US Bridges

Mt. Pisgah RD over Silver Creek Relief

Fair

Washington Parish, Louisiana · 1.6M South of HWY 38 · Structure no. 625930543901351

Built
1989
36 years old
Condition
Fair
inspected November 2023
Type
Culvert
Steel
Length
30 ft
4 main spans
Daily traffic
675
2020 count
Owner
County
County Highway Agency

About this bridge

Mt. Pisgah RD over Silver Creek Relief is a steel culvert carrying Mt. Pisgah RD over Silver Creek Relief in Washington Parish, Louisiana. It was built in 1989, so it is 36 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 675 vehicles a day, projected to reach 742 by 2040. The structure is 30 ft (9.1 m) long and 30 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMt. Pisgah RD
CrossesSilver Creek Relief
Location1.6M South of HWY 38
RouteCounty Highway 0
CountyWashington Parish
StateLouisiana
Coordinates30.90324, -90.22473
Functional classRural 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.8 US tons
Inventory rating66.8 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span6 ft (1.8 m)
Deck width30 ft (9.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic675 (2020)
Projected traffic742 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$138,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt. Pisgah RD over Silver Creek Relief built?

It was built in 1989, making it 36 years old in 2025.

What condition is Mt. Pisgah RD over Silver Creek Relief 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 November 2023.

How much traffic does Mt. Pisgah RD over Silver Creek Relief carry?

About 675 vehicles per day (2020 count).

How long is Mt. Pisgah RD over Silver Creek Relief?

The structure is 30 ft (9.1 m) long with a longest span of 6 ft (1.8 m) and a deck 30 ft wide.

Who owns Mt. Pisgah RD over Silver Creek Relief?

It is owned by the County Highway Agency.