US Bridges

NW 13th ST over Rock Creek

Good

Polk County, Iowa · 080241601 · Structure no. 000000000505410

Built
2016
9 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
95
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

NW 13th ST over Rock Creek is a concrete continuous culvert carrying NW 13th ST over Rock Creek in Polk County, Iowa. It was built in 2016, so it is 9 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 95 vehicles a day, projected to reach 95 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNW 13th ST
CrossesRock Creek
Location080241601
RouteCity Street 0
CountyPolk County
StateIowa
Coordinates41.74205, -93.65007
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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.5 US tons
Inventory rating44.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length27 ft (8.2 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 traffic95 (2021)
Projected traffic95 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NW 13th ST over Rock Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is NW 13th ST over Rock 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 2023.

How much traffic does NW 13th ST over Rock Creek carry?

About 95 vehicles per day (2021 count).

How long is NW 13th ST over Rock Creek?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns NW 13th ST over Rock Creek?

It is owned by the City or Municipal Highway Agency.