Bank Stabilization Work area Blocks 41, 42, 44, & 45
15
#6758 11/15/19 Pacific Habitat Services, Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, OR 97070 FIGURE 1 General Location and Topography Alamo Manhattan Bank Stabilization - Portland, Oregon United States Geological Survey (USGS) Lake Oswego, Oregon 7.5 quadrangle, 2017 (viewer.nationalmap.gov/basic) Blocks 41, 42, 44, & 45 Bank Stabilization Work area NWP-2019-494-1 Page 1 of 15 Encl 1
Transcript of Bank Stabilization Work area Blocks 41, 42, 44, & 45
Public Notice#6758 11/15/19
Pacific Habitat Services, Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, OR 97070
FIGURE
Alamo Manhattan Bank Stabilization - Portland, Oregon United States Geological Survey (USGS) Lake Oswego, Oregon 7.5 quadrangle, 2017
(viewer.nationalmap.gov/basic)
Bank Stabilization Work area
#6758 11/15/19
Pacific Habitat Services, Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, OR 97070
FIGURE
Blocks 41, 42, 44, & 45
Bank Stabilization Work area
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BASE ALIGNMENT PROFILE: STA 0+00 TO STA 3+50 Horiz. Scale: 1"=20' Vert. Scale: 1"=10'
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OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW
OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW
PROPOSED GREENWAY TRAIL ELEVATIONEXISTING
ORDINARY HIGH WATER (OHW)
TYPE 4 (TYP.)
TYPE 3 (TYP.)
TYPE 2 (TYP.)
TYPE 1 (TYP.)
EXISTING 1' CONTOUR
EXISTING 5' CONTOUR
ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
LEGEND
SOUTH WATERFRONT TOP OF BANK 2002 (PORTLAND GIS)
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
PROPERTY BOUNDARY
CITY OF PORTLAND DATUM)
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
WORK LIMIT FOR BANK STABILIZATION)
EXISTING WOOD PIER TO BE REMOVED
TRANSITION GRADING TO ADJACENT GREEN WAY AS SHOWN
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
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NOTES: 1. SEE FIGURE 5C AND 5D FOR BANK STABILIZATION PLAN
2. SEE FIGURE 5F FOR PILE REMOVAL DETAIL
3. SEE FIGURE 7F FOR BANK STABILIZATION DETAILS
4. SEE FIGURES 7A-7C FOR BANK SECTIONS.
Site Plan
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=60' Vert. Scale: 1"=30'
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BASE ALIGNMENT PROFILE: STA 3+50 TO STA 7+00 Horiz. Scale: 1"=20' Vert. Scale: 1"=10'
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OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW
ORDINARY HIGH WATER (OHW)
GROUND
TYPE 2 (TYP.)TYPE 1 (TYP.)
TYPE 4 (TYP.)
EXISTING 1' CONTOUR
EXISTING 5' CONTOUR
ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
LEGEND
6+89
WILLAMETTE RIVER
PS D
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
REMOVE WOOD PILE (TYP)
TIE INTO EXISTING GROUND
PROPERTY BOUNDARY
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
FUTURE GREENWAY TRAIL (BY OTHERS)
"BASE" ALIGNMENT SOUTH WATERFRONT TOP OF BANK 2002 (PORTLAND GIS)
EXISTING CONCRETE PIER TO REMAIN
FUTURE BUILDING (BY OTHERS)
ORDINARY LOW WATER (6.12' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
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Site Plan
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=60' Vert. Scale: 1"=30'
NOTES: 1. SEE FIGURE 5C AND 5D FOR BANK STABILIZATION PLAN
2. SEE FIGURE 5E FOR LARGE WOOD PLACEMENT DETAILS
3. SEE FIGURE 5F FOR PILE REMOVAL DETAIL
4. SEE FIGURE 7F FOR BANK STABILIZATION DETAILS
5. SEE FIGURES 7A-7C FOR BANK SECTIONS.
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Work Limit For Bank Stabilization
South Waterfront Top of Bank 2002 (Portland GIS)
Alcove Area Where Bank is 4:1 or Flatter be Preserved and Rip Rap Will Be Overlain With Clean Rock and Sediment
Proposed Retaining Wall and Fence
Pre-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Post-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Property Boundary
Sediment Fence
PROPOSED CONTOUR (5')
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
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OLW
OLW
Rip rap
Rip rap
(Typical)
Alcove Area Where Bank is 4:1 or Flatter be Preserved and Rip Rap Will Be Overlain With Clean Rock and Sediment
Work Limit For Bank Stabilization
South Waterfront Top of Bank 2002 (Portland GIS)
Post-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Pre-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Work Limit For Bank Stabilization
Future Greenway Trail
PROPOSED CONTOUR (5')
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
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BURIED LOG
CONST. NOTE
ATTACHED?
LENGTH) BURIED
1 1 18-24 24 YES 66% 3.0 DOWN
2 1 18-24 24 YES 60% 3.5 UP
3 1 18-24 24 YES 80% 1.0 DOWN
4 1 18-24 24 YES 73% 5.5 DOWN
5 1 18-24 24 YES 78% 3.0 DOWN
6 1 18-24 24 YES 85% 3.0 DOWN
TYPE 3 CONSTRUCTION SEQUENCING: PLACE KEY LOG AT ANGLE AND ELEVATION SPECIFIED ON FIGURE 5F, WITH TILT ANGLE AND BURIAL AS SPECIFIED.
