US Bridges

Iowa RD over W Otter CR Trib. to

Fair

Linn County, Iowa · 085070703 · Structure no. 000000000222285

Built
1977
48 years old
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
23 ft
1 main span
Daily traffic
20
2022 count
Owner
County
County Highway Agency

About this bridge

Iowa RD over W Otter CR Trib. to is a wood or timber slab carrying Iowa RD over W Otter CR Trib. to in Linn County, Iowa. It was built in 1977, so it is 48 years old, older 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 20 vehicles a day, projected to reach 20 by 2044. The structure is 23 ft (7 m) long and 30 ft wide.

Location

Open in Google Maps
CarriesIowa RD
CrossesW Otter CR Trib. to
Location085070703
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.19024, -91.71105
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.3 US tons
Inventory rating63.8 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2022)
Projected traffic20 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-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 Iowa RD over W Otter CR Trib. to built?

It was built in 1977, making it 48 years old in 2025.

What condition is Iowa RD over W Otter CR Trib. to 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 September 2024.

How much traffic does Iowa RD over W Otter CR Trib. to carry?

About 20 vehicles per day (2022 count).

How long is Iowa RD over W Otter CR Trib. to?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 30 ft wide.

Who owns Iowa RD over W Otter CR Trib. to?

It is owned by the County Highway Agency.