FIGURE 10

Geotechnical Investigation Gilley Creek Hydrologic Restoration Manatee County, Florida Page 2 Scope of Work In order to address the above objectives, our scope of work for this project included the following:

1. Reviewed available published information on the site, including the United States Department of Agriculture (USDA), Soil Conservation Service (SCS) soil survey data for Manatee County and the United States Geological Survey (USGS) topographic maps.

2. Conducted a subsurface exploration program consisting of ten (10) auger borings

to evaluate the shallow soils and groundwater conditions. The borings were conducted to depths of approximately 6 feet below land surface (bls).

3. Measured the depth of the shallow groundwater table at the boring locations.

4. Reviewed and visually classified the recovered soils in the laboratory using the

Unified Soils Classification System. Developed the general soil stratigraphy at the boring locations.

5. Prepared a geotechnical engineering report which summarizes the course of our

study, the field and laboratory data generated, the subsurface conditions encountered, and our geotechnical engineering evaluations related to the proposed project.

Existing Site Conditions The site consists of pasture, overgrown flatlands and drainage canals with adjacent spoil piles. The site is bordered to the south by Oak Knoll Road and to the east by Gilley Creek. The USGS topographic survey was reviewed for the site. The site is found on the Quadrangle map entitled ARye, Fla.@. From this review, the natural ground surface elevation for the site ranges from approximately +75 to +85 feet National Geodetic Vertical Datum of 1929. Subsurface Soil Conditions According to the U.S.D.A. ASoil Survey of Manatee County@, the soils within the study area are classified as Myakka fine sand and Floridana-Immokalee-Okeelanta type soils. Myakka fine sand consists of nearly level, poorly drained sandy soils. Floridana-Immokalee-Okeelanta type soils consist of nearly level, poorly to very poorly drained sandy soils. The natural seasonal high water table in both soil types is generally at a depth of less than 10 inches.

Geotechnical Investigation Gilley Creek Hydrologic Restoration Manatee County, Florida Page 3 Field Exploration Program Ten (10) auger borings (ECR-1 through ECR-10) were conducted to depths of 6 feet bls at locations selected by King Engineering Associates (KEA). The borings were approximately located in the field according to the GPS coordinates provided. Boring locations ECR-1 through ECR-7 correspond to the spoil piles located adjacent to the drainage canals. Boring locations ECR-8 through ECR-10 were located at natural ground surface. The approximate locations of the borings are shown on Figure 1. The recovered soil samples were visually classified in the field, and representative samples were placed in jars and transported to our office for further review and confirmation of the field classification. Generalized Soil Stratigraphy The results of the subsurface exploration program including the soil stratification in profile form and some pertinent exploration information such as groundwater level are included on Figure 2. Soil stratification was based on the review of recovered soil samples and interpretation of the field boring logs by a geotechnical engineer. The stratification lines represent the approximate boundaries between soil types; the actual transition may be gradual. The soil strata were visually classified using the Unified Soils Classification System. Minor variations in soil types not considered important to our engineering evaluations may have been abbreviated or omitted for clarity. Auger borings ECR-1 through ECR-10 encountered fine sands, slightly silty fine sands and slightly silty fine sands with traces of clay to depths of approximately 6 feet. The shallow groundwater was encountered at depths of 2.2 to 5.8 feet bls in the borings conducted. The shallow groundwater level should be expected to vary during wet seasons and heavy rainfall events. Recommendations In general, the shallow soils encountered over were granular type soils with a low percentage of fines. These materials are easily compacted in a dry state and should be suitable for the creation of ditch blocks with side slopes not exceeding 3:1. It is recommended that the deposited soils located above the water table be placed in 12 inch lifts and be compacted using appropriate compaction equipment capable of achieving a minimum of 95 percent of the modified Proctor (A.A.S.H.T.O. T-180) value of soil.

FIGURES