US Bridges

Local over Branch North Timber Crk

Poor

Marshall County, Iowa · 083202401 · Structure no. 000000000242990

Built
1924
101 years old
Condition
Poor
inspected November 2023
Type
Slab
Concrete
Length
21 ft
1 main span
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Branch North Timber Crk is a concrete slab carrying Local over Branch North Timber Crk in Marshall County, Iowa. It was built in 1924, so it is 101 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 4 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.

It carries about 41 vehicles a day, projected to reach 41 by 2043. The structure is 21 ft (6.4 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLocal
CrossesBranch North Timber Crk
Location083202401
RouteCounty Highway 0
CountyMarshall County
StateIowa
Coordinates41.9931, -93.13059
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating55.3 US tons
Inventory rating33.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span20 ft (6.1 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$405,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Branch North Timber Crk built?

It was built in 1924, making it 101 years old in 2025.

What condition is Local over Branch North Timber Crk 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 November 2023.

How much traffic does Local over Branch North Timber Crk carry?

About 41 vehicles per day (2022 count).

How long is Local over Branch North Timber Crk?

The structure is 21 ft (6.4 m) long with a longest span of 20 ft (6.1 m) and a deck 20 ft wide.

Who owns Local over Branch North Timber Crk?

It is owned by the County Highway Agency.