FLOOD02047 - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I tanks and a lI-weather roads. The USDA; Soi 1 Conservation Servi ce, Soil Survey of Chaffee-LAKE AREA, 1975, was used as a basis to determine which areas, in general, have severe site development limitations. Soil limitations are rated in terms of slight, moderate and severe. -Slight: Soil properties generally favorable for the rated use of limitations that are minor and easily overcome. -Moderate: Soil properties which are unfavorable for the rated use but can be overcome or modified by special planning and design. -Severe: Soil properties are so unfavorable and so difficult to correct or overcome as to require major soil reclamation, special design, or intensive maintenance, Reference may be made to Table 1 regarding soil limitations. Severe site development constraints are found in the following soils: -J.1,arsh (r"h)-Development of any type should be prohibited in marsh areas, The water table is at or near the surface. A layer of organic matter or peat is characteristic of the marsh areas. -Mine Pits and Dumps (Mp)--Land areas in which mine pits and dumps are found may have some potential for future mining. As such, development should be prohibited. - Tomichi Sandy Loam (ToE)-Development should be prohibited on this soil where slopes are in excess of 15 percent. ~;oderate limitations may be en- countered on slopes of 8 to 15 percent. It would appear that development would be compatible on slopes less than 15 percent provided the specific site was investigated and the development was designed to mitigate poten- tial problems. The shrink-swell potential is rated as low, -Troutville Gravelly Sandy loam (TrE)--As with the Tomichi Sandy loam, development should be prohibited on slopes of 15 percent or more. The shrink-swell potential is rated as low. -Wet Alluvial Land (Wa)--Development of any type should be prohibited. -Rock Outcrop (Ro)--Development should be prohibited. -Bross (Brf)--Development on Slopes 15 percent or more should be prohib- ited. The shrink-swell potential is rated as low, Beyond the areas excluded above, there are a number of areas which may support a proposed development. However, it should be noted that a given soil mapping unit may contain isolated kinds of other soils that have different properties. As such, a detail site investigation should be required prior to approval, of a proposed development action. 2. UNSTABLE SLOPES: In association with certain soils, unstable or potentially unstable slopes may be found. H. B. 1041 defines an unstable slope as one susceptible to a landslide, a mudflow, rockfall, or accelerated creep of slope-forming materials. Development may be permitted where mitigating measures can be taken to minimize certain prob- lems associated with an unstable slope. It should be noted that a man-induced ac- tion may contribute to landslides, mudflows, rockfalls and creep potential. 6 .