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HomeMy Public PortalAbout20231003 - Lake Maspenock Weed Management & Control Advisory Group - AgendaLake Maspenock Weed Management and Control Advisory Group Meeting Tuesday,October 3,2023* 5:00 PM EST Via ZOOM Join Zoom Meeting https://us02web.zoom.us/j/82765604835?pwd=NHRlRk9hdWpSMWs1S2k4dHVkdGlFZz09 Meeting ID:827 6560 4835 Passcode:141691 One tap mobile +13126266799,,82765604835#US (Chicago) +16468769923,,82765604835#US (New York) Agenda 5:00 PM Call to Order 5:05 PM Review and approval of October 27,2022 meeting minutes. 5:10 PM Discussion of 8/31/23 lake survey results and Mitchell report regarding same Discussion of next steps and timing regarding proposal for weed management plan. 5:30 PM Date of next meeting. 5:35 PM Adjourn *Note:Public meeting was rescheduled from September 27,2023 to October 3,2023 because of technical difficulties. September 12, 2023 Kerry Reed, Director of Department of Public Works PO Box 209 Hopkinton, MA 01748 RE: Summary of August 2023 Lake Maspenock Aquatic Vegetation Survey Dear DPW Director Reed, This letter provides a summary of the results and data from the Lake Maspenock aquatic vegetation survey conducted on August 31, 2023. This information documents the current status of the aquatic vegetation community in Lake Maspenock (the "Lake") in late summer 2023. These data and analyses are part of the on -going monitoring conducted by members of the Lake Maspenock Citizens Input Group (the "CIG") and assisted by volunteers to provide information central to effective lake management activities. For the August survey, volunteers included captain Joseph Baldiga accompanied by Bill Baldiga, Sarah Baldiga, and Sabine St. Pierre. John Cardillo, staff photographer for the Hopkinton Independent, was also on board. Two Hopkinton Conservation Commission members (Melissa Recos and Ed Harrow) were present for a partial tour of the lake. The aquatic vegetation survey visits pre -determined sampling stations twice a year (late spring and late summer) to monitor seasonal lake vegetation growth. Table 1 provides a list of the standard sampling locations with their approximate GPS locations. Locations of the monitoring stations in the Lake are shown on the map in Appendix A. At each vegetation monitoring station, samplers followed protocol used for previous surveys (see Appendix B), with observations of total water depth, Secchi disk transparency (SDT) depth, weed species present, areal coverage via visual observations with an AquaScope viewer, and relative species density via replicate tosses of a "weed rake." At some deeper stations, it was not possible to accurately estimate areal coverage on the bottom due to water column turbidity obscuring the bottom. Raw data and field notes were recorded on standardized forms and are provided in Appendix C (see attachment). The August 2023 vegetation survey visited 11 sampling locations. Results of the survey are provided in Table 1 with summary station conditions color -coded according to the density key at the bottom of the table. Lake water level was up as compared to 2022 conditions. Water clarity was generally good with Secchi disk transparency (SDT) depth measurements to the bottom in most locations. The SDT reading at three deep stations ranged from 6.8 to 10.2 ft with an average of 8.3 ft. LM