This value can be determined from the Drain Spacing Tool, here.
1- Zoom in to the area of interst.
2- Turn on the "USA Soil Survey" layer in the bottom-left corner of the tool.
3- Draw a polygon inside the shaded color of a soil type.
4- Click on "calculate" to run the tool.
5- Find the depth to restrictive layer on the Output page.

Type of lateral drain pipe affects how fast water enters the pipe.
When there is no drain sedimentation problem, use an 8-row regular-perf pipe to lower the water table more quickly than a 4-row regular-perf pipe.
When there is a drain sedimentation problem, use either a sock-wrapped or 8-row narrow-slot pipe. A sock-wrapped pipe lowers the water table most quickly because it maximizes water entry into the pipe. An 8-row narrow-slot pipe lowers the water table more quickly than a 4-row narrow-slot pipe.
For more information, click here.

This value can be determined from the Drain Spacing Tool, here.
1- Zoom in to the area of interst.
2- Turn on the "USA Soil Survey" layer in the bottom-left corner of the tool.
3- Draw a polygon inside the shaded color of a soil type.
4- Click on "calculate" to run the tool.
5- Find the equivalent saturated hydraulic conductivity of that soil type on the Output page.