Full Text
SAMMAMISH RIVER OHWM EDGE OF 150' SAMMAMISH RIVER HABITAT CONSERVATION BUFFER M1.00 MITIGATION PLAN MITIGATION PLAN SCALE: 1" = 10'-0" 1 NO. FINAL PREP INTAKE DATE REMARK ISSUE DATE: DRAWN BY: CHECKED BY: SHEET NO: Hopelink Redmond Integrated Service Center DRAWING NAME: 177 Western Avenue West, Suite 266 Seattle I 98119 15511 NE 90th St. Redmond, WA 98052 30% INTAKE 1 2.16.16 JHD KL 09.01.2016 60% INTAKE 2 5.5.16 90% INTAKE 3 9.1.16 FINAL INTAKE 4 10.20.16 3,400 SF ENHANCEMENT AREA 4,556 SF RESTORATION AREA 3,720 SF OF BUILDING, CONCRETE SIDEWALK AND ASPHALT PAVEMENT TO BE REMOVED TREE TO BE REMOVED 10" MAPLE 12.5" ASPEN 14" RED MAPLE TREE TO BE REMOVED 7" ASPEN 8.5" ASPEN EXISTING KING COUNTY PATH PROPERTY BOUNDARY 1. INSTALL HIGH VISIBILITY ORANGE FENCE AT WEST EDGE OF ENHANCEMENT AREA. 2. PROTECT ALL EXISTING TREES AND SHRUBS IN ENHANCEMENT PORTION OF BUFFER, EXCEPT FOR THE 5(FIVE) QUAKING ASPEN (POPULOUS TREMULOIDES) THAT HAVE BEEN IDENTIFIED FOR REMOVAL 3. REMOVE CONCRETE SIDEWALK AND BUILDING FOUNDATION IN RESTORATION PORTION OF BUFFER AS PART OF SITE DEMOLITION. 4. GRADE RESTORATION PORTION OF BUFFER TO THE 33 FOOT ELEVATION AS PART OF SITE GRADING. 5. AMEND BUFFER RESTORATION AREA WITH 1 FOOT TOPSOIL TO ACHIEVE A 34 FOOT ELEVATION TO MATCH EXISTING GRADES. 6. REMOVE ALL HIMALAYAN BLACKBERRY (RUBUS ARMENIACUS), FIELD BINDWEED (CONVOLVULUS ARVENSIS) AND WESTERN DOCK (RUMEX OCCIDENTALIS) IN THE ENHANCEMENT PORTION OF THE BUFFER AS WELL AS ANY OTHER INVASIVE SPECIES PRESENT. 7. INSTALL TEMPORARY IRRIGATION PER SITE IRRIGATION PLAN 8. REMOVE GRASS AND COMPETING VEGETATION FROM 3' DIAMETER CIRCLES AT PLANTING LOCATIONS IN ENHANCEMENT AREA. SITE PREPARATION NOTES KING COUNTY PARCEL EXHIBIT H ---PAGE BREAK--- 1 2 EDGE OF 150' SAMMAMISH RIVER HABITAT CONSERVATION BUFFER EXISTING TREES SYMBOL QTY SCIENTIFIC NAME COMMON NAME CONTAINER CALIPER HEIGHT NATIVE OR ADAPTIVE DECIDUOUS/EVERGREEN SPACING 3(2) PSEUDOTSUGA MENZIESII DOUGLAS FIR 8 - 16" NATIVE EXISTING EVERGREEN TO REMAIN 1 ACER BIGLEAF MAPLE 13" NATIVE EXISTING DECIDUOUS TO REMAIN 1 ACER SP (ORNAMENTAL) MAPLE 10 - 12" NON-NATIVE EXISTING DECIDUOUS TO REMAIN 1(3) POPULOUS TRICOCARPA BLACK COTTONWOOD 14 - 26" NATIVE EXISTING DECIDUOUS TO REMAIN 3 POPULOUS TREMULOIDES QUAKING ASPEN 4 - 6" NATIVE EXISTING DECIDUOUS TO REMAIN TOTAL 7(7) QUANTITIES IN PARENTHESIS ARE ROOTED OFF PROPERTY BUT HAVE CANOPY COVERAGE ON PROPERTY SHRUBS / SMALL TREES SYMBOL QTY SCIENTIFIC NAME COMMON NAME CONTAINER CALIPER HEIGHT NATIVE OR ADAPTIVE DECIDUOUS/EVERGREEN SPACING 5 ACER CIRCINATUM VINE MAPLE 5 GAL NATIVE DECIDUOUS 1 CORYLUS CORNUTA WESTERN HAZELNUT 2 GAL NATIVE DECIDUOUS 3 SAMBUCUS RACEMOSA RED ELDERBERRY 