Aquatic Veg. Survey August 2023 Report - Draft Page 1 Table 1 shows that seven species of aquatic vegetation were identified in the survey (see Table 1 for scientific names). All these species have been previously detected in the Lake. The two most common species were: European naiad (located in 10 of 11 survey locations) with tape grass and bladderwort (found at 9 of 11 locations). Detected at lesser frequencies were largeleaf pondweed (6 stations), variable milfoil (3 stations), and fanwort and waterweed (2 stations). As indicated in Table 1, survey stations ranged from light to heavy vegetation including invasive species with greatest growth in the shallower North Basin. As noted in the June report, the growth of sprigs of largeleaf pond weed continued to display elongation of stems and smaller leaf growth than prior seasons for unknown reasons. General observations for late summer 2023 indicate that the coverage and density aquatic weeds have increased significantly from the spring survey with biomass higher in the water column. While macrophyte conditions in June was light throughout the lake, the August survey indicated moderate to dense conditions in many locations in the North Basin (NB/CL, NB/C, NB/WB, and NB/NWI) as well as at select spots in the South Basin (SB/SB and SB/ECs) including moderate to dense patches of invasive species (EN, VMf, and FW). Macrophyte growth was also found at NSI (near boat launch) where none was detected in June 2023. Overall, the results of the August survey reflect both the expected seasonal increase in vegetation during the growing season as well as indicate that macrophyte growth in the North Basin is incompletely controlled by drawdown. Comparison to the August 2022 survey results show very similar patterns of moderate to dense growth in the central North Basin. Based on those 2022 results, the CIG proposed application of aquatic herbicide in early summer 2023. However, due to unexpecting bidding issues with the vendor, no work was proposed. Accordingly, application of aquatic herbicide should be seriously re- considered for treatment in early summer 2024, pending Conservation Commission review and approval. Please review this letter and accompanying data and documents and let me know if you have any questions or need further clarification. Sincerely, ()An, //4/64,a David F. Mitchell, Ph.D., CLM LM Aquatic Veg. Survey August 2023 Report - Draft Page 2 Table 1. Lake Maspen ock Aquatic Vegetation Survey Results (8/31/23) Aquatic Species Observed Aquatic Vegetation Density Code Stati on General Description Latitude Longitude Depth (ft) SOT (ft) BW EN FW LLP Nit RLP TG VMf WW Relati ve Density North Basin: East Cove / West N B/EC Main St . N 42 0 12' 25" W 71 ° 33' 18 " 4 .0 4.0 (TB) X X - X - - X X - VMf, LLP a nd BW- sparse; EN and TG -trace. North Basin: West Main St. EN and LLP - moderate; BW, VMf, and TG- NB/CL Cartop Launch N 42° 12' 17"+! 