Specifications include, but are not limited to: Anticipated excavation depth for the removal of the existing timber bridge could be 8- feet below existing ground level. Construction depth for the new concrete bridge will vary depending upon the proposed design. The speed limit is 55 MPH; however, the road has been closed at Manix Wash to traffic since 2007, and the County would like to reopen it as quickly as possible. ; demolition of the existing two-lane timber bridge and replacing it with an American Association of State Highway and Transportation Officials (AASHTO), or approved equal, two-lane concrete bridge, guardrail, guardrail end treatments and approaches ;bridge demolition plans, development of typical sections, grading plans, geometric alignment (horizontal alignment, vertical alignment and any clearances necessary to meet current AASHTO design criteria), concrete bridge design and dimensions, temporary onsite traffic detour.