2 GAL NATIVE DECIDUOUS 6 ALBUS SNOWBERRY 2 GAL NATIVE DECIDUOUS 5 ROSA GYMNOCARPA DWARF ROSE 2 GAL NATIVE DECIDUOUS SUBTOTAL 20 FERNS SYMBOL QTY SCIENTIFIC NAME COMMON NAME CONTAINER CALIPER HEIGHT NATIVE OR ADAPTIVE DECIDUOUS/EVERGREEN SPACING 7 POLYSTICHUM MUNITUM WESTERN SWORDFERN 1 GAL 18" MIN. NATIVE EVERGREEN SUBTOTAL 7 TOTAL 27 PLANT SCHEDULE - BUFFER ENHANCEMENT AREA TREES SYMBOL QTY SCIENTIFIC NAME COMMON NAME CONTAINER CALIPER HEIGHT NATIVE OR ADAPTIVE DECIDUOUS/EVERGREEN SPACING 4 PSEUDOTSUGA MENZIESII DOUGLAS FIR 5 GAL 2" 6 - 8' HT NATIVE EVERGREEN AS SHOWN 8 THUJA PLICATA WESTERN RED CEDAR 5 GAL 2" 6 - 8' HT NATIVE EVERGREEN AS SHOWN 6 SALIX SCOULERIANA SCOULER'S WILLOW 5 GAL 1" 3 - 4' HT NATIVE DECIDUOUS AS SHOWN SUBTOTAL 18 SHRUBS / SMALL TREES SYMBOL QTY SCIENTIFIC NAME COMMON NAME CONTAINER CALIPER HEIGHT NATIVE OR ADAPTIVE DECIDUOUS/EVERGREEN SPACING 6 AMELANCHIER ALNIFOLIA SERVICEBERRY 2 GAL NATIVE DECIDUOUS 10 CORYLUS CORNUTA WESTERN HAZELNUT 2 GAL NATIVE DECIDUOUS 22 SAMBUCUS RACEMOSA RED ELDERBERRY 2 GAL NATIVE DECIDUOUS 43 ALBUS SNOWBERRY 2 GAL 16" MIN NATIVE DECIDUOUS 77 ROSA GYMNOCARPA DWARF ROSE 2 GAL 16" MIN NATIVE DECIDUOUS 47 VACCINIUM OVATUM EVERGREEN HUCKLEBERRY 5 GAL 24" MIN. NATIVE EVERGREEN SUBTOTAL 205 FERNS SYMBOL QTY SCIENTIFIC NAME COMMON NAME CONTAINER CALIPER HEIGHT NATIVE OR ADAPTIVE DECIDUOUS/EVERGREEN SPACING 60 POLYSTICHUM MUNITUM WESTERN SWORDFERN 1 GAL NATIVE EVERGREEN SUBTOTAL 60 TOTAL 283 PLANT SCHEDULE - BUFFER RESTORATION AREA M1.01 PLANTING: PLANTING PLAN PLANTING: PLANTING PLAN SCALE: 1" = 10'-0" 1 NO. FINAL PREP INTAKE DATE REMARK ISSUE DATE: DRAWN BY: CHECKED BY: SHEET NO: Hopelink Redmond Integrated Service Center DRAWING NAME: 177 Western Avenue West, Suite 266 Seattle I 98119 15511 NE 90th St. Redmond, WA 98052 30% INTAKE 1 2.16.16 JHD KL 09.01.2016 60% INTAKE 2 5.5.16 90% INTAKE 3 9.1.16 FINAL INTAKE 4 10.20.16 1. ALL PLANT SPECIES SHALL BE TRUE TO SPECIES - NO SUBSTITUTIONS ARE ALLOWED WITHOUT PRIOR APPROVAL OF THE CITY OF REDMOND. 2. PLANTING SHALL OCCUR BETWEEN OCTOBER 15 AND NOVEMBER 30 OR FEBRUARY 15 AND MARCH 30 CONTINGENT ON WEATHER. 3. ALL PLANT MATERIAL SHALL BE KEPT WATERED AND OUT OF DIRECT SUN UNTIL PLANTED. 4. FOLLOWING PLANTING, INSTALL 3 INCHES OF BARK OR WOOD MULCH TO THE ENTIRE RESTORATION PORTION OF THE BUFFER AND TO PLANTED AREAS WITHIN THE ENHANCEMENT PORTION OF THE BUFFER. PLANTING NOTES 650 SF NEW GRAVEL PATH RESTORATION AREA ENHANCEMENT AREA RESTORATION ZONE PLANTING AREA = 3,750 SF (0.08 ACRE) APPROXIMATE OVERALL SPACING - 3.6 FEET EXHIBIT H ---PAGE BREAK--- 1 2 EDGE OF 150' SAMMAMISH RIVER HABITAT CONSERVATION BUFFER M1.02 MAINTENANCE / MONITORING PLAN NO. FINAL PREP INTAKE DATE REMARK ISSUE DATE: DRAWN BY: CHECKED BY: SHEET NO: Hopelink Redmond Integrated Service Center DRAWING NAME: 177 Western Avenue West, Suite 266 Seattle I 98119 15511 NE 90th St. Redmond, WA 98052 30% INTAKE 1 2.16.16 JHD KL 09.01.2016 60% INTAKE 2 5.5.16 90% INTAKE 3 9.1.16 FINAL INTAKE 4 10.20.16 1. CONDUCT BASELINE MONITORING AND SUBMIT REPORT WITHIN ONE MONTH (30 DAYS) OF PLANTING COMPLETION. 2. ESTABLISH MONITORING ZONES AS SHOWN USING STAKES TO MARK THE BOUNDARY BETWEEN ZONES A AND B AND ZONES C AND D. 3. TALLY ALL PLANTED SPECIES IN EACH ZONE AND EACH TREE GREATER THAN 3 FOOT TALL IN ZONES C AND D. 4. NOTIFY THE PROJECT MANAGER IMMEDIATELY OF ANY DISCREPANCIES IN NUMBER, SIZE OR GENERAL SPACING OF PLANTED INDIVIDUALS. 5. NOTIFY THE PROJECT MANAGER IMMEDIATELY IF PLANTS APPEAR STRESSED OR HAVE POOR VIGOR. 6. ESTIMATE PERCENT COVER OF ALL SPECIES IN EACH ZONE. THIS INCLUDES PLANTED STOCK, VOLUNTEER NATIVES AND INVASIVES. 7. TAKE PHOTOS AT PHOTO POINTS AS SHOWN. 8. VERIFY MULCH AS BEEN APPLIED APPROPRIATELY AND TEMPORARY IRRIGATION IS INSTALLED AS SHOWN ON PLANS. 9. A BASELINE MONITORING PLAN SHEET SHALL BE PREPARED THAT SHOWS THE LOCATIONS OF ALL PLANTED STOCK AND ANY DEVIATIONS FROM THE MITIGATION DESIGN. BASELINE VEGETATIVE MONITORING YEAR ZERO MAINTENANCE / MONITORING PLAN SCALE: 1" = 10'-0" 1 RESTORATION AREA ENHANCEMENT AREA 1. BEGIN YEARLY MONITORING ONE GROWING SEASON AFTER PLANT INSTALLATION. 2. CONDUCT YEAR 1 MONITORING IN EARLY SPRING AND LATE SUMMER FOLLOWING PLANTING. 3. CONDUCT YEARS 2 THROUGH 5 MONITORING IN LATE SUMMER OR EARLY FALL BEFORE LEAF SENESENCE. 4. REPORTS ARE DUE BEFORE THE END OF THE CALENDAR YEAR 5. IN YEARS 1-3, TALLY ALL PLANTED SPECIES IN EACH ZONE AND CALCULATE MORTALITY AND PERCENT SURVIVAL BY SPECIES IN EACH ZONE. 6. ESTIMATE PERCENT COVER OF ALL SPECIES IN EACH ZONE, INCLUDING EXISTING VEGETATION, NATIVE COLONIZERS AND INVASIVES. 7. DESCRIBE GENERAL APPEARANCE OF PLANTED STOCK NOTING ANY LACK OF VIGOR, WATER STRESS, BROWSING OR INSECT DAMAGE. 8. COMPARE SURVIVAL AND PERCENT COVER TO SUCCESS CRITERIA AND PERFORMANCE STANDARDS. 9. NOTE ANY MORTALITY OF EXISTING TREES IN ZONES C AND D. 10. NOTE ANY EVIDENCE OF TRAMPLING OR TRASH IN THE BUFFER AREA 11. NOTE ANY EVIDENCE OF WILDLIFE USE INCLUDING SCAT, BROWSING, NESTS, SIGHTINGS, ETC. 12. TAKE PHOTOS AT PHOTO POINTS AS SHOWN 13. MAKE RECOMMENDATIONS REGARDING IRRIGATION REGIME. 14. NOTE ANY VOLUNTEER NATIVE SHRUBS AND TREES 15. NOTE ANY SIGNS OF OVERCROWDING OR NEED FOR THINNING. MITIGATION MONITORING YEARS 1 THROUGH 5 SUCCESS CRITERIA x CONTINUE IRRIGATION FOR AT LEAST 3 YEARS. ADJUST IRRIGATION AS NEEDED BASED ON RECOMMENDATIONS FROM QUALIFIED CONSULTANT x CONDUCT MANUAL WEED CONTROL THREE TIMES YEARLY (SPRING, MID-SUMMER, EARLY FALL). PULL OR DIG ALL INVASIVE PLANTS IN BOTH THE RESTORATION AREA AND THE ENHANCEMENT AREA. SPECIES OF PARTICULAR CONCERN INCLUDE THE FOLLOWING: MAINTENANCE PLAN x ANY OTHER SPECIES LISTED ON THE KING COUNTY NOXIOUS WEED LIST SHOULD ALSO BE REMOVED IF PRESENT. PLANTS SHOULD BE REMOVED WITH ROOTS, BAGGED AND DISPOSED OF OFF-SITE IN A PROPER WASTE DISPOSAL FACILITY. x NO HERBICIDES, PESTICIDES OR FERTILIZERS SHALL BE USED IN THE MITIGATION AREA WITHOUT THE WRITTEN APPROVAL OF THE CONSULTANT OR THE CITY OF REDMOND. x MAINTAIN SIGNS AND TEMPORARY FENCES IF NEEDED. REMOVE TRASH ON A REGULAR BASIS (AT LEAST CONTINGENCY MEASURES ARE TRIGGERED BY THE YEARLY MONITORING. THE MEASURES ARE INTENDED TO ENSURE THAT THE PROJECT MEETS THE STATED PROJECT TARGETS AND PERFORMANCE STANDARDS AT THE END OF THE MONITORING PERIOD. THE MONITORING REPORTS WILL CONTAIN A SECTION ON RECOMMENDED CONTINGENCY MEASURES. THE CITY WILL REVIEW THE MONITORING REPORTS AND CONTINGENCY RECOMMENDATIONS AND WORK WITH THE APPLICANT TO REFINE AND APPROVE ALL CONTINGENCY MEASURES BEFORE THEY ARE IMPLEMENTED. CONTINGENCY MEASURES MAY INCLUDE: 1. REPLACING ALL PLANTING STOCK MORTALITY IN THE NEXT PLANTING WINDOW (FALL OR EARLY SPRING). IF A PARTICULAR SPECIES IS NOT THRIVING IN A GIVEN LOCATION IT SHOULD BE REPLACED BY A COMPARABLE SPECIES AT THE DIRECTION OF THE ENVIRONMENTAL CONSULTANT OR THE CITY OF REDMOND. 2. ADJUSTING IRRIGATION AS NEEDED TO CORRECT OVER OR UNDER WATERING 3. APPLYING MORE MULCH IF AREAS OF BARE GROUND APPEAR AFTER SEVERAL YEARS. 4. CONDUCTING ADDITIONAL WEED CONTROL IF THE SCHEDULED WEED CONTROL IS INEFFECTIVE IN CONTROLLING INVASIVE SPECIES 5. THINNING NATIVE VOLUNTEERS IN RESTORATION AREA IF THEY ARE CROWDING OUT THE PLANTED STOCK 6. REPLACING SIGNS IF DAMAGED OR MISSING. 7. INSTALLING FENCING ALONG EDGE OF PARKING LOT IF PEOPLE ARE CUTTING PATHS, TRAMPLING VEGETATION OR OTHERWISE CREATING UNDO DISTURBANCE OF THE MITIGATION AREA ALL CONTINGENCY MEASURES MUST BE APPROVED BY THE CITY OF REDMOND BEFORE IMPLEMENTATION. THE CITY MAY AT ITS DISCRETION REQUIRE ADDITIONAL CONTINGENCY MEASURES. CONTINGENCY MEASURES ZONE A ZONE C ZONE D ZONE B SIGN - "FISH & WILDLIFE CONSERVATION AREA" PHOTO POINT AND DIRECTION A LEGEND SIGN SIGN SIGN SIGN SIGN H J I A B C D G E F PERFORMANCE STANDARDS SYMBOL MANUFACTURER/MODEL/DESCRIPTION QTY HUNTER I-20-00 4 SHRUB ROTOR, FIXED RISER. ADJUSTABLE AND FULL CIRCLE. PLASTIC RISER. DRAIN CHECK VALVE. STANDARD NOZZLE. HUNTER I-20-00 3 SHRUB ROTOR, FIXED RISER. ADJUSTABLE AND FULL CIRCLE. PLASTIC RISER. DRAIN CHECK VALVE. STANDARD NOZZLE. IRRIGATION SYSTEM LEGEND EXHIBIT H