US Bridges

18th ST over Elm Slough

Good

Medina County, Texas · 0.8 MI W of SH 173 · Structure no. 151630D00155001

Built
1995
30 years old, rebuilt 2002
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
112 ft
13 main spans
Daily traffic
1,871
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

18th ST over Elm Slough is a concrete culvert carrying 18th ST over Elm Slough in Medina County, Texas. It was built in 1995 and reconstructed in 2002, so it is 30 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 1,871 vehicles a day, projected to reach 3,400 by 2035. The structure is 112 ft (34.1 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries18th ST
CrossesElm Slough
Location0.8 MI W of SH 173
RouteCity Street 0
CountyMedina County
StateTexas
Coordinates29.34866, -99.13132
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans13
Design loadHS 20
Structure length112 ft (34.1 m)
Longest span8 ft (2.4 m)
Deck width31 ft (9.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,871 (2020)
Projected traffic3,400 by 2035
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$262,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 18th ST over Elm Slough built?

It was built in 1995, making it 30 years old in 2025. It was reconstructed in 2002.

What condition is 18th ST over Elm Slough 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 June 2023.

How much traffic does 18th ST over Elm Slough carry?

About 1,871 vehicles per day (2020 count).

How long is 18th ST over Elm Slough?

The structure is 112 ft (34.1 m) long with a longest span of 8 ft (2.4 m) and a deck 31 ft wide.

Who owns 18th ST over Elm Slough?

It is owned by the City or Municipal Highway Agency.