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Report (709) v — 00)-63 k ot�� / 3S kid Drainage Report May 15, 2000 72" Street Office Building Prepared For Pacific Northwest Properties 9965 S.W. Allen Blvd. Suite 115 Beaverton, Oregon 97005 : ; `''qty 0,7 Prepared By ate WRG Design 10450 SW Nimbus Ave, Suite RA Portland, Oregon 97223 WRG PROJECT NO. MDG023 Table of Contents Description Narrative Water Works — Detention Calculations Appendix A - Basin Map Appendix B - Existing Topography Appendix C - Supporting Data Appendix D - Detention Calculations 2 1 DRAINAGE REPORT FOR 72 " Street Office Building Tigard, Oregon May 15, 2000 A. Purpose: The storm drainage system has been designed based on the requirements of the City of Tigard and is submitted for preliminary review by the City of Tigard. The site size is 2.49 acres and is located North of Cherry Street and West of 72n Avenue. The applicant is proposing to develop the site into a commercial building with approximately 27% of the site to be landscaped. The site currently is covered in grass. The existing slopes of the site range from 4 % -7 %. 1. Conveyance Assumptions The Rational Method will be used to develop the basin flows. Runoff coefficients were found using the following variables: Hydrologic SCS Group Type C Pre - Developed: Developed: Pervious C =0.25 Pervious C =0.25 Impervious C =0.90 Impervious C =0.90 Mannings N = 0.013 2. Conveyance System Calculations Appendix A shows the basins used for design of the 10 -year conveyance system. Appendix B shows the results of our calculations for the on -site 10 -year conveyance system. The Rational Method was utilized to calculate the peak flow (10 -year storm) in order to size the storm pipes using Mannings equation. The storm connection was sized as a 18" pipe. An initial time of concentration of 5.00 minutes was used. 3. Water Quality Calculations Stormwater Management shall accomplish Water Quality in a 6' x 8' compost filter. This system is currently being used throughout the Portland Metro area and meets all City water quality requirements. See attached details in the Supporting Data. 1 7 j 4. Water Quantity Calculations The detention facility as shown on the north side of Cherry Street was designed using Water Works hydrology software for storm event routing. A multi- orifice outlet structure will limit the post - development runoff from the above storm events to that of the pre - development runoff. The outlet structure has been designed per the City of Tigard Stormwater Detention requirements for the 2 through 25 -year storm event. 2 SUPPORTING DATA 5 72nd Street Office Building 10 -Year Pipe Sizing for Conveyance System 15- May -00 PACIFIC NORTHWEST PROPERTIES DESIGN SECTION DESIGN CALCULATIONS DESIGN INVERT CO TO CO Inc. Total Inten- Inc. Weighted INC. TOT Pipe Full Travel ELEVATIONS Drainage Tc Time sity Area "C" CwA Total Runoff Runoff Slope Dia. Capacity Vel. % Length Time Areas (min) (min) (in/hr) (ac) (Cw) CwA (cfs) (cfs) % (in) (cfs) (fps) Full (ft) (min) UPPER LOWER CO #1 -MH #3 BASIN 1,2,3,4 5.00 3.00 0.90 0.71 0.64 0.64 1.92 1.92 0.50 