TIERRA SOUTH FLORIDA, INC. Geotechnical Engineering / Material Testing / Inspection Services

Transcription

1 TIERRA SOUTH FLORIDA, INC. Geotechnical Engineering / Material Testing / Inspection Services March 11, 2016 Kimley-Horn 1920 Wekiva Way Suite 200 West Palm Beach, Fl Attn: Matthew B. Fursetzer, P.E. RE: Preliminary Geotechnical Report for Field Exfiltration Test SR-A1A North Bridge Over ICWW St. Lucie County, Florida FPID No TSF Project No.: Dear Matthew: Tierra South Florida, Inc. (TSF) has completed a preliminary geotechnical study for Field Exfiltration Tests for the subject project. The study was performed in general accordance with FDOT procedures. The results of the Field Exfiltration Tests are presented in this report. 1.0 PROJECT DESCRIPTION The project, as we understand it, is a PD&E study to evaluate bridge replacement alternatives of the Ft. Pierce North Causeway Bridge (FDOT Bridge No ) in St. Lucie County, Florida. The project also includes improvements/reconstructions of the roadways that connect to the subject bridge. The purpose of this study was to provide preliminary geotechnical input to the design team to assist in evaluation of the merits of the potential roadway improvements. 2.0 SCOPE OF SERVICES The study was performed to obtain information on the existing subsurface conditions along the project corridor to assist in the design and preparation of construction plans for the proposed improvements. The following services were provided: 1. Reviewed readily available published topographic and soils information. This information was obtained from the Soil Survey of St. Lucie County, Florida published by the United States Department of Agriculture (USDA) Natural Resources Conservation Services (NRCS), and USGS Maps. 2. Performed a Geotechnical field study which included hand auger borings to identify the soil mottling depths for seasonal high ground water table determination VISTA PARKWAY, SUITE 10; WEST PALM BEACH, FLORIDA (561) ; FAX (561) State of Florida Professional Engineers License #28073

2 Preliminary Geotechnical Report for Field Exfiltration Test 2 SR-A1A North Bridge Over ICWW St. Lucie County, Florida FPID No TSF Project No.: Prepared this preliminary geotechnical engineering report. These Geotechnical Services were performed in general accordance with FDOT Standards Soils and Foundations Handbook. 3.0 RESULTS OF FIELD EXFILTRATION TESTS 3.1 Review of USDA Soil Survey, St. Lucie County Area, Florida Based on a review of the St. Lucie County Area Soil Survey, the project location was mapped as follows: Arents, 0 to 5 percent slopes Arents, organic substratum Canaveral fine sand, 0 to 5 percent slopes Electra fine sand, 0 to 5 percent slopes Nettles and Oldsmar sands Palm Beach fine sand, 0 to 5 percent slopes Paola sand, 0 to 5 percent slopes Kesson-Terra Ceia complex, tidal St. Lucie sand, 0 to 8 percent slopes Urban land Water Waters of the Atlantic Ocean The Site Vicinity Map and a USDA soil survey map are presented in Appendix. 3.2 Field Exfiltration tests Exfiltration tests were performed at six (6) locations using the South Florida Water Management District (SFWMD) usual open-hole, constant head methodology. Approximate test locations are shown in the attachment. The test was performed to depths of 10 and 15 feet below existing grades. The holes were drilled by a hollow stem auger (about 6 inches in diameter) so that soil samples could be retrieved for a visual classification by our engineers. The borings were completed as open well. Water from the drill rig tank was then pumped into the open wells, and the amount of water required maintaining constant head was recorded. Exfiltration test results are included in the attachment.

