US Bridges

510th Street over Stream

Poor

Pottawattamie County, Iowa · 077380304 · Structure no. 000000000363510

Built
1992
33 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
54 ft
3 main spans
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

510th Street over Stream is a wood or timber stringer/multi-beam or girder carrying 510th Street over Stream in Pottawattamie County, Iowa. It was built in 1992, so it is 33 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5 vehicles a day, projected to reach 5 by 2043. The structure is 54 ft (16.5 m) long and 17 ft wide.

Carries510th Street
CrossesStream
Location077380304
RouteCounty Highway 0
StateIowa
Coordinates41.49338, -95.21244
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating24.6 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span23 ft (7 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 510th Street over Stream built?

It was built in 1992, making it 33 years old in 2025.

What condition is 510th Street over Stream in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does 510th Street over Stream carry?

About 5 vehicles per day (2022 count).

How long is 510th Street over Stream?

The structure is 54 ft (16.5 m) long with a longest span of 23 ft (7 m) and a deck 17 ft wide.

Who owns 510th Street over Stream?

It is owned by the County Highway Agency.