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HomeMy WebLinkAbout1999.09.00 - Hendricks and 30th Retention Basin Wetland Revegetation Monitoring Year 2I I I 1 I I I I I -l l J J J J J J J HenAricts and 30th Street Retention Basin \iletland Revegetation Monitoring Report Year 2 1999 Prepared for City of Port Townsend 181 Quincy Street Port Townsend, Washington 98368 Prepared by Dixie Llewellin Olympic Wetland Resources, Inc. 856 50th Street Port Townsend, Washington 98368 ?r \s$ \ss I I I -t .t I Hendricks and 30th Street Retention Basin Wetland Revegetation Monitoring September 1999 Year 2 Contents 1.0 Introduction 1.1 Project History 2.0 Methodology 2.1 Project Goals and Objectives 2.2 MonitoringMethods 2.2.I Determining Survival Rates of Trees, Shrubs, and Emergents 2.2.2 Documenting Wetland Changes With Photographs 2.3 Monitoring Schedule Table 1. Monitoring Schedule 3.0 Results and Discussion 3.1 Forested Survival 3.2 Scrub/Shrub Survival 3.3 Emergent/ Herbaceous Strvival 3.4 Salvage Effort 3.5 Species To Be Replaced Table 2. Species To Be Replaced 3.6 Weedy Species 3.7 Action Items 4.0 Summary Appendix FiguresI. Monitoring Area and Photopointsil. Tree and Herb Monitoring Form m. Shrub Monitoring Form ry Salvaged Plants Monitoring Form Photopoints V Photopoints I and 2VI Photopoints 3 and 4 Vtr Photopoints 5, 6a, 6b, and 6c VItr Hendricks Street Chronology -l J I ! .-t !J ! IJ J Hendricks and 30th Street Retention Basin Wetland Revegetation Monitoring Report Year 2 1999 1.0 Introduction This report summarizes findings from the 1999 Hendricks and 30ft Street Wetland Revesetation Monitoring project. The purpose of this report is to document the compliance to performance standards established by the City of Port Townsend for revegetation projects. All species from the original planting plan are installed on site. 1.1 Project History The City of Port Townsend constructed a stormwater retention pond in 1997 :r:'the vicinity of a small depression wetland between 29th and3Oft Street on Hendricks Street. A wetland delineation (May 1997) documented a 1,300 square foot Category Itr wetland which received stormwater from up-gradient neighborhood areas. St. Herman's of Alaska Eastem Orthodox Church was built adjacent to this wetland and has collaborated with this revegetation project. Native wetland and upland plants were salvaged from the site prior to the construction and replanted afterwards. Additional native plants which were grown in a nursery were also planted fuom 1997 to 1999. Through volunteer efforts, 64 trees, 250 shrubs, and over 170 herbaceous plants have been planted in and around this retention basin. 2.0 Methodology 2.1 Project Goals and Objectives The goals of the Hendricks and 30ft Street Revegetation Project are to use native plantings to restore the firnctions and values of the wetland/retention pond buffers, and to restore the habitat value of the site by planting diverse vegetation in the tree, shrub and herbaceous layers. Native vegetation, which is tolerant of our local climatic variations was selected for re-vegetating the site. Priority was given to species already present on the site, thus creating a continuity with the surrounding plant communities. Vegetation that was previously growing on, and adapted to the site (hawthoms, willows, sedges and roses) has been reintegrated through major salvage efforts. 2.2 Monitoring Methods The site is small enough that each individual plant can be counted. Individuals are categorized as tree, shrub, or emergent/herbaceous. Monitoring forms have been developed to record planting date, plant survivorship and condition of planted trees, shrubs, and emergents, for plants purchased at local nurseries and salvaged plants. 