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Agenda 04/21/2017
PELICAN BAY SERVICES DIVISION Municipal Services Taxing & Benefit Unit NOTICE OF PUBLIC MEETING APRIL 21, 2017 THE WATER MANAGEMENT COMMITTEE OF THE PELICAN BAY SERVICES DIVISION WILL MEET AT 1:00 PM ON FRIDAY, APRIL 21 AT THE PELICAN BAY SERVICES DIVISION, 3RD FLOOR OF THE SUNTRUST BUILDING, SUITE 302, LOCATED AT 801 LAUREL OAK DRIVE, NAPLES, FL 34108. AGENDA 1. Pledge of Allegiance 2. Roll call 3. Agenda approval 4. Approval of 01/26/17 meeting minutes 5. Audience comments 6. *North berm restoration 7. 2017 aerator installation 8. Status of recently installed aerator systems 9. *Status of bacteria and tilapia testing 10. Status of"microfloc" testing 11. Status of plantings in Avalon lake 12. Plantings and rip rap at the Oak Lake Sanctuary lake 13. *Lake bank erosion (consultant presentation) 14. Other business 15. Adjournment *indicates possible action items ANY PERSON WISHING TO SPEAK ON AN AGENDA ITEM WILL RECEIVE UP TO THREE (3) MINUTES PER ITEM TO ADDRESS THE BOARD. THE BOARD WILL SOLICIT PUBLIC COMMENTS ON SUBJECTS NOT ON THIS AGENDA AND ANY PERSON WISHING TO SPEAK WILL RECEIVE UP TO THREE (3) MINUTES. THE BOARD ENCOURAGES YOU TO SUBMIT YOUR COMMENTS IN WRITING IN ADVANCE OF THE MEETING. ANY PERSON WHO DECIDES TO APPEAL A DECISION OF THIS BOARD WILL NEED A RECORD OF THE PROCEEDING PERTAINING THERETO, AND THEREFORE MAY NEED TO ENSURE THAT A VERBATIM RECORD IS MADE,WHICH INCLUDES THE TESTIMONY AND EVIDENCE UPON WHICH THE APPEAL IS TO BE BASED. IF YOU ARE A PERSON WITH A DISABILITY WHO NEEDS AN ACCOMMODATION IN ORDER TO PARTICIPATE IN THIS MEETING YOU ARE ENTITLED TO THE PROVISION OF CERTAIN ASSISTANCE. PLEASE CONTACT THE PELICAN BAY SERVICES DIVISION AT (239) 597-1749 OR VISIT PELICANBAYSERVICESDIVISION.NET. 4/12/2017 1:05:20 PM PELICAN BAY SERVICES DIVISION WATER MANAGEMENT COMMITTEE MEETING JANUARY 26,2017 The Water Management Committee of the Pelican Bay Services Division met on Thursday, January 26 at 2:00 p.m. at the SunTrust Bank Building, 801 Laurel Oak Drive, Suite 302,Naples, Florida 34108. The following members attended. Water Management Committee Scott Streckenbein Tom Cravens, Chairman Dave Trecker Pelican Bay Services Division Staff Mary McCaughtry, Operations Analyst (absent) Neil Dorrill, Administrator (absent) Lisa Jacob, Associate Project Manager Marion Bolick, Operations Manager Barbara Shea, Recording Secretary Also Present Susan O'Brien, PBSD Board Tom Barber, Agnoli, Barber& Brundage Mike Shepherd, PBSD Board Jim Carr, Agnoli, Barber& Brundage APPROVED AGENDA (AS AMENDED) 1. Pledge of Allegiance 2. Roll call 3. Agenda approval 4. Approval of 11/18/16 meeting minutes 5. Audience comments 6. North berm restoration 7. Replacement of bahia sod at north end of the berm 8. Problems with existing solar powered aerators 9. 2017 aerator installation 10. Trial lakes report—what's working/not working 11. Status of"microfloc"testing 12. Proposal for dealing with lake bank erosion 13. Input from Collier County Presidents Council A. New Business (add-on) 14. Adjournment ROLL CALL All members were present and a quorum was established AGENDA APPROVAL Mr. Streckenbein motioned, Dr. Trecker seconded to approve the agenda as amended with the addition of item #13A, and with agenda item #12 to be discussed after agenda item #7. The motion carried unanimously. 1 Pelican Bay Services Division Water Management Committee Meeting January 26,2017 APPROVAL OF 11/18/16 MEETING MINUTES Mr. Streckenbein motioned, Dr. Trecker seconded to approve the 11/18/16 meeting minutes as presented. The motion carried unanimously. AUDIENCE COMMENTS Mr. John Hughes, President of the Avalon Community Association, requested that the PBSD install blue tilapia in Avalon's lake, instead of aerators. He commented on his community's opposition to the noise generated by an aerator. Ms. Ellie Tracy, Avalon board member, commented on the lack of littoral plantings in the Avalon lake and the severe erosion of the lake bank which has resulted in extensive irrigation pipe repairs. Ms. Anne Georger-Harris commented on the high density of residences in Avalon and her opposition to the installation of any noise-generating aerators. Dr. Trecker commented that he cannot support adding blue tilapia to an additional lake. Numerous consultants and other communities have concluded that negative consequences from blue tilapia include (1) any beneficial results from blue tilapia are transient, (2) blue tilapia will eat the lake's littoral plants, and (3) negative consequences of ammonia-rich fecal matter generated by the blue tilapia. The committee and staff agreed to put the Avalon lake aerator installation on hold and expedite littoral plantings in this lake. NORTH BERM RESTORATION & REPLACEMENT OF BAHIA SOD PROJECTS Dr. Trecker recapped two projects under consideration for a total of$86,000: (1) east side erosion of the north berm from the north tram station to the Montenero for $41,000 and (2) addition of riprap on the west side of the north berm from the Commons to the north tram station for $45,000. Our Agnoli, Barber, & Brundage consultant, Mr. Jim Can commented that the first project is a structural issue, is not an emergency, and could wait another year; the second project may be completed for aesthetic reasons. By consensus, the committee agreed that the first project should be built into the FY18 budget and the second project should be part of a master priority list of lake bank projects. PROBLEMS WITH EXISTING SOLAR POWERED AERATORS Mr. Cravens commented on staffs recorded observations of eight solar powered aerators on nine days, as provided in the agenda packet, which shows that five of these eight aerators are not functioning continuously, as designed. Mr. Bolick commented that technicians are still trouble-shooting these malfunctioning devices. The aerators have a two-year warranty on parts, one year on labor. At the recommendation of the committee, Mr. Bolick will provide an update on our aerators to the full board on Feb. 1. MR. STRECKENBEIN LEFT THE MEETING AT 3:12 PM 2017 AERATOR INSTALLATION By consensus, the committee agreed that no new aerators should be installed in 2017 until all of the existing aerators are functioning properly. 2 Pelican Bay Services Division Water Management Committee Meeting January 26,2017 TRIAL LAKES REPORT Dr. Trecker commented on his observations of the four bacteria test lakes. He commented that three out of the four test lakes appear pristine and algae free. Bacteria may not be working as well in the St. Maarten/Commons lake as this lake has no aerators. STATUS OF "MICROFLOC" TESTING Ms. Jacob reported that she has a February conference call set up with Mr. Raphael Vazquez-Burney of CH2M Hill to discuss the logistics of the microfloc testing. Mr. Bolick reported that the Club Clubhouse lake and the Naples Grande front lake have been selected for this testing. PROPOSAL FOR DEALING WITH LAKE BANK EROSION Mr. Tom Barber, our Agnoli, Barber & Brundage consultant, summarized his $37,200 proposal to provide a master priority list of lake bank erosion projects. Ms. Jacob strongly recommended this project. Mr. Bolick commented that $130,000 is currently available in the PBSD budget for lake bank erosion projects. Dr. Trecker motioned, Mr. Streckenbein seconded to recommend to the full board to do the $37,000 study by Agnoli, Barber, & Brundage. After discussion by the committee, Dr. Trecker withdrew his motion, and Mr. Streckenbein withdrew his second. By consensus, the committee agreed that