US Bridges

US 169 over Bass Creek

Poor

Webster County, Iowa · 0.6 Mi. S of Jct. SR C56 · Structure no. 000000000052250

Built
1958
67 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
112 ft
3 main spans
Daily traffic
4,680
2021 count
Owner
State
State Highway Agency

About this bridge

US 169 over Bass Creek is a prestressed concrete stringer/multi-beam or girder carrying US 169 over Bass Creek in Webster County, Iowa. It was built in 1958, so it is 67 years old, older 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 4,680 vehicles a day, roughly 20% of them trucks, projected to reach 4,680 by 2043. The structure is 112 ft (34.1 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS 169
CrossesBass Creek
Location0.6 Mi. S of Jct. SR C56
RouteU.S. Route 169
StateIowa
Coordinates42.6066, -94.22775
Functional classRural Principal Arterial - Other

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.2 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span40 ft (12.2 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,680 (2021)
Projected traffic4,680 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Bass Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is US 169 over Bass Creek 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 May 2023.

How much traffic does US 169 over Bass Creek carry?

About 4,680 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is US 169 over Bass Creek?

The structure is 112 ft (34.1 m) long with a longest span of 40 ft (12.2 m) and a deck 36 ft wide.

Who owns US 169 over Bass Creek?

It is owned by the State Highway Agency.