General Contractor Practice Exam

When excavating a subdivision, where should grading start from?

1. Center of the road

2. End lot stakes

3. Front lot stakes

4. Back lot stakes

The correct answer is: Front lot stakes

Grading for a subdivision typically begins at the front lot stakes because this approach facilitates proper drainage and assists in maintaining the intended elevation of the land. Starting at the front ensures that the grading aligns with the established lines of the road and the property boundaries. When grading from the front, it allows for a uniform slope towards the back of the lot, which is crucial for managing water runoff. This technique helps to prevent pooling of water at the foot of the buildings or in driveways, which can lead to structural issues and flooding concerns. Properly managing the slope from front to back also supports landscaping and utility installation, as it creates a logical flow for groundwork and surface water management. In contrast, beginning grading from the center of the road may overlook the necessary elevations at property lines and create conflict with existing drainage patterns. Starting from end lot stakes could lead to inconsistencies if not coordinated with the overall design. Starting from back lot stakes does not take into account the need for a correct slope towards the front where water naturally wants to drain, potentially creating future grading issues.