20201021-004a: 1112 W. Annie St. SP-2020-0093DS variance packet — original pdf

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ITEM FOR ENVIRONMENTAL COMMISSION AGENDA COMMISSION MEETING DATE: NAME & NUMBER OF PROJECT: October 21, 2020 1112 W. Annie St., SP-2020-0093DS NAME OF APPLICANT OR ORGANIZATION: Mark Zupan LOCATION: 1112 W. Annie Street, Austin, Texas, 78704 COUNCIL DISTRICT: District #9 ENVIRONMENTAL REVIEW STAFF: WATERSHED: REQUEST: STAFF RECOMMENDATION: STAFF CONDITIONS: Hank Marley, Environmental Review Specialist Senior, 512-974-2067, hank.marley@austintexas.gov West Bouldin Creek, Urban, Desired Development Zone Variance request is as follows: Request to vary from LDC 25-8-261 to allow development inside the Critical Water Quality Zone. Staff recommends this variance, having determined the findings of fact have been met.  Restore any damage caused during construction to the City erosion control infrastructure up to the standards shown in the West Bouldin Creek at West Annie Street Stream Restoration Project – GP-2014-0593.WPD.  Provide a planting plan requiring City standard specification 609S – Native Seeding and Planting within the critical water quality zone. Development Services Department Staff Recommendations Concerning Required Findings Project Name: 1112 W. Annie Street; SP-2020-0093DS Ordinance Standard: Watershed Protection Ordinance Variance Request: To allow development inside the Critical Water Quality Zone (LDC 25-8-261). Include an explanation with each applicable finding of fact. A. Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: 1. The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes The site is located in the Bouldin Creek Neighborhood Planning Area and has a single family zoning designation similar to the immediate surrounding areas. The proposed bridge crossing is to gain access to a larger lot located on the other side of West Bouldin Creek. This is the lot where the owner intends to build their home. That lot is 0.5290 acres and the majority of it is outside of the 100 year floodplain and critical water quality zone. The proposed bridge crossing is the only access point that the owner has to the City ROW, as the lot is entirely enclosed within West Bouldin Creek, other single family lots and the train track that runs the entire length of the Western perimeter. By not allowing the proposed bridge the requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; The proposed bridge over West Bouldin Creek is the only access point that the owner has from City ROW to their buildable lot. The proposed bridge has been designed to take the most direct path across the creek while also minimizing, to the maximum extent feasible, disturbance to the critical water quality zone and avoiding disturbance to the critical root zone of tree #002, which is an existing 20” pecan tree that is located on adjacent City property (See Figure 1). Furthermore, the design also avoids the removal of trees #004, 006 and 007, all of which are Pecan species located on the project property (See Figure 1). Moreover, the proposed location of the bridge also adheres to the minimum 5 foot side yard & 25 foot front yard setback requirements in accordance with LDC 25-2-513 & 492 (See Figure 1). Therefore, the variance is not necessitated by the scale, layout, construction method, or other design decision made by the applicant. b) c) Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; The proposed bridge has been designed to span the 100 year floodplain. It has also been designed to remove the least amount of protected sized trees located on site and also avoids disturbance of the critical root zone of the larger 20” pecan tree that is located on adjacent City property. Therefore, staff agrees that the design and location of the proposed bridge is the minimum deviation from code requirement necessary to allow a reasonable use of the property. Does not create a significant probability of harmful environmental consequences. The proposed bridge has been designed to span the 100 year floodplain. During construction there is some expected disturbance to the creek and the City erosion control within the vicinity of the proposed bridge crossing. The developer is required to clean and remove any construction debris from within the creek. They are also required to make repairs and restore the City erosion control infrastructure that may become destabilized during the construction of the bridge. Furthermore, all areas of the critical water quality zone that are located within the limits of construction will require City standard and specification 609S – Native Seeding and Planting. Therefore, the variance does not create a significant probability of harmful environmental consequences. Yes Yes Yes 3. Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes As this proposed bridge has been designed to span the 100 year floodplain there will not be any obstructions within the waterway. Due to the increase in impervious cover being less than 8,000 square feet the project does not require water quality treatment in accordance with City code. However, City standard specification 609S – Native Seeding and Planting is required within the limits of construction. Therefore, development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Staff Determination: Staff determines that the findings of fact have been met. Staff recommends the following conditions:  Restore any damage caused during construction to the City erosion control infrastructure up to the standards shown in the West Bouldin Creek at West Annie Street Stream Restoration Project – GP-2014-0593.WPD. Provide a planting plan requiring City standard specification 609S – Native Seeding and Planting within the critical water quality zone.  Environmental Reviewer (DSD) _____________________________ (Hank Marley) 9/30/2020 Environmental Review Manager (DSD) _____________________________ 9/30/2020 (Mike McDougal) Environmental Officer (WPD) _____________________________ (Chris Herrington) 10/07/2020 Hank Marley Figure 1 CONS U LTING . ENG INEERING. CONSTRUCTION . February 1 7, 2020 City of Austin Planning and Development Review One Texas Center 505 Barton Springs Road Austin, TX 78704 Dear Director, RE: Water Quality Transition Zone Variance Request for 1112 W. Annie Street The site plan is located at 1112 W. Annie Street and consists of a Type 1 driveway and precast bridge to be built for safe access to the SF-3-NP lot. The residential lot is 0.68 acres and the site plan limits of construction are 0.06 acres. The bridge will be the only access available to the lot over West Boulding Creek within the West Boulding Creek Watershed. This site's access is located over the Water Quality Zone and has been recommended by the Environmental Review to submit a site plan (for bridge access only) for a variance to be processed. • Per § 25-8-452 and§ 25-8-482 Water Quality Transition Zone, development is prohibited in a water quality transition zone that lies outside the Edwards Aquifer recharge zone. Therefore, per § 25-8-41 Land Use Commission Variances, the Land Use Commission may grant a variance from a requirement of said code after determining that: o o o the criteria for granting a variance in Subsection (A) are met; the requirement for which a variance is requested prevents a reasonable, economic use of the entire property; and the requirement for which a variance is requested prevents a reasonable, economic use of the entire property We request that an access driveway and bridge over West Bouldin Creek be permitted within the Water Quality Transition Zone and for this variance to be granted. If you have any questions or concerns, please feel free to contact us. Sincerely, Mark Zupan, PE Project Manager i!o.,,,,,,,,,,,,, •11 ~~or 'f. -=-~>t-\··········.f..r .,,, .=i:.,/ * ···1'\JI\ ;/;*:" .... ~ "*Ill ::, ............................... ~ "'-*: ~ .... ~~~.~ .. !: .. ~.~.~~~ .... ~ .: 0: I: ~.,, "· :41:: ~"P·. ~,~··.~ tcrns'i,_~.