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Home My WebLink About20051881 Ver 1_Worksheets_20051121 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUB<<IITIED DESIGN.• 1 REQUIRED DESIGN: 11 /21 /2005 elevations 2.7 average depth status Bottom of Basin (ft) 834 ~•---~ Permanent Pool (ft) 843.5 9.5 ft. de ~ check de ~t! Temporary Pool (ft) 845.6 ft. depth ok areas Permanent Pool SA (sq ft) 9860 4969 sq. ft. ok Drainage Area (ac) 19.3 .2772 based on avg depth ok Impervious Area (ac) 5.48 28.4 % - volumes Permanent Pool (cu ft) 26287 Temporary Pool (cu ft) 25276 21406 cu. ft. ok Forebay (cu ft) 6690 25.4 % check forebc other parameters SA/DA 1.06 0.59 - Orifice Diameter (in) 1.375 0.05 efs drawdown - Design Rainfall (in) 1 5.8 day drawdown check drax~u Linear Interpolation of Correct SA/DA ** 9.5 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 20 0.44 0.226255578 1.08 Project Impervious 28.4 0.59 0.33 1.37 Next Highest 30 0.62 0.349479716 1.43 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SU13~117TED DESIGN.• 1 REQUIRED DESIGN: 11 /21 /2005 elevations 2.7 average depth status Bottom of Basin (ft) 834 Permanent Pool (ft) 840 6 ft. depth ok Temporary Pool (ft) 845.6 5.6 ft. depth ok areas Permanent Pool SA (sq ft) 9860 6654 sq. ft. ok Drainage Area (ac) 19.3 5019 based on avg dept/r ok Impervious Area (ac) 5.48 28.4 % - volumes Permanent Pool (cu ft) 26287 Temporary Pool (cu ft) 25276 21406 cu. ft. ok Forebay (cu ft) 5500 20.9 % ok other parameters SA/DA 1.06 0.79 - Orifice Diameter (in) 1.375 0.08 cfs drawdown - Design Rainfall (in) 1 3.5 day drawdown ok Linear Interpolation of Correct SA/DA 6 ft. Permanent Pool Depth Im ervious SAlDA fron (Avg. Depth) Next Lowest 20 0.59 0.426351927 1.08 Project Impervious 28.4 0.79 0.60 1.37 Next Highest 30 0.83 0.629614604 1.43 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUBMITTED DESIGN.• 2 REQUIRED DESIGN.• 1 1 /2 112005 elevations 2.9 average depth status Bottom of Basin (ft) 843 Permanent Pool (ft) 850.4 7.4 ft. depth check depth Temporary Pool (ft) 852.3 1.9 ft. depth ok areas Permanent Pool SA (sq ft) 16763 8383 sq. ft. ok Drainage Area (ac) 16.5 8335, based on avg depth ok Impervious Area (ac) 8.88 53.8 % - volumes Permanent Pool (cu ft) 47921 Temporary Pool (cu ft) 36269 32006 cu. ft. ok Forebay (cu ft) 7620 15.9 % check jorebc other parameters SAlDA 2.03 1.17 - Orifice Diameter (in) 1.75 0.08 cfs drawdown - Design Rainfall (in) 1 5.4 day drawdown check drativc Linear Interpolation of Correct SA/DA 7.4 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 50 1.09 1.091412635 1.08 Project Impervious 53.8 1.17 1.16 1.21 Next Highest 60 1.29 1.27022311 1.43 3 ft 4 Project Namc: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUII~II7TED DESIGN.• 2 REQUIRED DESIGN.• 11 /21 /2005 elevations 2.9;average depth status Bottom of Basin (ft) 843 Permanent Pool (ft) 849 6 ft. depth ok Temporary Pool (ft) 852.3 3.3 ft. depth ok areas Permanent Pool SA (sq ft) 16763 9920 sq. ft. ok Drainage Area (ac) 16.5 10089 based on avg depth ok Impervious Area (ac) 8.88 53.8 % - volumes Permanent Pool (cu ft) 47921 Temporary Pool (cu ft) 36269 32006 cu. ft. ok Forebay (cu ft) 9000 18.8 % ok other parameters SA/DA 2.03 1.38 - Orifice Diameter (in) 2 0.13 cfs drawdown - Design Rainfall (in) 1 3.1 day drawdown ok Linear htterpolation of Correct SA/DA 6 ft. Permanent Pool Depth Im ervtous SA/DA fron (Avg. Depth) Next Lowest 50 1.3 1.331077969 1.08 Project Impervious 53.8 1.38 1.40 1.21 Next Highest 60 1.51 1.52130108 1.43 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUBMITTED DESIGN: 3 REQUIRED DESIGN.