Porter County, IN

280 public highway bridges

Porter County Bridge Snapshot

Porter County, Indiana contains 280 public highway bridges in the FHWA National Bridge Inventory. Roughly 29.3% are rated “Good,” 38.2% “Fair,” 5% “Poor,” and 5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in IN are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

280
Total Bridges
29.3%
Good
5%
Poor
5%
Structurally Deficient

Condition Distribution

Good
29.3% (82)
Fair
38.2% (107)
Poor
5% (14)
SD
5% (14)

All Bridges (280)

US 30

Fair

Over: SALT CREEK

00.23 W SR 2, Porter, IN

Built 1938 Load: 33.0 t ADT: 23,497

SR 8

Fair

Over: CROOKED CREEK

01.87 E SR 49, Porter, IN

Built 1992 Load: 33.7 t ADT: 3,278

CR 50E

Fair

Over: PLEASANT TOWNSHIP DITCH

00.60 N 1050 S, Porter, IN

Built 1930 Load: 33.7 t ADT: 190

CR 400N

Fair

Over: SALT CREEK

00.20 E CR 375 W, Porter, IN

Built 1963 Load: 33.8 t ADT: 1,040

I-94 EB

Fair

Over: CSX RR

00.63 E SR 49, Porter, IN

Built 1969 Load: 34.0 t ADT: 57,732

I-94 WB

Fair

Over: CSX RR

00.63 E SR 49, Porter, IN

Built 1969 Load: 34.0 t ADT: 28,915

CENTRAL AVENUE

Fair

Over: WILLOW CREEK

00.20 SW SWANSON RD, Porter, IN

Built 1973 Load: 34.0 t ADT: 8,390

I-94 EB

Fair

Over: NS RR

01.36 E US 20, Porter, IN

Built 1969 Load: 35.4 t ADT: 80,516

CR 50W

Fair

Over: SANDY HOOK DITCH

00.10 N JCT. SR 8, Porter, IN

Built 1930 Load: 35.6 t ADT: 10

SR 49 NB

Fair

Over: COFFEE CREEK

01.85 S I-94, Porter, IN

Built 1969 Load: 36.0 t ADT: 11,444

SR 49 SB

Fair

Over: COFFEE CREEK

01.85 S I-94, Porter, IN

Built 1969 Load: 36.0 t ADT: 13,666

CR 300S

Fair

Over: CROOKED CREEK

00.10 E CR 525 E, Porter, IN

Built 1930 Load: 36.0 t ADT: 440

INDIAN BOUNDARY RD

Fair

Over: COFFEE CREEK

00.20 E CALUMET ROAD, Porter, IN

Built 1980 Load: 36.9 t ADT: 132

COUNTY LINE ROAD

Fair

Over: WEST BEACH ROAD

0.3 MILES NORTH OF U.S. R, Porter, IN

Built 1991 Load: 37.2 t ADT: 10,000

CR 900S

Fair

Over: SANDY HOOK DITCH

00.10 W CR 150 W, Porter, IN

Built 1930 Load: 38.2 t ADT: 410

CR 400N

Fair

Over: HUTTON DITCH

00.20 E CR 325E, Porter, IN

Built 1985 Load: 38.6 t ADT: 2,530

SR 2

Fair

Over: CSX RR

02.80 W US 6, Porter, IN

Built 1956 Load: 39.5 t ADT: 7,599

I-94 EB

Fair

Over: AMTRAK

00.54 W SR 49, Porter, IN

Built 1969 Load: 40.4 t ADT: 40,081

I-94 WB

Fair

Over: AMTRAK

00.54 W SR 49, Porter, IN

Built 1969 Load: 40.4 t ADT: 40,435

US 20

Fair

Over: LITTLE CALUMET RIVER

01.56 W SR 49, Porter, IN

Built 1993 Load: 41.8 t ADT: 7,745

I-90 EB/WB

Fair

Over: COFFEE CREEK

00.10 E CR 200 E, Porter, IN

Built 1957 Load: 46.3 t ADT: 26,180

I-90 EB

Fair

Over: SALT CREEK

00.36 W SR 149, Porter, IN

Built 1956 Load: 47.7 t ADT: 16,295

I-90 WB

Fair

Over: SALT CREEK

00.36 W SR 149, Porter, IN

Built 1956 Load: 47.7 t ADT: 16,295

