MSAS 430

over MINNEHAHA PKWY; CREEK

1.7 MI N OF JCT CSAH 53, Hennepin County, Minnesota

Condition

Poor

Year Built

1923

Daily Traffic

10,700

Length

82 ft

About This Bridge

MSAS 430 carries traffic over MINNEHAHA PKWY; CREEK in Hennepin County, Minnesota. Built in 1923, this structure is 103 years old, making it a historic structure that has served the community for generations. The bridge features concrete construction with a arch - deck design, a combination chosen by engineers to meet the specific requirements of this crossing.

Approximately 10,700 vehicles cross this bridge daily, representing moderate traffic volumes typical of important regional connectors. This level of usage requires regular monitoring to ensure continued safe operation.

The bridge is currently rated in poor condition based on federal inspection criteria established by the Federal Highway Administration. It is classified as structurally deficient, meaning one or more components have received a rating of 4 or below on the 0-9 scale. This designation indicates significant deterioration that warrants attention, though the bridge remains safe for travel within its posted limits. Structurally deficient does not mean unsafe—rather, it signals that repairs or replacement should be prioritized in transportation planning. With a total length of 82 feet, this is a shorter span typical of local road crossings, often carrying traffic over small streams, drainage channels, or other roadways.

Concrete bridges offer excellent durability and relatively low maintenance requirements. They resist corrosion well but can develop cracking over time, particularly in regions with freeze-thaw cycles or heavy use of deicing chemicals. Regular inspection focuses on detecting cracks, spalling, and reinforcement corrosion.

Federal law requires that all highway bridges be inspected at least every 24 months by qualified inspectors following the National Bridge Inspection Standards (NBIS). Some bridges with known issues or unusual characteristics may be inspected more frequently. Inspection data is reported to the National Bridge Inventory, a database maintained by the Federal Highway Administration that tracks the condition of all public highway bridges in the United States. This bridge data is sourced from that federal database and reflects the most recent available inspection results.

Condition Ratings

Structurally Deficient

This bridge has one or more component ratings of 4 or below, indicating significant deterioration that requires attention. The bridge remains safe for travel but may have load restrictions.

4

Deck Condition

Poor

5

Superstructure

Fair

4

Substructure

Poor

5

Channel & Protection

Fair

4

Lowest Rating

Determines condition category

NBI condition ratings range from 0 (failed) to 9 (excellent). Ratings of 4 or below are considered poor. The overall condition category is determined by the lowest individual component rating.

The deck rating of 4 indicates advanced deterioration affecting the driving surface. The substructure rating of 4 reflects significant wear in piers, abutments, or foundations.

For a structure built in 1923, the current condition reflects the cumulative effects of age, traffic, and environmental exposure.

Bridge Details

Concrete is the primary structural material, which influences maintenance requirements and expected lifespan. The arch - deck design was selected based on span requirements, load capacity needs, and site conditions at the time of construction. Maintenance responsibility falls to City/Municipal.

Construction

Year Built1923
MaterialConcrete
Design TypeArch - Deck
OwnerCity/Municipal

Dimensions

Total Length82 ft (24.9 m)
Max Span9 ft (2.9 m)
Deck Width6 ft
Deck Area4,737 sq ft

Span dimensions affect structural design choices and load distribution. The deck area of 4,737 sq ft determines surface maintenance scope.

Classification

Route TypeCity Street
Route Number43
Lanes On Bridge2
Lanes Under Bridge2

Status

Toll BridgeNo
Historical SignificanceEligible for NRHP
Scour Critical8
Detour Length1 mi (2 km)

Traffic Data

Traffic volume data helps engineers assess bridge wear patterns and plan maintenance schedules. Average Daily Traffic (ADT) counts are updated periodically and represent typical weekday usage.

10,700

Avg Daily Traffic (2019)

Vehicles per day crossing this bridge

Truck Traffic

Commercial vehicle percentage

8,948

Projected Future ADT

Estimated future demand

This bridge carries approximately 10,700 vehicles per day, translating to roughly 3,905,500 crossings annually. This moderate traffic level is typical for regional connectors.

Traffic projections estimate future volumes of 8,948 vehicles daily, a decrease from current levels. These projections inform capacity planning and potential upgrade requirements.

Load Ratings

Load ratings determine what weight this bridge can safely support. These values are critical for routing heavy vehicles and issuing overweight permits.

Operating Rating

4.9 tons

Maximum allowable load for special permits

Inventory Rating

2.9 tons

Load level for normal traffic

The operating rating of 4.9 tons represents the absolute maximum load this bridge can carry under controlled conditions with special permits. The inventory rating of 2.9 tons is the safe load limit for everyday traffic without restrictions. These relatively low ratings may result in posted weight limits or route restrictions for heavy vehicles.

5-Year Condition Trend

Declining

Condition has declined by 1.0 rating points since 2020

Status Changes

  • Entered poor condition in 2022
  • Became structurally deficient in 2022

Data: 2020-2024 FHWA National Bridge Inventory

Location

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45.660000, -94.408333

Identification

Structure Number90591
NBI IDMN-90591
State FIPS27
County FIPS053

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Data Source: Federal Highway Administration (FHWA) National Bridge Inventory 2024

Bridge inspection data is typically updated every 24 months. Conditions may have changed since the last inspection.

“Structurally deficient” does not mean a bridge is unsafe or likely to collapse. It indicates that one or more key structural elements are in poor or worse condition. Bridges are inspected regularly and may have load restrictions in place.

This data is for informational purposes only and should not be used for route clearance or vehicle weight decisions.

MSAS 430 over MINNEHAHA PKWY; CREEK | Minnesota