Status
Indicates the current status of the pipe; e.g., Operational, Planned, Non-Operational, Retired, etc. Any pipe with a code value less than 950 is considered to be currently operational and in use. Those with a value of 950 and greater are considered nonoperational.
Note: Users cannot add nonoperational assets to work orders.
Last Cleaning Date
Indicates the date of the last cleaning.
Cleaning Freq
States how often the structure should be cleaned. The type of units indicated here is stored in the Cleaning Freq Units field.
Next Cleaning Date
Marks the date of the next cleaning. This date can be added manually or calculated automatically based on the Clean Freq and Cleaning Freq Units fields.
Cleaning Freq Units
Specifies the type of units used in the Cleaning Freq field (i.e., weeks, months, etc.).
Pipe Shape
Provides a predefined list of shapes, which helps calculate the Capacity field. Although users can add shapes to the list, the predefined shapes cannot be modified. Any shapes added to the list are calculated as round pipes in the Capacity field. The value selected in this field changes the functionality of the Dia/Height and Pipe Width fields.
Dia/Height (in)
Records the diameter of a round pipe in inches. If the pipe is not round, enter the height in inches.
Pipe Width (in)
Records the distance across the pipe if the pipe is not round. This field is only enabled if the Pipe Shape is not round.
Length (ft)
Records the length of the pipe, in feet, from the center of the upstream manhole to the center of the downstream manhole.
Note: Length can be calculated automatically by clicking in the field and pressing F5 if the US Station and DS Station fields are populated on the Construct tab.
Pipe Sec Length (ft)
Pipes are put together in sections. While a pipe may be 100 ft it is made up of 10 ft sections. Enter the average length of a section in this field.
Est # of Joints
Joints are where two pipe sections meet together. This field provides and estimate of the number of joints found on the pipe. Calculates the number of joints as: (Pipe Sec Length / Length) = Est # of Joints. The figure is used in the Sewer Rehab calculations.
Slope %
Describes the vertical displacement along the length of the pipe as it relates to the horizontal displacement along the length of the pipe (otherwise known as the rise/run).
If the US Invert and DS Invert fields (Elevations tab) and the Length field (Attributes tab) are filled out, this field is calculated automatically using the following formula:
[(US Invert - DS Invert) / Length] x 100 = Slope %
If any of these three values do not exist within the record, a slope value can be entered manually without having to "lock" the slope.
Slope Lock
Keeps the system from calculating the Slope field automatically. This box is automatically marked when users manually enter a figure in the Slope field.
Mannings
Records the value assigned to a pipe based on its interior roughness. This value is used to calculate the pipe's capacity.
Capacity (cfs)
Indicates the maximum amount of flow the pipe is capable of holding (in cubic feet per second). Capacity is based on the pipe diameter, its Manning's number, and its slope. The program calculates Capacity using the following equation:
Manning's Equation:
Q= Quantity of flow
A= Cross-sectional area
R= Hydraulic radius (in feet)
S= Slope of the pipe (rise/run)
n= Manning's number
Note: The hydraulic radius is calculated using the following formula: Cross-sectional area (square feet)/perimeter of the pipe (feet).
IDM
Refers to inch-diameter-mile, which is calculated as: (Diameter x Length)/5280 feet.
Flow Basin
Identifies the flow basin where the upstream sewer structure is located. This field is populated automatically if the flow basins are defined and the flow basin outlets are populated in the Flow Basin Inventory module.
Pump Station ID
Relates the pipe to a record from the Pump Station module. This is useful for pipes that are completely within a pump station or are related to it in some other way. Click the field caption button or press F9 for list of related records.
Plant ID Entering Plant
Links the sewer pipe to a plant. This field appears on the plant's Sewer Pipes Tab > Incoming Pipes grid. Click the field caption button or press F9 for list of plant records.
Plant ID Leaving Plant
Links the sewer pipe to a plant. This field appears on the plant's Sewer Pipes Tab > Outgoing Pipes grid. Click the field caption button or press F9 for list of plant records.