Mr. Tom Barber would make a presentation to the full board on Feb. 1 regarding a proposal for a study of lake bank erosion to include 45 lakes and the berm erosion, resulting in a priority list of repair projects. INPUT FROM COLLIER COUNTY PRESIDENTS COUNCIL Dr. Trecker commented on the Collier County Presidents Council he attended with Ms. Jacob where attendees discussed their communities' successes with various lake algae control methods. He commented that some communities have experienced significant success with bacteria. Mr. Bolick commented that it is difficult to quantify the effectiveness of bacteria in PB test lakes since these lakes are also subject to chemical spraying. He commented that bacteria cost per lake is approximately $600 annually. ADJOURNMENT rhe meeting was adjourned at 3:43 p.m. Tom Cravens, Chairman Minutes approved [ ] as presented OR ] as amended ON ] date 3 Agenda Item#9 Page 1 of 1 SheaBarbara From: David Cook[merlincdc@gmail.com] Sent: Wednesday,April 19, 2017 10:52 AM To: Tom Cravens Subject: Re: Blue tilapia Tom, I can comfortably say that the Blue Tilapia have been a great assist in eliminating the algae in our lake. We added blue tilapia together with bass and blue gills -to make it a great lake for kids to fish. Also bought a few thousand mosquito fish which have almost eliminated mosquitos in our area. I would recommend working with your friendly fish supplier to buy the mixed batch of fish for the above benefits. I believe we spent about$500 for the fish and I was previously spending about $1,000 a year on beneficial microbes. With those we also did not have algae, but the expense was a recurring one. Either solution is significantly less expensive that the bubblers that the PBSD has been installing. On Wed, Apr 19, 2017 at 10:08 AM, Tom Cravens <nfn16799(2i naples.net>wrote: Greetings Dave, The PBSD water management committee is current;y in the process of evaluating the use of Blue tilapia to control algae in lakes in Pelican Bay. You have used Blue tilapia in your condos lake and we would appreciate your comments on your experience with them. Thanks. Torn Cravens 0 Virus-free.www.avg.com 1 Agenda Item#9-1 Page 1 of 1 SheaBarbara From: Pat Vlasho [patvlasho@gmail.com] Sent: Wednesday,April 19, 2017 8:45 PM To: Tom Cravens Cc: ccva Ray; CCVA Roger; philip diberardino; CCV Jim Johnson; Bob; CCV Susan Gascoigne; CCVA Charlie Pike Subject: Re: Blue tilapia The Lakes at Crown Colony Village Association have had Blue Tilapia for almost 3 years and have had no problem with Algae since CCVA placed in the Lakes. Approx. $600 cost. Thanks for your e-mail, Patty Vlasho On Wed, Apr 19, 2017 at 10:09 AM, Tom Cravens <nfn16799Anaples.net>wrote: Greetings Pat, The PBSD water management committee is current;y in the process of evaluating the use of Blue tilapia to control algae in lakes in Pelican Bay. You have used Blue tilapia in your condos lake and we would appreciate your comments on your experience with them. Thanks. Tom Cravens Patricia Vlasho, P.A. Downing-Frye Realty, Inc. Q s Virus-free.www.avq.com 1 Agenda Item#10 Page 1 of 1 From:Vazquez-Burney, Rafael/TPA [mailto:Rafael.Vazquez-Burney©CH2M.com] Sent: Wednesday,April 19, 2017 12:59 PM To: JacobLisa Cc: Gorsira, Rick/TPA Subject: Re: Microfloc Testing Budget? Dear Lisa, Rick and have discussed this. We understand Dr. Trecker's request for additional information to anticipate the cost to implement this project. I think I can explain why we did not submit a cost for the implementation and help clarify any misunderstandings. This technology(microfloc)we are intending on pilot testing at 2 lakes is a relatively new technology so there are not many test cases to reference but its success is definitely a proven concept. There are specific data required to arrive at conservative estimates that need to be assumed before implementation. For this reason,we requested to see the site and understand how and where this would be implemented so we can calculate quantities and ultimately the cost. We need to perform some detailed calculations based on lake volumes,rates of application, pump size required,tubing lengths, power requirements, alum volume,dosing rates, expected performance, adjustments required during operations, etc. There are many variables to consider as this is not an off-the-shelf item with a unit cost. We may need 25 gallons or 150 gallons of alum based on the size of the lake.Lake water quality chemistry will come into play to determine these rates and volumes.The equipment itself is relatively simple in terms of alum in drums(or other tank), small pump,tubing to deliver alum to the lake, and power to operate the pump. Some of this can be rented or purchased. We were hoping that some of this equipment may come from the WWTP onsite and other equipment could be scavenged for temporary use to reduce cost to PBSD. The operational cost is expected to be minimal from a labor cost perspective. One person(assumed PBSD staff)will need to monitor the dosing rates and check on available alum in the drums and re-supply as needed. We will provide guidance for any adjustments to application rates. Laboratory analysis by the county lab will involve twice weekly samples at startup with a decreasing frequency until we feel confident that we have reached a proper application rate to start a decrease in phosphorous concentrations.The pilot test can be run as long as PBSD is willing to collect data but phosphorous levels may drop quickly and maintain, or potentially additional applications may be required. Once this process is understood it is expected that these rates are likely applicable to all the lakes at PBSD due to similar water quality and the same equipment can be used at all lakes. Only alum would have to be replenished.This process is iterative but it will have a definitive outcome. I know I explained the process more than the actual cost but I think this does provide a sense of effort and the type of equipment involved.Depending what's available onsite from the plant,rental sources, or purchased equipment,cost can be minimal or have an initial capital expenditure but the long term use of this will make it very economical for the numerous lakes. Our plan will build confidence in terms of operation and material cost and will provide you with the facts to proceed or re-evaluate this treatment option. Our engineers have proven success with this method and we believe this is a cost-effective long term solution. If this works, quarterly water quality monitoring could be significantly reduced and only be performed at the lakes(6)that discharge to the bay and ultimately discontinued. Rick and I are both on a client site for the rest of the week,but next week we can build the materials list and cost for an initial dose. I hope this helps the committee understand that we are committed to provide a proven solution and not a commodity product with unproven results. Rafael Vazquez-Burney, PE CH2M HILL/TPA Office 813.281.7766 Cell 727.366.3301 "a--- "' -�� «.+/a.,+.,i„ H..rierwivnA0/ 0PA('.KRTS/2017/20170421-WM/20170421_wm agenda%20item%2010.htm[4/19/20172:06:23PM] .;'1,-":); •it Jl t-r �4- h ,Ir�µ., k.` j YY i i j_F � y . 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' '''''' ''''' 3.1:1 Slope ft Escrmnt �:,. 3.1:1 Slope ° 40 �, '."1,',.*'-'.1-,-;i7: i.::' fl-, : ,:„.,14;111r- ' :'- a. Esri,HERE,DeLorme,Ma.rn, nei. O c i nStreetMap contributors,and the_r.,-.,.'5' IS Jse c� r t r11t ��t�e„See ®t�} k��•: Cr.Eye Eart i7"E�eo .