<#: ,,,-s-.s-/ ......... ·~~(;; .:F It\ ONAL ~ 128994 '''''""''....: 02jt¢020 3815 S. Capital of Texas Highway, Ste. 300, Austin, TX 78704 www.atwell-group.com Firm# 12242 Tel: 512.904.0505 Fax: 512.904.0509 July 10, 2020 ENVIRONMENTAL COMMISSION VARIANCE APPLICATION FORM PROJECT DESCRIPTION Applicant Contact Information Name of Applicant Mark Zupan, PE, Atwell 3815 S Capitol of Texas Hwy, Suite 300, Austin, TX 78739 512-904-0505 mzu~an(@atwell-grou~.com Variance Case Information Street Address City State ZIP Code Work Phone E-Mail Address Case Name Case Number Address or Location Environmental Reviewer Name Environmental Resource Management Reviewer Name Applicable Ordinance 1112 W Annie St SP-2020-0093DS 1112 W Annie St Hank Marley John Clement LDC 25-8-261 Watershed Name West Bouldin Creek Watershed Classification XUrban D Suburban DWater Supply Suburban DWater Supply Rural D Barton Springs Zone City of Austin I Environmental Commission Variance Application Guide July 10, 2020 Edwards Aquifer Recharge Zone D Barton Springs Segment X Not in Edwards Aquifer Zones D Northern Edwards Segment D Yes X No On Site Edwards Aquifer Contributing Zone Distance to Nearest Classified Waterway Water and Waste Water service to be provided by Request No water or wastewater service as part of this application. The variance request is as follows {Cite code references: Existing __ o __ _ o_ _ o_ Proposed - 1198 __ 0.0275 __ _4 __ Please see the attached Engineering and Drainage Report. Impervious cover square footage: acreage: percentage: Provide general description of the property {slope range, elevation range, summary of vegetation I trees, summary of the geology, cwaz, WQTZ, CEFs, floodplain, heritage trees, any other notable or outstanding ch a ra cteristics of the property) City of Austin I Environmental Commission Variance Application Guide July 10, 2020 Clearly indicate in what way the proposed project does not comply with current Code (include maps and exhibits) FINDINGS OF FACT the following findings of fact: Project: Ordinance: The proposed project doesn't comply with code section 25-8-261, 25-8-262 building in the critical water quality zone. See attached drawings. As required in LDC Section 25-8-41, in order to grant a variance the Land Use Commission must make Include an explanation with each applicable finding of fact. A. Land Use Commission variance determinations from Chapter 25-8-41 of the City Code: 1. The requirement will deprive the applicant of a privilege available to owners of similarly situated property with approximately contemporaneous development subject to similar code requirements. Yes I No plain, my client cannot access their property. If we can't build the driveway/bridge in the CWQJ.. and over the flood 2. The variance: a) Is not necessitated by the scale, layout, construction method, or other design decision made by the applicant, unless the design decision provides greater overall environmental protection than is achievable without the variance; Yes I No only access point to gain access to the back half of the lot. There is no other way to provide access to the site. This is the b) Is the minimum deviation from the code requirement necessary to allow a reasonable use of the property; Yes/No Providing access is the only way the property can be used City of Austin I Environmental Commission Variance Application Guide July 10, 2020 c) Does not create a significant probability of harmful environmental consequences. Yes I No in it. We are not altering the channel seeing as we are bridging over it. We are not affecting the floodplain because we are not building 3. Development with the variance will result in water quality that is at least equal to the water quality achievable without the variance. Yes I No Since the lot is zoned SF-3 and it is less than 8,000 sf of impervious cover so water quality is not required. B. Additional Land Use Commission variance determinations for a requirement of Section 25-8-422 (Water Quality Transition Zone), Section 25-8-452 (Water Quality Transition Zone), Article 7, Division 1 (Critical Water Quality Zone Restrictions), or Section 25-8-368 (Restrictions on Development Impacting Lake Austin, Lady Bird Lake, and Lake Walter E. Long): 1. The criteria for granting a variance in Subsection (A) are met; 2. 3. Yes I No Subsection A The site qualifies for the variance and we have met all of the items in The requirement for which a variance is requested prevents a reasonable, economic use of the entire property; Yes/ No We can not access the site without the variance The variance is the minimum deviation from the code requirement necessary to allow a reasonable, economic use of the entire property. Yes/ No Yes it allows us to provide access to the lot. **Variance approval requires all above affirmative findings. City of Austin I Environmental Commission Variance Application Guide July 10, 2020 Exhibits for Commission Variance o Aerial photos of the site o Site photos o Aerial photos of the vicinity o Context Map-A map illustrating the subject property in relation to developments in the vicinity to include nearby major streets and waterways o Topographic Map -A topographic map is recommended if a significant grade change on the subject site exists or if there is a significant difference in grade in relation to adjacent properties. elevations. o For cut/fill variances, a plan sheet showing areas and depth of cut/fill with topographic o Site plan showing existing conditions if development exists currently on the property o Proposed Site Plan- full size electronic or at least legible 11x17 showing proposed development, include tree survey if required as part of site or subdivision plan o Environmental Map -A map that shows pertinent features including Floodplain, CWOZ, WQTZ, CEFs, Setbacks, Recharge Zone, etc. o An Environmental Resource Inventory pursuant to ECM 1.3.0 {if required bvlS-8-121 ) o Applicant's variance request letter City of Austin I Environmental Commission Variance Application Guide 7/10/2020 1112 W Annie St - Google Maps G o gl,e Maps 1112 w Annie St Imagery ©2020 CAPCOG, CNES I Airbus, Maxar Technologies, U.S. Geological Survey, Map data ©2020 50 ft 1112 W Annie St Austin, TX 78704 • ® ®@@ Nearby Send to your phone Share Save Directions 762P+3J Austin, Texas • • • • • Photos https://www.google.com/maps/place/1112+W+Annie+St, +Austin,+ TX+ 78704/@30.2503009,-97. 7634522,203m/data=!3m 1!1 e3!4m5!3m4!1 s0x8644b4.. 1 /2 SITE PLAN 1112 W. ANNIE STREET AUSTIN, TX 78704 SUBMITTAL DATE: FEBRUARY 28, 2020 SHEET NUMBER SHEET TITLE 1 COVER SHEET SURVEY GENERAL NOTES EXISTING CONDITIONS & DEMOLITION PLAN EROSION AND SEDIMENTATION CONTROL EROSION & TREE PROTECTION DETAILS SITE PLAN & DIMENSIONAL CONTROL GRADING PLAN SITE DETAILS 10 EXISTING & PROPOSED DRAINAGE AREA MAP .... ;1- // ~~,,. ,.J~/ ~ , t I f UTILITIES WATER & WASTEWATER AUSTIN WAlER UTILITY AVMIEl'LAZA,IUITE . . W!AIT1111t111111!1!1' Mmnl,TEIAll71o1M CGITACT:ALFllEDOTO -E,tta.t?J.- ONE.cALL UTILITY LOCATING SERVICE COll'TllAGTilllTDCALL~lll!IH ll lN•ll CONSULTANTS/CONTRACTORS ATWELL,LLC _ .. _ ...... ___ _ CML ENGINEER lRl-lECH&l~GCQMPNf'f,LP. _ ____ ........ 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ANN IE STREET SURVEY AUSTIN, TX 78704 ® Dc\•clopmcnt Scn·iccs Dcpart m CriT Land Sta tus Determin a tion Legal Traci Plaiti ng E xce ption Ccrtificalio n Dcccmbc r22,20Ui Th e Dcvclopmcm Services Dcpaniiient has detci'mined tha11hc propcny described bclowandasshown ontheanachedta x ma P: Is a LEGAL TRA CT consisting of Tract I: all or that cutai n tract or parce l oriand out of lhe Isaac D~ker Leag ue in the Cily of Austi&. Tra•·is Co unty, T o:as, Being a portion of Lot 7, Block 3, Norlh Exte nsion to Bouldin Addition. a Suhdi•·lshrn in the City of l\ ustin , Tra1·is County,. Tern as reCordcd in Plat n ook 2. Page 135 ufth e Plat reeords ofTra•·is County, Texas. Tract II : All of1h11t certai n tract ur parcelo f /and outofth e lsaacOft: kerleagu e intheCityof Austin . T ra\'isCo unty, Texas, bcingapo rtionoflhata:rt11inunplatted portion of Block J. No rth Extension ID nouldin Addition. Tract 111 : Bei ng Two (2) 1ractsofland,eachofthc saidTwo (2)tracts ofland being ou t o f a nd apartoft hatcertainaltey th11ttni.-ersesBlock3,North Ex tcnsion to Bouldin Addition. The Inlet of land hereinafter desc ribed as number One contalning381 squ11re fedoflandandthe tractof landhereinai'tcr describcdas numberTwocon lain in g399s11uarefoetof hrnd;eachor thc saidTwo( 2)t ractsofland•·acatedhein goutofthatcerlainal ley th11ttrunrsess11 id81ock 3. Tra ct IV:Bei ni: 1,591 SquarcfcetoQand, sa me heingoutofandapar10rth11t ce rtainulley th a tlra•·erses lllock J, North Extensl,o n to Uou ldin Addition (Va cat ed ), cr~ted prior to Mar 14, 1946 l_GrandfaiherDa1e )asevidcncedbydced rccordedinVol umel Page 135 of the Travis County Deed Records on Jan 20. 19{1(1 be ing the' ,,amcpropertyascurrentlydescribedindeedrccorded in Document #2000024480 of the Tra.-is County Deed Records on Feh 18, 2000 and is cligiblciorccciveutility ser,.kc. Ad.QWonal NQtcs/Con<litions: Tr:ict I: Lot 7. Orriiiiial Plat Volume-2. Page 135 da!c<l l/2011900- Street Deed (ROWtakiilgfVolu me 3720. P:igc 1179 d:l!cd Sll91l969. Trnct II : Volume 407. Page 227 'dated 10/03/1927, 'Trnct fl[ & JV: Vaca!!d Alley. Volume 10-162. Page.645 dated lOf.!211987 and Volume 10677. 