• 11 /21 /2005 elevations 1.6 average depth status Bottom of Basin (ft) 843 Permanent Pool (ft) 849.5 6.5 ft. depth check depth Temporary Pool (ft) 850.5 1 ft. depth ok areas Permanent Pool SA (sq ft) 56242 5654 sq. ft. ok Drainage Area (ac) 14.8 876 based on avg depth ok Impervious Area (ac) 5.75 38.9 % - volumes Permanent Pool (cu ft) 87434 Temporary Pool (cu ft) 30540 21471 cu. ft. ok Forebay (cu ft) 17500 20.0 % ok other parameters SA/DA 1.69 0.88 - Orifice Diameter (in) 1.875 0.07 cfs drawdown - Design Rainfall (in) I 5.4 day drawdown check drmva Linearlnterpolation of Correct SA/DA*** 6.5 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 30 0.7 0.150749262 1.08 Project Impervious 38.9 0.88 0.14 1.39 Next Highest 40 0.9 0.13393976 1.43 3 ft 4 Project Name: Piedmont Cr Project No. DWQ OS-1881 Pond No. SUBMITTED DESIGN.• 3 REQUIRED DESIGN: 11/21/2005 elevatio~ts 1.6 average depth status Bottom of Basin (ft) 843 Permanent Pool (ft) 849 6 ft. depth ok Temporary Pool (ft) 850.5 1.5 ft. depth ok areas Permanent Pool SA (sq ft) 56242 5654 sq. ft. ok Drainage Area (ac) 14.8 876 based on avg depth ok Impervious Area (ac) 5.75 38.9 % - volumes Permanent Pool (cu ft) 87434 Temporary Pool (cu ft) 30540 21471 cu. ft. ok Forebay (cu ft) 17500 20.0 % ok outer parameters SA/DA 1.69 0.88 - Orifice Diameter (in) 2.5 0.14 cfs drawdown - Design Rainfall (in) 1 2.5 day drawdown ok Linearlnterpolation ojCorrect SA/DA*** 6 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 30 0.7 0.150749262 1.08 Project Impervious 38.9 0.88 0.14 1.39 Next Highest 40 0.9 0.13393976 1.43 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUBMITTED DESIGN.• 3 REQUIRED DESIGN: I 1 /21 /2005 elevations 1.6 ,average depth status Bottom of Basin (ft) 843 Permanent Pool (ft) 849 6 ft. depth ok Temporary Pool (ft) 850.5 1.5 ft. depth ok areas Permanent Pool SA (sq ft) 56242 6606 sq. ft. ok Drainage Area (ac) 14.8 3205 based on avg dept/: ok Impervious Area (ac) 5.75 38.9 % - volumes Permanent Pool (cu ft) 87434 Temporary Pool (cu ft) 30540 21471 cu. ft. ok Forebay (cu ft) 17500 20.0 % ok other parameters SA/DA 1.69 1.02 - Orifice Diameter (in) 2.5 0.14 cfs drawdown - Design Rainfall (in) 1 2.5 day drawdown ok Linearlnterpolation ojCorrect SA/DA*** 6 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 30 0.83 0.46865083 1.08 Project Impervious 38.9 1.02 0.50 1.39 Next Highest 40 1.05 0.500749262 1.13 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUBhII7TED DESIGN: 3 REQUIRED DESIGN: 11 /21 /2005 elevations 3.4 average depth status Bottom of Basin (ft) 843 Permanent Pool (ft) 849 6 ft. depth ok Temporary Pool (ft) 850.5 1.5 ft. depth ok areas Permanent Pool SA (sq ft) 26000 6606 sq. ft. ok Drainage Area (ac) 14.8 7460; based on avg depth ok Impervious Area (ac) 5.75 38.9 % - volumes Permanent Pool (cu ft) 87434 