US Bridges

Magnolia Road over Silver Creek

Fair

Pottawattamie County, Iowa · 076402101 · Structure no. 000000000288040

Built
1946
79 years old, rebuilt 1995
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
123 ft
1 main span
Daily traffic
5
2021 count
Owner
County
County Highway Agency

About this bridge

Magnolia Road over Silver Creek is a steel stringer/multi-beam or girder carrying Magnolia Road over Silver Creek in Pottawattamie County, Iowa. It was built in 1946 and reconstructed in 1995, so it is 79 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 5 vehicles a day, projected to reach 5 by 2043. The structure is 123 ft (37.5 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMagnolia Road
CrossesSilver Creek
Location076402101
RouteCounty Highway 0
CountyPottawattamie County
StateIowa
Coordinates41.37584, -95.4567
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.8 US tons
Inventory rating14.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadHS 20
Structure length123 ft (37.5 m)
Longest span57 ft (17.4 m)
Deck width18 ft (5.4 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2021)
Projected traffic5 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 Magnolia Road over Silver Creek built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1995.

What condition is Magnolia Road over Silver 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 June 2023.

How much traffic does Magnolia Road over Silver Creek carry?

About 5 vehicles per day (2021 count).

How long is Magnolia Road over Silver Creek?

The structure is 123 ft (37.5 m) long with a longest span of 57 ft (17.4 m) and a deck 18 ft wide.

Who owns Magnolia Road over Silver Creek?

It is owned by the County Highway Agency.