Grissom-Widening-PSJ-Fay-30-PER-App4-Calc-20240118.pdf

APPENDIX FOUR:

PRELIMINARY DRAINAGE

CALCULATIONS

Pond Evaluation Report

FOR

GRISSOM PARKWAY

Prepared for:

Brevard County

PREPARED BY:

DRMP, Inc.

941 LAKE BALDWIN LANE

Orlando, Florida 32814

DRMP# 21-0700.019 August 2022

PROFESSIONAL ENGINEER CERTIFICATION

I hearby certify that I am a registered professional engineer in the State of Florida practicing engineering with DRMP, Inc. and that I have supervised the preparation of and approve the analysis, findings, opinions, conclusions and technical advice hereby reported for:

PROJECT: Grissom Parkway

Pond Evaluation Report

Brevard County, Florida

The engineering work represented by this document was performed through the following duly authorized engineering business:

941 Lake Baldwin Lane

Orlando, Florida 32814

Certificate of Authorization: 2648

Telephone: 407-896-0594

This report provides drainage analysis and design for the Grissom Parkway project by Brevard

County. I acknowledge that the procedures and references used to develop the results contained in this report are standard to the professional practice of hydrologic analysis and hydraulic engineering as applied through professional judgment experience.

Any engineering analysis, documents, conclusions or recommendations replied upon from other professional sources or provided with responsibility by the client are referenced accordingly in the following report.

Gene C. McClendon State of Florida, Professional Engineer, License No. 66603

This item has been digitally signed and sealed by Gene C. McClendon on the date adjacent to the seal.

Printed copies of this document are not considered signed and sealed and the signature must be verified on any electronic copies.

The above named professional engineer shall be responsible for this document in accordance with rule 61G15-23.004, F.A.C.

Grissom Parkway Preliminary Pond Evaluation Report

Project No. 21-0700.019 i

TABLE OF CONTENTS

TABLE OF CONTENTS ........................................................................................................ i APPENDICIES ....................................................................................................................... i

SECTION 1.0 – GENERAL INFORMATION

1.1 PROJECT LOCATION

1.2 PURPOSE

1.3 EXISTING DRAINAGE PATTERN

1.4 TAILWATER

SECTION 2.0 – PERMITTED ANALYSIS

SECTION 3.0 – MODIFIED ANALYSIS

SECTION 4.0 – CONCLUSION

SECTION 5.0 – REFERENCES

APPENDICES

Appendix A – Figures

Figure 1 – Location Map

Figure 2 – Soils Map

Figure 3 – FEMA Floodplain Map

Figure 4 – Drainage Map

Figure 5 – Datum Conversion

Appendix B – Permitted Calculations and Documentation

Appendix C – Post Development Calculations and Documentation

SECTION 1.0 – GENERAL INFORMATION

1.1 PROJECT LOCATION

The proposed project is located on Grissom Parkway, north of Brevard County from the south of Port St. John Parkway Intersection to Fay Blvd., approximate distance of 1.04 miles. The limits of the project are shown on Figure 1, Project Location Map. The project is in Sections 22, 26, 27, Township 23 South, Range 35 East.

Note: This project is based on NAVD ’88 Datum that is approximately 1.32 feet below the equivalent NGVD ’29 elevation (i.e. 18.68 NAVD ’88 = 20 NGVD ’29).

1.2 PURPOSE

The purpose of this report is to document the drainage analysis for the widening of Grissom

Parkway and analyzing the existing permitted pond sites for the additional proposed impervious areas to meet the water quantity and water quality needs. (SJRWMD ERP

Permit #16250).

1.3 EXISTING DRAINAGE PATTERN

The project is located in the Upper St. Johns River Hydrologic Basin within the jurisdiction of the St. Johns River Water Management District (SJRWMD). From south of Port St.

John Parkway Intersection to Fay Blvd, Grissom Parkway runoff sheet flows off the roadways through roadside ditches to ditch bottom inlets (DBI) and cross drains to Pond 10

& Pond 11. Pond outfalls are to canals which ultimately outfall to St. Johns River.

