US Bridges

Dam Rd. over Shawnee Lake Spillway

PoorPosted for load

Pottawatomie County, Oklahoma · 2. N 2.9 W Bethel Acre · Structure no. 151920000000000

Built
1960
65 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
324 ft
8 main spans
Daily traffic
175
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dam Rd. over Shawnee Lake Spillway is a concrete stringer/multi-beam or girder carrying Dam Rd. over Shawnee Lake Spillway in Pottawatomie County, Oklahoma. It was built in 1960, so it is 65 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 175 vehicles a day, roughly 5% of them trucks, projected to reach 280 by 2042. The structure is 324 ft (98.8 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesDam Rd.
CrossesShawnee Lake Spillway
Location2. N 2.9 W Bethel Acre
RouteCity Street 5498
Coordinates35.34974, -97.06946
Functional classUrban Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33 US tons
Inventory rating20 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadH 10
Structure length324 ft (98.8 m)
Longest span40 ft (12.2 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2022)
Projected traffic280 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$929,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Dam Rd. over Shawnee Lake Spillway built?

It was built in 1960, making it 65 years old in 2025.

What condition is Dam Rd. over Shawnee Lake Spillway in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Dam Rd. over Shawnee Lake Spillway carry?

About 175 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Dam Rd. over Shawnee Lake Spillway?

The structure is 324 ft (98.8 m) long with a longest span of 40 ft (12.2 m) and a deck 24 ft wide.

Who owns Dam Rd. over Shawnee Lake Spillway?

It is owned by the City or Municipal Highway Agency.