PLACE SECOND LOG AT AN 18 DEGREE ANGLE WITH THE KEY LOG SUCH THAT THE TWO ROOTWADS BARELY OVERLAP (6 FEET ON CENTER). TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED.
PLACE THIRD LOG SUCH THAT ROOTWADS 2 & 3 OVERLAP BY 1' AND FORM A 150 DEGREE ANGLE AT THEIR FACES. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE FOURTH LOG SUCH THAT THE ROOTWAD FACE OVERLAPS WITH THE ROOTWAD OF LOG 2 AND THE STEM RESTS ON LOG 2. LOG 4 SHALL BE PERPENDICULAR TO THE SLOPE AND INSTALLED AT THE TILT ANGLE AND BURIAL AS SPECIFIED. PLACE FIFTH LOG SPACED 4 FT DOWNSTREAM OF LOG 4, SIMILARLY ORIENTED WITH THE BANK. LOG 5 RESTS ON LOG 2 AND IS APPROXIMATELY 6.5 FT FROM ROOTWAD COLLAR OF LOG 2. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE SIXTH LOG SPACED 9.5 FT DOWNSTREAM OF LOG 5, ALSO ROUGHLY PERPENDICULAR TO THE BANK. THE STEM OF LOG 6 (8.5 FT FROM ROOTWAD COLLAR) SHALL REST ON LOG 2, APPROXIMATELY 18.5 FT FROM THE ROOTWAD COLLAR OF LOG 2. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED.
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QUANTITY (EA) DBH (IN) LENGTH (FT) ROOTWAD
ATTACHED?
LENGTH) BURIED
1 1 18-24 24 YES 60% 2.0 DOWN
2 1 18-24 24 YES 55% 2.0 DOWN
3 1 18-24 24 YES 50% 0-2.0 DOWN
TYPE 2 CONSTRUCTION SEQUENCING: PLACE KEY LOG AT ANGLE AND ELEVATION SPECIFIED ON SHEET C3.2, WITH TILT ANGLE AND BURIAL AS SPECIFIED.
PLACE SECOND LOG SPACED SUCH THAT ITS ROOTWAD BARELY OVERLAPS WITH KEY LOG ROOTWAD (APPROXIMATELY 6 FT DOWNSTREAM ON CENTER). PLACE AT AN ELEVATION SUCH THAT CROWN OF ROOT COLLAR IS AT OR SLIGHTLY ABOVE ELEVATION OF KEY LOG ROOT COLLAR CROWN.
PLACE THIRD LOG AT A 40 DEGREE ANGLE WITH THE KEY LOG, POINTING UPSTREAM. TILT ANGLE OF THE THIRD LOG SHOULD BE FLAT OR SLIGHTLY DOWN-ANGLE.
1
2
3
TYPE 3 LARGE WOOD STRUCTURE3 NOT TO SCALE
TYPE 2 LARGE WOOD STRUCTURE2 NOT TO SCALE TYPE 1 LARGE WOOD STRUCTURE1 NOT TO SCALE
TYPE 1 CONSTRUCTION SEQUENCING: PLACE LOG AT ANGLE AND ELEVATION SPECIFIED ON SHEET C3.2. LOGS SHALL BE INSTALLED FLAT OR AT A TILT ANGLE UP TO 2 DEGREES. LOGS PLACED AT TOE OF BANK-LEVEL MAY BE INSTALLED SUCH THAT UP TO 6 FT OF STEM IS EXPOSED. LOGS ABOVE THE TOE OF BANK BUT BELOW 10 FT MAY HAVE EXPOSED STEM UP TO 2 FT. LOGS INSTALLED ABOVE THE 10 FT ELEVATION SHOULD HAVE EXPOSED STEM 0.5-1FT MAXIMUM, DECREASING AS ELEVATION INCREASES.
1
QUANTITY (EA) DBH (IN) LENGTH
(FT) ROOTWAD
LENGTH) BURIED
1 1 18-24 24 YES 55% 0-2 DOWN
1 1
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KEY LOG LOCATION GIVEN ON FIGURE 5F AT CROWN OF ROOTWAD COLLAR
KEY LOG LOCATION GIVEN ON FIGURE 5F AT CROWN OF ROOTWAD COLLAR
FLOWFLOW
KEY LOG LOCATION GIVEN ON FIGURE 5F AT CROWN OF
ROOTWAD COLLAR
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Sections Provided by OTAK, Inc.