1.4 TAILWATER

The tailwater data used for the design and analysis of Pond 10 & Pond 11 was established by Grissom Road Project which was permitted under the SJRWMD ERP Permit # 16250.

SECTION 2.0 – PERMITTED ANALYSIS

The permitted improvements consist of a 2-lane rural roadway section with a permitted drainage system to a future 4-lane rural roadway directed to stormwater treatment facilities and a 2-lane urban roadway section with an untreated open drainage system to Canal.

Permitted Basins

Basin Pre 10 (permitted)

Permitted Basin 10 consists of the onsite area and offsite area. Permitted Basin 10 outfalls to Pond 10 via roadside ditches via storm sewer system. Pond outfalls via overland weir to canal which discharges into St. Johns River.

Basin Pre 11 (permitted)

Permitted Basin 11 consists of the onsite area and offsite area. Permitted Basin 11 outfalls to Pond 11 via roadside ditches via storm sewer system. Pond outfalls via overland weir to canal which discharges into St. Johns River.

Basin Pre Urban South

Basin Pre Urban South consists of the onsite area and residential area. Basin Pre Urban

South outfalls to canal via roadside ditches via storm sewer system which discharges into

St. Johns River.

Basin Pre Urban North

Basin Pre Urban North consists of the onsite area and residential area. Basin Pre North

South outfalls to canal via roadside ditches via storm sewer system which discharges into

St. Johns River.

SECTION 3.0 – MODIFIED ANALYSIS

The proposed modifications for Grissom Parkway consist of additional impervious to basins post 10, post 11 and post urban. The analysis consists of the water quality and quantity provided by Ponds 10 and 11 for the proposed improvements. The modifications are required due to the construction of the future 4-lane roadway and sidewalks. These modifications require additional drainage infrastructure along Grissom Parkway and extension of the canal box culvert under Grissom Parkway.

Basin Post 10

Basin 10 outfalls to Pond 10 via Grissom Parkway storm sewer system with an additional impervious area of 1.13 acres from the addition of 2-lane roadway and sidewalks. Pond 10 grading and weir will not require modifications.

Basin Post 11

Basin 11 outfalls to Pond 11 via Grissom Parkway storm sewer system with an additional impervious area of 2.81 acres from the addition of 2-lane roadway and sidewalks. Pond 11 grading and weir will require modifications due to the required treatment elevation that is

1.18 ft below the permitted treatment elevation and modify weir width to be 41 inches.

Basin Post Urban

Basin Post Urban outfalls to Pond 11 via Grissom Parkway roadside storm sewer system with an additional impervious area of 2.93 acres from the addition of the untreated 4-lane urban roadway and sidewalks. Pond 11 grading and weir will require modifications due to the required treatment elevation that is 1.18 ft below the permitted treatment elevation and modify weir width to be 41 inches.

Table 1 – Proposed Hydrologic/Hydraulic Information

Permitted Proposed Conditions

Revised Proposed Condition

Basin Basin Area (Ac)

Impervious Area (Ac)

Basin Area (Ac)

Existing Impervious

Area (Ac)

Proposed Impervious

Area (Ac)

Total Impervious

Area (Ac)

Basin Post 10 25.20 3.03 25.20 3.03 1.13 4.16

Basin Post 11 71.00 3.30 71.00 3.30 2.81 6.11

Basin Post Urban n/a n/a 18.70 1.97 2.93 4.90

Total 96.20 6.33 114.90 8.30 6.87 15.17

Table 2 – Water Quality Volumes

Proposed Conditions

Revised Proposed Condition

Pond

Treatment Volume

Required (ac-ft)

Treatment Volume

Provided (ac-ft)

Treatment Volume

Required for 0.5" over

Basin Area (ac-ft)

Treatment Volume

Required for 1.5" over

Impervious Area

(ac-ft)

