US Bridges

Tollman Ave over Drainage Ditch

Good

Hamilton County, Iowa · 088242402 · Structure no. 000000000171791

Built
2012
13 years old
Condition
Good
inspected September 2023
Type
Slab
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

Tollman Ave over Drainage Ditch is a prestressed concrete slab carrying Tollman Ave over Drainage Ditch in Hamilton County, Iowa. It was built in 2012, so it is 13 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 45 vehicles a day, projected to reach 45 by 2043. The structure is 34 ft (10.4 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTollman Ave
CrossesDrainage Ditch
Location088242402
RouteCounty Highway 0
CountyHamilton County
StateIowa
Coordinates42.41978, -93.60114
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Tollman Ave over Drainage Ditch built?

It was built in 2012, making it 13 years old in 2025.

What condition is Tollman Ave over Drainage Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Tollman Ave over Drainage Ditch carry?

About 45 vehicles per day (2022 count).

How long is Tollman Ave over Drainage Ditch?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 31 ft wide.

Who owns Tollman Ave over Drainage Ditch?

It is owned by the County Highway Agency.