North Carolina General Contractors Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the North Carolina General Contractors Exam with our thorough preparation tools. Use flashcards and multiple-choice questions, each designed to help you understand the material better. Get ready to pass your exam with confidence!

Practice this question and more.

How deep must a silt fence be buried below grade?

6 inches
8 inches
10 inches
12 inches

The correct answer is: 12 inches

A silt fence is an essential erosion control measure utilized during construction activities to minimize sediment runoff into surrounding areas. The effectiveness of a silt fence largely depends on its installation, which includes how well it is secured to the ground. Burying the bottom of the silt fence to a depth of 12 inches below grade helps ensure that water does not flow underneath the barrier. This depth effectively creates a more secure attachment to the soil, reducing the risk of sediment bypassing the fence due to undercutting. In addition, a depth of 12 inches allows for better stability of the sediment control system, especially in areas prone to heavy rainfall or where the ground is unstable. This depth is also consistent with best practices and regulatory guidelines, which aim to provide reliable sediment control in various environmental conditions. Consequently, this depth ensures that the silt fence serves its purpose effectively and can withstand the pressures of sediment-laden water, presenting a reliable solution to erosion control on construction sites.