�il'tcti,CN Sl ll. i)Ls 1S,r USDA ) rA CD iG's ilc 1 1 ' - 4ontnlulnt Page 2 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes s+r��,�re \ .,.,.., Fair 0 10 20 40 60 80r ' Good ' N m M Feet N to roi Area ■ Natural Area ss " e C i,r<ol Erosion ritual Erosion 4',.,,'T,-'5-47,;;.:;', ' Y - _ s - lake P 4 Dab Wr9e Height r S" ��, .. 5 53.000000 y - b M-. x2.000000 A • ;Q 11 k •51.500000 ✓mAksL <1.000000 j _ ....- gyp Y '" • ,__ _,,...„.„..5,...„„......„, , . - I. Lk N �# I e # .- RIP Rap Nall w ; '°' , " ' eek meg. tike 4111k; x ,.. Ail Public Lake 1-5 „, .,,,,i 70 If 0.45 ac 3 acft I a :, : ,,,,,,,,' .‘ , Ali ''''.1*.-. 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Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes =a - = Y` ser�erure Fair 0 40 80 1 60 240 320 1.5 ft Escrmnt Good 11111 Feetll 1 Slope rural Areo 1 5 ft Escrmnt3.6 36:1 Slope�j� iii Natural Area �. *t g; � 'r Critical Erosion f Critical Erosion lit �:. 1 # bcs 1.6 ft Escrmnt " ' Height 1 SI •<_3.000000 3.6• Slope # C1.9 ft Escrmnt n rsoaaoo e f ' peg' 6.7:1 Slop 0.000000 �` , 2.1 ft EsamnTR 40' ae.rrammlar�e { 6.7:1 Slope twoRip Rap F .� •yall S„ 1.3 ft Escrmnt i , 3.6:1 Slope 4. 2.1 ft Escrmnt 74. 4.4:1 Slope . 4. ,or ' s f 1.7 fts " Escrmnt ,- ;' 4:1 Sloe Orli, r ,� p 2 ft Escrmnt , # 8 5.7:1 lope_ � rif • mad , :. 1.8 ft h Escrmnt < s> 5 ope . 1SI t a 11, .. kr. ,. a 4. F i - 1 - .0 .` ¢`X1.5 ft Escrmnt w+ e,-sr 3.6:1 Slope g r 4. ' - .% .... : .0-47- r, 4 4E . g- it Public lake 1-4. ' .;r �v � 2 ft Escrmnt r r tuft 1.6 ft X5.7:1 Slope ft Escrmnt _,,,` Escrmnt Pubt � '% 5.7:1 Slopee s=mrt k -IA Slope 3.98 ac \ ,11„ + z (Public 770 If 1-5' 3.1'1 Slope - ` 34 acft 5 cc // . 4fita ac i . . . ¶-� 0 4 3 1.6 jr Escrn,.t t 5.L' Slope III as `" 14 4 1 f t are t ke 19• % tiiimittw r - 46114 ' A .. Escrmnt sg ,,. o.le a� - .:4:1 Slope "4.. I acfr eidirt ._ . .' fi4 It 5:1 Slope ' *t yF ' a ' cAit .N. 0,2.3 ft a s s ad Escrmnt 4ai x5:1 Slope " k ' ^x 1.9 ft Escrmntr k t _ JI .» 1 Slope ope ,r 1 E. r Oh ';44: d-'. . - 1.4 ft Escrmnt _ �F ¢ `1 r • 'Nara ' a' 3.6:1 Slope - .. , :.-4r,,...,. -..4. vo.„,,,444: ,.t-tr.i.„..-4..---- -, ‘., 4, ,i.,_, ,... .,,,...4 41, -,.,,,., 4,..,,,.17,..; -'..,,:. '' : •si,-,- iiii ,,,,„ , _ -41?ito, 4011 ...z..371,tF i7 �11=1 cfl , �;'rl`tr �t�a`•` c ct i�t�lit�l V IS tttttttt �;c 1(ltrl 4, •urce: �t c IC, •.e C c e,Ea u xi os 7• �„ , irb.s t ,U u s C ft -111u,,IGN,a c}} c� l 4.c C3'r'nfFn1 r 4. Page 4 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Structure Pair 0 20 40 80 120 160 -8 •Good Feet Notatin Area o Natural Area 0.36 ac lticel r .=le� 111 �`,.;_riiical Erosion �` ' 2 ac Heighnt�aar0e Height ^a� '� �- - •23.000000 32 500000 .�a, »». 22.000000 1.500000 cp,s '" _ `, .21.000000 f ._0300000 *,fir ;� Laka Named large x k v 4 e $$ RiG Rap uT k .Y '� all w f 1 # -__., m,. '" <F Kms.^ .,,,,...0 ft Escrmnt k " •418: 1 Slope �. . , , . .„ ..... .. , . . -__. - .., .... L . . .... , t 1 ft Escrmnt. 1 .9 ft Escrmnt 3 6 1 Slope 2 7 1 Slope was 0 ft Escrmnt Public Lake 1 -7� - 1 ,1 ft Escrmnt _T 4:1 Slope 1268 If !I 2.4: 1 Slope 0.91 ac � � -. 6 acft z �w . w�. -.1 , � � 1 ft Escrmnt 4.4:1 Slope r p t %.*,,t''''''‘!-- -.*- --- '''' - 4''- -''''.'--''''''''''‘,E; 1 l'''','V. ' a .55 .. � ,: 0. t "` � � '_ �� } 0 y 4 - +r e ,�5 • Est�'hcE4t De Lb m,M pn, iia ©C�ecr .1Zi�i�? ciYil t Tia,ill), �itv�a StG�i�orluu • '�/ tijtir e Ssrt 7 715,-):16100 e cl»1v� `1f,1 :li(.1.it Clst1ph1r,t,41ri[i' r '" t` w� �,, i, •lt• S DS,1�.c1;��t.©©..�.',Itl(�ir��;!iN,':lii 1JS tlltf(.01111 0.JnT ro Pageµ5 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Structure Fair •Good _ t, Natural Areo N ee ■ Natural Area �,�° p Critical Erasion. rttical Erosion �a "} : ;� 4- '' lake Point Data lerye Height � " • 9.000000 ' ♦ ^ _2.500000 52.000000 qun, •'_1.500000 ' & •'1.000000 • 04. a` K Y> R t.. 0.500000 I lakes_Name�large RSP FaP an '..41/* sr,'k Ilf".i-4'1_„ , . 00, , '3/4. ' � (18 ft .4),,It Escrmnt4,0 4:1 Slope 0 ! Publ...._ .1 ic Lake 1-8 " 61 4 If 0.36 ec 2 acft 0.8 fl Escrmn+ 2.9:1 Sf'e 0 1.4 ft 1 ft Escrmnt Escrmnt 2.7:1 Slope '>z� ," 10:1 Slope rr .3-' . a s ntlegl, p t ,,,., *,,,,.. ,., ,. , , .. , ,,,.., ... , ....,,„. ,,,.. , ,It, ,, , .,, , 41. 44„ g �I t r 40 s -,:gill _..L71.;. .rme,Mapmylndia©©P- 14p4c t t a a �c t�4cc� t *v;�ij�c�zsT �� 9 Loci _,,_, ,,-4 „.,tslFu�it.� ost.ej 4'N` / v e 1 L) Irl,ll �i ,i, i7�a 21 1Ct�}J IiTZ)4rY1 Gl 1J3crt(lmi-7,1n r}ty Page 6 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes : Srru duce ' Fair t /......\ 0 10 20 40 6080 (G o o d N is • mis Feet r.a��aol Aria I Natural Area c iti<oi Erosion - ritical Erosion lake P<<3 Data large Height ®<3.000000 <2.500000 52.000000 •sl.sa: •51.000000 S<0.500000 lakes_Named large Rip Rap all 0 ft Escrmnt . 40: 1 Slope * 1 ft Escrmnt � �ri 4.4: 1 Slope 0 ft Escrmnt 40: 1 Slope 1 . 2 ft Escrmnt , -f 5.7: 1 Slope r£ Public Lake 2- 1 8 21 I f v : 0.66ac =:• 5 a cft 40.9 ft Escrmnt 13.3: 1 Slope 8.s - .-y. -.Lk,-- ,.,,,S ' N• li 7 ''ti,ip3/4.44- ' .„,t' • *7 :tiP* 4 :4Puir- : sit. ‘4. 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'::*': :4 ' 'rj'S 14'.. r4.rra -rr „04 a l tI 2,, `t c}iin s Ai1171itvlitill l Cs�i 7�t�rl i til]P-C��i le"k ti715, 1rl�l 4t e,St'+ d jlttcl ''- a:�ry.'sit,7fc{1<tktl7be,,ciw.ye,`ii 111-,t.1_c-- oTthlc. 411 / A.. �� 1t lr�}s e`i���ZlD,1�,�1 =lilzl t1�k�i1 L 4 1 1 to j, Page 7 of 45 Item#13 DRAFT ABB Lake Bank Erosion StudyFaofir 45 PBSD Lakes streotvte lir1 0 5 10 20 30 40Feet eT ?ms �"" • Good N0tur N1. - "- a( Area ` ■ Natural Area .....\\ C }'COI 4.rO51 O(1 e ritical Erosio Lak<Point Data Wrge Height 53.000000 ' <2.500000 52.000000 ,m ��pp 51.500000 ®51.000000 .<0.500000 Lak<,_Na<S large Rip Rap tall 4' 1.8 ft Escrmnt 3" 4.4:1 Slope 1 1 Public Lake 2-10 1 ft Escrmnt w. 5:1 Slope 533 If 0.41 ac 3 acft410 0.9 ft Escrmnt 1 ft Escrmnt 1 6.7:1 Slope 6.7:1 Slope 0 0 : Iti ,sl'�'1-471 6eej]c11ra,C1s S'lM Sits Cl15t1", dtr(°bu1:),S,U tr,,MSaijt.s�.:, 4-.bmmine,,iia.),ri 1ni , - _ -�A.1,17 ik)ifirtIilDi.b, ((� ` t .` ci1 li, ti�ltiiSidDi1 i,1C�17b`iRC1s?1syG` and GIS Us 4oiai l rnt Page 8 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes structure .y,.. _ 1 fair 1/11 0 15 30 60 90 120 •Good Feet Mcr°r°l Area Natural Area Critical Erosion Zfl Critical Erosion Lake Pare Data large Height ",., `CS.000000 leeed '- 02.500000 g4. ,x.000000 «,Oggoog Lakes_Named large Rep Rap ' ; Public Lake 2- 12 1625 If 1 .2 ac 8 acft ,, _ . 1 .4 ft a� Escrmnt 4: 1 SI®DDC aS..fisrt. -` Private Lake 2- 13 1 .8 ft1 .1 ft t 1091 If t Escrmnt l Escrmnt 6.7: 1 SIo e 0.85 ac 20: 1 Slope Slope,11 6 acft t 1 rt 'f i' Ar 10': . -,,, t °f,DeLorm-,,1)1,4....p;l+ I cit c open tieetMap contributol;,:.1fldlt1111,1`tt3-.17,..t'ari;11111i; 11.1-,- F ;l,i tcgttalic,lob�,ti,o`.y silrtllakir cd Ll„i�1pt11S5,4'�1`ti' #. ,. a s `,1'i.11 t :i ,1,Usti Aill'o3TUt k;'1,=1flci he Cid-',1.1:e i t.omi rr,tplti Page 9 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes T i SSu clu It . ? ,' . Fair .......\ - 0 10 20 40 60 80 S Good N NI Mil MIIII Feet Na,�,a Ar¢a Natural Area C tical Er asion niical Erosion 0.4 ft Eserrnnt �keomeoawk,ae p ■■is a Height a 2.41SIoe # ' *1114k ' <znaaoo srsaaaao 0.3 ft ' ��o Escrmnt � € LA. ,mai., 2:1 Slope Rip Rap �,z , t-..„''-:'-',ii...,,,,,,--, hii. -111-- , =. -..,,,,,i,,,.**...,',.,-;,-- :' x • ■ i r Pub Lake 2-2+ • ; 888 1G 1.02 ac • • 5 1.2 ft T acft '°f s Escrmnt �` ! • 4:1 Slope ♦ • ! ♦ • • ♦ • • fi 4 #+ + 'ate ,q t 4 ! a 3 'a4. i 4 x • x _ 1,..,,,,,„: - . s 414, ■ 0$ . xlxx • a xx 2.2 ft Escrmnt • xx 5.7:1 Slope • . ■ ♦six4. r01#1 F, q'! ! *04 w e `s74 ti Zti veto :6 TtJIl, )c)�1'rl-Ku'StIA1;)zoiliihtl bra,la,1 11..1:,' (ii t15• f,0r7 i;uttilllyf !