71° 33' 31" 6.9 6.9 (TB) X X - X_ - X X - trace. NB/C N 42° 12' 11" W 71 ° 33' 187" 7 .5 7.5 (TB) X X - X - - X - - EN - dense; TG -moderate; BW - sparse and North Basin: central location LLP - trace . EN and TG - moderate to sparse; 8W a nd LLP - NB/WB North Basin: West Bank N 42° 12' 05" W 71° 33' 36" 6.0 6.0 (TB) X X - X - - X - - trace. North Basin; north of Woody NB/NWI )stand N 42° 12' 00" W 71 ° 33' 23" 5 .1 4 .8 X X - X - - X - - EN and FW- moderate to sparse, BW - sparse. NB/BWI North Basin; below Woody Island N 42° 11' 56" W 71° 33' 15" 7 .9 6.8 X X X _ _ _ _ _ _ EN - moderate to sparse; TP - sparse and BW- trace. NSI North of Sandy Island N 42° 11' 52" W 71 ° 33' 16 " 4.4 4.4 (TB) - X - - - - X - - EN - moderate to sparse: and TP - trace, SB/SB South Basin; South Bank, Sandy Island N 42° 11' 48" W 71° 33' 19" 10.0 9.0 X - X X - - XXX WW and BW- moderate; FW -sparse; VMf and TG; sparse to trace; LLP - trace . SB/EC. s South Basin; East Cove, south of rock pile N 42° 11' 11" W 71 ° 33' 16" 7.6 7.6 (TB) X X X X - - X - - FW - moderate; EN - moderate to sparse; BW and TG- sparse; and LLP - trace. SB/WC South Basin; West Cove N 42° 11' 08" W 71° 33' 19 " 13.9 10 .2 X X - - - - - - X BW and EN - sparse; WW -trace. SB/Dam South Basin; north of dam N 42° 10' 57" W 71° 33' 16" 6 .2 6.2 (TB) - X - - - - X - - TG- sparse to trace; EN - trace. Code Co mmon Name Scientific Name Indigenous? Invasiv e? Color Code for Relative Co verage BW Bladderwortspp. Utriculario spp. Yes No EN European naiad Najosspp. No Yes = Little to no invasive species and/or trace to sparse cover FW Fanwort Cabomba carolinio No Yes LLP Largeleaf Pondweed Potamogeton omplijolius Yes = Invasives present at low -moderate levels; moderate cover Nit Nitella(macroalgae) N itella spp. Yes No RLP Ribbonleaf Pondweed Potamogeton epihydrus Yes No = Invasives co -dominant; moderate -heavy; some impacts TG Tape grass Valisnaria a mericana Yes Opportunistic VMf Variable milfoil Myriophyllum heterophyllum No Yes = Invasives dominant, severe recreati onal impacts WW Waterweed Elodea canadensis Yes No LM Aquatic Veg. Survey August 2023 Report - Draft Page 3 APPENDIX A Locations of Lake Maspenock Aquatic Vegetation Survey Stations . • lr f : . , r j • ./.'� . % • • f` , • • Ls; -r mix • it . Nsms • • • • • f elm %a s• +'�1I♦Fvtlois 46 LM Aquatic Veg. Survey August 2023 Report - Draft Page 4 APPENDIX B General Lake Maspenock Aquatic Vegetation Survey Sampling Protocol 1. Motor to sampling station on map using GPS and depth as guide. Note that sampling stations have been recoded, using Station Code sheet for correct abbreviations. This will be entered on the Monitoring form (one each per station). 2. On station, anchor boat and make final GPS coordinate and get total depth, enter station code on Monitoring Form as well as date and sampling crew. 3. If total depth > 10 ft, take a Secchi disk reading on "shady side" using aqua -viewer. The Secchi disk transparency depth is the average of the depth at which you lose sight of the disk and the depth at which you reacquire it. 4. Using aqua -viewer do two 1 -minute assessment of bottom coverage; one from each side of boat. Estimate overall coverage, dominant weed species, and their individual coverage 5. Conduct first 35 ft first weed rake toss (make sure there is plenty of clearage and make sure that someone is holding on the other end !) 6. On the monitoring form, record overall density (see guide) and density of the dominant species retrieved. 7. Conduct replicate weed rake toss (in another direction from boat) and record observations. If the values are the same of a species (circle) the first data. Otherwise, fill in form. 8. If new plant species are found, place in Ziploc bags with water and place in cooler for later identification. 