SR 21 over RELIEF


+32.52687, -89.37831
32°31'37" N, 89°22'42" W
Source: National Bridge Inventory
Information not verified. Use at your own risk.


Name:SR 21 over RELIEF
Structure number:310002106201350
Location:4.5 MI S SR 492
Purpose:Carries highway over relief for waterway
Route classification:Minor Arterial (Rural) [06]
Length of largest span:16.1 ft. [4.9 m]
Total length:34.1 ft. [10.4 m]
Owner:State Highway Agency [01]
Year built:1981
Historic significance:Bridge is not eligible for the National Register of Historic Places [5]
Design load:MS 18 / HS 20 [5]
Number of main spans:2
Main spans material:Concrete [1]
Main spans design:Culvert [19]
Deck type:Not applicable [N]

Latest Available Inspection: December 2014 

Status:Open, no restriction [A]
Average daily traffic:3,900 [as of 2012]
Truck traffic:8% of total traffic
Structural appraisal:Equal to present desirable criteria [8]
Water adequacy appraisal:Equal to present desirable criteria [8]
Roadway alignment appraisal:Equal to present desirable criteria [8]
Channel protection:Bank protection is in need of minor repairs. River control devices and embankment protection have a little minor damage. Banks and/or channel have minor amounts of drift. [7]
Culvert condition:No noticeable or noteworthy deficiencies which affect the condition of the culvert. Insignificant scrape marks caused by drift. [8]
Scour condition:Bridge foundations determined to be stable for the assessed or calculated scour condition. [8]
Operating rating:73.3 tons [66.6 metric tons]
Inventory rating:43.9 tons [39.9 metric tons]
Sufficiency rating:86.6

Previous Inspections 

DateSuff. ratingEvaluationDeckSuper.Sub.ADT
December 201486.6Not deficient---3900
December 201285.6Not deficient---4200
December 201085.6Not deficient---4200
November 200890.7Not deficient---2700
November 200690.7Not deficient---2700
January 200589.0Not deficient---3200
February 200391.7Not deficient---2400
January 200193.0Not deficient---2000
January 199993.0Not deficient---2000
April 199793.0Not deficient---2000
April 199592.7Not deficient---2100
August 199389.1Not deficient---3160
October 199193.0Not deficient---2010
November 198994.7Not deficient---1500