US Bridges

Miller Road over Tower Creek

Fair

Linn County, Iowa · 000000000 · Structure no. 000000000363895

Built
1996
29 years old
Condition
Fair
inspected April 2023
Type
Slab
Wood or Timber
Length
25 ft
1 main span
Daily traffic
2,740
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Miller Road over Tower Creek is a wood or timber slab carrying Miller Road over Tower Creek in Linn County, Iowa. It was built in 1996, so it is 29 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,740 vehicles a day, projected to reach 2,740 by 2043. The structure is 25 ft (7.6 m) long and 25 ft wide.

Location

Open in Google Maps
CarriesMiller Road
CrossesTower Creek
Location000000000
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates42.05526, -91.70695
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51.4 US tons
Inventory rating41.4 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span23 ft (7 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,740 (2021)
Projected traffic2,740 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Miller Road over Tower Creek built?

It was built in 1996, making it 29 years old in 2025.

What condition is Miller Road over Tower Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Miller Road over Tower Creek carry?

About 2,740 vehicles per day (2021 count).

How long is Miller Road over Tower Creek?

The structure is 25 ft (7.6 m) long with a longest span of 23 ft (7 m) and a deck 25 ft wide.

Who owns Miller Road over Tower Creek?

It is owned by the City or Municipal Highway Agency.