View a copy of the June 11, 2015, presentation about

View a copy of the June 11, 2015, presentation about

ST. JOHNS RIVER WATER
MANAGEMENT DISTRICT
Eau Gallie River & Elbow Creek
Restoration Dredging
Melbourne, Florida
Planning, Permitting, and Final Engineering Design
June 11, 2015
Introductions
St. Johns River Water Management District
• Ralph Brown, P.E. (Project Manager)
• Woody Boynton, P.E. (Director, Division of
Administrative and Operational Services)
• William Tredik, P.E. (Indian River Lagoon
Protection Initiative Leader)
Taylor Engineering, Inc.
• Jonathan Armbruster, P.E. (Project Manager)
• David Stites, Ph.D. (Environmental Services)
Amec Foster Wheeler, Inc.
• Mike Kelley, P.E. (Survey and Geotechnical
Investigations)
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Presentation Outline
1) Project Problem, Objectives, and Solution
2) Project Location
a) Dredging footprint
b) Dredged material management footprint
3) Construction Methods
a) Hydraulic dredging and pipeline
b) Temporary dredged material management area (DMMA)
c) Dewatering
d) Permanent sediment storage
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Presentation Outline
4. Project Progress
a) Data Collection
b) Design
c) Permitting
5. Project Schedule
a) Design and Permitting
b) Construction
6. Questions and Answers
4
Project Problem
• Muck deposits in the Eau Gallie River and Elbow Creek
damage:
o Water quality and natural resources
o Recreational activities
o Property values
o Navigability
5
Project Objectives
•
Improve ecosystem characteristics
o Water quality and habitat
o Wildlife diversity
• Improve recreational opportunities
o Fishable/swimmable waters
Ballard Park Boat Ramp
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Project Solution
•
Restoration Dredging
o Remove accumulated muck sediments
o Dewater and dispose of dredged material
o Avoid water quality, wetland, and species impacts
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Project Dredging Limits
• Dredge from the confluence of the
IRL with the Eau Gallie River to the
Eau Gallie River Control Dam
Upstream Eau Gallie Control Dam
• Project limits also include Elbow
Creek from:
o Confluence of Elbow Creek &
Eau Gallie River
o Laurie Street Bridge
o Magnolia Avenue Bridge
Downstream Eau Gallie Control Dam
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Project Introduction (Overview)
a) Overview
b) Background
Eau Gallie River Restoration
Project begins at the mouth
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Eau Gallie Control Dam
a) Overview
b) Background
Eau Gallie River Restoration
Project ends at the control dam
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Complete Project Footprint
Dredging Here
Sediment
Management
Here
DMMA:
Sediment
Dewatering
Dredging Pipelines
Sediment
Storage
Melbourne Airport
Project Equipment on the Water
Hydraulic Dredge
• 12–18 inch hydraulic dredge • Observer boats
• DMMA return water pipeline
• Booster pumps
• Turbidity curtains • Dredge crew work boats
• Dredged pipelines
• Signs
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DMMA Facility and Equipment
• Booster pumps
• Dredged material slurry
pipeline
• DMMA return water pipeline
Typical DMMA View
• Earthwork
equipment
• Worker vehicles
• Job trailer
Typical Paired Pipeline Layout
14
Dewatering Techniques
• Gravity settling (primary method)
• Optional methods (If necessary)
o Coagulants/flocculants
o Geotextile tubes
o Hydrocyclones
o Filter presses
o Scalping pump boxes
o Hydraulic scalpers and
classifiers
Geotextile Tubes
Hydrocyclone
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Final Sediment Disposal
•
Material will be trucked from
the DMMA site to Sarno Road
Landfill
•
Trucking route avoids public
roads
•
Approx. 625,000 cubic yards
DMMA
Truck Route
Disposal
20 cubic yard dump truck
16
Survey & Geotechnical Data Collection
•
Bathymetric and boundary surveys
•
Shoreline condition survey
•
Geotechnical investigation (water and land)
•
Sediment chemistry
o Metals, nutrients, flocculent, and coagulant testing
Muck Location
Muck Probe
Muck Thickness
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Natural Resources Surveys and Assessments
•
•
•
•
•
Shoreline vegetation
Submerged resources
Wetlands delineations
Upland habitat characterization
Listed species assessments
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Engineering Design – Dredging Template
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Engineering Design - Pipeline Corridor
• Paired pipeline
o Slurry inflow and water
outflow
• Directional drill under major
roadways
o Apollo Road
o Wickham Road
• Road cuts under smaller roads
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Engineering Design - DMMA
• Earthen containment
facility
• Stormwater management
• Outflow weir
• Internal roads
• Vegetated buffers and
fencing
Discharge Weir
21
Environmental Protections
• Daylight (12 hours) dredge operation
• Contractor safety controls in project specifications
• Noise protection
o No night time equipment operation
o Noise-shielded booster pump operation
• In-water signs and markers for pipeline and dredging
equipment
• Turbidity management
o Turbidity not to exceed 29 NTU above background (FDEP)
• Manatee Protection Plan requirements
• Shoreline and DMMA vegetated buffers
• Fencing around DMMA
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Permitting
• Required permits
o FDEP and USACE
o Project qualifies for restoration
permits
o City of Melbourne
• Coordination
o Brevard County
o City of Melbourne Airport Authority
o City of Melbourne
o Florida East Coast Railroad
o Other private entities
o EGRET
23
Project Schedule – Permit Authorizations
Federal, State, City of Melbourne Permits
• For DMMA construction – mid-September 2015
• For dredging – early 2016
Construction
• DMMA construction – Fall 2015
• Dredging begins – Winter–Spring 2016
• Project completion – December 2018
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Questions?
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