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KEY LOG LOCATION AND ORIENTATION STRUCTURE
TYPE
CONST. NOTE
ATTACHED? MIN. PERCENT OF
LOG BURIED STEM TILT
1 1 18-24 24 YES 55% 2.0 DOWN
2 1 18-24 30 NO 20% 5.0 DOWN
3 1 18-24 24 YES 50% 7.0 DOWN
4 1 18-24 24 YES 50% 5.0 DOWN
5 1 18-24 24 YES 65% 2.0 DOWN
TYPE 4 CONSTRUCTION SEQUENCING: PLACE KEY LOG AT ANGLE AND ELEVATION SPECIFIED ON THIS SHEET, WITH TILT ANGLE AND BURIAL AS SPECIFIED. PLACE SECOND LOG AT A 20 DEGREE ANGLE WITH THE BANK FACE (40 DEGREES WITH RESPECT TO LOG 1 ROOTWAD), WITH THE UPSTREAM END RESTING ON THE ROOT COLLAR OF LOG 1. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE THIRD LOG SUCH THAT THE ROOT COLLAR OF THE LOG RESTS ON LOG 2, 7 FT FROM THE UPSTREAM END. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE FOURTH LOG SUCH THAT THE ROOT COLLAR OF THE LOG RESTS ON LOG 2, 12 FT FROM THE UPSTREAM END. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE FIFTH LOG SUCH THAT THE ROOT COLLAR OF THE LOG RESTS ON LOG 2, JUST UPSTREAM OF THE BURIAL POINT (18 FEET FROM UPSTREAM END). TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED.
FILL GAP BETWEEN BOTTOM OF LOG 2 AND SLOPE WITH CLASS 700 RIP RAP AND ROUNDED RIVER ROCK (APPROX. 2 CY, 1.5 FT DEEP). FILL VOIDS UP TO LOG CROWNS WITH SOIL AND PLANT PER LANDSCAPING PLAN.
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LARGE WOOD MATERIAL SCHEDULE
TOTAL 100
ROOTWAD COLLAR FLOW
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Sections Provided by OTAK, Inc.
USE THE FOLLOWING STEPS TO MINIMIZE CREOSOTE RELEASE, SEDIMENT DISTURBANCE, AND TOTAL SUSPENDED SOLIDS:
1. INSTALL A FLOATING SURFACE BOOM TO CAPTURE FLOATING SURFACE DEBRIS. 2. KEEP ALL EQUIPMENT (E.G., BUCKET, STEEL CABLE, VIBRATORY HAMMER) OUT OF THE WATER, GRIP PILES ABOVE THE
WATERLINE, AND COMPLETE ALL WORK DURING LOW WATER AND LOW CURRENT CONDITIONS. 3. DISLODGE THE PILING WITH A VIBRATORY HAMMER, WHENEVER FEASIBLE--NEVER INTENTIONALLY BREAK A PILE BY
TWISTING OR BENDING. 4. SLOWLY LIFT THE PILE FROM THE SEDIMENT AND THROUGH THE WATER COLUMN. 5. PLACE THE PILE IN A CONTAINMENT BASIN ON A BARGE DECK, PIER, OR SHORELINE WITHOUT ATTEMPTING TO CLEAN OR
REMOVE ANY ADHERING SEDIMENT (A CONTAINMENT BASIN FOR THE REMOVED PILES AND ANY ADHERING SEDIMENT MAY BE CONSTRUCTED OF DURABLE PLASTIC SHEETING WITH SIDEWALLS SUPPORTED BY HAY BALES OR ANOTHER SUPPORT STRUCTURE TO CONTAIN ALL SEDIMENT, AND RETURN FLOW MAY BE DIRECTED BACK TO THE WATERWAY).
6. FILL THE HOLES LEFT BY EACH PILING WITH CLEAN, NATIVE SEDIMENTS. 7. DISPOSE OF ALL REMOVED PILES, FLOATING SURFACE DEBRIS, ANY SEDIMENT SPILLED ON WORK SURFACES, AND ALL
CONTAINMENT SUPPLIES AT A PERMITTED UPLAND DISPOSAL SITE.
IF PILE CAN NOT BE REMOVED BY PULLING FOLLOW DETAIL 1. INSTALL STEEL CASING BELOW MUDLINE, MIN 3FT or REFUSAL 2. ROTATE CASING TO SNAP PILE OFF BELOW MUDLINE 3. TRANSPORT PILE IN CASING TO DISPOSAL AREA 4. DISPOSE PILE IN ACCORDANCE TO ALL STATE AND FEDERAL REGULATIONS 5. BACKFILL HOLE WITH CLEAN SAND OR MATERIALS AS SHOWN ON PLANS 6. IF PILE IS NOT FULLY REMOVED MARK REMNANT ON SHEETS C2.0 AND C2.1 AND PROVIDE TO ENGINEER OF RECORD
PILE REMOVAL DETAIL1 NOT TO SCALE
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EXISTING CONTOUR
PROPOSED CONTOUR
ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
PROPERTY BOUNDARY / TAX LOT
REMOVED WOOD PILE (TYP)
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
FUTURE BUILDING (BY OTHERS)
PROPERTY BOUNDARY
TRANSITION GRADING TO ADJACENT GREEN WAY AS SHOWN
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
21
ORDINARY LOW WATER (6.12' ELEVATION
CITY OF PORTLAND DATUM)
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
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Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
NOTE: BANK SECTIONS ARE SHOWN ON FIGURES 7C-7E
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ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
PROPERTY BOUNDARY / TAX LOT
"BASE" ALIGNMENT
FUTURE BUILDING (BY OTHERS)
LIMIT OF PROPOSED BANK REGRADING SEE TYPICAL SECTION SEET C3.0
TYPE 1 (TYP.) LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
WORK LIMIT FOR BANK STABILIZATION
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
SOUTH WATERFRONT TOP OF BANK 2002 (PORTLAND GIS)
ORDINARY LOW WATER (6.12' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
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BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
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Grading Plan (South) and Cross Section Locations
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
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EDGE OF TRAIL
EDGE OF TRAIL
BASE ALIGNMENT SECTION: STA 0+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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LIMIT OF PROPOSED BANK GRADING LIMIT OF PROPOSED
BANK GRADING
