180227-JAXBCH-R31-R39_SurveyReport.pdf

Telephone: (904) 384-8377 ǀ Fax: (904) 384-8388 ǀ www.arcsurveyors.com ǀ

SURVEYOR’S REPORT

Beach Survey – Duval County Beach

Profiles R31-R39 (Duval County) Survey No. ARC 08-02-27

Prepared For:

olsen associates, inc.

2618 Herschel Street Jacksonville, FL 32204

Project: 180227 – Duval County Beach R31 – R39 Location: Duval County, Florida Date of Survey: March 12 – 16, 2018 Date of Report: March 20, 2018

Report:

The purpose of the survey was to perform a topographic and hydrographic survey (upland and offshore) of historic beach profile ranges located in Duval County in order document current conditions.

Limits of Survey:

The survey included profile lines R-31 through R-39 Duval County, Florida.

Survey Site Control:

ID Northing Easting Elevation

BC 1553 R 67 2164713.35 533512.77 10.40

BC 0502 Y 324 2165066.67 533462.99 10.58

*Survey control provided by U.S. Army of Corps of Engineers (ACOE). The values provided for site control were part of a previous ACOE survey of Duval Beach. #16-094.

Horizontal coordinates are referenced to the State Plane Coordinate System, FloridaEastZone0901, North American Datum of 1983 (2011), U.S. Survey Feet.

Elevations were referenced to the National American Vertical Datum of 1988(NAVD88).

Survey No. 18-02-27

Arc Surveying & Mapping, Inc.

5202 San Juan Avenue Jacksonville, Florida 32210

Quality checks and verification for topographic data was accomplished by comparing daily RTK/GPS measurements to known values at provided control points. Refer to Table 1

Field Methodology:

1. Control points from ACOE project 16-094 were used.

2. RTK/GPS surveying procedures were used to acquire topographic data along Range lines for upland and wading portion of survey.

3. RTK/GPS measurements were verified daily against existing project control for horizontal and vertical accuracy.

4. Static sessions were run at the RTK/GPS base station during upland data acquisition and were submitted to OPUS for verification and quality assurance.

Office Methodology:

1. Daily field checks to control points were reviewed to confirm the horizontal and vertical accuracy.

2. RTK infill was collected on base points, processed by OPUS and compared to static sessions.

3. Coordinate files were obtained from the RTK data collectors and converted to ASCII files.

I Certify that this survey meets the requirements of the Florida Professional Standards for Surveying and Mapping, Chapter 5J-17, F.A.C. and Chapter 472 F.S.

Richard J. Sawyer, ACSM Certified Hydrographer No. 194 Professional Surveyor and Mapper No. 6131

NOT VALID WITHOUT THE SIGNATURE AND THE ORIGINAL RAISED

SEAL OF A FLORIDA LICENSED SURVEYOR AND MAPPER

Survey No. 18-02-27

Table 1

RTK/GPS Quality Assurance Checks

Checkin to R 67 POINT No. NORTHING EASTING ELEV. Δ HORIZ. Δ VERT.

100031 2164713.37 533512.87 10.38 0.10 0.02 100032 2164713.35 533512.87 10.40 0.10 0.00 100033 2164713.36 533512.86 10.39 0.09 0.01 100034 2164713.34 533512.88 10.40 0.11 0.00 100035 2164713.34 533512.89 10.40 0.12 0.00 100036 2164713.34 533512.87 10.37 0.10 0.03 100037 2164713.32 533512.86 10.38 0.10 0.02 100038 2164713.31 533512.85 10.36 0.10 0.04 100039 2164713.31 533512.85 10.39 0.08 0.01 100040 2164713.31 533512.83 10.40 0.07 0.00

0.10 0.01

Checkin to Y 324

100027 2165066.70 533463.02 10.48 0.04 0.11 100028 2165066.70 533463.03 10.49 0.05 0.09 100029 2165066.70 533463.04 10.48 0.06 0.10 100030 2165066.69 533463.04 10.48 0.05 0.10 100026 2165066.72 533463.02 10.56 0.06 0.03

Survey No. 18-02-27