Marion County, IN

964 public highway bridges

Marion County Bridge Snapshot

Marion County, Indiana contains 964 public highway bridges in the FHWA National Bridge Inventory. Roughly 27% are rated “Good,” 36% “Fair,” 3.7% “Poor,” and 3.7% 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.

964

Total Bridges

27%

Good

3.7%

Poor

3.7%

Structurally Deficient

Condition Distribution

Good

27% (260)

Fair

36% (347)

Poor

3.7% (36)

SD

3.7% (36)

All Bridges (964)

Sort:

I-465 NB

Over: FALL CREEK RD EB & WB

02.00 S I-69, Marion, IN

Built 1968 ADT: 11,669

I-465 SB

Over: FALL CREEK ROAD

02.00 S I-69, Marion, IN

Built 1968 ADT: 11,669

I-465 NB

Over: 71ST ST EB & WB

00.91 S I-69, Marion, IN

Built 1968 ADT: 6,763

I-465 SB

Over: 71ST ST EB/WB

00.91 S I-69, Marion, IN

Built 1968 ADT: 6,763

I-465 NB

Over: I69 SB

04.56 N US 36 / SR 67, Marion, IN

Built 1968 ADT: 40,480

I-465 SB

Over: I69 SB

04.56 N US 36 / SR 67, Marion, IN

Built 1968 ADT: 40,480

RAMP I69SB-I465SB

Over: NB SR 37X & BINFORD AVE

04.56 N US 36 / SR 67, Marion, IN

Built 1968 ADT: 19,218

I-465 NB

Over: I-69 SB RAMP

00.20 N I-69, Marion, IN

Built 1968 ADT: 34,007

I-465 SB

Over: I-69 SB RAMP

00.20 N I-69, Marion, IN

Built 1968 ADT: 34,007

ALLISONVILLE ROAD

Over: I-465 EBL

01.56 W I-69, Marion, IN

Built 2012 ADT: 78,848

W 96TH STREET

Over: I-465 EB

01.15 W of US 31, Marion, IN

Built 2007 ADT: 61,891

DITCH ROAD

Over: I-465 EB

01.50 W US 31, Marion, IN

Built 2020 ADT: 57,640

TOWNSHIP LINE ROAD

Over: I465 EB

01.35 E US 421, Marion, IN

Built 1966 ADT: 61,891

I-465 EB

Over: US 421 SBL

03.89 W US-31, Marion, IN

Built 1966 ADT: 38,219

I-465 WB

Over: US 421 SBL

03.89 W US 31, Marion, IN

Built 1966 ADT: 23,103

I-465 EB

Over: WEST 96TH STREET

01.22 W US 421, Marion, IN

Built 1967 ADT: 9,263

I-465 WB

Over: WEST 96TH STREET

01.22 W US 421, Marion, IN

Built 1967 ADT: 9,263

I-465 EB

Over: ZIONSVILLE ROAD

01.71 W US 421, Marion, IN

Built 1967 ADT: 6,016

I-465 WB

Over: ZIONSVILLE ROAD

01.71 W US 421, Marion, IN

Built 1967 ADT: 6,016

I-465 NB

Over: 96TH ST EB & WB

04.40 N I-65, Marion, IN

Built 1968 ADT: 6,086

I-465 SB

Over: 96TH ST EB & WB

04.40 N I-65, Marion, IN

Built 1968 ADT: 6,086

I-465 NB

Over: WEST 86TH STREET WB

03.39 N I-65, Marion, IN

Built 2005 ADT: 17,969

I-465 SB

Over: WEST 86TH STREET WB

03.39 N I-65, Marion, IN

Built 2005 ADT: 17,969

NW LOOP RAMP TO I-

Over: WEST 86TH STREET WB

03.39 N of I-65, Marion, IN

Built 2005 ADT: 17,969

W 79TH STREET

Over: I-465 NB

02.39 N I-65, Marion, IN

Built 2004 ADT: 50,616

I-465 RAMP to 73RD

Over: 71ST ST EB

01.39 N I-65, Marion, IN

Built 2007 ADT: 9,941

I-465 NB

Over: WEST 71ST STREET - EB

01.39 N of I-65, Marion, IN

Built 2005 ADT: 9,667

I-465 SB, NWL RAMP

Over: EB W 71ST STREET

01.39 N of I-65, Marion, IN

Built 2005 ADT: 12,171

OLD US 52

Over: I-465 NB

00.17 N I-65, Marion, IN

Built 1959 ADT: 61,744

I-65 NB RAMP

Over: I-465 SB

00.16 S I-65, Marion, IN

Built 1959 ADT: 17,447

W 56TH ST EB

Over: I-465 NB

00.79 S I-65, Marion, IN

Built 1995 ADT: 51,179

W 56TH ST WB

Over: I-465 NB

00.78 S I-65, Marion, IN

Built 1995 ADT: 51,179

RAMP I465NB-I74WB

Over: I-465 SB EXIT RAMP

03.00 N US 36, Marion, IN

Built 2012 ADT: 7,539

RAMP I465NB-I74WB

Over: I-465 NB

02.96 N US 36, Marion, IN

Built 2012 ADT: 67,873

RAMP I74EB-I465SB

Over: I-465 SB EXIT RAMP

02.91 N US 36, Marion, IN

Built 2012 ADT: 7,539

RAMP I74EB-I465NB

Over: RAMP I-74 EB to US 136

02.75 N US 36, Marion, IN

Built 2012 ADT: 9,946

I-465 NB

Over: US 136 EB

02.57 N US 36, Marion, IN

Built 2012 ADT: 15,296

I-465 SB

Over: US 136 WB

02.57 N US 36, Marion, IN

Built 2012 ADT: 15,437

I-465 NB

Over: SR 67 NB

00.79 S I-70 W Side, Marion, IN

Built 1961 ADT: 14,500

I-465 SB

Over: SR 67 SB

00.79 S I-70, Marion, IN

Built 1961 ADT: 14,500

MOORESVILLE ROAD

Over: I-465 WB

00.34 E SR 67, Marion, IN

Built 2022 ADT: 48,138

MANN ROAD

Over: I-465 WB

01.19 E SR 67, Marion, IN

Built 2022 ADT: 58,560

I-465 WB

Over: SR 37 NBL

01.58 W SR 135, Marion, IN

Built 1961 ADT: 15,500

I-465 EB

Over: BLUFF RD NB & SB

00.77 W SR 135, Marion, IN

Built 1962 ADT: 12,665

I-465 WB

Over: BLUFF RD NB & SB

00.77 W SR 135, Marion, IN

Built 1962 ADT: 12,665

I-465 EB

Over: MERIDIAN ST NB

01.74 W US 31, Marion, IN

Built 1962 ADT: 7,400

I-465 WB

Over: MERIDIAN ST SB

01.74 W US 31, Marion, IN

Built 1962 ADT: 8,360

US 31 SB RAMP

Over: I-465 WB

00.10 W US-31, Marion, IN

Built 1962 ADT: 44,678

US 31 NB RAMP

Over: I-465 EB

00.10 E US 31, Marion, IN

Built 1962 ADT: 46,611

LOUISVILLE & IN RR

Over: I-465 EB

00.71 E US 31, Marion, IN

Built 1963 ADT: 46,611

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026