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
ACTUAL 4.2:1
ACTUAL 4.4:1
ACTUAL 3.1:1
ACTUAL 4.0:1
ACTUAL 2.3:1
ACTUAL 3.3:1
ACTUAL 3.6:1
ACTUAL 2.2:1
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR
FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION
SLOPES 2H:1V OR FLATTER
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
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60
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ACTUAL 2.3:1
ACTUAL 3.0:1
ACTUAL 2.9:1
ACTUAL 3.0:1
ACTUAL 2.3:1
ACTUAL 3.4:1
BANK STABILIZATION
SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND,
EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
WORK LIMIT
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
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PROPOSED GROUND
EXISTING GROUND
BANK GRADING
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
ACTUAL 3.2:1
ACTUAL 3.1:1
ACTUAL 2.1:1
ACTUAL 3.5:1
ACTUAL 3.2:1
ACTUAL 2.2:1
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
WORK LIMIT WORK LIMIT
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
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BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 0+80 to 1+15, 3+70 to 4+00 NOT TO SCALE
MAX 2:1
FUTURE GREENWAY
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
LIMIIT OF BANK STABILIZATION AT ELEV. 0
EXISTING GROUND
PROPOSED GROUND
EXISTING SLOPE
1'
3'
SEPARATION GEOTEXTILE
EXISTING SLOPES 2H:1V OR FLATTER
LIMIT OF PROPOSED BANK RE-GRADING
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURES 5C AND 5D.
BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 1+15 to 3+70 NOT TO SCALE
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
LIMIT OF PROPOSED BANK RE-GRADING
EXISTING GROUND
PROPOSED GROUND
EXISTING SLOPE
FUTURE GREENWAY
1'-6" FILTER BLANKET
OHW ELEV. 18.22 FT
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURES 5C AND 5D.
6" to 2" RIVER ROCK
SEPARATION GEOTEXTILE
EXISTING SLOPES 2H:1V OR FLATTER
LIMIT OF PROPOSED BANK RE-GRADING
LIMIIT OF BANK STABILIZATION AT ELEV. 0
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
EXISTING GROUND
PROPOSED GROUND
BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 0+00 to 0+80, 4+00 to 4+20 NOT TO SCALE
FUTURE GREENWAY
2.5" to 0" WELL GRADED ROUNDED ROCK AT ALCOVE AREAS
1'-6" FILTER BLANKET
CLASS 700 RIPRAP
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURES 5C AND 5D.
SEPARATION GEOTEXTILE
MAX 3:1
MATCH EXISTING GROUND EXISTING SLOPES 4H:V1 OR FLATTER
OHW ELEV. 18.22LIMIT OF PROPOSED BANK RE-GRADING
MAX 2:1
1.5'
3'
6" TO 2" RIVER ROCK
BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 4+20 to 5+30 NOT TO SCALE
FUTURE GREENWAY
2.5" to 0" WELL GRADED ROUNDED ROCK AT ALCOVE AREAS
ALCOVE AREA: BANK STABILIZATION TO
MATCH EXISTING GROUND EXISTING SLOPES 4H:V1 OR FLATTER
LIMIT OF PROPOSED BANK RE-GRADING
MAX 3:1
MAX 2:1
EXISTING GROUND
PROPOSED GROUND
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
1'-6" FILTER BLANKET
CLASS 700 RIPRAP
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURE 5C AND 5D.
SEPARATION GEOTEXTILE1.5'
1 2
Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Pacific Habitat Services, Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, OR 97070
FIGURE
Alamo Manhattan Bank Stabilization - Portland, Oregon United States Geological Survey (USGS) Lake Oswego, Oregon 7.5 quadrangle, 2017
(viewer.nationalmap.gov/basic)
Bank Stabilization Work area
#6758 11/15/19
Pacific Habitat Services, Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, OR 97070
FIGURE
Blocks 41, 42, 44, & 45
Bank Stabilization Work area
31
32
32
32
0
5
10
15
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OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW
OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW
PROPOSED GREENWAY TRAIL ELEVATIONEXISTING
ORDINARY HIGH WATER (OHW)
TYPE 4 (TYP.)
TYPE 3 (TYP.)
TYPE 2 (TYP.)
TYPE 1 (TYP.)
EXISTING 1' CONTOUR
EXISTING 5' CONTOUR
ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
LEGEND
SOUTH WATERFRONT TOP OF BANK 2002 (PORTLAND GIS)
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
PROPERTY BOUNDARY
CITY OF PORTLAND DATUM)
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
WORK LIMIT FOR BANK STABILIZATION)
EXISTING WOOD PIER TO BE REMOVED
TRANSITION GRADING TO ADJACENT GREEN WAY AS SHOWN
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
M AT
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NOTES: 1. SEE FIGURE 5C AND 5D FOR BANK STABILIZATION PLAN
2. SEE FIGURE 5F FOR PILE REMOVAL DETAIL
3. SEE FIGURE 7F FOR BANK STABILIZATION DETAILS
4. SEE FIGURES 7A-7C FOR BANK SECTIONS.
Site Plan
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=60' Vert. Scale: 1"=30'
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OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW OHW
OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW OLW
ORDINARY HIGH WATER (OHW)
GROUND
TYPE 2 (TYP.)TYPE 1 (TYP.)
