US Bridges

Kenyon RD NB over Cn RR and 7th ST

Fair

Webster County, Iowa · 1.5 Mi. N of S JCT US 169 · Structure no. 000000000052103

Built
1977
48 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
742 ft
11 main spans
Daily traffic
3,109
2021 count
Owner
State
State Highway Agency

About this bridge

Kenyon RD NB over Cn RR and 7th ST is a prestressed concrete stringer/multi-beam or girder carrying Kenyon RD NB over Cn RR and 7th ST in Webster 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 3,109 vehicles a day, roughly 3% of them trucks, projected to reach 3,109 by 2043. The structure is 742 ft (226.2 m) long and 46 ft wide.

Location

Open in Google Maps
CarriesKenyon RD NB
CrossesCn RR and 7th ST
Location1.5 Mi. N of S JCT US 169
RouteCity Street 0
CountyWebster County
StateIowa
Coordinates42.49716, -94.18733
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.1 US tons
Inventory rating30.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length742 ft (226.2 m)
Longest span80 ft (24.4 m)
Deck width46 ft (14.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,109 (2021)
Projected traffic3,109 by 2043
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Kenyon RD NB over Cn RR and 7th ST built?

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

What condition is Kenyon RD NB over Cn RR and 7th ST 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 June 2023.

How much traffic does Kenyon RD NB over Cn RR and 7th ST carry?

About 3,109 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Kenyon RD NB over Cn RR and 7th ST?

The structure is 742 ft (226.2 m) long with a longest span of 80 ft (24.4 m) and a deck 46 ft wide.

Who owns Kenyon RD NB over Cn RR and 7th ST?

It is owned by the State Highway Agency.