MEMBERS: A.S.F.E. American Concrete Institute American Society for Testing and Materials Florida Institute of Consulting Engineers SUBSURFACE SOIL EXPLORATION DRAINAGE IMPROVEMENTS TO THE FOUR CORNERS MSBU HENDRY COUNTY, FLORIDA Ardaman & Associates, Inc. Geotechnical, Environmental and Materials Consultants OFFICES Orlando, 8008 S. Orange Avenue, Orlando, Florida 32809, Phone (407) 855-3860 Bartow, 1525 Centennial Drive, Bartow, Florida 33830, Phone (863) 533-0858 Cocoa, 1300 N. Cocoa Blvd., Cocoa, Florida 32922, Phone (321) 632-2503 Fort Myers, 9970 Bavaria Road, Fort Myers, Florida 33913, Phone (239) 768-6600 Miami, 2608 W. 84 th Street, Hialeah, Florida 33016, Phone (305) 825-2683 Port St. Lucie, 460 Concourse Place NW, Unit 1, Port St. Lucie, Florida 34986, Phone (772) 878-0072 Sarasota, 78 Sarasota Center Blvd., Sarasota, Florida, Phone (941) 922-3526 Tallahassee, 3175 West Tharpe Street, Tallahassee, Florida 32303, Phone (850) 576-6131 Tampa, 3925 Coconut Palm Drive, Suite 115, Tampa, Florida 33619, Phone (813) 620-3389 West Palm Beach, 2200 N. FL Mango Rd., Ste. 101, West Palm Bch., FL 33409, Phone (561)687-8200
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MEMBERS: A.S.F.E.
American Concrete Institute American Society for Testing and Materials
Florida Institute of Consulting Engineers
SUBSURFACE SOIL EXPLORATION DRAINAGE IMPROVEMENTS TO THE FOUR CORNERS MSBU HENDRY COUNTY, FLORIDA
Ardaman & Associates, Inc. Geotechnical, Environmental and
Cocoa, 1300 N. Cocoa Blvd., Cocoa, Florida 32922, Phone (321) 632-2503 Fort Myers, 9970 Bavaria Road, Fort Myers, Florida 33913, Phone (239) 768-6600
Miami, 2608 W. 84th Street, Hialeah, Florida 33016, Phone (305) 825-2683 Port St. Lucie, 460 Concourse Place NW, Unit 1, Port St. Lucie, Florida 34986, Phone (772) 878-0072
West Palm Beach, 2200 N. FL Mango Rd., Ste. 101, West Palm Bch., FL 33409, Phone (561)687-8200
Ardaman & Associates, Inc. Geotechnical, Environmental and Materials Consultants
9970 Bavaria Road, Fort Myers, Florida 33913 Phone (239) 768-6600 FAX (239) 768-0409 Florida: Bartow, Fort Myers, Miami, Orlando, Port St. Lucie, Sarasota, Tallahassee, Tampa, West Palm Beach
Louisiana: Alexandria, Baton Rouge, Monroe, New Orleans, Shreveport
Ardaman Project No. 12-33-4556 14-JUN-2013 AIM Engineering & Surveying, Inc. 5300 Lee Boulevard Lehigh Acres, FL 33971 Attention: Mr. Lee Flynn, P.E. SUBJECT: Subsurface Soil Exploration Drainage Improvements to the Four Corners MSBU Hendry County, Florida Gentlemen: As requested by AIM Engineering & Surveying, Inc. and authorized by Hendry County, Ardaman & Associates, Inc. (Ardaman) has performed the subsurface soil exploration for the project known as Drainage Improvements to the Four Corner MSBU in Hendry County, Florida. This report documents the results of our subsurface field exploration and laboratory testing programs within the Four Corners MSBU study area. This report has been prepared in accordance with generally accepted geotechnical engineering practices for specific application to the study area indicated in this report. No other warranty, expressed or implied, is made.
PROJECT DESCRIPTION AND LOCATION
The project will include improvements to the existing conveyance ditch from the Four Corners south along the county line between Hendry and Lee to S.R. 78 — a distance of approximately 16,000 feet. The ditch exists within a 330-foot swath of land abutting the Hendry/Lee County line. Improvements to the ditch will include widening and deepening as well as two new weir structures. This report summarizes the Subsurface Soil Exploration program for the ditch improvements. Information about the proposed weirs is not included. An aerial photograph of the ditch from S.R. 78 north to the Four Corners is presented as Figure 1.
