The Defects tab allows users to document the defects found at each component in the sewer structure (cover, frame, cone, wall, bench, etc.). It also allows users to document the severity and density of broken components, corrosion, and roots. In addition, they can indicate flow rate, general condition, infiltration and inflow (I/I), and the number of holes, cracks, or joints.
The S and D columns stand for severity and density. Severity describes the degree of the defect. Density refers to the amount of the structure that is affected by the defect.
Column Definitions
The fields and columns used in this tab are described in the table below:
Column Names |
Definition |
Flow Rate |
The potential the structure component has for inflow or infiltration (I/I). |
Flow Actual |
The actual I/I in the structure observed during the inspection. |
General Condition |
The general condition of the structure. The rating information entered in this column supersedes the severity and density ratings in the columns to the right. Condition is evaluated on a scale of 1 to 3 (1 - Good, 2 - Fair, 3 - Poor). |
Broken Corrosion Roots |
The severity (S) and density (D) of cracks and breaks, corrosion, and roots observed in the structure. Severity is evaluated on a scale of 0 for none to 3 for heavy. Density is evaluated on a scale of 0 for none to 4 for greater than 50 percent. Note: Information about the Severity and Density ratings are in the table below. |
I/I Code and Type |
The code and type used for flow potential: 1-Inflow, 2-Infiltration. |
Number of
|
The number of holes, cracks, and joints observed in the cone or the manhole wall. |
Valid Severity and Density Entries
The numerical entries in the Severity and Density columns (S and D) cannot be customized by an agency at this time. Valid entries are listed in the table below:
Column |
Possible Numerical Entries |
S (severity) |
0 1 = Light 2 = Moderate 3 = Severe |
D (density) |
0 1 = <10% 2 = 10- 25% 3 = 25- 50% 4 = >50% |