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HomeMy WebLinkAboutSP201800016 Other Special Use Permit 2018-11-19 i. " s •. '.Y J ,t. l t I\ ,. . ''.\S'e. 44,1 � • .*.*'. .'." . . Ill s‘ , . ' 1 \ \ I . imaumiiescl766'1,...'1..:::::•:':',.,%,•"''''''.":";:'-':•::•;•••;.:;.: :":'• . / . N�j '[_� • 4! }-, �,_ i. III talWAlb \\ \\ \ , 1 ...; • EID . .:. / %.... . 1 OPEN SPACE tt - , ffilli ::' 18,850 SF \ ) t(-/-/--'-' ..„ . . ., . # '-,,,, ,er' /. - • . ... „: .... kL o ,_ . ...T............. .--,-,-.^---''----''-. D ...ram �" ......., SOO RIRR. ow. \H\'..:...!.\....,:..:,:.\.....•.,."\.,.!. :.-..\:,„.... . ..,. _._,......2...........1.•.11.,1.1.1.1..1.s.....:y.i . I . . , `, t -- - :. toiwsr 1001e • fMas • _.,(----_...,_- r i y,p ' ':/ _, i :•:'.' :_.,. 4 Z ......,__,_ __ ::.N:.:i.,..i.v:mg,::::....: , ' /, '+•� .ZV - ,// -.._�„ -v„„-�.-r-..vim-�wv`r`^'-"..--.-�.�.-.-. v� __-. ..... ,_, .. ,_,__ ..7 .... _. . .... _ ....,.. ------- T11117J II _,.....•_,---- .... �_ ... ,L,.1,;*; LOTTESV& 1 L ;iTY ECOVILI_AGE CHARLOTTESVILLE SPECIAL USE PERMIT: SUPPLIMENTARY DOCUMENTATION • NARRATIVE SUMMARY • PRESERVED SLOPE DISTURBANCE • EXISTING AND PROPOSED STORMWATER SPECIAL USE PERMIT: NARRATIVE SUMMARY Requested Zoning: Special Use Permit per Sec. 30.7.4(2) to allow for disturbance of preserved slopes for a private accessway 'We envision humanity living in a peaceful, healthy, ? 1 j ,� 5. / ��c �� , \ l`�`` joyful, sustainable, just, compassionate and very o A- / ° `r %\/�� alive world. We envision people living intentional, ' ° . °° R o�' \` m G.--,,, o \�/,, passionate, and compassionate lives that nurture o '" Fs r themselves, others, and the earth.' D L�►cF< 7 , f . % — Ecovillage Charlottesville Vision Statement . �73; L...— ! ► '0< K Ecovillage is a unique and innovative � , subdivision development, that is looking to promote appropriate density, pedestrian friendly access, and CO1' �ti community oriented housing within the developmenti o , °oa ` areas of Albemarle County. The proposal is for 36 �, 9 2 units on a 6.518 AC parcel. A special use permit 0; 1; 'o ° �, " TMP 61-210 to allow disturbance of steep slopes (preserved) is requested to allow for a new entrance to be located _� f at a safe distance along Rio Road East. The layout �� ill- x of the development provides for pedestrian oriented :I:- f streetscape frontage for the homes by locating all F. \ 3� vehicular traffic and parkingareas alongthe outer 4/'> �� . r fi rim of the development. A network of pedestrian ,. paths weave through the development, promoting 631 „ - {` Charlottesville City connectivity and walkability across the site's 70 Using the Identify tool, A ._ click inside the City to launch the City's`GIS viewer. FT elevation change. Granting of this request will ;=- 4 v`'t. allow Ecovillage to develop in a manner that is / 4y' co '+� cy appropriately scaled, cognizant of the safety of '� �° \ e'l ., �' residents and guests when accessing the site, and ., primarily pedestrian where vehicles are secondary to Parcel: TMP 61-210 Image from Albemarle County GIS the internal pedestrian connections. Existing Zoning: R-4 Residential The property has 18,609 SF of managed Total Acreage: 6.518 AC steep slopes and 56,871 SF of preserved slopes. To Proposed: 11 Single Family Homes develop this property at a density that is appropriate, 25 Townhomes efficient for the development areas, and provide a safe point of access, the