1Page245dated.OSI09/1988 Th is dctCnniliation· of the status of the propcny i ~ bai;cd on 1he application of Chapter 212. /\l unicipa l Regulation of Subdivision and Property Dc•·clopmcnt. Tnas l..Qcal Go'"crnmcm Code; and the City of Austin L:ind Dc,·elopmcnt C~. Chapler25---1. Subdivision.Recognitionhcrcby9ocsnotimplyapprovatofilny otherOOftionof thefo:.ityC9'1eor any 'othcrrcgulation. I ~lapAUachmtnt GENERAL CONSTRUCTION NOTES: ORDINANCE REQU IREMENTS FIRE DEPARTMENT ALLRESf'Ol<SIBlUTYFOOTHEAOEOUO.CYOl'TIESEf'l.ANSRCM.OJNSWIT>lTHE ENGINEERWHO .... EPAAEDT>IE ... •NREVlEWlNGTIESEf'l.ANS, THECITYOFAUSTIN .. 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T A LETTEROFCONCURf!ENCETOTiiE OE'>'ELOPME><TSERl/ICESOEPAA:TME><TliOICATING THAT T><EREOU•RED lANOSCAPINGISCWPLETE.i.NO•NSUBSTANTIALCONFORMITYWITHTHE APPRO\IEDPl.ANSAFTERRECE MNGT .. SLETTER,A FINALINSPECTIONWILL8E SCHEOIJl.EOBYTHEAPPROPRIATECITYINSPECTOR 12. AFTER A Fl"""- INSPECTIONIWl8EENCONDIJCTEDBYTHECITYINSPECTORAND WITHAPPROVALFROMTHECITY INSPECTOR_REMOVET><ETEMPORARYEROSK>N N<l>SEO..OE><TATIONCONTROLSANDCOMPLETENNNECESSARYFINAL REVEGETATIONRESULTI NG FRO .. REt.IOVAL OFTiiECDNrnOLS . CONDIJCTANY WJNTENANCEANOREH>.BIU TATIONOl'THEWATEROUALITYPONOSORCONTROLS AMERICANS WITH DISABILITIES ACT: THECITYOl' AUSTINHASREVIEWEOTHISf'l.ANFORCOMf>lWICEWITH CITY OE'>'ELOPME><TREGUl.ATIONSONLY. THE APPLICANT,PROPERTYDWNffi.AND OCCUPANTOl'THE PRE .. ISESAAERESPON SIBlE FORDETER .. ININGWHETHERT>lEP\.AN COMP\. IESWITHAUOTHERLAWS,REGUlATK>NS. m DRESffilcTIONSWHICHMAYBE N'PllCABLETOT>lE"'lOPERTYN<DITSUSE ® ...,...,..,._..,.,...,, .. __ ..... _,,_,. .. ,,,~ .. - Know what'• below. Call beror• youd!g. "'"'""'""" Ml<,.._, ..._..,,, .. ,,.. ,...,"""'"""'°" l OCA ""°' Cl' >UE~ S""° ..-unu . .,..,.,_...__."'""" ··-~~""'""""'- """ """'" rn ""'-'"'"'....,.__. L.OCA ... ..., .... ..,.,.. ..,,_ALJ. coruw:; ' ""' ' '"-~ fO<-""Cl\.¥ ~~:c :t I ~I ~i <c1 fil b z -' w ffi z "' CITY APPROVAL SITE PLAN RELEASE =~:~:=:::l:~y .. ~Sl_OO_OO ____ _ APPROVED!lYCllYCOUNCllON _____ _ Unders..ction _!!_?_ofCM plO< ~OI ThoAIJ•bnCilyCodo Dn<:tot-. Oe!>a"""'ntof Plarvw19andD<"olojl<Mn! OATEOFRELEASE; ____ _ __ _ ~ DR CJM !IC.~- AA CO<f6Cli<>n1 ~' •~CT<~OF 10 t -"!""'~ ..... SCM.E:l'•H' TREE TABLE Tr.;4;ag I I 21 l :~o;~:o~TWIN) ..... m rn 1 - - 21' LIVE Oi'IK (lTl'IN) 108 9' l 211'PECNl{TWINJ 107 103 102 101 100 025 022 019 018 nu 012 011 010 009 ooe 007 ooe 00.S 004 003 Do2 Doi 10'HACMBERllY 10'HACMllERllY Hi' PECAN 10' ~ECAN 10'HACMllERRY 10'HACMllERllY 20'PECAN 11' ~ECAN 1D'PECAN 2D'PECAN 11 PECAN II' PECAN 11 " ELM 18'PECAN HI' ~ECNI 14'PECAN 11'PECAN 23'PECNl{1WINJ 12 l22' PECAN {TWIN) llAGl1AILIL1¥,•ID11.3lj Latl SITT: TllPO::l\lf'HY ~fRO~!.lLSTAA~ICDflE0 7/l .l/2!1 1 1 ~· , - ~_,, ,~,,,,~~~~ NOTES LEGEND '''""""'"··¥····~""''"''""' -:..3~ .J,, ..J ~ wq h ~m ~I ~~i ! 0: • -~ ~ 0 ~ a: ti w z ::! ~ ~ ~ z ti '1 .. ~~ ,_ .. Ciz 8~ .,5 !!!:& ~~ ~ i CITY APPROVAL FILENLMBER: CASEMANAGER: EXPIRATION DATE APPLICATION DATE :::!~~~::i::~-o,-,---- APPROVEDBYCITYCOUNCILON: _____ _ '-"-S-llillla.ptor~Oln.-nClyCad• /I 1/I DATEOFRELEA!iiE: ____ Zall~: __ _ Dl-.Dl~d-~-Dlwl""- i""'iiil""i IR C.al !!CH. M I/ / =~ =~i 3HEl!TNloF10 R E F F U D B R A Z A N H S I O O R 1 0 0' E W W W A STE W ATE R V O L. 11900 P G 840 E A S E M E N T R.P.R.T.C.TX. W W 011 010 W W W W 25' - 0" SETBACK SF LOC LOC SF LOC P T 008 T P 009 T P SILT FENCE END 007 T P WITH CAP STAMPED "SEELIG" W W W W TP TP TP T P WITH CAP STAMPED "SEELIG" T P W W T P T P P T 19.86' W W P T SF LOC 005 T P TP N 70°35'43" W 42.17' F S L O C W W W L W L W L W W ODPLAIN C.W.Q.Z. W W COA FULLY DEVELOPED FLO FEMA 100 YEAR FLO L W W W W W OD PLAIN W L W L W W L O C F S 3-FT WIDE COFFER DAM SEVERE SERVICE ROCK BERM ENCAPSULATED IN IMPERMEABLE GEOMEMBRANE. W W W W L O C F S MH 118977 ON-SITE SEDIMENT LADEN WATER SHALL BE PUMPED AND TREATED USING DEWATERING FILTER BAG W W L O C F S K C A B T E 5' - 0" S 2' 1.3 9 ~ F S 10-FT WIDE BULL ROCK BERM USED FOR ACCESS. L O C 8" E 3'0 8°0 N 2 L O C F S L O C ℄ 0) 2 0 0-0 9 9 G (S-1 4" F W W 2 W L W W W L W L W W LOT 8 STAGING AND SPOILS AREA F S TP L O C TP S E 25' - 0" T B A C K S F S F W W NAIL SET AT BASE OF TREE INLET PROTECTION T P T P 001 F S F S P T L O C P T LOT 7 E RIV E D T E R C N O C F 6 S 0 3 W L W W W L F H 1 6 4 8 3 1 W L WL W L T P L O C 6 " W L ( N O T S H O W N O N S V C I N T 1 8 5 8 3 ) A W U L O C W W W L WL W W W W W W I E G D R B L E E T S & K C E D E T E R C N O C F S 2 9 8 SF T P 003 F S T P T P S F P T 004 5' - 0" S 2' 4.2 C O 9 L 8" W ~ 3'0 8°0 002 S 2 C O L P T P T C O L TP T P F S C O L T P F S C O L F S C O L CONCRETE WASHOUT SILT FENCE START LOT 6 SQUARE HEAD BOLT FOUND LOC STABILIZED CONSTRUCTION ENTRANCE M H 1 1 8 9 8 7 W W W W W W W W W W W W W W W L C.W.Q.Z. W L M H 2 7 3 8 2 W W W W W L AWU WTR INT: 18583 AWU WW PROF: A180 W. ANNIE STREET (R.O.W. VARIES) WL WW W WL WL WL W L L W W 8" SDR-26 PVC (S-2007-0004) 4" PVC (W322.1-701-95) WL WL WL WL WW I Z E N T R A M S O L R A C M A 9 1 : 6 0 2 0 2 / 5 1 / \ I I . \ - 0 1 G W D C S E E N N A N O T C U R T S N O C T H S N G S E D E N N A 2 1 1 1 X T A N A B R U E T A V R P \ I \ I \ I \ : T THE HATCHED AREA IN THE CWQZ REQUIRES NATIVE GRASSLAND SEEDING AND PLANTING PER CITY OF AUSTIN STANDARD SPECIFICATION 609S.6 INCLUDING TOPSOIL AND SEED BED PREPARATION, TEMPORARY IRRIGATION AND WEED MAINTENANCE. 025 NOTES LIMITS OF CONSTRUCTION: 0.146 AC 1. 2. 3. 5. THE ENVIRONMENTAL INSPECTOR HAS THE AUTHORITY TO ADD AND/OR MODIFY EROSION/SEDIMENTATION CONTROL ON SITE TO KEEP PROJECT IN-COMPLIANCE WITH THE CITY OF AUSTIN RULES AND REGULATIONS. THE CONTRACTOR SHALL PROVIDE DUST CONTROL MEASURES DURING ALL SITE CONSTRUCTION SUCH AS IRRIGATION TRUCKS AND MULCHING CONSISTENT WITH ECM 1.4.5(D) OR AS DIRECTED BY THE ENVIRONMENTAL INSPECTOR. 4. SILT FENCE TYPE AND INSTALLATION SHALL COMPLY WITH ECM 1.4.2(G). THE CONTRACTOR SHALL SUBMIT A DE-WATERING PLAN WHICH MAY INCLUDE A TEMPORARY DIVERSION CHANNEL, DIVERSION PIPE, PUMPS, COFFER DAM, OR OTHER APPROVED METHODS AND SHALL OBTAIN DE-WATERING PLAN APPROVAL PRIOR TO CONSTRUCTION. SANDBAGS, EARTHEN DIKES OR OTHER ERODIBLE MATERIALS ARE NOT ACCEPTABLE. THE CONTRACTOR SHALL MAINTAIN DE-WATERING SYSTEM AS NECESSARY TO ENSURE PROPER PERFORMANCE. IF THE DE-WATERING SYSTEM IS NOT PERFORMING, THE CONTRACTOR MUST FOLLOW THE ENVIRONMENTAL INSPECTOR'S DIRECTIONS TO ENSURE ADEQUATE SYSTEM PERFORMANCE. 6. ALL REVEGETATION SHALL CONFORM TO CITY OF AUSTIN SPECIFICATIONS. 7. CITY OF AUSTIN ENVIRONMENTAL CRITERIA MANUAL, SECTION 3.5.4 TREE AND NATURAL PRESERVATION: a. PRIOR TO EXCAVATION WITHIN TREE DRIPLINES OR THE REMOVAL OF TREES ADJACENT TO OTHER TREES THAT ARE TO REMAIN, MAKE A CLEAN CUT BETWEEN THE DISTURBED AND UNDISTURBED ROOT ZONES WITH A ROCK SAW OR SIMILAR EQUIPMENT TO MINIMIZE ROOT DAMAGE. b. IN CRITICAL ROOT ZONE AREAS THAT CANNOT BE PROTECTED DURING CONSTRUCTION WITH FENCING AND WHERE HEAVY VEHICULAR TRAFFIC IS ANTICIPATED, COVER THOSE AREAS WITH FOUR (4) INCHES OF ORGANIC MULCH OR GRAVEL TO MINIMIZE SOIL COMPACTION. c. PERFORM ALL GRADING WITHIN CRITICAL ROOT ZONE AREAS BY HAND OR WITH SMALL EQUIPMENT TO MINIMIZE ROOT DAMAGE. d. WATER ALL TREES MOST HEAVILY IMPACTED BY CONSTRUCTION ACTIVITIES DEEPLY ONCE A WEEK DURING PERIODS OF HOT, DRY WEATHER. SPRAY TREE CROWNS WITH WATER PERIODICALLY TO REDUCE DUST ACCUMULATION ON THE LEAVES. e. WHEN INSTALLING CONCRETE ADJACENT TO THE ROOT ZONE OF A TREE, USE A PLASTIC VAPOR BARRIER BEHIND THE CONCRETE TO PROHIBIT LEACHING OF LIME INTO THE SOIL. 8. IF NO CONSTRUCTION IS SCHEDULED IN A DISTURBED AREA FOR MORE THAN 14 DAYS, THE DISTURBED AREA MUST BE STABILIZED BY REVEGETATION, MULCH, TARP OR REVEGETATION MATTING. 9. ALL CURB INLETS SHALL HAVE TYPE II INLET PROTECTION WHICH SHALL REMAIN IN PLACE UNTIL THE COMPLETION OF ALL CONSTRUCTION AND REVEGETATION ACTIVITIES. 10. A PRECONSTRUCTION MEETING WITH THE ENVIROMENTAL INSPECTOR IS REQUIRED PRIOR TO ANY SITE DISTURBANCE. THIS DOCUMENT IS RELEASED FOR THE PURPOSE OF INTERIM REVIEW UNDER THE AUTHORITY OF MARK T. ZUPAN #128994 ON THE DATE SHOWN ON THE DATE STAMP. IT IS NOT TO BE USED FOR CONSTRUCTION, BIDDING, OR PERMIT PURPOSES. Know what's below. Call before you dig. THE LOCATIONS OF EXISTING UNDERGROUND UTILITIES ARE SHOWN IN AN APPROXIMATE WAY ONLY AND HAVE NOT BEEN INDEPENDENTLY VERIFIED BY THE OWNER OR ITS REPRESENTATIVE. THE CONTRACTOR SHALL DETERMINE THE EXACT LOCATION OF ALL EXISTING UTILITIES BEFORE COMMENCING WORK, AND AGREES TO BE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES WHICH MIGHT BE OCCASIONED BY THE CONTRACTOR'S FAILURE TO EXACTLY LOCATE AND PRESERVE ANY AND ALL UNDERGROUND UTILITIES. NOTICE: CONSTRUCTION SITE SAFETY IS THE SOLE RESPONSIBILITY OF THE CONTRACTOR; NEITHER THE OWNER NOR THE ENGINEER SHALL BE EXPECTED TO ASSUME ANY RESPONSIBILITY FOR SAFETY OF THE WORK, OF PERSONS ENGAGED IN THE WORK, OF ANY NEARBY STRUCTURES, OR OF ANY OTHER PERSONS. COPYRIGHT C 2019 ATWELL LLC NO REPRODUCTION SHALL BE MADE WITHOUT THE PRIOR WRITTEN CONTENT OF ATWELL LLC 0 10' 20' 40' SCALE: 1" = 20' 8' 0.6 2 2 ABANDONED ALLEY W W W W W W COA FULLY DEVELOPED FLOODPLAIN C . W . Q . Z . 