US Bridges

Missouri Avenue over Walnut Creek

PoorPosted for load

Pottawattamie County, Iowa · 076381501 · Structure no. 000000000287271

Built
1953
72 years old, rebuilt 1990
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
62 ft
3 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Missouri Avenue over Walnut Creek is a wood or timber stringer/multi-beam or girder carrying Missouri Avenue over Walnut Creek in Pottawattamie County, Iowa. It was built in 1953 and reconstructed in 1990, so it is 72 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 62 ft (18.9 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMissouri Avenue
CrossesWalnut Creek
Location076381501
RouteCounty Highway 0
StateIowa
Coordinates41.3899, -95.19732
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.2 US tons
Inventory rating19.4 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span23 ft (7 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2043
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Missouri Avenue over Walnut Creek built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1990.

What condition is Missouri Avenue over Walnut Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Missouri Avenue over Walnut Creek carry?

About 26 vehicles per day (2022 count).

How long is Missouri Avenue over Walnut Creek?

The structure is 62 ft (18.9 m) long with a longest span of 23 ft (7 m) and a deck 19 ft wide.

Who owns Missouri Avenue over Walnut Creek?

It is owned by the County Highway Agency.