12 2.52 3.48 76 212.5 1.02 223.40 222.34 MH #3 -MH #2 NO BASIN 0.30 5.30 2.92 0.00 0.00 0.00 0.00 0.00 1.92 4.21 12 7.31 10.11 26 181.0 0.30 222.34 214.72 MH #2 - MH #1 WEST BLDG 0.47 5.77 2.86 0.27 0.90 0.24 0.24 0.69 2.62 0.49 15 4.51 4.00 58 112.6 0.47 214.72 214.17 MH #1 - 60" MH BASIN 5 0.33 6.10 2.58 0.16 0.82 0.13 0.13 0.34 4.02 0.50 15 4.56 4.04 88 81.1 0.33 214.17 213.76 CO#2 - MH #1 BASIN 6 5.00 3.00 0.44 0.81 0.36 0.36 1.07 1.07 7.75 8 3.36 10.47 32 68.8 0.11 219.50 214.17 EAST BLDG 60" MH2 -ROW 5.00 3.00 0.00 0.00 0.00 0.00 0.00 4.56 0.39 18 6.52 4.01 70 25.9 0.11 206.56 206.46 BASIN FLOW COMBINED 5.00 3.00 0.25 0.72 0.18 0.18 0.54 0.54 CB#8 AND #7 FLOW C" VALUES ARE WEIGHTED AVERAGES MANNINGS "N" = 0.013 STORMWAER MANAGEMENT PROJECT INFORMATION SHEET #1 72ND OFFICE BUILDING PRECAST STORMFILTEW DATA DESIGN WATER QUALITY FLOW (cfs) 0.16 PEAK FLOW (cfs) 4.00 RETURN PERIOD OF PEAK FLOW (yrs) 10 RADIAL FLOW CARTRIDGES REQUIRED 9 PRECAST STORMFILTER SIZE 6 x 8 (In— Out) =2.3' Min. I.E. MATERIAL DIAMETER INLET PIPE #1 213.04 HDPE 8" INLET PIPE #2 INLET PIPE #3 OUTLET PIPE 210.71 HDPE 8" RIM ELEVATION(S): 1 = 217.12 4 = 217.35 1 \ / i0W 4 NORTH 2 ~ 3 2 = 216.98 / \3 = 217.21 ADJUSTABLE LID YES DOOR OPENING DIRECTION: (FACING DOWNSTREAM — SEE FIGURE ABOVE EXAMPLE: '2 TO 1' OR '1 TO 2.' 2' TO 1' USE 'N /A' FOR METAL GRATE). H -20 TRAFFIC RATED LID NO LADDER YES ANTI — FLOATATION BALLAST WIDTH HEIGHT (USE N/A IF NOT REQUIRED) N/A N/A Q (treat) = 0.16 CFS FROM WATERWORKS CARTRIDGES = 0.16 (449/15) = 5 CARTRIDGES 5 CARTRIDGES = 6 x 8 PRECAST VAULT 1 , GENERAL NOTES: The STORMWATER MANAGEMENT 1.) STORMFILTER BY STORMWATER MANAGEMENT, PORTLAND, OREGON (503- 240 - 3393). E U.S. PATENT NT N No. o. 5.322.829. 2.) ALL STORMFILTERS REQUIRE REGULAR MAINTENANCE. REFER TO OPERATION AND MAINTENANCE MANUAL FOR No. 5,624,576, AND OTHER U.S. DETAILS. AND FOREIGN PATENTS PENDING 3.) PRECAST CONCRETE VAULT CONSTRUCTED IN ACCORDANCE WITH ASTM C858. 4.) EXTERNAL PIPING AND COUPLINGS PROVIDED BY OTHERS. 5.) FLEXIBLE COUPLINGS TO BE SET 18' OUTSIDE FACE OF WALL. FERNCO OR ENGINEER APPROVED. 6.) SEE PRECAST STORMFILTER DATA SHEET FOR VAULT DIMENSIONS, ELEVATIONS AND NUMBER OF CARTRIDGES. 7.) ANTI - FLOATATION BALLAST TO BE SET ALONG ENTIRE LENGTH OF BOTH SIDES OF FILTER AS SHOWN. SEE PRECAST FILTER DATA BLOCK FOR BALLAST WIDTH AND HEIGHT DIMENSIONS. ANTI - FLOATATION BALLAST ••• ALTERNATE PIPE IF FIVE OR LESS CARTRIDGES (BY OTHERS) PRE -CAST / /L ALTERNATE CONCRETE VAULT (-• - . < • a ENERGY DISSIPATER • • a - • E-1' i A A • OUTLET • r �� /a .. ,, / /,. _ . BAY / /• i::== . `_ . ' •1111E11�II %/ /III / /il�ll % / /.;,I Y;� ;:;; If.' - 2' • L. � 1 X 2' SUMP 6 I IIIIIIIIIiII INLET PIPE I ` I L- Illlllllllll 11 ;1 _ (BY OTHERS) L ' 6' II LADDER (TYP) O il \ OUTLET PIPE (BY OTHERS) • L • - i i ! i /i� /2-7,-;;;;„ FLEXIBLE COUPLING =117 All iiu:ForfAll • ::=n ..-2.