US Bridges

NE 47th Street over Four Mile Creek

Good

Polk County, Iowa · 080240100 · Structure no. 000000000504915

Built
2006
19 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
189 ft
3 main spans
Daily traffic
89
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

NE 47th Street over Four Mile Creek is a prestressed concrete stringer/multi-beam or girder carrying NE 47th Street over Four Mile Creek in Polk County, Iowa. It was built in 2006, so it is 19 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 89 vehicles a day, projected to reach 89 by 2044. The structure is 189 ft (57.6 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNE 47th Street
CrossesFour Mile Creek
Location080240100
RouteCity Street 0
StateIowa
Coordinates41.7696, -93.59017
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.1 US tons
Inventory rating39.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length189 ft (57.6 m)
Longest span69 ft (21 m)
Deck width52 ft (15.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89 (2022)
Projected traffic89 by 2044
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

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 NE 47th Street over Four Mile Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is NE 47th Street over Four Mile Creek 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 2024.

How much traffic does NE 47th Street over Four Mile Creek carry?

About 89 vehicles per day (2022 count).

How long is NE 47th Street over Four Mile Creek?

The structure is 189 ft (57.6 m) long with a longest span of 69 ft (21 m) and a deck 52 ft wide.

Who owns NE 47th Street over Four Mile Creek?

It is owned by the City or Municipal Highway Agency.