11. “SPECIAL CONSTRUCTION TECHNIQUES ECM 3.5.4(D) PRIOR TO EXCAVATION WITHIN TREE DRIPLINES OR THE REMOVAL OF TREES ADJACENT TO OTHER TREES THAT ARE TO REMAIN, MAKE A CLEAN CUT BETWEEN THE DISTURBED AND UNDISTURBED ROOT ZONES WITH A ROCK SAW OR SIMILAR EQUIPMENT TO MINIMIZE ROOT DAMAGE. CRITICAL ROOT ZONE AREAS THAT CANNOT BE PROTECTED DURING CONSTRUCTION WITH FENCING AND WHERE HEAVY VEHICULAR TRAFFIC IS ANTICIPATED, COVER THOSE AREAS WITH A MINIMUM OF 12 INCHES OF ORGANIC MULCH TO MINIMIZE SOIL COMPACTION. IN AREAS WITH HIGH SOIL PLASTICITY GEOTEXTILE FABRIC, PER STANDARD SPECIFICATION 620S, SHOULD BE PLACED UNDER THE MULCH TO PREVENT EXCESSIVE MIXING OF THE SOIL AND MULCH. ADDITIONALLY, MATERIAL SUCH AS PLYWOOD AND METAL SHEETS, COULD BE REQUIRED BY THE CITY ARBORIST TO MINIMIZE ROOT IMPACTS FROM HEAVY EQUIPMENT. ONCE THE PROJECT IS COMPLETED, ALL MATERIALS SHOULD BE REMOVED, AND THE MULCH SHOULD BE REDUCED TO A DEPTH OF 3 INCHES. PERFORM ALL GRADING WITHIN CRITICAL ROOT ZONE AREAS BY HAND OR WITH SMALL EQUIPMENT TO MINIMIZE ROOT DAMAGE. WATER ALL TREES MOST HEAVILY IMPACTED BY CONSTRUCTION ACTIVITIES DEEPLY ONCE A WEEK DURING PERIODS OF HOT, DRY WEATHER. SPRAY TREE CROWNS WITH WATER PERIODICALLY TO REDUCE DUST ACCUMULATION ON THE LEAVES. WHEN INSTALLING CONCRETE ADJACENT TO THE ROOT ZONE OF A TREE, USE A PLASTIC VAPOR BARRIER BEHIND THE CONCRETE TO PROHIBIT LEACHING OF LIME INTO THE SOIL.” 12. REFER TO SHEETS 12-14 FOR RESTORATION PLAN. LEGEND FEMA 100 YEAR FLOOD PLAIN C O L TP 006 F S P T C O L LOC TP SF TP TP SF C O L MH 118979 W W F C S O L W W 25' - 0" SETBACK 6" CONC (90-0020) N 70°35'43" W 40.01' HATCHED AREA LOC IN CWQZ. C O F S L 3-FT WIDE COFFER DAM SEVERE SERVICE ROCK BERM ENCAPSULATED IN IMPERMEABLE GEOMEMBRANE. W W W W C O L F S K C A B T E C O L F S CONTRACTOR SHALL REMOVE ALL THE BULLROCK IN THE CREEK, ASSOCIATED WITH THE TEMPORARY BRIDGE AND ROCK BERM COFFER DAMS, AFTER THE PERMANENT BRIDGE IS CONSTRUCTED. BLOCK 3 NORTH EXTENSION TO BOULDIN ADDITION BOOK 2, PG. 135 P.R.T.C.TX. 1 0 0 ' E R O S I O N H A Z A R D B U F F E R LOT 5 LOT 4 TREE LEGEND October 15, 2020 CITY APPROVAL SITE PLAN RELEASE FILE NUMBER: _________________ EXPIRATION DATE: ___________ Sheet Of 13 5 CASE MANAGER: _________________ APPLICATION DATE: ___________ APPROVED ADMINISTRATIVELY ON: _____________________________ APPROVED BY PLANNING COMMISSION ON: _______________________ APPROVED BY CITY COUNCIL ON: _____________________________ Under Section 112 of Chapter 25-5 Of The Austin City Code ____________________________________________________________________ Director, Department of Planning and Development DATE OF RELEASE: __________________ Zoning: ______________ Rev 1 ____________________ Correction 1 _________________________ Rev 2 ____________________ Correction 2 _________________________ Rev 3 ____________________ Correction 3 _________________________ REVISIONS SCALE SCALE 0 DR. CJM CH. AA P.M. MZ BOOK -- JOB 19002268 SHEET NO. 5 __ OF 13 . I - G W D C S E E N N A E L F D A C I : COA CASE NO: SP-2020-0093DS 0 0 3 E T U S I , I Y A W H G H S A X E T F O L A T P A C I . S 5 1 8 3 4 0 7 8 7 X T , I N T S U A 9 0 5 0 - 4 0 9 - 2 1 5 : F / 5 0 5 0 - 4 0 9 - 2 1 5 : O 2 4 2 2 1 . o N E P B T 4 0 7 8 7 X T , I N T S U A I I N O T A T N E M D E S D N A N O S O R E I L O R T N O C T E E R T S E N N A I . W 2 1 1 1 X T A N A B R U T N E L C I DATE THE ESC SHEET AND RESTORATION PLAN MUST BE USED IN CONJUNCTION FOR THE INSTALLATION OF THE TEMPORARY ROCK BERMS AND THE CONSTRUCTION OF THE PERMANENT BRIDGE. WL WL W W WL W W 48" CSC (W-86-0016) WL WL WL 10/15/2020II I )j !• Jii I I • 11 I! I ''I ·r 1111 i I~ I 'i u. " 'II' 1'1 I . . !' I t1 ·~ r1• 11· j ti 11 11 ~ CUE~T URBAN A TX i--~~~~~~-1 1112W.ANNIE STREET EROSION & TREE PROTECTION DETAILS AUSTIN, TX 78704 ,:,'<'<«,~ , , , .~~</) , , ~.p; _,, &'o~ , , -~«-~o , , """ , ,' l!Wr'tc-.:ip # ~;~ .!Q '"'iC/ // IVttvc.- Sr:-3 009 TI E TO RESID E ~HI A L DRIVEWAY /006 .007 ,,' , , ,' L.or6 SQlJ-11~ IJol. 7" ~o~Z;:.D , •,.,.,.,.,.,.,.,. • ~~ ' ~01'\' • f_ s· ~~wss1131 \64113\ ~~ ~ \~1~1\ ~ .$° ___ ,,,m l , I , PROP. TYP E I DRM:WAY '\\ . ,' ~9'' --'~"- o~ / ' \: '+ ::::~ W, AN 11 I£ . vv. llA - '!/'J • . 7f1<>:, ' !ii'~",/ { ~ .A~ rn.o ,A, e•so · ""· '11-<epvc.f.8-<oa,_"' ~"' , "' ~... 4"Pvc~2<~"' , , , ·~ ·1-?01.9/h"'- ~ .., "' \ .. ' , , srRErr RI£ S) ""'~ ~ ... ~ ... I°' ..... ~ ... ~,,,_ , "' / (n~ '"°""" ""'"° '"""'"'"'" . -~----~---~-~---- ~ ~ PR<FOSEil t:all!>.JOl "' ____ , ----.J ~ SITE TABLE ~ AC SQ. FT. TOTAL SITE 0.68 29, 415 .52 IMPERVIOUS ~ 0.03 1.219.07 CITY APPROVAL SITE PLAN RELEASE CASE MANAGER: :::!~~~::i::~-o,-,---- APPRO\IEDBYC1TYcouNc1LON: _____ _ '-"-S-llillla.ptor~Oln.-nClyCod• =~==========~~ ~ NzOF10 t ---. .. ,.. . NOTES 1. .11Lm&j• e»1&-1CTIEFM:EDFCINUILBSOTHEllWBE9'llCIFlm lllLEX!EltoRUGt!JJIGM.LIEFUU.OUT-0FFllNlFW.Y91EUlEDIN 2. C!M'UNICEWITH-E2.I MOWLLIEIEVIEWEDlllRKl l LLDINB PUlllEVIEll.Mf'fCIWlilEDR8l.ll6Tll\ITICfOF~TRXl\IR$ 8 fW.Ll'E ~TOTIEmlECTOOFCIRlff'ROVAl.tlAIXXlRIWICEWITll!ElTICtj l.!ICllDllNllFIJl.llOUD~OOU£CTDl.'llll..CWllOO/lllEH&SH.llLIE THEIMNE A!l,DRCIFIQIW.QIW.nYTO,PIWICIPALllUIWNiMAlelALS. ""llOOE!llll S Ll'.~llll,AIW'l"JlllJl'Ursm,PllllJCMXDllllDllATOl!OR "- AlllElllTEINEl'IU'OEIDNllTE. I. COlll~TaJIYllNllNl)I Aj .llLEXIEltoRUOOJJIUM.LIEIUllJEIJDR5CIEWECFllCllTIEVIEWOF .lllJACENTIEllllENIW_PID'EHTY.[IECll»j2&/l-1mq ll).llLDU!AllBll!MOJIW-Bm_YPLMmRe'l.llEl8lB'TMU'll WIJ.IELOCATEDATA .. N:-OF'TYIENIYC311t,.,.FIUIAl'llC' Bm' LmEODR?alEDAllll<liDRll:lMllESTlllCIM;.(IECIDl:z&.il.1CJ171. C):~~~~~~~~====~I) 0) 11E IOSELEYELOFMEUioNCM-EOJIPIDIT . . "-NOTElCO=ECl'OIEAAT THCPIO'elll'UNEAllJACBITTOlellB(TW.!all.(liECOON»Z-11111]. TDA-C.01WB_YE(12),Wlll_R~llrnnllfCIDID-2-ID171- I. WITH.WLJCMl.ECl!YIEIU.ATlONIONLY."""'°""'-ITOTlmR(! _ .. , IVIALOfUBEPLHlllYllECITYOfMJITIMINlllCATlllOONl'LWC:E _,...,._ ltnTTIESMAVIE!mQJlllEDPl!l;l~Tl;lllEITMTOfCOllSTll.JCTlQll.llE N'l'l.JCNITl5~111..EFCl!.DETEIW--TA1llll110NAl..Wf'OOVALSMAY 1. CID-BIWIM'l'ORVfDRllEllllLT~ILVOO!l ' LUlllMO~EIE I OONl'l.WC:El'llllillEIOlllBUN.NIOllU.11-l'NllLYIE!MlL~ !. SIJEPLAN Rllfll$E A)AU.M'l'O\'E:r.'ENISSHAU.BEW.tlEINACCORDN'llWlntlKR~D SlllO l'LOJ< AN YAllllll o:'.: NAl.Hf>f!C\i[o.IE;N JSWU.REOOlRESIT EF'LA~ REVISrJN<ll'CORRF.CTION A 'IO A ""RO'JALCIF TM E~VWJPMEN T f;E R '.llCe.> ~ ] ADOITICtW.B.£(:'11\:CEASE\/EtlTSMAYSEREC(llREDATA LA""EROATE ----- TREE LEGEND 0-- 0 1:~ '- ./ SL.oJ @ LEGEND ~ ~~ .... 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DRIVEWAYEDGESHAll.BESMOOnt.YTIWISITIONEDINTOTl£SllEWM.KBEGNllNG ATTHERADl.ISPCur£. 2.~..C:,.~'-FPOO~~~~~V~DGUTTEll TO 1~~~==-~~~=:::WASREMCNED, 4.Al.L~AVSMUSTBECONSTRUCTEDWITHWTHESTREETFRONTAGEOFTHE SUSJECTPROPERTYASOETEINNEDBYEXTENDIHGTlESllEf'RCftRTYl..tlESTO 5.DRIVEWAVSSWUNOTEXCUD70'JoOFAlO"IS' ST!!EETFRONTAGE. 8.TVPEIDRIVEWAYSARETOBELOCATEOHOQ.OSEflTOTlECORIEROFtllER ~~.WAVlHNll!IO'll.OFPARCB.FRONTAGEOR15METERS(50FEET); 7.DRIVEWAVSSHALLNOTBEcalSTRUCTEDWITHINllECl.RBRET\J!NOFASTREET "'"''"- ..... """""""" 8.SINGLEFNll..VLOTSUMnEDTOOl£DRl'IEWAYEXCEPTfORAl'PftO'JEOSEMICR:l.lAR 9=~~~~g:ge~rr~~lM)fOROOPLfXESAND 10. WflintEPROPERTVCTttNERRElilAliSRESPONSlll.EFORGJ!ADEBREAKS'MTHIN PRIVATEPROPERTY. lHE FRE DEPARTMENTSHOUlDBEca&l.TEOWHEREllE ORIVEWAYISESSENTIALTO EMERGB«::YVEHICLEACCESSN6J"'G71SGREATEfl lHAN15". "G1 " PUIS'D"SHCUDNOTEXCEED15". 11 . SE£TRANSf'MTATION~SECTION5FOROT!ER~AYR£0tlf!EMENTS. 12ooLISE~~~ .. : : . r .=· ORO"DERAPPR<PIEDW..TERIAL.FORCl.RB 11TlESIDEWALK.REGAROl.ESSDFITSLOCATIONWITHRESPE<:TT01lECUR80R PROPERTYLINE,SHAl.lBECONIECTEDTOllEDRl'IEWAYAT nESELOCATIONS. 14. PUCENIEXPANSIDNJDHTOOWNllECENTERDFAl.LORIYEWA\'a 15.WATERaETERBOXESAMlWASTEWATERCl.ENIWISAREPROHBrreDFROMBEllG LOCATEDINOAIYEWAVAREAS. {® Know wtt1t"• below. Call beror• youd!g. ':7:-3 .::::::t:: _,-yf' C<V<'fl<' '"' '"""L.l. LLO :ti ~I !(i CITY OF AUSTIN DEPARlMENTOFPUBUCWCl!KS RECORD COPY SIGNED BY SAM /INGOOR/ TYPE I DRIVEWAY 1 &2 FAMILYRESIDENTIAL USEONL" n£AAQl1KT.eoNEBIASSIMES RESP(N$1111JTYFQl.N'PRllF'llATEU$E IOFTHISSlNG\111. ADOPTED CITY OF AUSTIN DEPARlMENTOFPl.llUCWCl!KS RECORD COPY SIGNED BY SAM /INGOOR/ TYPE I DRIVEWAY 1 & 2 FAMILY RESIDENTIAL USEONL" ADOPTED M-~ i!ESP(N$1111JTYFQl.N'PRllF'llATEU$E IOFTHISSlNG\111. 