US Bridges

Conf. Center Rd. over Howard Creek

Good

Marion County, Oregon · Silver Falls State Park · Structure no. 22749 000 00000

Built
2018
7 years old
Condition
Good
inspected November 2023
Type
Slab
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
50
2010 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Conf. Center Rd. over Howard Creek is a prestressed concrete slab carrying Conf. Center Rd. over Howard Creek in Marion County, Oregon. It was built in 2018, so it is 7 years old, younger than the Oregon average of 49.9 years.

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

It carries about 50 vehicles a day, roughly 1% of them trucks, projected to reach 80 by 2030. The structure is 37 ft (11.3 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesConf. Center Rd.
CrossesHoward Creek
LocationSilver Falls State Park
CountyMarion County
StateOregon
Coordinates44.86417, -122.64528
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating52.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length37 ft (11.3 m)
Longest span37 ft (11.3 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2010)
Projected traffic80 by 2030
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Conf. Center Rd. over Howard Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is Conf. Center Rd. over Howard Creek 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 November 2023.

How much traffic does Conf. Center Rd. over Howard Creek carry?

About 50 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is Conf. Center Rd. over Howard Creek?

The structure is 37 ft (11.3 m) long with a longest span of 37 ft (11.3 m) and a deck 30 ft wide.

Who owns Conf. Center Rd. over Howard Creek?

It is owned by the State Park, Forest, or Reservation Agency.