Allen County, IN

601 public highway bridges

Allen County Bridge Snapshot

Allen County, Indiana contains 601 public highway bridges in the FHWA National Bridge Inventory. Roughly 30.3% are rated “Good,” 47.9% “Fair,” 6.8% “Poor,” and 6.8% 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.

601
Total Bridges
30.3%
Good
6.8%
Poor
6.8%
Structurally Deficient

Condition Distribution

Good
30.3% (182)
Fair
47.9% (288)
Poor
6.8% (41)
SD
6.8% (41)

All Bridges (601)

SR 37

Good

Over: PORTER CREEK

01.52 N SR 101, Allen, IN

Built 2022 Load: 73.2 t ADT: 3,000

GROVE ST

Good

Over: SPY RUN CREEK

00.10 E OF WESTBROOK DR, Allen, IN

Built 1968 Load: 76.8 t ADT: 1,539

EDSALL AVE

Good

Over: NORFOLK SOUTHERN R/R

00.10 S OF MCDONALD ST, Allen, IN

Built 2019 Load: 81.8 t ADT: 2,625

SR 1

Good

Over: WATSON DITCH

09.07 S SR 8, Allen, IN

Built 1941 Load: 90.7 t ADT: 2,700

UNION CHAPEL RD

Good

Over: BELOT DRAIN

00.75 E AUBURN ROAD, Allen, IN

Built 1985 Load: 90.7 t ADT: 5,000

AIRPORT EXPY

Good

Over: WELLBAUM DRAIN

00.06 E COVERDALE RD, Allen, IN

Built 1995 Load: 90.7 t ADT: 10,125

SR 101

Good

Over: SMITH-FRY DITCH

02.23 S SR 37, Allen, IN

Built 1991 Load: 97.2 t ADT: 1,157

I-469

Good

Over: SIX MILE CREEK

01.90 N US 24, Allen, IN

Built 1992 Load: 97.2 t ADT: 33,629

I-469

Good

Over: MARTIN DITCH

01.19 E I-69, Allen, IN

Built 1995 Load: 97.2 t ADT: 44,507

US 24

Good

Over: GROVER DITCH

03.88 W SR 101, Allen, IN

Built 2010 Load: 97.2 t ADT: 17,611

E LINCOLN HWY

Poor

Over: FLATROCK CREEK OVERFLOW

00.51 W LORTIE ROAD, Allen, IN

Built 1935 Load: 6.2 t ADT: 156

HAMILTON RD

Poor

Over: REBECCA KNIGHT DRAIN

00.80 W ABOITE ROAD, Allen, IN

Built 1883 Load: 8.2 t ADT: 175

WOODBURN RD

Poor

Over: GROVER DRAIN #2

00.10 W OF ROUSSEY ROAD, Allen, IN

Built 1972 Load: 8.8 t ADT: 4,225

KELL RD

Poor

Over: WILLOW CREEK

00.40 N OF CEDAR CANYONS, Allen, IN

Built 1974 Load: 14.0 t ADT: 150

VAN ZILE RD

Poor

Over: ST JOSEPH RIVER

00.40 N OF HURSHTOWN ROAD, Allen, IN

Built 1883 Load: 16.3 t ADT: 200

SLUSHER RD

Poor

Over: EDGERTON-CARSON DRAIN

00.01 W OF BROBST ROAD, Allen, IN

Built 1935 Load: 18.8 t ADT: 175

REED RD

Poor

Over: PIERSON DRAIN #2

00.10 N OF CARIBE BLVD, Allen, IN

Built 1976 Load: 20.9 t ADT: 308

MONROEVILLE RD

Poor

Over: FLATROCK CREEK

00.10 E OF SR 101, Allen, IN

Built 1975 Load: 21.3 t ADT: 1,148

LIBERTY MILLS RD

Poor

Over: ABOITE CREEK

00.60 W OF HAMILTON RD, Allen, IN

Built 1968 Load: 22.5 t ADT: 536

ELIZABETH ST

Poor

Over: SPY RUN CREEK

00.10 E OF CLINTON ST, Allen, IN

Built 1993 Load: 22.5 t ADT: 7,525

FISHER RD

Poor

Over: JAMES T. JOHNSON DRAIN

00.30 W OF FELGER RD, Allen, IN

Built 1970 Load: 22.9 t ADT: 125

ANTWERP RD

Poor

Over: OBERHALTZER DITCH

00.20 W TRAMMEL ROAD, Allen, IN

Built 1970 Load: 23.0 t ADT: 150

TAMARACK DR

Poor

Over: SHOPPMAN DRAIN

00.10 W OF REED RD, Allen, IN

Built 1971 Load: 24.1 t ADT: 462

LAHMEYER RD

Poor

Over: BULLERMAN DRAIN

00.20 N OF STELLHORN RD, Allen, IN

