US Bridges

RM 783 over Threadgill Creek

Fair

Gillespie County, Texas · 1.20 MI N of FM 648 · Structure no. 140870105602001

Built
1955
70 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
175 ft
7 main spans
Daily traffic
235
2020 count
Owner
State
State Highway Agency

About this bridge

RM 783 over Threadgill Creek is a concrete slab carrying RM 783 over Threadgill Creek in Gillespie County, Texas. It was built in 1955, so it is 70 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 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 235 vehicles a day, roughly 16% of them trucks, projected to reach 240 by 2033. The structure is 175 ft (53.3 m) long and 25 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesRM 783
CrossesThreadgill Creek
Location1.20 MI N of FM 648
RouteState Highway 783
CountyGillespie County
StateTexas
Coordinates30.46248, -99.13045
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length175 ft (53.3 m)
Longest span25 ft (7.6 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic235 (2020)
Projected traffic240 by 2033
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was RM 783 over Threadgill Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is RM 783 over Threadgill 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 June 2023.

How much traffic does RM 783 over Threadgill Creek carry?

About 235 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is RM 783 over Threadgill Creek?

The structure is 175 ft (53.3 m) long with a longest span of 25 ft (7.6 m) and a deck 25 ft wide.

Who owns RM 783 over Threadgill Creek?

It is owned by the State Highway Agency.