Treatment Volume

Provided (ac-ft)

Difference

Pond 10 n/a 0.61 0.42 0.43 0.44 0.10

Pond 11 n/a 3.94 0.92 1.15 1.30 0.15

Table 3 – Post Development Basin Design Characteristics

25yr-24hr

Predevelopment Conditions

25yr-24hr Permitted

Proposed Conditions

25yr-24hr Revised

Predevelopment Conditions

25yr-24hr Revised

Proposed Condition

Low Edge of

Pavement Elevation

Basin Peak

Discharge (cfs)

Peak Discharge

(cfs)

Permitted Peak Stage

Peak Discharge

(cfs)

Peak Discharge

(cfs)

Peak Stage

Pond 10 13.68 12.36 23.03 13.70 12.51 23.04 26.38

Pond 11 30.30 28.63 23.33 43.30 42.91 23.27 23.26

• Revised predevelopment conditions to include basins north of Canal.

SECTION 4.0 – CONCLUSION

The analyses performed for this report for the existing permitted ponds along Grissom

Parkway indicate that both Pond 10 and Pond 11 will offer the attenuation and treatment for the additional impervious areas from the stormwater runoff. Pond 10 will not require any modifications, while pond 11 will require a modification to the outfall weir as the required treatment elevation for the pond was lowered to meet the water quantity and quality needs.

SECTION 5.0 – REFERENCES

• Florida Department of Transportation (FDOT) Drainage Manual/Handbook

• FDOT Design Manual (FDM), 2020

Appendix A

Figures

August 2022

Esri, HERE, Garmin, (c) OpenStreetMap contributors, USGS The National Map: National Boundaries Dataset, 3DEP Elevation Program, Geographic Names Information System, National Hydrography Dataset, National Land Cover Database, National Structures Dataset, and National Transportation Dataset; USGS Global Ecosystems; U.S.

Census Bureau TIGER/Line data; USFS Road Data; Natural Earth Data; U.S. Department of State Humanitarian Information Unit; and NOAA National Centers for Environmental Information, U.S. Coastal Relief Model. Data refreshed June, 2022.

Begin Project

End Project

USGS Quad Map:

Grissom Parkway Location Map

Brevard County, Florida

0 1,000 2,000500 Feet

FIGURE

P O L KP O L K

O R A N G EO R A N G E

O S C E O L AO S C E O L A

B R E V A R DB R E V A R D

S E M I N O L ES E M I N O L E

I N D I A N R I V E RI N D I A N R I V E R

B R E V A R DB R E V A R D

V O L U S I AV O L U S I A

B R E V A R DB R E V A R D

Esri, HERE, Garmin, (c) OpenStreetMap contributors

United States Department of Agriculture

A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants

Custom Soil Resource Report for

Brevard County, Florida

Natural Resources Conservation Service

August 12, 2022

Preface Soil surveys contain information that affects land use planning in survey areas.

They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers.

Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment.

Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions.

The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations.

Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?

cid=nrcs142p2_053951).

Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations.

The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey.

Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information.

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer.

Contents Preface How Soil Surveys Are Made Soil Map

Soil Map Legend Map Unit Legend Map Unit Descriptions

Brevard County, Florida 28—Immokalee sand, 0 to 2 percent slopes 36—Myakka sand, 0 to 2 percent slopes 49—Pomello sand, 0 to 5 percent slopes 55—St. Johns sand, depressional 67—Tomoka muck, frequently ponded, 0 to 1 percent slopes 91—Anclote sand

References

How Soil Surveys Are Made Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity.

Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA.

The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape.

Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries.

Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units).

Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research.

The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas.

Soil scientists make many field observations in the process of producing a soil map.

The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded.

These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape.

Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties.

While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management.

Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil.

Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date.

After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and

Custom Soil Resource Report identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately.

Soil Map The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit.

