Logan County, CO

182 public highway bridges

Logan County Bridge Snapshot

Logan County, Colorado contains 182 public highway bridges in the FHWA National Bridge Inventory. Roughly 29.7% are rated “Good,” 52.7% “Fair,” 8.8% “Poor,” and 8.8% 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 CO 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.

182
Total Bridges
29.7%
Good
8.8%
Poor
8.8%
Structurally Deficient

Condition Distribution

Good
29.7% (54)
Fair
52.7% (96)
Poor
8.8% (16)
SD
8.8% (16)

All Bridges (182)

US 138 ML

Fair

Over: SPRING CANYON CREEK

5.6 MI N OF PROCTOR, Logan, CO

Built 1979 Load: 50.0 t ADT: 450

I 76 ML WBND

Fair

Over: COUNTY ROAD 67

8 MI SW OF CROOK, Logan, CO

Built 1966 Load: 53.5 t ADT: 3,800

I 76 ML EBND

Fair

Over: COUNTY ROAD 67

8 MI SW OF CROOK, Logan, CO

Built 1966 Load: 53.5 t ADT: 3,800

County Road 35

Fair

Over: Pawnee Ditch

20 Ft. N. of Sage Drive, Logan, CO

Built 1992 Load: 53.6 t ADT: 463

County Road 40

Fair

Over: South Platte River

0.7 Mi E of US Hwy 138, Logan, CO

Built 1988 Load: 54.2 t ADT: 127

County Road 29.8

Fair

Over: South Platte River

0.2 Mi. NW of Co Rd 12, Logan, CO

Built 1988 Load: 54.7 t ADT: 66

County Road 29.6

Fair

Over: S. Platte River Overflow

0.5 Mi. NW of Co. Rd. 18, Logan, CO

Built 1988 Load: 56.3 t ADT: 66

County Road 20.5

Fair

Over: N. Sterling Inlet Canal

At Jct with Co Rd 23, Logan, CO

Built 2000 Load: 59.1 t ADT: 83

US 138 ML

Fair

Over: HARMONY DITCH NO 2

14.7 MI NE OF JCT SH 113, Logan, CO

Built 1993 Load: 74.0 t ADT: 450

County Road 55

Fair

Over: Lewis Creek

1.3 Mi N of Co Rd 52, Logan, CO

Built 2004 Load: 96.9 t ADT: 29

County Road 11.1

Fair

Over: Pawnee Creek

1.9 MI N of St Hwy 14, Logan, CO

Built 1998 Load: 99.9 t ADT: 17

County Road 7.4

Fair

Over: Spring Creek

0.1 Mi S of Co Rd 38, Logan, CO

Built 1975 Load: 99.9 t ADT: 21

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1 MI S OF JCT SH55+US138, Logan, CO

Built 1987 Load: 17.5 t ADT: 460

County Road 55

Good

Over: S. PLATTE RIVER OVERFLOW

1.2 Mi S of US Hwy 138, Logan, CO

Built 2013 Load: 20.1 t ADT: 345

US 138 ML

Good

Over: ILIFF DRAIN DITCH

4 MI N OF JCT SH 113, Logan, CO

Built 1978 Load: 21.7 t ADT: 690

County Road 18

Good

Over: N. Sterling Inlet Canal

25 Ft. W. of Co. Rd. 25, Logan, CO

Built 1987 Load: 21.9 t ADT: 202

County Road 65

Good

Over: N. Sterling Outlet Canal

20 Ft S of Co Rd 64, Logan, CO

Built 1997 Load: 29.3 t ADT: 39

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1.3 MI S OF JCT SH55+US13, Logan, CO

Built 1987 Load: 29.4 t ADT: 460

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1.4 MI S OF JCT SH55+US13, Logan, CO

