US Bridges

RM 1320 over North Grape Creek

Good

Blanco County, Texas · 3.8 MI NE of FM 2721 · Structure no. 140160095404004

Built
1970
55 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
102 ft
12 main spans
Daily traffic
182
2020 count
Owner
State
State Highway Agency

About this bridge

RM 1320 over North Grape Creek is a concrete culvert carrying RM 1320 over North Grape Creek in Blanco County, Texas. It was built in 1970, so it is 55 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 182 vehicles a day, roughly 6% of them trucks, projected to reach 190 by 2033. The structure is 102 ft (31.1 m) long and 27 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesRM 1320
CrossesNorth Grape Creek
Location3.8 MI NE of FM 2721
RouteState Highway 1320
CountyBlanco County
StateTexas
Coordinates30.33913, -98.49152
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans12
Design loadUnknown
Structure length102 ft (31.1 m)
Longest span8 ft (2.4 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic182 (2020)
Projected traffic190 by 2033
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 1320 over North Grape Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is RM 1320 over North Grape 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 1320 over North Grape Creek carry?

About 182 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is RM 1320 over North Grape Creek?

The structure is 102 ft (31.1 m) long with a longest span of 8 ft (2.4 m) and a deck 27 ft wide.

Who owns RM 1320 over North Grape Creek?

It is owned by the State Highway Agency.