preserved slopes are projected to be disturbed. * Copy sampled from Special Use Permit Application. Full letter has been provided to County separately. STEEP SLOPES: PRESERVED SLOPES • Existing entrance does not meet VDOT standards for sight distance (recorded speed) or stopping distance • Proposed entrance meets VDOT standards for sight distance (recorded speed) and stopping distance ' ' �/ ��� ' \ ECOVILLAGE•• PRESERVED SLOPES DISTURBANCE EXHIBIT • ,// • 1 \\ / In total the project proposes to disturb approximitely 9,777 SF of preserved slope of approximately / / ' / / \\ / 56,872 SF existing on site. The disturbed slopes will accommodate a new entrance, parking, and '/;'/ ;';' /, , / 1' \�' /' / ^ \\\`;\\ \\ / adequate travelway widths around an existing structure. l / 1I \ / / / ; , / / , , , I ; i / r\ `\' \ \ ) Proposed contours are turned off for clarity, see SDP 201800056. 1 1 , 1 I , / , , 1 I / \\ '' / `' \ / \' \ .\\ \ , / 1 ' ' ' ' 1 1 ' r , I / PROPOSED ENTRANCE ,^^ _ \ \ \ \\ - ' 1 I , \ 1/ i , I ; �`/ y ' i i / i \\�\•\�\\`.\ i i 1 ; �� i 11 1 \\ \\ \\ \\ i i \ \ r ' • / l I 1 I / I I , I , y.- I I / i ,/ __---� Ns\\-„,„ \ t ,I/ / / /' / \ \I \\ \\ , j 1 I \ ,'/ ` / I 1 I I I I I 1 / 1 , 1 _--- --- \\ \ l^ //' / \ \ 1 I 1 / 1 I I I I I I 1 I I I 1 1 , , I I __.� \�^^^ /_ - / I \ , 1 I I I ' I I I I 11 * * I I ' 1 _- \� \ ^ / 1 I I / I I I 11 I 1 I I ------- -�\ `�'�`^\`, ` l / I / / I 11 I I I I I 1 1 I I I I l , I I ---- _ - --�`� \�-. . `\\\ \ \ 1 I / 1 / I 1 I I , \ ..... \ \\ \ ' I-/ ' ... ._ / --- I I 1 ' r ' r' --- -- ------ _1'`\\\`\ ^ I \ \ 1 I I I \ �� 1 / ... 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HEIGHT OF \ \ \ \ / \\ \ \ \ \ \ \, __, / ii • / \ I I 1it. -- EX. WHITE "yam \ \ \\ \ \ \\ \ �\ \ \ \\ \ \ \ \ \ `--- / y • \ / I 1 OBJECT=379.5' \ 1 STRIPE @ \ \ \ \ \ / \ \ = `� \ \ \\ \\ \\\ \\ \ /' \ \\ \ \\ \ \\\ - \ --_ / / \ \\ 1 tiN \ Z _ ,-_ \\ \ \ \ \ 4/' I •�9(,y \\\\\\\\\\ \\\ / NEW CG-6 \\ \\ �\ �:�`�:�' 0 ' N ''' \ \ \ ',/ - -- -- --,-._,. . \\,�/ 11111 -____-_ - \\\\\\\\. \\\\\ •\ , p 2S \\\\\\ \ \\`\ \\ \\\ \`INCREA.E \\ ®® // \ \ �� \\ $11 / - \\\\ \\\\\\t I I\\ \ : ° ' \\ R •S/� \• \\\\ \ \, \ ROW OTHlirliktiVOISIPall1111 1 1 1 \ \�\\ BY 10' i>' •4, \\\\\‘.\\•,\ \ \ ‘ \ Ail . \,4 -41% `� \\\\�\\�\\\\�\\�\�\\�•\�\ \ \ • Y \‘`,.\\\\\ .\\\\\ \\\ \ LEFT TURN Q ® 4,.. II \ / \ \ \ \ \\N1/4,:. \\\ \ \ \ LANE (351111% IN Iv 1 • \ \ \ HEIGHT OF \ \ \ \ \ \\ \\ 1 \ \ OBJECT-389.5'\ \\\ \ \ •\ \ \ PH DESIGN , "all". / t N 4 #40 , .. ., 1 i ‘ \ \ \\ \\\\ \\ \\ \ \ \-",:-\:N\ \ \ \ N \ \ PALI" Ili • 1% , , ....__ _-----_. . , . .. . ,, ,,. \\ \ ,\, \ \ , ,, , , \s, „ . ..N . E0- Air.40 HEIG• 0 t1 I '1/4 \ \ s \ N\ \ • ''' N 1:11• 41 ‘\ NioNtto. INV YE= ' .5 1-__ 'ts:`: ,,,,,,,,N / 40 / ' , \ \ , , 4 it* , \ \ \\'‘,' /I i 1 , , . , . \\:.\,.„ \ \ --.., . -3't'A?-4-'4,-. \ i 7k -41k- _-___-__ - __- - \ , // , ,, \.... , \ \ \\ \ \\\ \ \\ \ \\ \ \\ \\ \\•\\ \\ \\\\\\\\\\\ \\\`\ ♦ • �!j �pNf�fAR .•_ 0: /• \ N3ERSECTION\ 2DEX. SIGHT `� _ / � \\ \ \ \ \ \\ \ \ \ v \ ` `� \ 9p 35 MP ANC SHOULDER �/__ __ \,\ \ /'� \ \ \ \ \ \ \ \ \. \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \•'� � ' / F•- DIST ISTANCE / l\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ �\ \ \ \ \ / �� U EASEMENT — _ / .......\,,,\\ \\I s\ \\\/\\:\\\\\\.\\\\\,,,,,::\ss s:\\\\\\\,,,\\\.\\\\\\:.\\\\ \\\\\::\\\\\\S\\\\\\\\\>".