US Bridges

New Miami River RD over Miami Rv

Poor

Tillamook County, Oregon · 4.0 MI South of Mohler · Structure no. 57C59 563 00005

Built
1978
47 years old
Condition
Poor
inspected June 2024
Type
Slab
Prestressed Concrete
Length
91 ft
2 main spans
Daily traffic
106
2020 count
Owner
County
County Highway Agency

About this bridge

New Miami River RD over Miami Rv is a prestressed concrete slab carrying New Miami River RD over Miami Rv in Tillamook County, Oregon. It was built in 1978, so it is 47 years old, younger than the Oregon average of 49.9 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 106 vehicles a day, projected to reach 126 by 2025. The structure is 91 ft (27.7 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesNew Miami River RD
CrossesMiami Rv
Location4.0 MI South of Mohler
RouteCounty Highway 577
CountyTillamook County
StateOregon
Coordinates45.61056, -123.86725
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 protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating43.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 25 or greater
Structure length91 ft (27.7 m)
Longest span42 ft (12.8 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic106 (2020)
Projected traffic126 by 2025
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$607,000
NavigationNo navigation control on waterway

Frequently asked questions

When was New Miami River RD over Miami Rv built?

It was built in 1978, making it 47 years old in 2025.

What condition is New Miami River RD over Miami Rv 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 June 2024.

How much traffic does New Miami River RD over Miami Rv carry?

About 106 vehicles per day (2020 count).

How long is New Miami River RD over Miami Rv?

The structure is 91 ft (27.7 m) long with a longest span of 42 ft (12.8 m) and a deck 32 ft wide.

Who owns New Miami River RD over Miami Rv?

It is owned by the County Highway Agency.