•)1'Trissi 7i tiliGh5i,Ciea `"1�i1 1r Cie ,rfpilir,,S, \1-`-t"./ . ,, \i151�DSo LY 4n,USC05/1ei0>217 1 1; 101:ts X7iS Use °r n hili Page 10 of 45 w Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes .....\44 0 25 50 100 150 200 st .‘C., .--' Sky', ''',7:,-1.-- i ' ' tx 0 Good r N - - Feetit 1 100 f NarN.a Airs e t ew• Y a Natural Area A. g' '''41; e,o5 Erosion 1.6 ft Escrmnt �' ", z,, Critical 7, - 2.7:1 Slope ° ake Point�aW larga - N : - Height . . •53 .00000071 ! +a ''t > X2.500000 2.000000 ', 4). ' " _ •<1.500000{ • ... av .51.000000 k 3 ft 5:1 Slope Public Lake 2-3': - 00.,,,„, z Lakes Named large S pc I 21 25 If alma • 2.19 ac 18 acft ', h Aft, Y' .., Olt , a iiiiip1 .2 ft Escrmnt ' -44.'.7 - '''''''''''i''' , <,i.11;',1:',,:--11;::::':_,,..: - . .' 4.4:1 Slope , - • ` ---: titi,,a„,, ''''', y ,. • •' s. �'; • "4'• .0.9 ft Escrmnt ,*r.' "Y 4, .." 5.7:1 Slope M I`LL , ,,,: ,..., , \ t ' 1.' -, . '' :-:-''', '',. / 1::::::41 r ' ',41 '''''''' . 5 p ''-..,*'.1',.;t:11.i. * :It 1 y ,,,„„„,24.6, , ,„.;,.:::,-',,, toi, \ ,..:„..: ,,,,,, t,„;,4.4:.,1; -,,,Its, : t: 7.,-'0. «,,.. ' ; t-',,„,..„„=:- . . 4iiir .., ,Lt., i. Ot ir' ' - 1 't ' ..-...." ''-.. -,--, :,--' ..,,- 4 '-,,--, -.,.,,.. i 4, I *, ,. ,,-„ . lilt z-'.- .4 '= 0.5 ft Escrmnt 1„....4i.,.• l Slope �� ti"�� . itc,.ii.6 litL...0 7� , ap c *tribu ••rs,an. . StG°•" •m lTiy, �tl cro ;7i,,it1t211ttS ;'Geo �' =1 starGe�cT��i11 , 4� s-/ 4 �� s Ailbtrs i0' t1�D'l,t15C-k.t... c.eRID, 1,,llry2,the GIS 115 C. 10.61 4; Page 11 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes r*`. irrueroe• e • Fair 111 0 20 40 80 1 20 160 S G o o d II Feer ecceraJ a t1 .6 ft Natural Area {"* C i1 I Erosil Escrmnt 1 .6ft .Iriiical Erasing - s�� $ 7. lae-M'e''''r'e , ;� 31 :1 Slope Height 2.5:1 530�� • :, ,g. 4 1, • 52.500000 a�000 ¢`t :<1.000000 * . �� lakes NamM large ,,,',i a RiP Rap wall 2.2 ft Escrmnt 5:1 Slope k 4ftEscrmntes e .7:1 Slopee: 2.2 ft Escrmnt 4.4:1 Slope Public Lake 2-4� tee 19181f 1 .85 ac � e 15 acft J '0 ". 2.1 ft '` e.Olk Escrmnt 4:1 Slope lir . ..4 1 ft i� % 1 .3 Escrmntte; ,,,,, 5:1 slope ' ttl**4. 'r Agra - p e 1 .3 ft Escrmnt ' ' *701 4.4:1 Slope , '` *, �Y 1�. rmn T 1 .9 ft Esc t 1 .;rt -,<:: ..\\'"gii h 3.1 :1 Slope M Escrmnt 5:1 Slope t 1 1 .3 ft Escrmnt "" • 5.7:1 Slope 1 <c . Lo, �sri, ERE De � apm"'Fcj ,� n r ��1 � ei)r�u t i�r�`)t14 I �iG>G,,l e�riii�>flT �.S0I1? s�Ti DIlfiillc�la5 ci caw ���lili C, �i�i17r`i45,c,�l V • — '�.: .. �„. � I�►i���„7y�LJe�a• <<��, e'.Y�7tr�h,ICiI�I,�il£fi'rT�C�h L1S r"4�inlirL r g Page 12 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD......,,....\',...--,-';' _ Fair 0 30 60 120 180 240 : SGoo d -11 N Feet `'" Noty rat A.reo ,. ■ Natural Area s ` �`,, 7,2-vi-� `;x Critical Era:ion ile , .. �. ��' . . ,, . � ritical Erosion y;, ��',�p� lake Palnt Oath large Height . ` •'3.000000 3 '2.500000 ��':.: � 52.000000 Y •'1.500000 .._ •,1.000000 ' -4 1 2 ft Escrmnt 1.8 ft • o.s'000 iiii ,. Escrmnt lak'.Named large �' 5.71 Slope 4:1 Sloe p ill :-.4„ 4**-• - '''' a . . t.''' 1.9 ft ? Escrmnt , . ' 5:1 Slope 1.8 ft , Escrmnt 1.7 ft Escrmnt * ` 4.4:1 Slope 5.7:1 Slope 4dis, .� 1-114. TAX [ ,..7,--';'-'1'4: � •. � 6 * Escrmnt ,,,,+„.„4.1,041, ,,, ,4,.. „ 4.41: „.., .r 7.;r' 4P: ',, 4a � a2:1 Slope rr "" 7.7'-ft Escrmnt WO r 3.3:1 Slope / 2 ft Escrmnt to,ks, 2 7 1 Slope ' Public Lake :._,E,5,11,1:'-';'-t°o,t;?'''''''''ll '''''''' `" 1.9 ft 2671 If " �, Escrmnt 2.99 ac "5:1 Slope 25acfta4. s2. ft A i .� ,: ! ,Escrmnti... ... 5 1Slope''t �7 � 1.8ftscrmrr'� s ' p 4.4:1 Slope , ,. !�. �I rK 3,N.; -,-..i..„-:,.....,:-.-:7,- + A �b 'i .WX„I- �.. .ski. 1 §e • sem: x` - FSn LI 2` 1 [;.�ii�= `a11i���Yltlif�-1 C)e)i�:' tr#-::,-M41)' (.43,4---.'''''',F.2- e 1x121 e C„4.-.,‘,...... -4,00,,. orTili ttlflly/, 1i)Lir „��r1 7I 1 1 10 1 L�. v 14"-1 v1 Ali E� ee e© l 4 ti .�... , /{re S--.. �;�LJ�L./�,l/>C7��/.`,�C'�i7C7 B� cl�u`t C...}. .e t't 1Fyri Page 13 of 45 ` Item#13 DRAFT ABB Lake Bank Erosion Studystructuofre 45 PBSD Lakes * Fair 111 0 25 50 100 150 200 Good 0 F t Neturei Areo r Natural Area ; Cri t.i.eel E onion `e ; } tt ritical Erosion lake RoiM Data hrge r 4 r. '' �44 ,�y+ Height Y 53.000000 3 52.500000 w � '" iii .10 52.000000 _ n ; .5.00000 y S^ •4 _.000000 15 � a _ Lakss_Named ler9e it a/ .,110'.... RIP Rap #err aT ,v / .. !' : s rf 1.1 ft Escrmnt 5.7:1 Slope + " ` 1 ft Escrmnt ` " X5.7:1 Slope ,�,�, � �11 Public Lake 2-6 1. 2345 If 1.6 ft 3.4 ac Escrmnt < 31 acft �l• �"�`� �,.� ,� � J 1 0:1 Slab,( • „ 2'f ' $ : Escrmnt 8:1 Slope 1.8 ft 4 Escrmnt 5:1 Slope • Yui i. .+� P✓ -''''-';'''''':;-- 0.6 ft _, D fes. 1,,i --,...P. ' ' ''' ''.." 'k:' ''-..:' ; .* t4 '4: 4 4..x:1�,�pe �..:�� ,� A �� PublicLake27` r 4362 If ` { : ~SPI l tcw,,rtiIOr i= p yl li C? ()7e,11-`U'efi1,1 ip Self 11 b it i..1n,1 ,h ()l`L, -1'eommunit.;, S�?Lliie':,::L1-141/A.1-:-'11°b111-j-: .s t s C r,cG�,J C7 .a,� 4? ;�11�S-1t t�s`t�": 35 acft iibu5 DS L) �/C L)s�,s,t. ��, 11 lci`J,�rtzl�r ISL 41a i Page 14 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes t -- . Public Lake 2-6 1.8 ft 4,ru<fura �.. 2345 0E t a i r 0 37.5 75 150 225 300 4 ac QEscrmnt Good ac 5:1 Slope g N M M Feet Natural Area Natural Area - .. eAC fi<aS Erosion 0.6 ft Escrmnts. c n Critical Erosion �r,Ptt-"*i ,.s X4.4:1 Slope ';: • ak PmMoaa rye ;� likj Height p _ ys' ' •X3.000000 Asn- tit, 4 0 2S00oo0 S4401.3 ft -.-t tii. 4 T llilt Escrmnt •<_rsoaooa 1.9 ft „4 1 slope,L r sosoaaoo = 2.3 ftkiii,' A Escrmnt _ s ' £ lakes NamMla e *Escrmnt 4 1 Slope P„Pa, 4:} Slope 14, 44 ,'F an «. a € e 1 ft Escrmnt , s r 2 ft Escrmnt "t=e6.7:1 Slope , . 5:1 Slope - ''. 1111 .4.711) 4. ..,ter " 1.2 ft Escrmnt 5.7:1 Slope -tettttr �Y r� ,. s 5!_.p=.,-_,L,.;!,-4---.4-.: 10,-5 t �r ` ir ;; „-- t .`-2: q�..xx.--.�.,«..—.ice _ " u#4'5 ' 0 ft Escrmnt s' 5:1 Slope . tt - . 1.5 ft Escrmnt 5.7:1 Slap(' 2 ft Escrmnt public Lake 2-7 5:1 Slope 4362 If r 4.36 ac 35 acft . s "7-1!:::-..:4$ile.' 11::''',E'FLI,':L: '`:=-,:. ' - ' '-'4 44'11';:11 ::"' i ' '''''' . 1.5 ft Escrmnt 1... _i_.......44,:::: ,, :7'.', r 5.7:1 Slope 4 fr :*, ,-- ' , , , , & " � 1 ft Escrmnt r a 15.7:1 Slope • ' t. t r 1 ft Escrmnt •jA 6.7:1 Slope" air k 1.2 ft-Esc-at nt i 2. + « - 6.7:1 Slope . 1.5 ft Escrmnt 5.7:1 Slope r, t a 2 ft Escrmnt` `.. 5:1 Slope , .:, , _, -i-,'k:4,-1:::,,,,...- 11**40:ALK ' 4. ; N. All i ap A,• ,t A.,Zs�oper-`i'.tho e . to!,,or rs an a 1 Cry t�t'1 cn Jn ' tllfic"n' ii 1,D1 1 ]�Cr)07 dal 1,41 li ci?c�ijil7{11[a,CNsti' L.,:-.",•,,=.„,,,,,,,,,.., , .::, i5t�;�5,L) ,115� �b c° P c�!1,inti ti •c;l�tl? c otr, tnfi Page 15 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes {; Sfru.9ure ` .. � 8 Fair 5 0 15 30 60 90 20 gyp, •Good Feet N.furar Aren tz, , I: 000 v.v��. �a ■ Natorat Area r m G ., Erosion Critical Erosion �� 1 .8 ft Esc ao�ncblarye 1. g� Helght r p P zs��a a , a��o +r :� d.° : k •51.500000 51.000000 y,:v � ... ° e •50.500000 1 € • 1 ft `'4.'. La�kez_�Named large f RI Ra x..., all Esc Public Lake 2-8 1354 If 5: 1 Slope :. 1 .06 ac 7 acft c ,„ ,41114 ‘ ..„.„.,4t,tr.,,,, 2.7 ft Escrmnt \ 3. 1 : lSloPe x 404,,,,pc. .� 2.4 ft � __ Escrmnt � 5: 1 Slope .a n iZOP a 0.6 ft # Escrmnt � � 4.4:1 S'lape k tkittli3O 8 ''-' , : Asn a ® t , p � rrci CrStreetMap contributors,and the GIS user co unity; Source:Esr,a �{fill�th� �i'� v' lt�li 4 ��7 l�i$"44� � S/* b .. All bus DS, �'�11,�)SE j,1't7�—'11.-041(4 17,1C,�1, t12�e -1!'FJ,� Co r t tatty. Page 16 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Fair 0 15 30III 60 90 120 X11 $ a,. � •Goo d - - Feet F ,� , in Nal Are. 