1 Olympic Wetland Resources, Inc. Hendricks and 30th Street Revegetation Monitoring Report Year 2 September 1999 x I,i 2.2.1 Determining Survival Rates of Trees, Shrubs, and Emergents Actual survival percentages were calculated using two methods. The first method compared numbers of plants observed against total numbers planted. The second method compared the numbers of plants observed that were alive and healthy to the total numbers observed (dead or alive). These survival rates are listed on the monitoring forms under totals. Monitoring forms for each of the plant communities are included in the Appendix (Figure [, il, and tV). 2,2.2 Documenting Wetland Changes With Photographs Six permanent photopoints were established on site to document the changes of the vegetation layer over time. A map showing photopoint locations, and the direction photographs were taken, is included in the Appendix (Figure I). Photopoints #1 through #4 consist of composites of pictures. Photopoints # 5 and #6a,6b,6c, are of the biofiltration swales and stormwater overflows. All photographs are included in the Appendix (Figure V, VI, and Vtr). 2.3 Monitoring Schedule As per City of Port Townsend monitoring requirements, this site will be monitored annually for three years after final planting is complete. Final planting was completed in 1999. Table 1. Shows the status of the monitoring schedule: Table 1. Monito Schedule 3.0 Results and Discussion The revegetation monitoring goal is to determine whether the performance standards identified by the City of Port Townsend have been met. Perfonnance standards require that the site is dominated by a cover of 85% "desirable species" with less thm 15% "weed species" 3 years after final planting. Survivorship of tree and shrub species is expected to be 80% or greater 5 years after the final the planting phase. All dead or dying plants should be replaced by the same species from the original planting plan during the appropriate season. Also all Scot's broom and reed canarygrass should be completely eliminated from the site. Data was collected on August 23, L999 by Dixie Llewelin of Olympic Wetland Resources, Inc A comprehensive count of all trees, shrubs and emergent vegetation was completed. Species with zero survival rates were not included in the average. Madrona for example, is an exceptionally difficult species to transplant and no individuals survived; it was not included in the total average. Percentage survival rates ofplants observed and survival rates ofplants planted are discussed in the section following. Olympic Wetland Resources, lnc. Hendricks and 30th Street Revegetation Monitoring Report Year 2 I J -,1 2 Spring 1999 Fall 1999 Fall 2000 Fall2001 Fall2002Monitoring schedule Fall 1998 10/98 8t99Vegetation and Habitat Photopoints 10/98 8/99 t2t98 lt/99Annual Report September 1999 3.1 Forested Survival The survival rate of trees observed was very good, at 98oh, with a survival rate of 85% for trees planted. All of the shore pines planted survived and are healthy. However several aspen were vandalized and only two of the six trees remain. Twenty serviceberry were planted and thirteen were found during this monitoring period. Many of these trees were small when planted and the weeds in many locations at the site completely covered the small plants. Mountain ash and vine maple, which were planted in April 1999, were stressed due to lack of water. The irrigation system was not activated until August25,1999. 