US Bridges

Walker School RD over Saw Mill Branch

Good

New Castle County, Delaware · East of Blackbird · Structure no. 1456 045

Built
1998
27 years old
Condition
Good
inspected August 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
497
2021 count
Owner
State
State Highway Agency

About this bridge

Walker School RD over Saw Mill Branch is a prestressed concrete box beam or girders - multiple carrying Walker School RD over Saw Mill Branch in New Castle County, Delaware. It was built in 1998, so it is 27 years old, younger than the Delaware average of 47.3 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 497 vehicles a day, roughly 13% of them trucks, projected to reach 545 by 2042. The structure is 59 ft (17.9 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWalker School RD
CrossesSaw Mill Branch
LocationEast of Blackbird
RouteCounty Highway 45
Coordinates39.37367, -75.60114
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.6 US tons
Inventory rating58.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length59 ft (17.9 m)
Longest span56 ft (17 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic497 (2021)
Projected traffic545 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Walker School RD over Saw Mill Branch built?

It was built in 1998, making it 27 years old in 2025.

What condition is Walker School RD over Saw Mill Branch 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 August 2022.

How much traffic does Walker School RD over Saw Mill Branch carry?

About 497 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Walker School RD over Saw Mill Branch?

The structure is 59 ft (17.9 m) long with a longest span of 56 ft (17 m) and a deck 33 ft wide.

Who owns Walker School RD over Saw Mill Branch?

It is owned by the State Highway Agency.