\.:,,,, \\•<:\\s,\\\\\ \\ s,:\ \\\ s.: ::., s'....., ,,,,„ ,% \\„ , 1 \\\ \\ \\ \\ \\ \ \\\\\\\\ \\ \\\ . \\ \\ \\\\ \\ \ \\ \\ \\\ \ _ \ \` ` itir,SfTAi- _ �O I HEIGHT" I // .r / \ \ \ \ \ \ \ \ \ \ \ •\ \\ \ .0 \ \ \ \ \ \ \ \ \\ \\ \\ \\\ \ _ �\ '`y \\` • �1 / �— `•��iVis BJECT=413.5"• -' / / / \\\ I . \ \ \ \ \\ \\ \ \ \ \ \ , \ \ \ \ \ \ \ \\ \ \ \\ \\� / /'� \\\ \ a ti►._- / EX.`WHITE �\ 1 \\ \\\ \\ \ \ \ \\ \ \\\ \ \ \ \ \ \\\\ \\ \ \\ \\ __—�� / ��-�_� \ \1\ ` •�\\_\\ • _ STRIPE _ - \�\\ \\ \ \•\ \ \ \ \ \ \ \\ \ \ •\ •\ \ •\ \ \\ \\ \ NI \\\ ///// \ \\ \\ \ \ I INCREASE \\ / i - -\\\ \\\ \ \c„\\ \ \ \ \ \/\ \ \ \ \ \ \ \ \ \ \ \ \ \ // / / /'�\ \ \ \\ \\ \ \ 1 \ \ • \ \ •\ •t \ \ \ \\ \ \ \\ \ \ \ \ \ / / / \ \ Sz'n I ROW WIDTHS f- \ -�\ \ \\ \ \\ \\\\ \. \ \ \ \ \\ \ \\ \ \ \ \ \ \ \ \\ \ / / // / /t 1 1 1 \ \ \ \ \ p 10' \ 1 '///'I_----__\ \\\\ \ \ \ \ \ \ \' \\ \ \ \\ \\\\\\\\\\\\\ \ \ \ \\ �� ``�_ \/// ///'� 1 I 1 1 \ \ \\ \\ \ \ \ \ \\ \\ \ ` — `` �1 �� • \• / ///i --- \\ \\\\ \ \\ \ \\\\ \\ \\\ \\ \\ \ \ \ \ \ \\\\\ \ \ \ _ �/// // 1 1 1 1\ u'� \ \ \ \\ \\ \\ \\ \\ \ '__ • i // \ \ \ ., \\ \ \ \\\\ \\ \ \ \ \\ \ \ \ \ \ \ \ \ \ \�_ / / / // 1 1 \ \ Q \ \ \ \ \ ---- r \ \\ \. \\ \\ \\ \ ; \ \ \\\\\\ \\ \\\\\ \ \ \ ------- — 1 ' POTENTIAL AREA OF DISTURBANCE REMOVED WITH RECEIPT OF VDOT WAIVER 1,.=50' /N\ ENTRANCE: SPEED STUDY • Rio Rd E. average recorded speed is below the posted speed EPRI3c TRANSPORTATION COMMUNITY PLANNING URBAN DESIGN 902 EAST JEFFERSON ST.,#101,CHARLOTTESVILLE,VA 22902 MEMORANDUM TO: JUSTIN SHIMP,P.E. FROM:BILL WUENSCH,P.E.,PTOE The speed report for this data indicates that the 85th percentile speed is: ORGANIZATION: SHIMP ENGINEERING DATE: MAY 11,2018 • Easterly Count just west of Agnese Street was 29mph for NB and 31 mph for SB Rio PHONE NUMBER: SENDER'S REFERENCE NUMBER: Road. Re: Rio Road Speed Study YOUR REFERENCE NUMBER:_..._.-_._._.-.._ EFER_..__.._ .__.........._.............._.....__......____...._...__._ _____..__. • Westerly County just east of Atwood Lane was 30mph for NB and 29 mph for SB Rio Road. 0 URGENT X FOR YOUR USE 0 PLEASE COMMENT ❑PLEASE REPLY ❑PLEASE RECYCLE A graphic illustrating the locations and findings is shown below. The speed study data reports are attached. PURPOSE EPR was asked to perform a speed study along Rio Road in the vicinity of a proposed entrance that will be located in the section between Agnese Road and Alwood Lane. SPEED STUDY fss- Rio Road is a rural typical section two lane roadway that connects downtown Charlottesville's Park Street on the south to 29 mph northbound ' ' Route 29, and points west, on the north. Rio 31 mph southbound Road is classified as a minor arterial roadway � • per the VDOT roadway classification mapping. The posted speed limit is 35 mph. 30 mph northbound 29 mph southbound ;_ The speed study was conducted utilizing two automated tube counters. The tubes were installed approximately 155' east of Alwood Lane (westerly count) and also 135' west of Agnese Street (easterly count). The easterly counter was in place from Wednesday 4-18-18 through Thursday 4-19-18, and the westerly counter was in place from Tuesday 5-1-18 through Wednesday 5-2-18. Note that both counters were originally placed on the same day but the westerly counter had a tube failure thus had to be re-set for the 2nd count. This data provides END OF MEMORANDUM 48 hours of counting at each location. Attachments—Speed reports *Full EPR PC report has been