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Boulder County, CO 03746759 4 of 8 <br />N00'12'47"E 7 7' (P) <br />-14.30 <br />LOT 3, BLOCK 5 <br />COLORADO TECHNOLOGICAL CENTER <br />PLANNED UNIT DEVELOPMENT AND SPECIAL REVIEW USE <br />LOCATED IN THE NORTHWEST QUARTER OF SECTION 16, TOWNSHIP 1 SOUTH, RANGE 69 WEST <br />OF THE 6TH P.M., CITY OF LOUISVILLE, COUNTY OF BOULDER, STATE OF COLORADO <br />13.21 <br />13.46 <br />0.5%i <br />j 81.99 <br />15.10 <br />13.92 <br />1.5' <br />\° <br />14.30 14.50 <br />14.50X <br />14.50X <br />14.17 <br />14.17 <br />81.71' <br />12'47"E 397.47' (P) <br />13.61 <br />13.67 <br />13.67 <br />14.48 <br />14.46 <br />14.34 <br />14.30 <br />15.12 <br />15.20 <br />14.46 14.21 14.37 <br />14A2 <br />15.12 <br />15.20 <br />15.50 15.50 <br />15.50 <br />Pf7 1,1 J7� JTT <br />GRADING PLAN <br />SCALE: 1 "=20' <br />14.97 <br />14.20 EX <br />i-14.37EX <br />c5 <br />14.4 X <br />14.52 X <br />LEGEND <br />EX. PROPERTY LINE <br />- - <br />EX. SANITARY SEWER MANHOLE <br />EX. WATER METER <br />EX. WATER VALVE <br />EX. FIRE HYDRANT <br />EX. DECIDUOUS TREE <br />EX. SANITARY SEWER <br />EX. WATER <br />W <br />EX. UNDERGROUND GAS LINE <br />G <br />EX. UNDERGROUND ELECTRIC LINE <br />Pu <br />-••eM - -5525< <br />EXISTING CONTOURS <br />25 <br />PROPOSED CONTOURS <br />POINT WHERE PROPOSED GRADE MEETS <br />EXISTING GRADE <br />x 25.8 <br />PROPOSED SPOT ELEVATION <br />,r25B <br />EXISTING SPOT ELEVATION <br />HISTORIC SHEET FLOW <br />PROPOSED SHEET FLOW <br />KEYED <br />NOTES <br />O <br />1. <br />EXISTING CURB, GUTTER AND ASPHALT PAVEMENT <br />TO REMAIN. <br />2. <br />PROPOSED CONCRETE DRIVE RAMP. <br />3. <br />EXISTING CURB AND GUTTER TO REMAIN. <br />4. <br />PROPOSED CONCRETE SIDEWALK. <br />5. <br />PROPOSED CURB AND GUTTER. <br />6. <br />PROPOSED ASPHALT PAVEMENT. <br />7. <br />PROPOSED TURNAROUND. <br />8. <br />1.5' PARKING OVERHANG IN SIDEWALK AND <br />LANDSCAPE AREAS. <br />9. <br />PROPOSED STORMCEPTOR/WATER QUALITY <br />STRUCTURE. <br />10. <br />PROPOSED MECHANICAL YARD. <br />11. <br />PROPOSED UNDERGROUND DETENTION FACILITY. <br />12. <br />PROPOSED LIMITED RELEASE OUTLET STRUCTURE IN <br />UNDERGROUND DETENTION. <br />13. <br />PROPOSED STORM SEWER FOR ROOF DRAINS. <br />14. <br />PROPOSED 2' CONCRETE DRAIN PAN. <br />15. <br />EXISTING UTILITY EASEMENT. <br />16. <br />EXISTING 22.5' RAILROAD AND DRAINAGE <br />EASEMENT. <br />s.r GRADING <br />NOTES <br />1. <br />GRADE AWAY FROM BUILDINGS AT A MINIMUM 10% SLOPE IN THE <br />FIRST 10 FEET AT LANDSCAPE AREAS AND AT A MINIMUM 2% <br />SLOPE IN THE FIRST 10 FEET AT IMPERVIOUS AREAS, EXCEPT AS <br />NOTED. <br />2. <br />TOP OF FOUNDATION ELEVATION SHALL BE SET AT LEAST 8" ABOVE <br />THE PROPOSED GRADING AT THE EXTERIOR OF THE FOUNDATION <br />AT LANDSCAPE AREAS. <br />3. <br />THE FEMA FLOOD INSURANCE RATE MAP, PANEL 08013C0603J, <br />DATED DECEMBER 18, 2012, INDICATES THAT THE ENTIRE SITE IS <br />OUTSIDE OF ANY MAPPED 500 YEAR FLOODPLAIN. <br />4. <br />PLANS ARE BASED ON A TOPOGRAPHIC SURVEY PREPARED BY <br />FLATIRONS SURVEYING, INC. DATED 06/14/18. <br />5. <br />BENCHMARK: FROM FLATIRONS SURVEYING. A GPS DERIVED <br />ELEVATION WAS ESTABLISHED AT AN ONSITE BENCHMARK AT THE <br />SOUTHEAST PORTION, BEING A #5 REBAR W/ 1.5" ALUMINUM CAP <br />"LS 16406" WITH AN ELEVATION OF 5313.39 FEET. A CHECK SHOT, <br />0.2'±, WAS TAKEN ON NGS POINT Q413, BEING A STEEL ROD <br />LOCATED 0.5 MILES FROM SITE, WITH A PUBLISHED ELEVATION OF <br />5296.02 FEET (NAVD88). NO DIFFERENTIAL LEVELING WAS <br />PERFORMED TO ESTABLISH THIS ELEVATION. <br />6. <br />ALL PROPOSED STORM SEWER UTILITIES INDICATED ON THIS PLAN <br />ARE "PRIVATE." THE CITY OF LOUISVILLE IS NOT RESPONSIBLE FOR <br />THE MAINTENANCE OF THE PRIVATE STORM SEWER. <br />DETENTION POND SUMMARY <br />STAGE <br />VOLUME REQUIRED <br />(CF) <br />VOLUME PROVIDED <br />(CF) <br />WATER SURFACE <br />ELEVATION (FT) <br />RELEASE RATE <br />(CFS) <br />5307.50 <br />11:1) <br />BARKER <br />AINKEA <br />SEACAT <br />ARCHITECTURE <br />brsarch.com <br />Co <br />U <br />a) <br />J <br />CD <br />a) <br />CD <br />a) <br />O <br />m <br />DOCUMENT <br />PACKAGE NOT <br />FOR <br />CONSTRUCTION <br />Project Number: 2018.044 <br />Issue: <br />FINAL PUD & SPECIAL REVIEW USE <br />Date: 24 JULY 2019 <br />Drawn By: <br />Checked By: <br />Revisions: <br />Rev. Date: <br />Sheet title: <br />GRADING <br />PLAN <br />5309.00 <br />100-YR <br />10,890 <br />12,075 <br />5311.00 <br />4of8 <br />©2019 Barker Rinker Seacat Architecture <br />