US Bridges

Old U.S. 91 over Drainage Channel

Fair

Clark County, Nevada · 0.5 MI S of SR 161 (jean) · Structure no. B2170

Built
1996
29 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
40 ft
3 main spans
Daily traffic
58
2017 count
Owner
County
County Highway Agency

About this bridge

Old U.S. 91 over Drainage Channel is a concrete culvert carrying Old U.S. 91 over Drainage Channel in Clark County, Nevada. It was built in 1996, so it is 29 years old, younger than the Nevada average of 36.4 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 58 vehicles a day, roughly 30% of them trucks, projected to reach 120 by 2040. The structure is 40 ft (12.3 m) long. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesOld U.S. 91
CrossesDrainage Channel
Location0.5 MI S of SR 161 (jean)
RouteCounty Highway 91
CountyClark County
StateNevada
Coordinates35.76702, -115.33373
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.3 US tons
Inventory rating44.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length40 ft (12.3 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58 (2017)
Projected traffic120 by 2040
Trucks30%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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$252,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old U.S. 91 over Drainage Channel built?

It was built in 1996, making it 29 years old in 2025.

What condition is Old U.S. 91 over Drainage Channel 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 October 2024.

How much traffic does Old U.S. 91 over Drainage Channel carry?

About 58 vehicles per day (2017 count), of which roughly 30% are trucks.

How long is Old U.S. 91 over Drainage Channel?

The structure is 40 ft (12.3 m) long with a longest span of 12 ft (3.6 m).

Who owns Old U.S. 91 over Drainage Channel?

It is owned by the County Highway Agency.