E-6 C15-2022-0021 PRESENTATION — original pdf

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3701 ROBBINS ROAD Case #C15-2022-0021 Bhavani Singal Principal Architect Workshop No. 5 COVER PAGE REQUESTS 1. A variance to decrease the front yard setback from 40’ to 15’. 2. A variance to increase the maximum impervious coverage requirement for portions of the site with slopes of 0-15% from 35% to 45%. 3. A variance to increase the maximum impervious coverage requirement for portions of the site with slopes of 26- 35% from 5% to 6%. WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/1-PRESENTATIONA100 5 telephone pedestal 5 3 5 0 3 5 wall EXISTING GARAGE OUTSIDE SIDE SETBACK 5 2 5 8 3 5 7 3 65 3 5 PROPOSED RESIDENCE WATER RECAPTURE AREAS 0 2 5 5 1 5 0 1 5 5 0 5 wall with wrought iron fence 0 0 5 EXISTING RESIDENCE LANDSCAPED GREEN SPACES SITE CONSTRAINTS old rock wall xx x x 5 1 5 wall t u o - n a e c l K C A B T E S N I T S U A E K A ' L 5 7 SEPTIC TANK SEPTIC DRAIN FIELD wood deck conc. steps WATER WELL 5 2 5 2022 SF ROOF DRAINAGE AREA FOR RAINWATER COLLECTION 520'-0" NEW 512'-6" EXISTING CISTERN OVERFLOW DRAIN CISTERN OVERFLOW RAIN GARDEN 2000 GAL CISTERN TO BE USED FOR IRRIGATION xx 0 2 5 515 xx xx FRONT YARD SETBACK - LAO 100 YEAR FLOODPLAIN ELEVATION 518'-0" 0 0 5 5 9 4 4 9 4 3 9 4 xx WATER'S EDGE 493'-0" 4 9° xx EXISTING CONDITIONS & DESIGN CONSTRAINTS 2 8 9 1 , 2 2 L I R P A E R O F E B D E D R O C E R T A L P F I K C A B T E S 5' 2 K C A B T E S N T S U A E K A L I ' 5 7 1. wall boat dock There is a 45’ change in level from the street to the water’s edge. 2. Existing house is in the 100-year floodplain. Proposed house is lifted 7’-6" above existing slab to allow a 2’ freeboard. This pushes the entry level up 2’-3" above the existing garage level. 3. The aging clients require a boatslip (deckabove) concrete boatslip (deckabove) 5 9 4 xx k c e d k c e d wood deck e t e r c n o c f o e g d e r e t a w smooth, no-step access from the garage to the main living areas, necessitating an enclosed "bridge". 4. The existing garage is located at a natural flat spot on the lot. Moving the garage behind the 40’ setback would increase the length, steepness, and impervious cover of the driveway approach. 5. The existing driveway is narrow, dangerously steep, and placed immediately after a hairpin curve. Reconfiguring the driveway and moving it further from the bend in the road will increase the safety of the homeowner and their visitors. 6. An existing water well constrains building placement. E N I L Y T R E P O R P E G D E S R E T A W ' I K C A B T E S N T S U A E K A L S U O V E R P I ' 5 2 e n i l t o l e v o b a s n u r e n i l y t i l i t u d a e h r e v o RAINWATER TO FLOW TO TRENCH DRAIN 5 3 5 - TRENCH DRAIN IN DRIVE, DRAIN TO RAIN GARDEN 531'-9" NEW 529'-6" EXISTING LANDSCAPING FRONT YARD SETBACK - PROPOSED K C A B T E S ' 5 1 0 3 5 E N I L Y T R E P O R P : k r a m h c n e b n o e l g n a i r t y r a r o p m e t d e l e s i h c ' 4 9 . 