US Bridges

Railroad HWY over Mosquito Creek

Fair

Pottawattamie County, Iowa · 075430208 · Structure no. 000000000044070

Built
1963
62 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
205 ft
3 main spans
Daily traffic
2,071
2022 count
Owner
County
County Highway Agency

About this bridge

Railroad HWY over Mosquito Creek is a steel continuous stringer/multi-beam or girder carrying Railroad HWY over Mosquito Creek in Pottawattamie County, Iowa. It was built in 1963, so it is 62 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,071 vehicles a day, roughly 7% of them trucks, projected to reach 2,071 by 2044. The structure is 205 ft (62.5 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRailroad HWY
CrossesMosquito Creek
Location075430208
RouteCounty Highway 0
CountyPottawattamie County
StateIowa
Coordinates41.3305, -95.74984
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span78 ft (23.8 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,071 (2022)
Projected traffic2,071 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Railroad HWY over Mosquito Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is Railroad HWY over Mosquito Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Railroad HWY over Mosquito Creek carry?

About 2,071 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Railroad HWY over Mosquito Creek?

The structure is 205 ft (62.5 m) long with a longest span of 78 ft (23.8 m) and a deck 36 ft wide.

Who owns Railroad HWY over Mosquito Creek?

It is owned by the County Highway Agency.