'v e ■ Natural Area t , a Cri' s Es gsigr} .. - _ rititai Erosion .......4,-x lake Point Data large � , Height ti' fit, •<_a.a00000 •„ '''',,...15 szsoa000 ..,...':'.4.iss sz.000wa =e^ -s •<isoawo •st.aoaaaD ,t :} •Lakes�Nmed large a 9 rtiP Rap fribb - a 2.3 ft —` r Escrmnt Public Lake 2-9' 4: 1 Slope 1659 If 1 .31 ac 9 a cft 2 ft Escrmntil 2.4 ft Escrmnt k. 3.3: 1 Slope 411 5: 1 Slope 2.9 ft Escrmnt 4: 1 Slope 2 ft Escrmnt ' 4 r 5: 1 Slope t � • ';kms ,,,,i‘lite. � '- .aka= � : .i } *r'-HER HER C' 6rme,'.. apmylndi.;: �7�rU�igy�illp c,0111-1.1bt6''''in1-1'.1te 15tz rt m tilt t -----'e"`. 7illTh-- ,, c, o'^re, 1ri1 Fcil--,"jr ph s,(NE `217 l�,i l ant ute t)5 i c Gln f�tfttl'v Page 17 of 45�� Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes cwtg - 4 '''' A a = 0 15 30 60 90 120 •Goo d Al F__1 y, 4 t se Natural Areo �V E Natural Area C iti<al E•asion °hrt ,.00-,,,-E1 .5 ft l .5 ft r r,ti�gl Erosion ,. F lak.P t Data Wrge �� Escrmnt scrmnt , ' Height ,,,,,,).F.,--,,,q-,,--- ,.§ . ` � �..:" •53.000000 <1.500000 ' f .2500000 4:1 Slope 4:• 1 Slope m •,. , .,.a�oao _ ._ ,.„ ,..... . ... •X0.500000 lakes Named large ,... ' ,. RIP Rap I — all ,_,N, . ,,,. . . ,. . , ,, ,, ,,. ,„ \ 0.7 Escrmnt *, 1 .4:ft1 Slope ' - /- ` Ir I Ir v , `� �0.7 ft Escrmnt - ' - ': ./..-:.,,:-.;.4,2-„, �� 1 .5:1 Slope .. , _° < - ks$ ` M A , ` .m ;t \ 1PukLake3-i ' 0.7 ft 4--, - )72:: \ - 'li' 20771f Escrmnt - ` 0.7 ft Escrmnt 2.04 ac 4:1 Slope h;:,,,,,,--,..„*„,,,,,,,,,, do- ; £�. 1 .5.1 Slope 16 aeft ' ... 0.7 ft f x a Escrmnt 2:1 Slope , t._, -7, lip: _ .. �a . i ,,,_,, ,,, - -„,.. ,N '. ; . s ::::.;;',W;.:, ,t... 0 1 ..,,, ,,.., . . ,:. , t „.,,,to.,.... .7.,, , . r x0.7 ft ' --',.0' '''''''''....-----.: '-''''' Escrmnt d , ,, , , ,, .) . 0. ,�.\ �`, .. ,.( r' ..' 4.1 Slope 4, 1 .3 ft ,fir...r.,,ti,,,14,.. Escrmnt t.. , *,,,, - •-:•;,‘ : t., \‘ .„.„.-.-,..- t ik :,, ,,, .. , .; 4:1 ca Slope 0 5 ' ,"'" *"'4-lit..-i-i:;',` l'it.:;, ',.._-.'''' , % ,,,, I 'f.,0:111nr:r. ' `4•1! '-'.-'-'"' •';"*-' ' 7 • ESrt,HE`` b- o 4,1c pfli'1ilihZ,7 Op ''�t fiii1 ip toil lbtEoi5,:lilt)4";-GIs-tG..i P.Oitlrrlt j ioi. lFC VlliillC��1}1(J�c}^rti irli{1i C'ii�_TyL}liC,-fi''::,''': S, Aigia '�. � "` ,1t7�i���,1)��G1,1J<<���� C��21�,lctr'�, �r�l art CO f „Cc}�rl� Page 18 of 45 • Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Myr. .f ., 7 't st:� �E Fa' 0 37.5 75.....\ 150 225 300 I `I' •Good Natural Arca N m Feer Iffil Natural AreaC --- Critical Erosion N.,. - riti ca I Erosion 4111 . lir , A'; take Poin[Da[a Wr9e Height 0 4.: �3. 5z.a00000 5 «1.aooaoo<osoa000,Atiill , _,.. - Rip Rap ' '- 4:* '' '''Al) k ' # Prcivate Lake 3-4 681 If , gi"1* 0.65 ac lo :........1,.. 0* ',� ` 5 aeft , �. k 1,2 ft Escrmnt 0.',,i,14,004:, lroo,,,,,,t,:::'4:::::)::: k., 1 Slop, Escrmnt , 4:1 Slope /4.. . } _" ._ •..L •. ,lir' rsg�.. _. ,II ' ' 4: i°,1: 1,-A--i.. . -„: : -;liffti'' is* ' 14\ I y •1,2 ft Escrmnt .3.6:1 S!, ,+ `, i 1.5 ft a Eurmnt 1.5 ft • a `' 4:1 Slope,, Escrmnt j' kirtirst, 3.3:1 Slope b ft Escrmnt xfil y ~' ;.0 11-11'1'1* >or 2 ft Escrmnt > #. i'6:1 Stopc 0 ft Escrmnt c' -v- 4.4:1 Slo e 1.6 ft r 1.6 ft Escrmnt M. P Public Lake 3-1 Escrmnt 4.4:1 Slope _. 2645 if 2.3 ft Escrmnt >, "'4:1 Slope 2.64 ac 3.61 Slope 5 .T x 21 acft 1.6 ft Escrmnt 1.6 ft '� 2.2 ft m t 4.4:1 Slope Escrmnt Esc mnt *, 4,:.-;- 41 Slope r ,' 4': 5:1 Slope ter" - `- i. •F Py w,'`*a.• di A. Iv is .' 1.3 ft " e Escrmnt �,f 4:1 Slope 4 tT 1375. � , r If—. Public Lake 3 5- tet, 44 0 �: '' 111' . It '''. ' 11375 If *^ a „, , - , .„,„ 10 srit . , e :.4„ = . 4 1.66 ac 114 acft T p* *r 5 f 4.z T - 4- *it. '''*. .. ' '''', l't , it '''' k - , .i,... ,ii..1,,,v -,,,e- 4 - S l LI `1�; :? `-�1 v r1r111 C�ft l�slk lcl�t ei �j, l It l�CSS ttS`i:i e rn tfil ,YR Sett „ 5( f i}i1Ca0�'it 7 e •s s lit C,'t3 � ii- S.' °4 mall ,C 4 tr�n, r�c, 1 c Z11 lc,�l, 111z�c�l s, tJ_ r r' ,lit , Page 19 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes �ra�Lar. , ..< �� :-. ', � Fair 0 15 30 60 90 1 20r G o o d F 1 _ :- N to ral Area a Natural Area _ ..,:f.�- C t <al Erosion 'k. ritical Erosion s omr oaraw i r t°* #-. 400.. ., .1. Height 'fid �"�'°,:.,'-`,1 �y, ,.. � • 3 000000 F. ' ♦`g{{ ... _.500000 a��k „.. X2.000000 ) �_o.sooaao 1. # --3� Tp j'�. 1 lakes Named large �i d � p" RPRaP n jilt, a IT Ali • rtm���_ 1 .8 ft Escrmnt -.. ,..,*''''',:::,,.r,,,, .g'.--'::::14,2:,', ,,;;47 S.,. 10: 1 Slope 0 Public Lake 3-5� % 1375 If 1 .66 ac F 14acft ,t ft ' 0.95 ft - 4.4.,..„.„.....„..,:. ..,.. . . . „ ..,...„..,.....„. ___ _ . . .,,,,,.„... .:. „ ..4, ' V'.'I. 4 Escrmnt 4: 1 Slope . ir, e . ,, 1 Slop 1 .35 ft Escrmnt 3.5: e • i �9.-ft . :Ermrt �. ,_, t 1 �J;a Slopes 3 � t r 1 ( �l c ir'a i,)l�i;vl lith,Gr7 Op ilii e'i�i)=17 r i, lhtfi.�r, nd e t',`U�7 ei ii irlllilr i, �tji v.` rt t lc�i`l�' c* 7.s�lwvc�`i uliili y'�ai t e I 41) 1i7 l�i t) i 1,l).c; \vitixlp kiN1:litil.l`t' �t1; c t"`te.171ri i'ky Page 20 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes ,,0 c, e, fair J0 5 10 20 30 40 Goad Feet .11 N°1 '°i n,e° Natural Are a '-':-:i''ClUblat e°I Eeosion ritical Erosion ( k lake Poinf Data large �� " fY °y •Height 6 ss.aaa000 szsaaoaa I _ •„.00a000 «saa000 2.1 ft Escrmnt ®«.000000 t, 13.3:1 $lope easaa000 3-j 'r Lakes_Named large € ere flap all a. 3.5 ft Escrmnt , Slope i 3.3:1 —t,:','''' ii 6.1 ft Escrmnt 8:1 SlobW. r :Z a 1.6 ft Escrrnnt Public Lake 3-6 r., i, 896 If 1.07 ac 0 9 acft " � • • • • s,, a y 4� r +J 4-�' w ads ` e "� 1.5ft Escrmnt 1.5 f t 00 �.F Escrmnt 10:1 Slope 20:1 Slop r aA 3 1,`l5Z,4'toiiro dill�rTvlilslll,Cts C7col I' �l17 'c)11L.i)tEors,lili tl ci t1 '� ili iitt11 ''-it'''''''''' f „E i 1c�1 liC)c� 0.t3eo1' _tilriila"i i Ct'�if ti}111 5,C�1 ' t' 4s .\-..-.-,LFP' u i 1 lJS i ),'\e clftR11,1C-fN,alilZ1 alis Cil l) 1(i rnili dill Page 21 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes structure • Fair III 0 10 20 40 60 80 S Good Feet Nctaltut Area S Natural Area Briticel Erosion �tritical Erosion lake Point Dab large Height •53.000000 t 52.500000 02.000000 • 01.500000 • 01.000000 •00.500000 . Lakes_Named large Rip Rap all fc ./7 . A) ‘, ..,,, ‘, Public Lake 3-7 Nt 1066 If 1.22 ac 10 acft 1.6 ft Escrmnt K. il Alk ?:l Slope 5 ft Escrmnt 10:1 Slope �a j_T, 1.1 ft Escn,int '1' 5.7:1 Slope • ^M1-.-.1 ,� n"` er -� C W a�.,'" ."C'c c.:c l . CN Sail,115 r_list or ,r ' ,iilp ylitzha,g C);1-'.i1-`1r�'til:l7 r,oiiiil)t�c?l7,1i1-1 kit-,�i1_.11' t��)tlti ltlPl>y�, ....-. -c A tj5c, ,, ,i , t , ll til t `?1i]Tilly, ,.` /\i;51�s i2 t)5�/1,tJ €, a1:r0 i 1D,1�trEI,aitz] 11e�,1�Us (ilio tT 1ftt Page 22 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes 44 r '� ',� r D, � Str•ct•ca . .; Fair 0 75 150 300 450 600 �" a1 w •Goo d Feer _- �. , N•t�.•i A,.. 4" x / a I u r a I Area R c Y ifi<al Erosion •� n „ Sr .- critical Erosion T Lak Polnrt DaG large '� � Helght x3.000000 � � � A * t �x2.500000 a { r 2.000000 .. _ - ,, , , A - 1.500000 �k ,µur • ,_1.000000 " z�'' �r a ' v •,0.500000 'y k -qtr - Y.. Lekes_Named large , .._ 4 IW lir . ca �`f12 1:1.-.'..'.44(4.1 RIP Rap Y p <. < =t , 4101 .1i 4 „sir,. -4-4 .*No ail , _ r } .741, _,,,.........rlsti,. .,:ie:,,,i‘ 4% ,,,,,,.:47,4, : 11 . , ,„ ... ‘' -*', ''':.,: , 74. .. 314t, ' .yn 8 I ,--4, „.., ra J`� � '..."'l 1Ra#4 ,,,.::- "' ., .6. ---: -,..„;`,4 „To 0 r hL. t 991.1.1 ,,V ' ,--'tE,-, '' S m . a t. € .I ,. 4.44r5V,,...,,, '444:jef ' . . . ' mai,..*'. ' ...di., ' fj, 44. '4 '1 i , I ' :- .. . .'"" ,_,,,,,,,i- 6, . ,,,, „ A r.*r 4314.„ :74 icipt .,,,i.iii.,,,, , ,.i , 1 0 Art .,...:,,,,:t /10. ir + s,r 74P,1,'- Ni*' ,, 3.4' 1 ,,,,,_,f,yefi ' a' n 'ate`$' wR 1291 If • . RF , ..r 14 yt ok lvnry i � ag rs1! i / as% eu lifo 4 45 w .. , . :,,,,, f'fr--i, * ' • , ,. .. . . . t„ . , ., . . ,.. . . : „„,„, , 4.