CS-R01: Inyo 395 Rehabilitation Near Fish Springs

CalME can be used to identify design alternatives that are needed for life cycle cost assessment (LCCA) and life cycle assessment (LCA). Each design is based on the engineering inputs such as the existing structure, design requirements (life, grade change allowed), environment, traffic, and maintainability.

The steps to using CalME include the following:

•Collect all relevant information about the project

•Pavement structure information based on as-built designs, ground penetrating radar surveys, and dynamic cone penetrometer (DCP) testing, visual surveys, and forensic investigations.

•Pavement layer conditions based on falling weight deflectometer (FWD) results, and DCP testing.

•Material properties and material types from cores and soil sampling for material characterization.

•Design requirements.

•Design traffic.

•Develop alternatives for design strategies (lane replacement, straight overlay, mill and overlay, full depth recycling, partial depth recycling, etc.)

•Run CalME to determine the design structure meeting all requirements and traffic for each alternative

These designs can then be included in LCCA and LCA for economic and environmental review before making design recommendations.

This case study illustrates how the above process is applied to the rehabilitation of the southbound section of state highway 395 in Inyo County, between PM 91.6 and PM 99.03.

Several assumptions were made where information is missing to illustrate how available guidelines can be used to design possible structures that meet the design requirements.