Soil Map

518300 518600 518900 519200 519500 519800 520100

518300 518600 518900 519200 519500 519800 520100

28° 28' 15'' N

8'

7' ' W

28° 28' 15'' N

7'

6' ' W

28° 26' 52'' N

8'

7' ' W

28° 26' 52'' N

7'

6' ' W

N

Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 0 500 1000 2000 3000

Feet 0 150 300 600 900

Meters Map Scale: 1:12,500 if printed on A portrait (8.5" x 11") sheet.

Soil Map may not be valid at this scale.

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: Brevard County, Florida Survey Area Data: Version 21, Aug 25, 2021

Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Mar 28, 2015—May 18, 2015

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.

Map Unit Legend

Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI

28 Immokalee sand, 0 to 2 percent slopes

20.4 32.1%

36 Myakka sand, 0 to 2 percent slopes

17.2 27.1%

49 Pomello sand, 0 to 5 percent slopes

11.4 17.9%

55 St. Johns sand, depressional 5.5 8.6%

67 Tomoka muck, frequently ponded, 0 to 1 percent slopes

0.7 1.1%

91 Anclote sand 8.4 13.2%

Totals for Area of Interest 63.6 100.0%

Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit.

A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class.

Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils.

Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape.

The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas.

An identifying symbol precedes the map unit name in the map unit descriptions.

Each description includes general facts about the unit and gives important soil properties and qualities.

Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement.

Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.

Some map units are made up of two or more major soils or miscellaneous areas.

These map units are complexes, associations, or undifferentiated groups.

A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps.

The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.

An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.

An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.

Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example.

Brevard County, Florida

28—Immokalee sand, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: 2s3ll Elevation: 0 to 150 feet Mean annual precipitation: 42 to 57 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 Immokalee and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Immokalee

Setting Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Convex, linear Across-slope shape: Linear Parent material: Sandy marine deposits

Typical profile A - 0 to 9 inches: sand E - 9 to 36 inches: sand Bh - 36 to 55 inches: sand C - 55 to 80 inches: sand

Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.57 to 1.98 in/hr) Depth to water table: About 6 to 18 inches Frequency of flooding: None Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 4.0 Available water supply, 0 to 60 inches: Very low (about 3.0 inches)

Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4w Hydrologic Soil Group: B/D Forage suitability group: Sandy soils on flats of mesic or hydric lowlands

(G155XB141FL)

Other vegetative classification: South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: No

Minor Components

Valkaria Percent of map unit: 5 percent Landform: Drainageways on flatwoods on marine terraces Landform position (three-dimensional): Tread, dip, talf Down-slope shape: Linear Across-slope shape: Linear, concave Other vegetative classification: Slough (R155XY011FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: Yes

Oldsmar Percent of map unit: 4 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Convex, linear Across-slope shape: Linear Other vegetative classification: South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: No

Pomello Percent of map unit: 3 percent Landform: Ridges on marine terraces, knolls on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Down-slope shape: Convex, linear Across-slope shape: Linear Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) Hydric soil rating: No

Satellite Percent of map unit: 2 percent Landform: Drainageways on flatwoods on marine terraces Landform position (three-dimensional): Tread, dip, talf Down-slope shape: Linear Across-slope shape: Linear, concave Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) Hydric soil rating: No

Felda Percent of map unit: 1 percent Landform: Drainageways on marine terraces, flatwoods on marine terraces Landform position (three-dimensional): Tread, dip, talf Down-slope shape: Linear Across-slope shape: Concave, linear Other vegetative classification: Slough (R155XY011FL), Sandy over loamy soils on flats of hydric or mesic lowlands (G155XB241FL) Hydric soil rating: Yes

36—Myakka sand, 0 to 2 percent slopes

Map Unit Setting National map unit symbol: 2twt9 Elevation: 10 to 130 feet Mean annual precipitation: 43 to 62 inches Mean annual air temperature: 64 to 77 degrees F Frost-free period: 280 to 365 days Farmland classification: Farmland of unique importance

Map Unit Composition Myakka and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Myakka