TYPE 4 (TYP.)
EXISTING 1' CONTOUR
EXISTING 5' CONTOUR
ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
LEGEND
6+89
WILLAMETTE RIVER
PS D
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
REMOVE WOOD PILE (TYP)
TIE INTO EXISTING GROUND
PROPERTY BOUNDARY
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
FUTURE GREENWAY TRAIL (BY OTHERS)
"BASE" ALIGNMENT SOUTH WATERFRONT TOP OF BANK 2002 (PORTLAND GIS)
EXISTING CONCRETE PIER TO REMAIN
FUTURE BUILDING (BY OTHERS)
ORDINARY LOW WATER (6.12' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
M AT
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Site Plan
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=60' Vert. Scale: 1"=30'
NOTES: 1. SEE FIGURE 5C AND 5D FOR BANK STABILIZATION PLAN
2. SEE FIGURE 5E FOR LARGE WOOD PLACEMENT DETAILS
3. SEE FIGURE 5F FOR PILE REMOVAL DETAIL
4. SEE FIGURE 7F FOR BANK STABILIZATION DETAILS
5. SEE FIGURES 7A-7C FOR BANK SECTIONS.
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Work Limit For Bank Stabilization
South Waterfront Top of Bank 2002 (Portland GIS)
Alcove Area Where Bank is 4:1 or Flatter be Preserved and Rip Rap Will Be Overlain With Clean Rock and Sediment
Proposed Retaining Wall and Fence
Pre-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Post-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Property Boundary
Sediment Fence
PROPOSED CONTOUR (5')
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
M AT
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5D
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OLW
OLW
Rip rap
Rip rap
(Typical)
Alcove Area Where Bank is 4:1 or Flatter be Preserved and Rip Rap Will Be Overlain With Clean Rock and Sediment
Work Limit For Bank Stabilization
South Waterfront Top of Bank 2002 (Portland GIS)
Post-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Pre-Project Ordinary High Water (18.22' Elevation City of Portland Datum)
Work Limit For Bank Stabilization
Future Greenway Trail
PROPOSED CONTOUR (5')
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
M AT
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5C
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BURIED LOG
CONST. NOTE
ATTACHED?
LENGTH) BURIED
1 1 18-24 24 YES 66% 3.0 DOWN
2 1 18-24 24 YES 60% 3.5 UP
3 1 18-24 24 YES 80% 1.0 DOWN
4 1 18-24 24 YES 73% 5.5 DOWN
5 1 18-24 24 YES 78% 3.0 DOWN
6 1 18-24 24 YES 85% 3.0 DOWN
TYPE 3 CONSTRUCTION SEQUENCING: PLACE KEY LOG AT ANGLE AND ELEVATION SPECIFIED ON FIGURE 5F, WITH TILT ANGLE AND BURIAL AS SPECIFIED.
PLACE SECOND LOG AT AN 18 DEGREE ANGLE WITH THE KEY LOG SUCH THAT THE TWO ROOTWADS BARELY OVERLAP (6 FEET ON CENTER). TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED.
PLACE THIRD LOG SUCH THAT ROOTWADS 2 & 3 OVERLAP BY 1' AND FORM A 150 DEGREE ANGLE AT THEIR FACES. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE FOURTH LOG SUCH THAT THE ROOTWAD FACE OVERLAPS WITH THE ROOTWAD OF LOG 2 AND THE STEM RESTS ON LOG 2. LOG 4 SHALL BE PERPENDICULAR TO THE SLOPE AND INSTALLED AT THE TILT ANGLE AND BURIAL AS SPECIFIED. PLACE FIFTH LOG SPACED 4 FT DOWNSTREAM OF LOG 4, SIMILARLY ORIENTED WITH THE BANK. LOG 5 RESTS ON LOG 2 AND IS APPROXIMATELY 6.5 FT FROM ROOTWAD COLLAR OF LOG 2. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE SIXTH LOG SPACED 9.5 FT DOWNSTREAM OF LOG 5, ALSO ROUGHLY PERPENDICULAR TO THE BANK. THE STEM OF LOG 6 (8.5 FT FROM ROOTWAD COLLAR) SHALL REST ON LOG 2, APPROXIMATELY 18.5 FT FROM THE ROOTWAD COLLAR OF LOG 2. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED.
1
2
3
4
5
6
QUANTITY (EA) DBH (IN) LENGTH (FT) ROOTWAD
ATTACHED?
LENGTH) BURIED
1 1 18-24 24 YES 60% 2.0 DOWN
2 1 18-24 24 YES 55% 2.0 DOWN
3 1 18-24 24 YES 50% 0-2.0 DOWN
TYPE 2 CONSTRUCTION SEQUENCING: PLACE KEY LOG AT ANGLE AND ELEVATION SPECIFIED ON SHEET C3.2, WITH TILT ANGLE AND BURIAL AS SPECIFIED.
