US Bridges

Martin Cr.Rd. over Martins CR

Poor

Linn County, Iowa · 083061105 · Structure no. 000000000220721

Built
1972
53 years old
Condition
Poor
inspected September 2024
Type
Channel Beam
Concrete
Length
31 ft
1 main span
Daily traffic
120
2021 count
Owner
County
County Highway Agency

About this bridge

Martin Cr.Rd. over Martins CR is a concrete channel beam carrying Martin Cr.Rd. over Martins CR in Linn County, Iowa. It was built in 1972, so it is 53 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 120 vehicles a day, projected to reach 120 by 2044. The structure is 31 ft (9.4 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesMartin Cr.Rd.
CrossesMartins CR
Location083061105
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.00842, -91.51706
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.1 US tons
Inventory rating23.9 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic120 (2021)
Projected traffic120 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Martin Cr.Rd. over Martins CR built?

It was built in 1972, making it 53 years old in 2025.

What condition is Martin Cr.Rd. over Martins CR 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 September 2024.

How much traffic does Martin Cr.Rd. over Martins CR carry?

About 120 vehicles per day (2021 count).

How long is Martin Cr.Rd. over Martins CR?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns Martin Cr.Rd. over Martins CR?

It is owned by the County Highway Agency.