Which information is NOT commonly included in a culvert construction survey?

In a culvert construction survey, specific details about the physical attributes and geometry of the culvert are typically recorded to ensure proper design and implementation. The culvert end inverts, culvert length, and the skew number or angle are all critical elements that influence drainage efficiency and are essential for maintaining road stability.

The culvert end inverts record the elevation at which the culvert meets the ground surface, which is vital for understanding the water flow level and ensuring proper drainage. The culvert length provides vital information about how far the structure extends, which is useful for planning and construction purposes. The skew number or angle is also important, as it indicates how the culvert intersects the road or stream, which can affect water dynamics and structural integrity.

On the other hand, while the selection of construction materials is an important aspect of the overall culvert design and construction process, the specific materials used are generally determined outside of the survey itself. Surveys focus more on the physical layout and geometrical aspects rather than the materials chosen for the construction. Therefore, this information is not typically included in the culvert construction survey documentation, making it the correct answer for what is not commonly included.