US Bridges

E18 Marble RD over Stream

Good

Marshall County, Iowa · 085180905 · Structure no. 000000000035571

Built
2015
10 years old
Condition
Good
inspected November 2021
Type
Culvert
Concrete Continuous
Length
42 ft
3 main spans
Daily traffic
530
2022 count
Owner
County
County Highway Agency

About this bridge

E18 Marble RD over Stream is a concrete continuous culvert carrying E18 Marble RD over Stream in Marshall County, Iowa. It was built in 2015, so it is 10 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 530 vehicles a day, roughly 11% of them trucks, projected to reach 530 by 2041. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 19.3 mi (31 km).

CarriesE18 Marble RD
CrossesStream
Location085180905
RouteCounty Highway 0
StateIowa
Coordinates42.18802, -92.95258
Functional classRural Major Collector

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 inspectionNovember 2021
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 alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHL 93
Structure length42 ft (12.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic530 (2022)
Projected traffic530 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was E18 Marble RD over Stream built?

It was built in 2015, making it 10 years old in 2025.

What condition is E18 Marble RD over 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 November 2021.

How much traffic does E18 Marble RD over Stream carry?

About 530 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is E18 Marble RD over Stream?

The structure is 42 ft (12.8 m) long with a longest span of 14 ft (4.3 m).

Who owns E18 Marble RD over Stream?

It is owned by the County Highway Agency.