9. Add any additional relevant observations on station location on monitoring form. 10. Motor to next station and continue survey. LM Aquatic Veg. Survey August 2023 Report - Draft Page 5 APPENDIX C Lake Maspenock Aquatic Vegetation Survey August 2023 — Raw Data Sheets LM Aquatic Veg. Survey August 2023 Report - Draft Page 6 Monitoring Site N o.: t4S /Ec Sampler Name: B GPS Location N 4t o 1 t' 25 r Total Depth (ft): y. w 70'791f 19 u JS= J,t Berd c. 5.5v 5.Wot ee e.. = Dave_ Mt d- e.4eI( S a s $w�rwk 8gldii 4 PO:- Tea t? ,1d,e2e Survey I)at c: W31)23 SDT D epth (ft): Li .o us) Plant Name Variable nfilloil Fanwort Naiad I .:gcria Large leaf ponclweecl Ribbon -leaf Po ndvvee l I'f)nclweed A I'anctwCC(1 13 I. :Iodca bVilcl Celery (tahcgrass) 131ac1cicrwc)rl Nitella Naps til)l). White ‘vaterlily Yello w kvateriily 1.Vateishicicf 1 Jnkno vn I t.lirknown 2 l' ilameillous Algae Attached .'1lgac Coverage code: 1=5-25% 2=26-50% 3= 51-75% 4 = 76-1ari% Density corm: T = trace = sparse l'u? = medium D = dense Aquatic Vegetation crage Aquatic `'vegetation Density ( )I3S. .I ( )!3S. 02 r r1tti. (rl;ti.;t1 ORS ./12 (rf;ti. 7-0 0 tl &rk tr. . cc? 4+ see. b 1tr0+f'^ '',11V "t Nt.(1l(1k)t is f al,r P la1:4110C1< C1)0 31hVI Slim}-SP131.;" t 1't\'()f:,t ,Ml} I• MetICL- M onitoring Site No. w UPS Location N a Zf 11- w 7(' 33' 3t Saltlptte±- Name: otal Depth (ft): ) Joe Se /d i le, SS: S ib;. v, S uva JM = wav e- Ott1f-e4e/! Survey I)atc: 5W3,i23 SDI Depth (ft): Ea.41 (T g) Plant Millie t/ariahle mil foil I'anw(rl Naiad 1'.gerta I . i)rge leaf po ol 11t'eed Ribbo n-ie,1t'Potulwe i I)On(1wee(I A I)Onclwee 113 1'.1ode Wild (eiei (tiwegrass l; l i1(I(1erwo rt Nitella Naps SI)J). White water! iEy Yellokv tvatcritly Wittersli1e1(1 1 Jllknow'n I tJnknuwn 2 ' 1.ilanUCntu uti Algae Attached Algae Aquatic \'egetation Coverage Aquatic Vegetation e)ensit} (OS. ai Oi3ti, r: , (Iitti, rlj i )13S . 1/4 -r ( )Rs . 11 t )IKS h4 50 o7® O bservations: To'v jr b7 -301„n Ccerditio - Tho irOgy.ile" HaPkar��DV^ ..-�►•tcr� Colerage c€ide: 1=5-25% 2=23-50% 3=51-75% 4 = 76-1100% L'ensity code: T= trace 6= sparse Wi = mediat e ID =dense • p akr klaTcI //• k 1. c /!c'ltiUo'.'I -SI't)t.iatf%C31 1. l• 1. Monitoring Site N. 0210 f u GPS Lo cation N-411° 12- i 0 w it 33t 11" Plant Name \lariat)le nlilloi1 1'anwo rt Naiad I'. geria I .arge leaf }x)n(iweed R I I)lt()I1-Ieit 1 Pondwee(I I W1(1Wee(I ,\ Ponclwee(I 13 I :Io dea Wild Celery (lal)egrasti) 131a(I(lei• vo 1' t Nitella Naps 4I11). White watcrlily 'y ellow vs•aterlih' w atcrsIluek(1 Unkno wn I Unknown 2 Filamentous Algae Attached .Tae Sampler Name: Total Depth (ft): 7. J $ = 0 •c. ISci left VA. Pth = D u- Mt1>-�b�lst BB sO sun,. 1)„, /31123 SDT Depth (ft): 7.4.- Cr.) AgttfitiC Vneitti- h n ( -alvr.a-nOts Aquatic Vegetation Density t OBS . ,I2 UI1ti ',, ()RS, !'4 ( )hservations: k* hoe te/ «1tre 17 Po%dee, 11 1,44_11,41, tip t0-6 an a4..kea .F Coverage code: 1=5-25% 2 =26-5O% 3 = 51-75% 4 = 76-100% Density cede: T = trace 5=sparse I:d = medium D =dense akc (:!.mock \ cgetauoa tittrTry-!