US Bridges

Winslow RD over Trib Indian Creek

Fair

Linn County, Iowa · 084061900 · Structure no. 000000000221381

Built
1999
26 years old
Condition
Fair
inspected April 2022
Type
Slab
Wood or Timber
Length
49 ft
2 main spans
Daily traffic
1,129
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Winslow RD over Trib Indian Creek is a wood or timber slab carrying Winslow RD over Trib Indian Creek in Linn County, Iowa. It was built in 1999, so it is 26 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 5 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 1,129 vehicles a day, roughly 6% of them trucks, projected to reach 1,129 by 2043. The structure is 49 ft (14.9 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesWinslow RD
CrossesTrib Indian Creek
Location084061900
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates42.07173, -91.59058
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.4 US tons
Inventory rating41.7 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,129 (2022)
Projected traffic1,129 by 2043
Trucks6%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Winslow RD over Trib Indian Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is Winslow RD over Trib Indian 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 April 2022.

How much traffic does Winslow RD over Trib Indian Creek carry?

About 1,129 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Winslow RD over Trib Indian Creek?

The structure is 49 ft (14.9 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns Winslow RD over Trib Indian Creek?

It is owned by the City or Municipal Highway Agency.