VegetatedFilterStrip

Attachment

The attachment point is at the inside edge of the Vegetated Filter Strip. This component can be attached to either the left or right side.

Input Parameters

Note: All dimensions are in meters or feet unless otherwise noted. All slopes are in run-over-rise form (for example, 4 : 1) unless indicated as a percent slope with a “%” sign.

Parameter	Description	Type	Default
Side	Specifies which side to place the subassembly	Left / Right	Right
Include French Drain Outlet	Include French drain outlet at end of filter	Yes / No	Yes
Berm Slope	Slope of berm	Numeric, positive	1 ( : 1)
Berm Width	Width of berm	Numeric, positive	2 ft 0.60 m
Berm Height	Height of berm	Numeric, positive	0.5 ft 0.15 m
Include Berm at Toe	Include berm at toe to contain water	Yes / No	Yes
Planting Soil Depth	Planting soil depth	Numeric, positive	1.5 ft 0.45 m
Include Planting Soil	Include planting soil	Yes / No	Yes
VFS Grade	Vegetated filter strip grade	Numeric	-10%
VFS Width	Vegetated filter strip width	Numeric, positive	15 ft 4.5 m
French Drain Pipe Diameter	French drain pipe diameter	Numeric, positive	0.5 ft 0.15 m
French Drain Depth	French drain depth	Numeric, positive	1 ft 0.3 m
French Drain Width	French drain width	Numeric, positive	1 ft 0.3 m

Target Parameters

This section lists the parameters in this subassembly that can be mapped to one or more target objects. For more information, see To Specify Corridor Targets.

Parameter	Description	Status
VFS Width	May be used to override the vegetated filter strip offset value and tie the edge to an offset alignment. The following object types can be used as targets for specifying the width: alignments, polylines, feature lines, or survey figures.	Optional
VFS Elevation	May be used to override the vegetated filter strip and tie the elevation to the elevation of a profile. The following object types can be used as targets for specifying the elevation: profiles, 3D polylines, feature lines, or survey figures.	Optional

Runtime Logical Assignments

None.

Output Parameters

None.

Behavior

Starting at the attachment point, a finish grade surface and parallel subgrade are inserted using the given width and depth. Vertical links close the shape at either end of the vegetated filter strip. An optional berm is built at the far end of the vegetated filter strip. An optional French drain is constructed at the end of the vegetated filter strip.

Layout Mode Operation

In layout mode, this subassembly displays all links using the input parameters.

Point, Link, and Shape Codes

The following table lists the point, link, and shape codes for this subassembly that have codes assigned to them. Point, link, or shape codes for this subassembly that do not have codes assigned are not included in this table.

Point, Link, or Shape	Code	Description
P2	Filter_Outside	Outside edge of vegetated filter strip
P5-P7	Berm
P11	Pipe_Invert	Invert of the French drain pipe
L1	Filter, Top	Top of vegetated filter strip
L2, L7	Datum
L5	Top, FrenchDrain	Top of French drain
L9	Pipe
L10-12	Berm
S1	VFS	Vegetated filter strip
S2	Berm
S3	FrenchDrain	French drain