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HomeMy WebLinkAbout03487 - Technical Information Report - As-built Detention Report� As-built Detention Report FOR Van's Auto Repair Shop at 4405 NE 4t" Street Renton, WA 98059 Building permit#B-080342 October, 2010 �� ��� Prepared for: � Van N�yen 8� Minh-Du Huynh �� �. D�C�=�.�� , � 2012 Duvall Avenue NE � /�� �p;`� � O��nJ 1i'rI i�`tr- Renton, WA 98059 �4�w � " �=�`��. '� �,`Z' ,� ' ~'- ` I � � ��' ; _ � '`� � �' �� - .� I � 989 ..- GI �,� ��.'•z-� � '-> `�I�VAI. ���� �> ��''1 Prepared By: Jerry O'Connell, P.E. � ■ C !'� � E N p 1 M E E R S / b ll R Y E Y D R S � -- _ _ � Lovell-Sauerland & Associates, Inc. 19217 36th Avenue W. Suite 106 Lynnwood, Washington 98036 LSA FILE No: 5102 Executive Summary Conclusion: The as-built tank complies with the targets. The controlled-released durations and 2-year and 10- year peaks are below the required targets. Purpose: This report has been prepared to present calculations based on the as-built information obtained by a September 29, 2010 LSA field survey and site visit. Met/todology: The field-sun�eyed data«�as input into the same computer program (KCRTS v. 6.0)that ���as used to calculate the approved tank. Results: Flow Peaks: Chart#1 in the Appendix shows that the developed 2-year and 10-year release rates are below�the corresponding target release rates. This is one of the criteria for meeting a Level-2 detention facility. Durations: Chart #2 in the Appendix shov�rs that the developed durations are less than the target durations, which is the second criteria required for a Level-2 detention facility. Lovell-Sauerland and Associates Van's Auto Repair Drainage Report February,2009 LSA#5102 Bldg Permit#B-080342 Project Overview , Project Name: Vcrn's Auto Repair ��, Project Site Address: 440�NE 4`h Street Renton, WA 980�9 Assessor Parcel Number: 5182-1000-3902 Project Engineer: Lovell-Sauerland&Associutes, Inc. , 19400 33rd Avenue W., Suite 200 Lynnwood, Washington 98036 � Phone: (425) 775-19�1 'I Project Applicant/Owner: Van Nguyen &Minh-du Huynh 2012 Duvall Ave NE Renton, WA 98059 Project Total Area: 0.535 Acres (23,301s� Disturbed site area: 0.25 Acres (project area) Soils Data: Alderwood(AgC) - Type C soil Modeled as Till in KCRTS I Lovell-Sauerland and.lssociates Van's Auto Repair Draina�e Report Februan�,2009 LSA��102 I31dK Pcrmit#B-080342 Appendiz LOVELL-SAUERLAND&ASSOCIATES,INC. 19217 36th W.,Suite 106 Lynnwood, K'A 98036 Van's Auto Repair As-built Detention Calculations Purpose: These calculations are based on the LSA field-surveyed information for the wet-tank and control structure. The information was input into the same program used for the approved design (KCRTS 6.0) and the results were compared to the approved values. As-built Developed Land Use . _�_.. _. . . _ . - � � -- � ? 