— ��j - j/ • ENERGY DISSIPATER (TYP) • • • a . •a PIPE MANIFOLD (TYP) RADIAL FLOW CARTRIDGE (TYP) 6'x8' PRECAST STORMFILTER' PLAN VIEW ,4110 SCALE: N.T.S 2 - 3'x3' DIAMOND PLATE DOORS (TYP) TRAFFIC BEARING LID (TYP) filifflil I I se 6' 9�� JOINT OVERFLOW II SEALANT (TYP) FLOW SPREADER ROUTES LADDER (TYP) 14,_ . RADIAL FLO - III -TRIDGE FLOW RESTRICTOR 4.5' • = = DISC (TYP) MINIMUM % V ' r % ® % /�% %' : 1111 �` NOTE I.E. IN - I.E. OUT 2.3' MIN. III 1 _ , , ...,.i PIPE yy” �1:.I MANIFOLD (TYP) t ' C� �.'��: C ' INTERIOR WALL (TYP) - 6'x8' PRECAST STORMFILTER SECTION A —A 0 SCALE: N.T.S GENERAL NOTES: HAP Storrenfter LIGOONT 1.) STORMFILTER BY STORUWATER MANAGEMENT, PORTLAND. OREGON (503- 240- 3393). Na LI MA70, AIM 0TH U.S. 2.) ALL STORMFILTERS REQUIRE REGULAR MAINTENANCE. REFER TO OPERATION AND AND ►OPCGN POINTS PINAM0 MAINTENANCE LUNUAL FOR DETAILS. 3.) EXTERNAL PIPING AND COUPUNGS PRONGED BY OTHERS. 4.) FLEXIBLE COUPUNG TO BE ATTACHED TO OUTLET. FERNCO OR ENGINEER APPROIED. 1 DETENTION CALCULATIONS WATERWORKS MAY 15, 2000 6 1 1 5/17/00 3:23:50 pm WRG Design Inc. page 21 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL LEVEL POOL TABLE SUMMARY MATCH INFLOW -STO- -DIS- <- PEAK -> STORAGE fecs < DESCRIPTION > (cfs) (cfs) - -id- - -id- <-STAGE> id VOL (cf) 0(,vK_,fS) DETENTION CALCS 0.56 1.18 ONE ORIFICE 208.79 2 1687.03 cf 0. SC 0.84 1.52 ONE ORIFICE 209.38 3 2294.98 cf , 8i1 1.00 1.72 ONE ORIFICE 209.78 4 2685.00 cf 0.15 1.22 1.98 ONE ORIFICE 210.52 5 3231.05 cf I - I 2 '5/17/00 3:23:48 pm WRG Design Inc. page 1 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL BASIN SUMMARY BASIN ID: 10YRPOST NAME: 10YR -POST EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION 3.45 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.72 cfs VOL: 0.59 Ac -ft TIME: 500 min BASIN ID: 10YRPRE NAME: 10 -PRE EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION 3.45 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC • 31.41 min 31.41 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0200 PEAK RATE: 1.00 cfs VOL: 0.41 Ac -ft TIME: 520 min BASIN ID: 25YRPOST NAME: 25 -POST EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION 3.90 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.98 cfs VOL: 0.67 Ac -ft TIME: 500 min 5/17/00 3:23:48 pm WRG Design Inc. page 2 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL BASIN SUMMARY BASIN ID: 25YRPRE NAME: 25 -PRE EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION • 3.90 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC • 31.40 min 31.40 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.22 cfs VOL: 0.49 Ac -ft TIME: 520 min BASIN ID: 2YRPOST NAME: 2 -POST EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION 2.50 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL • 10.00 min CN • 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.18 cfs VOL: 0.40 Ac -ft TIME: 500 min BASIN ID: 2YRPRE NAME: 2 -PRER EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION • 2.50 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC • 31.40 min 31.40 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 0.56 cfs VOL: 0.25 Ac -ft TIME: 520 min 5/17/00 3:23:48 pm WRG Design Inc. page 3 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL BASIN SUMMARY BASIN ID: 5YRPOST NAME: 5 -POST EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION 3.10 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.52 cfs VOL: 0.52 Ac -ft TIME: 500 min BASIN ID: SYRPRE NAME: 5 -PRER EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION 3.10 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC • 31.40 min 31.40 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 0.84 cfs VOL: 0.35 Ac -ft TIME: 520 min 5/17/00 3:23:48 pm WRG Design Inc. page 4 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 10YRPOST NAME: 10YR -POST EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION • 3.45 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.72 cfs VOL: 0.59 Ac -ft TIME: 500 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.2556 610 0.4272 910 0.2590 1210 0.1957 1510 20 320 0.2572 620 0.4251 920 0.2582 1220 0.1958 1520 30 330 0.2576 630 0.4248 930 0.2582 1230 0.1958 1530 40 340 0.2917 640 0.3816 940 0.2586 1240 0.1959 1540 50 350 0.2934 650 0.3795 950 0.2586 1250 0.1959 1550 60 0.0002 360 0.2938 660 0.3792 960 0.2584 1260 0.1959 1560 70 0.0180 370 0.3285 670 0.3505 970 0.2435 1270 0.1960 1570 80 0.0189 380 0.3302 680 0.3491 980 0.2428 1280 0.1960 1580 90 0.0195 390 0.3308 690 0.3489 990 0.2428 1290 0.1960 1590 100 0.0674 400 0.3919 700 0.3349 1000 0.2430 1300 0.1962 1600 110 0.0698 410 0.3950 710 0.3342 1010 0.2431 1310 0.1962 1610 120 0.0702 420 0.3957 720 0.3340 1020 0.2431 1320 0.1962 1620 130 0.1068 430 0.4861 730 0.3198 1030 0.2433 1330 0.1963 1630 140 0.1086 440 0.4905 740 0.3191 1040 0.2433 1340 0.1963 1640 150 0.1090 450 0.4916 750 0.3189 1050 0.2432 1350 0.1961 1650 160 0.1379 460 0.5993 760 0.3046 1060 0.2281 1360 0.1808 1660 170 0.1393 470 0.6046 770 0.3039 1070 0.2274 1370 0.1801 1670 180 0.1395 480 0.6169 780 0.3037 1080 0.2274 1380 0.1801 1680 190 0.1540 490 1.6674 790 0.2892 1090 0.2276 1390 0.1802 1690 200 0.1548 500 1.7190 800 0.2885 1100 0.2276 1400 0.1802 1700 210 0.1549 510 1.7087 810 0.2885 1110 0.2274 1410 0.1802 1710 220 0.1649 520 0.8864 820 0.2890 1120 0.2123 1420 0.1803 1720 230 0.1653 530 0.8457 830 0.2891 1130 0.2115 1430 0.1803 1730 240 0.1656 540 0.8431 840 0.2889 1140 0.2115 1440 0.1801 1740 250 0.1863 550 0.6326 850 0.2742 1150 0.2117 1450 0.0112 1750 260 0.1873 560 0.6221 860 0.2735 1160 0.2117 1460 1760 270 0.1877 570 0.6205 870 0.2735 1170 0.2115 1470 1770 280 0.2202 580 0.4771 880 0.2739 1180 0.1964 1480 1780 290 0.2218 590 0.4700 890 0.2740 1190 0.1956 1490 1790 300 0.2222 600 0.4695 900 0.2738 1200 0.1956 1500 1800 ' ' 5/17/00 3:23:48 pm WRG Design Inc. page 5 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 10YRPRE NAME: 10 -PRE EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION 3.45 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC 31.41 min 31.41 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0200 PEAK RATE: 1.00 cfs VOL: 0.41 Ac -ft TIME: 520 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.0419 610 0.3758 910 0.2348 1210 0.1765 1510 20 320 0.0529 620 0.3592 920 0.2305 1220 0.1759 1520 30 330 0.0610 630 0.3483 930 0.2272 1230 0.1757 1530 40 340 0.0697 640 0.3390 940 0.2259 1240 0.1758 1540 50 350 0.0824 650 0.3258 950 