Agenda - Parks and Recreation Commission - 04/10/1997

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Table 2. Soil Limitations Soft Series Ca'ap Sites Paths and Trails Picnic Sites Play Urban Farming Crrounds Development Alluvial land Severe Severe Severe Severe Severe Severe Becker Severe Moderate Moderate Moderate Severe Moderate Cut and fill land Moderate Severe Moderate Moderate Slight Severe Dickmau, 0-2% Slight Slight Slight Slight Slight Severe slo~s Dickman, 2-6% Slight Slight Slight Moderate Slight Severe slopes Gravel pit Severe Severe Severe Severe Severe Severe Hubbard, 0-2% Moderate Severe Moderate Moderate Slight Severe slopes Hubbard, 2-6% Mederate Severe Moderate Moderate Slight Severe slopes Hubbard, 6-12% Moderate Severe Moderate Severe Moderate Severe slopes Source: USDA, 1977 Becker Very Fine Sandy Loam Becker very fine sandy loams are found in relatively flat areas (0-3% slopes) that are moderately well-drained. This soil is found in areas primarily along the southern edge of the park mainland. This soil series has loamy sediments in the upper portion and is underlain with outwash sands. Permeability on this soil is moderately rapid and the available water capacity is high. Generally, the nitrogen content for this soil is high, while the phosphorus and potassium contents are medium. The Becker series is known to be occasionally flooded, which is its major limitation for furore development. It is well suited to woodland uses, as an open space or a park, or for crops if minimum tillage is used. Severe limitations exist for urban development uses (foundations, roads and streets, dwellings with basements, and septic tanks) molly because of the likelihood of flooding. Camp sites are listed as severe due to the flooding potential, but picnic sites, playgrounds, and paths and trails have moderate limitations. Moderate limitations can be overcome if special planning, design or maintenance is used in the area. Cut and Fill Area This area found east of the current park entrance at Traprock Street is nearly level to gently sloping (0-2% and 2-6% slopes) and is excessively drained with rapid permeability. The soil located here varies in gravel content over short distances and the horizons do not appear to be in any discernible order or very developed. NaturaI fertility is Iow at this area due to the high graveI content. The chief Iimitations for establishing vegetatiOn is the low available water capacity and the hazards of soil blowing and 9