PLACE SECOND LOG SPACED SUCH THAT ITS ROOTWAD BARELY OVERLAPS WITH KEY LOG ROOTWAD (APPROXIMATELY 6 FT DOWNSTREAM ON CENTER). PLACE AT AN ELEVATION SUCH THAT CROWN OF ROOT COLLAR IS AT OR SLIGHTLY ABOVE ELEVATION OF KEY LOG ROOT COLLAR CROWN.
PLACE THIRD LOG AT A 40 DEGREE ANGLE WITH THE KEY LOG, POINTING UPSTREAM. TILT ANGLE OF THE THIRD LOG SHOULD BE FLAT OR SLIGHTLY DOWN-ANGLE.
1
2
3
TYPE 3 LARGE WOOD STRUCTURE3 NOT TO SCALE
TYPE 2 LARGE WOOD STRUCTURE2 NOT TO SCALE TYPE 1 LARGE WOOD STRUCTURE1 NOT TO SCALE
TYPE 1 CONSTRUCTION SEQUENCING: PLACE LOG AT ANGLE AND ELEVATION SPECIFIED ON SHEET C3.2. LOGS SHALL BE INSTALLED FLAT OR AT A TILT ANGLE UP TO 2 DEGREES. LOGS PLACED AT TOE OF BANK-LEVEL MAY BE INSTALLED SUCH THAT UP TO 6 FT OF STEM IS EXPOSED. LOGS ABOVE THE TOE OF BANK BUT BELOW 10 FT MAY HAVE EXPOSED STEM UP TO 2 FT. LOGS INSTALLED ABOVE THE 10 FT ELEVATION SHOULD HAVE EXPOSED STEM 0.5-1FT MAXIMUM, DECREASING AS ELEVATION INCREASES.
1
QUANTITY (EA) DBH (IN) LENGTH
(FT) ROOTWAD
LENGTH) BURIED
1 1 18-24 24 YES 55% 0-2 DOWN
1 1
3
2
3
4
5
2
1
6
KEY LOG LOCATION GIVEN ON FIGURE 5F AT CROWN OF ROOTWAD COLLAR
KEY LOG LOCATION GIVEN ON FIGURE 5F AT CROWN OF ROOTWAD COLLAR
FLOWFLOW
KEY LOG LOCATION GIVEN ON FIGURE 5F AT CROWN OF
ROOTWAD COLLAR
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Sections Provided by OTAK, Inc.
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KEY LOG LOCATION AND ORIENTATION STRUCTURE
TYPE
CONST. NOTE
ATTACHED? MIN. PERCENT OF
LOG BURIED STEM TILT
1 1 18-24 24 YES 55% 2.0 DOWN
2 1 18-24 30 NO 20% 5.0 DOWN
3 1 18-24 24 YES 50% 7.0 DOWN
4 1 18-24 24 YES 50% 5.0 DOWN
5 1 18-24 24 YES 65% 2.0 DOWN
TYPE 4 CONSTRUCTION SEQUENCING: PLACE KEY LOG AT ANGLE AND ELEVATION SPECIFIED ON THIS SHEET, WITH TILT ANGLE AND BURIAL AS SPECIFIED. PLACE SECOND LOG AT A 20 DEGREE ANGLE WITH THE BANK FACE (40 DEGREES WITH RESPECT TO LOG 1 ROOTWAD), WITH THE UPSTREAM END RESTING ON THE ROOT COLLAR OF LOG 1. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE THIRD LOG SUCH THAT THE ROOT COLLAR OF THE LOG RESTS ON LOG 2, 7 FT FROM THE UPSTREAM END. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE FOURTH LOG SUCH THAT THE ROOT COLLAR OF THE LOG RESTS ON LOG 2, 12 FT FROM THE UPSTREAM END. TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED. PLACE FIFTH LOG SUCH THAT THE ROOT COLLAR OF THE LOG RESTS ON LOG 2, JUST UPSTREAM OF THE BURIAL POINT (18 FEET FROM UPSTREAM END). TILT ANGLE AND BURIAL SHALL BE AS SPECIFIED.
FILL GAP BETWEEN BOTTOM OF LOG 2 AND SLOPE WITH CLASS 700 RIP RAP AND ROUNDED RIVER ROCK (APPROX. 2 CY, 1.5 FT DEEP). FILL VOIDS UP TO LOG CROWNS WITH SOIL AND PLANT PER LANDSCAPING PLAN.
1
2
3
4
5
6
LARGE WOOD MATERIAL SCHEDULE
TOTAL 100
ROOTWAD COLLAR FLOW
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Sections Provided by OTAK, Inc.