0.2257 1250 0.1761 1550 60 360 0.0918 660 0.3162 960 0.2256 1260 0.1762 1560 70 370 0.1015 670 0.3086 970 0.2235 1270 0.1763 1570 80 380 0.1155 680 0.2991 980 0.2189 1280 0.1766 1580 90 390 0.1260 690 0.2924 990 0.2155 1290 0.1767 1590 100 400 0.1389 700 0.2881 1000 0.2142 1300 0.1768 1600 110 410 0.1589 710 0.2835 1010 0.2138 1310 0.1770 1610 120 420 0.1741 720 0.2803 1020 0.2138 1320 0.1772 1620 130 430 0.1930 730 0.2774 1030 0.2141 1330 0.1773 1630 140 440 0.2224 740 0.2732 1040 0.2145 1340 0.1775 1640 150 450 0.2444 750 0.2701 1050 0.2147 1350 0.1775 1650 160 460 0.2700 760 0.2670 1060 0.2125 1360 0.1751 1660 170 470 0.3083 770 0.2625 1070 0.2078 1370 0.1700 1670 180 480 0.3440 780 0.2593 1080 0.2042 1380 0.1662 1680 190 490 0.4922 790 0.2560 1090 0.2027 1390 0.1645 1690 200 500 0.7866 800 0.2513 1100 0.2023 1400 0.1639 1700 210 510 0.9968 810 0.2481 1110 0.2020 1410 0.1637 1710 220 0.0002 520 1.0022 820 0.2470 1120 0.1998 1420 0.1638 1720 230 0.0005 530 0.8581 830 0.2471 1130 0.1950 1430 0.1639 1730 240 0.0009 540 0.7345 840 0.2472 1140 0.1913 1440 0.1634 1740 250 0.0035 550 0.6459 850 0.2454 1150 0.1898 1450 0.1425 1750 260 0.0086 560 0.5638 860 0.2412 1160 0.1893 1460 0.0856 1760 270 0.0127 570 0.5108 870 0.2381 1170 0.1890 1470 0.0372 1770 280 0.0184 580 0.4736 880 0.2369 1180 0.1866 1480 0.0151 1780 290 0.0275 590 0.4269 890 0.2368 1190 0.1817 1490 0.0050 1790 300 0.0344 600 0.3940 900 0.2368 1200 0.1780 1500 0.0004 1800 1 1 1 5/17/00 3:23:48 pm WRG Design Inc. page 6 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 25YRPOST NAME: 25 -POST EVENT SCS METHODOLOGY TOTAL AREA ▪ 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION • 3.90 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.98 cfs VOL: 0.67 Ac -ft TIME: 500 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.2994 610 0.4883 910 0.2951 1210 0.2227 1510 20 320 0.3013 620 0.4859 920 0.2942 1220 0.2227 1520 30 330 0.3018 630 0.4855 930 0.2942 1230 0.2227 1530 40 340 0.3405 640 0.4360 940 0.2946 1240 0.2228 1540 50 350 0.3424 650 0.4335 950 0.2946 1250 0.2228 1550 60 0.0003 360 0.3429 660 0.4332 960 0.2944 1260 0.2228 1560 70 0.0284 370 0.3821 670 0.4002 970 0.2773 1270 0.2230 1570 80 0.0298 380 0.3841 680 0.3986 980 0.2765 1280 0.2230 1580 90 0.0305 390 0.3848 690 0.3984 990 0.2765 1290 0.2230 1590 100 0.0871 400 0.4547 700 0.3823 1000 0.2768 1300 0.2231 1600 110 0.0899 410 0.4581 710 0.3815 1010 0.2768 1310 0.2231 1610 120 0.0904 420 0.4590 720 0.3813 1020 0.2768 1320 0.2231 1620 130 0.1312 430 0.5624 730 0.3650 1030 0.2771 1330 0.2232 1630 140 0.1332 440 0.5675 740 0.3642 1040 0.2771 1340 0.2232 1640 150 0.1336 450 0.5688 750 0.3640 1050 0.2769 1350 0.2230 2650 160 0.1651 460 0.6916 760 0.3475 1060 0.2597 1360 0.2056 1660 170 0.1667 470 0.6977 770 0.3467 1070 0.2588 1370 0.2047 1670 180 0.1669 480 0.7119 780 0.3465 1080 0.2588 1380 0.2047 1680 190 0.1819 490 1.9170 790 0.3299 1090 0.2591 1390 0.2048 1690 200 0.1826 500 1.9762 800 0.3290 1100 0.2591 1400 0.2049 1700 210 0.1827 510 1.9644 810 0.3290 1110 0.2589 1410 0.2049 1710 220 0.1952 520 1.0163 820 0.3296 1120 0.2416 1420 0.2049 1720 