: SR 572 AIRPORT ROAD
2.9MI E OF I-4 WEST, Polk, FL
Built 1997 Load: 28.5 t ADT: 18,100
SR 570 POLK EB 2.8
GoodOver: SR 572 AIRPORT ROAD
2.9 MI E OF I-4 WEST, Polk, FL
Built 1997 Load: 28.5 t ADT: 18,100
SR 570 POLK EB 0.0
GoodOver: I-4 SR 400
I-4 WEST INTERCHANGE, Polk, FL
Built 1998 Load: 28.7 t ADT: 16,700
21ST STREET NW
GoodOver: CANAL
0.2MI N OF HAVENDALE BLVD, Polk, FL
Built 1996 Load: 28.9 t ADT: 4,400
CR-655 RIFLE RANGE
GoodOver: WAHNETA FARMS DRAINAGE
1.5MI NORTH OF SR-60, Polk, FL
Built 1960 Load: 29.0 t ADT: 6,763
WALKER ROAD
GoodOver: ITCHEPACKESASSA CREEK
0.8 Mi. South of CR 582, Polk, FL
Built 1946 Load: 29.4 t ADT: 2,386
US-27 (SR-25)
GoodOver: I-4 (SR-400)
US-27 & I-4 INTERSECTION, Polk, FL
Built 2004 Load: 29.7 t ADT: 72,576
DEAN STILL RD.
GoodOver: KIMS CREEK
0.6 MI EAST OF SR-33, Polk, FL
Built 1960 Load: 29.8 t ADT: 4,400
DEAN STILL RD
GoodOver: DRAINAGE CANAL
2.0 MI EAST OF SR-33, Polk, FL
Built 1960 Load: 30.0 t ADT: 2,071
SR-33
GoodOver: LAKE PARKER GIBSON CANAL
4.1MI N OF US-98/92, Polk, FL
Built 1936 Load: 30.3 t ADT: 12,500
SR570 POLK WB 11.7
GoodOver: PAVERS ROAD
1.5 MI EAST OF US 98, Polk, FL
Built 1997 Load: 31.6 t ADT: 14,050
SR570 POLK EB 11.7
GoodOver: PAVERS ROAD
1.5 MI EAST OF US 98, Polk, FL
Built 1997 Load: 31.6 t ADT: 14,050
OLD US-37
GoodOver: WHISKEY STORE CREEK
0.1 MI S OF AGRICOLA MINE, Polk, FL
Built 1995 Load: 31.6 t ADT: 350
ALT US-27 (SR-17)
GoodOver: LAKE STREETY CREEK
1.2 MI. EAST OF US-27, Polk, FL
Built 1946 Load: 31.7 t ADT: 3,800
CLARK ROAD 0.0
GoodOver: I-4 SR 400
I-4 WEST INTERCHANGE, Polk, FL
Built 1998 Load: 31.8 t ADT: 7,000
SR 570 POLK EB 0.5
GoodOver: CR 542 & CSX RAILROAD
0.4 MI S OF I-4 WEST INT, Polk, FL
Built 1998 Load: 32.0 t ADT: 18,100
SR 570 POLK WB 0.5
GoodOver: CR 542 & CSX RAILROAD
0.4 MI S OF I-4 WEST INT, Polk, FL
Built 1998 Load: 32.0 t ADT: 18,100
OAKBRIDGE BLVD NB
GoodOver: DRAINAGE CANAL
98FT N OF N FRONTAGE RD, Polk, FL
Built 1985 Load: 32.3 t ADT: 1,500
OAKBRIDGE BLVD SB
GoodOver: DRAINAGE CANAL
98FT N OF N FRONTAGE RD, Polk, FL
Built 1985 Load: 32.3 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.