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November 23, 2015 MARINE CONSTRUCTION No Comments

The purpose of a turbidity curtain is to provide sediment containment while construction activities are occurring in or directly adjacent to a waterway or waterbody.

Marine construction companies must be aware of applicable federal, state, and local laws, rules, regulations, or permit requirements governing the use and placement of silt curtains. A good resource is each State Department of Transportation, aka D.O.T.

Each State uses slightly different terminology when referring to turbidity curtains and types of curtains so it is important to know the subtle differences when communicating and submitting bids. The directory below points to each State DOT and specifies what terms are used for some of the States.

For a complete list or to receive your particular State turbidity curtain DOT design specifications, please contact us with the form below:

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50 States Department of Transportation Directory

Alabama

Alabama DOT Website

Alaska

Alaska DOT Website

Arizona

Arizona DOT Website

Arkansas

Arkansas DOT Website

California

California speaks in terms of Turbidity Curtain.

icon-pdf California DOT (Department of Transportation) Turbidity Curtain Design Standard

California DOT Website

Colorado

Colorado DOT Website

Connecticut

Like most States, Connecticut uses the language “Turbidity Curtain” but has its wording for curtain classifications, which is: Type I (Flat Water), Type II (Lightweight), Type III (Middleweight)and Type IV ( Heavyweight).

Connecticut DOT Website

Delaware

Delaware is the same as Oklahoma and uses the wording “Turbidity Curtain” and Type 1 , 2 and 3.

Delaware DOT Website

District Of Columbia

DC DOT Website

Florida

FDOT and the marine construction industry in Florida refer to the terms Floating Turbidity Barrier and Type I, Type II and Type III.

icon-pdf 2006 State of Florida DOT (Department of Transportation) Floating Turbidity Barrier Design Standard

icon-pdf 2010 FDOT Florida Turbidity Barrier Design Standard

Florida DOT Website

Georgia

Georgia DOT Website

Hawaii

Hawaii DOT Website

Idaho

Idaho DOT Website

Illinois

Illinois DOT Website

Indiana

Indiana DOT Website

Iowa

Iowa uses the wording Floating Silt Curtains to refer to turbidity curtains. Also instead of referring to Type I, II and III, that State uses Still Water and Moving Water.

Iowa DOT Website

Kansas

Kansas DOT Website

Kentucky

Kentucky DOT Website

Louisiana

Louisiana DOT Website

Maine

Maine DOT Website

Maryland

Maryland DOT Website

Massachusetts

Massachusetts DOT Website

Michigan

icon-pdf Michigan DOT (Department of Transportation) Turbidity Curtain Manual

Michigan DOT Website

Minnesota

Like North Dakota, Floating Silt Curtain / Silt Barrier are used to describe the product.

Minnesota DOT Website

Mississippi

This State follows the same terminology as Florida, ie. Floating Turbidity Barrier and Type I, Type II and Type III.

Mississippi DOT Website

Missouri

Missouri DOT Website

Montana

Montana DOT Website

Nebraska

Nebraska uses the terms Turbidity Barrier in their official documents to describe the erosion control practices during marine construction.

Nebraska DOT Website

Nevada

Nevada DOT Website

New Hampshire

New Hampshire DOT Website

New Jersey

Like Florida, the common terminology used in New Jersey is Floating Turbidity Barrier.

New Jersey DOT Website

New Mexico

New Mexico DOT Website

New York

In the State of New York, it is customary to refer to Turbidity Curtain.

icon-pdf New York DOT (Department of Transportation) Turbidity Barrier Design Standard

  • Min. grab tensile strength (ASTM-D 4632): 124 Lbs.

New York DOT Website

North Carolina

North Carolina DOT (Department of Transportation) Turbidity Barrier Design Standard

  • Fabric thickness:
  • Min. grab tensile strength: *md-370 lbs *cd-250 lbs
  • Apparent equivalent opening:  70 US standard sieve

* md – machine direction | * cd – cross machine direction

North Carolina DOT Website

North Dakota

Floating Silt Curtain / Silt Barrier are used along with the two classifications: Still Water, Moving Water.

North Dakota DOT Website

Ohio

Ohio DOT Website

Oklahoma

The wording “Turbidity Curtain” and Type 1 , 2 and 3 are used.

Oklahoma DOT Website

Oregon

Oregon DOT Website

Pennsylvania

Pennsylvania DOT Website

Rhode Island

Rhode Island DOT Website

South Carolina

The South Carolina Department of Transportation refers to the terms Floating Turbidity Barrier and Light DutyMedium Duty and Heavy Duty.

South Carolina DOT Website

South Dakota

South Dakota DOT Website

Tennessee

The Tennessee DOT and marine construction industry refer to the terms Floating Turbidity Curtain. However, unlike Florida, there is a subtle difference when it comes to specifying the type of curtain: Tennessee uses digits instead of Roman letters: Type 1, Type 2 and Type 3.

Tennessee DOT Website

Texas

Texas DOT Website

Utah

Utah DOT Website

Vermont

Vermont DOT Website

Virginia

The terms typically used in Virginia are Turbidity Curtain.

icon-pdf Virginia DOT (Department of Transportation) Erosion & Sediment Control Manual

Virginia DOT Website

Washington

Washington DOT Website

West Virginia

West Virginia DOT Website

Wisconsin

icon-pdf State of Wisconsin DOT (Department of Transportation) Turbidity Barrier Design Standard

  • Min. grab tensile strength (ASTM D 4632): 200 lb (890 N)

Wisconsin DOT Website

Wyoming

Wyoming DOT Website

 

Written by Luis Vargas