230 0.1958 530 0.9693 830 0.3296 1130 0.2408 1430 0.2050 1730 240 0.1960 540 0.9663 840 0.3294 1140 0.2408 1440 0.2047 1740 250 0.2206 550 0.7242 850 0.3126 1150 0.2409 1450 0.0128 1750 260 0.2218 560 0.7122 860 0.3118 1160 0.2409 1460 1760 270 0.2222 570 0.7102 870 0.3118 1170 0.2407 1470 1770 280 0.2592 580 0.5457 880 0.3122 1180 0.2234 1480 1780 290 0.2610 590 0.5375 890 0.3122 1190 0.2226 1490 1790 300 0.2615 600 0.5370 900 0.3120 1200 0.2226 1500 1800 5/17/00 3:23:48 pm WRG Design Inc. page 7 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 25YRPRE NAME: 25 -PRE EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE TYPE1A PERV IMP PRECIPITATION • 3.90 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC 31.40 min 31.40 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.22 cfs VOL: 0.49 Ac -ft TIME: 520 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.0675 610 0.4460 910 0.2742 1210 0.2046 1510 20 320 0.0810 620 0.4258 920 0.2690 1220 0.2039 1520 30 330 0.0910 630 0.4125 930 0.2651 1230 0.2037 1530 40 340 0.1016 640 0.4012 940 0.2635 1240 0.2038 1540 50 350 0.1169 650 0.3851 950 0.2631 1250 0.2040 1550 60 360 0.1282 660 0.3735 960 0.2630 1260 0.2042 1560 70 370 0.1399 670 0.3642 970 0.2605 1270 0.2043 1570 80 380 0.1566 680 0.3527 980 0.2551 1280 0.2045 1580 90 390 0.1691 690 0.3447 990 0.2511 1290 0.2047 1590 100 400 0.1847 700 0.3394 1000 0.2494 1300 0.2048 1600 110 410 0.2088 710 0.3337 1010 0.2489 1310 0.2050 1610 120 420 0.2271 720 0.3298 1020 0.2489 1320 0.2051 1620 130 430 0.2498 730 0.3262 1030 0.2491 1330 0.2053 1630 140 440 0.2853 740 0.3211 1040 0.2496 1340 0.2055 1640 150 450 0.3118 750 0.3173 1050 0.2497 1350 0.2054 1650 160 460 0.3424 760 0.3135 1060 0.2471 1360 0.2026 1660 170 470 0.3879 770 0.3081 1070 0.2415 1370 0.1967 1670 180 480 0.4300 780 0.3041 1080 0.2374 1380 0.1922 1680 190 490 0.6092 790 0.3002 1090 0.2356 1390 0.1903 1690 200 500 0.9644 800 0.2946 1100 0.2350 1400 0.1895 1700 210 0.0002 510 1.2178 810 0.2906 1110 0.2347 1410 0.1892 1710 220 0.0020 520 1.2209 820 0.2893 1120 0.2320 1420 0.1893 1720 230 0.0058 530 1.0400 830 0.2893 1130 0.2264 1430 0.1895 1730 240 0.0089 540 0.8858 840 0.2893 1140 0.2221 1440 0.1887 1740 250 0.0143 550 0.7760 850 0.2871 1150 0.2203 1450 0.1626 1750 260 0.0232 560 0.6749 860 0.2821 1160 0.2197 1460 0.0959 1760 270 0.0300 570 0.6097 870 0.2783 1170 0.2193 1470 0.0416 1770 280 0.0378 580 0.5645 880 0.2769 1180 0.2166 1480 0.0167 1780 290 0.0495 590 0.5078 890 0.2766 1190 0.2108 1490 0.0054 1790 300 0.0582 600 0.4681 900 0.2765 1200 0.2065 1500 0.0003 1800 5/17/00 3:23:48 pm WRG Design Inc. page 8 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 2YRPOST NAME: 2 -POST EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION • 2.50 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC • 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.18 cfs VOL: 0.40 Ac -ft TIME: 500 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.1653 610 0.2985 910 0.1827 1210 0.1387 1510 20 320 0.1664 620 0.2970 920 0.1822 1220 0.1387 1520 30 330 0.1667 630 0.2968 930 0.1822 1230 0.1387 1530 40 340 