US Bridges

W Marion ST over Unnamed Stream

Good

Delaware County, Iowa · 089053105 · Structure no. 000000000505275

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
2,887
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

W Marion ST over Unnamed Stream is a concrete continuous culvert carrying W Marion ST over Unnamed Stream in Delaware County, Iowa. It was built in 2011, so it is 14 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,887 vehicles a day, projected to reach 2,887 by 2043. The structure is 39 ft (11.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesW Marion ST
CrossesUnnamed Stream
Location089053105
RouteCity Street 0
StateIowa
Coordinates42.48166, -91.47323
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,887 (2022)
Projected traffic2,887 by 2043
Trucks0%
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

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 W Marion ST over Unnamed Stream built?

It was built in 2011, making it 14 years old in 2025.

What condition is W Marion ST over Unnamed Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does W Marion ST over Unnamed Stream carry?

About 2,887 vehicles per day (2022 count).

How long is W Marion ST over Unnamed Stream?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m).

Who owns W Marion ST over Unnamed Stream?

It is owned by the City or Municipal Highway Agency.