US Bridges

SP 345 over Martinez Creek

Fair

Bexar County, Texas · 0.25 MI NW of IH 10 · Structure no. 150150007209184

Built
1967
58 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
142 ft
4 main spans
Daily traffic
31,404
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

SP 345 over Martinez Creek is a concrete continuous slab carrying SP 345 over Martinez Creek in Bexar County, Texas. It was built in 1967, so it is 58 years old, older than the Texas average of 44.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 31,404 vehicles a day, roughly 12% of them trucks, projected to reach 27,720 by 2033. The structure is 142 ft (43.3 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSP 345
CrossesMartinez Creek
Location0.25 MI NW of IH 10
RouteState Highway 345
CountyBexar County
StateTexas
Coordinates29.45639, -98.51809
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span38 ft (11.6 m)
Deck width56 ft (17.1 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,404 (2019)
Projected traffic27,720 by 2033
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$15,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SP 345 over Martinez Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is SP 345 over Martinez Creek 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 July 2023.

How much traffic does SP 345 over Martinez Creek carry?

About 31,404 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is SP 345 over Martinez Creek?

The structure is 142 ft (43.3 m) long with a longest span of 38 ft (11.6 m) and a deck 56 ft wide.

Who owns SP 345 over Martinez Creek?

It is owned by the City or Municipal Highway Agency.