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)

SR 49 NB

Good

Over: CSX RR, LITTLE CALUMET R

00.37 S I-94, Porter, IN

Built 1970 Load: 41.8 t ADT: 12,304

SR 49 SB

Good

Over: CSX RR, LITTLE CALUMET R

00.37 S I-94, Porter, IN

Built 1970 Load: 42.8 t ADT: 12,304

US 6

Good

Over: BRANCH OF WILLOWCREEK

02.44 E SR 51, Porter, IN

Built 2009 Load: 43.1 t ADT: 18,331

SR 149

Good

Over: SALT CREEK

01.05 S US 6, Porter, IN

Built 1955 Load: 45.0 t ADT: 10,655

US 6

Good

Over: SALT CREEK

00.15 E SR 149, Porter, IN

Built 1985 Load: 45.7 t ADT: 16,012

US 20

Good

Over: WILLOW CREEK

01.60 E SR 51, Porter, IN

Built 1948 Load: 45.7 t ADT: 10,274

SR 149

Good

Over: SALT CREEK

00.93 N US 6, Porter, IN

Built 1955 Load: 46.3 t ADT: 2,533

SR 49

Good

Over: COOK DITCH

04.01 S SR 8, Porter, IN

Built 1984 Load: 47.6 t ADT: 3,922

SR 130

Good

Over: SALT CREEK

01.00 W SR 149, Porter, IN

Built 1932 Load: 48.3 t ADT: 9,572

CR 1050N

Good

Over: COFFEE CREEK

00.30 E JCT SR 49, Porter, IN

Built 1997 Load: 48.3 t ADT: 1,720

US 20

Good

Over: SALT CREEK

01.13 W SR 149, Porter, IN

Built 1994 Load: 51.2 t ADT: 11,285

CR 250E

Good

Over: LITTLE CALUMET RIVER

00.30 N CR 1225 N, Porter, IN

Built 2023 Load: 51.8 t ADT: 3,220

I-94 EB

Good

Over: LITTLE CALUMET RIVER

01.54 W SR 49, Porter, IN

Built 1969 Load: 52.5 t ADT: 40,081

I-94 WB

Good

Over: LITTLE CALUMET RIVER

01.54 W SR 49, Porter, IN

Built 1969 Load: 52.5 t ADT: 80,516

SR 2

Good

Over: WOLF CREEK

06.61 W US 30, Porter, IN

Built 2022 Load: 61.9 t ADT: 5,898

US 6

Good

Over: PEDESTRIAN TUNNEL

01.42 E SR 51 E JCT, Porter, IN

Built 2009 Load: 68.4 t ADT: 18,305

CR 1000S

Poor

Over: REEVES DITCH

01.00 E CR 600 E, Porter, IN

Built 1930 Load: 14.3 t ADT: 80

CR 600N

Poor

Over: SALT CREEK

00.25 W JCT SR 149, Porter, IN

Built 1970 Load: 16.5 t ADT: 1,670

CR 300S

Poor

Over: LUDINGTON DITCH

00.40 E CR 500 W, Porter, IN

Built 1972 Load: 20.7 t ADT: 340

CR 200W

Poor

Over: DAMON RUN

00.70 N U.S. 6, Porter, IN

Built 1968 Load: 22.0 t ADT: 3,230

CR 300W

Poor

Over: CORNELL DITCH

00.60 N 750 S, Porter, IN

Built 1930 Load: 25.3 t ADT: 110

CR 1050S

Poor

Over: PLEASANT TOWNSHIP DITCH

00.50 W CR 50 E, Porter, IN

Built 1930 Load: 26.2 t ADT: 200

CR 600E

Poor

Over: CROOKED CREEK

00.70 N 200 N, Porter, IN

Built 1971 Load: 26.6 t ADT: 80

WAVERLY ROAD

Poor

Over: LITTLE CALUMET RIVER

00.10 N ACKERMAN RD, Porter, IN

Built 1966 Load: 27.2 t ADT: 5,130

LENBURG ROAD

Poor

Over: SALT CREEK

00.30 E MCCOOL RD, Porter, IN

Built 1968 Load: 28.6 t ADT: 3,140

DIVISION ROAD

Poor

Over: HUTTON DITCH

00.40 W CR 575 E, Porter, IN

Built 1961 Load: 32.4 t ADT: 190

MINERAL SPRING

Structurally Deficient

Over: LITTLE CALUMET RIVER

00.40 N BEAM ST., Porter, IN

Built 1964 Load: 5.2 t ADT: 400

WILSON ROAD

Structurally Deficient

Over: DUNES CREEK

00.00 DUNES STATE PARK, Porter, IN

Built 1934 Load: 23.0 t ADT: 143

US 12 EB

Structurally Deficient

Over: BURNS DITCH (DEEP RIVER)

00.94 W SR 249, Porter, IN

Built 1970 Load: 42.4 t ADT: 4,635

US 12 WB

Structurally Deficient

Over: BURNS DITCH (DEEP RIVER)

00.94 W SR 249, Porter, IN

Built 1970 Load: 42.4 t ADT: 1,763

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