3 Preliminary Geotechnical Report for Field Exfiltration Test 3 SR-A1A North Bridge Over ICWW St. Lucie County, Florida FPID No TSF Project No.: Groundwater 4.0 GROUNDWATER CONDITIONS Encountered groundwater depth was measured at the boring locations following termination of drilling for the exfiltration tests. The existing grade at the test location varies from place to place. The groundwater table measured in the borings ranged from about 2.0 to 14.5 feet below the existing grade. Encountered groundwater depths measured in the boring are presented in the Table of Exfiltration test results in Appendix. Groundwater conditions will vary with environmental variations and seasonal conditions, such as the frequency and magnitude of rainfall patterns, as well as man-made influences (i.e. existing canals, swells, drainage ponds, under drains, and areas of covered soils, like paved parking lots and sidewalks). Fluctuation should be anticipated. We recommend that the contractor determine the actual groundwater levels at the time of construction to determine groundwater impact on his construction procedure. 4.2 Seasonal High Groundwater Table (SHGWT) Estimates Seasonal high groundwater levels are expected to be controlled by existing drainage features present in the project vicinity. Based on USGS water resources data, and our past experience with similar soils, estimated seasonal high groundwater table is expected to be at Elevation 1.0 to 2.0 feet, NAVD The SHGWT estimate will need to be further evaluated after a fully-fledged geotechnical study for the project. 5.0 REPORT LIMITATIONS Our Geotechnical engineering evaluation of the site and subsurface conditions with respect to the planned roadway improvements and our recommendations for site preparation and foundation construction are based upon the followings: (1) site observations, (2) the field exploratory test data obtained during the geotechnical study, and (3) our understanding of the project information and anticipated final grades as presented in this report. If the final grades vary considerably from those stated, or when final cross-sectional data becomes available, please contact our offices so that we can review our recommendations. Furthermore, upon the discovery of any site or subsurface conditions during construction, which appears to deviate from the data obtained during this Geotechnical exploration, please contact us immediately so that we may visit the site, observe the differing conditions, and evaluate the new information with regards to our evaluation and recommendations contained herein. The recommendations presented previously represent design and construction techniques that we feel are both applicable and feasible for the planned construction. We recommend, however, that we

4 Preliminary Geotechnical Report for Field Exfiltration Test 4 SR-A1A North Bridge Over ICWW St. Lucie County, Florida FPID No TSF Project No.: be provided the opportunity to review the final construction plans and the earthwork/roadway embankment construction specifications to evaluate whether our recommendations have been properly interpreted and implemented. 6.0 CLOSURE We appreciate the opportunity to perform this Preliminary Geotechnical Study and look forward to continued participation in this project. If you have any questions pertaining to this report, or as we may be of further service, please contact our office. Respectfully submitted, TIERRA SOUTH FLORIDA, INC. Wenbin Zhao, Ph.D., P.E. Ramakumar Vedula, P.E. Geotechnical Engineer Principal Engineer FL Registration No FL Registration No Appendix: Vicinity Map USDA Soil Survey Map Exfiltration Test Locations Plan Field Exfiltration Test Results

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6 ' 40'' W 80 20' 24'' W Soil Map St. Lucie County, Florida (SR-A1A NORTH BRIDGE OVER ICWW BRIDGE) ' 44'' N ' 44'' N 27 27' 53'' N 27 27' 53'' N Map Scale: 1:7,690 if printed on B landscape (17" x 11") sheet. N Meters 600 Feet Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS Natural Resources Conservation Service ' 40'' W 80 20' 24'' W Web Soil Survey National Cooperative Soil Survey 3/8/2016 Page 1 of 3

7 Soil Map St. Lucie County, Florida (SR-A1A NORTH BRIDGE OVER ICWW BRIDGE) MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: St. Lucie County, Florida Survey Area Data: Version 8, Nov 19, 2015 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: 13, 2011 Dec 15, 2010 Mar The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/8/2016 Page 2 of 3

8 Soil Map St. Lucie County, Florida SR-A1A NORTH BRIDGE OVER ICWW BRIDGE Map Unit Legend St. Lucie County, Florida (FL111) Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 4 Arents, 0 to 5 percent slopes % 6 Arents, organic substratum % 10 Canaveral fine sand, 0 to 5 percent slopes 12 Electra fine sand, 0 to 5 percent slopes % % 25 Nettles and Oldsmar sands % 27 Palm Beach fine sand, 0 to 5 percent slopes 28 Paola sand, 0 to 5 percent slopes 35 Kesson-Terra Ceia complex, tidal 42 St. Lucie sand, 0 to 8 percent slopes % % % % 47 Urban land % 99 Water % 100 Waters of the Atlantic Ocean % Totals for Area of Interest % Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 3/8/2016 Page 3 of 3

9 St. Lucie County, Florida 4 Arents, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 1jptx Elevation: 10 to 20 feet Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Arents and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Arents Setting Landform: Rises on marine terraces Landform position (three-dimensional): Rise Parent material: Altered marine deposits Typical profile C1-0 to 10 inches: sand C2-10 to 51 inches: sand A/Eb - 51 to 80 inches: sand Properties and qualities Slope: 0 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): High to very high (5.95 to in/hr) Depth to water table: About 18 to 36 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very low (about 3.0 inches) Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Minor Components Sanitary landfill Percent of map unit: 5 percent 12

