US Bridges

RM 1623 over Roundhead Creek

Good

Gillespie County, Texas · 1.4 MI S of FM 2721 · Structure no. 140870153403007

Built
1972
53 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
44 ft
3 main spans
Daily traffic
434
2020 count
Owner
State
State Highway Agency

About this bridge

RM 1623 over Roundhead Creek is a concrete culvert carrying RM 1623 over Roundhead Creek in Gillespie County, Texas. It was built in 1972, so it is 53 years old, older 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 434 vehicles a day, roughly 14% of them trucks, projected to reach 560 by 2033. The structure is 44 ft (13.4 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesRM 1623
CrossesRoundhead Creek
Location1.4 MI S of FM 2721
RouteState Highway 1623
StateTexas
Coordinates30.26352, -98.65697
Functional classRural Major Collector

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to 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 spans3
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span10 ft (3 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic434 (2020)
Projected traffic560 by 2033
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 1623 over Roundhead Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is RM 1623 over Roundhead 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 April 2023.

How much traffic does RM 1623 over Roundhead Creek carry?

About 434 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is RM 1623 over Roundhead Creek?

The structure is 44 ft (13.4 m) long with a longest span of 10 ft (3 m) and a deck 31 ft wide.

Who owns RM 1623 over Roundhead Creek?

It is owned by the State Highway Agency.