6 3 5 t a l l a w g n i v a p f o e g d e T E E R T S F O E G D E STREET LEVEL 538' - 0" ENTRY LEVEL 531' - 9" (E) GARAGE 529' - 6" GROUND LEVEL 520' - 0" 100 YR.FLOODPLAIN 518' - 0" (E) GROUND LEVEL 512' - 6" WATER'S EDGE 493' - 0" K C A B T E S ' 0 4 WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/2-PRESENTATIONFLOATING BRIDGES The enclosed connection from the garage to the residence is a "floating bridge", allowing water to flow beneath. The walkway from the driveway to the front door is floating, and constructed of metal grate material, as shown below, to allow water to pass through to the ground below. FLOATING BRIDGES Both connection points from the parking to the house are "floating" above grade. The metal grate walkway from the driveway to the front door. WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/3-PRESENTATIONTOTAL LOT SQUARE FOOTAGES PER SLOPE DESIGNATION ALLOWED IMP COVER % EXISTING IMP COVER % EXISTING IMP COVER S.F. 35% 10% 5% 0% 45% 6% 6% 11% 5425.39 201 397 66 6089.39 SLOPE 0-15% 16-25% 26-35% 35% + 12106 3648 6354 615 22723 EXISTING IMP TOTAL SF EXISTING IMP TOTAL % 6089.39 27% 1/2 " LEGEND Iron Rod Calculated Found Wood Point Wrought Iron Fence Overhead Utililty Fence Line xx guy wire (Record Bearing and Distance) telephone pedestal wall 2.1' 538 7 3 5 536 535 2.6' 1 530 SLOPE PERCENTAGE MAP OF THAT CERTAIN TRACT OUT OF THE JAMES JETT SURVEY NO. 1, ABSTRACT NO. 437 IN TRAVIS COUNTY, TEXAS, WHICH IS KNOWN AS "LOT B, OAK SHORES," AN UNRECORDED SUBDIVISION, AND BEING ALL OF THAT CERTAIN TRACT CONVEYED TO ANGELINE D. THOMAS BY DEED RECORDED IN VOLUME 8840 PAGE 201 OF THE REAL PROPERTY RECORDS OF TRAVIS COUNTY, TEXAS. LOCATED AT 3701 ROBBINS ROAD. PAGE 2 OF 2 TREE LIST 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 15" Juniper 8" Hackberry 9" Hackberry 9" Hackberry 8" Hackberry 8" Hackberry 11" Hackberry 11" Hackberry 11" Hackberry 29.5" Live Oak (11", 14" and 17" stems) 14" Hackberry 15" Hackberry 18" Hackberry 10" Cedar Elm 35" Hackberry 13" Pecan 40" Magnolia 31" Pecan 25" Hackberry 3278 3279 3280 3281 3282 3283 3284 3285 3286 SLOPE MAP- EXISTING IMPERVIOUS COVER SCALE: 1"=20' 5') D) (4 A O BIN R O D (R 68 2 3 A O S R BIN e lot lin B O R e v o b ns a e ru d utility lin g vin a e of p g d e a e erh ov 0' 0.0 0 8'E E1 " 0') 0 5°2 1'0 0.0 2 5°3 0 N 0 53 ( 1 2 N 1.1' concrete drive 5 53 2529 S F 79 2 3 525 78 2 3 201 SF 75 2 3 74 2 3 77 2 3 76 2 3 525 ell ater w w "LOT A" 3280 0 2 5 S 6 (S 4°1 2 3 2 3 6 4°1 4'E 6'1 1.9 5 6') 1.1 " E 6' old rock wall 81 2 3 5 1 5 xx xx 82 2 3 wall 5 1 5 2678 SF 1.1' 1.7' 83 2 3 0 1 5 ut n-o a cle This survey was completed without the benefit of a current title commitment. This lot may be subject to restrictions and easements not shown hereon. Tree "crowns" shown hereon are drawn as a function of trunk diameter. One inch of trunk diameter equals one foot of crown radius. Multi-trunk trees are drawn calculated on the full diameter of the largest stem plus one half of the diameter of each additional stem. Due to natural variations in tree growth, these generalized depictions may not correlate to actual tree crowns or root zones. Elevations shown hereon are based on GPS observations over a Trimble RTK network. NAVD88 datum. 19" Pecan David S. Stein and Jenny Kerwick Document No. 2010142322 wall with wrought iron fence 105 SF 143.5 SF in concrete 49.5" Texas Ash (41" and 17" stems) xx w all deck b o at d ock at slip e) v b o deck c o (d b o e n ck a crete at slip e) v o b b o (d e ck a e ck w o o d d to bo w u n S 6 4°1 C d est ary olora River 9'0 4 " E gr a die of the o nt d 0 0 5 w o o d d e conc. steps ck 495 3' concrete edge of water 99.7 6°14'W 99.88') 9'37" W 3 218 SF (S 35°5 S PREPARED: May 19. 