433$-1 CITY OF AUSTIN DEPARlMENTOFPl.llUCWCl!KS RECORD COPY SIGNED BY SAM /INGOOR/ n£AAQl1KT.eoNEBIASSIMES i!ESP(N$1111JTYFQl.N'PRllF'llATEU$E IOFTHISSlNG\111. ADOPTED TYPE I DRIVEWAY 1 &2 FAMILY RESIDENTIAL USEONL" DEP~~~~~ T RECORDCOPYS/GNED BYSAM/INGOOR/ c1&2 FAM~J>o'=~sEONLYl 1M-~ $- RESPOC$1111JTYFQl.N'PR(JMO.fEUSE _....,.._. OFTHISSlNG\111. 433 1 llYl.IKl9 ADOPTED EXIST ING -i' g8~~E~ [- f- FA------3 \J B l I :z - EXISTING g8~~E~ A -"'"·~ ·· ~ A pf:~W~¥-..... ~ PROPOSED RAMP OR DRIVEWAY. SEE NO TE 1. EXISTING PAVEMENT STRUCTURE NOTES: 1. SEE RAMP STANDARDS 4J2S-5. 4J2S-5A ANO 5J2S-5B OR DRIVEWAY STANDARDS 4JJS-1,4JJS-1A ANO 4JJS-2 2. THIS METHOD CANNOT BE USED IF THE EXIST ING CURB AND GUTTER ARE CRACKEO REMDV>l OF THE ENTIRE CURB AND GUTTER IS REQUIRED IN THOSE CASES. iSEE STANDARDS 4 J2S AND 4JJS SERIES.l J. CURB CUTS SHOULO NOT EXCEED 9 m (JQ') FROM WING TIPS. 4 . CURB CUTS MAY ONLY BE USED WITH TYPE 1, FLN'IEO DRIVEWAYS, SEE STANDARD 4JJS-1A. S. IF CUR B CUT IS f"OUNO NOT STANDAAD, ENTIRE CURB AND CUTTER MUST BE REMOVED TO THE NEXT NEAREST JOINT. CI TY OF AUSTIN DCPIOITlil[NT (]rPU!UC WORKS CURB CUT FOR RAMP OR DRIVEWAY <OPTIONAL..l DCP<;l~~NTO~ ~T~ORKS CURB CUT FOR RAMP OR DRIVEWAY <OPTIONAL..l RE~u~&t~ED o::~: l~~~lfi2g~J:~~SUSE RE~u~&t~ED o::~: l~~~lfi2g~J:~~SUSE CITY APPROVAL SITE PLAN RELEASE ===~ :=:::l:~YM~Sl_OO_OO ____ _ .o.P!>ROVEO BY CllYCOUNCILON __ ___ _ UnderSection .!!?. ofCl>ap!O< ~ OIThoAIJ•tinCif>ICode Dn<:tor . Depanmontof Pl arv'1in9andDo~ OATE~RELEASE . _ ___ Zonlng: _ _ _ ~ C.1J !!C>t AA [)R Corf6Clioo1 Corf6Clioo2 ~" ~.!!_ OF 10 .. /I/ ~ I / / ' / I ~ t NOTES camw:roA l lW.l.CAU. 1EXMl111111 Clll.1-llllQ.Ml.ll71)FOll;llTLrTY LOC.\TDllPlllCJITOAlft'MlflC~OO'YEAllEIENTOlllTfl:ETllOHT-Oi<WAY 2. lHISl'ROPBfTYlll AFFECTBJllY1DD-Fl.OODPLAl'l.UIHOWNa<lntE FLOCIJl'lllURANCEllA"TEMN'FQRTIIAVl!ICOUNTV, TEXMNID INOGV'ORA1EDN'EAll,No.414UC04461,EFFECT111EDATE.wl.IARYl.21118 l'l'llPNE!llll'lHEFBJERALEMEltGENCYMAllMlEr.ENTNEfC:f. ~ .EE-:sr: .... I§ ..... w~ ~ hi ;;:::ii. ~~· L.. 8 ~·~ r-:C( ~ ~ ~'? ~ ~<~ i! e " \5 0 ~ a: ti w z ::! ;; . N ~ ~ z ti '1 ~ i ~i h .. w ~~ Iii~ 1:jc ~ -...._ ,_ - .... """- ' I ,.. I I . --- -...._ . I I I \ ) ~---------~------- "· "o"o'""''"""'"' / I / ' J\' \ / EXISTING DRAINAGE . ~ ' r:~1 '.~I :: .. I ~ ,,, .. ::. I::,;. I::. I I ~~· 1 ~:· 1 ... •• ... •• •• .• c:---i I I / , .. I ---------~------- •oc· '"o"o'""''o '""" / ' SITE TABLE AC SQ.FT TOTAL SITE I 0.68 29,415.52 IMPERVIOUS COVER I 0.03 1,219.07 1U2AMltSt ,."'POHdCondtiont) ,,...,_,~_,.,...,,...,.,,,..,_,.c.....,c""""'* VII, A Al , . PROPOSED DRAINAGE _,, Al"" EwOI hf Ql! !1! a.it llf!t . . . . . A!!llfl 1.11 1111.1'1 LEGEND AND NOTES ::-:-=·1 -- 1----1--·-- 1 ! iii -~ -::I :: ·3 ! iii ·• ~ ! ··I '! •• ::-:=I -- d . ill ! J ----1--·-- 1 ! - iii :: ·3 ! .• -ii -o•• ·'l '! 0 --7---7-- ~ ~ ~ CITY APPROVAL - - - d" SITE PLAN RELEASE 10 CASE MANAGER: :::!~~~::i::~-o,-.---- APPRO\IEDBYCITYCOUNCILON: _____ _ '-"-S-llillla.ptor~Oln.-nClyCad• D1.-.0o.,.mw.1<1Plml'llrci-Dlwl011rnonl DATEOFRELEAliiE: ____ Zallrci: __ _ i""'iiil""i lR C.al !!CH. M =~==========~~ ~N~OF10 TRACTS I THRU IV NOTES INSTRUMENT NO. 2000024480 108 LIMITS OF CONSTRUCTION: 0.146 AC 1. O.P.R.T.C.TX. THE ENVIRONMENTAL INSPECTOR HAS THE AUTHORITY TO ADD AND/OR MODIFY EROSION/SEDIMENTATION CONTROL ON SITE TO KEEP PROJECT IN-COMPLIANCE WITH THE CITY OF AUSTIN RULES AND REGULATIONS. THE CONTRACTOR SHALL PROVIDE DUST CONTROL MEASURES DURING ALL SITE CONSTRUCTION SUCH AS IRRIGATION TRUCKS AND MULCHING CONSISTENT WITH ECM 1.4.5(D) OR AS DIRECTED BY THE ENVIRONMENTAL INSPECTOR. 4. SILT FENCE TYPE AND INSTALLATION SHALL COMPLY WITH ECM 1.4.2(G). 2. 3. 5. P T P T W W W A STE W ATE R V O L. 11900 P G 840 E A S E M E N T R.P.R.T.C.TX. W W 009 0 10' 20' 40' SCALE: 1" = 20' 008 THE HATCHED AREA IN THE CWQZ REQUIRES NATIVE GRASSLAND SEEDING AND PLANTING PER CITY OF AUSTIN STANDARD SPECIFICATION 609S.6 INCLUDING TOPSOIL T P AND SEED BED PREPARATION, TEMPORARY IRRIGATION AND WEED MAINTENANCE. T P LOC SF LOC P T C O L TP 006 007 T P F S P T C O L LOC T P SF TP TP SF C O L RESTORATION OF THE NORTHERN BANK SHOULD BE TO THE STANDARDS SHOWN IN PERMIT #GP-2014-0593.WPD, USING D50=24" BULLROCK MH 118979 W W F C S O L 25' - 0" SETBACK WW 6" CONC (90-0020) N 70°35'43" W 40.01' C O F S L 3-FT WIDE COFFER DAM SEVERE SERVICE ROCK BERM ENCAPSULATED IN IMPERMEABLE GEOMEMBRANE. WW C O L F S K C A B T E C O L F S CONTRACTOR SHALL REMOVE ALL THE BULLROCK IN THE CREEK, ASSOCIATED WITH THE TEMPORARY BRIDGE AND ROCK BERM COFFER DAMS, AFTER THE PERMANENT BRIDGE IS CONSTRUCTED. THE CONTRACTOR SHALL SUBMIT A DE-WATERING PLAN WHICH MAY INCLUDE A TEMPORARY DIVERSION CHANNEL, DIVERSION PIPE, PUMPS, COFFER DAM, OR OTHER APPROVED METHODS AND SHALL OBTAIN DE-WATERING PLAN APPROVAL PRIOR TO CONSTRUCTION. SANDBAGS, EARTHEN DIKES OR OTHER ERODIBLE MATERIALS ARE NOT ACCEPTABLE. THE CONTRACTOR SHALL MAINTAIN DE-WATERING SYSTEM AS NECESSARY TO ENSURE PROPER PERFORMANCE. IF THE DE-WATERING SYSTEM IS NOT PERFORMING, THE CONTRACTOR MUST FOLLOW THE ENVIRONMENTAL INSPECTOR'S DIRECTIONS TO ENSURE ADEQUATE SYSTEM PERFORMANCE. 6. ALL REVEGETATION SHALL CONFORM TO CITY OF AUSTIN SPECIFICATIONS. 7. CITY OF AUSTIN ENVIRONMENTAL CRITERIA MANUAL, SECTION 3.5.4 TREE AND NATURAL PRESERVATION: a. PRIOR TO EXCAVATION WITHIN TREE DRIPLINES OR THE REMOVAL OF TREES ADJACENT TO OTHER TREES THAT ARE TO REMAIN, MAKE A CLEAN CUT BETWEEN THE DISTURBED AND UNDISTURBED ROOT ZONES WITH A ROCK SAW OR SIMILAR EQUIPMENT TO MINIMIZE ROOT DAMAGE. b. IN CRITICAL ROOT ZONE AREAS THAT CANNOT BE PROTECTED DURING CONSTRUCTION WITH FENCING AND WHERE HEAVY VEHICULAR TRAFFIC IS ANTICIPATED, COVER THOSE AREAS WITH FOUR (4) INCHES OF ORGANIC MULCH OR GRAVEL TO MINIMIZE SOIL COMPACTION. c. PERFORM ALL GRADING WITHIN CRITICAL ROOT ZONE AREAS BY HAND OR WITH SMALL EQUIPMENT TO MINIMIZE ROOT DAMAGE. d. WATER ALL TREES MOST HEAVILY IMPACTED BY CONSTRUCTION ACTIVITIES DEEPLY ONCE A WEEK DURING PERIODS OF HOT, DRY WEATHER. SPRAY TREE CROWNS WITH WATER PERIODICALLY TO REDUCE DUST ACCUMULATION ON THE LEAVES. e. WHEN INSTALLING CONCRETE ADJACENT TO THE ROOT ZONE OF A TREE, USE A PLASTIC VAPOR BARRIER BEHIND THE CONCRETE TO PROHIBIT LEACHING OF LIME INTO THE SOIL. 8. IF NO CONSTRUCTION IS SCHEDULED IN A DISTURBED AREA FOR MORE THAN 14 DAYS, THE DISTURBED AREA MUST BE STABILIZED BY REVEGETATION, MULCH, TARP OR REVEGETATION MATTING. 9. ALL CURB INLETS SHALL HAVE TYPE II INLET PROTECTION WHICH SHALL REMAIN IN PLACE UNTIL THE COMPLETION OF ALL CONSTRUCTION AND REVEGETATION ACTIVITIES. 10. A PRECONSTRUCTION MEETING WITH THE ENVIROMENTAL INSPECTOR IS REQUIRED PRIOR TO ANY SITE DISTURBANCE. 11. “SPECIAL CONSTRUCTION TECHNIQUES ECM 3.5.4(D) PRIOR TO EXCAVATION WITHIN TREE DRIPLINES OR THE REMOVAL OF TREES ADJACENT TO OTHER TREES THAT ARE TO REMAIN, MAKE A CLEAN CUT BETWEEN THE DISTURBED AND UNDISTURBED ROOT ZONES WITH A ROCK SAW OR SIMILAR EQUIPMENT TO MINIMIZE ROOT DAMAGE. CRITICAL ROOT ZONE AREAS THAT CANNOT BE PROTECTED DURING CONSTRUCTION WITH FENCING AND WHERE HEAVY VEHICULAR TRAFFIC IS ANTICIPATED, COVER THOSE AREAS WITH A MINIMUM OF 12 INCHES OF ORGANIC MULCH TO MINIMIZE SOIL COMPACTION. IN AREAS WITH HIGH SOIL PLASTICITY GEOTEXTILE FABRIC, PER STANDARD SPECIFICATION 620S, SHOULD BE PLACED UNDER THE MULCH TO PREVENT EXCESSIVE MIXING OF THE SOIL AND MULCH. ADDITIONALLY, MATERIAL SUCH AS PLYWOOD AND METAL SHEETS, COULD BE REQUIRED BY THE CITY ARBORIST TO MINIMIZE ROOT IMPACTS FROM HEAVY EQUIPMENT. ONCE THE PROJECT IS COMPLETED, ALL MATERIALS SHOULD BE REMOVED, AND THE MULCH SHOULD BE REDUCED TO A DEPTH OF 3 INCHES. PERFORM ALL GRADING WITHIN CRITICAL ROOT ZONE AREAS BY HAND OR WITH SMALL EQUIPMENT TO MINIMIZE ROOT DAMAGE. ABANDONED ALLEY W W WATER ALL TREES MOST HEAVILY IMPACTED BY CONSTRUCTION ACTIVITIES DEEPLY ONCE A WEEK DURING PERIODS OF HOT, DRY WEATHER. SPRAY TREE CROWNS WITH WATER PERIODICALLY TO REDUCE DUST ACCUMULATION ON THE LEAVES. WHEN INSTALLING CONCRETE ADJACENT TO THE ROOT ZONE OF A TREE, USE A PLASTIC VAPOR BARRIER BEHIND THE CONCRETE TO PROHIBIT LEACHING OF LIME INTO THE SOIL.” LEGEND COA FULLY DEVELOPED FLOODPLAIN FEMA 100 YEAR FLOOD PLAIN THE ESC SHEET AND RESTORATION PLAN MUST BE USED IN CONJUNCTION FOR THE INSTALLATION OF THE TEMPORARY ROCK BERMS AND THE CONSTRUCTION OF THE PERMANENT BRIDGE. TP SF W W R E F F U D B R A Z A N H S I O O R 1 0 0' E · GRASSES SHALL CONSTITUTE 67 PERCENT OF THE SEED MIX, WITH FORBS COMPRISING 33 PERCENT. NO SPECIES SHALL CONSTITUTE MORE THAN 20% OF A SEED MIX. PLANTS MUST BE A MINIMUM SIZE OF 1-GALLON (SEE TABLE 8, EQUIVALENCY CHART) AND MINIMUM OF 1 PLANT PER 100 SQUARE FEET. THE MUST BE SPECIES FROM THIS LINK <HTTP://WWW.AUSTINTEXAS.GOV/DEPARTMENT/G ROW-GREEN/PLANT-GUIDE> OUT OF THE REQUIRED AMOUNT THE DIVERSITY WILL NEED TO BE TWO NATIVE SPECIES OF SMALL OR LARGE TREES AND TWO NATIVE SPECIES OF SHRUBS WITH VERY LOW OR LOW WATER NEEDS AND SUN OR SUN/PART SHADE LIGHT NEEDS AS LISTED IN THE CURRENT GROW GREEN NATIVE AND ADAPTED LANDSCAPE PLANTS GUIDANCE DOCUMENT WITH CAP STAMPED "SEELIG" W W TP W W TP T P WITH CAP STAMPED "SEELIG" T P W W T P T P 011 010 W W BEFORE RELEASE OF FISCAL, THE ENVIRONMENTAL INSPECTOR IS TO CONTACT CHARLIE KEOUGH WITH WATERSHED PROTECTION AT 512-974-3397, CHARLES.KAOUGH@AUSTINTEXAS.GOV AND HANK MARLEY AT HANK.MAREY@AUSTINTEXAS.GOV FROM DEVELOPMENT SERVICES TO ENSURE THAT THE RESTORATION OF CITY EROSION CONTROL IS COMPLETE. TP P T 19.86' W W P T SF LOC 005 T P TP N 70°35'43" W 42.17' F S L O C W W W W 25' - 0" SETBACK SF LOC W W L O C F S 3-FT WIDE COFFER DAM SEVERE SERVICE ROCK BERM ENCAPSULATED IN IMPERMEABLE GEOMEMBRANE. W W W W L O C F S MH 118977 ON-SITE SEDIMENT LADEN WATER SHALL BE PUMPED AND TREATED USING DEWATERING FILTER BAG W W L O C F S K C A B T E 5' - 0" S 2' 1.3 9 ~ F S 10-FT WIDE BULL ROCK BERM USED FOR ACCESS. L O C 8" E 3'0 8°0 N 2 L O C F S ℄ 0) 2 0 0-0 9 9 G (S-1 4" F W W 2 W W ODPLAIN C.W.Q.Z. W W COA FULLY DEVELOPED FLO FEMA 100 YEAR FLO L W W W W W OD PLAIN W W LOT 8 W L W W W L W L TP L O C TP F S F S W W NAIL SET AT BASE OF TREE T P 001 T P W L W W W L F H 1 6 4 8 3 1 W L WL W L T P L O C 6 " W L ( N O T S H O W N O N S V C I N T 1 8 5 8 3 ) A W U W W W L WL L O C F S P T L O C P T S E 25' - 0" T B A C K S F SF LOT 7 L O C LOC STABILIZED CONSTRUCTION ENTRANCE W L C.W.Q.Z. W L M H 2 7 3 8 2 W W W W W L AWU WTR INT: 18583 AWU WW PROF: A180 W L W W 8" SDR-26 PVC (S-2007-0004) W W L W WL W. ANNIE STREET (R.O.W. VARIES) M H 1 1 8 9 8 7 W W W W W W W W W W W W W W SF T P 003 F S T P T P P S F T 004 5' - 0" S 2' 4.2 C O 9 L 8" W ~ 3'0 8°0 002 S 2 C O L P T P T C O L TP T P F S C O L T P F S C O L F S C O L LOT 6 SQUARE HEAD BOLT FOUND NORTH EXTENSION TO BOULDIN ADDITION TREE LEGEND BOOK 2, PG. 135 P.R.T.C.TX. 1 0 0 ' E R O S I O N H A Z A R D B U F F E R CITY APPROVAL LOT 5 SITE PLAN RELEASE FILE NUMBER: _________________ EXPIRATION DATE: ___________ Sheet Of 13 12 CASE MANAGER: _________________ APPLICATION DATE: ___________ APPROVED ADMINISTRATIVELY ON: _____________________________ APPROVED BY PLANNING COMMISSION ON: _______________________ APPROVED BY CITY COUNCIL ON: _____________________________ Under Section 112 of Chapter 25-5 Of The Austin City Code ____________________________________________________________________ Director, Department of Planning and Development DATE OF RELEASE: __________________ Zoning: ______________ Rev 1 ____________________ Correction 1 _________________________ Rev 2 ____________________ Correction 2 _________________________ Rev 3 ____________________ Correction 3 _________________________ REVISIONS SCALE SCALE 0 DR. CJM CH. AA P.M. MZ BOOK -- JOB 19002268 SHEET NO. 12 __ OF 13 . I - G W D T S E R E N N A E L F D A C I : COA CASE NO: SP-2020-0093DS THIS DOCUMENT IS RELEASED FOR THE PURPOSE OF INTERIM REVIEW UNDER THE AUTHORITY OF MARK T. ZUPAN #128994 ON THE DATE SHOWN ON THE DATE STAMP. IT IS NOT TO BE USED FOR CONSTRUCTION, BIDDING, OR PERMIT PURPOSES. Know what's below. Call before you dig. THE LOCATIONS OF EXISTING UNDERGROUND UTILITIES ARE SHOWN IN AN APPROXIMATE WAY ONLY AND HAVE NOT BEEN INDEPENDENTLY VERIFIED BY THE OWNER OR ITS REPRESENTATIVE. THE CONTRACTOR SHALL DETERMINE THE EXACT LOCATION OF ALL EXISTING UTILITIES BEFORE COMMENCING WORK, AND AGREES TO BE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES WHICH MIGHT BE OCCASIONED BY THE CONTRACTOR'S FAILURE TO EXACTLY LOCATE AND PRESERVE ANY AND ALL UNDERGROUND UTILITIES. NOTICE: CONSTRUCTION SITE SAFETY IS THE SOLE RESPONSIBILITY OF THE CONTRACTOR; NEITHER THE OWNER NOR THE ENGINEER SHALL BE EXPECTED TO ASSUME ANY RESPONSIBILITY FOR SAFETY OF THE WORK, OF PERSONS ENGAGED IN THE WORK, OF ANY NEARBY STRUCTURES, OR OF ANY OTHER PERSONS. COPYRIGHT C 2019 ATWELL LLC NO REPRODUCTION SHALL BE MADE WITHOUT THE PRIOR WRITTEN CONTENT OF ATWELL LLC 0 0 3 E T U S I , I Y A W H G H S A X E T F O L A T P A C I . S 5 1 8 3 4 0 7 8 7 X T , I N T S U A 9 0 5 0 - 4 0 9 - 2 1 5 : F / 5 0 5 0 - 4 0 9 - 2 1 5 : O 2 4 2 2 1 . o N E P B T 4 0 7 8 7 X T , I N T S U A I N A L P N O T A R O T S E R & S N E T E E R T S E N N A I . W 2 1 1 1 X T A N A B R U T N E L C I DATE October 15, 2020 I Z E N T R A M S O L R A C M A 9 2 : 6 0 2 0 2 / 5 1 / . \ I I - 0 1 G W D T S E R E N N A N O T C U R T S N O C T H S N G S E D E N N A 2 1 1 1 X T A N A B R U E T A V R P \ I \ I \ I \ \ : T 10/15/2020N 69°09'00" W 42.41' L C W W L C L C L C L C W W K C A B T E 5' - 0" S W W W W L C L C L C L C L C L C 3' 1.5 0" E 9 0'0 0°0 N 3 L C L C L C L C L C L C L C L C L C L C L C L C W L L C S E 25' - 0" T B A C K LOT 7 W W W W ℄ W W MH 118977 W W W W W W W W 0) 2 0 0-0 9 9 · GRASSES SHALL CONSTITUTE 67 PERCENT OF THE SEED MIX, WITH FORBS COMPRISING 33 PERCENT. NO SPECIES SHALL CONSTITUTE MORE THAN 20% OF A SEED MIX. PLANTS MUST BE A MINIMUM SIZE OF 1-GALLON (SEE TABLE 8, EQUIVALENCY CHART) AND MINIMUM OF 1 PLANT PER 100 SQUARE FEET. THE MUST BE SPECIES FROM THIS LINK <HTTP://WWW.AUSTINTEXAS.GOV/DEPARTMENT/G ROW-GREEN/PLANT-GUIDE> OUT OF THE REQUIRED AMOUNT THE DIVERSITY WILL NEED TO BE TWO NATIVE SPECIES OF SMALL OR LARGE TREES AND TWO NATIVE SPECIES OF SHRUBS WITH VERY LOW OR LOW WATER NEEDS AND SUN OR SUN/PART SHADE LIGHT NEEDS AS LISTED IN THE CURRENT GROW GREEN NATIVE AND ADAPTED LANDSCAPE PLANTS GUIDANCE DOCUMENT 2 G (S-1 4" F C L C L C L C L C L C L C L C L C L C L C L C L LOT 6 SQUARE HEAD BOLT FOUND L C L C L C C L L C STABILIZED W L W L W L 6 " LC W L ( N O T S H O W N O N S V C I N T 1 8 5 8 3 ) A W U LC LC L C I Z E N T R A M S O L R A C M P 1 3 : 3 / . \ I I / - 0 2 0 2 4 1 0 1 G W D T N L P E N N A N O T C U R T S N O C T H S N G S E D E N N A 2 1 1 1 \ X T A N A B R U E T A V R P \ I \ I \ I \ : T 0 5' 10' 2.5' WW SCALE: 1" = 5' NOTES 6" CONC (90-0020) N 68°15'00" W 38.88' GRASS MIX 67% FROM TABLE 4: BUFFALO GRASS 20% FOR SHADE AREA (FROM TABLE 5): CANADA WILDRYE 20% SIDEOATS GRAMA 20% INLAND SEAOATS 7% WESTERN WHEATGRASS TO REPLACE INLAND SEAOATS IF PLANTED BETWEEN SEPT 15TH AND MARCH 1ST. FORBS 33% FROM TABLE 5: PURPLE CONEFLOWER 6% MILKWEED 11% WINECUP FLOWER 11% BLACK EYED SUSAN 5% Know what's below. Call before you dig. THE LOCATIONS OF EXISTING UNDERGROUND UTILITIES ARE SHOWN IN AN APPROXIMATE WAY ONLY AND HAVE NOT BEEN INDEPENDENTLY VERIFIED BY THE OWNER OR ITS REPRESENTATIVE. THE CONTRACTOR SHALL DETERMINE THE EXACT LOCATION OF ALL EXISTING UTILITIES BEFORE COMMENCING WORK, AND AGREES TO BE FULLY RESPONSIBLE FOR ANY AND ALL DAMAGES WHICH MIGHT BE OCCASIONED BY THE CONTRACTOR'S FAILURE TO EXACTLY LOCATE AND PRESERVE ANY AND ALL UNDERGROUND UTILITIES. NOTICE: CONSTRUCTION SITE SAFETY IS THE SOLE RESPONSIBILITY OF THE CONTRACTOR; NEITHER THE OWNER NOR THE ENGINEER SHALL BE EXPECTED TO ASSUME ANY RESPONSIBILITY FOR SAFETY OF THE WORK, OF PERSONS ENGAGED IN THE WORK, OF ANY NEARBY STRUCTURES, OR OF ANY OTHER PERSONS. COPYRIGHT C 2019 ATWELL LLC NO REPRODUCTION SHALL BE MADE WITHOUT THE PRIOR WRITTEN CONTENT OF ATWELL LLC RESTORATION OF THE NORTHERN BANK SHOULD BE TO THE STANDARDS SHOWN IN PERMIT #GP-2014-0593.WPD, USING D50=24" BULLROCK C L MH 118979 W W W W W W C L C L C L C L C L C L C L C L C L K C A B T E 6' 4.6 0" W 9 0'0 0°0 S 3 C L C L 5' - 0" S C L C L C L C L THE HATCHED AREA IN THE CWQZ REQUIRES NATIVE GRASSLAND SEEDING AND PLANTING PER CITY OF AUSTIN STANDARD SPECIFICATION 609S.6 INCLUDING TOPSOIL AND SEED BED PREPARATION, TEMPORARY IRRIGATION AND WEED MAINTENANCE. THIS DOCUMENT IS RELEASED FOR THE PURPOSE OF INTERIM REVIEW UNDER THE AUTHORITY OF MARK T. ZUPAN #128994 ON THE DATE SHOWN ON THE DATE STAMP. IT IS NOT TO BE USED FOR CONSTRUCTION, BIDDING, OR PERMIT PURPOSES. 