Oregon Construction Contractors (CCB) Practice Test

What are the implications of excessive sediment from construction sites?

1. It can improve aquatic habitats

2. It can quickly fill rivers and lakes

3. It has no significant environmental impact

4. It enhances the accumulation of natural sediments

The correct answer is: It can quickly fill rivers and lakes

Excessive sediment from construction sites can significantly affect water bodies by rapidly filling rivers and lakes. This process, known as sedimentation, can lead to various environmental issues, such as reducing the depth of waterways, altering flow patterns, and impacting aquatic ecosystems. Excess sediment can smother habitats for fish and other aquatic organisms, decrease water quality by increasing turbidity, and disrupt the balance of nutrient cycles in these ecosystems. Furthermore, when rivers and lakes become overly filled with sediment, it can lead to increased flooding risks because the waterways can no longer accommodate their normal volume of water. This leads to heightened concerns regarding erosion and the health of surrounding habitats. The implications extend beyond just ecological impacts, as they can also impose economic burdens related to water management, infrastructure upkeep, and restoration efforts. In contrast to the other options, which either suggest positive outcomes or dismiss the significance of sediment impacts, the reality is that excessive sediment can have profound negative consequences on both the environment and human activities.