Built 1970 Load: 24.9 t ADT: 8,050

IRON BRIDGE RD

Poor

Over: NATURAL DRAIN

00.30 N OF KRESS RD, Allen, IN

Built 1976 Load: 24.9 t ADT: 102

CLINTON ST

Poor

Over: BECKETT RUN

00.50 N AUBURN RD, Allen, IN

Built 1948 Load: 26.5 t ADT: 20,000

MONROEVILLE RD

Poor

Over: HOFFMAN DRAIN

00.10 W OF FACKLER RD, Allen, IN

Built 1960 Load: 27.0 t ADT: 1,071

WINTERS RD

Poor

Over: HARBER DRAIN

00.10 E BLUFFTON RD, Allen, IN

Built 1976 Load: 27.2 t ADT: 224

MEYER RD

Poor

Over: TRIER DRAIN

00.50 N PAULDING RD, Allen, IN

Built 1969 Load: 28.3 t ADT: 2,525

CUBA RD

Poor

Over: OBERHALTZER DITCH

00.05 N OF GRABILL ROAD, Allen, IN

Built 1937 Load: 28.5 t ADT: 1,150

COLUMBIA ST

Poor

Over: DELTA LAKE

00.10 W OF DELTA BLVD, Allen, IN

Built 1939 Load: 29.4 t ADT: 10,025

AMBER RD

Poor

Over: LITTLE RIVER

00.90 S OF US 24, Allen, IN

Built 1935 Load: 30.1 t ADT: 102

IRON BRIDGE RD

Poor

Over: NATURAL DRAIN

00.55 S OF ERNST ROAD, Allen, IN

Built 1976 Load: 30.9 t ADT: 102

PAULDING RD

Poor

Over: TRIER DRAIN

00.30 W WAYNE TRACE, Allen, IN

Built 1966 Load: 31.4 t ADT: 9,025

FOURTH ST

Poor

Over: SPY RUN CREEK

00.10 W OF SPY RUN AVE, Allen, IN

Built 1921 Load: 32.7 t ADT: 3,025

HOMESTEAD RD

Poor

Over: LITTLE RIVER

00.70 S OF US 24, Allen, IN

Built 1977 Load: 33.8 t ADT: 1,581

BARKLEY RD

Poor

Over: BROWN DRAIN

00.20 E OF WHITTERN RD, Allen, IN

Built 1975 Load: 35.3 t ADT: 112

S COUNTY LINE RD

Poor

Over: ST MARYS RIVER

00.75 E WINCHESTER ROAD, Allen, IN

Built 1983 Load: 35.4 t ADT: 156

SMITH RD

Poor

Over: ROBINSON-BRINDLE DRAIN

00.20 S OF INDIANAPOLIS R, Allen, IN

Built 1974 Load: 37.7 t ADT: 128

MILAN CENTER RD

Poor

Over: BOTTERON DRAIN

00.30 N OF DOTY ROAD, Allen, IN

Built 1973 Load: 38.6 t ADT: 179

RUPERT RD

Poor

Over: WERTZ DITCH

00.16 MI N NOTESTINE ROA, Allen, IN

Built 1970 Load: 38.6 t ADT: 200

MULDOON RD

Poor

Over: SNYDER DRAIN

00.30 N FERGUSON ROAD, Allen, IN

Built 1976 Load: 39.6 t ADT: 1,692

FERGUSON RD

Poor

Over: ST MARYS RIVER

00.10 E MULDOON RD, Allen, IN

Built 1972 Load: 44.5 t ADT: 5,750

PARENT RD

Poor

Over: SIX MILE CREEK

00.30 W RIVER RUN ROAD, Allen, IN

Built 1978 Load: 47.4 t ADT: 26

SUMMIT ST

Poor

Over: A. MARTIN DRAIN

00.20 E OF GREEN ST, Allen, IN

Built 1970 Load: 49.1 t ADT: 1,683

LOWER HUNTINGTON R

Poor

Over: ST MARYS RIVER

00.10 W OF FAIRFIELD AVE, Allen, IN

Built 1960 Load: 50.3 t ADT: 15,050

GOEGLEIN RD

Structurally Deficient

Over: BULLERMAN DRAIN

00.20 S OF TRIER RD, Allen, IN

Built 1969 Load: 3.6 t ADT: 769

MAIN ST

Structurally Deficient

Over: TRIER DRAIN

00.10 W OF STATE ST, Allen, IN

Built 1970 Load: 6.4 t ADT: 974

BLUFFTON RD

Structurally Deficient

Over: HARBER DRAIN

00.02 S WINTERS RD, Allen, IN

Built 1927 Load: 23.5 t ADT: 12,025

TILLMAN RD

Structurally Deficient

Over: HIGHLAND DRAIN 4

00.20 W OF S HANNA ST, Allen, IN

Built 1966 Load: 34.3 t ADT: 12,125

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

Related

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