Grundy County, IA

270 public highway bridges

Grundy County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Grundy County, Iowa contains 270 public highway bridges. Roughly 37.4% are rated “Good,” 30% “Fair,” and 25.9% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

270
Total Bridges
37.4%
Good
30%
Fair
25.9%
Poor Condition

Condition Distribution

Good
37.4% (101)
Fair
30% (81)
Poor
25.9% (70)

All Bridges (270)

LOCAL ROAD

Poor

Over: BRANCH OF WOLF CREEK

086172602, Grundy, IA

Built 1976 Load: 28.4 t ADT: 59

FM

Poor

Over: MOSQUITO CREEK

087152902, Grundy, IA

Built 1977 Load: 29.9 t ADT: 501

FM

Poor

Over: BLACKHAWK CREEK

088173602, Grundy, IA

Built 1971 Load: 29.9 t ADT: 1,935

LOCAL ROAD

Poor

Over: BRANCH OF WOLF CREEK

086172901, Grundy, IA

Built 1976 Load: 30.6 t ADT: 11

LOCAL

Poor

Over: LITTLE WOLF CREEK

086170201, Grundy, IA

Built 1976 Load: 30.8 t ADT: 33

FM

Poor

Over: BLACK HAWK CREEK

087152202, Grundy, IA

Built 1973 Load: 30.8 t ADT: 412

LOCAL

Poor

Over: MOSQUITO CREEK

087163302, Grundy, IA

Built 1983 Load: 30.8 t ADT: 33

LOCAL RD

Poor

Over: BRANCH BLACKHAWK CREEK

088172601, Grundy, IA

Built 1956 Load: 31.0 t ADT: 15

FM

Poor

Over: BLACK HAWK CREEK

087152002, Grundy, IA

Built 1979 Load: 31.4 t ADT: 687

FM

Poor

Over: BRANCH BLACK HAWK CREEK

087150302, Grundy, IA

Built 1973 Load: 32.7 t ADT: 412

FM

Poor

Over: WOLF CREEK, BRANCH

086170801, Grundy, IA

Built 1972 Load: 32.8 t ADT: 285

FM

Poor

Over: BEAVER CREEK

089172201, Grundy, IA

Built 1973 Load: 36.3 t ADT: 501

FM

Poor

Over: BEAVER CREEK ,BRANCH

088181705, Grundy, IA

Built 1932 Load: 37.1 t ADT: 265

FM

Poor

Over: DOWD CREEK

086183004, Grundy, IA

Built 1972 Load: 37.6 t ADT: 491

NICKEL AVE

Poor

Over: MUNNS CREEK

087163004, Grundy, IA

Built 1955 Load: 41.5 t ADT: 216

FM

Poor

Over: DOWD CREEK

087183301, Grundy, IA

Built 1964 Load: 43.5 t ADT: 98

FM

Poor

Over: BLACKHAWK CREEK ,BRANCH

088162101, Grundy, IA

Built 1956 Load: 44.7 t ADT: 177

LOCAL

Poor

Over: MUNNS CREEK

087163003, Grundy, IA

Built 1957 Load: 46.7 t ADT: 20

FM

Poor

Over: WOLF CREEK, BRANCH

086170704, Grundy, IA

Built 1972 Load: 60.4 t ADT: 373

FM

Poor

Over: WOLF CREEK, BRANCH

086173201, Grundy, IA

Built 1975 Load: 99.9 t ADT: 1,394

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.