US Bridges

Mormon Trk Blvd over Willow Creek

Fair

Johnson County, Iowa · 079061700 · Structure no. 000000000501190

Built
1971
54 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
12,954
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mormon Trk Blvd over Willow Creek is a concrete continuous culvert carrying Mormon Trk Blvd over Willow Creek in Johnson County, Iowa. It was built in 1971, so it is 54 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 12,954 vehicles a day, projected to reach 12,954 by 2043. The structure is 21 ft (6.4 m) long.

Location

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CarriesMormon Trk Blvd
CrossesWillow Creek
Location079061700
RouteCity Street 0
CountyJohnson County
StateIowa
Coordinates41.65055, -91.57406
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.1 US tons
Inventory rating34.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,954 (2022)
Projected traffic12,954 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mormon Trk Blvd over Willow Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Mormon Trk Blvd over Willow 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 July 2023.

How much traffic does Mormon Trk Blvd over Willow Creek carry?

About 12,954 vehicles per day (2022 count).

How long is Mormon Trk Blvd over Willow Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Mormon Trk Blvd over Willow Creek?

It is owned by the City or Municipal Highway Agency.