5-Exhbit C - Bathymetric Survey File 1 Canal 82.pdf

PDF 4 MB Posted Nov 22, 2025

Attached to: Organic Removal and Backfilling for Canal #82, Key Largo
Solicitation number: RFP-614
Issued by: Monroe County, Florida

About this file

Written by GovTribe AI · Nov 26, 2025

Bathymetric Survey File for Canal 82, Monroe County, Florida

This is a topographic and bathymetric survey document prepared by WSP USA Environment & Infrastructure Inc. for Monroe County, Florida, documenting hydrographic conditions in Canal 82 located near Lobster Lane on Plantation Key in Key Largo. The survey was conducted to identify and map elevations in and around the boat ramp basin area as specified by the client, with field data acquisition completed on June 5, 2024. The survey employed a SonarMite DFX Dual Frequency survey grade echosounder for hydrographic data collection, with horizontal and vertical positioning measured using Trimble R8S and R6 dual frequency survey grade receivers operating in Real-Time Kinematic (RTK) mode. All bathymetric data is presented as actual elevations relative to the North American Vertical Datum of 1988 (NAVD 88), with contour lines, elevations, and physical features demonstrating expected accuracy of one-half the contour interval or better.

The survey data comprises comprehensive depth measurements throughout the canal basin, with recorded elevations ranging from approximately -2.2 feet to -12.9 feet relative to NAVD 88. Coordinates and elevations are referenced to the North American Datum of 1983 (2011 Adjustment), projected in the Florida State Plane Coordinate System, Florida East Zone 901, using US survey feet. The survey control station at Plantation Key (Site Code FLPK) is located at Northing 229084.35 feet and Easting 799225.28 feet with an elevation of 34.35 feet, with calculated positional accuracy of 2 centimeters or better based on National Geodetic Survey OPUS Adjustment. This baseline hydrographic information supports the planned organic muck removal and backfilling activities for Canal 82 intended to remove oxygen-depleting organic materials and establish a natural benthic community.

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Other files

File	Type	Posted
8-Addendum 1 for Canal 82 Restoration.pdf	PDF	Nov 22, 2025
4-Exhibit B - Engineering and Ecological Report 1 Canal 82.pdf	PDF	Nov 22, 2025
2-Legal Notice.docx	DOCX document	Nov 22, 2025
1-RFP.pdf	PDF	Nov 22, 2025
6-Exhibit D - Permits 2 Canal 82.pdf	PDF	Nov 22, 2025
7-Exhibit E - Grant KG006 Original Agreement Executed (003).pdf	PDF	Nov 22, 2025
3-Exhibit A - Design Drawings 1 Canal 82.pdf	PDF	Nov 22, 2025

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Surveyor's Notes:

Project Location

Location Map (Not to Scale)

MIAMI-

MADISON

TAYLOR

WALT

ROSA

ESCAM

BIA

SANTA

WAKULLA JE

FRANKLIN

LIBERTY

GULF

GADSDEN

HOLMES JACKSON

WASHINGTON

BAY

N LEON

OKEECHOBEE

MANATEE

GLADES

HARDEE

HIGHLANDS

DE SOTO

CHARLOTTE

LEE

MONROE

HENDRY

COLLIER

RIVER

MARTIN

ST. LUCIE

BEACH

PALM

BROWARD

DADE

OSCEOLA

SUW

ANNEE

BRADFO

ALACHUA

MARION

PASCO

UNION

GILCHRIST

DIXIE

LAFAYETTE

LEVY

PINELLAS

HERNANDO

CITRUS

ORANGE

CLAY

PUTNAM

FLAGLER

ST. JOHNS

LAKE

VOLUSIA

SEMINOLE

POLK

BAKER

COLUM

BIA

HAMILTON

NASSAU

DUVAL

INDIAN

BREVARD

Project Location

CHARLES B. GARDINER

FLORIDA PROFESSIONAL SURVEYOR AND MAPPER

LICENSE NO. LS 5046

Monroe County, Florida of

Located in Section 13, Township 62 South, Range 38 East of R ev is io n

Pr oj ec t T itl e:

Sh ee t N o.

Pr ep ar ed fo r:

D w g.

D at e:

Co un ty : M on ro e Co un ty

, F lo rid a Ph ot o

D at e:

Fi el d

Bo ok s:

D ra w n by

O ffi ce N o.

C he ck ed b y:

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N am e:

M on ro e

C ou nt y, F lo rid a

Lo ca te d in

D at e

Prepared by:

Last Day in Field: 06/05/2024

R ev is io n D at e

GRA3HIC SCALE

1 inch = 40 ft.

(IN FEET)

N2RTH

0 20 40 80

Map of Topographic Survey

Canal 82

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N: = NORTHING

E: = EASTING

= TOP OF SEDIMENT ELEVATION

= HARD BOTTOM ELEVATION

LEGEND

1. This Map of Topographic Survey is not valid without the signature and original raised Seal of a Florida Licensed Surveyor and Mapper.

2. Additions or deletions to this Map of Topographic Survey by other than the signing party or parties is prohibited without the written consent of the signing party or parties.

3. The purpose of this survey is to identify and map the elevations in and around the boat ramp basin area as specified by the client.

4. Hydrographic data for this survey was gathered using an SonarMite DFX Dual Frequency survey grade echosounder. The horizontal and vertical positions of the echosounder were measured using a Trimble R8S and R6 dual frequency survey grade receivers operating in RTK mode.

Hydrographic data collection and post processing was done with Trimble Hydro pro software. All bathymetric data is shown as actual elevations relative to NAVD 1988. Contour lines, elevations and physical features shown hereon have an expected accuracy of one half the contour interval or better.

Canal 82

L2BSTER LANE

Altamonte Springs, FL 32701 USA

WSP USA Environment & Infrastructure Inc.

www.WSP.com Phone: (407) 522-7570

Certificate of Authorization Number LB-0007932

550 Northlake Boulevard, Suite 1000

6. Underground improvements, such as foundations and utilities, were not located.

7. Source of aerial photography/image: The Florida Department of Transportation (FDOT) Aerial Photo Lookup System website, (labins.org). This digital orthographic imagery was acquired on 01/19/2022 per metadata provided.

This imagery is shown for reference only; this survey does not warrant the accuracy of this imagery.

8. This survey does not address the location of any wetlands or sovereign lands that may or may not lie within or adjacent to the lands surveyed.

9. The field data acquisition phase of this survey was completed on 06/05/2024, as documented in WSP field book 1241.

10. The lands surveyed were not abstracted for ownership, easements, rights-of-way or other title matters by this firm.

5. Coordinates and Elevations shown hereon are relative to the North American Datum of 1983, 2011 Adjustment, projected in the Florida State Plane Coordinate System, Florida East Zone 901, US survey feet, and; the North American Vertical Datum of 1988 (NAVD 88) based on Global Positioning System (GPS) measurements to the National Geodetic Survey (NGS) Continuously Operating Reference Stations (CORS) network. The positions of the project control stations shown hereon have a calculated positional accuracy of 2 cm or better based upon the NGS OPUS Adjustment Report.

DESIGNATION: PLANTATION KEY

SITE CODE: FLPK

NORTHING: 229084.35'

EASTING: 799225.28'

ELEVATION: 34.35'

B2NIT2 LANE

DRAFT 06/18/2024

Sheets and Views

Canal 82-Layout1-24x36

File details come from the government source that posted it. Updated Nov 26, 2025.