US Bridges

CR 850 E over Boston Creek

FairPosted for load

Sullivan County, Indiana · 00.30 S of CR 1100 N · Structure no. 7700257

Built
1935
90 years old
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete
Length
42 ft
1 main span
Daily traffic
110
2011 count
Owner
County
County Highway Agency

About this bridge

CR 850 E over Boston Creek is a concrete arch - deck carrying CR 850 E over Boston Creek in Sullivan County, Indiana. It was built in 1935, so it is 90 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 110 vehicles a day, roughly 2% of them trucks, projected to reach 130 by 2031. The structure is 42 ft (12.8 m) long and 17 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCR 850 E
CrossesBoston Creek
Location00.30 S of CR 1100 N
RouteCounty Highway 363
CountySullivan County
StateIndiana
Coordinates39.24002, -87.24983
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18 US tons
Inventory rating14 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span36 ft (11.1 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2011)
Projected traffic130 by 2031
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$522,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 850 E over Boston Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is CR 850 E over Boston Creek 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 July 2023.

How much traffic does CR 850 E over Boston Creek carry?

About 110 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is CR 850 E over Boston Creek?

The structure is 42 ft (12.8 m) long with a longest span of 36 ft (11.1 m) and a deck 17 ft wide.

Who owns CR 850 E over Boston Creek?

It is owned by the County Highway Agency.