Setting Landform: Flatwoods on marine terraces Landform position (three-dimensional): Tread, talf Down-slope shape: Convex Across-slope shape: Linear Parent material: Sandy marine deposits

Typical profile A - 0 to 6 inches: sand E - 6 to 20 inches: sand Bh - 20 to 36 inches: sand C - 36 to 80 inches: sand

Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Drainage class: Poorly drained Runoff class: Very high Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.57 to 5.95 in/hr) Depth to water table: About 6 to 18 inches Frequency of flooding: None Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 4.0 Available water supply, 0 to 60 inches: Low (about 5.0 inches)

Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4w Hydrologic Soil Group: A/D Forage suitability group: Sandy soils on flats of mesic or hydric lowlands

(G155XB141FL)

Other vegetative classification: South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL)

Hydric soil rating: No

Minor Components

Valkaria Percent of map unit: 5 percent Landform: Drainageways on marine terraces Landform position (three-dimensional): Dip Down-slope shape: Convex, linear Across-slope shape: Linear, concave Other vegetative classification: Slough (R155XY011FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: Yes

Basinger Percent of map unit: 5 percent Landform: Drainageways on marine terraces Landform position (three-dimensional): Dip Down-slope shape: Linear, convex Across-slope shape: Concave, linear Other vegetative classification: Sandy soils on flats of mesic or hydric lowlands

(G155XB141FL)

Hydric soil rating: Yes

Oldsmar Percent of map unit: 5 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Convex Across-slope shape: Linear Other vegetative classification: South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: No

49—Pomello sand, 0 to 5 percent slopes

Map Unit Setting National map unit symbol: 2sm5n Elevation: 0 to 160 feet Mean annual precipitation: 46 to 64 inches Mean annual air temperature: 68 to 77 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland

Map Unit Composition Pomello and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Pomello

Setting Landform: Ridges on marine terraces, knolls on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Down-slope shape: Convex Across-slope shape: Linear Parent material: Sandy marine deposits

Typical profile A - 0 to 4 inches: sand E - 4 to 56 inches: sand Bh - 56 to 62 inches: sand Bw - 62 to 80 inches: sand

Properties and qualities Slope: 0 to 5 percent Depth to restrictive feature: More than 80 inches Drainage class: Somewhat poorly drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): High (1.98 to 5.95 in/hr) Depth to water table: About 18 to 42 inches Frequency of flooding: None Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 4.0 Available water supply, 0 to 60 inches: Very low (about 2.5 inches)

Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 6s Hydrologic Soil Group: A Forage suitability group: Sandy soils on rises and knolls of mesic uplands

(G155XB131FL)

Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) Hydric soil rating: No

Minor Components

Immokalee Percent of map unit: 5 percent Landform: Flatwoods on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Other vegetative classification: South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: No

Tavares Percent of map unit: 4 percent Landform: Ridges on marine terraces, flatwoods on marine terraces, hills on marine terraces, knolls on marine terraces

Landform position (two-dimensional): Summit Landform position (three-dimensional): Interfluve, side slope, tread, rise Down-slope shape: Convex, linear Across-slope shape: Linear, convex Other vegetative classification: Longleaf Pine-Turkey Oak Hills (R155XY002FL), Sand Pine Scrub (R155XY001FL), Sandy soils on rises, knolls, and ridges of mesic uplands (G155XB121FL)

Hydric soil rating: No

Satellite Percent of map unit: 3 percent Landform: Knolls on marine terraces, rises on marine terraces, flatwoods on marine terraces Landform position (three-dimensional): Tread, talf, rise Down-slope shape: Convex, linear Across-slope shape: Linear Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on rises and knolls of mesic uplands (G155XB131FL) Hydric soil rating: No

St. lucie Percent of map unit: 3 percent Landform: Ridges on marine terraces, knolls on marine terraces Landform position (two-dimensional): Summit, backslope Landform position (three-dimensional): Interfluve, side slope, riser Down-slope shape: Convex Across-slope shape: Linear Other vegetative classification: Sand Pine Scrub (R155XY001FL), Sandy soils on ridges and dunes of xeric uplands (G155XB111FL) Hydric soil rating: No

