US Bridges

FM J Ave. over Rock Creek

Good

Cherokee County, Iowa · 091411502 · Structure no. 000000000108371

Built
2011
14 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
60 ft
2 main spans
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

FM J Ave. over Rock Creek is a concrete stringer/multi-beam or girder carrying FM J Ave. over Rock Creek in Cherokee County, Iowa. It was built in 2011, so it is 14 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, roughly 27% of them trucks, projected to reach 15 by 2043. The structure is 60 ft (18.3 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFM J Ave.
CrossesRock Creek
Location091411502
RouteCounty Highway 0
CountyCherokee County
StateIowa
Coordinates42.69869, -95.6817
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic15 by 2043
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FM J Ave. over Rock Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is FM J Ave. over Rock Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does FM J Ave. over Rock Creek carry?

About 15 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is FM J Ave. over Rock Creek?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns FM J Ave. over Rock Creek?

It is owned by the County Highway Agency.