US Bridges

Miller Bay Road over Grovers Creek

Good

Kitsap County, Washington · 0.02 S JCT Indianola RD · Structure no. 087553000000000

Built
2007
18 years old
Condition
Good
inspected May 2024
Type
Slab
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
10,849
2023 count
Owner
County
County Highway Agency

About this bridge

Miller Bay Road over Grovers Creek is a prestressed concrete slab carrying Miller Bay Road over Grovers Creek in Kitsap County, Washington. It was built in 2007, so it is 18 years old, younger than the Washington average of 49.8 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 10,849 vehicles a day, roughly 12% of them trucks, projected to reach 11,934 by 2043. The structure is 51 ft (15.5 m) long and 62 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesMiller Bay Road
CrossesGrovers Creek
Location0.02 S JCT Indianola RD
RouteCounty Highway 70370
Coordinates47.77418, -122.55695
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionMay 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.8 US tons
Inventory rating76.8 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length51 ft (15.5 m)
Longest span47 ft (14.3 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,849 (2023)
Projected traffic11,934 by 2043
Trucks12%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Miller Bay Road over Grovers Creek built?

It was built in 2007, making it 18 years old in 2025.

What condition is Miller Bay Road over Grovers 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 May 2024.

How much traffic does Miller Bay Road over Grovers Creek carry?

About 10,849 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Miller Bay Road over Grovers Creek?

The structure is 51 ft (15.5 m) long with a longest span of 47 ft (14.3 m) and a deck 62 ft wide.

Who owns Miller Bay Road over Grovers Creek?

It is owned by the County Highway Agency.