Lyon County, KS

493 public highway bridges

Lyon County Bridge Snapshot

Lyon County, Kansas contains 493 public highway bridges in the FHWA National Bridge Inventory. Roughly 59.6% are rated “Good,” 31.2% “Fair,” 1% “Poor,” and 1% 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 KS 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.

493
Total Bridges
59.6%
Good
1%
Poor
1%
Structurally Deficient

Condition Distribution

Good
59.6% (294)
Fair
31.2% (154)
Poor
1% (5)
SD
1% (5)

All Bridges (493)

RD 310 929.4-492.0

Fair

Over: STREAM

2.5S 2.5W OF BUSHONG, Lyon, KS

Built 1940 Load: 25.8 t ADT: 10

I-35 HWY SB (KTA)

Fair

Over: COTTONWOOD R OVFL,RD

9.04 MI NE CHASE CO LINE, Lyon, KS

Built 1956 Load: 26.2 t ADT: 8,600

RS 416 U.O-11.5

Fair

Over: 142 MILE CREEK

1.5W 3.5N OF READING, Lyon, KS

Built 1938 Load: 26.3 t ADT: 51

RD 170 931.5-520

Fair

Over: LINDY CREEK

0.5S 2.0E OF PLYMOUTH, Lyon, KS

Built 1921 Load: 27.9 t ADT: 50

RD C (16.8-C.0)

Fair

Over: TRIB. TO NEOSHO RIVER

3.0W 0.8S OF AMERICUS, Lyon, KS

Built 1996 Load: 28.0 t ADT: 30

CNTY RD 400-P.3

Fair

Over: ELM CREEK

6.5N OF ADMIRE, Lyon, KS

Built 1946 Load: 28.2 t ADT: 10

RD. 330 (Q.0-7.0)

Fair

Over: STREAM

2.0E OF ADMIRE, Lyon, KS

Built 2004 Load: 28.2 t ADT: 10

CTY RD L 945-478.4

Fair

Over: STREAM

3.0N OF ALLEN, Lyon, KS

Built 1959 Load: 28.6 t ADT: 25

RD. K 943.0-532.3

Fair

Over: COAL CREEK

1.2W 3.2N OF OLPE, Lyon, KS

Built 1927 Load: 28.7 t ADT: 30

RD 160 967.1-522

Fair

Over: PLUM CREEK

1.0E 1.0N NEOSHO RAPIDS, Lyon, KS

Built 2009 Load: 28.8 t ADT: 50

RD 170 (D.1-23.0)

Fair

Over: STREAM

7.0S 1.9W OF AMERICUS, Lyon, KS

Built 2003 Load: 29.1 t ADT: 50

I-335 HWY (KTA) SB

Fair

Over: ELM CREEK

1.19 MI NE US-56, Lyon, KS

Built 1956 Load: 29.1 t ADT: 5,650

RD. 120 931.1-530

Fair

Over: Phenis Branch

3.5S&6.5W of Emporia, Lyon, KS

Built 2003 Load: 29.7 t ADT: 20

CNTY RD. 395

Fair

Over: STREAM

6.0N & 3.0E OF ADMIRE, Lyon, KS

Built 1998 Load: 30.0 t ADT: 25

RD Y 967.0-546.1

Fair

Over: FOUR MILE CREEK

6.0S 1.0W OF HARTFORD, Lyon, KS

Built 1979 Load: 30.0 t ADT: 30

RS 1120 20.0-A.5

Fair

Over: STREAM

5.0S 10.0W OF OLPE, Lyon, KS

Built 1992 Load: 30.5 t ADT: 9

RD A 925.0-498.4

Fair

Over: TRIB. TO WRIGHT CREEK

3.6N 5.0W OF AMERICUS, Lyon, KS

Built 1994 Load: 30.5 t ADT: 10

RD. 50 957.3-544.0

Fair

Over: STREAM

2.0S 5.8E OF OLPE, Lyon, KS

Built 2004 Load: 30.7 t ADT: 20

RD E 933.0-528.3

Fair

Over: STREAM

5.0S 2.8E OF PLYMOUTH, Lyon, KS

Built 2015 Load: 30.8 t ADT: 10

RD H2 939.2-496.2

Fair

Over: TRIBUTARY TO ALLEN CREEK

4.9N&2.25E OF AMERICUS, Lyon, KS

Built 2000 Load: 30.8 t ADT: 20

RD W 963-530.1

Fair

Over: STREAM

1.5N 2.5W OF HARTFORD, Lyon, KS

Built 2003 Load: 30.8 t ADT: 20

RD E 933.5-520

Fair

Over: MOON CREEK

7.0S 0.5W OF AMERICUS, Lyon, KS

Built 2003 Load: 30.9 t ADT: 30

I-35 HWY SB

Fair

Over: BNSF RAILWAY

1.65 MI SE K99 SB, Lyon, KS

Built 1966 Load: 31.8 t ADT: 7,650

I-35 HWY NB

Fair

Over: BNSF RAILWAY

1.64 MI EAST OF K-99, Lyon, KS

Built 1966 Load: 31.8 t ADT: 7,650

RD. M 947-530.9

Fair

Over: COAL CREEK

4.0N 1.0E OF OLPE, Lyon, KS

Built 1992 Load: 32.5 t ADT: 40

RS 412 F.5-18.2

Fair

Over: PESTER CREEK

0.5E 1.0S OF AMERICUS, Lyon, KS

Built 1965 Load: 32.7 t ADT: 2,599

RD U (R.0-18.3)