-,,..„i-,, ,--. -..-,..- _,,, .-._ 4 .11/4.: ._ .... �" . , ..,..., ....• • ..., ..,,,,,,,,,:',, ...,--.- ,,. V W. '.S ti y�y �„,. , ,..,. y ,,,,,i.,....„...:.,---. .'ir.- '''-,—",...'‘44- `.;e 4 v ! n- :. `gip. ¢ ” ,) < r 4 _,4_,,, t75 std ;i rpm, ,: 6.p- $ -.uET=l7�c,, tn li.crsran•"`t=Aid23o �7Tii�itllTi�t Ti J,�tS' cOe ® r4a�tt,a .ttzc[lt l fir; x 11 G�li lG LZ t� l�1 -a . `.L� �17�J 1flc�ule�f � 1a L f Page 23 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study o e45 PBSD Lakes P ' Lake 4-17 •�� sr,ur,�re 24 If rr * Fair 05 0 35 70 140 210 280 Public L •Good { -f 0.9 ft 187 wara.al eta 9 c Feet s ' w` Escrmnt ■ Natural Area r f�: ' 2.42 F, 5:1 Slope 21, •.,Cri+:'<al E.osion 1 n00 4 Critical Erosion S Lave po'nf Data large °- • 'f ,`,tls. Height .s3.000000 ,T/4'a4. �e,.t II"ill 02.500000 x1.500000 ` , l •<1.aoaaa0 4 •S0.500000 .t • L kes_No*d large tiiit. . , # Rip Rap ... . , . „ . ..,....„. 4a1 £t # 1.9 ft "4' x r ,, ,. Escrmnt j "° '1-1.,.!'':!,:4,,,:=::,,.47,- 2.6 ft = 4:1 Slope < 4�,:..„-,,-,,,,4,,,','.,- -,,-,4 - , .Escrmnt �' , { �, 4:1 slop,,,, . '" ,: illi , . ;rte ,g ,, .),,,,,, A 1 > 1.8 ft 1.7 ft Escrmnt , 6.7:1 Slope ` Escrmnt • 1 Slope . , . *i.,-.--'"::-1''-,41,4:-",-Ill.... " ' lio' ' s . ,1-' r -, e, i 04 a : 1140 ` ilt r�, ... t, 0 ft Escrmnt °," 3.1.1 Slop 0 Slope ffi � 0444 �" itelmiimi �, � -� r 1.5 ft Escrmnt 1.� -",74.--''' u,..=��� ;4 4:1 Slope , � � ,,,'-'4-,,•-,:.,1m.,-' 10. .'Escrmnt Xt f 8 1 Slope 0.8 ft Escrmnt : I 'm 6.7:1 SI()pc, w , � t 1.7 ft Escrmnt • , �r a 2.4 ft 5.7:1 Slope / 2 ft Escrmnt , 4 1 k. Escrmnt Sloper..:-.,,Z%,,....,,..,At 1, € 4:1 Slope ( :_ ,, ,Publ!cc Lake 4_1 11\ a• } ,*„ 27Q6 if "°' x .A. ---- ...,-,..,------ , ..99 ac S , '...'S'ri ;IsZ tit7rl:L.">',�i m?r,;(":,.„t7 i� �6 C7c?�iiii11`U�t l7 S?1 a1 i Ilia' �t)S i�e`P i t nTtiv _0u1-;:F,'-:,, i ,11�1T ll�t}O�lc' C'�e'�.y� `l`l\ ... a li<i cii�tp lhs C `/'. L. :1 Zlit�C'. C" �,1,l)ti�t ;1�idc�ZID,14.,?,'I .litz{'�7:,tij.{Ja Lc�llul"ttli Page 24 of 45 Item#13 DRAFT ABB Lake Bank Erosion StudFay ofir 45 PBSD Lakes Structure 0 25 50 100 150 200 Good Natural Area Feet IN Natural Area , � '- Critical Erosion ritical Erosion : }, ., ePoiM Data kq lak r e `'- - Height" & •c3.000000 �, - xd - j kx� c2.500000 1.5 f t E;u nutt z.amaan •c1.500000 _.,4 4.1 Slope •«.Dga000 1.3 f t •c_0.500000 ` ^-, Lakez_Named large . ':-). , Escrmnt "".P al ° - 8:1 Slope 0.8 ft Escrmnt �� � 1.7 ft Escrmnt 6.7:1 Slope 2.4 ft 5.7:1 Slope �// 2 ft Escrmnt 4 1 Slope J nt 1.8 ft Escrmnt 4:1E Slope e , 4.4:1 Slope p /\ ttiiiiN e ...,.:- ' '. '!:4'4:\\\ ' ,,,•er `:, 2 1 ft 8 - Escrmnt , • 4.4:1Slope r #x P t. 4 r1L trri ,„ 1.8 ft „.,.i' .tert Escrmnt ., -f- i 0 41 SlopeaR � ' ,. . . ,p � ✓ � ;_ : � .tip „ �� � g . d$: 4. -...--,..- 4:. _,ig.tr, . 1.7 ft °; : , ,,,,,::::11:,..."...: . Escrmnt 8:1 Slope . ::i, t 1.5 ft Escrmnt ,5.7:1 Slope *ilt.A. =4r . l'-'. -- -...i. *--.-,. , ,".41T-- '44- '-,. L-1; ,,:::;P.....,,,,4::'.,-.'.,:''',4i.V.L4 yy • ".. 3 Olt f t SS" --. rid' '. .y. -h.^ r::3 6. Escrmnt ti`:-..:.,..:. ,,,‘i.! f �, • �, 5:1 Slope a„ u Y '3 .r,A;” :::4017 -.;-1"k".' ,i t' ry '` . Mt I. $ .. P . 1 y^ r It "j',^ 7�r h1 3;c l t . yt r et m deem ndia G a treztMa cont q. c 7 ,,A tiY-C,1- tta-1 1Oil,iii�t rli >tt c �,7i,1 1 c, „i\&Ire1- G , rll�l;i17 ct��� �'ti, ; .. \f7ct{. 11 t\;11`ci J/1c�clCr2tl iCiN,ll�lm c l)a�i c�i iltfr114� Page 25 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Fair �e` 0 15 30 60 60 90 120 •Good 3, Netu ral Ar<o N Feet Natural Area CntTcal ErosioP z .44 a "� - "'1*;ilCritical Erosion s3,x,.� t lake Paint Data large # ,r. � A'� 3� �, Height .. �<3.gaa000 �E..,k �„ ,,; � �szsaoogo @ fi �' z 2.000000 . //� � 3} � v. � 1.500000 . ,� 1 •2 f t , ,. � -t.aooaao s- -'''''' tc:40.4,1kii, -y� Lakes Named large Escrmnt RIp RaP sn' � r, i iw 4: 1Slope 1. dee .� 444 a4'4 4f4P" 1 .3ft .. , Escrmnt 3 �., 5: 1 Slope x ,x � ' • 1 .6 ft Escrnint 6.2:1 Slope a Public Lake 4-2` 1 195 If '4':',.- 1 .56 ac _ ..V, ft a,, 14 ac � 1 .75 ft mnt$ Escr 1 . 14 ft 4: 1 Slope, `" Escrmnt 5: 1 Slope \t‘ t ' ' '' -- ,. f4N- t E ,- 1 .4 ft Escrmnt OrU ��0 ' ',0��!� - 5.7: 1 Slope . ° ;x '4 tlpE,- r''';1-',..1,'"!,,`':;-„:1, a F ®1''''1,.,41',,,.=',..';,x:.:-'1< ,r� t. A:, , ; is: a. . mt r �:c ) t Cl c C_- , Vi ,-:« -,-_,,i). C� �aY� "1� ..n a` _I,,,• k ,,,,_:,..,a TPi s)l ,1 111C} C2tNJ ih fi} -'4 . aG 11 nit '�S1,L}}C,� A �3c 4�fc to S:1 -,„..4.4k 0Afi4tS ,tJ3Qens ace :":11t.:414,1-411-::',-.,,,,1".111:-- . . ...�tilL � I �lc ., t � _'Page 26 of 45y ,tsr�, : m gri lt.I 41 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes s:, .,., "" '.. '•'-' " ,� .' f a i r 0 25 50 100 150 200 Good Feet 1.78 ft Naru,ui w,�a .111 2 ft Eserrnnt agar n�ea -� Escrmnt t � �� o� 2 t 6.2:1 Slope °�. 7.5:1 Sbopc eke oar�w,`aI Erosion ".,.. , •. ....- 41:78- Height H. ; , ,,. .. .: '4.."1:: • ,.• ....."-'.•?: 13.000000 f 4.11' @ 3500000 f , 1.7 ft Escrmnt' «5oa�o 1v.00aooa �� 4.8:1 Slope losoa�o gi"��," +�' Ya_ LnkPs_Named large RIC Rap .. � all ove ST g' *fix s « ... 4 . 1J6ft '` Escrmnt "cat` 6.5:1 Slope1.`1 #.. .,,,,,,..,„F„r,7'14t:.,,,,,f *'. Public Lake 4-3 . : p 2441 If " 2.86 ac w 2.15ft , I 24 acft v Escrmnt 7.1:1 Slope -" '14,16-1,:r:- ,..,1.95 ft fii\k ......„,„_,7•-„ Escrmnt 5.7:1 Slope 2.4 ft Escrmnt 1 r -- • 2.9:1 Slope 1.4 ft Escrmnt lilltit*,.,, 5:1 Slope Z , ,,,__, ,2 ,,:.,,,..,,,,,.,1 ' *,,tt, ,:.,I:'' ,, 4.. _ ``, 1.6 ft Escrmnt ��. li....', SJ:1 Slope �< 1.5 ft Escrmnt Public Lake 4-1'' 7.1:1 Slope - �° � .'- 5689 If 1 7.49 ac . 4 66 acft 1.9 ft Escrm0,.. ', , ,."::: nt _ 5.7:1 Slope "- . w, Esc rrt t II ft r n , �,. ,4: 'Slope , 1.93 ft 1.45 ft " ' Escrmnt Escrmnt 4.4:1 Slope 11.8:1 Slope . 5 e t I nom" c � " ,' # ,. ' tts.�` .1 , �li'y�riihl �)Open,4_ l'''-' ' 4,%*i.;01'141taf. ,' _-.,_,„,,,,\�tl7 cc}e�� 7tfy7j mnd uh til t�3«Se nittai 5?11i�cv sit,:b„,,,954.,•-,„I IE���l� ( cs , 1•r y 1lccj 1711 .„,,,c761,-,,,,, # 111 t i a �2?i i mi diel« t tlsy(7:01. rj trrit'w�, Page 27 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Srru ctute v 1.43 ft Fair ill 0 5 10 20 30 40 0 Escrmnt •Good Feet 4.3:1 Slop ■wotu,or �,eo r Natural Area ' 4 Coifi<al Erozion. • rprltlCa t Erosion Lake Paint Data large 'a Height 000000 fi ,_2,500000 ,_2.000000 *000, a • r°^� sso0aoo ®sL.0o0aao �' I,_0.000000 , lakes_Namea large Rvnv ,. an . fix: ry • < q 1.76 t Escrmn , 6.2,1 Slop e1.76 ft Escrmnt oselitokiiivivi,, L. Public Lake 4-4 856 If 0.61 ac 4 acft x. e 4 ... 1.46 ft -- �,_,- Escrmnt 8:1 Slope r 1.95 ft Escrmnt ' 4.4:1 Slope >, t „,.. ' -.4t.' „f , 0 .; ✓. • ” Ott, L^l7riiu��i�17rn 1nth ,6?C rit`i5cf`��i�l i�rl 5tfs�lra,ll�l"`rl'C't1`ttiw7 i�ri i dill oui „Esii,['l(1Ti:11C;1ob'(li t v..,44141 7cis lis.car,CN S/ 1F7 tC ,t) P,;l,11 i3 ,1�7t�4Z1�, Icir',lflel«lam cis L13s 4ilr�inllfrlliti/ Page 28 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes 'ti ��� srro ctu re � r 1 .2 ft EscFair 0 15 30 60 90 120 G o o d f. N Peet 20. -1 Sio . M NNeraturaa l Area C.iti<a! Erosion ' ritiCal Erosion take P<<t0 thWg< ' Height { .53.000000 ,.500000 1 .8 ft ,.a..o rsaa000 .5r.aoa�0 .50s : Escrmnt La tip Fbp ,.Rt 5: 1 Slope 1 .25 ft m .,. Escrmnt X3.6: 1 Slope p . ffi .95 ft . �� ,.,. : ,,''' Escrmnt t. �. . 4.2: 1 Slope 2. 1 ft Escrmnt Public Lake 4-5 ' , 1291 If 4.7: 1 Slope . 1 .9 ft 2.04 ac ..A .:, r-- • Escrmnt 19 acft 5: 1 Slope .. '1.".'otittit 'r f . Y " 12 ft Escrmnt .,. -,,,,f- . ,,_,, ,.,,,...,,.„,„.,,. 7: 1 Slope 1ft .5 Escrmnt S d 4 6.7: 1 .. SIope fi ,. .. ,, ,--- ,.. f'' a . .. ,.., , �, a ' x r p 4 yt 'r U?