provided to VDOT. Full report can be provided to County upon request. / ) t / ,. '' r c r r oy`° / rSTORMINATER: PRE-DEVELOPMENfi t -...., ,,,,,,/„,-/ ":/ \- ' „, ,/ / r/f - ,;,/ / / i , , , , , .._ // , ,/ --------- , , , , , , The drainage area to the ditches along Rio Rd E. reaches beyond the --- %/' / 1\ / I ;; ,%; ' / 111111 , 11 / i <- ! ; I ; ; Ecovillage property, to a total drainage area of 10.7 AC. Improvments ' / ' ' ' ' ' ' "''/ '/ ' ' / %' ' ' ' ' ` 1 ' I ' I Iputt I r / / / , , , /, r//+ / / i i i / .,/ -• / i , , , 1 + 1 I r / ,' � 1' ' \ / /�///' �// : \ , ,//% i /' ' i I I I I along Rio Rd E. will take into account the larger drainage area to address ' iI / 1 / ,---- ' „///, / / / j,' /' / /' / ./ r%' /- 1 i i I i 1 I `_i downstream erosion. Currently the conditions along Rio Rd E. do not , j /'' /-_ '/ I -- /' - --\ I l 111, 1 ____- adequately address stormwater drainage in the following ways: - / /' / 1 \-i , ` -_------\ ' / / 1 -::--111 = ,1 \ ` t --__----, / '' 'ji \ , „ I I , / ,\ „ , f, , , 1 `\`� - ... ;' ,/' + •I i , \j .'' '� + i' / r ' I , 'i i/, .gip'`,,\`\\ \\`\ \' ---- • Inadequate drainage ditches along Rio Rd E. / • Lead to overflowingditches and erosion I , ` \ ' I L` "• ' - ' r/1 1 1 `_-- -------- • Clogged and inadequate drainage inlets __________-_ - -- 1 \\ 1" ; -- - • Lead to backupand pooling ', ` . \\,\ 1 _ -__=-- --- /' ,/ 1 'I '-- `.� \` \ \ I - ' <' {i _ _-------"--- \ \ 11ti \ `, \\` \\ \\ i 1 \ 1`\ \\1\ \ `.1 1 1 t\\\. �\` ` \` - \ ---\ ';;IRLv.„,,.......„..''' �� .-\. \ \ \1 '' ' \ \ \ I -- \\ \ \ \\ ``'\ j/ I ' �\ '�`. I 1 1 i i 11 i i i '' \ �\ — ` \ ill \� `\`_ \` \ r i ' I ,`i ' \ \\`,'` ,`�'` �'`\``�` \ \ —' _ ---- ' i i �\ `��__ I I \\ �1,,, \`` .\' `\'' ,,` \ ; I 1 \ , I 11. ' - , '5.2 ACRE'CURRENT ----- __------ /i' ' 7J_ v \ 1 1 I 11 , j 1 ,, \..--` �:` '\'`. \ • �\ \ '` \ I S I \ 1 \ \ '• DRAINAGE AREA. '%� I! 1 1--y--- 1 t\ \\\ / ; ` \, 1 I { \ , \ \ - _ ---- --\ CN=60.PEAK 10-YR - --,\ i',;l - I I t ;' i 1 1 1 I 1 1 I /% \ \'\\` \ ` '`, I , , I I \ , % \ \ \ \ \ ' —' — — — ' i i 1 / '`'t r I r r I i s I ! + + i +1, \ ` �\ / \ 1 I ! I 1 1 1 \ ' \ \ \ RUNOFF = 10.3 CFS !"\\ \\ i,/ " Is, \ _- = /` I I ' 'I'I I !I 1 /; 1;\ 1 i ,+ \\ 1 ' \``'``\'\ ' + ' ' ' , ' ' I i \\\`\�'`'\,\ \ _ — _ —__— `\,\\1 t •`\\ \' _ \�/'`', + \\\��� `_— ^� +�' \ � \ / %/ +r I a I ' �' \ i 1 �'\` i'` `' ` till I , I I I 1 ' `'`t \\\ ` \ ` \ `` \\I i\ \ `\ \ - %:/ i \\`` , \ \ ' f l / I 1 r I i I 1 7 / E t \\ \\ ,rt 1 i ,\t\ i + i I ' i i ' I l \ ,` \ , ` `��-- —` ^\ ,`1 `'\,```\ '` \\`~ —''\'' +``\\`\ ```''' 1 \— \~,` \ ' _ ' ' /: ,' /r ,i / + r � 1 I ' i ,1\ ` -- `` \\\\ �i'� '��\ i I i \\i I I I i I { I i \, \ ` \` \ \ \; ------'--'--- -- \ ,`k\ ` - - — \ ,'`````. `' \\'`•�./A • j \\``�\` \ ,``,' �\ `t II/ ,///'/,,,�I ,'. 1, , \, •`\r \'� \, I ' \\\ i � ' ' I 1 �\ `\` \ \ \ ' t , _ --- -- �\\\\ `\ \;�\ `\, ,` � i ;':`�~'�'`,\ —\ . �i�7 iNN. '`'\ \ `\ i , i \ . // Ij" i'/'// / ''\ / � ; 1 / , i/ '; ' `t` '111 t. t` I , ,,, , , , , , , \ _ - ----' —\ ---- - ' --------- ' ' /.k''i .. / t , \ � I \ ,�`\ 1 , \ I t , --r i--i \ ._`-��L-- --�`' • \'` \ ss ,\ '` \\ \ -\ _ %i / /i - i i I ` * "." � �' /', / / / l "(i / \`` 11 \ \\ I / t` i' ,I \ ' \ ' -- _ ---- ' -- - ��� \. \ \ \��—•-• _ �_�'// / ''/ / `,` :'' '' 1 r `+,,1 1 i ,{/�// \\\ / / / I 1 1 1 I y \\?, r / \r 111 \\ ' _-^'S- r_ ,\'`. \ \ • \ - "- - ' '/ri/ %' i r 1 i 1 r i Yf/r ,`./ \ / / / l I ; r r1 �\ \`\\ �' INLET 2 1 '� --,a,,, ,‘,,,, „`‘,‘� ; \ \\ _ /� \ 1 ' 1 ' '' ' i ' I I \,.