-,{'f)1.N4I 11 \\;L 3 I 1 .,. Monitcirin!2 Site No . GPS Location Vi vi se Iv 42® Its S' w 1t e 73' 96 Sampler Name: Total Depth (ft): 4.0 Jis= O.e $ 1do qo. SS= Sxy;.eu, 54" nav e. Mittj%eIP .3Q S$ Stir, & I),IIc: g/3,J23 SDT Depth (ft): 6.0 (T/ Plant Name Variable mind 1 anwort Naiad 1'.geria 1.argc lca 1pondweecl Ribbon-Icaf t'o ndwccd I ondwced A 1'OndwCCci B 1 1tidea 'iltl Celery (tapcg'rass) 131si(lt1CI'\ (lrt Nitella Najas sl'h. White t\`aterlily 'Yello w ' 'aterlily Watershicitl Unknown 1 Unknown 2 Filamentous Algae Attached Algae Aquatic i +o\ erage UI3S. ; t ORS . !;' (1fIS . r!1 ow; ;$4 1 t� „ "- — i1([llstti6: Vegetation Density' ( IBS. ;II ()BS. in (IliS. a; ( MS. Ira 2 S.% cm qtr '•- v :s. I4 vock,t O bservatio ns: Goliefage code: 1=5-25% 2=25-50% 3 = 51-75% 4= 76-1OCt% Density code: T = trace S= sparse M = medium D =dense 1 ake M ptncn:k' egctatuuu Survey -Sig )1.NS1f `z Vt'()Rl-:wfft ! 1.sf4 I p � Moititorinu Site N. N7/19W r (3PS Locati on N %1t.� II � 5t; w '71 " 33` IS" Sampler Name.: otai Depth (ft): J d6 - car e. 66 Yd k (J = Dsu - Met-tie11 r Sun« • f lute: SDT Depth (ft): b°1 8M23 1 Plant Name Variahle ntil)iri1 1•amvurt Naiad I . gcria 1.arge lea r 1 on(i\veeci Ribbon -leaf I'u nclweecl I'unclweecl I'unclwee(1 13 I it)dC a Wild Celery (tapegrass) lilaciclerwurt Nitella Najas :111). White waterlily Yellow waterlily Watcrsltielcl t Ink!) own I lnkn(twn 2 Filamentous Algae Attached Aquatic Vegetation ('or`erage (MS. 1 1 OHS. 1;2 )ttti. ;11 ()BS. 1#4 $ Observ ations: Sw v1 (5;A t(. Coverage cod: 5 1= 5-25% 2= 26-50% 3 = 51-75% 4= 76-406% Aquatic Vegetation Density OIiS. r(I ()B,;. Oltti n; ( !W a5- 51,%, stases Uen sity cock: t = trace S = sparse CV1= medium D =dense 1 AL- NItillt:rittuk \ rp.Cti1uua Sttnrv-tit`1)i.' .- -,1 t t,i Oir;; •a 'I Monitoring Site N o.: tIQ JtN GPS Locati on N Z 617.1 Z CP w 7(° 3'S D lIV' Plant Name Variable milloi1 I anwort Naiad 1'.geria large IcaI 1um(lweed R hho n1-leaf 1'(rn(hvcc(1 I'orulwcc(I A Pondwcc(I B I- :k)(ea Wild Celery (tahcgrass) 1 31a(i(lcrwOr'I Nitella Na.ja€s spp. W'lrite waierlily Yellow ‘valerlily Watershici(l Unknown I Unknown 2 Filamentous Algae Altiiche(l Algae Sampler Name: Total Depth (ft):®' J$= J•c- tsatchvie% i SS: 51t% ,we_ Mt t'j.e.i! Sl,r\Cy I)iIIC: S/3t123 • SDT Depth (ft): // .13 - Aquatic 'Vegetation Coverage Aquatic Vegetati on Density' OHS . /:I OBS. /12 ()HS . ;r; ( )115 . +r.} $-tl t )I3S. r/ I il2 1;1 TOO matt_ V. ve.SERA ()bserv atio ns: Coverage code: 1=5-25% 2=26-50% 3=5175% 4= 76-130% Density cods: I= trace S = sparse 1U = medium D =dense 1 ukt- tfaTu• rxrc4. \ eiRk tauu:, hllnry-S117I.4'.SI 1 i ,1'c)I?1 I;f I 1. 1•. Munil urinw Site :N o.: � 5� Sa!t..ptcr Name: • t• N 1 II 64, w lie 351 lb" (BPS Location Plant Nance Variable ntilti)il 1:amWurt Naiad 1 •:geria I . arge Ica I ponciw ee(i Ribbon -Ica l' P()nclwee d I'()ntl\ve'e(1 A I'OnclweC_(I 13 I :lc)cica Wild Celery (tapegrass) l ilaticlerxc)rt Niiella Najas 4i)I7. \V'!tite aterlily \vaterlily Watershie (.1 (111k110wrt Unknown 2 Filamentous Algae Attached Algae otal Depth (ft): -9 J$: O .c 3c!da DI& 5.5 v s3.i4,,a Sk �M = DAuc t t� 1►� IP AB, sq Su)r,cv pale: v/3423 SDT D epth (ft): 1''I / { 13) Aquatic Vegetatio n Coverage Aq uatic Vegetation Density (>RS.';2 ()[i5 , rr; 1 C )liti.:l l ()Bs. ;I2 oils. .1; ( )liS, 44 O bservations: r �t •-� l , rho4 s 4i►kc r, Coverage code: 1= 5-25% 2 =26-50% 3 = 51-75% 4 _ /6-1'G% Density code: = trace 5 = sparse M= medium D =dense 4tJ:'w'( `• .