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I I I I I I I I I I I I I I I I I I I acquired a 20-feet pedestrian easement that will be used to access the new crossmg. 2.5. Land Usage The area is used by high occupancy residential condominium, small businesses and a public recreational area including a community part t at the East end of the canal. .1 2.6. Geotechnical We have reviewed the Miami-Dade County Soil Survey Map to obtain soil information regarding the subject site. The Soil Survey of Miami-Dade County, Florida, as prepared by the U.S. Department of Agriculture, Soil Conservation Service (later renamed the Natural Resource Conservation Service), dated December 1947, identifies two different types of soils were encountered at the site. On the North side of the canal, the Soil Survey indicates that the predominant soils are Mangrove swamp (unclassified soils). This land type is mapped in the coastal areas of the county. Generally it supports a thick growth of mangrove trees. Small areas of salt- tolerant grasses, or tidal marshes, occur in the areas of mangrove trees. This land is frequently inundated by salt water. The soil material is sand, marl, or peat, or a mixture of these. However, on the south side of the canal the predominant soils are classified as Made Land. This land type was built up from the bay bottoms in the vicinity of Miami and Miami Beach. Made Land is used mainly as building sites for homes, hotels and business establishments. In addition, we have reviewed subsurface information from sites near the subject site. Based on our reviewed, we anticipate the following generalized subsurface conditions: Artificial fill: A stratum of artificial fill is anticipated at the surface. The fill may be composed of silty sand with varying proportions of limerock fragments and may range in thickness between 5 and 7 feet. Construction debris in the form of concrete rubble, plastic, steel and wood may exist within the fill. Mangrove Deposits: Very soft organic silt or fibrous peat is anticipated beneath the artificial fill. This organic material is expected to be highly compressible, with high moisture and organic contents, and erratic in thickness at both sides of the canal, however, thickness within sites near the project site varied from 5 to 7 feet. Silty and Sandy Limestone - Weakly to moderately well cemented silty and sandy limestone formation is expected below the mangrove deposits. Based on our review, this formation can be found up to depths of about 40 to 50 feet, however, it may extend deeper. Interbedded fine sands are expected within the T:IMARKETINGIPROPOSALSIMARKETING.0710724 pedestrian bridgelDoclPedestrian Bridge and boardwalk.doc Page 3 of 8