US Bridges

Lp 20 SB over San Idelfonso Creek

Good

Webb County, Texas · 5.10 MI South of SH 359 · Structure no. 222400008616186

Built
2011
14 years old
Condition
Good
inspected December 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
896 ft
8 main spans
Daily traffic
3,500
2010 count
Owner
State
State Highway Agency

About this bridge

Lp 20 SB over San Idelfonso Creek is a prestressed concrete stringer/multi-beam or girder carrying Lp 20 SB over San Idelfonso Creek in Webb County, Texas. It was built in 2011, so it is 14 years old, younger than the Texas average of 44.4 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 3,500 vehicles a day, projected to reach 12,000 by 2030. The structure is 896 ft (273.1 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLp 20 SB
CrossesSan Idelfonso Creek
Location5.10 MI South of SH 359
RouteState Highway 20
CountyWebb County
StateTexas
Coordinates27.42518, -99.45037
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHL 93
Structure length896 ft (273.1 m)
Longest span112 ft (34.1 m)
Deck width52 ft (16 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2010)
Projected traffic12,000 by 2030
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway 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 Lp 20 SB over San Idelfonso Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is Lp 20 SB over San Idelfonso 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 December 2022.

How much traffic does Lp 20 SB over San Idelfonso Creek carry?

About 3,500 vehicles per day (2010 count).

How long is Lp 20 SB over San Idelfonso Creek?

The structure is 896 ft (273.1 m) long with a longest span of 112 ft (34.1 m) and a deck 52 ft wide.

Who owns Lp 20 SB over San Idelfonso Creek?

It is owned by the State Highway Agency.