What is defined as the intersection of existing ground and constructed grade?

Answer: C — Catch point

The intersection of existing ground and constructed grade is referred to as the catch point. This term describes the location where the slope of the finished grade meets the natural ground surface. Understanding this concept is crucial when determining how water will flow and how slopes will behave, especially in highway construction where proper drainage and erosion control are essential. In a construction context, catch points help engineers and inspectors assess the effectiveness of drainage systems and address potential issues related to water accumulation or runoff. Recognizing this intersection aids in ensuring that the constructed features are in alignment with the design intent, facilitating proper implementation in the overall grading and drainage plans. While the other terms have their specific applications, they do not represent the intersection of existing and constructed grades. For instance, a cut point typically refers to areas where material has been removed to achieve the desired grade, while a fill point is where additional material has been added. Grade point can refer generally to the established elevation of a given point on a project, but it doesn't specifically denote the intersection as clearly as catch point does.