��17t"n dsj.7r�V1t7.21 ,`¢ 6c; 'u,� 1 .t. r 1:°rf'-=1ikl,'tvit1-'St5�'t o i.iTtiillit, ,�tjr 5�71,i11{ IGlob ,1t �y ''21'"The ilS ilil;lilk,,,,,els f 3 a (ati tG 7 1)ti 1,trr 1 G,i� anc �i� ctls U 4t1 a t Page 29 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes .. -rya € Fair 111 0 10 20 40 60 80 lit •Good }� Natu+oi Aeea Feet 'r � Noturol Area as .w. C tical F+osia. ritico) Erasion max., lHeight + 0'i43�11R ...055D00000e0000d000 0000 00 a '2.500000 . - X2.000000ii u ' .^§ t iaM , $ #_"- yRLapkaRiepNam0W . .. , . ergd el arge �4 4. .4 1 ft Escrmnt -- .z 1 .6 ft Escrmnt 5 .7: 1 Slope X3.6: 1 S z lope Pu.....--- blic Lake 4-6 Escrmnt +� $ 8: 1 Slope 730 If 0.66 ac 1 .5 ft Escrmnt h r. 5 acft 6.7: 1 Slope „..-,--- -.---:'-':,,,,, 7 ,--,--1 ---,,-,-,1:43---7---5'-'::''';'-'-'':'---:::'''''...,,,,. _, 1 • 5ft Escrmnt . s 4: 1 Slope I 4 Lake - ub c 7 r 846 If I 0.7 ac 5 a cft t n,» , r ' ^Zti In 1;:,ALipr l G)C `liTti'll` .l l+l Irl'f 1-`"f,:.l•c—owl),1G-dI <i.r 7l i jill�t,!cl �,C v `lliil i]i ci T l}:,hli L' '1t.. L:�� t tiC L 56,,x .3�cry iii} :,td i1c_C� .fl` Page 30 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes Stru cture . Fair 0 10 20 40 60 80 *Go o d Feet . Hurn rat Area. . ate Natural Area � w'. "ems C t No Erosion a 2ft ritical Erosion 1 lake Po. Data large Height .. x3.000000 , .... x2.500000 III 'r# 02.000000 5"" . 00000 x1.000000 500.0 lakes_Nametl large em 0. R aPRIp amr;bh sa 1 ,..„:„,.,4„; _a a 3 µ e rt e i atp �. fP 3 ,,. ,,."-J• ',411: w 1.93 ft Public Lake 4-7 34 Escrmnt 846acft 1f .9:1 Slopt 0.7 ac „. A. S v lig s '44:4„t 04.4 I i 0." ,,4.,', ., i 1,, 4:j.4: visios,,,1 F .15fr '*' 20:1 Slope w ' .'Escrrnnt 7 3 Slope � „ �7 .M‘'' (-11-F1,, t7iin Ail17i yI l ill yYe i1 � 'u�i1l l t.�if l)ti4c�.,lily}'u1'�t}i tlS rCO7nmUnlq ,,,o, _,,,,\ ;i1, )c )C�}7 Cfsc}`� , ^li�il i]P_CY'�c i 7ilTc,4'�5 mo. AitbLf. ��,LJ �,It A'11. �,ZI�,lei 1,aitcl qhs�ll�tJS�r• o Fn�t Page 31 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes - - °'' structure • Fair 0 20 40 80 120 160 •G o o d Public Lak .."."'°'Natural Area Escrmnt Erasion - - - - ''Critical Erosion 5:1 Slope rf ake POInt o. rge Height •,3000000 '\ .12.500000 52.000000 •51.500000 •.....00 •,0.500000 Wka Named large 1 .3 ft Escrmnt 3.9: N�\..'°.:a° 5.7:1 Slope `' 10, 1 .52 ft Escrmnt ,;. 7.3:1 Slope ,.g 1 .3 ft Escrmnt 4.4:1 Slope ‘,,, ,,: I ,,,,,,,, - 1 .4 ft Escrmnt 6.7:1 Slope 2 ft Escrmnt .,. --.441 ,,rf 2.9:1 Slope NSE } :N 1 .5 ft Escrmnt (Public Lake 4-81 5.7:1 Slope 1877 If t : 2.42 ac 0.9 ft 21 acft Escrmnt J 5:1 Slope tvt iir , i'� kii 'ill:s�sii,i-iZ` iplc 7'?M0p y1l� 3,C011.111°u�`- op coi1htfi�Flikle Cil tGe c.oir irony, sltri v'Sit DIDNICiloh= ( iv, sli - 7E7 � , r\littisPS 1Jst1,FJ.f, i,.i-aciR1P,IC,N,iiildt.hil COS lJ, (.01 inti 1, Page 32 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes fair 0 5 10 20 30 40 •Good F--t Neturel Area Natural Area ri - eli Critical Erosion x� � ' riticat Erosion 1. y, £..,e.. L ke PoiC Data large 4- <2 500000 10. , -.,, } s ,�t Height i € £ $'£ b$ *. ayv`^ •53.000000 62.000000 �' � 1,s000ao .1.000000 50.500000 'p . RIP Pap s all irk i a? i_f. 1.4 ft Escrmnt 6.7:1 Slope 2 ft Escrmnt 6.7:1 Slope siiiii. k ;,; r ke Public Lake 4-9 788 If 0.97 ac 9 acft t 4.1 �r 5 5 Pelican 1.3 ft Escrmnt € ��� 6.7:1 Slope 1.2 ft , • EscrmntAl! , t .nom �� 8:1 Slope 1 <z 3 ✓ fr -tfeei1 t 61'27 `t;1` et t, 1 b-,.,. 1eoF \1 `51(1'(1- i c3 7--111 . - ,'Eltt Diliorm Pt inyfi�ti'`-'''' .�l yid 17.E��1:111)111:(11-'3j t tfi�ia,41c)pit 11 1K i,�arillu tnT Otrc ,it tlfi ll�,�� c v lit, Aii tt 1SJ LJCP1 IJS�1S,,'\ eEiR1L 1��N,twl rile c11S Us olilr tnl Page 33 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes K.,''',,-, I c f ;.. „ Structure , + Foir 0 15 30 60 90 20 *Good N Feet ,•_ Natural Are .� � °� Nofural Area �� � � Critical Erosion fid'. riiical Erosion x0 take Point Data large is e `' K Height x • ai j .i 53.000000 1 6 ft t ° r go# x . _ 4 ^;° .. :. ÜEEE ,' Escrmnt ..•_ S k ed large r 4: 1 Slope 0• ft �l�a 1 ft Escrmnt S . • Escrmnt 3- lit 10 5: l Slope ..�' fil ope ait#'4.'''''"':.:'.°1.:;i4;,,,1-•',,,:,,,;`;',` ,":'-':;441'7'-- .. S ^qx' k _ 4 � 1 ft Escrmnt ' � j � i.,1 � 4.4: 1 Slope :� ,: ' a Public Lake 5- 1 ft Escrmnt 1 127 If t •.. �, , 3.6: 1 Slope 1 .75 ac , 1 ft Escrmnt 16 acft _� 4.4: 1 Slope ra isb k�°r 5.7: 1 1 . 1 ft Escrmnt Slope • 0.7 ft Escrmnt g k 4.4: 1 Slope ..\''''.'*'\\'''.4.: '1'4'''''' ,..., i i -.1 I '' '... , ` i # '., t itti 1,.l Z`, -,:010111-1'" u - o it 1i1Ti)s�}itui�ltli 1. ctit CL.)int ti S7 �n'Ini', ti5i�, iS1 11C��7 yC'�5�} li lei C',ei7� l�}ill�i,C�l' ' ! \iiStG� .tl I- 115 ,r�tiloc 11,1�i,3 itel'iil�ci] t)a�i 4�ln,Gr un Page 34 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes "' s+ro�to,e 0 12.5 25 50 75 100 •Good N Feet Motorat. Areo Natural Area rz. „BYE "�; .� C tical Erosion . ......\ ' i,.---...-.-^, riiical Erosion LakePaint Data large 1 . 1 ft ; Height , .53.000000 "t Y' Via:.k T ,2.000000 • • • . .:= ." .,t �" 4 takes Named!alga x to .0, RiP Rap �mss �` 4.*d ..�s-,�.�i35�. a 44iiit * ,- 1 .5 ft Escrmnt & . i' 6.7: 1Slope . ». fl 1 ft Escrmnt 8: 1 Slope 444- 1 .5 ft Escrmnt Public Lake 5- 10 906 If 6.7: 1 Slope 1 .09 ac � . 9 acft 1 .3 ft Escrmnt. . toe:. 67. 1 Slope 1 .5 ft Escrmnt !r 000.1 6.7: 1 Slopeao ag . � � �` as 1 �,. ` B}i til»v , r t �t7 e« fitrylrlZ ¢)c)�. 4t' tap contributo ,a GISusercomm 11iStt�ctf i�e�,„ �1)17�,i�•1tl1 iee cjic,'l On i tri-'(3--i'-11'6,-1-61".6' S 1' t fE-- l�titl � , it :, 35 of 45,, Page iof Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes ! Fair ' L\ 0 15 30 60 90 120 Good N Feet _ '111 .aruea� e,.. •_ Natural Area Escrmnt ' 1 .3 ft Escrmnt `- ` "` itic °° ritical Erosion 8: l Slope 5.7: 1 Slope Height Dago •9<3m'w M <_2.500000 # ` � sz.aogoao r ,. '- •sisaa000 a 7.46 a.saaaao Wkes_Named large Rip Rap an X . T 1 .2 -,,:,...._ .11 ] :: .--- , .,, ft Escrmnt 5.7: 1 Slope e d. m 1 .2 ft ,,. ,-.,14.1.,,,,_.,:iti,..,,,,„._,.,,.....=;,,,.. ..:7;:v:., Escrmnty 8: 1 Slope ` .� Public Lake 5- 1 1 , ,� 1 .3 ft Escrmntr 1401 If 1 .5 ft "' 5.7: 1 Slope . ..., - -,, ,,,,,,....:-....,:„....,__:"....., ii,i / * - ' 1 .9 ac Escrmnt 17 acft 5: 1 Slope 1 .7 ft Escrmnt .. ,..v.f. 4,..or- � " 8: 1 Slope 0- 1 .2; ft Escrmnt 5.7: 1 slop J sPT 1 reLorme, .. L._-_,.: ,;,, - Map v t1cJj=l,7 c o ,,„...'.'64. i�iili7tii<�% -1 trl l: ,l`1G c to satrrlf�y, �7t64 �SsI,�t� s c, c.w•^ v X12�i�o.riphi ,7.„,, ry Alit' 1-,) , 1J ,11.G ri)c,Z11,JCtN. LTJ th LJae` Con ltfl!`;✓ Page 36 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes 111 0 30 60 120 180 240 G o o d � � � Feet ': Nelu rol Area 1 1 ft Escrmnt Natural Area 3.6:1 Slope ca,rei e,osion µ. . • ,.7.::,:: �� r1iical Erosroa < lake Point Data large Height mer. a <3.000000 s - � <2 500000 M.- x2.000000 •<_1.000000 \it at ,c 51.000000 ' •. � •50.500000 9 y Lakez Named large .. Rlp Rap a&gswan 1.2ft 4 Escrmnt .. -'' . '" 5:1 Slope : R . Y " Public Lake 5-1 2 .. " 2405 If � , ; 4.46 ac 43 acft 1.8 Escrmnftt 5:1 Slope � Vi ` t f „.._.1:- '-ff s 4-,0.' ,- ,g,-..„-ii,. --•,:',i.i!, , 1 Eacrrnnt 4 r- 0 4 4 1 Slope „ : n z - i 1t ,;;.i.''''..:!1 I':;!'"*., _ _°,'S,:it ' ..-'' - . - ... - ° i , 4.. , ,... - , , -.. . 1.3 ft Escrmnt `' .14''4411k:',.',,,,;.14,',111414:;t.,,.,,p,„''''''''' ''''';',,': --'. , X3.1:1 Slope ti * -, R . 1.1 ft Escrmnt 3.1:1 Slope 'Y `* -Eiw7"1,�Fu ,,L,1i't �,-`-' '' F _C`)OP?il ..;I�i)„)sc�Sl`i1 titt�?•.