US Bridges

Fir RD over Mosquito Creek

Good

Shelby County, Iowa · 080401202 · Structure no. 000000000306651

Built
2016
9 years old
Condition
Good
inspected April 2020
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
189 ft
3 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

Fir RD over Mosquito Creek is a prestressed concrete stringer/multi-beam or girder carrying Fir RD over Mosquito Creek in Shelby County, Iowa. It was built in 2016, so it is 9 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 50 vehicles a day, projected to reach 50 by 2043. The structure is 189 ft (57.5 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFir RD
CrossesMosquito Creek
Location080401202
RouteCounty Highway 0
StateIowa
Coordinates41.75874, -95.46061
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 inspectionApril 2020
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating46.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length189 ft (57.5 m)
Longest span69 ft (21 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fir RD over Mosquito Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Fir RD over Mosquito 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 April 2020.

How much traffic does Fir RD over Mosquito Creek carry?

About 50 vehicles per day (2022 count).

How long is Fir RD over Mosquito Creek?

The structure is 189 ft (57.5 m) long with a longest span of 69 ft (21 m) and a deck 27 ft wide.

Who owns Fir RD over Mosquito Creek?

It is owned by the County Highway Agency.