55—St. Johns sand, depressional

Map Unit Setting National map unit symbol: 1lg44 Elevation: 0 to 30 feet Mean annual precipitation: 49 to 57 inches Mean annual air temperature: 68 to 75 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland

Map Unit Composition St. johns and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of St. Johns

Setting Landform: Depressions on marine terraces

Landform position (three-dimensional): Dip Down-slope shape: Concave Across-slope shape: Concave Parent material: Sandy marine deposits

Typical profile A - 0 to 11 inches: sand E - 11 to 19 inches: sand Bh - 19 to 31 inches: sand Cg - 31 to 70 inches: sand

Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches Drainage class: Very poorly drained Runoff class: Negligible Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high

(0.57 to 1.98 in/hr) Depth to water table: About 0 inches Frequency of flooding: None Frequency of ponding: Frequent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 4.0 Available water supply, 0 to 60 inches: Low (about 5.0 inches)

Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7w Hydrologic Soil Group: B/D Forage suitability group: Sandy soils on stream terraces, flood plains, or in depressions (G156BC145FL) Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Sandy soils on stream terraces, flood plains, or in depressions

(G156BC145FL)

Hydric soil rating: Yes

Minor Components

Myakka 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: Freshwater Marshes and Ponds (R155XY010FL), Sandy soils on stream terraces, flood plains, or in depressions

(G156BC145FL)

Hydric soil rating: Yes

Basinger 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: Freshwater Marshes and Ponds (R155XY010FL), Sandy soils on stream terraces, flood plains, or in depressions

(G156BC145FL)

Hydric soil rating: Yes

Tomoka Percent of map unit: 2 percent Landform: Marshes on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Organic soils in depressions and on flood plains (G156BC645FL) Hydric soil rating: Yes

67—Tomoka muck, frequently ponded, 0 to 1 percent slopes

Map Unit Setting National map unit symbol: 2ttlp Elevation: 0 to 110 feet Mean annual precipitation: 46 to 61 inches Mean annual air temperature: 68 to 77 degrees F Frost-free period: 335 to 365 days Farmland classification: Not prime farmland

Map Unit Composition Tomoka and similar soils: 85 percent Minor components: 15 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Tomoka

Setting Landform: Depressions on marine terraces Landform position (three-dimensional): Dip, talf Down-slope shape: Concave Across-slope shape: Concave Parent material: Herbaceous organic material over sandy and loamy marine deposits

Typical profile Oa - 0 to 34 inches: muck C1 - 34 to 39 inches: sand C2 - 39 to 80 inches: sandy clay loam

Properties and qualities Slope: 0 to 1 percent Depth to restrictive feature: More than 80 inches Drainage class: Very poorly drained Runoff class: Negligible

Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.57 to 5.95 in/hr)

Depth to water table: About 0 inches Frequency of flooding: None Frequency of ponding: Frequent Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 4.0 Available water supply, 0 to 60 inches: Very high (about 17.7 inches)

Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7w Hydrologic Soil Group: A/D Forage suitability group: Organic soils in depressions and on flood plains

(G155XB645FL)

Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Organic soils in depressions and on flood plains (G155XB645FL) Hydric soil rating: Yes

Minor Components

Hontoon Percent of map unit: 4 percent Landform: Depressions on marine terraces, swamps on marine terraces Landform position (three-dimensional): Tread, dip Down-slope shape: Concave, linear Across-slope shape: Concave, linear Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Organic soils in depressions and on flood plains (G155XB645FL) Hydric soil rating: Yes

Floridana Percent of map unit: 3 percent Landform: Depressions on marine terraces Landform position (three-dimensional): Tread, dip Down-slope shape: Concave, linear Across-slope shape: Concave, linear Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Sandy over loamy soils on stream terraces, flood plains, or in depressions