3.2 Scrub/Shrub Survival The overall survival rate of scrubs was good 9lYo,with a moderate survival rate when counting all shrubs planted, 65%. Ingeneral, the twinberry, willow, hardhack, snowberry, and dogwood are adapting to the site. The Iargehazelnut was stressed due to lack of water and several ninebark shrubs were completely covered with weeds. In April of 1999 many small salal and kinnikinnik were introduced to the dry banks. These specimens were quite small and received no care after planting and therefore had very poor survival rates. Junipers and boxwood (mountain lover), also extremely drought tolerant species were also introduced with good survival rates. 3.3 Emergent/Herbaceous Survival Survival rate for most emergent species was excellent,l00Yo. Several planted species such as slough sedge, soft rush, water parsley, and hardstem bulrush are well established and are reproducing with signs of vigorous new growth. Species planted in the emergent pond area in 1998 that did not survive include sawbeak sedge and tapered rush. We do not recommend replacing these species since emergent species that are thriving on site are better adapted to existing conditions. Sword fem, which was planted in the upland areas, did not survive. 3.4 Salvage Effort The survival rate for salvaged plants varied according to plant type. Trees transplanted included Madrona and cherry which did not survive the transplant, however the shrubs had an excellent survival rate, at 94o/o and the emergent/herbaceous species had a good rate at 66Yo. 3.5 Species to be Replaced Species to be replaced include trees and shrubs that adapt well to the site. If species from the original plan were unable to adapt to site conditions they have been eliminated and substitutions have been made. If the planting situation is inadequate due to environmental conditions such as lack of water or poor soil, conditions, the plan will be altered accordingly while replacing the plants, by adding mulch and adjusting the inigation system. Plants that have been grown in the capillary bed can be used to replace dead or dying plants. Table 2. Shows the list of plants to be replaced: 3 Olympic Wetland Resources, Inc. Hendricks and 30th Street Revegetation Monitoring Report Year 2 September 1999 -l Table 2. Species to be Replaced CommonName ScientfficName Trees Quantrty Size Serviceberry Amelanchier alnifulia 3 3-4', Total # of trees to be replaced 3 Shrubs Hazelnut Corylus cornuta 3 3', Indian-plum Oemleria cerasifurmis )#2-5 Wax myrtle Myrica califurnica*3 atJ Oregon grape Berrberis aquifolium*4 #t Total # of shrubs to be replaced 12 3.6 Weedy Species Several species of tall grasses (orchard grass and tall fescue) along with curly dock and thistle have been identified on the site. Mowing or hand pulling these non -natives plants should be done regularly to ensure the survival of the planted species. No Scots broom or reed canarygrass were seen during the 1999 survey. 3.7 Action Items _Weed site (Fall, Spring) Mow or weed-eat areas without plants (Annually) Mulch trees and shrubs (Fall 1999) L:rigation system 1. Activate irrigation as soon as the dry season begins 2. _Check inigation regularly (at least once per month) 3. Tum off irrigation system in late fall Replace dead or dying plants 4.0 Summary The majority of salvaging, planting, and maintenance has been conducted by an all-volunteer work force. In 1998 the first phase of an inigation system was installed which included main lines and hose bibs. In 1999 the drip inigation was completed but was not activated until August 25 1999. Many trees and shrubs were stressed due to lack of water and were covered with 4 Olympic Wetland Resources, lnc. September 1999 Hendricks and 30th Street Revegetation Monitoring Report Year 2 I -t IIl weeds. Weeding and