|
Poor |
Critical |
---|---|---|
Invert Deterioration |
Perforations visible and/or connection hardware failing (metal) Heavy abrasion and scaling with exposed steel reinforcement (concrete) Heavy abrasion or scour damage (plastic) Displaced mortar and/or blocks, holes in invert area (masonry) |
Holes or section loss with extensive voids beneath invert and/or embankment/roadway damage Holes and gaps with extensive infiltration of soil, bedding or backfill material (masonry) |
Joints and Seams |
Open or displaced with significant infiltration of soil and/or leakage of water and voids visible Missing mortar or displaced blocks (masonry) |
Open or displaced with significant infiltration of soil and accompanying embankment/roadway damage |
Cross-Section Deformation |
Significant perceptible deformation Deformation with accompanying longitudinal cracking (concrete) |
Excessive deformation resulting in significant reduction of available flow area, and/or extensive infiltration of soil, voids, structural failure or embankment/roadway damage |
Structural Integrity of Barrel |
Open cracks >1/8” wide (concrete) or missing and/or displaced blocks (masonry) with voids and significant infiltration of soil and/or leakage of water Several splits, tears and cracks >6” long (plastic) Significant deformation of liner or wall buckling (plastic) Heavy rust staining and/or exposed steel reinforcement in sides and top of barrel (concrete) |
Cracks, tears, splits, bulges, holes or section loss have led to extensive infiltration of soil, structural failure, voids and embankment/roadway damage |
Channel Alignment |
The stream channel approaches the crossing at an angle of 45-70 degrees from the centerline of the structure. |
The stream channel approaches the crossing at an angle of 70-90 degrees from the centerline of the structure. |
Structural (Longitudinal) Alignment |
Significant horizontal or vertical misalignment of the pipe (Note: do not confuse this with constructed pipe bends) |
Significant misalignment resulting in deformation of pipe or embankment/roadway damage |
Footings |
Top portion of footing exposed, but no cracking or breaking off of flakes or chips |
Footing exposed with signs of cracking or breaking off of flakes or chips Bottom of footing exposed and/or undercut |
Headwall/Wingwalls |
Cracking or breaking off of flakes or chips affecting >50% of area and/or exposed steel reinforcement Gap >4” between barrel and wall Footing exposed and undermined |
Partially or totally collapsed with damage to embankment/roadway |
Flared End Section |
Significant cracks, piping or undermining affects >50% of section End crushed or separated from barrel |
Deterioration is significantly affecting performance and/or causing embankment/roadway damage |
Bouyancy or Crushing |
Light to moderate denting or deformation of inlet and/or outlet end of flexible pipe culvert. The invert of the inlet is at the streambed elevation (no uplift). |
Invert of inlet bent upward above streambed or mitered edges crumpled inward. |
Blockage at Opening |
Debris/sediment/vegetation blocks 1/3 of more of the inlet opening |
Sediment blocks more than ½ the inlet opening (and not designed that way for aquatic organism passage) |
Apron Protection |
Significant cracking affects >50% of apron. Significant piping or undermining. |
Partially or totally collapsed, significantly affecting performance and/or causing embankment/roadway damage. |
Embankment Piping |
Slight pavement cracking above the culvert, perhaps with a noticeable bump/depression when driving, but no evidence of holes in the embankment or soil infiltration in the culvert barrel. |
Partially or totally failed, significantly affecting performance and/or causing embankment/roadway damage or undermining of the culvert barrel or footings. |