`'. /' CULVERT \ \ • \,. , \ \\` `\� I 1 1 `.> ;//;,, / i / / I 1 + I ,, , \ PEAK 10-YR RUNOFF AT - -� \ \ \ �'% /''• '` / I \ \ • _--- \ \, \ 3.6 ACRE CURRENT \• \ \ INLET 17.4CFS --------------- - \ `\. t.;\ r \ '- ///'/�/i ,/ /// ' /,/; '/ / I I +Ir \ \\ \ ' " - --- _-- - : :: , \ ` ,, \ \ I \ • DRAINAGE AREA TO �/i 1 . / //;/ :/;;, %/; ;/ / 1 11 II CULVERT.CN=58. 1 / / / \ • / / I ` \ ;, \` \ PEAK 10-YR RUNOFF AT - 4I /, /'; / / ;' 1 / \\ \ \ / I •1 / \ \ \ \ \'. \\ CULVERT = 7.8 CFS , 1 I .'` ;/ / ' 1I I I; 1 / i /' > %''"` \ \� 1 \ \- \ \ --�\ I, \ \ \ 1.9 ACRE CURRENT /,, 1 / / ;','l /;'/%/ .- \ \ \ \ - ; , � \ , DRAINAGE AREA TO INLET 1 ;i'/ \ ';/+ /,, / / it'll ; ;/ / \ \ \ \ \\ 1 1 \, \ \ 51 PEAK 10-YR RUNOFF'j// / /; ', . / / 1 , r` / / / / \ AN, ! \ �. • I ; , \ \ \ \ AT INLET 1 = 2.4_CFS /71 '/; /: / ._ ----- /;,is,ss. 1 i;i i .' / / . yam- `\\ \`, , / \ _ \ iii----.. , , , , , , \ , _ - i , , I ‘S‘ ::--:::7\",:\ I\\,:: /' / y \\\ ``I\s‘'‘'‘,1`` \,:s,`f,s\s,• \s•,,S,,\::ss.''‘‘;::\, v,\,:,/x ` IN 1 � ›. `:' ___ _ / fc1,:7:::::::11,1,,, ,,;,;/:�',,' � / /' \ ' i , „ j , t 'rr'+ , , 1 , / _ \:. .\ \ -" 1 \'‘, , , , \ _ / I mil \ / /,-, \\ STORMWATER: EXISTING CONDITION SCHEMATIC • Existing inadequate drainage along Rio Rd East is causing adverse impacts to downhill properties, specifically TMP#61-190. • See following sheets for photo evidence at locations A-D t 1 1 / , 1 1 i 1\ \ \\• ` \\ \\ ----- \ \ `'\ ` \ \ \ \ i • _ •\ / \ \ -\ • • \\\ I I J 1 \ \ \ \ \\ \\ \\ \ \_` `pwrry/-�{ }^{ = ``\\\ \ `\ \ \.\`\ \, \\ \\_,,;;, \\ \ —1• \ ��'� // s t \I tt \ % \\ N G —, ; 1 \ 1 I _ \O` \ . \ \ \ \ . \ . \ \ \\ \\ ; / ,Ali —`.\\, J -- -------. .. — _—VIA --witill _ .,, .. ,/, ' ` \ , \s`\ \ \\ \ \\ ----„, \ 1 11 - �,;,,.�cte----pu.-_.- \ � \ .. \ \ , , \ \ --- \ — /w--^'` / \ \� d -' / 1 I i I I I \ t t. t I iI\ - `,\ \ \ "Tani—�`. \"..ac.\ , ` `\ , \\ \ , \\ \ `_ ,w—� i i i /t• \ `\ '- / \ I I 1 ; \ 1 I 1 ^ 1\ G \\ \ \\ \ \ \ \` - - \ 1 ; III 'I - -+L 1 1 I / `v - _ -'.I► _\ y v `� Av Av• \V AV • - v ,, i A Av vv .� . 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( / j/ ' /i , Y—��1�/— ��` \\\\I \ \\\\\�N \_ `•••V • v���,[N `\\ , \ — t 1 i II �1I I \• / 'i A/// f --,. -,,.....,,,..-...\\ vs.\\\\ \\\ \ \ ‘.. / , / 1 I 1 ,/ /. \ \•\ \ \ \\`�\,\ \\\ \ \ \ \'.. , N\'• ' `\ `• \ \ \ I I 1 i i J i j i /%—_ _�'/ \�\ \ i \ 1\ \\\\\\�\�\\,\\\\• `\ �� \ lC�.(� �`\ �`\ \\ _ \ \ \\\ \ '\ 1, 1\ I \ 1 _ �:I�!,:. / \ \ - � -- `\ I \ \ \ \ \ \ \ \ \ - _------ - .! - \ \ t\ \ \\\,\\\ \,\ \��` \\. •\ ` • \ , EXISTING \ \ - _ , 'i; � M 64-19 ii- `\ \ \\ \\ \ \\\\,1 4 I � 1 \\\\�\\\\ \\ \\,\.�` t 'N\ _ - ' I I I 1 \\ \\ \\\ \ \ \\ \^ -"' _%/1Jf�:- I .\\ \\ \\ \ \\\, 4l I \\\\ \\\\ \,\ \, \; \ ' \ -"-"�i I I 1 \\ \\ \\ \ \\ \\ _ !_/!`, / 1 AI /// `\ \, \\\ \`• ,`\ `\ ;\ , , \\ \\\\\`\``�\\` \ \ �. ��- \ \ \ INAD QI�ATE�ITCH �- y/ x' \ sc \\ \ \ • `` \\\\ \\ \\ \\\\\\\\\ \ \,\\\\\ \\ `\ `\ \ `\ DRAINAGE CAPAC111C ' MEADOW \\ , \•, \\`\ \\ \\` .\\ ,\ \ . . , � • \ \\ `\ `` , � �:` , �\ ". , r/ / \` -^. l , ; ;/, \\ :y f\ ;.\\\ \. \\ \. \\\\\ \,\\\ \ , \\\, \ \ \ .\ `.\ \\ \\`___` ;--- ``.�. - .'► . - \\ ,A j/ ' I /, CREEK ` \ . \ \\` X . -- --- ,:-. -\ / ; \ / , \ \ , • f \ \ \ NTS N STORMWATER: SITE DOCUMENTATION 01 EXISTING ECOVILLAGE ENTRANCE ° 'a ,, '�. ..„.... ..,., ..,., .. ,..„....„...;,....,"....;:.: „.7,,,,,„,..,.