watering are recommended for three years after final planting is complete (until 2002). The survival rate for planted species is good for tree, shrub, and emergent species (98yo,9lo/, and 100%) for plants observed on site. Replacement plant recommendation are indicated in Table 2. in Section 3.6. Although compliance with performance standards for revegetation projects is determined after three years, the second year progress report for this project is very good, with very high survival rates in the tree, shrub, and emergent species. Presently the grotrnd cover in several locations on site is dominated by greater than 50%o undesirable "weed species". The goal of the performance standards after 3 years is to have less than 150% "weed species". Recommendations made in the Action Item list in Section 3.7 will help control weeds. Olympic Wetland Resources, Inc. Hendricks and 306 Street Revegetation Monitoring Report Year 2 I / Ii.l i ,j I 1) i-) 5 -,/ u/ September 1999 Figures Appendix I. Monitoring Area and Photopoints II. Tree and Herb Monitoring Form m. Shrub Monitoring Form IV Salvaged Plants Monitoring Form PhotopointsV Photopoints I and2 VI Photopoints 3 and 4 VII Photopoints 5, 6a,6b, and 6c VIII Hendricks Street Chronology Figure VIII Hendricks and 31*t Street Re-vegetation Chronology 1997 March I October 4 October 16 October 22 October 23 October 30 1998 February 2l May 16 June 16 November 7 1999 May I June August 25 Salvage Date--Removed all plants to capillary beds Volunteers spread gtass seed mixture and peat moss Planted wildflower seed (pearly everlasting, goldenrod, Douglas aster) Planted emergent, (Carex obnupta, Carex stipata, water parsley, bulrush, dogwood, willow) Added Regreen Sterile grass mix Planted 3 different species of annual non native wildflowers seeds Moved all plants from salvage beds back to site (sedges and rushes, one large hazelnut, several hawthorns, oceanspray, Nutka rose, Scoulers willow, spirea) Planting at Hendricks Street (vine maple, shore pine, sword fern, blue elderbenies, red flowering currants, hazelnut) Irrigation and water tap installed Planting (40 Slough sedge, 30 sawbeak sedge, 30 tapered rush, 30 water-parsley, l1 serviceberry, 8 hazelnut, 10 oceanspray,ll Indian plum, 7 aspen, 3 hawthorn, 2vrne maple,3 spirea,2 snowberry) Planting (5 shore prne,2 sequoia, 3 mountain ash, 10 dogwoods, 8 twinberry, 8 ninebark)l0 rose, 15 salmonberry, 11 vine maple, 20 red currant, 10 elderberry, 6 wax myrtle,20 Oregon gape) Planting (80 kinnikinnick, 10 shrubby cinquefoil, 10 junipers, 10 boxwood, I 5 evergreen huckleberry) Drip inigation system completed System checked, with additional drippers, and activated l I "J lWeaoRqlvzan To:Judy Surber From:Sam Gibboney Subject: Hendricks Street("Peeping Frog Pond") Monitoring Report Date:October 29.1999 D. Llewellin, D. Peterson 1. Please find attached the Wetland Revegetation Monitoring Report for Year 2. This documents reports on restoration efforts that have taken place since August 1998. 2. Thesurvival rates of the trees and scrub-shrub zones are againvery high. The emergent zone vegetation is doing well and that we are well on the way to meeting the performance goal of 85%o coverage by desirable species. 3. Other action items are included in the report. I will be meeting with Dave soon to discuss my workplan and how to accomplish these recommended items. 