Alkali Creek Road Slope Stabilization and Stream Relocation The project scope changed after major rainfall caused slope failure jeopardizing safety and undermining the roadway. Careful coordination and consideration and of structural alternatives led to cost savings and generated a project meeting client and public needs.

Stream Relocation Project Scope  Road Widening and Improved Sight Distance  Hydrology and Hydraulics  Slope Stabilization and Flattening  Erosion Control  Landscaping  Wetland Delineation and Mitigation  Cultural Resources Inventory and Data Recovery  Permitting Alkali Creek Relocation and Slope StabilizationACEC Category J: Small Projects

Final Design  Stream Realignment  Slope Flattening  Hydraulic Modeling  Rock Buttress  Landscape Design  Wetland Restoration Alkali Creek Relocation and Slope StabilizationACEC Category J: Small Projects

Primary Technical Challenges  Constructability in Confined Area  Overly Steep Slopes  Shallow Bedrock and Dewatering  Maintaining Traffic Throughout Construction  12-inch Water Main and Gas Main  Right-of-Way Availability  No Floodplain Impacts  Avoiding Environmental Impacts  100-year Flood Event in Consecutive Years  Protecting Wetlands & Salvaged Hydric Soil Alkali Creek Relocation and Slope StabilizationACEC Category J: Small Projects