US Bridges

RM 1623 over Pedernales River

Fair

Gillespie County, Texas · 0.5 MI N of US 290 · Structure no. 140870153403006

Built
1972
53 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
380 ft
14 main spans
Daily traffic
434
2020 count
Owner
State
State Highway Agency

About this bridge

RM 1623 over Pedernales River is a concrete continuous slab carrying RM 1623 over Pedernales River 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 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 434 vehicles a day, roughly 14% of them trucks, projected to reach 560 by 2033. The structure is 380 ft (115.8 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRM 1623
CrossesPedernales River
Location0.5 MI N of US 290
RouteState Highway 1623
CountyGillespie County
StateTexas
Coordinates30.24314, -98.65722
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans14
Design loadH 15
Structure length380 ft (115.8 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 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 closed3.1 mi (5 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 Pedernales River built?

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

What condition is RM 1623 over Pedernales River 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 April 2023.

How much traffic does RM 1623 over Pedernales River carry?

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

How long is RM 1623 over Pedernales River?

The structure is 380 ft (115.8 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns RM 1623 over Pedernales River?

It is owned by the State Highway Agency.