10 Canaveral Percent of map unit: 5 percent Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve 6 Arents, organic substratum Map Unit Setting National map unit symbol: 1jptz Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Arents, organic substratum and similar soils: 95 percent Minor components: 5 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Arents, Organic Substratum Setting Landform: Rises on marine terraces Landform position (three-dimensional): Rise Parent material: Sandy dredge spoils over organic material over sandy marine deposits Typical profile C1-0 to 6 inches: sand C2-6 to 38 inches: sand Oa - 38 to 52 inches: muck A/Eb - 52 to 80 inches: sand Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): High to very high (5.95 to in/hr) Depth to water table: About 24 to 36 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) 13

11 Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Moderate (about 8.3 inches) Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Minor Components Arents Percent of map unit: 5 percent Landform: Rises on marine terraces Landform position (three-dimensional): Rise 10 Canaveral fine sand, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 1jpv3 Elevation: 10 to 100 feet Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Canaveral and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Canaveral Setting Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve Parent material: Sandy marine deposits Typical profile A - 0 to 6 inches: fine sand C - 6 to 80 inches: fine sand Properties and qualities Slope: 0 to 5 percent 14

12 Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Very high (19.98 to in/hr) Depth to water table: About 12 to 36 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 6.0 Available water storage in profile: Very low (about 1.9 inches) Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A/D Minor Components Palm beach Percent of map unit: 5 percent Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve Other vegetative classification: Sandy soils on ridges and dunes of xeric uplands (G156BC111FL) Myakka Percent of map unit: 5 percent Landform: Flats on marine terraces Landform position (three-dimensional): Talf Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) Pompano Percent of map unit: 5 percent Landform: Drainageways on marine terraces, flats on marine terraces Landform position (three-dimensional): Dip Down-slope shape: Linear Across-slope shape: Concave Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) 15

13 12 Electra fine sand, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 1jpv5 Elevation: 20 to 200 feet Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Electra and similar soils: 88 percent Minor components: 12 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Electra Setting Landform: Knolls on marine terraces, rises on marine terraces Landform position (three-dimensional): Interfluve Parent material: Sandy and loamy marine deposits Typical profile A - 0 to 7 inches: fine sand E - 7 to 47 inches: fine sand Bh - 47 to 60 inches: fine sand Btg - 60 to 80 inches: fine sandy loam Properties and qualities Slope: 0 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Somewhat poorly drained Runoff class: Low Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: About 24 to 42 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Low (about 4.2 inches) Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Other vegetative classification: Sandy soils on rises and knolls of mesic uplands (G156BC131FL) 16

14 Minor Components Ankona Percent of map unit: 3 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) Hobe Percent of map unit: 3 percent Landform: Knolls on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve Other vegetative classification: Sandy soils on rises, knolls, and ridges of mesic uplands (G156BC121FL) Pendarvis Percent of map unit: 3 percent Landform: Knolls on marine terraces, rises on marine terraces Landform position (three-dimensional): Interfluve Other vegetative classification: Sandy soils on rises and knolls of mesic uplands (G156BC131FL) Jonathan Percent of map unit: 3 percent Landform: Knolls on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve Other vegetative classification: Sandy soils on rises, knolls, and ridges of mesic uplands (G156BC121FL) 25 Nettles and Oldsmar sands Map Unit Setting National map unit symbol: 1jpvl Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Farmland of unique importance Map Unit Composition Oldsmar and similar soils: 40 percent Nettles and similar soils: 40 percent 17

15 Minor components: 20 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Nettles Setting Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear Parent material: Sandy and loamy marine deposits Typical profile A - 0 to 8 inches: sand E - 8 to 33 inches: sand Bh1-33 to 39 inches: sand Bh2-39 to 55 inches: sand Btg - 55 to 80 inches: fine sandy loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: 31 to 50 inches to ortstein Natural drainage class: Poorly drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: About 6 to 18 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very low (about 1.6 inches) Land capability classification (nonirrigated): 4w Hydrologic Soil Group: C/D Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) Description of Oldsmar Setting Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Parent material: Sandy and loamy marine deposits Typical profile A - 0 to 5 inches: sand E - 5 to 32 inches: sand Bh - 32 to 42 inches: sand Btg - 42 to 80 inches: fine sandy loam Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches 18

