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

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Presentation on theme: "TRADITIONAL WINDROW & TRENCH-FILL REVETMENTS, & A NEW INVENTION, VEGETATED TRENCH-FILL REVETMENT {All 3 are classified as “Setback Revetments”}"— Presentation transcript:

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

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

3 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

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

5 WINDROW (SET-BACK) REVETMENT

6 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.

7 TRADITIONAL TRENCH-FILL REVETMENTS

8 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

9 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

10 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

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

12 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

13 TRENCHFILL REVETMENT detail drawings from John McCullah’s

14 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!

15 A NEW IDEA, VEGETATED TRENCH-FILL REVETMENTS

16 A DAVE DERRICK DISCOVERY (DDD)

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

18 VEGETATED TRENCH-FILL REVETMENTS-STEPS IN CONSTRUCTION
RIVER SIDE

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

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

21 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

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

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

24 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”.

25 AERIAL PHOTOS

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

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

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

29 THE PLAN

30 THE PLAN

31 CONSTRUCTION PHOTOS by Dave Derrick
Oct. xx, 2014

32 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 XXX. PIX DON GRESS x-xx-2014

33 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 , or 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”.

34 This chair fits me!!!

35 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

36 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

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


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