TRADITIONAL WINDROW & TRENCH-FILL REVETMENTS, & A NEW INVENTION, VEGETATED TRENCH-FILL REVETMENT {All 3 are classified as “Setback Revetments”}

THESE ARE ALL SELF-ADJUSTING, SELF-HEALING BANK STABILIZATION METHODS (NOT FOUNDATION DEPENDENT) THAT ARE USUALLY BUILT OUTSIDE THE ACTIVE STREAM CHANNEL

Typically easy to construct & inspect Bank erosion must occur for the windrow or trenchfill stone to launch into the scoured area In-stream construction is avoided Self-adjusting, self-filtering stone is required Maximum scour depth must be calculated to to determine volume of stone required. Rule of thumb is 1 ton of stone per foot will stabilize 3 ft of scour. Works best in easily eroded, non-cohesive soils exhibiting a uniform erosion rate throughout the entire bend Can be quickly & easily constructed, comparatively inexpensive, easy to inspect. Since all work is outside the channel & above OHW, some permits might not be required! Read

WINDROW REVETMENTS A continuous volume of stone placed on an engineered alignment landward of an actively eroding riverbank or streambank.

WINDROW (SET-BACK) REVETMENT

WINDROW REVETMENT, KANSAS RIVER, EUDORA BEND, KS. Approx WINDROW REVETMENT, KANSAS RIVER, EUDORA BEND, KS. Approx. half of the stone has launched, remainder is still on top bank. Bank stable & vegged.

TRADITIONAL TRENCH-FILL REVETMENTS

TRENCH-FILL REVETMENT Calculated volume of stone placed in a trench on an engineered alignment landward of an eroding bank. As erosion undermines the trench, stone is designed to self-adjust (launch) into the scoured area forming a stable, adjustable toe (or toe & mid-bank protection, depending on bank height & depth of trench). In some projects the upper bank is graded & either vegetated or riprapped. Read

From Freddie Pinkard COE, Vicksburg District, modified by DLD Trenchfill Revetment Excavated Trench Upper bank riprap Disposal Active Eroding Bank Well Graded stone in trench Migrating Channel Initial Channel Cross-Section From Freddie Pinkard COE, Vicksburg District, modified by DLD

Trenchfill Revetment Upper bank riprap Final Channel Cross-section Eroding Bank Launched stone stabilized eroded sections of bank (toe & mid bank) Initial Channel Cross-section From Freddie Pinkard COE, Vicksburg District, modified by DLD

TRENCHFILL REVETMENT, RED RIVER, LA TRENCHFILL REVETMENT, RED RIVER, LA. Designed to provide the correct alignment & bend radii needed for navigation.

Red River, LA. -Trenchfill with upper bank paving Red River, LA.-Trenchfill with upper bank paving. Foreshore almost completely eroded back to the trenchfill stone & weighted toe

TRENCHFILL REVETMENT detail drawings from John McCullah’s www.E-SenSS.com

TRENCHFILL REVETMENT-Stone is on the wrong side of the trench (away from river). When erosion undermines the trench as much stone as possible needs to be launched immediately, not a few stones at a time!

A NEW IDEA, VEGETATED TRENCH-FILL REVETMENTS

A DAVE DERRICK DISCOVERY (DDD)

While 3 projects have been designed using this idea, only one has been built (recently).

VEGETATED TRENCH-FILL REVETMENTS-STEPS IN CONSTRUCTION RIVER SIDE

VEGETATED TRENCH-FILL REVETMENTS-Steps in construction Land Side River side

VEGETATED TRENCH-FILL REVETMENTS-Steps in construction Land Side River side

VEGETATED TRENCH-FILL REVETMENTS-STEPS IN CONSTRUCTION - COMPLETE Vegetation on backslope protected from river forces allowing for great growth VEGETATED TRENCH-FILL REVETMENTS-STEPS IN CONSTRUCTION - COMPLETE RIVER SIDE Land Side DONE

VEGETATED TRENCH-FILL REVETMENTS – ALL CONSTRUCTION STEPS River side VEGETATED TRENCH-FILL REVETMENTS – ALL CONSTRUCTION STEPS River side

CASE STUDY: & LAKE ECOSYSTEM RESTORATION EFFORT PROJECT CONSTRUCTED Oct ??, - Nov. ??, 2014

THE BACKSTORY Since the pipeline protection project is totally off of the pipeline right-of-way, the use of several different shrub & tree bioengineering techniques can be used in conjunction with a continuous low-elevation stone toe protection & a set of redirective Bendway Weirs. “Based on the interagency publication, Stream Corridor Restoration: Principles, Processes, and Practices, this introductory training covers: Stream corridor ecosystems and their components Ecological processes, structure & functions Characterization and analysis of stream corridors Development of a restoration plan Design, implementation, monitoring, and Integrated, iterative, adaptive, flexible approaches”.

AERIAL PHOTOS

AERIAL PHOTO-Flow x to x. AERIAL PHOTO-Provided by x, Dated x-x-2014

PRE-PROJECT PHOTOS by Dave Derrick Jul. xx, 2014 (One year before construction started)

PRE-PROJECT-Looking US @ . PRE-PROJECT-DEMO PROJ-WALNUT CR.-CLIVE IA.-DERRICK x-x-2014

THE PLAN

THE PLAN

CONSTRUCTION PHOTOS by Dave Derrick Oct. xx, 2014

CONSTRUCTION-Looking US @ . “Based on the interagency publication, Stream Corridor Restoration: Principles, Processes, and Practices, this introductory training covers: Stream corridor ecosystems and their components Ecological processes, structure & functions Characterization and analysis of stream corridors Development of a restoration plan Design, implementation, monitoring, and Integrated, iterative, adaptive, flexible approaches”. CONSTRUCTION-WHITE RIVER @ XXX. PIX DON GRESS x-xx-2014

This PowerPoint presentation was developed & built by Dave Derrick This PowerPoint presentation was developed & built by Dave Derrick. Any questions or comments, call my personal cell @ 601-218-7717, or email @ d_derrick@r2d-eng.com Enjoy the information!! “Based on the interagency publication, Stream Corridor Restoration: Principles, Processes, and Practices, this introductory training covers: Stream corridor ecosystems and their components Ecological processes, structure & functions Characterization and analysis of stream corridors Development of a restoration plan Design, implementation, monitoring, and Integrated, iterative, adaptive, flexible approaches”.

This chair fits me!!!

Courtesy Freddie Pinkard, Corps of Engineers, Vicksburg District Trenchfill Revetment Trenchfill Revetment – standard stone armor revetment with a massive stone toe, usually constructed in an excavated trench landward of the existing river bank, in anticipation that the river will complete the work by eroding to the revetment, causing the stone toe to launch down and armor the subaqueous bank slope. Courtesy Freddie Pinkard, Corps of Engineers, Vicksburg District

Courtesy Freddie Pinkard, Corps of Engineers, Vicksburg District Trenchfill Revetment Excavated Trench Eroding Bank Well- Graded Stone Initial Channel Section Migrating Channel Courtesy Freddie Pinkard, Corps of Engineers, Vicksburg District

Courtesy Freddie Pinkard, Corps of Engineers, Vicksburg District Trenchfill Revetment Red River Waterway Courtesy Freddie Pinkard, Corps of Engineers, Vicksburg District