CONTECH SOUTHERN CULVERT

CONTECH
SOUTHERN CULVERT
WATER CONTROL STRUCTURES
Bill Burnette, P.E.
Tom Masterson, P.E.
WATER CONTROL
STRUCTURES
Š An Irrigation, Drainage, or Water
Management System that Conveys Water,
Controls Direction or Rate of Flow, and/or
Maintains a Desired Water Surface
Elevation.
PURPOSE – PART OF
CONSERVATION MANAGEMENT
SYSTEM
Š Control the Stage, Discharge, Distribution or
Direction of Water in Open Channels
Š Provide Water Quality Control
Š Protect Fish and Wildlife and Other Natural
Resources
COMPLIANCE
Š FWMD – Chapters 40,40.4,41,44,47 F.A.C.
Š FDOT – Specs for Road & Bridge Design
Š National Engineering Handbook
Š NRCS – Fl. Conservation Practice Standard
DESIGNING FLASHBOARD
RISERS
Š Pre-design Data Needed
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Drainage Area
Ditch Depth
Outlet Conditions
Ground Elevation
DESIGNING FLASHBOARD
RISERS
Š Data to be Determined
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Flow Rate
Dia. of Culvert Needed
Dia. of Flashboard Riser Needed
Dia. of Full Round Part of Riser
Length of Culvert
Height of Flashboard
Type of Material
Gage, Shape, Coating
PIPE/RISER SPECIFICATION
Š Size 12” – 120”
Š Steel or Aluminum
„
Steel
z
z
z
„
Galvanized
Asphalt Coated
Aluminized Steel
pH of 5.5 – 8.0
not in brackish environment
Aluminum
pH of 4.0 – 9.0
acceptable in brackish environment
PIPE/RISER SPECIFICATION
Š Corrugation and Gage
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„
2 2/3” x ½” or 3” x 1”
16 gage – 8 gage
Š Specifications
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FDOT Roadway Design
AASHTO/ASTM
z
z
z
Galv. Steel – M36
Aluminized Steel – M 274
Aluminum – M197
INSTALLATION
Š Objectionable Materials Removed
Š Flat Bedding – Firm, Smoothly Graded
Š Backfill with Select Materials and Placed in
Layers not to exceed 8”
Š Proper Compaction – Handtampers
Š Even Backfilling
INSTALLATION
Š Minimum Cover Height
Š Distance Between Culverts
Š Watch Equipment Over Pipe
Š Proper Moisture Content
Š Even Support of Pipe & Risers – Slings
Š Floatation
QUESTION / ANSWERS
THANK YOU