US Bridges

RM 620 over Colorado River

Fair

Travis County, Texas · 4.1 MI W of FM 2222 · Structure no. 142270068302019

Built
1995
30 years old
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
3,220 ft
23 main spans
Daily traffic
25,454
2023 count
Owner
State
State Highway Agency

About this bridge

RM 620 over Colorado River is a prestressed concrete stringer/multi-beam or girder carrying RM 620 over Colorado River in Travis County, Texas. It was built in 1995, 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 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 25,454 vehicles a day, roughly 4% of them trucks, projected to reach 42,118 by 2041. The structure is 3,220 ft (981.5 m) long and 80 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesRM 620
CrossesColorado River
Location4.1 MI W of FM 2222
RouteState Highway 620
StateTexas
Coordinates30.39083, -97.90946
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckCorrugated steel
Main spans23
Design loadHS 20
Structure length3,220 ft (981.5 m)
Longest span140 ft (42.7 m)
Deck width80 ft (24.4 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,454 (2023)
Projected traffic42,118 by 2041
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was RM 620 over Colorado River built?

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

What condition is RM 620 over Colorado 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 January 2023.

How much traffic does RM 620 over Colorado River carry?

About 25,454 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is RM 620 over Colorado River?

The structure is 3,220 ft (981.5 m) long with a longest span of 140 ft (42.7 m) and a deck 80 ft wide.

Who owns RM 620 over Colorado River?

It is owned by the State Highway Agency.