US Bridges

Grantsmill Road over Lake Purdy

Good

Jefferson County, Alabama · Grantsmill Road * AL119 · Structure no. 020690

Built
2011
14 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
171 ft
1 main span
Daily traffic
4,000
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grantsmill Road over Lake Purdy is a steel stringer/multi-beam or girder carrying Grantsmill Road over Lake Purdy in Jefferson County, Alabama. It was built in 2011, so it is 14 years old, younger than the Alabama average of 51.1 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 4,000 vehicles a day, roughly 1% of them trucks, projected to reach 9,000 by 2036. The structure is 171 ft (52.1 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesGrantsmill Road
CrossesLake Purdy
LocationGrantsmill Road * AL119
RouteCity Street 0
CountyJefferson County
StateAlabama
Coordinates33.48087, -86.62898
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating93.6 US tons
Inventory rating56.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span51 ft (15.5 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2016)
Projected traffic9,000 by 2036
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Grantsmill Road over Lake Purdy built?

It was built in 2011, making it 14 years old in 2025.

What condition is Grantsmill Road over Lake Purdy 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 October 2024.

How much traffic does Grantsmill Road over Lake Purdy carry?

About 4,000 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Grantsmill Road over Lake Purdy?

The structure is 171 ft (52.1 m) long with a longest span of 51 ft (15.5 m) and a deck 27 ft wide.

Who owns Grantsmill Road over Lake Purdy?

It is owned by the City or Municipal Highway Agency.