Slopes need to be protected when high maintenance costs are anticipated. The District will determine where slopes are to be treated and the type of treatment to be used. Caltrans maintenance, landscape architecture, materials, design, and other interested units will furnish input to determine slope treatment needed at each site. Local agency input should be obtained as necessary for urban undercrossings. All types of slope treatments require adequate drainage facilities for water from upper roadway.
Inadequate drainage is a major source of slope erosion.
Full slope paving has high initial costs and low maintenance costs. It may be justified where anticipated maintenance costs will be high due to erosion by pedestrians, wind, small amounts of water, or other causes. High landscape maintenance costs caused by inadequate moisture, sunlight, etc., may also justify use of full slope paving. Elaborate slope paving designs should be avoided. The District Landscape Architect will provide aesthetic input and locations for waterline crossover conduits.