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Parker Trail over Small Creek

Harrison County, Iowa · rated Poor in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled

View this bridge on a map → (41.66763, -95.74177)

Component ratings

ComponentRating (2024)Rating (2025)FHWA scale meaning
Deck55Fair condition
Superstructure55Fair condition
Substructure33Serious condition

Bridge details

StructureConcrete stringer or multi-beam girder
Lengthabout 32 ft
Location079420904
NBI structure number000000000178020
Condition classPoor
Traffic status (item 41)Open, no restriction
Last inspection (item 90)December 2022
Inspection interval (item 91)24 months
Scour (item 113)3: scour critical: foundations unstable for the assessed or calculated scour

Source: FHWA National Bridge Inventory, 2025 data as reported by the Iowa department of transportation.

Busiest bridges in Harrison County

BridgeBuiltVehicles/dayCondition
US 30 over Willow Creek197210,300Fair
US 30 over UPRR199810,300Good
NB I-29 over Boyer River195810,050Fair
SB I-29 over Boyer River195810,050Fair
SB I-29 over over UP RR19677,750Fair
NB I-29 over Allen Creek19677,750Fair

All bridges nearby: Harrison County, IA bridge conditions · every bridge in Harrison County · Iowa bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.