US Bridges

US 169 over Trulner Creek

Fair

Humboldt County, Iowa · 0.3 Mi. S of SR C20 · Structure no. 000000000028941

Built
1995
30 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
3 main spans
Daily traffic
3,220
2022 count
Owner
State
State Highway Agency

About this bridge

US 169 over Trulner Creek is a prestressed concrete stringer/multi-beam or girder carrying US 169 over Trulner Creek in Humboldt County, Iowa. It was built in 1995, so it is 30 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,220 vehicles a day, roughly 24% of them trucks, projected to reach 3,220 by 2044. The structure is 154 ft (46.9 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS 169
CrossesTrulner Creek
Location0.3 Mi. S of SR C20
RouteU.S. Route 169
CountyHumboldt County
StateIowa
Coordinates42.85893, -94.22728
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.6 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span56 ft (17.1 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,220 (2022)
Projected traffic3,220 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 169 over Trulner Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is US 169 over Trulner Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does US 169 over Trulner Creek carry?

About 3,220 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 169 over Trulner Creek?

The structure is 154 ft (46.9 m) long with a longest span of 56 ft (17.1 m) and a deck 47 ft wide.

Who owns US 169 over Trulner Creek?

It is owned by the State Highway Agency.