4 ¢� ����a,u� QfEB � _ . ._ _ _.. _.�. � Till Forest 0.00 acres Till Pasture 0.00 acres Till Grass �.00 acres Outwash Forest 0.00 acres Ouiwash Pasture 0.00 acres Ouiwash Grass 0.00 acres Wetland 0.00 acres Impervious 0.19 acres Total U.19 acres , Scale Factar : 1.00 Hourly Reduced Time Series: de�-st-ab� » Compute Time Series Modify User Input File for computed Time Series [.TSF] The as-built land use summary differs from the design land-use summary. The as-built area only includes the same 0.19-acre of impervious area, but the 0.6-acre of frontage impervious was not required to be directed to the tank. This revision had been made through City approved Construction Change. 5102-ab-ta nk-ca Ics.docx As-built Developed Design Storm Events Peaks Flow Frequency Analysis Time Series File:dev-st-ab.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) Period 0.046 7 2/09/Ol 2:00 0.090 1 100.00 0.990 0.040 8 1/OS/02 16:00 0. 069 2 25.00 0. 960 0.056 3 12/08/02 18:00 0. 056 3 10.00 0.900 0.047 6 8/26/04 2:00 0.056 4 5.00 0.800 0.056 4 10/28/09 16:00 0.049 5 3.00 0. 667 0.099 5 1/18/06 16:00 0. 047 6 2.00 0.500 0.069 2 10/26/06 0:00 0.046 7 1.30 0.231 0.090 1 1/09/08 6:00 0.040 8 1. 10 0.091 Computed Peaks 0.083 50.00 0. 980 Chart #1-Storm Runoff Peaks: Comparing predeveloped peaks to controlled-release peaks from the as-built tank � Relm Period 2 5 10 20 50 �00 o rtlat-si.pks m Se�Teci � � P�'etlE��.PkS J . / ♦�}'. ` ��~ ;t✓r �' �� � ��� . .�'�'f / y t R J � �� � � U ♦ s m �' 10' a � ,� o 0 � 0 . �� . � o ^ �^ . ,,.�,_ `,� �� � � ��1 . 0 0 �. �._ r�,l�-{ ��. , �� �-:�-. ,o- 1 2 5 70 20 30 10 50 BO 70 80 90 95 88 99 Cumula�v@ Pfobebdaqr 5102-a b-tank-ca I�s.docx Chart #2-Durations: Comparing predeveloped durations to controlled-release durations from the as-built tank �: N 0 o � fdOUf-S[.OUf o � ,._ t�€cr�n-i.d_r e 0 � ; !�{ �--i "`� r`r o ' ,� -r ��,`��t'�'�lqt� O � k � � �7��l� � 0 � o �} v ����js m o � o a p� i $ /T+=''�!L 1 e.-� 0 0 o � r � 0 0 0 00 0 0 0 0 0 o � �O�S 10� 10-3 10�� 10 � 10� Probebilld 6aCee�lenCe Duration Comparison Anaylsis Results for above chart Base File: predev-st.tsf New File: rdout-st.tsf Cutoff Units: Discharge in CFS -----Fraction of Time----- ---------Check of Tolerance------- Cutoff Base New %Change Probability Base New oChange 0.003 � O. 10E-01 0.23E-03 -97.7 I O. 10E-01 0.003 0.003 -13.7 0.004 � 0.73E-02 0.21E-03 -97 .1 � 0.73E-02 0.004 0.003 -22.5 0.004 � 0. 65E-02 0.20E-03 -97.0 I 0. 65E-02 0.004 0.003 -29.7 0.005 I 0.59E-02 0. 18E-03 -97.0 I 0.59E-02 0.005 0.003 -35.7 0.005 I 0.54E-02 0. 