US Bridges

Manor RD over Drainage

PoorClosed to traffic

Louisa County, Iowa · 073042501 · Structure no. 000000000008380

Built
1920
105 years old
Condition
Poor
inspected August 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
144
2022 count
Owner
County
County Highway Agency

About this bridge

Manor RD over Drainage is a steel stringer/multi-beam or girder carrying Manor RD over Drainage in Louisa County, Iowa. It was built in 1920, so it is 105 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 0 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. Its operating status is: closed to all traffic.

It carries about 144 vehicles a day, projected to reach 144 by 2043. The structure is 32 ft (9.8 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesManor RD
CrossesDrainage
Location073042501
RouteCity Street 0
CountyLouisa County
StateIowa
Coordinates41.09231, -91.25843
Functional classRural Local

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
Deck0 FailedOut of service and beyond corrective action.
Superstructure0 FailedOut of service and beyond corrective action.
Substructure0 FailedOut of service and beyond corrective action.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2021
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic144 (2022)
Projected traffic144 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Manor RD over Drainage built?

It was built in 1920, making it 105 years old in 2025.

What condition is Manor RD over Drainage 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 August 2021.

How much traffic does Manor RD over Drainage carry?

About 144 vehicles per day (2022 count).

How long is Manor RD over Drainage?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Manor RD over Drainage?

It is owned by the County Highway Agency.