Wisconsin Mound Soil Absorption System and Area FillPractice Exam

What is the recommended slope for a Wisconsin mound?

1. 2 to 1

2. 3 to 1

3. 4 to 1

4. 5 to 1

The correct answer is: 3 to 1

The recommended slope for a Wisconsin mound is typically 3 to 1. This means that for every three units of horizontal distance, there is one unit of vertical rise. This slope ratio is important for ensuring proper drainage and stability of the mound system. A 3 to 1 slope helps to maintain the integrity of the soil absorption system while allowing excess water to drain away effectively. Having a gentler slope, such as in other options like 4 to 1 or 5 to 1, could compromise the system's ability to assimilate effluent properly, while a steeper slope like 2 to 1 may lead to erosion and instability. Thus, a 3 to 1 slope strikes an appropriate balance between functionality and structural integrity in mound design.