Item 5 - PlansN 89°51'00" W
180.60'
S 89°51'00" E180.60'N 0°00'00" 137.00'S 0°00'00" 137.00'ORIGINAL 30' F.B.L.35' F.B.L. ACCORDING ZONE SF-20B15' S.Y.35' R.B.L.15' S.Y.10' U.E.VISTA TRAILSADDITIONBLOCK 1 LOT 8RVISTA TRAILSADDITIONBLOCK 3 LOT 31RVISTA TRAILS ADDITION BLOCK 3 LOTS 29 & 30OVERLAND TRAIL(50' R.O.W.)RIDGEWOOD ADD.SOUTHLAKEBLOCK 2 LOT 3035' F.B.L. ACCORDING ZONE SF-20BORIGINAL 30' F.B.L.A20.05A10.15A30.11A40.29DIRECTION OFEXISTING FLOW(TYP.)DRAINAGE AREABOUNDARY(TYP.)EG716.72'EG723.47'EG722.03'EG715.83'EXISTINGRETAINING WALLTO REMAINEXISTINGRETAINING WALLSTO REMAININSTALL 12" X 12" CATCH BASINMAXIMUM TOP OF GRATEELEVATION = 720.00' WITHADJACENT DOWNSTREAMGRADE OF 720.50'FF=721.50'EXISTINGDWELLINGFF=721.50'PROPOSEDADDITIONPROPOSEDDIRECTION OFFLOW (TYP.)DRAINAGE AREANO. ANDACERAGE (TYP.)SHEET1REVISION12/06/21 - INITIAL SUBMITTALCMS PROJECT NO.:21053CHRISTOPHER M. STAUD, P.E. - FIRM 166053557 SUFFOLK DRIVE, FORT WORTH, TX 76109817-807-5034 - CSTAUD@OUTLOOK.COM700 OVERLAND TRAILSOUTHLAKE, TX 76092DRAINAGE PLANNOTES:1.SHOULD THIS PLAN BE MODIFIED EOR IS TO BE NOTIFIED IMMEDIATELY.2.RUNOFF CALCULATED UTILIZING THE RATIONAL METHOD PER NCTCOG ISWM HYDROLOGY MANUALUSING TARRANT COUNTY RAINFALL INTENSITIES.3.MINIMUM TIME OF CONCENTRATION IS 15 MINUTES PER ISWM HYDROLOGY TECHNICAL MANUALTABLE 1.5.4.EXISTING 0.5 FT CONTOURS DEVELOPED FROM NCTCOG 2020 LIDAR DATA.5.EXISTING DRAINAGE AREAS TO BE MAINTAINED WITH NO NET CHANGE IN DRAINAGE AREAS WITHRUNOFF DIRECTED FROM BACK TO FRONT OF LOT. RUNOFF NOT TO BE CONVEYED TO ADJACENTLOTS.6.MINIMUM FINISH GRADE ADJACENT TO DWELLING TO BE 6" BELOW FINISH FLOOR ELEVATION OR721.00.7.MINIMUM SLOPE AWAY FROM DWELLING TO BE 10% (6 INCHES WITHIN 5 FT)8.THIS PLAN HAS BEEN PREPARED TO SIGNIFICANTLY REDUCE THE POTENTIAL FOR FLOODING OFTHE PROPOSED STRUCTURE. THE PLAN DOES NOT GUARANTEE THAT THE LOT WILL CARRYSHEET DRAINAGE DURING RAINFALL EVENTS EXCEEDING THE 100-YEAR DESIGN STORM. THEPLAN DOES NOT GUARANTEE AGAINST FLOODING OF THE PROPOSED STRUCTURE DUE TONATURAL OR MAN-MADE CHANGES IN UPSTREAM OR DOWNSTREAM TOPOGRAPHY.9.ALL DRIVEWAYS SHALL BE CONSTRUCTED IN ACCORDANCE PER CITY OF SOUTHLAKE STANDARDDRIVEWAY CONSTRUCTION DETAILS.10.DRAINAGE AREA A1 - RUNOFF TO BE INTERCEPTED WITH A 12" X 12" NDS 1200NGB CATCH BASIN(OR EQUIVALENT). TOP OF GRATE TO BE SET AT 720.00' TO PROVIDE A MINIMUM OF 0.5 FEET OFHEAD. CATCH BASIN TO BE CONNECTED TO A 6 INCH MINIMUM DIAMETER SOLID WALL SEWERAND DRAIN PIPE AND DISCHARGED AT THE FRONT OF LOT TO THE WEST OF THE DWELLING ANDPROPOSED IMPROVEMENTS. MINIMUM SLOPE OF 6 INCH PIPE TO BE IS 1.50% WITH CLEANOUTSPROVIDED AT 50 FT MINIMUM SPACING.11.DRAINAGE AREA A2 - ALL ROOF RUNOFF TO BE TIED INTO A SEPARATE 6 MINIMUM DIAMETERSOLID WALL SEWER AND DRAIN PIPE TO BE DISCHARGED AT THE FRONT OF THE LOT TO THEWEST OF THE DWELLING AND PROPOSED IMPROVEMENTS. MINIMUM GRADE GRADE OF 6 INCHPIPE IS 1.50% WITH CLEANOUTS PROVIDED AT 50 FOOT MINIMUM SPACING.12.DRAINAGE AREA A3 - IMPROVEMENTS RESULT IN NO IMPACT ON SYSTEM WITH RUNOFFNATURALLY CONVEYED TO THE WEST. EXISTING ROOF DRAIN SYSTEM TO BE MAINTAINED WITHPOSITIVE OUTFALL TO THE WEST.13.DRAINAGE AREA A4 - NO IMPROVEMENTS ARE PLANNED WITHIN THIS AREA. EXISTING ROOFDRAINAGE SYSTEM, SLOPES AND SWALES TO BE MAINTAINED TO CONVEY RUNOFF TO THE SOUTHAND THEN WEST OF THE EXISTING DWELLING. NO ADDITIONAL RUNOFF TO BE DIVERTED TO THISAREA.SCALE: 1"= 10'