16 Natural drainage class: Poorly drained Runoff class: High Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table: About 6 to 18 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Low (about 4.9 inches) Land capability classification (nonirrigated): 4w Hydrologic Soil Group: A/D Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) Minor Components Pineda Percent of map unit: 4 percent Landform: Drainageways on marine terraces, flats on marine terraces Landform position (three-dimensional): Dip Down-slope shape: Linear Across-slope shape: Concave Other vegetative classification: Sandy over loamy soils on flats of hydric or mesic lowlands (G156BC241FL) Pepper Percent of map unit: 4 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) Oldsmar Percent of map unit: 4 percent Landform: Depressions on marine terraces Landform position (three-dimensional): Dip Down-slope shape: Concave Across-slope shape: Concave Other vegetative classification: Sandy soils on stream terraces, flood plains, or in depressions (G156BC145FL) Wabasso Percent of map unit: 4 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) 19

17 Ankona Percent of map unit: 4 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) 27 Palm Beach fine sand, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 1jpvn Elevation: 10 to 20 feet Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Palm beach and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Palm Beach Setting Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve Parent material: Shells and sandy marine deposits Typical profile A - 0 to 8 inches: fine sand C - 8 to 80 inches: fine sand Properties and qualities Slope: 0 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): Very high (19.98 to in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Calcium carbonate, maximum in profile: 25 percent Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) 20

18 Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very low (about 2.4 inches) Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Other vegetative classification: Sandy soils on ridges and dunes of xeric uplands (G156BC111FL) Minor Components Canaveral Percent of map unit: 10 percent Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve 28 Paola sand, 0 to 5 percent slopes Map Unit Setting National map unit symbol: 2tzwj Elevation: 0 to 100 feet Mean annual precipitation: 44 to 60 inches Mean annual air temperature: 68 to 77 degrees F Frost-free period: 340 to 365 days Farmland classification: Not prime farmland Map Unit Composition Paola and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Paola Setting Landform: Ridges on marine terraces, hills on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Parent material: Sandy marine deposits Typical profile A - 0 to 6 inches: sand E - 6 to 55 inches: sand B/E - 55 to 80 inches: sand 21

19 Properties and qualities Slope: 0 to 5 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): Very high (19.98 to in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very low (about 2.5 inches) Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on ridges and dunes of xeric uplands (G155XB111FL) Minor Components Apopka Percent of map unit: 6 percent Landform: Ridges on marine terraces, hills on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Other vegetative classification: Longleaf Pine-Turkey Oak Hills (R154XY002FL), Sandy soils on ridges and dunes of xeric uplands (G154XB111FL) Astatula Percent of map unit: 5 percent Landform: Ridges on marine terraces, hills on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Other vegetative classification: Sandy soils on ridges and dunes of xeric uplands (G155XB111FL) Pomello Percent of map unit: 4 percent Landform: Ridges on marine terraces, hills on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Ecological site: Sand Pine Scrub (R155XY001FL) Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) 22

20 35 Kesson-Terra Ceia complex, tidal Map Unit Setting National map unit symbol: 1jpvx Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Kesson, tidal, and similar soils: 55 percent Terra ceia, tidal, and similar soils: 40 percent Minor components: 5 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Kesson, Tidal Setting Landform: Tidal marshes on marine terraces Landform position (three-dimensional): Interfluve, talf Down-slope shape: Linear Parent material: Sandy marine deposits with shells Typical profile A - 0 to 6 inches: sand C1-6 to 23 inches: sand C2-23 to 38 inches: sand C3-38 to 80 inches: sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Very poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): High to very high (1.98 to in/hr) Depth to water table: About 0 inches Frequency of flooding: Very frequent Frequency of ponding: None Calcium carbonate, maximum in profile: 15 percent Salinity, maximum in profile: Strongly saline (16.0 to 32.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 30.0 Available water storage in profile: Low (about 5.8 inches) Land capability classification (nonirrigated): 8 Hydrologic Soil Group: A/D 23

21 Description of Terra Ceia, Tidal Setting Landform: Tidal marshes on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear Parent material: Herbaceous organic material Typical profile Oa - 0 to 38 inches: muck C - 38 to 80 inches: sand Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Very poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): High to very high (5.95 to in/hr) Depth to water table: About 0 inches Frequency of flooding: Very frequent Frequency of ponding: None Salinity, maximum in profile: Slightly saline to moderately saline (4.0 to 8.0 mmhos/ cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very high (about 14.3 inches) Land capability classification (nonirrigated): 8 Hydrologic Soil Group: A/D Minor Components Mckee, tidal Percent of map unit: 5 percent Landform: Tidal marshes on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear 24

