June 30, 2009
Below, you will find links to the Lake Worth Dredging Design Survey Report of 2009. You can identify the links because they are underlined. (The topics listed below the links will be found in the link just above it.)
It's important that you understand that the study only covers portions of the lake under consideration for dredging. Much of the lake was not scanned or documented.
Objects Tagged and Identified:
The study contains several items of interest to residents. First, there are lists of objects found on the bottom. Since a "side scanning" radar was used (whick allows photographic images of the objects), many of the objects were identified. The lists show the location of the object and its most likely identification. The report lists objects such as barrels, logs, pipes, pilings, etc. which are located and identified.
Historical Finds:
The report also reveals some history of the area. The most striking example are the pilings for the Nine Mile Bridge. The radar image clearly shows the pilings lying at the bottom of the lake complete with the arches that held the roadway. (Click here to view in Appendix M.) Another interesting area is the flat shelf south of Willow Island. The survey shows that the shelf is very flat with two deep holes that could have been quarries or ponds. The flatness of the shelf may indicate agriculture or some other use. (Click here and go to page 46 and page 47 for a good view.)
The Report Below:
To make the document easier to read, it has been broken into portions. At the bottom of the page is a file that contains the entire document.
Enjoy!
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Lake Worth Dredging Survey Report 2009
Executive Summary
Table of Contents
Introduction
Background
Organization of the Report
Equipment
Sonar
Sonar System Configurations
Side-scan System
Multi-beam and Sub-bottom System
Ancillary System Configurations
Push-to-tag
DGPS
Conclusions
Bathymetry
Planning
Survey Concept of Operations
Data Processing
Multi-beam
Sub-bottom
Moment Arm
Data Rendering
Summary Results
Conclusions
Bottom Condition
Planning
Survey Concept of Operations
Data Processing
Summary Results
Conclusions
Error Analysis
Assumptions
Depth Error
Position Error
Total Position Error
Sound Speed
Summary
Summary and Conclusions
GLOSSARY
Appendix A - Survey Areas, Bottom Characterization, Sub-Bottom Characterization, Bottom Condition Characterization, Objects of Interest, Surf Zone Observation.
Appendix B - Casino Beach Park Area
Appendix C - Willow Island Area
Appendix D - Sunset Park and Sunrise Point Area
Appendix E - Camp Joy Park Area
Appendix F - Mound SW of Penninsula Club Circle
Appendix G - Wildwood Park Inlet
Appendix H, I & J - Goat Island to Silver Creek Basin
Appendix K - Arrow S Park
Appendix L - Hatchery Coves
Appendix M - Nine Mile Bridge
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Entire Document - This file is BIG! (Over 100 mb) It will take a pretty good bit of time to download it - even with a good Internet connection.