„.„.„•;.....„ `}, * �.,........,-.,:,••1„.„,:-...,„„4„,:„.„,:,,,,,,„.„...„..u ::.;:.., ... ., ,„:7,,, * . . « •--':,:;.,.'•(.4','',.:i-.•:::,....:..,,• . 3r a r. ADJACENT DRIVE-V'JAV .. _ ENTRANCE {.. .:.• .. +e. f�+R$ it _.._._. ._..__ .,, _ d° _:..,. ._.... _v..--, _ .. ay ., am.• 0,t,0,,., • `: • 11\ . ' ;:: 'r ' r. J.. ; � . INADEQUATE CHANNEL y INADEQUATE CHANNEL a 4 ,. ..' Ly �, •`s i^.- _'�a'K� � Y '�»'+.n+r," '^!W .. fiR x orr F • . `+ #, .,_.R R.... ;+s., to t.' • -..—. ..a.:= . .., .. ,.. .:f-, .-ai� ..- w",+ !.:.'.. .., -.:_.r. "sv... ,.', � x..a :.•t' 1. aw, :,:-. rF .- .. , n lc .. .. ..:w' : ,'✓i , 3 .=•3',., .-' .,...:., ,,' t� _ fix. a,a !&+. .,..... .... .gym..^< .,'z 3,'�;.,$ �,. ,`x ;. �.aG'. _ - i.,S- a: c..."F ^' «.....,, ,. 54w z, 'iklst, ,'.. V. • hXx t - .... ,. ...:..w .. .. .^b<.. ' '' :..�:,. .. : .' • • ., � -.'.v �;;:" .E i:r�� �.' § -� - � r+f "sa,.. Pi �: ,, ..... , . _ ,s fi \ :.,. . — ... ' . TMP#61-190 HOUSE tom" z. yY . ,.. 4 `2 -' '- SHEET FLOW ACROSS RIO RD + E.FROM ALWOOD LN -,- --- ""r... ' - ....„..7_,-„.,-,,,,,.:::::7; ,-........:,....::,...,.:,...;:.....i_,.. 7. . __ .-..,,,,,,:„...-.,--:_.-.,_,.:,._,..._-..... .---J, • ti INADEQUATE °' :,,' ..:1,.:::::::firj.i!,-.,..,;,,,-iir;',,';.,:...:::1,..E;:2.i.,,;..ii,41,,A,':4::i..:{:::.i.: DRAINAGE CHANNEL tt* IAD NEQUATE PIPE , . - EROSION CAUSES OVERFLOW ' RAIN IMAGES CAPTURED ON 10/22/2018 STORMWATER: SITE DOCUMENTATION 02 sI ,...7 f ,,::,,, f . f I r •-•••. ' D . . :,, :„.„,„. ., ,..„... --.44,1,-:,-,""'..,1.. • ll . ,„ . ,. ..,. , ,,,y. , . A J R.t1t • • 4t' , • DRAINAGE INLET SHEET FLOW ACRQSS RIO RD A � .: SHEET FLOW -' DEBRIS BLOCKAGE —_- FROM ALWOOD_ LN? h £ .' , . . , .;•:.,-.F.- . --:.--.A.'.:-.-....;t.';.' - •- , ' -..:,..--,t,...- -,.. ----4.:...„ ,,,, ".:-''''' , ...- _,, ...:::,,, -„,,,,,,,,:: , . • �. >ys • 4'fi 1`$` ',. i }y Y'"d '�'hir - { Y <�a•.. _➢ -.st'/-.. * ` '' 7. 'r r .> '� INADEQUATE - k ` r�' '° r DRAINAGE CHANNEL - - s"• +..,4' 'a"t' 1F.fit°^ .. , r � � - - rs .�.. .s�,�iii 8W 3 • s - - -4y'i ..gym.- ✓ .< .9'' t - *... _..._�. ., - RAIN IMAGES CAPTURED ON 10/22/2018 STORMWATER IMPROVEMENTS Stormwater improvements along Rio Rd. E. will address the entire contributing drainage area as well as post-development drainage calculations for Ecovillage. Four approaches will be implemented to immediately improve Rio Rd East Drainage, which tie into future Ecovillage runoff calculations. • Improve ditch capacity and velocity (prevent erosion) • Improve size of drainage inlets (better conveyence) • Regrade portion of Allwood Lane entrance (within ROW for better conveyence) • Convey stormwater to Moores Creek floodplain (prevent erosion) All channel sizing shall account for post-development conditions from the Ecovillage site and contributing drainage areas. All storm runoff shall comply with DEQ and VDOT regulations. SUMMARY: Overall objective is to capture more stormwater run off further upstream of existing inadequate areas. INLET 1 - FLOW INCREASED BY 12.9 CFS (740%) • More area rooted to inlet 1 , inlet size increased CULVERT - FLOW REDUCED BY 5.O CFS (22%) • less area to culvert, improve ditch INLET 2 - FLOW REDUCED BY 4.8 CFS (56%) • less total area to inlet „, ,i<00,0000,._ -7: - -.,,, ,s. ST9RM VVATE R:POi$1TD EVE LO PM EN I , , , , ,- • , , . , , . . . , , .- • �' - , ,- , , , _, , , „......., • .. ,, , , .. , . , , , . \ \ \ _ \ „ , , , ,._ , „ , _ , .,. - , , _ _„,, „ .,., .,,.... , / ti �y,`` V \ A \ i t r /' / / ,A.