(G155XB245FL)

Hydric soil rating: Yes

Samsula Percent of map unit: 2 percent Landform: Depressions on marine terraces Landform position (three-dimensional): Tread, dip Down-slope shape: Concave Across-slope shape: Concave Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Organic soils in depressions and on flood plains (G155XB645FL) Hydric soil rating: Yes

Terra ceia Percent of map unit: 2 percent Landform: Depressions on marine terraces Landform position (three-dimensional): Tread, dip Down-slope shape: Concave, convex

Across-slope shape: Concave, linear

Organic soils in depressions and on flood plains (G155XB645FL) Hydric soil rating: Yes

Canova Percent of map unit: 2 percent Landform: Depressions on marine terraces Landform position (three-dimensional): Dip, talf Down-slope shape: Concave, linear Across-slope shape: Concave, linear Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Organic soils in depressions and on flood plains (G155XB645FL) Hydric soil rating: Yes

St. johns Percent of map unit: 1 percent Landform: Flats on marine terraces, depressions on marine terraces Landform position (three-dimensional): Tread, talf, dip Down-slope shape: Linear Across-slope shape: Concave Other vegetative classification: South Florida Flatwoods (R155XY003FL), Sandy soils on flats of mesic or hydric lowlands (G155XB141FL) Hydric soil rating: Yes

Placid Percent of map unit: 1 percent Landform: Drainageways on marine terraces, depressions on marine terraces Landform position (three-dimensional): Tread, dip Down-slope shape: Concave Across-slope shape: Concave Other vegetative classification: Freshwater Marshes and Ponds (R155XY010FL), Sandy soils on stream terraces, flood plains, or in depressions

(G155XB145FL)

Hydric soil rating: Yes

91—Anclote sand

Map Unit Setting National map unit symbol: 1lg58 Elevation: 10 to 80 feet Mean annual precipitation: 49 to 57 inches Mean annual air temperature: 68 to 75 degrees F Frost-free period: 350 to 365 days Farmland classification: Not prime farmland

Map Unit Composition Anclote and similar soils: 90 percent Minor components: 10 percent Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Anclote

Setting Landform: Flats on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Parent material: Sandy marine deposits

Typical profile A - 0 to 19 inches: sand Cg - 19 to 72 inches: sand

Properties and qualities Slope: 0 to 2 percent Depth to restrictive feature: More than 80 inches 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 19.98 in/hr) Depth to water table: About 0 to 6 inches Frequency of flooding: None Frequency of ponding: None Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Sodium adsorption ratio, maximum: 4.0 Available water supply, 0 to 60 inches: Low (about 5.3 inches)

Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 3w Hydrologic Soil Group: A/D Forage suitability group: Sandy soils on flats of mesic or hydric lowlands

(G156BC141FL)

Other vegetative classification: Slough (R155XY011FL), Sandy soils on flats of mesic or hydric lowlands (G156BC141FL) Hydric soil rating: Yes

Minor Components

Chobee Percent of map unit: 5 percent Landform: Flats on marine terraces Landform position (three-dimensional): Talf Down-slope shape: Linear Across-slope shape: Linear Other vegetative classification: Loamy and clayey soils on flats of hydric or mesic lowlands (G156BC341FL) Hydric soil rating: Yes

Floridana Percent of map unit: 5 percent Landform: Depressions on marine terraces Landform position (three-dimensional): Dip Down-slope shape: Concave Across-slope shape: Concave

Sandy over loamy soils on stream terraces, flood plains, or in depressions

(G156BC245FL)

Hydric soil rating: Yes

References American Association of State Highway and Transportation Officials (AASHTO).

2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition.

American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00.

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31.

Federal Register. July 13, 1994. Changes in hydric soils of the United States.

Federal Register. September 18, 2002. Hydric soils of the United States.

Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States.

National Research Council. 1995. Wetlands: Characteristics and boundaries.

Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.

U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262

Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition.