HomeMy WebLinkAboutAR Stream Study - Sewell
December 22, 2015
Justin Lagers
Avana Ridge, LLC
9675 SE 36th Street, Suite 105
Mercer Island, WA
RE: Wetland and Supplemental Stream Study – Avana Ridge PUD
City of Renton, Washington
SWC Job #15-159
Dear Justin,
This report describes our observations of jurisdictional wetlands, streams
and buffers on or within 100’ of the proposed Avana Ridge PUD project in
the City of Renton, Washington (the “site”).
Above: Vicinity Map of site
Sewall Wetland Consulting, Inc.
PO Box 880 Phone: 253-859-0515
Fall City, WA 98024
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 2
The site consists of an irregular shaped group of 2 parcels with a total
area of 3.78 acres located within the SW ¼ of Section 29, Township 23
North, Range 5 East of the W.M.
The site is undeveloped third growth forest.
The site is proposed to be developed with an apartment complex with
associated infrastructure.
METHODOLOGY
Ed Sewall of Sewall Wetland Consulting, Inc. inspected the site on
August 4 and September 8, 2015. The site was reviewed using
methodology described in the Washington State Wetlands Identification
Manual (WADOE, March 1997). This is the methodology currently
recognized by the City of Kirkland and the State of Washington for
wetland determinations and delineations. The site was also inspected
using the methodology described in the Corps of Engineers Wetlands
Delineation Manual (Environmental Laboratory, 1987), and the Western
Mountains, Valleys and Coast region Supplement (Version 2.0) dated June
24, 2010, as required by the US Army Corps of Engineers. Soil colors
were identified using the 1990 Edited and Revised Edition of the Munsell
Soil Color Charts (Kollmorgen Instruments Corp. 1990).
OBSERVATIONS
Existing Site Documentation.
Prior to visiting the site, a review of several natural resource inventory
maps was conducted. Resources reviewed included the Streams Study
conducted by 2008 The Watershed Company, as well as a site visit with
WDFW area habitat biologist Larry Fisher on September 8, 2015.
King County iMap website
According to the King County iMap website (see Vicinity map page 1 of
this report), there are no wetlands or streams on the site.
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 3
National Wetlands Inventory (NWI)
The NWI map depicts no wetlands or streams on or near the site.
Above: NWI map of the area of the site
Soil Survey
According to the NRCS Soil Mapper website, the west and east sides of
the site are mapped as Alderwood gravelly loam (Map units AgC) with
slopes from 8-15%. Alderwood soils were formed in glacial till and are
not considered "hydric" soils according to the publication Hydric Soils of
the United States (USDA NTCHS Pub No.1491, 1991).
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 4
Above: NRCS Soil mapping of the site
Wetland and Stream Study 2008 – The Watershed Company
The January 25, 2008 Wetland and Stream Study (see attached) for the
Cugini property (the site) was prepared and reviewed by the City at that
time. The results of the study was that there was one drainage feature
(Drainage/Stream A) which met stream criteria, and one (Drainage B)
which did not as it was a stormwater discharge. Stream A was found to
be an intermittent non-fish bearing water. No wetlands were found on
the site during this study. This study was reviewed and approved by the
City at that time.
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 5
Above: 2008 delineation of one stream on the site by The
Watershed Company
Field observations
Uplands
The site is comprised of a west facing hillside with a linear depression
through the center of the site. Storm drainage from 108th Avenue SE as
well as a plat to the east drain through storm drainage pipes in the road
and discharge on the east side of the site. This storm drainage runs
through the site and then enters another storm drainage system on
Benson Road.
The site is a mix of 20-30 year old big leaf maple, cottonwood, hazelnut
and sword fern. The understory has significant Himalayan blackberry
coverage. Several transient camps were found on the west side of the
site with associated trash and vegetation trampling.
Soil pits excavated throughout the site were found to be a gravelly loam
soils with colors ranging from 10YR 3/3-10YR ¾. All were found to be
dry.
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 6
Wetlands
As was found in the 2008 Watershed Company study, no wetlands were
found on or near the site.
Streams
A drainage referred to as “Stream A” was delineated through the center of
the site with blue flags labeled N1-N13 and S1-S13 marking the north
and south ordinary high water marks. This drainage matches the
“stream A” found in the 2008 Watershed Company report. The stream
was dry during our site visits. The drainage is a swale like feature that
carries storm water from several storm water sources to the east. There
is no observed natural water source feeding this drainage.
A site visit was conducted on September 8, 2015 with Larry Fisher, Area
Habitat Biologist for WDFW for this area. The purpose of the site visit
was to determine if WDFW would consider this a stream. Larry reviewed
the drainage and concluded that it was not jurisdictional water or a “water
of the state” from WDFW perspective (see attached email). As a result no
HPA would be required if any impacts were proposed.
The drainage on-site is considered a stream from the City of Renton
perspective based upon past regulation of this feature as a stream.
As defined in RMC 4.50.G7.a, this stream best meets the criteria of a
Type Ns water due to its intermittent flow and lack of fish use.
Per Renton Code section 4.50.G.2, Type Ns streams have a 50’ buffer
measured from the OHWM as well as a 15’ BSBL measured from the edge
of the buffer to any structure.
Proposed Project
The proposed project is the construction of an apartment complex with
associated infrastructure. Due to the configuration of the Type Ns
stream through the site, buffer averaging as is allowed by Code is
proposed to fit the project on the site. Portions of the northhern 50’
standard buffer area proposed to be reduced to 25’ as allowed by Code.
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 7
In addition, a small trail crossing through the buffer and across the
stream is proposed. The total area of reduced buffer is 8,835sf. To
compensate, 8,835sf of buffer will be added to portions of the buffer to
the east as well the north. In addition, the reduced buffer will be
enhanced through removal of exotic blackberry as well as under planting
native conifers.
Under RMC 4.50.H.2.b, the criteria for buffer averaging are as follows;
b. Criteria for Approval of Averaged Stream Buffer: Buffer width averaging
may be allowed only where the applicant demonstrates all of the following:
i. There are existing physical improvements in or near the water body and
associated riparian area; and
There are existing roads within the buffer on both the east and west sides
of the stream.
ii. Buffer width averaging will result in no net loss of stream/lake/riparian
ecological function; and
The proposed buffer averaging will reduce portions of the buffer that are
sloping away from the stream and are heavily covered with invasive
Himalayan blackberry. Reducing the buffer in this area will not impact
functions as most of the reduced buffer area slopes away from the stream
thus minimizing function in this area.
iii. The total area contained within the buffer after averaging is no less than
that contained within the required standard buffer width prior to averaging;
and
The total area of the averaged buffer is slightly larger than the standard
50’ buffer as required by Code. The area added is 9,527sf and the area
reduced is 8,895sf for a net gain of 412sf
iv. The proposed buffer standard is based on consideration of the best
available science as described in WAC 365-195-905; and
The proposed averaging and enhancement has been prepared utilizing
the standards of best available science.
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 8
v. Where the buffer width is reduced by averaging pursuant to this
subsection, buffer enhancement shall be required.
As depicted on the Avana Ridge PUD – Buffer Averaging and
Enhancement Plan, the reduced portions of the buffer are proposed to be
enhanced through removal of exotic blackberry and under planting the
existing deciduous forest with native evergreen trees and several tall
shrubs.
Under RMC 4.50.C.4, trails are allowed in the stream buffer as long as
mitigation of impact is provided.
Under RMC 4.50.J.2 Alterations Within Streams and Lakes or Associated
Buffers.
a. Criteria for Administrative Approval of Transportation Crossings in
Stream/Lake or Buffer Areas: Construction of vehicular or non-vehicular
transportation crossings may be permitted in accordance with an approved
stream/lake study subject to the following criteria:
i. The proposed route is determined to have the least impact on the
environment, while meeting City Comprehensive Plan Transportation
Element requirements and standards in RMC 4-6-060; and
The proposed bridged trail crossing is located within a narrow portion of
the stream and in an area where no impacts to any of the structure of
the stream will be impacted.
ii. The crossing minimizes interruption of downstream movement of wood
and gravel; and
The proposed narrow bridge crossing will be above the flow path of water
as well as any debris or sediments that may move in this drainage.
iii. Transportation facilities in buffer areas shall not run parallel to the
water body; and
There are no transportation facilities proposed that are parallel to the
water body.
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 9
iv. Crossings occur as near to perpendicular with the water body as
possible; and
The proposed crossing is perpendicular to the water body.
v. Crossings are designed according to the Washington Department of Fish
and Wildlife Fish Water Crossing Design Guidelines, 2013, and the
National Marine Fisheries Service Guidelines for Salmonid Passage at
Stream Crossings, 2000, as may be updated, or equivalent manuals as
determined by the Administrator; and
The crossing will be designed to meet this manual’s requirements.
vi. Seasonal work windows are determined and made a condition of
approval; and
The crossing will be constructed in the summer when there is no flow in
the channel. Since WDFW does not regulate this drainage there are no
work windows required under an HPA as none is required.
vii. Mitigation criteria of subsection L of this Section are met.
The mitigation requirements are being met in the Avana – Buffer
Averaging and Enhancement Plan.
If you have any questions in regards to this report or need additional
information, please feel free to contact me at (253) 859-0515 or at
esewall@sewallwc.com .
Sincerely,
Sewall Wetland Consulting, Inc.
Ed Sewall
Senior Wetlands Ecologist PWS #212
Attached: Site Map
WDFW email
The Watershed Company Study – Cugini 2008
PNW Avana/#15-159
Sewall Wetland Consulting, Inc.
December 22, 2015
Page 10
REFERENCES
Cowardin, L., V. Carter, F. Golet, and E. LaRoe. 1979. Classification of
Wetlands and Deepwater Habitats of the United States. U.S. Fish and
Wildlife Service, FWS/OBS-79-31, Washington, D. C.
Environmental Laboratory. 1987. Corps of Engineers Wetlands
Delineation Manual, Technical Report Y-87-1. U. S. Army Corps of
Engineers Waterways Experiment Station, Vicksburg, Mississippi.
Muller-Dombois, D. and H. Ellenberg. 1974. Aims and Methods of
Vegetation Ecology. John Wiley & Sons, Inc. New York, New York.
Munsell Color. 1988. Munsell Soil Color Charts. Kollmorgen
Instruments Corp., Baltimore, Maryland.
National Technical Committee for Hydric Soils. 1991. Hydric Soils of the
United States. USDA Misc. Publ. No. 1491.
Reed, P., Jr. 1988. National List of Plant Species that Occur in
Wetlands: Northwest (Region 9). 1988. U. S. Fish and Wildlife Service,
Inland Freshwater Ecology Section, St. Petersburg, Florida.
Reed, P.B. Jr. 1993. 1993 Supplement to the list of plant species that
occur in wetlands: Northwest (Region 9). USFWS supplement to Biol.
Rpt. 88(26.9) May 1988.
USDA NRCS & National Technical Committee for Hydric Soils, September
1995. Field Indicators of Hydric Soils in the United States - Version 2.1
XXX
X XXXXX XXDATE:JOB NUMBER:DESIGN BY:DRAWN BY:CHECK BY:Site Plan,Noxious WeedControl, NotesSHEET:1 OF 2 12/28/2015 15‐159 ES EARC ESNO. DATE NOTES
PROJECT:
CRITICAL AREA MITIGATION PLAN
Avana Ridge PUD
Renton, Washington Sewall Wetland Consulting, Inc.
PO Box 880 ‐ Fall City, Washington 98024 Phone: 253‐859‐0515PRIOR TO PLANT INSTALLATION, CONTROL NOXIOUS WEEDS WITHIN THE HATCHED AREA SHOWN ON THIS DETAIL. TARGET NOXIOUS WEED SPECIES SHALL INCLUDETHE FOLLOWING: ALL CLASS "A", "B", AND "C" NOXIOUS WEEDS (INCLUDING NON‐REGULATED "B" AND "C" NOXIOUS WEEDS) IDENTIFIED ON THE LATEST KINGCOUNTY NOXIOUS WEED LIST. DURING NOXIOUS WEED CONTROL WORK, EXISTING NATIVE VEGETATION SHALL BE PROTECTED FROM DAMAGE. ALL NOXIOUSWEED CONTROL CUTTINGS AND DEBRIS SHALL BE REMOVED FROM THE SITE.CONTROL METHODS:1. REDUCE TOP GROWTH OF NOXIOUS WEEDS. ACCEPTABLE METHODS INCLUDE: WALK BEHIND OR TRACTOR MOUNTED MOWER, EXCAVATOR WITHBUCKET AND THUMB, POWER SAW, BRUSH HOG, LINE TRIMMER, LOPPERS, CLIPPERS, HAND PULLING, OR APPROVED EQUAL.2. GRUB OUT LARGE ROOT CROWNS AND MAJOR ROOTS BY HAND USING CLAW MATTOCK, PULASKI, OR APPROVED EQUAL.3. SPOT APPLY RODEO® HERBICIDE TO RE‐GROWTH. HERBICIDE SHALL BE APPLIED BY A WASHINGTON STATE LICENSED COMMERCIAL APPLICATORHAVING A CURRENT "AQUATIC" (Q) ENDORSEMENT.NOXIOUS WEED CONTROL REQUIREMENTS:11NUNDERGROUND UTILITY LOCATIONS SHOWN ARE APPROXIMATE.UTILITY LOCATIONS AND CHARACTERISTICS SHOWN ON THIS DRAWING, IF ANY,ARE BASED ON THE FIELD LOCATION OF THE APPARENT SURFACE EVIDENCE OFEXISTING STRUCTURES. THE UNDERGROUND ROUTING AND CONDITION OFBURIED UTILITIES HAS NOT BEEN VERIFIED OR CONFIRMED. ADDITIONAL UTILITYLOCATION AND MAPPING MAY BE REQUIRED. FIELD LOCATE, VERIFY DEPTH OF,AND ADEQUATELY PROTECT ALL UTILITIES PRIOR TO THE START OF WORK.GENERAL NOTES:1. ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH CITY OF RENTON CODES,ORDINANCES, AND APPROVED PERMIT CONDITIONS.2. BEFORE THE START OF ANY CONSTRUCTION, A PRE‐CONSTRUCTION MEETING MUSTBE HELD BETWEEN CITY OF RENTON, THE OWNER, AND THE CONTRACTOR.3. A COPY OF THESE PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS INPROGRESS.4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROVIDING ADEQUATE SAFEGUARDS,SAFETY DEVICES, PROTECTIVE EQUIPMENT, FLAGGERS, AND ANY OTHER NEEDEDACTIONS TO PROTECT THE LIFE, HEALTH, AND SAFETY OF THE PUBLIC, AND TOPROTECT PROPERTY IN CONNECTION WITH THE PERFORMANCE OF THE WORKSHOWN ON THESE DRAWINGS. ANY WORK WITHIN THE TRAVELED RIGHT‐OF‐WAYTHAT MAY INTERRUPT NORMAL TRAFFIC FLOW SHALL REQUIRE TRAFFIC CONTROL INACCORDANCE WITH ANY AND ALL CITY OF RENTON STANDARDS.5. SITE CONDITIONS MAY VARY BASED ON SEASON AND/OR TIME OF YEAR.CONTRACTOR SHALL ACCOMMODATE REALIZED AND ANTICIPATED SITE CONDITIONSWHEN COMPLETING THE WORK SHOWN ON THIS PLAN.MITIGATION PLAN NOTES:1. THE BOUNDARY/TOPOGRAPHIC MAP AND SITE PLAN USED TO GENERATE THIS PLANWAS PROVIDED BY DR STRONG CONSULTING ENGINEERS, INC. (620 7TH AVE ‐KIRKLAND, WASHINGTON 98033. SOURCE DRAWINGS HAVE BEEN MODIFIED FORVISUAL ENHANCEMENT. MAP DATE REFERENCE: 12/21/2015.MITIGATION PLAN SHEET INDEX: SHEET NUMBER DESCRIPTION 1SITE PLAN, NOXIOUS WEED CONTROL, NOTES2 PLANTING PLAN, MONITORING & MAINTENANCECONSTRUCTION SEQUENCE:1. FLAG LIMITS OF PLANTING AREA.2. REQUEST AND ATTEND PRE‐CONSTRUCTION MEETING WITH OWNER AND CITY OFRENTON.3. CONTROL NOXIOUS WEED SPECIES WITHIN THE AREAS SHOWN IN DETAIL 1‐1.4. INSTALL NATIVE PLANTS (SEE SHEET 2).5. PLACE MULCH AT BASE OF PLANTS (SEE SHEET 2).6. CLEAN‐UP AND DEMOBILIZE FROM SITE.7. REQUEST FROM AND ATTEND INSPECTION WITH OWNER.8. OWNER TO COMPLETE AS‐BUILT AND SUBMIT TO CITY OF RENTON.9. CONTRACTOR TO PROVIDE 1 YEAR OF MAINTENANCE UNDER DIRECTION OF OWNER.FUTURE MAINTENANCE TO BE PROVIDED BY OWNER.10.OWNER TO COMPLETE 5 YEARS OF MONITORING.SITE PLAN LEGEND50' STANDARD STREAM BUFFER LIMITS9,115 SF STREAM BUFFER REDUCTION9,527 SF STREAM BUFFER EXPANSION11,500 SF ENHANCEMENT PLANTINGS ‐ SEE DETAIL 2‐1SPLIT RAIL FENCING AT BUFFER LIMITS (1,060 LF) ‐ SEE DETAIL 2‐3CRITICAL AREA SIGNAGE AT BUFFER LIMITS (13 TOTAL) ‐ SEE DETAIL 2‐3SCALE IN FEETCONTOUR INTERVAL: 2 FOOT404020020SE 172ND STREETSR 515 (BENSON DRIVE)BE
N
S
O
N R
O
A
D TYPE Ns STREAMTYPE Ns STREAM80400NKnow what'sR25'25'50'50'CLIENT:
PNW HOLDINGS, LLC
9675 SE 36th Street ‐ Mercer Island, WA 98040 WEST BUILDINGEAST BUILDING
DATE:JOB NUMBER:DESIGN BY:DRAWN BY:CHECK BY:Planting Plan,Monitoring &MaintenanceSHEET:2 OF 2 12/28/2015 15‐159 ES EARC ESNO. DATE NOTES
PROJECT:
CRITICAL AREA MITIGATION PLAN
Avana Ridge PUD
Renton, Washington
CLIENT:
PNW HOLDINGS, LLC
9675 SE 36th Street ‐ Mercer Island, WA 98040
Sewall Wetland Consulting, Inc.
PO Box 880 ‐ Fall City, Washington 98024 Phone: 253‐859‐0515SPLIT RAIL FENCE AND CRITICAL AREA SIGN INSTALLATION DETAILNO SCALE32PLAN GOALS, OBJECTIVES, & PERFORMANCE STANDARDSGOAL:TO SUCCESSFULLY ESTABLISH ANATIVE PLANT COMMUNITYWITHIN THE STREAM BUFFERAREAS SHOWN ON THIS PLAN.TO LIMIT NOXIOUS WEED SPECIESWITHIN THE STREAM BUFFERAREAS SHOWN ON THIS PLAN.OBJECTIVE:TO INSTALL AND SUCCESSFULLYESTABLISH DENSELY PLANTED NURSERYGROWN TREES AND SHRUBS.TO PROVIDE FULL INITIAL CONTROL OFNOXIOUS WEED SPECIES AND THEN TOMINIMIZE THE GENERAL PRESENCE OFNOXIOUS WEED SPECIES .PURPOSE OF AND NEED FOR PLAN:THE PURPOSE OF THIS PLAN IS TO DESCRIBE THE STREAM BUFFER MODIFICATIONREQUIRED FOR THE CONSTRUCTION OF A PLANNED URBAN DEVELOPMENT (PUD)LOCATED IN RENTON, WASHINGTON.PLAN GOALS, OBJECTIVES, AND PERFORMANCE STANDARDS:PLAN GOALS, OBJECTIVES, AND PERFORMANCE STANDARDS ARE OUTLINED IN THETABLE BELOW. THE GOALS AND OBJECTIVES OF THIS PLAN ARE CONSIDEREDACHIEVED WHEN THE PERFORMANCE STANDARDS ARE SATISFIED.MONITORING PLAN (DURATION = 5 YEARS):AS‐BUILTSCHEDULE: IMMEDIATELY FOLLOWING CONSTRUCTIONFOLLOWING COMPLETION OF THE WORK SHOWN ON THIS PLAN, A QUALIFIEDPROFESSIONAL SHALL PREPARE AN AS‐BUILT. THE AS‐BUILT SHALL SUMMARIZE THECOMPLETED WORK AS WELL AS ANY DEVIATIONS FROM THE APPROVED VERSION OFTHIS PLAN.IN ADDITION TO THE AS‐BUILT, BASELINE MONITORING DATA SHALL BE COLLECTEDAND PERMANENT PHOTO POINTS SHALL BE ESTABLISHED TO DOCUMENTREPRESENTATIVE CONDITIONS WITHIN ENHANCED STREAM BUFFER AREAS.BASELINE MONITORING DATA COLLECTED AND REPORTED WITH THE AS‐BUILTSHALL BE CONSISTENT WITH THAT DESCRIBED FOR ANNUAL MONITORING.THE AS‐BUILT AND BASELINE MONITORING DATA SHALL BE SUBMITTED TO THE CITYOF RENTON NO LATER THAN 30 DAYS FROM THE DATE THAT THE WORK SHOWN ONTHIS PLAN HAS BEEN COMPLETED.ANNUAL MONITORINGSCHEDULE: ANNUALLY FOR 5 YEARS FOLLOWING PLANT INSTALLATIONFOLLOWING ACCEPTANCE OF THE AS‐BUILT, ANNUAL MONITORING SHALL BECOMPLETED FOR A PERIOD OF FIVE (5) YEARS. ANNUAL MONITORING SHALL BECOMPLETED BY A QUALIFIED PROFESSIONAL AND SHALL COMPRISE A SITEINVESTIGATION AND REPORTING PER THE FOLLOWING INTERVAL:QUARTERLY DURING THE FIRST YEAR (YEAR 1) FOLLOWING PLANTINSTALLATION; ANDIN AUGUST OR SEPTEMBER OF THE SECOND THROUGH FIFTH YEARS (YEAR 2THROUGH YEAR 5) FOLLOWING INITIAL PLANT INSTALLATION.THE PURPOSE OF THE DETAILED SITE ASSESSMENTS IS TO EVALUATE CONDITIONSWITHIN ENHANCED STREAM BUFFER AREAS PER THE CURRENT YEAR'SPERFORMANCE STANDARDS. THE FOLLOWING INFORMATION SHALL BE COLLECTEDAND ASSESSED RELATIVE TO THE PERFORMANCE STANDARDS ESTABLISHED FOR THEPROJECT:THE PERCENT SURVIVAL OF INSTALLED PLANT STOCK (YEAR 1 AND YEAR 2ONLY). A DIRECT COUNT INVENTORY AND ASSESSMENT OF ALL INSTALLEDPLANTS SHALL BE USED TO EVALUATE PERCENT SURVIVAL. THE RATIONALEFOR POOR CONDITIONS, IF PRESENT, WILL BE DETERMINED TO THE EXTENTFEASIBLE.THE PERCENT COVERAGE PROVIDED BY INSTALLED PLANT SPECIES (ALLYEARS). INSTALLED PLANT STOCK PERCENT COVERAGE SHALL BE ASSESSEDUSING APPROPRIATELY SIZED SAMPLE PLOTS OR LINE INTERCEPT TRANSECTS.THE SPECIES COMPOSITION OF AND PERCENT COVERAGE PROVIDED BYNOXIOUS WEED SPECIES (ALL YEARS). SPECIES COMPOSITION AND PERCENTCOVERAGE BY NOXIOUS WEEDS SHALL BE ASSESSED USING SAMPLE PLOTS ORLINE INTERCEPT TRANSECTS .IN ADDITION TO THE DATA COLLECTION AND ANALYSIS REGARDING PLANTCOMMUNITY CONDITIONS, PHOTOGRAPHS OF ENHANCED STREAM BUFFER AREASSHALL BE TAKEN FROM THE PERMANENT PHOTO POINTS ESTABLISHED DURING THEAS‐BUILT.THE RESULTS OF EACH ANNUAL MONITORING SHALL BE SUMMARIZED IN AWRITTEN REPORT AND SUBMITTED TO THE CITY OF RENTON NO LATER THANOCTOBER 31 OF THE RESPECTIVE MONITORING YEAR.CONTINGENCY PLANSHOULD ANY MONITORING ASSESSMENT REVEAL THAT THE PERFORMANCESTANDARDS FOR THE RESPECTIVE YEAR ARE NOT SATISFIED, THE PERMITTEE SHALLWORK WITH THE CITY OF RENTON TO DEVELOP A CONTINGENCY PLAN TO ADDRESSTHE DEFICIENCY(IES). CONTINGENCY PLANS CAN INCLUDE, BUT ARE NOT LIMITED TO,THE FOLLOWING ACTIONS:1. ADDITIONAL PLANT INSTALLATION;2. EROSION CONTROL;3. HERBIVORY PROTECTION;4. MODIFICATION TO THE IRRIGATION REGIME; AND/OR5. PLANT SUBSTITUTIONS OF TYPE, SIZE, QUANTITY, AND LOCATION.SUCH CONTINGENCY PLAN SHALL BE SUBMITTED TO THE CITY OF RENTON NO LATERTHAN JANUARY 31 OF ANY YEAR WHEN DEFICIENCIES ARE DISCOVERED. UNLESSOTHERWISE APPROVED BY THE CITY OF RENTON, ACTIONS SPECIFIED ON ANAPPROVED CONTINGENCY PLAN MUST BE COMPLETED WITHIN 60 DAYS. IF THEFAILURE IS SUBSTANTIAL, THE CITY OF RENTON MAY EXTEND THE COMPLIANCEMONITORING PERIOD FOR THE STREAM BUFFER ENHANCEMENT WORK.MAINTENANCE PLANTHIS SECTION PROVIDES A GENERAL OVERVIEW OF THE MAINTENANCE PROGRAMNECESSARY TO ENSURE THE PERFORMANCE STANDARDS ESTABLISHED FOR THIS PLANARE SATISFIED.NOXIOUS WEED CONTROLFOLLOWING PLANT INSTALLATION AND AT REGULAR INTERVALS DURING THEMONITORING PERIOD, NOXIOUS WEED CONTROL SHALL OCCUR ON A SPOTTREATMENT BASIS WITHIN THE AREAS SHOWN IN DETAIL 1‐1 AND PER THESPECIFICATIONS DESCRIBED IN DETAIL 1‐1.GENERAL MAINTENANCEINSTALLED PLANTS SHALL BE MAINTAINED AT REGULAR INTERVALS DURING THEMONITORING PERIOD TO PROMOTE THE SUCCESSFUL ESTABLISHMENT AND VIGOROUSGROWTH OF INSTALLED PLANTS.GENERAL MAINTENANCE SHALL INCLUDE:WEEDING THE BASE OF EACH INSTALLED PLANT.RE‐APPLYING BARK MULCH TO MAINTAIN A 6" MINIMUM APPLIED THICKNESS ‐YEAR 1 ONLY.THE PRUNING OF INSTALLED PLANTS TO REMOVE DEAD WOOD AND PROMOTEVIGOROUS PLANT GROWTH AND PROPER FORM.THE REPLACEMENT OF PLANTS IN DISTRESS AND/OR THAT ARE DISEASED.THE REMOVAL OF TRASH, LITTER, AND/OR OTHER NON‐DECOMPOSING DEBRIS.TEMPORARY IRRIGATIONTEMPORARY IRRIGATION SHALL BE PROVIDED FOR TWO (2) GROWING SEASONSFOLLOWING PLANT INSTALLATION PER THE SPECIFICATIONS SHOWN ON THIS PLAN.PERFORMANCE STANDARDS:100% SURVIVAL BY INSTALLED PLANT STOCK AFTER THE FIRST GROWING SEASON. THISSTANDARD CAN BE ACHIEVED STRICTLY THROUGH SURVIVAL OR THROUGH ACOMBINATION OF SURVIVAL AND PLANT REPLACEMENT.80% SURVIVAL BY INSTALLED PLANT STOCK AFTER THE SECOND GROWING SEASON.60% AVERAGE COVERAGE BY NATIVE WOODY PLANT SPECIES AFTER THE FIFTH GROWINGSEASON. UP TO 20% OF THE NATIVE WOODY PLANT SPECIES COVERAGE MAY BECOMPRISED OF DESIRABLE NATIVE COLONIZING SPECIES.LESS THAN 10% COVERAGE BY ALL CLASS "A", "B", AND "C" NOXIOUS WEEDS (INCLUDINGNON‐REGULATED "B" AND "C" NOXIOUS WEEDS) IDENTIFIED ON THE LATEST KING COUNTYNOXIOUS WEED LIST.MONITORING PLAN & MAINTENANCE PLANNATIVE SOILCUT CIRCLING ROOTSAND SPREAD OR"BUTTERFLY" ROOTBALL. MIN. 1.5 TIMES THEWIDTH OF THE ROOTBALLBACKFILL WITH NATIVESOIL. COMPACT BY HAND.PLACE TOP OF ROOTBALL1 INCH ABOVE THE LEVELOF NATIVE SOIL. BEFOREMULCH, POTTING SOILSHOULD BE VISIBLE.MULCH AT BASE OF PLANT(6" MINIMUM THICKNESS)PLACE TOP OF ROOTBALL1 INCH ABOVE THE LEVELOF NATIVE SOIL. BEFOREMULCH, POTTING SOILSHOULD BE VISIBLE.CUT CIRCLING ROOTSAND SPREAD OR"BUTTERFLY" ROOTBALL.MULCH AT BASE OF PLANT(6" MINIMUM THICKNESS)NATIVE SOILBACKFILL WITH NATIVESOIL. COMPACT BY HAND. MIN. 1.5 TIMES THEWIDTH OF THE ROOTBALLPLANT INSTALLATION DETAILS22NO SCALEMULCH SPECIFICATION:MULCH SHALL BE COMMERCIALLY AVAILABLE "DOT WOOD CHIP MULCH"(WWW.PACIFICTOPSOILS.COM; 425‐337‐2700), ARBORIST CHIPS, OR APPROVED EQUAL.MULCH SHALL NOT CONTAIN RESIN, TANNIN, OR OTHER COMPOUNDS IN QUANTITIESTHAT WOULD BE DETRIMENTAL TO PLANT LIFE. MULCH SHALL NOT BE DERIVED FROMSTUMP GRINDINGS AND SHALL NOT CONTAIN SOIL. HOG FUEL OR EQUAL IS NOTACCEPTABLE. SUBJECT TO REVIEW BY THE PLAN DESIGNER, LOCAL ARBORIST AND/ORCOMMERCIAL TREE TRIMMING COMPANIES MAY BE ALTERNATIVE ACCEPTABLE MATERIALSOURCES (WWW.CHIPDROP.IN).PLANTING SCHEMATIC NOTES:1. PROTECT AND ACCOMMODATE EXISTING NATIVE VEGETATION WITHIN EACH PLANTING AREA.2. PLANT MATERIAL QUALITY AND LOCATIONS SHALL BE INSPECTED BY THE PLAN DESIGNER PRIOR TO INSTALLATION.3. PLANT LOCATIONS SHOWN ARE APPROXIMATE. ADJUST PLANT LOCATIONS TO ACCOMMODATE SITE CONDITIONS, TO PRESERVEAND PROTECT EXISTING NATIVE VEGETATION, AND/OR PER PLAN DESIGNER AT TIME OF INSTALLATION.4. PRIOR TO PLANT INSTALLATION, CONTROL NOXIOUS WEED SPECIES ‐ SEE "NOXIOUS WEED CONTROL SPECIFICATIONS" (SHEET 1).5. SEE DETAIL 2‐2 FOR PLANT INSTALLATION DETAILS.18"12"CRITICAL AREA SIGN NOTES:1. SIGN SHALL BE .040 INCH ALUMINUM WITH BAKED ENAMEL.2. SIGN FACE SHALL BE A SILK SCREEN DESIGN ACCEPTABLE TOTHE CITY OF RENTON.3. SIGN PLATE SHALL BE GREEN IN A COLOR ACCEPTABLE TOTHE CITY OF RENTON.4. ATTACH SIGN TO FENCE USING GALVANIZED LAG BOLTS.SIGNS SHALL FACE AWAY FROM CRITICAL AREA BUFFER.IRRIGATION SHALL BE PROVIDED FOR 2 GROWING SEASONS FOLLOWING PLANT INSTALLATION.IRRIGATION SHALL BE PROVIDED BY AN ABOVE GROUND AUTOMATIC SPRINKLER OR AUTOMATICDRIP SYSTEM THAT PROVIDES A MINIMUM RAINFALL EQUIVALENT OF 1 INCH PER WEEK FROMJUNE 15 THROUGH SEPTEMBER 15. IRRIGATION SHALL BE APPLIED IN A MANNER THATMAINTAINS PLANT HEALTH, PREVENTS WILTING, AND PROMOTES DEEP PLANT ROOT SYSTEMS.TEMPORARY IRRIGATION REQUIREMENTS: SYMBOL COMMON NAME SCIENTIFIC NAME SIZE/FORM QUANTITY SPACINGDOUGLAS‐FIRPSEUDOTSUGA MENZIESII1" MIN CAL., CONTAINERIZED 58 AS‐SHOWNWESTERN REDCEDARTHUJA PLICATA1" MIN CAL., CONTAINERIZED 80 AS‐SHOWNVINE MAPLEACER CIRCINATUM2 GALLON CONTAINERIZED 47 AS‐SHOWNINDIAN PLUM OEMLERIA CERASIFORMIS2 GALLON CONTAINERIZED 80 AS‐SHOWNREDLFOWER CURRANTRIBES SANGUINEUM2 GALLON CONTAINERIZED 33 AS‐SHOWNCLUSTER ROSEROSA PISCOCARPA 2 GALLON CONTAINERIZED 51 AS‐SHOWNSALMONBERRYRUBUS SPECTABILIS2 GALLON CONTAINERIZED 43 AS‐SHOWNCOMMON SNOWBERRYSYMPHORICARPOS ALBUS2 GALLON CONTAINERIZED 68 AS‐SHOWN TOTAL 460PLANT SCHEDULE:PLANTS SHALL BE NATIVE TO THE PACIFIC NORTHWEST, PREFERABLY THE PUGET SOUND REGION OF WASHINGTON STATE. PLANTSSHALL BE PROPAGATED FROM NATIVE STOCK; NO CULTIVARS OR HORTICULTURAL VARIETIES ARE ALLOWED.PLANTS SHALL BE NORMAL IN PATTERN OF GROWTH, HEALTHY, WELL‐BRANCHED AND HAVE ALL LEADERS AND BUDS INTACT. TREESSHALL NOT HAVE SUNSCALDS, DISFIGURING KNOTS, FRESH CUTS OF LIMBS, DAMAGED LEADERS, AND/OR DEFORMED TRUNKS.CONTAINERIZED PLANT STOCK SHALL BE GROWN IN A CONTAINER LONG ENOUGH TO DEVELOP A ROOT SYSTEM THAT REACHES THEEDGES OF THE CONTAINER IN WHICH IT HAS GROWN. TREES AND SHRUBS SHALL BE WELL ROOTED AND SHALL HAVE SUFFICIENTROOT MASS TO HOLD TOGETHER THE SOIL, IN WHICH PLANT IS GROWING, WHEN REMOVED FROM THE POT.NATIVE SOIL58" MINUS CRUSHED ROCKBACKFILL. COMPACT TO 95%MIN. DENSITYMOUND TODRAIN AWAYFROM POST6" MIN. DIA. SQUARE ORROUND ROUGH CUT WOODPOST ‐ UNTREATED (TYP)5" MIN. DIA. ROUGHCUT WOOD RAIL ‐UNTREATED (TYP)10' MAX3' MIN.12" ‐ 18"2' MIN.SPLIT RAIL FENCE NOTES:1. FENCE SHALL