US Bridges

Jacob ST over Drainage

PoorClosed to traffic

Tama County, Iowa · 083162102 · Structure no. 000000000008350

Built
1900
125 years old, rebuilt 1984
Condition
Poor
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
232
2022 count
Owner
County
County Highway Agency

About this bridge

Jacob ST over Drainage is a steel stringer/multi-beam or girder carrying Jacob ST over Drainage in Tama County, Iowa. It was built in 1900 and reconstructed in 1984, so it is 125 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 232 vehicles a day, projected to reach 232 by 2044. The structure is 31 ft (9.4 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesJacob ST
CrossesDrainage
Location083162102
RouteCity Street 0
CountyTama County
StateIowa
Coordinates41.98205, -92.71609
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation0: Immediate repair necessary to put back in service
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic232 (2022)
Projected traffic232 by 2044
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Jacob ST over Drainage built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1984.

What condition is Jacob ST 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 October 2024.

How much traffic does Jacob ST over Drainage carry?

About 232 vehicles per day (2022 count).

How long is Jacob ST over Drainage?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 18 ft wide.

Who owns Jacob ST over Drainage?

It is owned by the County Highway Agency.