� I r A � / // / / i I r r /_______....-- ,._ , „ , „ /,„_, , .., „ „,. .. , ------- .. , ,... . , , , , , ,, , ,,e7 - // ,z,-,,;:,-- _ ---_ , , ; ,, . \ „ , „ „ , ; ----- _.,,,, ,.. ,,,. ,. ,„ , , ... ..__- _ , . I r %r \1 1 1 , A / / ' / i / i `,AV\�. V A ,, r ! I / , ``A�` ' \ r . / r - ,/ / ' 'r r V. / r ) / //' i / i / / _ i I I r % r ' r • / `` \ 1�'\ \ \ \ 1r' / `(` /- ' \ /' /' / /' ' r ` , / /,�/ i / .. /./ ter ' r it I r ' 1 r ' / �% / r r r / / r r r \ � / r � 1 r / / r r 1 , ,' \ \` 1 ' i \s, ,``'` \ `\_-__ / /': 1 .,% r ' ,, ' l i` /' r / i�'/r//� /' / / //' / i , r / i r r , I 1 r 1 , ,, , 11 \ 1 , 1 .• \ -- / / I I ' `( 1 /ri/' ' / r / '''; '/ , ' / / I 1 , I , r , , r i r r , / 1 1 \ \ \ \`: \\ ./. / r , , i / %/'/,' i / /' / \, • / % / / /� ,I r r I 1 1 r 1 1 \1 \ \ \ \\ `� ......'..../ / I % r l i i //// ' I / / : / r r r / , r , ' � / it ```\ ri//1// / , 1 \ / /' / ' / , 1 r 1 r tIl 1 1 ) 1 1 1 , \ , \ \`. , `\-- / %�/� / ' i I \ i// /'/ / 1 , / / ' ill I 1 L`. ` ' I I I / ` 1 1 \ ‘\''':---.-----\ `�- / '/ i_ % //� it / ' ` / i'///i i /' / ' .�\ /'/ , /r/j r / ' /' 1 1 1 1 I , ._ \\ r 1 I I I•II/ % ' i \ \`. '''.'' �'” '' /// / I ./{ /� r� /i r/, ' - 1 1 i i I •l / / % 1 . \ \ �/ / /' /1 r / / /r r _ , r , 1 l l`'i '� \ \ `\ `` ,, r 1- / :'' / `� , ' r 1 r r / .4 I Ii \ 11 , r r` \' \ ' \ `, - __ rI I I I\ \ \ \1 I I ( / / / . . r , , ' / , 1 1 i \/i�,f r i / ' 1:i i l '�\ \ \\''` _`------ 'I / / / \ l \ \ \ \ 1 / r/ ' '// '//./' i 1 1 ��j i, / ( I ii,/ /I / \ r r 1 r 1 / / / . .''l// ' r I /'/i' r I 1 / 1 • \ \ r % •I 11I _ \\``\````� ` \ // %tTT1ii :_____ ' � 4 I II i 111 i - --,• \` � - ,11i - 1 �, , 11 \ \ \ 1\ .... _ \'�� 1 ,r \ - _ \ \ , \ \ \ 1 1 I \ ``,iI 7 r �i\1ii \ \ 1 1 \ \ , „ „ , ...------------------_,„.. ,,„„ \\ 1 , , I ‘ ,- _ ``� \\ _, \, \` \ \,`` `\ \ \ \ \ i i I r ```. \\ ,` ```` ,,1\ - ',/' 41t,— 1 1 1' \\ \\ \ 1 _ \ ` ' • 1 , „ „ . . ..,;., ........---- ---, ...-, , ; , ‘ \ + t , ; \\ ---„, --N. \ \ , \ • \ , \ . .....„------- \ /,/,-, i ' iii, -"Nr \\ „ ,N 1, '„ \ \ r.,ill \\ N \ 1 \�` \• �\ i ' i \ \ � \ � \ \ 1 \\` \ \ \` \` /� ii I 1i 1 1 r1 \ i / \R` \N. \ \_ \ \ `. \ , 1 r r \ '' , r 1 , \`\ ,'`\ ^- _ Y \,` \ \ ,`\ ``------- - ---`---_ „, ''' , \\, ` 11 11' I 1 1 1 1 , ' ► ,``\\'`` • `' _'\ �'. \` ``\ \ 1 1 i 1 1 i 1 I \ \ \ \\` `\\` \\ - //I/ lier, � \ ' I1 111, 1I \ , ��``.\ `' �\\\\ \ 1 \ \ \ /� \``• . ``` j /i _ \ 1 1`• 1_ I 1 l +, 1 \ \\``-_ \ '\' \ \ \ ` 1 \ \ \ \ \ \�- ` 5.2 ACRE PROPOSED-----_ ,;, /1 r .\\ \ 1 i I -t--T---r— \ % \ \\`\\ \,\\I , `` \ , `\ .. -``--- DRAINAGE AREA. - �\` ---,,,,„/,_,:- . I 1 , I r I 1 I , \ 1 , \ ` \ `i `' r I ► r r 1 ; \ \ ' , \\ -:\ , /r 1 r vii ,1r, , �'..1 I r / : ,„ 1 / \ r 1 r ' I \ .\ ` ` CN=60.PEAK10—YR '� ``\. \ /; / ' 1/) / I I I , r ' , , I I \\ i 1 1 1 ' 1 ' '` \ , , \ \ \ _' f` \ /:/. r` {i \ \ /. / 1 ' 1 i l 1, , 1 r r , r r 1 I \` ` RUNOFF = 10.3 CFS -----...„-------Ns. \ \ /%'/ , ;I 1 , 1 ` ► ' 1 , ` I. r I I r I \ , , \ , --_--�` \\ ```\```\ \\'`i!_-' \\ `,\```.:j 1 41141 \O ,` ``._` \\\\ \s‘,\ 1 , ' 1 % 1 \ \ \ • ......----_-_-,---;--• ''•_-.7.f4sS-------,:_-_-_-_-_----Z... •,„ • • . . -,-....-.-.-------‘, \ --- , .....„.....„-., ,/ Alli, Apt it , , i/ 1 1 it 1 ti \I \ \� 1 \`\ I i 1 \ \ \ \ \ , _ ----:;\ \ \,` `` \`�1 `,,.rii T rr r _,♦ \ \ ' i \ jar\ / `r/ ,, / 1 i 1 i l ; i \ ' 1 \ J.- \ \\ \ 1 ‘.., ___-----"..