16E-03 -97.0 I 0.54E-02 0.005 0.003 -40.8 0.005 � 0.45E-02 0. 15E-03 -96.8 I 0.45E-02 0.005 0.003 -45 .1 0.006 I 0.41E-02 0.13E-03 -96.8 � 0.41E-02 0.006 0. 003 -48.9 ', 0.006 I 0. 38E-02 0.13E-03 -96.5 � 0. 38E-02 0.006 0.003 -52.1 i 0.007 I 0. 34E-02 0.13E-03 -96.1 � 0. 34E-02 0.007 0.003 -55.0 0.007 I 0.29E-02 0. 98E-09 -96.6 � 0.29E-02 0.007 0.003 -57.5 0. 008 I 0.27E-02 0.33E-04 -98.8 I 0.27E-02 0. 008 0.003 -59.8 0.008 I 0.24E-02 O.00E+00 -100.0 I 0.24E-02 0.008 0.003 -61.8 0.008 I 0.22E-02 O.00E+00 -100.0 � 0.22E-02 0.008 0.003 -63.7 0.009 � 0. 17E-02 O.00E+00 -100.0 I 0. 17E-02 0.009 0.003 -65.4 0.009 I 0. 15E-02 O.00E+00 -100.0 � 0. 15E-02 0. 009 0.003 -66.9 5102-ab-ta nk-calcs.docx 0. 010 � 0. 14E-02 O.00E+00 -100.0 I 0. 14E-02 0. 010 0.003 -68. 3 0.010 I 0. 99E-03 O.00E+00 -100.0 I 0. 99E-03 0.010 0.003 -69.6 0.010 I 0.83E-03 O.00E+00 -100.0 I 0.83E-03 0. 010 0.003 -70.7 0.011 I 0.72E-03 O.00E+00 -100.0 I 0.72E-03 0. 011 0.003 -71.8 0.011 I 0. 64E-03 O.00E+00 -100.0 I 0.64E-03 0.011 0.003 -72. 9 0.012 � 0.38E-03 O.00E+00 -100.0 � 0. 38E-03 0.012 0.003 -73.8 0.012 � 0.33E-03 O.00E+00 -100.0 � 0.33E-03 0.012 0. 003 -79.7 0.012 � 0.29E-03 O.00E+00 -100.0 � 0.29E-03 0.012 0. 003 -75.5 0.013 I 0.28E-03 O.00E+00 -100.0 � 0.28E-03 0.013 0.003 -76.3 0.013 I 0.21E-03 O.00E+00 -100.0 � 0.21E-03 0. 013 0.009 -69.5 0.014 I 0. 18E-03 O.00E+00 -100.0 I 0. 18E-03 0. 014 0.005 -62.6 0.014 � 0. 15E-03 O.00E+00 -100.0 I 0.15E-03 0.014 0.006 -59.7 0.014 � 0. 15E-03 O.00E+00 -100.0 � 0. 15E-03 0.014 0.006 -60. 9 0. 015 � 0.82E-04 O.00E+00 -100.0 I 0.82E-04 0.015 0.007 -50.5 0.015 � 0.65E-04 O.00E+00 -100.0 I 0.65E-04 0. 015 0.007 -51.3 0.016 I 0. 16E-04 O.00E+00 -100.0 � 0.16E-04 0.016 0.008 -51.3 0.016 � 0. 16E-04 O.00E+00 -100. 0 I 0. 16E-04 0. 016 0. 008 -52.5 r�1_ There is no positive excursionr; Q--�_.�_.:�.,_.-�.��'�,�_.�__ Maximum negative excursion = 0. 010 cfs (-76.30) occurring at 0.013 cfs on the Base Data:predev-st.tsf and at 0.003 cfs on the New Data:rdout-st.tsf As-Built Detention Facility Data Type of Facility: Detention Tank Tank Diameter: 6.00 ft Tank Length: 208.00 ft Effective Storage Depth: 4.04 ft Stage 0 Elevation: 399. 58 ft Storage Volume: 4212. cu. ft Riser Head: 4.04 ft Riser Diameter: 12. 00 inches Number of orifices: 2 Full Head Pipe Orifice # Height Diameter Discharge Diameter (ft} (in) (CFS) (in) 1 0.00 0.26 0.004 2 3.32 0.75 0.013 4 .0 Top Notch Weir: None Outflow Rating Curve: None Stage Elevation Storage Discharge Percolation (ft) (ft) (cu. ft) (ac-ft) (cfs) (cfs) 0.00 399.58 0. 0.000 0.000 0.00 0.01 399.59 12. 0.000 0.000 0.00 0.02 399.60 23. 0.001 0.000 0.00 0. 12 399.70 142. 0.003 0.001 0.00 0.22 399.80 261. 