US Bridges

Ia 9 over Mud Creek

Fair

Lyon County, Iowa · 0.2 Mi. W of Jct. SR K30 · Structure no. 000000000034601

Built
1975
50 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
3,270
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 9 over Mud Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 9 over Mud Creek in Lyon County, Iowa. It was built in 1975, so it is 50 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 6 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 3,270 vehicles a day, roughly 14% of them trucks, projected to reach 3,270 by 2043. The structure is 184 ft (56.1 m) long and 48 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesIa 9
CrossesMud Creek
Location0.2 Mi. W of Jct. SR K30
RouteState Highway 9
CountyLyon County
StateIowa
Coordinates43.43306, -96.33857
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.9 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span61 ft (18.6 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,270 (2022)
Projected traffic3,270 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Ia 9 over Mud Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ia 9 over Mud 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 February 2023.

How much traffic does Ia 9 over Mud Creek carry?

About 3,270 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is Ia 9 over Mud Creek?

The structure is 184 ft (56.1 m) long with a longest span of 61 ft (18.6 m) and a deck 48 ft wide.

Who owns Ia 9 over Mud Creek?

It is owned by the State Highway Agency.