22 42 St. Lucie sand, 0 to 8 percent slopes Map Unit Setting National map unit symbol: 2tzwp Elevation: 0 to 70 feet Mean annual precipitation: 49 to 60 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition St. lucie and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of St. Lucie Setting Landform: Dunes on marine terraces, knolls on marine terraces, ridges on marine terraces Landform position (two-dimensional): Backslope, summit Landform position (three-dimensional): Side slope, interfluve, riser Parent material: Eolian or sandy marine deposits Typical profile A - 0 to 6 inches: sand C - 6 to 80 inches: sand Properties and qualities Slope: 0 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): Very high (19.98 to in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very low (about 2.4 inches) Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A 25

23 Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on ridges and dunes of xeric uplands (G155XB111FL) Minor Components Paola Percent of map unit: 5 percent Landform: Dunes on marine terraces, knolls on marine terraces, ridges on marine terraces Landform position (two-dimensional): Backslope, summit Landform position (three-dimensional): Side slope, interfluve, riser Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on ridges and dunes of xeric uplands (G155XB111FL) Pomello Percent of map unit: 3 percent Landform: Dunes on marine terraces, knolls on marine terraces, ridges on marine terraces Landform position (two-dimensional): Backslope, summit Landform position (three-dimensional): Side slope, interfluve, riser Ecological site: Sand Pine Scrub (R155XY001FL) Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) Satellite Percent of map unit: 2 percent Landform: Dunes on marine terraces, knolls on marine terraces, ridges on marine terraces Landform position (two-dimensional): Backslope, summit Landform position (three-dimensional): Side slope, interfluve, riser Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) 47 Urban land Map Unit Setting National map unit symbol: 1jpw9 Mean annual precipitation: 49 to 58 inches Mean annual air temperature: 70 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland Map Unit Composition Urban land: 90 percent 26

24 Paola and similar soils: 1 percent Minor components: 9 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Urban Land Setting Landform: Marine terraces Landform position (three-dimensional): Interfluve, talf Down-slope shape: Linear Parent material: No parent material Description of Paola Setting Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Interfluve, side slope Parent material: Sandy marine deposits Typical profile A - 0 to 6 inches: sand E - 6 to 55 inches: sand B/C - 55 to 80 inches: sand Properties and qualities Slope: 0 to 8 percent Depth to restrictive feature: More than 80 inches Natural drainage class: Excessively drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): Very high (19.98 to in/hr) Depth to water table: More than 80 inches Frequency of flooding: None Frequency of ponding: None Salinity, maximum in profile: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum in profile: 4.0 Available water storage in profile: Very low (about 1.9 inches) Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Minor Components Nettles Percent of map unit: 2 percent Landform: Flats on marine terraces 27

25 Landform position (three-dimensional): Talf Down-slope shape: Linear Ankona Percent of map unit: 2 percent Landform: Flats on marine terraces Landform position (three-dimensional): Talf Waveland Percent of map unit: 1 percent Landform: Flats on marine terraces Landform position (three-dimensional): Talf St. lucie Percent of map unit: 1 percent Landform: Dunes on marine terraces, ridges on marine terraces Landform position (three-dimensional): Side slope, interfluve Tantile Percent of map unit: 1 percent Landform: Flats on marine terraces Landform position (three-dimensional): Talf Pepper Percent of map unit: 1 percent Landform: Flats on marine terraces Landform position (three-dimensional): Talf Pendarvis Percent of map unit: 1 percent Landform: Knolls on marine terraces, rises on marine terraces Landform position (three-dimensional): Interfluve 28

26 99 Water Map Unit Composition Water: 100 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Water 100 Waters of the Atlantic Ocean Map Unit Composition Waters of the atlantic ocean: 100 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Waters Of The Atlantic Ocean 29

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28 Summary of Exfiltration Test Results SR-A1A NORTH BRIDGE OVER ICWW St. Lucie County, Florida FPID No.: TSF Project No Test Date Diameter Depth of Depth to Groundwater Level Hydraulic Saturated Hole Average Location Performed Hole Casing Hole Below Ground Surface (Feet) Head, H 2 Depth, Ds Flow Rate, Q Horizontal Hydraulic Conductivity (K) (Inches) (Inches) (Feet) Prior to Test During Test (Feet) (Feet) (gpm) (ft 3 /sec/ft 2 -ft Head) (inch/hr) P-1 7/27/ E P-2 7/27/ E P-3 7/27/ E P-4 7/28/ E P-5 7/28/ E P-6 7/28/ E Note: (1) The above hydraulic conductivity values represent an ultimate value. The designer should decide on the required factor of safety (2) The hydraulic conductivity values were calculated based on the South Florida Water Management Districts's USUAL OPEN HOLE CONSTANT HEAD percolation test procedure. (3) Casing diameter was used for the calculation of hydraulic conductivity values. Page 1