USE THE FOLLOWING STEPS TO MINIMIZE CREOSOTE RELEASE, SEDIMENT DISTURBANCE, AND TOTAL SUSPENDED SOLIDS:
1. INSTALL A FLOATING SURFACE BOOM TO CAPTURE FLOATING SURFACE DEBRIS. 2. KEEP ALL EQUIPMENT (E.G., BUCKET, STEEL CABLE, VIBRATORY HAMMER) OUT OF THE WATER, GRIP PILES ABOVE THE
WATERLINE, AND COMPLETE ALL WORK DURING LOW WATER AND LOW CURRENT CONDITIONS. 3. DISLODGE THE PILING WITH A VIBRATORY HAMMER, WHENEVER FEASIBLE--NEVER INTENTIONALLY BREAK A PILE BY
TWISTING OR BENDING. 4. SLOWLY LIFT THE PILE FROM THE SEDIMENT AND THROUGH THE WATER COLUMN. 5. PLACE THE PILE IN A CONTAINMENT BASIN ON A BARGE DECK, PIER, OR SHORELINE WITHOUT ATTEMPTING TO CLEAN OR
REMOVE ANY ADHERING SEDIMENT (A CONTAINMENT BASIN FOR THE REMOVED PILES AND ANY ADHERING SEDIMENT MAY BE CONSTRUCTED OF DURABLE PLASTIC SHEETING WITH SIDEWALLS SUPPORTED BY HAY BALES OR ANOTHER SUPPORT STRUCTURE TO CONTAIN ALL SEDIMENT, AND RETURN FLOW MAY BE DIRECTED BACK TO THE WATERWAY).
6. FILL THE HOLES LEFT BY EACH PILING WITH CLEAN, NATIVE SEDIMENTS. 7. DISPOSE OF ALL REMOVED PILES, FLOATING SURFACE DEBRIS, ANY SEDIMENT SPILLED ON WORK SURFACES, AND ALL
CONTAINMENT SUPPLIES AT A PERMITTED UPLAND DISPOSAL SITE.
IF PILE CAN NOT BE REMOVED BY PULLING FOLLOW DETAIL 1. INSTALL STEEL CASING BELOW MUDLINE, MIN 3FT or REFUSAL 2. ROTATE CASING TO SNAP PILE OFF BELOW MUDLINE 3. TRANSPORT PILE IN CASING TO DISPOSAL AREA 4. DISPOSE PILE IN ACCORDANCE TO ALL STATE AND FEDERAL REGULATIONS 5. BACKFILL HOLE WITH CLEAN SAND OR MATERIALS AS SHOWN ON PLANS 6. IF PILE IS NOT FULLY REMOVED MARK REMNANT ON SHEETS C2.0 AND C2.1 AND PROVIDE TO ENGINEER OF RECORD
PILE REMOVAL DETAIL1 NOT TO SCALE
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EXISTING CONTOUR
PROPOSED CONTOUR
ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
PROPERTY BOUNDARY / TAX LOT
REMOVED WOOD PILE (TYP)
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
FUTURE BUILDING (BY OTHERS)
PROPERTY BOUNDARY
TRANSITION GRADING TO ADJACENT GREEN WAY AS SHOWN
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
21
ORDINARY LOW WATER (6.12' ELEVATION
CITY OF PORTLAND DATUM)
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
M AT
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Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
NOTE: BANK SECTIONS ARE SHOWN ON FIGURES 7C-7E
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ORDINARY LOW WATER (OHW ELEV 5.90')
SOUTH WATER FRONT TOP OF BANK (2002, PORTLAND GIS)
PROPOSED FENCE
PROPERTY BOUNDARY / TAX LOT
"BASE" ALIGNMENT
FUTURE BUILDING (BY OTHERS)
LIMIT OF PROPOSED BANK REGRADING SEE TYPICAL SECTION SEET C3.0
TYPE 1 (TYP.) LARGE WOOD TYPE 2 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 1 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 4 (TYP.) SEE FIGURE 5E
LARGE WOOD TYPE 3 (TYP.) SEE FIGURE 5E
WORK LIMIT FOR BANK STABILIZATION
POST-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
SOUTH WATERFRONT TOP OF BANK 2002 (PORTLAND GIS)
ORDINARY LOW WATER (6.12' ELEVATION CITY OF PORTLAND DATUM)
PRE-PROJECT ORDINARY HIGH WATER (18.22' ELEVATION CITY OF PORTLAND DATUM)
19
7
5+ 50
5+ 50
BANK STABILIZATION TO MATCH EXISTING GROUND EXISTING SLOPES 2H:1V OR FLATTER
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Grading Plan (South) and Cross Section Locations
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
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EDGE OF TRAIL
EDGE OF TRAIL
BASE ALIGNMENT SECTION: STA 0+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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BASE ALIGNMENT SECTION: STA 0+50.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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BASE ALIGNMENT SECTION: STA 1+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
-10
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40
-10
0
10
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BASE ALIGNMENT SECTION: STA 1+50.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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LIMIT OF PROPOSED BANK GRADING LIMIT OF PROPOSED
BANK GRADING
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
ACTUAL 4.2:1
ACTUAL 4.4:1
ACTUAL 3.1:1
ACTUAL 4.0:1
ACTUAL 2.3:1
ACTUAL 3.3:1
ACTUAL 3.6:1
ACTUAL 2.2:1
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR
FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION
SLOPES 2H:1V OR FLATTER
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
C:\Users\Lisa\Desktop\WorkFromHome\6758 Alamo Manhattan\AutoCAD\Plot Dwg\Fig7C-7E Xsects.dwg, 7/9/2020 8:54:51 AM, AutoCAD PDF (High Quality Print).pc3NWP-2019-494-1 Page 12 of 15 Encl 1
