What type of fill should be used for surface water structures near embankments?

Using a fill material that is similar in type and quality to the adjoining materials is essential for surface water structures near embankments because it ensures compatibility and stability. When the fill material is consistent with the existing materials, it helps maintain the structural integrity of the embankment, reducing the risk of settlement or erosion that could arise from using inappropriate materials.

Consistent materials create a unified response to environmental stresses such as water flow, temperature variations, and vegetation growth. This prevents potential weaknesses in the embankment that could lead to failures or excessive maintenance needs over time.

This approach is also important in preventing issues like differential settlement, where variations in fill materials can lead to uneven support and possible structural failure or damage to the surface water management system. Properly matched fill materials contribute to the overall performance of the drainage and hydrology in the vicinity of the embankment, thus enhancing the effectiveness of stormwater management practices.