0 0 3 E T U S I , I Y A W H G H S A X E T F O L A T P A C I . S 5 1 8 3 4 0 7 8 7 X T , I N T S U A 9 0 5 0 - 4 0 9 - 2 1 5 : F / 5 0 5 0 - 4 0 9 - 2 1 5 : O 2 4 2 2 1 . o N E P B T 4 0 7 8 7 X T , I N T S U A N A L P G N T N A L P I T E E R T S E N N A I . W 2 1 1 1 X T A N A B R U LEGEND TREE LEGEND CITY APPROVAL SITE PLAN RELEASE FILE NUMBER: _________________ EXPIRATION DATE: ___________ Sheet Of 13 11 CASE MANAGER: _________________ APPLICATION DATE: ___________ APPROVED ADMINISTRATIVELY ON: _____________________________ APPROVED BY PLANNING COMMISSION ON: _______________________ APPROVED BY CITY COUNCIL ON: _____________________________ Under Section 112 of Chapter 25-5 Of The Austin City Code ____________________________________________________________________ Director, Department of Planning and Development DATE OF RELEASE: __________________ Zoning: ______________ Rev 1 ____________________ Correction 1 _________________________ Rev 2 ____________________ Correction 2 _________________________ Rev 3 ____________________ Correction 3 _________________________ REVISIONS SCALE SCALE 0 DR. CJM CH. AA P.M. MZ BOOK -- JOB 19002268 SHEET NO. 11 __ OF 13 . I - G W D T N L P E N N A E L F D A C I : COA CASE NO: SP-2020-0093DS NORTH EXTENSION TO BOULDIN ADDITION T N E I L C DATE October 14, 2020 Case No.: (Cityuaeonly) - - - - - - - - I Environmental Resource Inventory For the City of Austin Related to LDC 25-8-121, City Code 30-5-121, ECM 1.3.0 & 1.10.0 The ERi Is required for projects that meet one or more of the criteria llsted In LDC 25-B-121(A), City Code 30-5-121(A). 1. SITE/PROJECT NAME: _o_.6 7_-a_c_re_p_ro_pe_rt_Y _______________ _ _ 2. COUNTY APPRAISAL DISTRICT PROPERTY ID (#'s): _________ _ 302243 and 302246 3. ADDRESS/LOCATION OF PROJECT: - - - - - - - - - - - - - - - 1112 West Annie Residential Driveway 4. WATERSHED: West Bouldin Creek 5. THIS SITE IS WITHIN THE (Checkallthatapply) Edwards Aquifer Recharge Zone* (See note below) .................. DYES GINo Edwards Aquifer Contributing Zone* .................................. DYES GINo Edwards Aquifer 1500 ft Verification Zone* ....................... DYES GINo Barton Spring Zone* .......................................................... DYES GI No *(as defined by the City of Austin - LDC 25-8-2 or City Code 3CJ-5-2) Note: If the property is over the Edwards Aquifer Recharge zone, the Hydrogeologic Report and karst surveys must be completed and signed by a Professional Geoscientist Licensed in the State of Texas. 6. DOES THIS PROJECT PROPOSE FLOODPLAIN MODIFICATION? ....... DYES** GINO If yes, then check all that apply: D (1) The floodplain modifications proposed are necessary to protect the public health and safety; D (2) The floodplain modifications proposed would provide a significant, demonstrable enviormenlBI benefit, as determined by a functional assessment of floodplain health as prescribed by the Environmental Criteria Manual (ECM), or D (3) The floodplain modifications proposed are necessary for development allowed in the ab/ water quality zone under LDC 25-8-261 or 25-8-262. City Code 30-S-261 or 30-S-262. D ( 4) The floodplain modifications proposed are outside of the Critical Water Quality Zone in an area determined to be in poor or fair condition by a functional assessment of floodplain health. ** If yes, then a functional assessment must be completed and attached to the ERi (see ECM 1. 7 and Appendix X for fonns and guidance) unless conditions 1 or 3 above apply. 7. IF THE SITE IS WITHIN AN URBAN OR SUBURBAN WATERSHED, DOES THIS PROJECT PROPOSE A UTILITY LINE PARALLEL TO AND WITHIN THE CRITICAL WATER QUALITY ZONE? ......................................................... DYES*** GINO -if yes, then riparian restoration is required by LDC 25-8-261{E) or City Code 30-5-261{E) and a functional assessment must be completed and attached to the ERi (see ECM1.5 and AppendixX for forms and guidance). 0 8. There is a total of __ (#'s) Critical Environmental Feature(s)(CEFs) on orwithin150 feet of the project site. If CEF(s) are present, attach a detailed DESCRIPTION of the CEF(s), color PHOTOGRAPHS, the CEF WORKSHEET and provide DESCRIPTIONS of the proposed CEF buffer(s) and/or wetland mitigation. Provide the number of each type of CEFs on or within 150 feet of the site {Please provide the number of CEFs ): _o_ (#'s) Spring(s)/Seep(s) _o_(#'s) Point Recharge Feature(s) _o_(#'s) Bluff(s) _o __ (#'s) Canyon Rimrock(s) _o_ (#'s) Wetland(s) Note: Standard buffers for CEFs are 150 feet with a maximum of 300 feet for point recharge features. Except for weUands, if the standard buffer is aw provided. you must provide a written request for an administrative variance from LDC 25-IJ.281(C)(1) and provide written findings of fact to support your request. Beqyut tgans me admlnt•t@tlye yadances fmm mqylrcazcnts stated In LDC 25-8-281 ' " ayallable fcpm Wafecshed Prpfec'ion Deeactment 9. The following site maps are attached at the end of this report (Check all that apply and provide): All ERi reports must include: G Site Specific Geologic Map with 2-ft Topography ca Historic Aerial Photo of the Site ca Site Soil Map G Critical Environmental Features and Well Location Map on current Aerial Photo with 2-ft Topography Only if present on site (Maps can be combined): D Edwards Aquifer Recharge Zone with the 1500-ft Verification Zone (Only if site is over or within 1500 feet the recharge zone) D Edwards Aquifer Contributing Zone G Water Quality Transition Zone (WQTZ) D Critical Water Quality Zone (CWQZ) D City of Austin Fully Developed Floodplains for all water courses with up to 64-acres of drainage 10. HYDROGEOLOGIC REPORT - Provide a description of site soils, topography, and site specific geology below (Attach additional sheets if needed): Surface Soils on the project site is summarized in the table below and uses the SCS Hydrologic Soil Groups*. If there is more than one soil unit on the project site, show each soil unit on the site soils map. Soil Series Unit Names, Infiltration Characteristics & Thickness *Soil Hydrologic Groups Definitions (Abbreviated) Soil Series Unit Name & Subgroup** Group* Thickness (feet) Ur - Urban Land n/a variable Utd: Urban land, Austin and Br n/a variable A. Soils having a high infiltration rate when thoroughly wetted. B. Soils having a moderate infiltration rate when thoroughly wetted. C. Soils having a slow infiltration rate when thoroughly wetted. D. Soils having a verv slow infiltration rate when thoroughly wetted. **Subgroup Classification - See Classification of Soil Series Table in County Soil Survey. WPD ERM ERl-2014-01 Page 2 of6 Description of Site Topography and Drainage (Attach additional sheets if needed}: The subject site is within the Elm Creek Watershed, as classified by the City of Austin (COA, 2009). Topographically, the site ranges from approximately 495- to 510-feet above mean sea level. Drainage occurs primarily by overland sheet that flows into an West Bouldin Creek, which flows from southwest to northeast. Most of the subject property is within the 100-year floodplain (FEMA, 2006). The natural regions of Texas were delineated largely on the basis of soil type (Godfrey et al. 1973) and major vegetation types (McMahan et al. 1984 ). The subject site is situated within the Urban vegetation region of Texas (McMahan et al., 1984). The subject site is situated within the Blackland Prairie vegetation region of Texas (Thomas & Gould, 1975). List surface geologic units below: Group Fonnation Member Geologic Units Exposed at Surface Qtt-Quaternary Tributary Terrace Kbu - Buda Limestone Austin Chalk Kau - Austin Chalk Brief description of site geology (Attach additional sheets if needed): The subject site is under lain by the Ausin Chalk, Buda, and Austin Tributary Terrace Deposit; The Buda Formation consists of a hard, gray to tan, dense, nodular limestone, with abundant fossil mollusks with a lower, marly, nodular, and less resistant limestone (Gamer et al, 1976). It is about 40 to 50 feet thick in northeastern Hays and southwestern Travis counties (Small et al., 1996; Hanson and Small, 1995). T The Austin Chalk Group consists of a ledge-forming, grayish-white to white limestone chalk interbedded with marl (Gamer et al, 1976; Small et al., 1996). The chalk is composed of microgranular calcite, with minor foraminifera tests. The Austin Chalk Group is described as 325 to 420 feet thick (thickening westward) by Garner and Young (1976), and from 130 to 150 feet thick by Small et al. (1996). Primary field identification characteristics of the Austin Group include white, chalky limestone with fossilized pelecypods Pycnodonte aucella and lnoceramus subquadratus (Small et al., 1996). Quaternary high terrace deposits consist of unconsolidated gravel, sand, silt, and clay (Garner et al, 1976). Wells - Identify all recorded and unrecorded wells on site (test holes, monitoring, water, oil, unplugged, capped and/or abandoned wells, etc.): There are O (#)wells present on the project site and the locations are shown and labeled -0- o(#'s)The wells are not in use and have been properly abandoned. _(#'s)The wells are not in use and will be properly abandoned. ~(#'s)The wells are in use and comply with 16 TAC Chapter 76. There are ~(#'s) wells that are off-site and within 150 feet of this site. WPO ERM ERl-2014-01 Page 3of6 11. THE VEGETATION REPORT - Provide the infonnation requested below: Brief description of site plant communities (Attach additional sheets if needed): Vegetation is characterized as wooded uban land. Canopy species consist of mainly pecan ( Carya 11/inoisensis) with scattered sugarberry (Ce/tis laevigata) and plateau live oak (Quercus fusiformis). Understory species include poison ivy (Toxicodendron radicans) yaupon (/lex vomitoria), and greenbriar (Smilax sp.). There is woodland community on site ............................. DYES D NO (Check one). If yes, list the dominant species below: Woodland species Scientific Name Carya 11/inoisensis Ce/tis laevigata Common Name pecan sugarberry plateau live oak There is grassland/prairie/savanna on site ................. DYES G NO (Check one). If yes, list the dominant species below: Grassland/prairie/savanna species Common Name Scientific Name There is hydrophytic vegetation on site .................... DYES G NO (Check one). If yes, list the dominant species in table below (next page): WPD ERM ERl-2014-01 Page 4of6 Hydrophytic plant species Common Name Scientific Name Wetland Indicator Status A tree survey of all trees with a diameter of at least eight inches measured four and one half feet above natural grade level has been completed on the site. GIVES D NO (Check one). 