BE COMMERCIALLY AVAILABLE POST AND RAIL SYSTEM PER THE ABOVEMIN. SPECIFICATIONS.2. WOOD SHALL BE WESTERN REDCEDAR OR EQUAL.NON‐BUFFERCRITICAL AREABUFFERCRITICAL AREA FENCECRITICAL AREA SIGNEVERY 100 FEET(DETAIL 3).PLANT QUANTITY CALCULATIONS: PLANTING PLANT TYPE REQUIRED PER PROPOSED BYTYPE AREA & SPACING DESIGN GUIDELINES* PLAN STREAM 11,500 SF TREES (9' OC) 138 TREES 138 TREES BUFFER SHRUBS (6' OC) 322 SHRUBS 322 SHRUBS TOTAL 460 TOTAL 460* LATEST EDITION OF KING COUNTY "CRITICAL AREA MITIGATION GUIDELINES".FOR PERMITTING PURPOSES ONLYPLANTING SCHEMATIC AND PLANT SCHEDULE12DRIERWETTERHIGHERLOWER50'50'LEGEND:DOUGLAS‐FIRWESTERN REDCEDAR VINE MAPLEINDIAN PLUMREDFLOWER CURRANTCLUSTER ROSESALMONBERRYCOMMON SNOWBERRY1050snvmvmvmvmvmvmvmvmvmrfsnipipipipipipipipipipipipipipipipipsbsbsbsbsbsbsbsbsbrororororororororororororfrfrfrfrfrfrfvmsnsnsnsnsnsnsnsnsnsnsnsnsnvmiprfrosbsnN
Page 1 of2
Ed Sewall
From: Date: To:
Subject:
"Fisher, Larry D (DFW)H <Larry.Fisher@dfw.\va.gov> Monday, September 14, 2015 8:04 AM "Ed Sewall" <esewall@sewallwc.com> RE: Renton site
Ed:
That is correct. The drainage feature appears likely to have been created by stormwater runoff, and an HPA will not be required for the project.
Larry Fisher
WDFW Area Habitat Biologist
1775 12th Ave NW Suite 201
Issaquah, WA 98027
425-313-5683
FAX 425-427-0570
Cell: 425-449-6790
<'){{}}>< <')«}}><
From: Ed Sewall [mailto:esewall@sewallwc.com] Sent: Friday, September 11, 2015 10:13 AM To: Fisher, Larry D (DFW) Subject: Re: Renton site
Larry, [ just wanted to confirm with you that you will not require an HPA for the crossing of the storm drainage feature/stream with a road and footbridge that we looked at on Parcel 2923059148 earlier this week. Thanks! Ed Sewall Sewall Wetland Consulting, Inc.
(253)859-0515
From: Fisher, Larry D (DFW) Sent Tuesday, September 08, 2015 7:23 AM To: Ed Sewall Subject: RE: Renton site
OK, Ed
See you about 1:30.
Larry
From: Ed Sewall rmailto:esewall@sewallwc,com1 Sent Friday, September 04, 2015 7:51 AM To: Fisher, Larry D (DFW) Subject: Re: Renton site
How about tuesday at 1:30, that will work. I parked right where 108th connects to Benson.
Ed
From: Fisher. Larry D fDFW) Sent Thursday, September 03, 2015 4:20 PM To: Ed Sewall Subject: RE: Renton site
I can meet you next Tuesday or Thursday, preferably early afternoon, like 1:30 is preferred.
Larry Fisher
WDFW Area Habitat Biologist
1775 12th Ave NW Suite 201
Issaquah, WA 98027
425-313-5683
FAX 425-427-0570
Cell: 425-449-6790
<'){{}}>< <')«!}><
Ed:
12/21/2015
Page 2 of2
From: Ed Sewall fmailto:esewall@sewallwc,com1 Sent: Thursday, September 03, 2015 1:48 PM To: Fisher, Larry D (DFW) Subject: Renton site
Larry,
I want to see if I could meet you on a site in Renton (Parcel 2923059148) that has a ditch that looks stream like through the site. It comes out of the storm drain. I need to know if you would consider tins a stream so we know whether to apply for an hpa. The ditch enters the northeast comer of the sit from road drainage and then goes westerly through the site and into a pipe. Let me know if and when you could meet me out there.
Thanks! Ed Sewall
(253) 859-0515
12/21/2015