---7 1 ,I, \-71*—S—S.Ss%0170004116:::----' •' s \ \.\\\\\‘\\.\\\‘‘'\\\,\\\\,\\ \‘\.",:—\\::::\----:".-2.2.;—.. -5;;;15--------://,'://''/IliAl A‘ii 1 '''‘‘ \ '•is 4 / // ///:i./ ‘\\ // /1 ///// I/1//'i/1 l''': \• \ // INLET2 CULVERT \` - ` \\\ , / \\\, s\,`` __ • -- 1 1 / / / / 1 , .14 %4, : •./ , / / / / \\• \\ \ _ - '_:�:; �\ 1 \`���� 1.01 ACRE PROPOSED �� \ \ // / •;. 'i / / I 1 1 \\ `\\ •\\ PEAK 10-YR RUNOFF AT------------,-'• '-' - \ , \ DRAINAGE AREA TO �. 1 1 \ �/ / / i / I I( 1 `• \ \ INLET 2 = 11.3 CFS :---- `--- - ' '--; . ` \ \'` _ ��� / / / 1 1 ` •• \ `� <' , _---- .\� \ CULVERT.CN=51. \ / / / / / 1 / \ 1\ \ PEAK 10-YR RUNOFF AT. 11ytip \ 1 1 / \ / / / /,'; I 1 1 / \• \ \ \ \ CULVERT = 1,4 CFS �� S 1, r ', apt / /, / / / 1 r , I 1 `\\ 11 ,\ { '_// -- -�1 '•, \�\ \\ \\ \ •\\ \ '` \ _ o- � 4.87 ACRE PROPOSED / !. /' 1' / ";r \ \,1 : I 1 / I 1 1 \ \ \ `\ ` 1 = j DRAINAGE AREA TO INLET 1ft, / / / ' 1 \ /Y, I'/, I ;l ` 1\l,\ ,`' \ •\ \\ \ \ -• .�\ CN=66.PEAK 10-YR RUNOFF // /, /' ,. 1 ,,,,,,,,,,,\, ,„ / ,;' �i/ _ ` \• \ •\, // AT INLET 1 = 15.5 CFS / \ /%/ / l 1 1; 11;1/ r r I . , , „ 41ti it /.. „ ,, , ,, , , ,, , ,, ,,, , , , A.,„47, i , ,,,,„L , ., , , , , .,.. , - - : I 4/),• \ ‘ .IIIs-• . iliar.e....;:>‹,',' f / // I : , 1 r• / / � � \.'\`.\� 1........,_,,.,;,..,„„.„2.,‘„, \ ,,,,, \ 'lb , // / `ter • • ./ / / \ 1 lit r ` \ ` \ \ \ ;INLET 1 /i \ __ __�_= % .'/'' • \ I --_ . it , r r I f rlr 1/i \ \ \ \ yi - _ _ 1 t / r ) �,/r r , \ , 1 1 1 I 1 _ ,�/ . � I // , , , ``` i t \ \ \ \ \ \ _ ' l t f --_/Z:/ /, i\', , 1 , i ' ! i//ii%' , I' : /'�f i/i 1, ,rlr '! _ _ - \ \ \\ \ �`'- _ ' \\ `i`,` `` / ► . \ ` r / //' ,'%1 ' \\``` STORMWATER: PROPOSED CONDITION SCHEMATIC Existing inadequate drainage along Rio Rd East is causing damge to .///, 1.T.T.T'..C.,..;.:\(-'''‘-:--,--,, ,-- downhill properties, specifically TMP#61 -190. u \ 1 1, 1 l-- -_-- ------ ---_ K, N ', i `� ` \ ` `\ `• `\ \ `\ `\ `\ \` -:: , //' / "i 0I `\ 11, \ , ...- / -'-.. . r \ \ ` ` \ ` \ \ \ \\ \ `_ ,,/ . , ,... 1 1 \ \ \ `♦ c _ 4ru----wu ` ' \ . \ \ \ \ \ \ \ \ \ _ - / ei -'. / 1 \ \ N\ `\ y\\ \ /- -C_ ,• Y\ \ ��_ _-_ _ / '` -- \ -.\-.•1\-'\-.i\„i-.7„./`/.-:..,.-:,_N-..\.-.-,--.k-".'\.,\'.-•'.'\'s.-.,'.\I.\./..•.N.T/.\/.:',.'„..\.„./.,.//i..:\..7 l/,,.'...s....•..1I,.'.'.\..„.,'.,/‘•1//.•',e,‘s./'.'..i •s-_/i-a.-m,,,_-:i .\1tft4A\...N„.\. \‘1,11.1I.I \\1\\\*1 \Liiiiief„....„ ;.,,INLET ' `\\ ` _ REGRADE \ ``,. \ ;. \ �w --z=:,...,-- \'`. ' 1 ' ./i..\.•\•l 4•\'\\ar,1\4,4 t:i\t\A \i !I ' ENTRYWAY , \ \ , - - 1 vJ \ . ;0\1111,*1V11 ' BIO FILTRATION INTEGRATE I,I I I \ t—a.?" / ///,,/_'/,f//„,;,t/:/,/,/////.:/./.(')„/;//,/...„./.-.-.../.„.-..-"..../..1.:..---.-e/„...-...-,"..1'--/..:1-T>..-/--,---:--:----._-.:-.1-:..:_"-:-e_:-:--_7:/.:----/-/-:--'/-------- ------- --- ®A ''� _ INTO LANDSCAPE DESIGN \ . Ii ,y I II I 1I tilliiif/f /,/ / I / \ \ \\\ \ \ \ \ \ \ `„ , • ID 0 ,m); ir.,,,,, , . _ .\,. , '4I N4' 1 , ,-;'/ TMP*64-190 \ \\ \ \ 1 \\\\ \\\\\\\,\ \\ \% _ ., = -_ \, .,,Yr t1 : mlai / Iiiiiiiik--- 1 I II I VrPie/ /,7 , „ .7..N... 'I /. I. "..N.‘ 111111411P144111H ..e. \°4'. -.4911, • � \`` \ ` ` \ i %\ /t \`\` \ `\ • \` \\\` ` \ \ . - • f„_\ \ \ \ ` I , \ 410 ,, ,�\ \ , \ \` \ , \ ` \ ` \ \▪ \ , \ \ \ , `\ , \ \\ \• `\ -� _ iRAI ` \\, \\ , \\\\ \\\N \\`\ \\\\\ \\\\\\\\ \ \ ` \`\ \\ `\ `\ \ \\` _ `\ r ,' MEADOW `� `, \\ , \\ ;\\\ ' �, \ \ .\ _ _ - - i / . 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