Regional Sediment Management - St. Johns River Entrance Application

Oct 13, 2026

This technical presentation by the U.S. Army Corps of Engineers, Jacksonville District, outlines the application of Regional Sediment Management (RSM) strategies for the St. Johns River Entrance project. The document provides an extensive overview of harbor project backgrounds, including the Jacksonville Harbor and Mayport Naval Station, focusing on federal channel depths and morphological conditions. It details sediment characteristics through vibracore data and analysis of sand composition, highlighting the importance of sediment transport modeling for predicting deposition and erosion within the littoral zone. The presentation serves as a foundational guide for engineers and stakeholders interested in the systematic approach to managing coastal sediment resources to enhance project efficiency and environmental sustainability.

LanguageEnglish

CategoryPresentations

FormatPDF

Pages26

Reading Time9 min

AccessFree to download

Presentation Outline

Jacksonville Harbor Project Background

Project vs Regional View

Coastal System Approach

Summary & Conclusion

Project Location

Lower St. Johns River Basin

Jacksonville Harbor – Mayport NS

Sediment Characteristics

2007 Vibracores Data

Particle Size Distribution

FAQs

What is the primary objective of Regional Sediment Management at the St. Johns River entrance?

The primary objective is to manage sediment as a valuable resource by understanding existing conditions, inlet and adjacent beach morphology, and the regional effects of project modifications through transport modeling.

What are the specific depth parameters mentioned for the Jacksonville Harbor project?

The existing project depth is 40 feet, with proposed depths ranging between 40 and 50 feet, while the Mayport Naval Station has a project depth of 50 feet.

How is the sediment composition at the project site characterized?

Based on 2007 vibracores and 2010 distribution analysis, the sediment is composed of approximately 60-75% fine sand, 15% medium/coarse sand, and 10-25% silt/clay.

Oct 13, 2026

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