=1iti1 il't 't''''1.i;l lii ii tGli c�11r . I.tilt •G obe �i i�"a<' t2 YAG etct i 7111c5 C'�t� '' i f lit i)l1t fly . DS IJ i 1. US ,AeroGR 7,141,a.'t 4r _'r,-').T��Orii�tfr�l Page 37 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes srrucw ra ' ' .t !YtA � � . Fair II 0 30 60 120 180 240 •Goo d M MI Feet3r . :Z. Natural Area 1.3 ft Escrmnt d Natural Area 4.46 ac 3.1:1 Slope Critical Erosion 43 acftif . riticaI Erosion - --. ` '" take Point Oath large #.. � ! '» Height 11, _2.000000 1.1 ft Escrmnt. ` ,- 3.1:1 Slope ;.,. _ • g.5OOOOg "It-_4'.41f' '$ '3s ...sY •4 3 .e-.k ,dp� takes NameE large - ff'' ^1k�'k F'.' � . � §� � 4 yid :_ `` wt sloh 4" .6'4. :-, .,.. .;.,.. --),i -,:::::,-- i s e- -. a r . .44 r - � 'i -, A E 1.3 ft Escrmnt x r ,p _� , `b.7:1 Slope 4417, it., Escrmnt " 1E.5 ft Public Lake 5-1 3` , ,00', :1 Slope `': Escrmnt 21 10 If ' + . '4:1 Slope 2.18 ac 1.2 ft , " 17 acft _ E Escrmnt ; , •Z 4' �— 8:1 Slopes 1.3 ft Escrmnt ;,. 1.6 ft Escrmnt` -4 1 4.4:1 Slope ,4 s 4.4:1 Slope 2.2 ft Escrmnt '"r' , 6.7:1 Slope 1.3 ft Escrmnt 0. 4 '"/ 5.7:1 Slope ,. �1 1.3 ft Y= y .,,. 1 ft Escrmnt Escrmntf. �3; =. '''' k z'' ,. 8.1 Slope 10:1 Slope 0. „„_:, — „,„ r H -ip Public Lake 5-14r' 765 aIcf ; 0.7763_'5 6 T 4r, �` ;, �" 1.2 ft Escrmnt e 6.7:1 Slop, r .14tite � s .1 ' . is>. t\os,. At ij:tisi`, y1�7''.41110-11 .i1 .,.y E .:::.' 0,,-. ri>,:::::,l`„,:, u t of 'ic]u G srcom„mur i ;:'Soli Sai',t,�.� .c- o ;��ru1 i l � `Peril Stir i i \ 2 M ,. , I t: '� Airbus D ,Ust!\,LJ�Ci�,4� .t 0-°,z1/6':' 1 l l4 Gl 11� 4 ��rt Page 38 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakess 2�. Ssruc,u,e x .. 0 10 20 60 80 ' 'P:- Good • 40 Feet �; Naru>a, A,ea � �. Noturot Area C , <41 Erosie.n. #-. riticoI Erosion lake PoIM Data large �„ "� � Height ' ": x3.000000 ' . x2.500000 ,2.000000 ,1.500000 •x1.000000 '.. •x0.500000 lakes Named large ri 129 Rap all x' 4 ''''' tea" My. 4 . a� o, "ai �a � V 1.4 ft Escr , 6.7:1 Slope . a • Public Lake 5-14 765 If 0.73 ac 6 acft "- , •' { Laillik1014,'' ' * a '' ''''':'''L'-.- '1"L*,'"''''' . k VS*4' , -.,..., ::::4,..-_.. ., ,.. 1.1 Emv 67:1ft Slopescrnt w . lid*. , ),,,t1 , .44- L ,, ,,,.. - ,t-i,---„,,,,,,,,.--„ -... = ,, . 1.4:- e w 3 tea R a �,'',1,,-..-,„ 4 ti `n a, ` ': ..c Sly 5 -."'",....S',.:,'Y2ti L e dr,i c' ;lllrr virt£h t C4)�)7 it-ki--`.st1i1=1p,-,071 n siioia,lititth`COS'K�i P,4}ii12"bi iTtl 1,,,,,p''''4A-*----rt- �I�_` �',�7 0 ;-us-3iiili11(-1 Lac lj illi. (�Is�' 'gin �11" T .S1LaY�°� CS,A-roGRID,'C��, 11��"�l.'(I tI iCdri lf(l Page 39 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes ,. . Fair ril0 25 50 100 150 200 - •Good _-- - Naturoi Area Feet -� F ESCrnlnt ■ Natural Area , .. C tical Erosion Slop ,_. • O ;critical Erosion 01 lake point Data large Height .q. i.9 ft Escrmnt •53.000000 2.7:1 Slope «:a ooao Public Lake 5-2 Y ` • "'°°°°° `� '14,,,1:,,,,,,,,, b4 1 •51.000000 2929 If • 0.500000i " `'^ Lakes Named large 3.06 ac Rip Rap 25 acft 1 .7 ft 4. tea" Escrmnt ` 1.6 ft 4:1 • Slopes ' Escrmnt i ;; _ 4:1 Slope `' i ; _-.,:„: „,_. •,..4,,, •44,,7.4. :., • ., .,. .,. • ,_ _._ . . /_, •:.•,„ k f1R ft I crmnt fig' �? 3.6:1 Slope t -10-5‘ -,*- - -'--- 1,-,. .-, :,,--z,-,,,,,-, , ; .1.a -. , , ,.., .:. --.e.,,L1 ; .' _' °� .r 1r..4 f Escrmnt g 3;¢ 1 Slope F �_1 ;. Escrmnt . a r 4:1 Slope 1.7 ft Escrmnt Escrmnt i ii4 , $6 _ :.,' _..,..„,‘,.,e ii,*,,1•14;,,,,,:, ,,,,,,,.,:.:e' `i 36:1 Slope 4:1 Slopelov*I.,-;.:„.: •,,, :„.„ , .e.- -j i,-- : -...--i-',..H----• . _-------:,., Vri ' ' i,..,1., si , ilf„..,,,, .„ ,,,,,,, _. J '::‘;'Y;:': ';47.,741:71;."141:100.r , { 8. • 'k , * �`� k. 1.4.ft > 3. Escrmnt °: , - it .4':1 Slope ,�t Y .,, o- it u a �-. # 1.3 ft Escrmnt �' y • 3.6:1 Slope Escrmnt' rr 4:1 'Slope -' `,,-'_:-'-‘ .'.'44:-.:c:::';'f---c:'.:,. • s'.”' . - - -'It x J>F d!' Yat ". 1 Y.'.. ,_ ..„.,,. ,..„_.... ,,;,,,,„ -. ,...,,,. ,,-1,,, ,- ,..;,' ._, -0- s7c ERE '''[.,..,'-',01,7771-'::,, 9:',4.;.,,,„.M;,.h lidia S'OpenStreetMapcop tributa ''Ial ascii'Lr.' i C:Ouuiiitrrlt ,'tit1Gc:1'^ 1Tcpt llC\Jlcc=�ZJ7i w;~likit airy>'°,,i- j..cf TLIi., .'; AlittF� ,t) r? .'Uu;`'1 rte i1 lClit ' ' ' s Cornrnu l w: >� Page 40 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes r ��1. ,. - r • Fair F 0 15 30 60 1 ...n.90 120 o o d N ' ' ,i17 Feet 1 .5 ft Esc rmnt No , r I Natural Area C tieol Erosion , �..` k 3.6: 1 Slope critical Erosioq V �+ .< °.-�•- a �,. Lake vote oat wrye me 7,-, t Height -e.; ' gars ' * ' a stare •X3.00a000 1 .5 ft , . •==oo°°o sz°ooaao F. Escrmnt ._.` Lake, large 5: 1 Slope k°�° all - 1!!:;'-' Ft )*hi siLo#1.441 Public. 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G ticPl Erosion „�riiical Erosiop � take Point Dara urge Height GSW x3.000000 52.500000 52.000000 '«s ..-' •'1.500000 • 000000 t�x0.500000 L kes_Named large • Rip Pap an . ,. r � ��- '.1t,,#"z 't n ,rs - ,, Public Lake 6- 1 ' 1688 If . _ 1 .68 ac 13 acft ; " r 1` d r^s e . .. � Fes. . � Hz.,-,17.7.,,�-'1 ori .Nil•-17o yindfZ C�? i '1 M tp �i�i l 7tfi�ia;.11c�ul..Cil`I''''''''T ergTll `yv.Si11Gr"ti�i lc''',77,1 -1.,,,,,,, C .c t T hot 4i15 1lirbu lr; i f A r"a 111D IC 'all'1 e 1 7",,,,.,.4`�7 ip1.'t�il Page 44 of 45 Item#13 DRAFT ABB Lake Bank Erosion Study of 45 PBSD Lakes ... :: Fair 0 20 40 8041 120 160 Good N ":r Naiuroi Area Feet s I ►datura) Area e "� C iticol Erosion Critical Erosion lake Polnt Data large Height 53.000000 52.500000 52.000000 i. ®51.500000 LL. .' <1.000000 ..: .00300000 4kt %x. x �• .; { * - ' '^ usar4 LakezJJamed large ' AF',..1.,,...„..,-, ' ' ! , ...i.t.-1..,:',..,, 'f-' ,v4,,,;..11,!!!' 1 i. ^'•t— s0 , all x fir, rItv zi { � :1.,:;-'''''ir-,:ti ! 1 Public Lake 6-2 4 > i x 1402 If 1 ....A, „...t. = . - 0.72 ac 3 acft / / / lir to. s k3eas1 . < i � lIt..4:_;;!.!,, er ar 1.4 Esri,HERE, DeLorme,Mapmylndia, c 4'e`t1etMsip<G7iiIL5tUl��• • f 1 ci t S:.r ki,cn 11111 t• �iZ R� E 9?je• 1�G0.10.C 11'.1 Y..,!.:47..,...:14,7."-.,,,_-,a,., Geo ra hl ES/ 1` �5t� ,t.Q !.c \mac, 17 kid e GIS Use community Page 45 of 45 1��1f iia - __ 2_3 Rldgewood Park 1.4 3.0 3 8:1 5 Priority Lake Priority Evaluation Escarpment Slope 2_9 S1.Maanen/Sr.Tama: c.3 29 4.1:1 3._. 5 Very High 23.0 21:1 2_8 Pelican Bay Golf 1.B 2.7 00:1 3.1.1 5 5 High 22.5 2 2:1 4_1 0 Pelican Bay Golf :7 29 4.1:1 3.1:1 5 4 Moderate 22.0 23:1 4_1 Oakmont Pork 1.7 i.6 4.1:1 2.5.1 5 3 tow 21.5 24:1 4_3 Pelican Bay Golf 1.9 2.4 5.6:1 2.9:1 5 2 Very LOW 21.0 2 6:1 2_4 Georgetown I.7 22 361 ,.5.1 5 1 None <1.0 2811 2_5 Ge0,gelown 1.8 2.2 3.01 c0' 5 4_1 1 Ploo,Boy 201 1.7 2.4 5.1:1 4C,: 4 2_7 Pelican Bay Golf 1.3 2.3 6.51 4.0-1 4 1_6 21dge Way/8000 Mar I.B 2.3 4.4.1 33:1 4 3 3 Sr.Andrews/Willow Brook/Sand PO ylo I S 23 39:1 33:1 4 5_1 3 Boy Wary Shoe, 1.4 22 5.61 421 4 2_2 Ridgewood Park 10 2.2 221 20.1 4 4_5 Pelican Bay Golf 1 0 21 5.2:1 3 4 1_3 Bridge Way/Terra Mor 1.4 21 42:1 2.5:1 4 4_8 Pelican Bay Golf 1.4 20 47.1 29d 4 4_4 Pelican Boy Golf 1.. 29 5.41 4.3.; 4 4_7 Pelican Bay Golf 1.6 .9 5.01 J.E.. 4 5_2 630,60ee of P0Acon Bay l.5 r9 17:1 2.7.1 4 1_7 0.9 1.9 37:1 2.4,1 4 3_7 Pelican Bay Golf 1 6 1.9 7.4:1 53 1 4 5_5 Comm..,Park 1 3 I.9. 50.1 36.1 4 3_5 Pelican Bay Golf 12 18 7.51 151 4 5_3 A-lan 1.5 1.9 41:1 23,1 4 5_1 2 Boy Colony Shoe, 1.3 1.8 161 3.1:1 4 4_6 Pelican Bay Golf 1 65.1:1 16:1 4 5_1 Pelican Bay CammNry Ceme, .-0 1.6 4.5.. ...6.1 4 3_1 Oak Lake sancwry C.9 1.5 2.. 4 4 3_6 Pelican Bay Golf 1 _I 113:1 3 4_9 Pelican Bay Golf I5 7.0:1 __1 3 2_6 Pelican Bay Golf 14 1.8 ..C. .I 3 2_1 0 0anredal,Maisonette, 13 1.8 5 5.1 3 2_1 2 Pelican Bay Golf 1.3 I.8 11.1:1 4.C:1 3 4_2 Pelican Boy Golf 1.4 1.8 4.9:1 4 0 I 3 5_1 1 Bay Colony Shoes 1.3 1.7 011 SO i 3 5_9 Boy ColonyBore, 1 4 1 7 6.41 3 5_1 0 Boy Colany Shores I 3 1.5 6.9:1 b...l 3 5_1_4 Boy Colony Shoes 1.2 14 6.31 441 3 1 8 Waldorf Astoria 1.0 I.4 17:1 _... 3 2_1 Pelican Bay woody 0 6 I.2 9.5:1 3 1_5 Bridge Way/Terra Mo, 07 07 5.7:1 571 2 1_4 Bridge Way/Tierra Mar 11:1 JA.- 2 6_1 Trieste 1 6_2 ...Carlton Hotel . . - - 1