5. Please feel free to call should you have any questions. Ext. 1158 (1, CC D:\SAMVIENDRIKS\mnIr rpt bcd yr2.wpd 'ft'llendrich ond 30+h StreelPlonting Plon ond Photopointr30lh Straetpoint # 5BIOSWALE5HOR,E PINEsALALRuiHPhotoVINE MAPLEPATH/1(9SPIREASALAL\rHAZELNUT/lHAWTHORNLOVEREXI9TINGDOUGLAS FI?sPhotopoint # 1PARK AENCH WTHHONEYSUCKLE YINESTO CHURCHBIOgWALElrl5EOGE5il*. l/zPhotopoint# 4IHMELNUT{/{BIT1ER CHER,RTELDERFERN/OCEANSPR,AY^r.RED \v'HUCKLEEERY /qEDGE5WAX MYRILENINEBARKSHOREPhotopoint# 2Photopoint #6a,b,cjEMERGENC/l\ \rr (\ /1. IUrG\z-WLLOWROSECKINNIKINNIKINDIAN PLUMROSEOR,E@N GRAPETWNAERRTASPENPhtnt#39B-0078lob #:tlienl:-c-w:xr,'.i it$,gL,'i4i'#, . .+,r.rlr",9!ber 1999Fitkelftole:tith:gureI0lympic lllellond Rerourrsr, lnc.llendrickr SlreetRavired Plonting Plon856 50th ltreetPorl lownrend, lllA 98368360 385{432 I Figure II Hendricks and 30th Street Vegetation Monitoring Form Planted Tree Common Name Scientific Name Totals Totals * New species added to original planting plan. ** Total plant count includes both salvaged and nursery plants. (1) ct A RI e as coo)a cl .E a \oo\ )= t, (J\llO\6iJ o\ o\G,ts-o.trtr\' .r .:EE€.!r(l)(D.HLIv(l)c)E_8 3cnooIt tt +t Ec).tt.1,0) a Date: August 23,1999 Observer: D.Llewellin, Olympic Wetland Resources, Inc. Comments trees all vandalized soon after Comments Figure II q)EG'(l)A I I I I.I 98o/o 85o/o l00o/o 65oh ll 2 I l3 0 ll 3 I 0 2 3 3 s/t6/98 Vine maple Acer circinatum tU7/98 Serviceberry A me I a nc hi e r al nifol i a * s/t6198 Madrona Arbutus menziesii* 5/16t98 Shore pine Pinus contorta tU7/98 Quaking aspen Populus tremuloides tU7/98 Bitter cherry Prunus emarginata* 4ll/99 Sequoia Sequoia sempervirens* 4/t/99 Mountain ash Sorbus scopulina* t2 4 t2 92%92%Additional larse trees added in 1999. appear healthv 20 l6 l3 t00%65o/o Original plants small and covered with weeds 0 0 0 Transplants did not survive ll 6 ll r00%t00%All plants healthy 6 6 3 l00o/o s0% l0 l0 0 Young trees all vandalized the first year 2 N/A 2 100%l00o/o Healthy 3 N/A 3 t00%100%Stressed from lack of water, system online August 25,99 2/2t/98 Slough sedge Carex obnupta tt/7/98 Sawbeak sedge Carex stipata* tU7/98 Tapered rush Juncus acuminatus* 2/2t/98 Soft rush funcus elfusus 4tr/99 Orange honeysuckle Lonicera ciliosa* 4/t/99 Hairy honeysuckle Lonicero hispidula* t0/22t97 Water parsley Oenanthe sarmentoso* 5/r6198 Sword fern Polystichum munitum** t0/22/97 Hardstem bulrush Scirpus acutus 20 0 0 4 N N 45 0 40 2A t7 20 l00o/o l00o/o Once established this species will spread rapidlv 30 30 0 0o/o Not present:this year 30 30 0%Not present this year 2 2 4 100%200o/o This species will spread 5 0%Not planted: 5 0o/o Not planted 50 40 45 l00o/o 90%This speoies will spread l0 3 0 0o/o Did not sulive the transplant, site too dry 20 20 40 rcO%200%Extremely healthy and spreading I I/ Monitoring 1999 Figure III Hendricks and 30th Street Vegetation Monitoring Form Shrub Common Name Scientific Name Totals * New species added to original planting plan. ** Total plant count includes both salvaged and nursery plants. !(, ftl Lo {fi.,a (! P (t) 00 0\O\ O\60\ Eocnu1c) +ra Observer: D.Llewellin, Olympic Wetland Resources, [nc. Date: August 23,1999 Comments I I 1 II gloh 650/0 Figure III 40 N/A 3 67%5o/o Very small plants did not survive, poor soil and no water 20 N/A 65%t6 8t%Good location, needs more care until established l0 N/A 9 l00o/o 90%Healthy. sisns of deer grazing 9 8 3 67%22%Sufferine from lack of water and weed cover ll l0 8 l00o/o 73%Healthy. population from original stock spreading 40 N/A 7 29%5%Received no care after planting, hish mortality t4 t4 t4 93%93%Small plants, mostly healthy l0 N/A 9 90o/ol00o/o Small plants, mostly healthy 8 N/A 8 t00%l00o/o Good species for this location 6 N/A I 100%r7%Only plant observed was stressed 4 I I 100%25%Poor survival rate due to weeds and lack of water l0 N/A 9 78%70%Survival good 8 N/A t0 l00o/o t25%Covered with dense weeds l0 N/A 7 t00%70o/o Healthy, good location l0 l0 5 