Report of Subsurface Soil Exploration 14-JUN-2013 Drainage Improvements to the Four Corners MSBU Project No.12-33-4556 Hendry County, Florida Page No. 2
Ardaman & Associates, Inc.
SCOPE OF GEOTECHNICAL SERVICES The scope of geotechnical services for the Drainage Improvements to the Four Corners MSBU project was outlined in a proposal to AIM Engineering & Surveying, Inc. dated July 20, 2012. The key tasks performed for this project are itemized below. 1. Conducted 32 Standard Penetration Test (SPT) borings on approximately 500-foot centers adjacent to
the existing drainage ditch to determine the nature of the subsurface soils and groundwater conditions. 2. Reviewed each soil sample obtained from the test borings in our laboratory for further identification and
classification. 3. Prepared this report to document the results of our field exploration and laboratory testing programs. It is the intent of this report to present general information about subsurface soil and groundwater conditions in the project study area as disclosed by the test borings to the design engineers and to interested bidders on this project. FIELD EXPLORATION PROGRAM A total of 32 SPT borings were performed. The borings were labeled SPT-1 through SPT-32. The SPT borings were drilled to a depth of 15 feet. The SPT borings were conducted using methods consistent with ASTM D 1586-Standard Method for Penetration Test and Split-Barrel Sampling of Soil. The equipment and procedures used in the SPT borings are described in detail in the Appendix. The locations of the borings are shown on the attached Figure 1–Boring Location Plan which is a copy of an aerial photo of the study area obtained from the Lee County Property Appraiser’s website. The borings were not located horizontally or vertically by survey. GPS coordinates from a hand-held unit are recorded on each boring log. Note that borings SPT-1 through SPT-24 were accessed from the east side of the ditch in Hendry County through land that is mostly cattle pasture. However, north of boring SPT-24, heavy vegetation precluded further drill rig access requiring the remaining borings SPT-25 through SPT-32 to be accessed through the orange grove on the west side of the ditch in Lee County.
Report of Subsurface Soil Exploration 14-JUN-2013 Drainage Improvements to the Four Corners MSBU Project No.12-33-4556 Hendry County, Florida Page No. 3
Ardaman & Associates, Inc.
LABORATORY TESTING PROGRAM Representative soil samples obtained during our field sampling operation were packaged and transferred to our office and, thereafter, examined by a geotechnical engineer to obtain more accurate descriptions of the existing soil strata. Laboratory testing was performed on selected samples as deemed necessary to aid in soil classification and to further define the engineering properties of the soils. The laboratory tests included Natural Moisture Content, Percent Finer than the U.S. No. 200 Sieve (percent silt and clay) and Sieve Analysis. The test results are presented on the attached soil boring logs at the depths from which the samples were recovered. The results of sieve analysis are presented on Grain-Size Distribution Sheets included in the Appendix. The soil descriptions shown on the logs are based upon visual-manual procedures in accordance with local practice. Soil classification is in general accordance with the Unified Soil Classification System (ASTM D-2487) and is also based on visual-manual procedures.
SUBSURFACE SOIL/ROCK CHARACTERIZATION The general subsurface soil conditions encountered in the SPT borings are presented on the attached soil boring logs. Soil stratification is based on visual examination of recovered soil samples and interpretation of the field boring logs. The stratification lines represent the approximate boundaries between the soil types, the actual transitions may be gradual. Because of the large study area, only broad generalities may be stated about subsurface conditions. The reader is encouraged to review the boring logs to become familiar with soil and rock types anticipated in the project area. The following soil and rock strata were identified in the test borings.
Report of Subsurface Soil Exploration 14-JUN-2013 Drainage Improvements to the Four Corners MSBU Project No.12-33-4556 Hendry County, Florida Page No. 4
Ardaman & Associates, Inc.
