SUBMAR, INC.REVETMENT MATTRESS

SPECIFICATIONS

MATTRESS TYPE: REVETMENTMATTRESS DIMENSIONS: 8’ X 20’ X 4½”MATTRESS WEIGHT: AIR 6,200 LBS, UNDERWATER 3,600 LBSCONCRETE DENSITY: 145 LBS. PER CU. FT., 4,000 PSI160 ELEMENTS: 5/8” ULTRA VIOLET STABILIZED COPOLYMER EXTRUDEDFIBER ROPE, MINIMUM TENSILE STRENGTH 9,500 POUNDS

8”12”

38o

4½”

The Submar Revetment mat is used primarily for inland erosion control projects on shorelines, streams and rivers.

SUBMAR

MARSUB

The rope on the mat perimeter elements shall form lifting loops onall four sides of the mat. The rope shall be an ultra-violetstabilized copolymer extruded three strand fiber rope. Minimumtensile strength shall be 9,500 pounds. The rope shall have a goodto excellent resistance to concentrated acids, alkalis and solvents.The rope shall be impervious to rot, mildew, and degradation dueto marine organisms. The rope material shall not be affected bycontinuous immersion in salt water.

5/8”

Copolymer Extruded Fiber RopeMinimum breaking strength 9,500 lbs.

3/4”

Polypropylene Fiber RopeMinimum breaking strength 7,500 lbs.

Three Strand Fiber Rope

SUBMAR

8"12"

38o

4½"

Geotextile Fabric

Shoreline or Streambed Subgrade

½“ Gap between mats

Contact area between concrete andgeotextile fabric is 64 in2. The totalarea of block is 144 in2. Open areais 44% of total surface area, this areatends to fill in with sediment. This process allows revegetation on the mat.

INSTALLATION

SUB MAR

Cowskin Creek @ M.P. 263Sedgwick County, Wichita, KSSubmar Drawing No. AB1174

Before Installation

After Installation

During Installation

ConocoPhillips

REVEGETATION

South River near Conyers, GASB1878

During Construction

3 Yrs After Install

SUB MAR

SB1008

Rockhouse Creek near

Hohenwald, TN5 Years After Install

SB1008SUB MAR

Mill Creek

near

Grover, SCSB437

Dry Swamp Creek

Jones County, Laurel, MSSubmar Drawing No. AB1506

SUB MAR

Before Installation

During Installation

After Installation

4 Months After Installation 8 Months After Installation4 Years After Installation

Middle Oconee River

Before

2 Years After Install

Clarke County

Athens, GA

SB1717

2 Years After Installation

Unnamed DitchManatee County, FL

SB1613

Bucatunna Creek @ MP 774.55

Clarke Co., MS

During Installation

After Installation

Submar Drawing No. SB1026

SUB MAR

SUB MAR

ANR PipelineCompany

Arkabutla Creek @ M.P. 5670+56Panola County - Como, MS

Submar Drawing No. AB1138

Before Installation

During Installation

After Installation 3 Months After Installation

1½ Years After Installation

SUB MAR

North of Lambert Road @ MP 474.5

Fayette CountySomerville, Tennessee

Submar Drawing No. SB1558

BoBo BayouPanola County

nearMark, MS

AB1087

SUB MAR

SUB MAR

Gas Pipelines - Transco

Cedar Creek @ M.P. 777.33Clarke County, MS

SB1025

Before installation During Installation After InstallationAfter Construction

6 Years After Installation

SUB MAR

Before Installation Recoating the PipelineDuring Installation

After Installation

Senatobia Creek @ M.P. 345.36Tate County, Senatobia, Mississippi

Submar Drawing No. AB1089

2 Years After Installation

This site was matted bank to bank.Wetland vegetation has completely Covered the mats with no planting of Wetland plants. Natural revegetation.

GRADE CONTROL

HighwayBridge

Beaver Damor log jam

Pipeline

Pipeline

Grade ControlGrade control can be naturally occurring or manmade. Natural grade control could be a beaver dam, accumulated alluvialmaterial, woody debris jams, or naturally hard to erode bed material. Examples of manmade grade control are highway bridges, drop structures, dams, or pipelines. These hardened structures resist bed degradation and headcutting. Bed degradation and headcutting cause streams to deepen and widen. Erosion is the number one cause of pollution in the U. S.,according to EPA. Grade control plays an important role in stabilizing stream bed and banks, and preventing erosion.

Creekbed

Trees are an important part of the riparian corridor. The riparian corridor is the vegetated area along a stream. Trees stabilize the banks, provide shade for fish, and create wildlife habitat.

Grade Control

HighwayBridge

Beaver Damor log jam

Lowered Pipelines

Creekbed

Loss of grade control can be devastating to a stream. Lowering pipelines is potentially removing grade control from the stream. Removal of natural grade control such as beaver dams, or manmade structures can cause the streambed to degrade due to headcutting. Headcutting migrates upstream toward the source of water. As creek bed and banks degrade, trees become woody debris in the stream and the riparian corridor is damaged. Many riparian corridors are narrow due to land development. The loss of trees on the streambank means loss of habitat and an important part of streambank stability. Grade control plays an important role in stabilizing stream bed and banks, and preventing erosion.

Bed degradation will cause deepening and widening of a stream. An indicator of this is mature trees leaninginto the stream or trees and woody debris in the stream.Loss of stable vegetation on streambanks will acceleratethe erosion process.

Notice how the mats articulate down with the deepening streambed. This migrating headcut erosion has now been arrested by the hard armor mattress. In comparison, riprap would continually launch downstream and require future maintenance.

6” Manitowoc PipelineCreek Crossing @ Milepost 1.1

Manitowoc, Wisconsin

flow

flow

Several attempts to stabilize with Rip Rap

Difficult access made easy

Designed Energy Dissipation Pool

1 on 1 Bank Slope

SUB MAR

11 Months Later

Revegetation through open area of mats

2.5 Years Later

ANR PipelineCompany

West Little Sugar CreekEdgar Co., Elbridge, IL

SUB MAR

Before Installation

During Installation

After Installation

3 Months After InstallationLooking Upstream

Looking Downstream

Riprap is stable on banks but the rock in the creekbed washed downstream

West Little Sugar CreekEdgar Co., Elbridge, IL

SUB MAR

Rock accumulates downstream of exposed pipelineand causes bank erosion by diverting flow