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60
BASE ALIGNMENT SECTION: STA 2+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
-10
0
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40
-10
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BASE ALIGNMENT SECTION: STA 2+50.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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BASE ALIGNMENT SECTION: STA 3+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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BASE ALIGNMENT SECTION: STA 3+50.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
ACTUAL 2.2:1
ACTUAL 3.2:1
ACTUAL 2.3:1
ACTUAL 3.0:1
ACTUAL 2.9:1
ACTUAL 3.0:1
ACTUAL 2.3:1
ACTUAL 3.4:1
BANK STABILIZATION
SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND,
EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
WORK LIMIT
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
C:\Users\Lisa\Desktop\WorkFromHome\6758 Alamo Manhattan\AutoCAD\Plot Dwg\Fig7C-7E Xsects.dwg, 7/9/2020 8:55:13 AM, AutoCAD PDF (High Quality Print).pc3NWP-2019-494-1 Page 13 of 15 Encl 1
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BASE ALIGNMENT SECTION: STA 4+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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0
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10
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BASE ALIGNMENT SECTION: STA 4+50.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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BASE ALIGNMENT SECTION: STA 5+00.00 Horiz. Scale: 1" = 10' Vert. Scale: 1" =10'
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PROPOSED GROUND
EXISTING GROUND
BANK GRADING
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
MAX 2:1
MAX 3:1
ACTUAL 3.2:1
ACTUAL 3.1:1
ACTUAL 2.1:1
ACTUAL 3.5:1
ACTUAL 3.2:1
ACTUAL 2.2:1
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
BANK STABILIZATION TO MATCH EXISTING GROUND, EXISTING SLOPES 2H:1V OR FLATTER
WORK LIMIT WORK LIMIT
Alamo Manhattan Bank Stabilization Project - Portland, Oregon Pacific Habitat Services,Inc. 9450 SW Commerce Circle, Suite 180 Wilsonville, Oregon 97070 Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
Horiz. Scale: 1"=30' Vert. Scale: 1"=30'
C:\Users\Lisa\Desktop\WorkFromHome\6758 Alamo Manhattan\AutoCAD\Plot Dwg\Fig7C-7E Xsects.dwg, 7/9/2020 8:55:35 AM, AutoCAD PDF (High Quality Print).pc3NWP-2019-494-1 Page 14 of 15 Encl 1
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BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 0+80 to 1+15, 3+70 to 4+00 NOT TO SCALE
MAX 2:1
FUTURE GREENWAY
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
LIMIIT OF BANK STABILIZATION AT ELEV. 0
EXISTING GROUND
PROPOSED GROUND
EXISTING SLOPE
1'
3'
SEPARATION GEOTEXTILE
EXISTING SLOPES 2H:1V OR FLATTER
LIMIT OF PROPOSED BANK RE-GRADING
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURES 5C AND 5D.
BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 1+15 to 3+70 NOT TO SCALE
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
LIMIT OF PROPOSED BANK RE-GRADING
EXISTING GROUND
PROPOSED GROUND
EXISTING SLOPE
FUTURE GREENWAY
1'-6" FILTER BLANKET
OHW ELEV. 18.22 FT
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURES 5C AND 5D.
6" to 2" RIVER ROCK
SEPARATION GEOTEXTILE
EXISTING SLOPES 2H:1V OR FLATTER
LIMIT OF PROPOSED BANK RE-GRADING
LIMIIT OF BANK STABILIZATION AT ELEV. 0
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
EXISTING GROUND
PROPOSED GROUND
BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 0+00 to 0+80, 4+00 to 4+20 NOT TO SCALE
FUTURE GREENWAY
2.5" to 0" WELL GRADED ROUNDED ROCK AT ALCOVE AREAS
1'-6" FILTER BLANKET
CLASS 700 RIPRAP
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURES 5C AND 5D.
SEPARATION GEOTEXTILE
MAX 3:1
MATCH EXISTING GROUND EXISTING SLOPES 4H:V1 OR FLATTER
OHW ELEV. 18.22LIMIT OF PROPOSED BANK RE-GRADING
MAX 2:1
1.5'
3'
6" TO 2" RIVER ROCK
BANK STABILIZATION TYPICAL SECTION: BASE ALIGNMENT STA. 4+20 to 5+30 NOT TO SCALE
FUTURE GREENWAY
2.5" to 0" WELL GRADED ROUNDED ROCK AT ALCOVE AREAS
ALCOVE AREA: BANK STABILIZATION TO
MATCH EXISTING GROUND EXISTING SLOPES 4H:V1 OR FLATTER
LIMIT OF PROPOSED BANK RE-GRADING
MAX 3:1
MAX 2:1
EXISTING GROUND
PROPOSED GROUND
STABILIZED SOIL WITH NATIVE VEGETATION (SEE L SHEETS FOR PLANTING)
1'-6" FILTER BLANKET
CLASS 700 RIPRAP
CLASS 700 RIPRAP WITH LARGE WOOD STRUCTURES. SEE FIGURE 5C AND 5D.
SEPARATION GEOTEXTILE1.5'
1 2
Phone: (503) 570-0800 Fax (503) 570-0855
FIGURE
