What can be a potential consequence of failing to control erosion on a site?

Failing to control erosion on a site can lead to increased sedimentation, which often results in pollution. When soil erodes, it carries away not only soil particles but also fertilizers, pesticides, and other contaminants into nearby water bodies. This sedimentation can severely degrade water quality, harming aquatic ecosystems and potentially violating environmental regulations. Excessive sediment in rivers and streams can lead to issues such as increased turbidity, reduced light penetration, and disrupted food chains, which can ultimately harm fish and other wildlife.

In contrast, the other outcomes mentioned do not align with the consequences of erosion control failures. For example, higher project costs due to rework could be a related problem, but it is secondary to the direct environmental and ecological impacts of sedimentation and pollution. Enhanced soil fertility typically occurs when organic matter accumulates, which would not be a result of erosion. Increased visibility for contractors does not correspond to the consequences of erosion control failures; rather, it is irrelevant in the context of environmental impacts.