0.006 0.001 0.00 0.32 399.90 382. 0.009 0.001 0.00 0.42 400.00 503. 0.012 0.001 0.00 5102-a b-tank-calcs.docx � / 0.52 400.10 626. 0.014 0. 001 0. 00 0. 62 400.20 749. 0.017 0. 001 0. 00 0.72 400.30 873. 0.020 0. 002 0. 00 0.82 400.40 997. 0.023 0. 002 0. 00 0. 92 400.50 1122. 0.026 0. 002 0.00 1.02 400.60 1247. 0.029 0.002 0. 00 I�I 1. 12 400.70 1371. 0.031 0. 002 0.00 � 1.22 400.80 1496. 0.034 0.002 0.00 1.32 400.90 1620. 0.037 0.002 0.00 1. 42 401.00 1744. 0.040 0.002 0.00 1. 52 401.10 1868. 0.043 0. 002 0.00 1. 62 401.20 1991. 0.046 0.002 0.00 1.72 401.30 2113. 0.049 0.002 0. 00 1.82 901.40 2234. 0.051 0.002 0. 00 1. 92 401.50 2354. 0.054 0.002 0. 00 2.02 901.60 2472. 0.057 0.003 0.00 2. 12 901.70 2590. 0.059 0.003 0.00 2 .22 401.80 2705. 0.062 0.003 0.00 2. 32 401.90 2819. 0.065 0.003 0.00 2. 42 402.00 2931. 0.067 0.003 0.00 2.52 402.10 3041. 0.070 0.003 0.00 2. 62 402.20 3148. 0.072 0.003 0.00 2.72 402.30 3253. 0.075 0.003 0.00 2.82 402.40 3355. 0.077 0.003 0.00 2. 92 402.50 3954. 0.079 0.003 0.00 3.02 402.60 3549. 0.081 0.003 0.00 3. 12 402.70 3641. 0.084 0.003 0. 00 3.22 402.80 3729. 0.086 0.003 0.00 3. 32 402.90 3812. 0.088 0.003 0.00 3. 33 402.91 3820. 0.088 0.003 0.00 3. 34 402. 92 3828. 0.088 0.004 0.00 3. 35 402. 93 3836. 0.088 0.005 0.00 3. 36 402.94 3844. 0.088 0.006 0.00 3.37 402.95 3852. 0.088 0.007 0.00 3.38 402. 96 3860. 0.089 0.007 0.00 3. 48 403.06 3935. 0.090 0.009 0.00 3.58 403.16 4005. 0.092 0.011 0.00 3. 68 403.26 4068. 0.093 0.013 0.00 3.78 403.36 4123. 0.095 0.014 0.00 3. 88 403.46 4169. 0.096 0.015 0.00 3. 98 403.56 4202. 0.096 0.016 0.00 4 .04 403.62 4212. 0.097 0.017 0.00 4 . 14 403.72 4212. 0.097 0.325 0.00 4 . 24 403.82 4212. 0.097 0.889 0.00 4 . 34 403.92 9212. 0.097 1.620 0.00 4 . 44 404.02 4212. 0.097 2 .410 0.00 4. 54 404.12 4212. 0.097 2 .690 0.00 4. 64 404.22 4212. 0.097 2 .950 0.00 4.74 404.32 4212. 0.097 3.190 0.00 4 . 84 404.42 4212. 0.097 3. 410 0.00 9 . 94 404.52 4212. 0.097 3. 610 0.00 5.04 404.62 4212. 0.097 3.810 0.00 5. 14 404.72 4212. 0.097 3. 990 0.00 5. 24 404.82 4212. 0.097 4. 170 0.00 5102-ab-tank-ca Ics.docx r 5. 34 404 .92 4212. 0.097 4 .340 0.00 5. 44 405.02 4212. 0.097 4 .500 0.00 5.54 905. 12 4212. 0.097 4 . 660 0.00 5. 64 905.22 4212. 0.097 4 .810 0.00 5. 74 405.32 9212. 0.097 4. 960 0.00 5.84 405.42 9212. 0.097 5.100 0.00 5. 94 405.52 4212. 0.097 5.240 0.00 6. 04 405. 62 4212. 0.097 5.380 0.00 Hyd Inflow Outflow Peak Storage Target Calc Stage Elev (Cu-Ft) (Ac-Ft) 1 0.05 0.02 0.01 3.41 402. 99 3883. 0.089 2 0.09 ******* 0.01 3. 36 402. 94 3842. 0.088 3 0.06 ******* 0. 00 3.27 402.85 3772. 0.087 4 0.07 ******* 0. 00 2. 63 402.21 3154. 0.072 5 0.05 ******* 0.00 2. 14 401.72 2610. 0.060 6 0.04 ******* 0.00 2.00 401. 