2021 BY: 495 2.5' 494 493 xx to bo w u n C d est ary olora River 0 " W 6'2 N 6 4°4 gr a die of the o nt d Anne Thayer Registered Professional Land Surveyor No. 5850 HOLT CARSON, INC. 1904 FORTVIEW ROAD AUSTIN, TX 78704 (512) 442-0990 Texas Licensed Surveying Firm No. 10050700 69 2 3 70 2 3 "LOT C" "OAK SHORES" unrecorded 5 2 0 3271 3272 2.5' 1 3273 5 1 5 3286 rock step JAMES JETT SURVEY NO. 1 ABSTRACT NO. 437 SLOPE SUMMARY- EXISTING Staci Barton, trustee of The SBSG Trust (0.459 Acres) Document No. 2012192860 Slope Category lot category 45% area of lot percentage of within slope category within slope 6% 0% - 15% 9,417 Square Feet = 29.68% of lot area greater than 15% - 25% 6,354 Square Feet = 20.03% of the lot area greater than 25% - 35% 3,648 Square Feet = 11.50 % of the lot area greater than 35% 615 Square Feet = 1.94 % of the lot area House Slab Footprint 2,689 Square Feet = 8.48% of the lot area Total Lot Area: 31,726 Square Feet (9,003 Square Feet below the waters surface = 28.37 % of lot area) 11% 6% 5 50 Heidi Wang Lew Document No. 2020193945 previously Angeline D. Thomas Volume 8840 Page 201 xx 3285 xx N 6 4°4 xx 6'2 (N 6 0 " 4°4 2 1 3.2 W2 1 3'W 3.0 3' 8') 3284 500 xx IMPERVIOUS COVER EXHIBIT- EXISTING WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/4-PRESENTATION TOTAL LOT SQUARE FOOTAGES PER SLOPE DESIGNATION ALLOWED IMP COVER % ALLOWED IMP COVER S.F. PROPOSED IMP COVER % PROPOSED IMP COVER TOTAL S.F. EXCESS OVER ALLOWED S.F. PRECEDENT @ 3605 ROBBINS APPROVED IMPERVIOUS VARIANCE SLOPE 0-15% 16-25% 26-35% 35% + 12106 3648 6354 615 22723 35% 10% 5% 0% 4237 364.8 317.7 0 36% 21% 7% 21% 4311.0 761.5 443.5 129.0 5645 74 396.7 125.8 129 725.5 55.2% 25.2% 0.0% 33.7% EXCESS SQUARE FOOTAGE BASED ON SLOPE CALCULATIONS= 725.5. A 2,000 GALLON RAINWATER HARVESTING TANK IS PROPOSED TO MITIGATE. PRECEDENT AT 3605 ROBBINS ROAD WAS APPROVED FOR AN IMPERVIOUS COVERAGE VARIANCE WITH AN EXCESS OF 4,670 SF BASED ON SLOPE CALCULATIONS. 2,000 GALLON RAINWATER HARVESTING TANK PROPOSED EXCESS SQUARE FOOTAGE = 725.5 725.5 X 2.6= 1886.3 SLOPE PERCENTAGE MAP OF THAT CERTAIN TRACT OUT OF THE JAMES JETT SURVEY NO. 1, ABSTRACT NO. 437 IN TRAVIS COUNTY, TEXAS, WHICH IS KNOWN AS "LOT B, OAK SHORES," AN UNRECORDED SUBDIVISION, AND BEING ALL OF THAT CERTAIN TRACT CONVEYED TO ANGELINE D. THOMAS BY DEED RECORDED IN VOLUME 8840 PAGE 201 OF THE REAL PROPERTY RECORDS OF TRAVIS COUNTY, TEXAS. LOCATED AT 3701 ROBBINS ROAD. PAGE 2 OF 2 TREE LIST 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277 15" Juniper 8" Hackberry 9" Hackberry 9" Hackberry 8" Hackberry 8" Hackberry 11" Hackberry 11" Hackberry 11" Hackberry 29.5" Live Oak (11", 14" and 17" stems) 14" Hackberry 15" Hackberry 18" Hackberry 10" Cedar Elm 35" Hackberry 13" Pecan 40" Magnolia 31" Pecan 25" Hackberry 3278 3279 3280 3281 3282 3283 3284 3285 3286 SLOPE MAP- PROPOSED IMPERVIOUS COVER IMPERVIOUS COVER EXHIBIT SCALE: 1"=20' 5') D) (4 A O BIN R O D (R 68 2 3 A O S R BIN e lot lin B O R e v o b ns a e ru d utility lin g vin a e of p g d e a e erh ov 0' 0.0 0 E1 " 0 1'0 129 SF 5°3 2 N 1.1' telephone pedestal 538 7 3 5 536 535 2.6' 1 wall 22.0' frame garage 530 3.2' 2 2.1' 1/2 " LEGEND Iron Rod Calculated Found Wood Point Wrought Iron Fence Overhead Utililty Fence Line xx guy wire (Record Bearing and Distance) "LOT A" 3280 0 2 5 79 2 3 525 77 SF concrete drive 5 53 1721 S F 4 6 3 S F 1 2 4 S F 81 2 3 5 1 5 xx xx 14.1' S 6 (S 4°1 2 3 2 3 6 4°1 6'1 1.9 1.1 4'E 5 6') " E 6' old rock wall 173 SF 9 SF 75 2 3 26 SF 74 2 3 77 2 3 76 2 3 525 carport ell ater w w 2003 SF 666 SF 69 2 3 70 2 3 "LOT C" "OAK SHORES" unrecorded 5 2 0 3271 3272 2.5' 1 A/C pads er ncrete v tile o o c ncrete o c 3273 5 1 5 3286 rock step JAMES JETT SURVEY NO. 1 ABSTRACT NO. 437 SLOPE SUMMARY- PROPOSED