Temporary Pool (cu ft) 30540 21471 cu. ft. ok Forebay (cu ft) 17500 20.0 % ok other parameters SA/DA 1.69 1.02 - Orifice Diameter (in) 2.5 0.14 efs drawdown - Dcsign Rainfall (in) 1 2.5 day drawdown ok Linear Interpolation of Correct SA/DA 6 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 30 0.83 0.920711538 1.08 Project Impervious 38.9 1.02 1.16 1.39 Next Highest 40 1.05 1.187881538 1.43 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUBh1ITTED DESIGN: 4 REQUIRED DESIGN: 11/21/2005 elevations 2.8 average depth status Bottom of Basin (ft) 871 Permanent Pool (ft) 877.2 6.2 ft. depth check depth Temporary Pool (ft) 878.8 1.6 ft. depth ok areas Permanent Pool SA (sq ft) 10817 5716 sq. ft. ok Drainage Area (ac) 13 5241 based on avg depth ok Impervious Area (ac) 4.96 38.2 % - volumes Permanent Pool (cu ft) 29903 Temporary Pool (cu ft) 22033 18564 cu. ft. ok Forebay (cu ft) 4630 I5.5 % check forebc other parameters SA/DA 1.6 1.01 - Orifice Diameter (in) 1.375 0.04 efs drawdown - Design Rainfall (in) 1 5.7 day drawdown check drawG Linear Interpolatiai of Correct SA/DA 6.2 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 30 0.83 0.771111214 1.08 Project Impervious 38.2 1.01 0.93 1.37 Next Highest 40 1.05 0.960489045 1.43 3 ft 4 Project Name: Piedmont Cr Project No. D~VQ OS-1881 Pond No. SUBMITTED DESIGN.• 4 REQUIRED DESIGN: 11 /21 /2005 elevations 2.8 average depth status Bottom of Basin (ft) 871 Permanent Pool (ft) 877 6 ft. depth ok Temporary Pool (ft) 878.8 1.8 ft. depth ok areas Permanent Pool SA (sq ft) 10817 5716 sq. ft. ok Drainage Area (ac) 13 5241. based on avg depth ok Impervious Area (ac) 4.96 38.2 % - volumes Permanent Pool (cu ft) 29903 Temporary Pool (cu ft) 22033 18564 cu. ft. ok Forebay (cu ft) 6000 20.1 % ok other parameters SA/DA 1.6 1.01 - Orifice Diameter (in) 2 0.10 cfs drawdown - Design Rainfall (in) 1 2.6 day drawdown ok Linear h~terpolation of Correct SA/DA *** 6 ft. Permanent Pool Depth Im ervious SA/DA fron (Avg. Depth) Next Lowest 30 0.83 0.771111214 1.08 Project Impervious 38.2 1.01 0.93 1.37 Next Highest 40 1.05 0.960489045 1.43 3 ft 4 Project No. D~VQ Piedmont Cr Project Name: OS-1881 11 /21 /2005 SUBMITTED DESIGN.• 1 REQUIRED DESIGN: elevatiais Permanent Pool (ft) 835 6.5 ft. depth Temporary Pool (ft) 841.5 areas Permanent Pool SA (sq ft) 4613 3746 sq. ft. Drainage Area (ac) 2.7 ac Impervious Area (ac) 1.32 48.9 % impervious Rational C 0.65 Precipitation (in) 0.7 no sand underdrain volumes Inlet Velocity 1.4 0 fps Inlet Flow Depth 3.7 in Depth to Ground I['ater 6 6 ft Planting Soil Infiltration 1 0.52 in/hr In-Situ Soil Infiltration 0.27 0.00 in/hr check depth ok check veloci ok ok Project No. D~VQ Piedmont Cr Project Name: 05-1881 11/21/2005 SUBMITTED DESIGN.• 2 REQUIRED DESIGN.• elei~ations Permanent Pool (ft) 845 6.5 ft. depth Temporary Pool (ft) 851.5 areas Permanent Pool SA (sq ft) 4783 3885 sq. ft. Drainage Area (ac) 2.8 ac Impervious Area (ac) 1.31 46.8 % impervious Rational C 0.65 Precipitation (in) 0.7 no sand underdrain volumes Inlet Velocity 1.8 0 fps Inlet Flow Depth 4.8 in Depth to Ground lI'ater 6 6 ft Planting Soil Infiltration 1 0.52 in/hr In-Situ Soil Infiltration 0.27 0.00 in/hr check depth ok check reloci ok ok