Fair

Over: STREAM

1.0N 2.0E OF LANG, Lyon, KS

Built 1957 Load: 32.7 t ADT: 206

RD 200 (P.1-200.0)

Fair

Over: PLUMB CREEK

1.0N 1.0E OF EMPORIA, Lyon, KS

Built 1940 Load: 32.7 t ADT: 100

COUNTY RD. 390,P.0

Fair

Over: STREAM

5.5N OF ADMIRE, Lyon, KS

Built 1985 Load: 33.1 t ADT: 5

RD 40 965.5-546.0

Fair

Over: STREAM

1.5W 6.5S OF HARTFORD, Lyon, KS

Built 1984 Load: 34.1 t ADT: 20

RS 412 33.0-J.6

Fair

Over: EAGLE CREEK

0.5W OF OLPE, Lyon, KS

Built 1938 Load: 34.4 t ADT: 466

I-35 HWY NB

Fair

Over: K-130 HWY

JCT I35 & K-130 HWY, Lyon, KS

Built 1975 Load: 34.4 t ADT: 8,050

RD 320 947.6-490

Fair

Over: DUCK CREEK

2.0S 1.6E OF ALLEN, Lyon, KS

Built 1994 Load: 34.8 t ADT: 45

I-35 HWY NB

Fair

Over: NEOSHO RIVER

3.69 MI EAST OF K-99, Lyon, KS

Built 1976 Load: 36.3 t ADT: 8,350

I-35 HWY SB

Fair

Over: BADGER CREEK

6.84 MI EAST OF K-99, Lyon, KS

Built 1976 Load: 37.2 t ADT: 8,150

I-35 HWY NB

Fair

Over: BADGER CREEK

6.85 MI EAST OF K-99, Lyon, KS

Built 1976 Load: 37.2 t ADT: 8,150

RD 150 963.5-524.0

Fair

Over: DRY CREEK

N. EDGE OF NEOSHO RAPIDS, Lyon, KS

Built 1988 Load: 38.0 t ADT: 20

K99 HWY

Fair

Over: COTTONWOOD RIVER

1.49 MI S US50, Lyon, KS

Built 1987 Load: 39.9 t ADT: 3,850

US-56 HWY

Fair

Over: ELM CREEK

1.55 MI E KTA, Lyon, KS

Built 1991 Load: 40.5 t ADT: 580

K99 HWY

Fair

Over: DOW CREEK

0.38 MI E/KTA, Lyon, KS

Built 1985 Load: 41.7 t ADT: 595

I-35 HWY SB (KTA)

Fair

Over: COTTONWOOD RIVER

8.50 MI NE CHASE CO LINE, Lyon, KS

Built 1956 Load: 42.9 t ADT: 8,600

RD 225 933.5-508.0

Fair

Over: STREAM

1.0S 0.5W OF AMERICUS, Lyon, KS

Built 1987 Load: 44.1 t ADT: 20

RS 412 F.5-16.6

Fair

Over: STREAM

S.E. COR. OF AMERICUS, Lyon, KS

Built 1965 Load: 46.9 t ADT: 2,599

RD 270 (N.7-270)

Fair

Over: STREAM

3.0N 8.0E OF AMERICUS, Lyon, KS

Built 1988 Load: 61.1 t ADT: 30

RS 1507 I.0-26.2

Good

Over: DRY CREEK

3.0S 1.5W OF EMPORIA, Lyon, KS

Built 1968 Load: 8.2 t ADT: 197

RS 412 30.8-F.0

Good

Over: STREAM

5.0W 2.0N OF OLPE, Lyon, KS

Built 1950 Load: 8.3 t ADT: 193

CTY RD 360

Good

Over: ELM CREEK

2.5N 4.0E OF ADMIRE, Lyon, KS

Built 1950 Load: 8.3 t ADT: 20

RD 395_955.7-474.5

Good

Over: CHICKEN CREEK

6.0N 2.0E OF ADMIRE, Lyon, KS

Built 1983 Load: 9.1 t ADT: 25

RD 60 953.1-542.0

Good

Over: HARPER CREEK

1.0S 4.0E OF OLPE, Lyon, KS

Built 1950 Load: 10.7 t ADT: 66

COUNTY RD. L

Good

Over: 142 MILE CREEK

5.5N OF ALLEN, Lyon, KS

Built 1953 Load: 12.6 t ADT: 25

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