17-293 - 128TH Avenue and Washington St Intersection Improvements, Project No. 17-293

Project Description:  Thornton requires Engineering and Design Services for Intersection improvements at 128th Avenue and Washington Street.  
 
Services include the engineering, surveying, planning, and coordination necessary to design double left turn lanes in the northbound and southbound directions at the intersection of 128th Avenue and Washington Street and, at minimum, includes:
 

• All widening is anticipated to occur on the east side of this intersection; 

• Landscaping will include restoration of existing grass, tree replacement, installation of island patterned concrete, and restoration of the planting area for the relocated “Hunters Glen” Homeowner Association (HOA) monument sign located in the northeast quadrant of the Project;

• Traffic signal poles on the east side of Washington Street will need to be relocated;
• Relocation of existing fiber optic line is required; 
• Storm sewer inlet relocation is required to widen Washington to the east;
• Right-of-way (ROW) acquisition will be required with this Project;
• The existing north bound right turn lane from Washington Street to east bound 128th Avenue will be shifted east and included within the design; and
• Note: Project site is outside of mapped floodplain.

• Provision of complete construction plans, specifications, bid plans and package as required for construction of improvements;
• Four (4) legal descriptions and revisions for ROW and easement acquisition process for two (2) parcels as defined by the Thornton Project Manager;
• Complete ROW plans in accordance with Colorado Department of Transportation (CDOT) standards;
• Electrical drawings for fiber relocation;
• Engineering and Design for all pedestrian crosswalks, ramps, and sidewalks within Project limits;
• Engineering and Design needed to relocate “Hunters Glen” HOA monument sign located in the northeast quadrant of the Project intersection;
• Utility, stormwater, demolition, traffic control (to be recommended by proposers), traffic signal modification, signing and striping, etc., and any and all drawings required for successful advertising of this Project.