Staci Barton, trustee of The SBSG Trust (0.459 Acres) Document No. 2012192860 Slope Category lot category 36% area of lot within slope category within slope percentage of 21% 0% - 15% 9,417 Square Feet = 29.68% of lot area greater than 15% - 25% 6,354 Square Feet = 20.03% of the lot area greater than 25% - 35% 3,648 Square Feet = 11.50 % of the lot area greater than 35% 615 Square Feet = 1.94 % of the lot area House Slab Footprint 2,689 Square Feet = 8.48% of the lot area Total Lot Area: 31,726 Square Feet (9,003 Square Feet below the waters surface = 28.37 % of lot area) 21% 7% xx 22 SF xx 3285 N 6 4°4 xx 6'2 (N 6 0 " 4°4 2 1 3.2 W2 1 3'W 3.0 3' 8') 3284 500 xx 192 SF 9 SF 33 SF wall ut n-o a cle 7 SF 67 SF 19" Pecan 82 2 3 0 1 5 5 50 Heidi Wang Lew Document No. 2020193945 previously Angeline D. Thomas Volume 8840 Page 201 This survey was completed without the benefit of a current title commitment. This lot may be subject to restrictions and easements not shown hereon. Tree "crowns" shown hereon are drawn as a function of trunk diameter. One inch of trunk diameter equals one foot of crown radius. Multi-trunk trees are drawn calculated on the full diameter of the largest stem plus one half of the diameter of each additional stem. Due to natural variations in tree growth, these generalized depictions may not correlate to actual tree crowns or root zones. Elevations shown hereon are based on GPS observations over a Trimble RTK network. NAVD88 datum. David S. Stein and Jenny Kerwick Document No. 2010142322 wall with wrought iron fence 105 SF 143.5 SF in concrete 49.5" Texas Ash (41" and 17" stems) xx w all deck b o at d ock at slip e) v b o deck c o (d b o e n ck a crete at slip e) v o b b o (d e ck a e ck w o o d d to bo w u n S 6 4°1 C d est ary olora River 9'0 4 " E gr a die of the o nt d 0 0 5 w o o d d e conc. steps ck 495 3' concrete edge of water 99.7 6°14'W 99.88') 9'37" W 3 218 SF (S 35°5 S PREPARED: May 19. 2021 BY: 495 2.5' 494 493 xx to bo w u n C d est ary olora River 0 " W 6'2 N 6 4°4 gr a die of the o nt d Anne Thayer Registered Professional Land Surveyor No. 5850 HOLT CARSON, INC. 1904 FORTVIEW ROAD AUSTIN, TX 78704 (512) 442-0990 Texas Licensed Surveying Firm No. 10050700 WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/5-PRESENTATIONEXISTING GARAGE IS OUTSIDE THE SIDEYARD SETBACK EXISTING SLAB IS 5’-6" BELOW THE 100-YEAR FLOODPLAIN LEVEL EXISTING CONDITIONS EXISTING ACCESS FROM GARAGE IS STEEPLY SLOPED WITH NO RAILING EXISTING DRIVEWAY IS NARROW AND DANGEROUSLY STEEP WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/6-PRESENTATIONPROPOSED BUILDING EXISTING BUILDING GARAGE WALL BELOW 15' - CURRENT BUILDING SETBACK FROM PROPERTY LINE 15' - PROPOSED BUILDING SETBACK FROM PROPERTY LINE 15' - 0" NEIGHBORHOOD SETBACK EXHIBIT 15' - 0" 10' - 0" 2 0' - 0" 3605 ROBBINS RD 15' - BUILDING SETBACK FROM PROPERTY LINE 3603 ROBBINS RD 10' - BUILDING SETBACK FROM PROPERTY LINE 3601 ROBBINS RD 20' - BUILDING SETBACK FROM PROPERTY LINE NOTE: APPROX PROPERTY LINE ASSUMED FROM POWER LINES ABOVE WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/7-PRESENTATION PROPOSED DEVELOPMENT RENDERINGS SIDE VIEW FLOODPLAIN ELEVATION PROPOSED RESIDENCE BALANCES THE REQUIREMENTS OF THE FLOODPLAIN WITH ACCESS TO THE STREET AND THE WATER’S EDGE WORKSHOP NO. 5ARCHITECTURE & INTERIORS3027 N. Lamar Blvd. #302BAustin, TX 78705512.710.9705www.workshopno5.com3701 ROBBINS RD#C15-2022-0021BOA VARIANCE REQUEST PRESENTATIONAPRIL 11, 2022E-6/8-PRESENTATION