What is a key feature of Type A standard inlet protection?

Type A standard inlet protection is characterized by having a robust design that incorporates back and side wall support. This structural element enhances its effectiveness by preventing sediment-laden water from bypassing the protection system, thus ensuring that sediments are captured and do not enter storm drain systems. The design's stability and durability make it suitable for a variety of site conditions, where maintaining integrity against water flow is essential.

In contrast, the other options do not accurately reflect key features of Type A inlet protection. For instance, while it may be used temporarily, it can also be part of a longer-term erosion control strategy in some scenarios. The option regarding additional materials overlooks that while Type A protection may use certain inherent materials, like sandbags or silt fences for reinforcement, those are indeed part of the standard design considerations. Lastly, the cost comparison to Type B is subjective and not an inherent characteristic of Type A, as cost can vary based on implementation and materials used rather than type designation alone.