US Bridges

Delta Road over West Fork Horse Creek

PoorPosted for load

Lane County, Oregon · 1.0 MI SE of Mckenzie Br · Structure no. 39B164000000010

Built
1950
75 years old, rebuilt 2004
Condition
Poor
inspected July 2024
Type
Truss - Thru
Wood or Timber
Length
103 ft
1 main span
Daily traffic
191
2020 count
Owner
County
County Highway Agency

About this bridge

Delta Road over West Fork Horse Creek is a wood or timber truss - thru carrying Delta Road over West Fork Horse Creek in Lane County, Oregon. It was built in 1950 and reconstructed in 2004, so it is 75 years old, older 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. Its operating status is: posted for load restriction.

It carries about 191 vehicles a day, roughly 1% of them trucks, projected to reach 216 by 2025. The structure is 103 ft (31.4 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesDelta Road
CrossesWest Fork Horse Creek
Location1.0 MI SE of Mckenzie Br
RouteFederal Lands Road C0000
StateOregon
Coordinates44.17091, -122.20621
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.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating20 US tons
Inventory rating15.3 US tons

Structure

Structure typeTruss - Thru
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length103 ft (31.4 m)
Longest span100 ft (30.5 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic191 (2020)
Projected traffic216 by 2025
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Delta Road over West Fork Horse Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2004.

What condition is Delta Road over West Fork Horse Creek 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 July 2024.

How much traffic does Delta Road over West Fork Horse Creek carry?

About 191 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Delta Road over West Fork Horse Creek?

The structure is 103 ft (31.4 m) long with a longest span of 100 ft (30.5 m) and a deck 16 ft wide.

Who owns Delta Road over West Fork Horse Creek?

It is owned by the County Highway Agency.