12. WASTEWATER REPORT- Provide the information requested below. Wastewater for the site will be treated by (Check of that Apply): D G D On-site system(s) City of Austin Centralized sewage collection system Other Centralized collection system Note: All sites that receive water or wastewater service from the Austin Water utility must comply with City Code Chapter 15-12 and walls must b8 registered with the City of Austin The site sewage collection system is designed and will be constructed to in accordance to all State, County and City standard specifications. GIVES D NO (Check one). Calculations of the size of the drainfield or wastewater irrigation area(s) are attached at the end of this report or shown on the site plan. DYES D NO [!] Not Applicable (Check one). Wastewater lines are proposed within the Critical Water Quality Zone? DYES G NO (Check one). If yes, then provide justification below: WPD ERM ERl-2014-01 Page 5of6 Is the project site is over the Edwards Aquifer? DYES ~ NO (Check one). If yes, then describe the wastewater disposal systems proposed for the site, its treatment level and effects on receiving watercourses or the Edwards Aquifer. 13. One (1) hard copy and one (1) electronic copy of the completed assessment have been provided. . Date(s) ERi Field Assessment was performed: 3/22/2020 ~~~~~~~~~~~~~~~~ Date(s) My signature certifies that to the best of my knowledge, the responses on this form accurately reflect all information requested. Kristin Miller, P.G. Print Name ~m.rn~ Signature Escarpment Environmental Name of Company 512-415-6986 Telephone kristin@escarpmentenv.com Email Address 4/13/2020 Date For project sites within the Edwards Aquifer Recharge Zone, my signature and seal also certifies that I am a licensed Professional Geoscientist in the State of Texas as defined by ECM 1.12.3(A}. P.G. Seal WPD ERM ERl-2014-01 Page 6of 6 ESCARPMEN T\ENVI RONMENTAL Geologic & Environmental Consulting for land Development Attachment 1 Critical Environmental Feature (CEF) worksheet City of Austin Environmental Resource Inventory - Critical Environmental Feature Worksheet 1 2 3 4 9 Project Name: 0.67-acre property Project Address: 1112 West Annie Residential Driveway Site Visit Date: 3/22/2020 Environmental Resource Inventory Date: 4/13/2020 5 6 7 8 Primary Contact Name: Kristin Miller Phone Number: 512-415=6986 Prepared By: Kristin Miiier, Escarpment Environmental Email Address: kristin@escarpmentenv.com {Wetland,Rimrock, Bluffs,Recharge FEATURE TYPE Feature,Spring) FEATURE ID (egS-1) FEATURE LONGITUDE (WGS 1984 in Meters) FEATURE LATITUDE (WGS 1984 in Meters) coordinate notation coordinate notation WETLAND DIMENSIONS (ft) RIM ROCK/BLUFF DIMENSIONS (ft) RECHARGE FEATURE DIMENSIONS Springs Est. Discharge x y Length Avg Height x y z Trend ds I City of Austin Use Onlyl CASE NUMBER: I For rimrock, locate the midpoint of the segment that describes the feature. For wetlands, locate the r.rft~~1r:l~ae1~i~R~Jl~~~rea. For a spring or seep, locate m~t~i~~ lp§~ onf~~~- /~ tJ ;;r Please state the method of coordinate data collection and the approximate precision and accuracy of the points and the unit of measurement. Method GPS Accuracy sub-meter Surveyed D meter Other > 1 meter D D D D D Professional Geologists apply seal below WPD ERM ERl-CEF-01 Page 7 of 8 ESCARPMENT \ENVIRONMENTAL Geologic & Environmental Consulting for Land Development 13109 RESEARCH BOUUVARD, SUITE 500 AUSTIN, TEXAS 71750 PHONE: 512-415-6986 KRISTI N@ESCARPM E NTENV .COM Environmental Resource Inventory References City of Austin, Accessed 2018, Property Profile Map Federal Emergency Management Agency (FEMA), 2006, Q3 Flood Data, Travis County, Texas. Garner, L. E., and K. P. Young, 1976, Environmental Geology of the Austin Area: An Aid to Urban Planning, Report of Investigations 86, The University of Texas at Austin, Bureau of Economic Geology. McMahan, C.A., R.G. Frye, and K.L. Brown, 1984, The Vegetation Types of Texas, Including Cropland, Texas Parks and Wildlife Department, 40 p. NRCS Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey. Rose, P.R, 1972, Edwards Group, surface and subsurface, central Texas: Austin, Texas, University of Texas, Bureau of Economic Geology, Report of Investigations 74. TCEQ, 2005, Edwards Aquifer Recharge Zone Boundary Maps Texas Water Development Board (TWDB), 2013, Water Well Drillers' Records US Fish and Wildlife Service (USFWS), 1993, National Wetland Inventory map, Austin East Quad, Texas (scale 1 :24,000), U.S. Department of the Interior, Washington, D.C. US Geological Survey (USGS), 1987, 7.5' Austin East, Texas, Topographic Quadrangle Map. The University of Texas -Bureau of Economic Geology (UT-BEG), Geologic Atlas of Texas, 15-minute Digital GAT Quad SE, 1981. Werchan, Leroy E., A.C. Lowther, and Robert N. Ramsey, 1974, Soil SuNeyof Travis County, Texas, US Department of Agriculture, Soil Conservation Service, in cooperation with the Texas Agricultural Experiment Station. ESCARPMEN T\ENVI RONMENTAL Geologic & Environmental Consulting for land Development Attachment 2 Figures and Maps USGS Topographic Map, Austin West, 1987 Legend C Project Boundary ~ Floodplain (FEMA, 2006) 1 inch = 200 feet 0 100 200 Feet Travis County ! ESCARPMENT~ENVIRONMENTAL Geolo91c & £nvlronmento1 Consult Ing for lond Development USGS Topographic Map 0.67-acre property 1112 West Annie Street Austin, Travis County, Texas E102005-soils/4.13.2020/km Aerial Photograph: CAPCOG, 2016 Soil: NRCS Soil Survey Staff, 2006 Legend D Project Boundary NRCS Soil Types: Ur: lrgam Spo;s Utd: Urban land, Austin and Brackett soils, 1 to 8% slopes 1 inch = 60 feet o 30 60 Feet Travis County ! ESCARPMENT\ENVI RONMENTAL Geolog1c & En•ironmentoll Consulting for lond DeYelopment Soils Map 0.67-acre property 1112 West Annie Street Austin, Travis County, Texas Aerlal Photograph: CAPCOG, 1996 Legend c:J Project Boundary ~ Floodplain (FEMA, 2006) 1 inch = 80 feet 0 40 80 Feet Travis County ! ESCARPMENT~ENVIRONMENTAL Geolo91c & £nvlronmento1 Consult Ing for lond Development 1998 Historic Aerial Photo Map 0.67-acre property 1112 West Annie Street Austin, Travis County, Texas Aerlal Photograph: CAPCOG, 1996 Legend D Project Boundary ~ Qtt; Tributary terrace ~ Kau; Austin Chalk ~ Kef; Eagle Ford Fm D Watershed (COA, 2007) The seal appearing on this document was authorized by Kristin M. Miller, P.G. # 1720 13 April 2020. ! ESCARPMENT~ENVIRONMENTAL Geolo91c & £nvlronmento1 Consult Ing for lond Development 1 inch = 60 feet 0 30 60 Feet 1998 Historic Aerial Photo Map 0.67-acre property 1112 West Annie Street Austin, Travis County, Texas ESCARPMEN T\ENVI RONMENTAL Geologic & Environmental Consulting for land Development Attachment 3 Site Geologic Map Edwards Aquifer Transition Zone Kau 005·gaologlc/4.13.2020/km Kef Kau Legend D Project Boundary D Ott; Tributary terrace D Kau; Austin Chalk D Ket; Eagle Ford Fm c::J Edwards Aquifer Recharge Zone ~ Floodplain (FEMA, 2006) . .•.••• , ,,.,,,., The seal appearing on this document was authorized by Kristin M. Miller, P.G. # 1720 13 April 2020 . ! Site Geologic Map 0.67-acra property 1112 Wast Annie Streat Austin, Travis County, Texas ESCARPMEN T\ENVI RONMENTAL f r land Development Geologic & Environmental Consu ting o I . Attachment 3 Photographs ESCARPMENT ~ENVIRONMENTAL Geologic & Environmental Consulting for land Development Photo 1-West Bouldin Creek Photo - Typical view of the project area