Alternative 3 – Stream Stabilization Sample Clauses

Alternative 3 – Stream Stabilization. This Alternative proposes to stabilize a stream segment of an unnamed tributary of Cattail Creek within the City of Hopewell. The stretch of stream is approximately 800 feet and is regularly impeded with woody debris and sediment scoured from the upstream channel. Visual observation has been impeded by heavy vegetation, but it is likely that this embankment is undergoing erosion and is in danger of being undermined, leading to possible failure of the adjacent sidewalk and roadway. Work would involve stabilization of the embankment with an armored retaining wall and installing stream channel stabilization to the extent allowed by the U.S. Army Corps of Engineers (USACE) and VDEQ. A sediment forebay and/or debris screen would be installed to minimize the obstruction of the culverts while also facilitating regular cleaning by City of Hopewell personnel. Completion of this project will provide reductions in sediment, nutrients, trash and debris being transported into Cattail Creek and the Xxxxx River. The restoration of the natural resources located in the areas described in this Alternative will result in unknown impacts which are suspected to be minimal and of a temporary nature biologically. Construction will produce a temporary increase in sediment and turbidity to the creek from the disturbance of soil and placement of fill. Haul trucks and construction equipment may produce dust. Access to this project site and the creek channel by construction equipment will most likely produce temporary disruptions in traffic flow and temporary impacts to private property. These impacts will require the use of erosion and sediment control measures detailed in an approved erosion and sediment control plan by the county and state water quality regulators. Long-term consequences of the actions will be increased native vegetation and reduced bank erosion leading to improved water quality, diversity of aquatic habitat, and restored riparian habitat. The Trustees determined that this restoration Alternative would result in negligible change in public use of the affected areas and would not individually or cumulatively have a significant permanent impact on the human environment. The Trustees found this Alternative to be technically feasible but costly with varying levels of success due to the uncertainty of permitting allowances from the federal and state agencies, so it was not a Preferred Alternative. Table 3-1. Evaluation of Restoration Alternatives for the Gravelly Run h...