Common use of Runoff Clause in Contracts

Runoff. The increase in impervious surface area would increase the current volume of runoff from the area. Runoff from new roads, if not collected and treated, would create temporary, localized increases in water turbidity of drainage pathways and in the Tongass Narrows (see the discussion of turbidity effects in Section 3.1.1). In addition, some contaminants such as oil and metals from vehicle brake dust are also likely to reach the drainage pathways and Tongass Narrows. In the climate of Ketchikan, frequent rainfall would limit accumulation of these materials on roadways. Thus, it is unlikely that these materials would run off the bridge or roadways in concentrations that would create conditions harmful to biota; again, the high circulation rates in Tongass Narrows would quickly dilute and dissipate any releases.

Runoff. The increase in impervious surface area would increase the current volume of runoff from the area. Runoff from new roads, if not collected and treated, would create temporary, localized increases in water turbidity of drainage pathways and in the Tongass Narrows (see the discussion of turbidity effects in Section 3.1.13.1. 1). In addition, some contaminants such as oil and metals from vehicle brake dust are also likely to reach the drainage pathways and Tongass Narrows. In the climate of Ketchikan, frequent rainfall would limit accumulation of these materials on roadways. Thus, it is unlikely that these materials would run off the bridge or roadways in concentrations that would create conditions harmful to biota; again, the high circulation rates in Tongass Narrows would quickly dilute and dissipate any releases.