US Bridges

Pk 607(BLKHAWK) over Black Hawk Lake

Fair

Sac County, Iowa · Black Hawk Lake St. Park · Structure no. 000000000699071

Built
1989
36 years old
Condition
Fair
inspected September 2023
Type
Channel Beam
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
—
2022 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Pk 607(BLKHAWK) over Black Hawk Lake is a prestressed concrete channel beam carrying Pk 607(BLKHAWK) over Black Hawk Lake in Sac County, Iowa. It was built in 1989, so it is 36 years old, younger than the Iowa average of 45.5 years.

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

No traffic count is recorded. The structure is 48 ft (14.6 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPk 607(BLKHAWK)
CrossesBlack Hawk Lake
LocationBlack Hawk Lake St. Park
RouteState Lands Road 0
CountySac County
StateIowa
Coordinates42.29928, -95.04367
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.9 US tons
Inventory rating38.3 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length48 ft (14.6 m)
Longest span43 ft (13.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Pk 607(BLKHAWK) over Black Hawk Lake built?

It was built in 1989, making it 36 years old in 2025.

What condition is Pk 607(BLKHAWK) over Black Hawk Lake 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 September 2023.

How much traffic does Pk 607(BLKHAWK) over Black Hawk Lake carry?

No traffic count is recorded for this structure.

How long is Pk 607(BLKHAWK) over Black Hawk Lake?

The structure is 48 ft (14.6 m) long with a longest span of 43 ft (13.1 m) and a deck 32 ft wide.

Who owns Pk 607(BLKHAWK) over Black Hawk Lake?

It is owned by the State Park, Forest, or Reservation Agency.