I-90 EB

Fair

Over: CSX RR

00.16 E SR 149, Porter, IN

Built 1956 Load: 48.6 t ADT: 16,295

I-90 WB

Fair

Over: CSX RR

00.16 E SR 149, Porter, IN

Built 1956 Load: 48.6 t ADT: 16,295

US 231

Fair

Over: DOG LEG DITCH

0.48 N of S Jct SR 2, Porter, IN

Built 1983 Load: 49.2 t ADT: 8,585

I-90 EB

Fair

Over: PRAIRIE DUNELAND BIKE TR

01.71 W SR 149, Porter, IN

Built 1956 Load: 50.4 t ADT: 16,295

I-90 WB

Fair

Over: PRAIRIE-DUNELAND BIKE TR

01.71 W SR 149, Porter, IN

Built 1956 Load: 50.4 t ADT: 16,295

I-90 EB

Fair

Over: CONRAIL RR

01.24 E I-94, Porter, IN

Built 1956 Load: 53.5 t ADT: 17,335

I-90 WB

Fair

Over: CONRAIL RR

01.24 E I-94, Porter, IN

Built 1956 Load: 53.5 t ADT: 17,335

I-90

Fair

Over: WILLOW CREEK

00.05 S RR, Porter, IN

Built 1957 Load: 90.7 t ADT: 34,670

SR 2

Fair

Over: W BRANCH CROOKED CREEK

03.32 E SR 49, Porter, IN

Built 1990 Load: 97.2 t ADT: 8,009

STONE AVENUE

Fair

Over: WILLOW CREEK

00.50 W WILLOWCREEK RD, Porter, IN

Built 1966 Load: 97.2 t ADT: 7,280

CR 900S

Fair

Over: BRANCH COBBS CREEK

00.30 W JCT SR 2, Porter, IN

Built 1975 Load: 97.2 t ADT: 610

SR 249 SB

Good

Over: LITTLE CALUMET RIVER

00.71 N I-94, Porter, IN

Built 1972 Load: 22.4 t ADT: 12,140

CR 600S

Good

Over: KOSELKI DITCH

0.4 MILES W CR 450 E, Porter, IN

Built 1985 Load: 22.7 t ADT: 410

CR 450E

Good

Over: KOSELKI DITCH

00.30 N 500 S, Porter, IN

Built 1930 Load: 24.9 t ADT: 160

SR 249 NB

Good

Over: MUCK POCKET-SALT CREEK

00.24 S US 12, Porter, IN

Built 1972 Load: 25.6 t ADT: 4,343

CR 600E

Good

Over: REEVES DITCH

00.80 N 1200 SO, Porter, IN

Built 1930 Load: 25.9 t ADT: 60

CR 500S

Good

Over: KOSELKI DITCH

00.30 W CR 450 E, Porter, IN

Built 1976 Load: 27.5 t ADT: 120

SR 249 SB

Good

Over: MUCK POCKET-SALT CREEK

00.24 S US 12, Porter, IN

Built 1972 Load: 27.9 t ADT: 5,909

I-94 EB

Good

Over: SALT CREEK

01.25 W SR 149, Porter, IN

Built 1969 Load: 27.9 t ADT: 35,803

I-94 WB

Good

Over: SALT CREEK

01.25 W SR 149, Porter, IN

Built 1969 Load: 27.9 t ADT: 35,203

SR 49 NB

Good

Over: NS RR

00.50 S US 30, Porter, IN

Built 1987 Load: 28.2 t ADT: 9,466

SR 49 SB

Good

Over: NS RR

00.50 S US 30, Porter, IN

Built 1987 Load: 28.2 t ADT: 9,235

CR 625W

Good

Over: KANKAKEE RIVER

01.60 S CR 1000 S, Porter, IN

Built 2021 Load: 28.8 t ADT: 1,320

CR 100W

Good

Over: HALL CREEK

00.70 S CR 200 S, Porter, IN

Built 2012 Load: 29.2 t ADT: 570

CR 300S

Good

Over: AHLGRIM DITCH

0.2 MILES E OF S.R. 49, Porter, IN

Built 2016 Load: 29.2 t ADT: 970

SR 49

Good

Over: CROOKED CREEK

02.50 S SR 8, Porter, IN

Built 2003 Load: 30.1 t ADT: 4,070

MANDER ROAD

Good

Over: KOSELKI DITCH

00.50 NE JCT US 6, Porter, IN

Built 1975 Load: 30.5 t ADT: 320

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial