US Bridges

Covington RD over Morgan Creek

FairPosted for load

Linn County, Iowa · 083081524 · Structure no. 000000000033760

Built
1955
70 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
122 ft
3 main spans
Daily traffic
7,300
2022 count
Owner
County
County Highway Agency

About this bridge

Covington RD over Morgan Creek is a steel continuous stringer/multi-beam or girder carrying Covington RD over Morgan Creek in Linn County, Iowa. It was built in 1955, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 7,300 vehicles a day, projected to reach 7,300 by 2044. The structure is 122 ft (37.2 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCovington RD
CrossesMorgan Creek
Location083081524
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates41.99522, -91.75579
Functional classUrban Minor Arterial

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.
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.8 US tons
Inventory rating29.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span47 ft (14.3 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,300 (2022)
Projected traffic7,300 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
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 Covington RD over Morgan Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Covington RD over Morgan 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 September 2024.

How much traffic does Covington RD over Morgan Creek carry?

About 7,300 vehicles per day (2022 count).

How long is Covington RD over Morgan Creek?

The structure is 122 ft (37.2 m) long with a longest span of 47 ft (14.3 m) and a deck 34 ft wide.

Who owns Covington RD over Morgan Creek?

It is owned by the County Highway Agency.