Transportation/ Public Works Project

Russellville Road, Douglas County, CO

Project Description:

JR Engineering designed six miles of roadway improvements for Russellville Road located in Douglas County, Colorado. The existing roadway consisted of a two-lane gravel road without shoulders. The roadway improvements included paving and widening the roadway to accommodate two twelve feet lanes and six feet shoulders; changing the horizontal and vertical alignment of the existing roadway to increase stopping sight distances; drainage improvements; retaining walls; box culvert; curb and gutter; inlets; utility coordination with all affected utilities; signage and striping. JR prepared legal descriptions and exhibits for right-of-way acquisition. The survey portion of the project consisted of aerial mapping, utility locates, ownership research, section and boundary surveying, preparation of a right-of-way plat, legal descriptions and exhibits for each ownership. All survey control was tied into Douglas County control network. JR Engineering utilized both GPS and conventional surveying techniques.

The structural design for the project included a 500-foot long, segmental, gravity-type block retaining wall, and (2) conventional cast-in-place concrete walls along Russellville Road . The block wall varied in height from 4'-0" to 12'-0" and incorporated the use of 2,000 pound interlocking concrete "Redi-Rock" retaining wall blocks. No footing was required in the design, however, due to the height of the wall and the inability to excavate behind the wall, rock anchors were utilized at various locations along the wall to ensure the stability of the structure. The resulting system was a one-of-a-kind structure, which will be viewed as a "pioneer" project. This unique approach saved the client significant costs.