(SIu,I:F:: u4' 1 akr NIzi.pcoucl•; Ve:!et;tttutt t i !fit a[tt.wf t[ 1 Monit oring Site .'"ht. N31,0 GPS Location N 12 • 11' 41S" w •7 � 33' tie' Sampler Name: otal Depth (ft): S = O.e 156 ldt ote,, 55= S.0y;e. SAY ' �M r- Drive_ Me 14 ell 53, 81S survey oak:: S/3/J23 i SDT Depth (ft): i• 0 Plant Millie Variable null -oil I•ttn\. ort Naiad Igeria I . argc.' leaf po iidweecl fZ ihhoi)-lets f' l'c)nclwcecl I oii lweecl A L: iu clea Wild Celery (tahcgrass) l3liitklerw'()rt Nitella Nitliiti tiI117. White v,'aierliiv Yello w wilterlily Watershield t)nkncnvn 1 Unknown Filamentous pis Algae Attached Algae Aquatic Vegetation Cos crage ( )13S , ii-i 5 Aquatic ` .'e„etatia n $)ensit3' ( )liti..)I ( )13S . OHS. y; r.. oLa - irs•e-o s- ( )HS. '!-I ( )lase real io ns: f W VMKtr 41 Coverage code: 1=5-25% 2=26-50% 3= 51-75% 4= 76-106% Density code: 'I= trace s = sparse M = medium ©= dense '•,ii�•i•t j ii31't�:Ci (>i 1 ake \1z p rncick 1 euelatto i Sitr '->i'i)i ` ,til : 't 4t 'i)I<L 1!I I I ..:i . llcxtilurin�! Sit e No.: �1 Gs ° , r GPS Location N MI11 H ( w -1(' 33e (t' Sampler N.u nc: Total Depth (ft): 1.17 J S' L).G 15Aleh o!t. e . PM Due hte fekell Mt 513 Survcv I )alc:. S/3!123 SDT Depth (ft): 7 .G (i ) Plant Name \'.triable ntilloil I.anw:ort Naiad I ;geria Large. leaf hondwced Ribbon -leaf Pond need l'olidwced /A Po ndwce(1 13 1:lodea Wild Celery (tapegrasti) I3laddcrwo ri Nitella Najas Sj)l). 'White waierlily Yellow wqIterlily Watershield Unknown I Unknown 2 Filamento us Algae Attached Algae Observations: ervations: Aquatic N'eget<ation (overage OIiS• ::I ()Hs. i;2 (HIS . '!T (Niti, i+4 k C.-yo.wsva - ids Coverage code: 1=5-25% 2 = 26-50% 3 = 51-75% =?= 76-i'aCl% Aq uatic Vegetation IE)ensity ()US. dl ()BS. 02 ()sti . i(T OIu ff-1 Density case: T = trace = sparse IV1= medium D= dense lit ake Rla.p cn ocl: e ct:►w,ri Survey-Si'Iii.NSI IN tiltk I11 1. 1 .a• . Ri(milcirittg Site (BPS L ocation N L� Itr ®f w _t 10 33' 13 Sampler Naire: Total Depth (ft): l3.90 JS : O.e lsal do fit& SS"' L;,,. Sd PP/ = DAVL Mt fej‘ el Mb, 58 Snr,cy ttitc: 8'31123 SDT D epth (ft): b . 2 1'Iant Name Variable mill -oil Fallwort Naiad I .geria 1.argc leaffxm(iweed 1Zihhon-Icaf Pondwced Iondwecd iA I'o ndweed 13 I :1Udea Wild Celery (tapcgrass) 1;la(1(1cl-wort Nitclla Najas dill. White wateriily Yellow watertily Wtitershield t llikn(n vli 1 t.. lI1knflwn 2 • Filamentous (Algae Attached Algae ( )hscrvatio ns: Aquatic Vegetation Corerage I = trace S = sparse kVi = medium tt = dense; (MS . ;;i (iliti. 1=' (Ms, -! i ( 1+-4 Aq uatic Vegetati on Density (tliS.,tl (inS .d2 ci1tS . a; 111iS. !:a Coverage cede: 1= 5.25 2=26-50% 3 = 51«75% 4= 76130% Density cocie: te. ui I akc 1la.1)enok-h l cuetauun 1 .,:i. J $ = c.) #L VA Idt OICA . 5$ ; :1y;n. Ski' M onitoring! Site N o.: SI3 1 DA VI Sm :pkcr Name: �M ' Dave_ Me ieIJlt SOS Si; c y4 (,PS L ocation N 1i 10 6") W 1(.13` Pat' 'otal Depth (ft): 42.2 - Plant Name Variable nlilfoi1 Ianvort Naiad I . geria —Large lea I pu nd§veed Ribbon-Icat PO liwee(i I'ond§veed / I'o►td§veed B I:logien Wild Celery (tahcgrass) 13ladder§vort Nitella Naps spp. White N. vatcrlily ' eilo §valerlily Wa1crshield Unknown! I l inknO§vn Filamentous Algae Aitarhed .Algae Survey I )atc: 2/3i )23 SDT Depth (ft): 6.21 IV.) Aquatic Vegetati on ('oN erage (MS. - 1 t )liti. .' (111S .1/1 ()liti -4 5-M Aq uatic Vegetation I)ensit� ( ►liti. ;rI (tli', tdiS .7; t ►li'; '!d ( )hservat io ns: Coverage code: 1= 5-25% 2=26-50% 3=51-75% 4=76-100% Density code: T= trace S= sparse M =medium 0= dense `st►c•r( Natmlri 4r4 I :Ike i4laspenock Ve,'e au4'; Survey-SPl)1.NSI I I .el,.