0.1911 640 0.2670 940 0.1825 1240 0.1389 1540 50 350 0.1923 650 0.2655 950 0.1825 1250 0.1389 1550 60 360 0.1926 660 0.2653 960 0.1824 1260 0.1389 1560 70 0.0032 370 0.2174 670 0.2455 970 0.1720 1270 0.1390 1570 80 0.0034 380 0.2186 680 0.2446 980 0.1715 1280 0.1390 1580 90 0.0037 390 0.2191 690 0.2445 990 0.1715 1290 0.1390 1590 100 0.0303 400 0.2618 700 0.2349 1000 0.1717 1300 0.1392 1600 110 0.0316 410 0.2639 710 0.2344 1010 0.1718 1310 0.1392 1610 120 0.0320 420 0.2644 720 0.2343 1020 0.1718 1320 0.1392 1620 130 0.0584 430 0.3274 730 0.2246 1030 0.1720 1330 0.1393 1630 140 0.0597 440 0.3305 740 0.2241 1040 0.1721 1340 0.1393 1640 150 0.0600 450 0.3313 750 0.2240 1050 0.1720 1350 0.1392 1650 160 0.0820 460 0.4068 760 0.2141 1060 0.1614 1360 0.1284 1660 170 0.0831 470 0.4105 770 0.2136 1070 0.1608 1370 0.1278 1670 180 0.0832 480 0.4191 780 0.2135 1080 0.1608 1380 0.1278 1680 190 0.0962 490 1.1449 790 0.2034 1090 0.1611 1390 0.1279 1690 200 0.0968 500 1.1806 800 0.2029 1100 0.1611 1400 0.1279 1700 210 0.0969 510 1.1736 810 0.2030 1110 0.1609 1410 0.1279 1710 220 0.1060 520 0.6138 820 0.2035 1120 0.1503 1420 0.1280 1720 230 0.1065 530 0.5860 830 0.2035 1130 0.1498 1430 0.1280 1730 240 0.1066 540 0.5842 840 0.2034 1140 0.1498 1440 0.1279 1740 250 0.1202 550 0.4400 850 0.1932 1150 0.1500 1450 0.0080 1750 260 0.1209 560 0.4328 860 0.1927 1160 0.1500 1460 1760 270 0.1211 570 0.4316 870 0.1927 1170 0.1498 1470 1770 280 0.1412 580 0.3327 880 0.1931 1180 0.1391 1480 1780 290 0.1422 590 0.3277 890 0.1931 1190 0.1386 1490 1790 300 0.1425 600 0.3274 900 0.1930 1200 0.1386 1500 1800 / 1 1 6 5/17/00 3:23:48 pm WRG Design Inc. page 9 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 2YRPRE NAME: 2 -PRER EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION 2.50 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC 31.40 min 31.40 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 0.56 cfs VOL: 0.25 Ac -ft TIME: 520 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.0025 610 0.2304 910 0.1520 1210 0.1168 1510 20 320 0.0065 620 0.2212 920 0.1494 1220 0.1165 1520 30 330 0.0097 630 0.2152 930 0.1474 1230 0.1165 1530 40 340 0.0141 640 0.2100 940 0.1467 1240 0.1166 1540 50 350 0.0211 650 0.2024 950 0.1467 1250 0.1168 1550 60 360 0.0264 660 0.1970 960 0.1468 1260 0.1170 1560 70 370 0.0322 670 0.1926 970 0.1455 1270 0.1171 1570 80 380 0.0405 680 0.1872 980 0.1427 1280 0.1173 1580 90 390 0.0468 690 0.1834 990 0.1406 1290 0.1175 1590 100 400 0.0543 700 0.1811 1000 0.1398 1300 0.1176 1600 110 410 0.0658 710 0.1786 1010 0.1397 1310 0.1178 1610 120 420 0.0746 720 0.1769 1020 0.1398 1320 0.1180 1620 130 430 0.0855 730 0.1753 1030 0.1401 1330 0.1181 1630 140 440 0.1027 740 0.1730 1040 0.1405 1340 0.1183 1640 150 450 0.1156 750 0.1713 1050 0.1407 1350 0.1184 1650 160 460 0.1309 760 0.1696 1060 0.1394 1360 0.1168 1660 170 470 0.1541 770 0.1671 1070 0.1364 1370 0.1134 1670 180 480 0.1753 780 0.1652 1080 0.1342 1380 0.1109 1680 190 490 0.2618 790 0.1633 1090 0.1333 1390 0.1099 1690 200 500 0.4327 800 0.1607 1100 0.1331 1400 0.1095 1700 210 510 0.5550 810 0.1588 1110 0.1330 1410 