t00%5A%Plant that were located were stressed due to lack of water 8 7 8 t00%l00o/o Once established these plants will spread l5 N/A 0 0o/o 0o/o Did not transplant 3 3 3 t00%100%Well adapted to this site l0 l0 7 t00%70o/o Located in hieh traffic location 5 5 5 100%t00%Healthy will spread l00o/o444100%Well adapted to this dry location on site l5 N/A 2 t00%t3%Small plants did not receive care after transplanting 6^t99 Kinnikinnik A r c t o s t a p hy I os tu a -ur s i * 51v99 Oregon grape Berrberis aquifolium* 51U99 Red-osier dogwood Cornus sericea* 5lt6198 Hazelnut Corylus cornuta** 97198 Douglas' hawthorn Crataequs dousiasii 6^t99 Salal Gaultheria shallon* 97t98 Ocean-spray Holodiscus discolor** 61v99 Juniper Juniperus communis* 5lll99 Black twinbeny Lonicera involucrata+ 5lt/99 Wax mWle Myrica californica* 51U99 Indian plum Oe mler ia ceras iformis * 61v99 Mountain lover Paxistima myrsinites* slU99 Pacific ninebark P hys ocarpus capitatus * 61v99 Shrubby cinquefoil P otent i I la fruit icos a * 5lt6198 Red currant Ribes sanguineunt 212U98 Nootka rose Rosa ntttkana** slU99 Salmonberry Rubus spectabilis* 5/t6198 Scoulers willow Salix scouleriana 5lt6/98 Blue elderberry Sambttctts cerulea slt6198 Hardhack (Spirea)Spiraea douglasii 2l2ll98 Snowberry Symphoricarpos albus 6/v99 Evergreen huckleberry Vaccinittm ovctttutt* ,,3 l3 2 9 2 2 I 8 2 5 l3 I 9 I 8 I I I 7 ) l0 2 7 5 8 0 3 7 5 4 2 Monitoring 1999 Figure IV Salvaged Plants Returned to Hendricks and 30th Street Common Name Scientific Name Totals Shrub Totals Tree 2/2U98 Madrona Arbutus menziesii 2/2U98 Bitter cherry Prunus emarginata Totals .c,o EA RI tstt) \co\ €o L0)u) o 6 E5as o\0\o\ A rt{) E() .r1Eors €o\o\ trrt!) Ec,oso+t €o0l)G' fila1t €efr€{#,4 Obsener: D. Llewellin, Olyrnpic Wetland Resourcesr lnc. @ Comments 660/o 1060/" 94o/o 93o/o I I I t ! I I IJ .ii Figure IV 2l2ll98 Sloueh sedge Carex obnupta 2/2U98 Soft Rush Juncus effusus 212U98 Sword fem Polystichum munitum 20 t7 T7 20 l00o/o l t8%These plants will spread, healthy 4 2 )4 l00o/o 200%Transplants very hoalthy* 0 I 0 0 0%0%Did not suryive 2t2u98 Hazelnut Corylus cornuta 2/2U98 Douglas'hawthom Crataews dougiasii 212u98 Ocean-spray Holodiscus discolor 2l2ll98 Nootka rose Rosa nutlcana 2t2U98 Scouler willow Salix scouleriana 212v98 Hardhack (Spirea)Spiraea dougldsii 212u98 Snowberry SJtmphoricarpos albus I I I I t00%l00o/o Large clump stressed due to lack of water 8 1l 10 l0 80%73o/o Native population and salvaged plants healthy 4 I 5 I 5 80o/o 80o/o Some additional plants added with last planting 5/99 8 8 8 8 100%t00%Once established will spread 3 3 2 3 l00o/o 100%Healthy, can withstand droucht 5 5 5 5 rcO%100%Plants healthy 4 4 3 4 l00o/o 100%Additional plants included in last plantine 5/99 0 2 0 0 0%0%Does not transplant well 0 3 0 0 0%0%Does not transplant well rPercentages greater than 100% represent population that are spreading Oo/o OV" Monitoring 1999 Hendricks and 30th Street Fhotopoints #t and #2 August tr999 ,r, TlL__-l_.. -i .F ffi;ffii.,r$'r',''f_! i. 'rl', :1r.. *.sa a-:llJir:' lri";:' Photopoint #1 East View From Church .# '9' :i at t * *';ft ar f a .r I :l '''' '+.€F. lrrit tf'.,,+l .t p -..: Fhotopoint #2 Retention Fond Olympic Wetland Resowces, Inc. I Figure V. Hendricks and 30th Street Photopoints #3 and*A August 1999 Photopoint #3 North View From Top Of Mound Olympic Wetland Resources, Inc. Photopoint #4 West View Figure VI. Hendricks and 30th Street Photopoints #5 and #6a,6b, and 6c August 1999 i .....":! Photopoint #64 L ') l ; 't: "r'' ,'*' ii .\ .E t l;:i "li-jia i .1.."t.-i{L, Photopoint #5 Biofiltration Swale t; . Jl. Olympio Wetland Resources, Inc.Photopoint #6b Photopoint #6c Figure VII.