US Bridges

Mcmann Creek Road over San Poil River

PoorPosted for load

Ferry County, Washington · .17 E SR20 · Structure no. 087048000000000

Built
1953
72 years old, rebuilt 2004
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
50 ft
1 main span
Daily traffic
9
2018 count
Owner
County
County Highway Agency

About this bridge

Mcmann Creek Road over San Poil River is a wood or timber stringer/multi-beam or girder carrying Mcmann Creek Road over San Poil River in Ferry County, Washington. It was built in 1953 and reconstructed in 2004, so it is 72 years old, older than the Washington average of 49.8 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 9 vehicles a day, projected to reach 15 by 2040. The structure is 50 ft (15.2 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesMcmann Creek Road
CrossesSan Poil River
Location.17 E SR20
RouteCounty Highway 2160
Coordinates48.56349, -118.74212
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33 US tons
Inventory rating22 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span49 ft (14.9 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9 (2018)
Projected traffic15 by 2040
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcmann Creek Road over San Poil River built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 2004.

What condition is Mcmann Creek Road over San Poil River 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 Mcmann Creek Road over San Poil River carry?

About 9 vehicles per day (2018 count).

How long is Mcmann Creek Road over San Poil River?

The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 16 ft wide.

Who owns Mcmann Creek Road over San Poil River?

It is owned by the County Highway Agency.