Unified Soil Classification Soil/Rock Description Poorly Graded Sand (SP) fine sand with variable gravel content
Poorly Graded Sand with Silt (SP-SM) slightly silty fine sand with variable gravel content
Silty Sand (SM) silty fine sand (typically calcareous) with variable gravel content
Silty Clayey Sand (SC-SM) silty clayey fine sand
Clayey Sand (SC) clayey fine sand
Sandy Silt (ML) fine sandy silt (typically calcareous)
Sandy Lean Clay (CL) sandy clay, medium plasticity
N/A Soft Weathered Limestone
N/A Hard Weathered Limestone
Following are typical uses of the soil and rock strata as construction materials. Poorly Graded Sand (SP) Poorly Graded Sand with Silt (SP-SM) These sands contain less than 12 percent non-plastic silty and may contain up to 15 percent gravel (shell and limerock). Therefore, they are considered Select and suitable for use as structural fill. They are also suitable for use as fill for roadway embankments and subgrades and as general landscaping fill and berms. Drainage or permeability characteristics of these materials are good. Sands excavated below the water table should be stockpiled to drain excess moisture.
Report of Subsurface Soil Exploration 14-JUN-2013 Drainage Improvements to the Four Corners MSBU Project No.12-33-4556 Hendry County, Florida Page No. 5
Ardaman & Associates, Inc.
Silty Sand (SM) Silty Clayey Sand (SC-SM) Clayey Sand (SC) These sands may contain up to 35 percent non-plastic silty or clayey fines. These soils are generally not suitable for reuse as structural fill and as fill for embankments; however, with careful control of the moisture content required compaction may be achieved allowing use of these soil types in roadway embankments or berms. Sandy Silt (ML) Sandy Lean Clay (CL) These sandy silts and sandy clays are generally not suitable for reuse as structural fill due to their high fines content. However, they may be used as embankment fill for roadways if placed at depths of 18 inches or more below the base course and above the water level existing at the time of construction. These materials retain excess moisture and will be very difficult to dry and compact. Drainage or permeability characteristics of these materials are typically very poor because of excessive silty or clayey fines. Soft Weathered Limestone Hard Weathered Limestone Limestone rock is defined as hard if the Standard Penetration Test (SPT) N-Value is greater than 50 blows for 6 inches or less of penetration. Hard Weathered Limestone was encountered in 8 of the 32 borings at varying depths within the profile. The hardness of the limestone rock will be variable in the project study area with the degree of cementation that occurred in its formation or the degree of weathering that occurred since. Soft Weathered Limestone occurs in the project study area also, which could also be described as a weakly cemented gravelly slightly silty fine sand soil. Boulder-size fragments should be anticipated within the Soft Weathered Limestone. Use of rock as a fill material may require further processing by crushing and sieving to reduce particle sizes to mostly sand and gravel-size. The soil and rock information submitted herein is based on the data obtained from the test borings
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ATTACHMENTS • FIGURE 1 – BORING LOCATION PLAN • SPT BORING LOGS – SPT-1 THROUGH SPT-32
Drawn By: Checked By: Date:
File No. Approved By: Figure No.GDES FEB 2013
1
Ardaman & Associates, Inc.Geotechnical, Environmental and Materials Consultants
Gary Drew, P.E.12-33-4556
HENDRY COUNTYCOUNTY LINE DITCH IMPROVEMENTS
FOUR CORNERS MSBUNORTH OF S.R. 78
= SPT BORING LOCATIONFIGURE 1 BORING LOCATION PLAN
SOURCE: COPY OF 2012 AERIAL PHOTOGRAPH FROM THE LEE COUNTYPROPERTY APPRAISER’S WEBSITE
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SPT-1
SPT-2
SPT-3
SPT-4
SPT-5
SPT-6
SPT-7
SPT-8
SPT-9
SPT-10
SPT-11
SPT-12
SPT-13
SPT-14
SPT-15
SPT-16
SPT-17
SPT-18
SPT-19
SPT-20
SPT-21
SPT-22
SPT-23
SPT-24
SPT-25
SPT-26
SPT-27
SPT-28
SPT-29
SPT-30
SPT-31
SPT-32
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6
9
12
15
18
21
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2- 2- 3
3- 2- 3
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1- 1- 1
1- 2- 1
2- 1- 2
4
5
5
2
3
2
3
3
1
2
3
4
5
6
SP
SC
SC-SM
CL
SM
Poorly Graded Sand - Gray fine sand.
Clayey Sand - Brown clayey fine sand.
Silty Clayey Sand - Light brown silty clayey finesand, trace of shell fragments.