58 2445. 0.056 7 0.06 ******* 0.00 1. 93 401. 51 2367. 0.054 8 0.05 ******* 0.00 1.30 900.88 1599. 0.037 5102-a b-ta n k-ca Ics.d ocx CAST FRAME IN LID /(DUE TO COVER) RIM=405.70 '�05.48�A8� � BOTTOM OF LID=405.0 6 ELEV. 404.50 �03.1o2(AS� � � � r "(AB) 402.4o(Ae) ` '� N 4o2.qo(A�) ELEV. 403.90 � , ; ELEV. 403.90 1 � 3" 1y (��) 4.o4'(AS) 3/4r YI A. ORIFlCE�2 4.15' 3.32�(AP�) (A�) ELEV. 399.75 399.58{A�) � w � � BOTTOM OF RISER SUBM£RG£D-- (AS) SIZ£YER GONTRAGTUR t- � 6" REMOVABLE CIRCULAR MESH CAGE 17/64` OIA. ORIFlCE�1 �PROVIDE MESH CAGE PROTECTION / SINCE BOTTOM ORIFICE IS <0.5". BOLT REMOVABLE MESH CAGE TO RISER WITH ATTACHED BOLT—ON BANDED COUPLING. RESTRICTOR OETAIL MESH OR SOLID BOTTOM CAGE TO BE MADE NFlTH 1/4" MESH SCREEN IN ALUMINUN OR STAINLESS STEEL. NO SCALE SMALL ORIFlCE SCREEN DETAIL NO SCALE (KCSWDM FIG. 5.3.4.A) � 410 - ___ --- T _ _. _ . -_ _- 2+129�T�+�u�� I 1+82.82»1.7 AB) W/SOLID LID ACCESS RISER RIMati99.'�� �. -- -- ---- � 1+03.5; 27.2' AB) SEE DETAIL. ��a�� — W SO�ID LID 408.82 AB) 6"SSCO; INV=397.93 INV= � roPsaea�4os.92(�e) 4oa� �- (�err � i r-� i � i � 405 - ---� - I 1 — --- -_._ i i �� � � � � '� : i i ii i � � � \ TANK CROWN dc � i i 1001R EL.�403.50 ���\� � i i � 72" X 16GA. 5 X 1 AS HALT �� \ � j \ COATED 24" WIDE ROD � � �� � i � LUG BANDS, 1"THK GAS ETS � ����\� �AB� � � � �4'»�YcP�;S�OJ97i(AB p3•���`� DELETED PER ; ; io'�i2"s� � ���Z ,:` ����"3 ^ \ DELETED P R \ APPROVED C NGE i i � ���:�\�` CB(/5 �E 1 AT � � s-o.2oz(�ej � � ����` APPROVED CHANG STD#B01 P.) i i C8�2 10 C9/i � �\\�� RIM-40 0 � i 400 �� � � �\�\\ \ i ---- INV= 3.00 8"0 -N _ i i� � i i j j LIVE/DEAD�3P9:1�39D.'�D(AB) i i �� i i \ � � � 1't3fi"CMP• S=0A7 i i � INV- . 399.13(AB 2EA.�100' PARALLEL LENGTHS - 20 ' TOTAL � i i � TANK IN = 397.90(A8) i �: 1��66-�a�2235RT � �\INV=397.00(6"IN-S)(NEW) CB 2�T1PE 1 GRATED 1+08.88;22.2 (AB) i i . STD;yB012 TYP. RIM�404.21 A8 i � RECHANNEL. RIM-�II�.6A� INV�399.47 12 CPEP�IN-SEXAB) ii WITHAINSIDE MHE DROP PER 1+11.46�7.9'RT(AB) _ ' -N INV�399. 12 CPEP�OUT-N)(AB) C.O.R. STD�y8075-1. CB 3�54 TYPE-2 SOLID LID ' - i i i RESTORE EX. PCC 395 ----- — i �� � PAVEMENT 2.53(8" ) INV 399.13(38�CMP�IN-S AB ER C.O.R. STD�FI033 INV-3 "N-S) INV 402.33(B��IN-SYY)(11B) ' �, 99.28(12"0 INV 399.Sd(12'CPEP�WT-NN�(AB) RI TOP�403.62(AB) ��� STORM DR' IN 8c SIDE EWER PROFI � E � , ;i i ^ " ^"-"•�_ SCALE: H: 1" 20' V: 1"=2' , �i�i C8�1�TYPE 1(GRATED) p+96.2E; 7'RT(A8) ii i i STDjy8012 (TYP.) RIM�403.�9(AB) �i i i SET�OVE_.R��EX. SD INV�3�9.�,h-(12'CPFP�IN-Ed�S)(AB) i i i i INV-399.J�D-(12'CPEP�OUT-1A�(AB) �iii _ . � � EX. M.H. _ _ __ --- -----_ . _ _ _- --- __ - �. .__ TOP 405.61 1+00 2+00 3+00 INV 379.31�18"E INV 379.21�18"W �J