APPENDIX 1 Structure Diagrams Conceptual 122122.pdf

Formidable Multi-Faceted Large Wood Complex

1 1

Plan View

Terrace

3 & 4

Direction of Flow

NOTES: 1) Excavate toe log trenches perpendicular to flow and into bank below bed surface at maximum predicted scour depth. Place toe logs up to stream bed elevation. 2) Excavate torsion Log trenches angled 15 - 20% to flow down to bed surface/toe log elevation. Place torsion log on top of toe log out into stream channel. 3) Place tree with rootwad in torsion trench hooking the on top of torsion log with the rootwad. 4) Continue alternating toe and torsion log placement, tapering the structure elevation up toward bank/terrace. Final log placements should exceed the Q100 elevation. 5) Place/ weave additional trees, logs, large boulders, slash or root-wads in apex of structure. 6) Place ample slash and small woody debris on the up-stream bank interface of the structure.

South Fork Skanâxheen Creek Restoration Project Tongass National Forest

STRUCTURE: FMF Complex – Plan View DESIGN: Brian Bair DRAWN BY: Brian Bair

DATE: 03/17/2010

REVIEWED: H. Whitacre Date: 12/2022

FMF Formidable Multi-faceted Terrace Barbs

Plan View

3 & 4

Constructed Terrace

NOTES:

Direction of Flow

1) Excavate toe log trenches perpendicular to flow and into bank below bed surface at maximum predicted scour depth. Place toe logs up to stream bed elevation. 2) Excavate torsion Log trenches angled 15 - 20% to flow down to bed surface/toe log elevation. Place torsion log on top of toe log out into stream channel. 3) Place tree with rootwad in torsion trench hooking the on top of torsion log with the rootwad. 4) Continue alternating toe and torsion log placement, tapering the structure elevation up toward bank/terrace. Final log placements should exceed the Q100 elevation. 5) Place/ weave additional trees, logs, large boulders, slash or root-wads in apex of structure. 6) Place ample slash and small woody debris on the up-stream bank interface of the structure.

South Fork Skanâxheen Creek Restoration Project Tongass National Forest

STRUCTURE: FMF Terrace Barbs -Plan View DESIGN: Brian Bair DRAWN BY: Brian Bair

Formidable Multi-Faceted Large Wood Complexes & Terrace Barbs Cross-Section View

Direction of Flow

Bank / Terrace

Q 100 Discharge Elevation 2

Gravel Bar

Q 1.2 Discharge Elevation

Stream Bed

Maximum Predicted Scour Depth 1

NOTES:

1) Excavate toe log trenches perpendicular to flow and into bank below bed surface at maximum predicted scour depth. Place toe logs up to stream bed elevation. 2) Excavate torsion Log trenches angled 15 - 20% to flow down to bed surface/toe log elevation. Place torsion log on top of toe log out into stream channel. 3) Place tree with rootwad in torsion trench hooking the on top of torsion log with the rootwad. 4) Continue alternating toe and torsion log placement, tapering the structure elevation up toward bank/terrace. Final log placements should exceed the Q100 elevation. 5) Place/ weave additional trees, logs, large boulders, slash or root-wads in apex of structure. 6) Place ample slash and small woody debris on the up-stream bank interface of the structure.

South Fork Skanâxheen Creek Restoration Project Tongass National Forest

STRUCTURE: FMF – X-Section View DESIGN: Brian Bair DRAWN BY: Brian Bair

Bar Structure - Bar Buddies 2 Plan View

Direction of Flow

1 4 4 3

Island

5 4 2

NOTES:

Direction of Flow

South Fork Skanâxheen Creek Restoration Project Tongass National Forest

STRUCTURE: Bar Buddy– Plan View DESIGN: Brian Bair DRAWN BY: Brian Bair

DATE: 03/17/2010

REVIEWED: H. Whitacre Date: 12/2022

1) Excavate and place toe/rack logs perpendicular to flow, below predicted maximum scour depth. 2) Excavate and place sound trees with rootwads or drive pilings to predicted maximum scour depth behind toe/rack logs. 3) Place, Integrate/interlock backer logs with toe/rack logs, and pilings. Backer/toe logs are placed in lifts, covered with cobble and gravel and then bucket compacted with the excavator. 4) Place trees with intact root wads on top of and bracing the upper most toe log, root wads facing up-stream. 5) Place ample slash and small woody debris on the up-stream interface of the structure.

Bar Buddies – Bar Structures Long-Section View

Slash/Stumps/Small Woody Debris 2

Q2-Q100 Discharge Elevation 5 2 4

Flow 4 2

Gravel Bar

NOTES:

Maximum Predicted Scour Depth South Fork Skanâxheen Creek

Restoration Project Tongass National Forest

STRUCTURE: Bar Buddy– Long-Sec View DESIGN: Brian Bair DRAWN BY: Brian Bair

DATE: 03/17/2010

REVIEWED: H. Whitacre Date: 12/2022 1) Excavate and place toe/rack logs perpendicular to flow, below predicted maximum scour depth. 2) Excavate and place sound trees with rootwads or drive pilings to predicted maximum scour depth behind toe/rack logs. 3) Place, Integrate/interlock backer logs with toe/rack logs, and pilings. Backer/toe logs are placed in lifts, covered with cobble and gravel and then bucket compacted with the excavator. 4) Place trees with intact root wads on top of and bracing the upper most toe log, root wads facing up-stream. 5) Place ample slash and small woody debris on the up-stream interface of the structure.