Built 1987 Load: 29.4 t ADT: 460

SH 55 ML

Good

Over: SOUTH PLATTE RIVER

1.5 MI S OF JCT SH55+US13, Logan, CO

Built 1987 Load: 29.4 t ADT: 460

County Road 34

Good

Over: Sterling Ditch No 1

0.4 Mi E of Co Rd 41, Logan, CO

Built 1994 Load: 31.0 t ADT: 313

County Road 16.5

Good

Over: Pawnee Ditch

0.1 Mi. E. of Co. Rd. 29, Logan, CO

Built 1999 Load: 31.5 t ADT: 244

County Road 93

Good

Over: S. Platte River Overflow

1.2 Mi N of I-76, Logan, CO

Built 2002 Load: 31.6 t ADT: 58

County Road 24

Good

Over: Pawnee Ditch

0.1 Mi E of Co Rd 33, Logan, CO

Built 2004 Load: 31.7 t ADT: 285

County Road 91

Good

Over: Trib.N.Fork Frenchman Ck

0.9 Mi N of Co Rd 28, Logan, CO

Built 1997 Load: 31.8 t ADT: 87

SH 6 ML

Good

Over: PAWNEE CREEK

4.9 MI S OF SH 14, Logan, CO

Built 2005 Load: 31.9 t ADT: 3,700

County Road 23

Good

Over: N. Sterling Inlet Canal

1.0 Mi. N. of Co. Rd. 23, Logan, CO

Built 1999 Load: 32.1 t ADT: 114

County Road 68

Good

Over: Harmony No. 1 Canal

At Junct. of Co Rd 95/68, Logan, CO

Built 2001 Load: 32.6 t ADT: 13

County Road 20

Good

Over: Pawnee Ditch

0.7 Mi E of Co Rd 29, Logan, CO

Built 2011 Load: 32.7 t ADT: 33

County Road 78

Good

Over: Cottonwood Creek

0.3 Mi E of Co Rd 67, Logan, CO

Built 1970 Load: 32.7 t ADT: 44

County Road 2.5

Good

Over: Prewitt Outlet Canal

0.5 MI W of US HWY 6, Logan, CO

Built 2011 Load: 33.0 t ADT: 27

County Road 27

Good

Over: Pawnee Ditch

0.7 Mi North of Co. Rd 12, Logan, CO

Built 2009 Load: 33.5 t ADT: 34

SH 63 ML

Good

Over: SPRINGDALE CANAL

27.4 MI N OF JCT US 34, Logan, CO

Built 1965 Load: 33.8 t ADT: 2,000

County Road 33

Good

Over: Pawnee Creek

1.1 Mi. N. of CR 18, Logan, CO

Built 1991 Load: 34.1 t ADT: 246

County Road 89

Good

Over: Duck Cr / Settlers Ditch

0.4 Mi N of U.S. Hwy 138, Logan, CO

Built 1995 Load: 34.2 t ADT: 43

County Road 71

Good

Over: N. Sterling Outlet Canal

0.7 Mi N of Co Rd 66, Logan, CO

Built 1993 Load: 34.4 t ADT: 99

County Road 85

Good

Over: Harmony No. 1 Canal

1.4 Mi N of US Hwy 138, Logan, CO

Built 2006 Load: 34.4 t ADT: 25

County Road 33.5

Good

Over: N Sterling Inlet Canal

0.2 Mi S of Co Rd 38, Logan, CO

Built 1997 Load: 34.7 t ADT: 33

SH 138 ML

Good

Over: DRAIN DITCH

6.6 MI NE of JCT US 6, Logan, CO

Built 2020 Load: 35.6 t ADT: 2,500

County Road 35

Good

Over: Springdale Ditch

0.6 Mi. N. of Co. Rd. 24, Logan, CO

Built 1993 Load: 36.5 t ADT: 647

I 76 ML WBND

Good

Over: BNSF RR

38.3 MI SE OF JCT SH 59, Logan, CO

Built 1966 Load: 36.8 t ADT: 4,150

County Road 37

Good

Over: Cedar Creek

0.7 Mi S of Co Rd 46, Logan, CO

Built 1987 Load: 37.1 t ADT: 434

County Road 40

Good

Over: Cedar Creek

0.3 Mi E of US138, Logan, CO

Built 2013 Load: 37.9 t ADT: 133

County Road 46

Good

Over: Iliff Platte Valley Dtch

1.6 Mi. E of St Hwy 113, Logan, CO

Built 2002 Load: 38.4 t ADT: 155

Platte Street

Good

Over: Pioneer Drainage Ditch

At 12th Avenue, Logan, CO

Built 1995 Load: 38.5 t ADT: 1,364

County Road 55

Good

Over: Iliff Platte Valley Ditc

1.4 Mi N of US Hwy 138, Logan, CO

Built 1989 Load: 39.0 t ADT: 126

County Road 71

Good

Over: Harmony No. 2 Ditch

1.1 Mi N of US Hwy 138, Logan, CO

Built 1996 Load: 39.1 t ADT: 168

County Road 25

Good

Over: South Platte River

0.6 MI S of US HWY 6, Logan, CO

Built 1996 Load: 39.4 t ADT: 172

County Road 40

Good

Over: Cedar Creek

1.9 Mi E of Co Rd 43, Logan, CO

Built 1995 Load: 39.5 t ADT: 97

County road 54

Good

Over: N. Sterling Outlet Canal

0.5 Mi W of SH113, Logan, CO

Built 1994 Load: 39.5 t ADT: 9

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