0.1094 1710 220 520 0.5634 820 0.1583 1120 0.1316 1420 0.1095 1720 230 530 0.4906 830 0.1586 1130 0.1285 1430 0.1096 1730 240 540 0.4273 840 0.1588 1140 0.1262 1440 0.1092 1740 250 550 0.3803 850 0.1578 1150 0.1253 1450 0.0942 1750 260 560 0.3360 860 0.1554 1160 0.1250 1460 0.0555 1760 270 570 0.3072 870 0.1535 1170 0.1249 1470 0.0241 1770 280 0.0001 580 0.2863 880 0.1529 1180 0.1234 1480 0.0097 1780 290 0.0003 590 0.2596 890 0.1530 1190 0.1202 1490 0.0031 1790 300 0.0005 600 0.2407 900 0.1532 1200 0.1178 1500 0.0002 1800 L 1 1 . 5/17/00 3:23:48 pm WRG Design Inc. page 10 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 5YRPOST NAME: 5 -POST EVENT SCS METHODOLOGY TOTAL AREA • 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION 3.10 inches AREA..: 0.63 Acres 1.85 Acres TIME INTERVAL 10.00 min CN 86.00 98.00 TC 7.00 min 7.00 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 1.52 cfs VOL: 0.52 Ac -ft TIME: 500 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.2219 610 0.3797 910 0.2309 1210 0.1748 1510 20 320 0.2233 620 0.3779 920 0.2302 1220 0.1748 1520 30 330 0.2237 630 0.3776 930 0.2302 1230 0.1748 1530 40 340 0.2542 640 0.3393 940 0.2306 1240 0.1749 1540 50 350 0.2557 650 0.3375 950 0.2306 1250 0.1749 1550 60 0.0001 360 0.2561 660 0.3372 960 0.2304 1260 0.1749 1560 70 0.0113 370 0.2871 670 0.3118 970 0.2172 1270 0.1750 1570 80 0.0119 380 0.2887 680 0.3105 980 0.2165 1280 0.1751 1580 90 0.0124 390 0.2892 690 0.3104 990 0.2165 1290 0.1751 1590 100 0.0529 400 0.3436 700 0.2980 1000 0.2168 1300 0.1752 1600 110 0.0549 410 0.3462 710 0.2974 1010 0.2168 1310 0.1752 1610 120 0.0553 420 0.3469 720 0.2973 1020 0.2168 1320 0.1752 1620 130 0.0884 430 0.4272 730 0.2847 1030 0.2171 1330 0.1753 1630 140 0.0901 440 0.4311 740 0.2841 1040 0.2171 1340 0.1753 1640 150 0.0904 450 0.4321 750 0.2839 1050 0.2170 1350 0.1752 1650 160 0.1169 460 0.5279 760 0.2712 1060 0.2035 1360 0.1615 1660 170 0.1183 470 0.5326 770 0.2706 1070 0.2029 1370 0.1608 1670 180 0.1184 480 0.5436 780 0.2705 1080 0.2029 1380 0.1608 1680 190 0.1325 490 1.4740 790 0.2576 1090 0.2031 1390 0.1609 1690 200 0.1332 500 1.5197 800 0.2570 1100 0.2031 1400 0.1609 1700 210 0.1333 510 1.5107 810 0.2570 1110 0.2029 1410 0.1609 1710 220 0.1430 520 0.7857 820 0.2575 1120 0.1895 1420 0.1610 1720 230 0.1435 530 0.7498 830 0.2575 1130 0.1888 1430 0.1610 1730 -240 0.1436 540 0.7474 840 0.2574 1140 0.1888 1440 0.1609 1740 250 0.1604 550 0.5615 850 0.2444 1150 0.1890 1450 0.0100 1750 260 0.1613 560 0.5522 860 0.2437 1160 0.1890 1460 1760 270 0.1616 570 0.5507 870 0.2437 1170 0.1888 1470 1770 280 0.1903 580 0.4238 880 0.2442 1180 0.1753 1480 1780 290 0.1917 590 0.4175 890 0.2442 1190 0.1746 1490 1790 300 0.1920 600 0.4171 900 0.2440 1200 0.1746 1500 1800 1 . • L. 5/17/00 3:23:48 pm WRG Design Inc. page 11 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL BASIN SUMMARY BASIN ID: 5YRPRE NAME: 5 -PRER EVENT SCS METHODOLOGY TOTAL AREA 2.48 Acres BASEFLOWS: 0.00 cfs RAINFALL TYPE • TYPE1A PERV IMP PRECIPITATION • 3.10 inches AREA..: 2.48 Acres 0.00 Acres TIME INTERVAL 10.00 min CN • 86.00 98.00 TC 31.40 min 31.40 min ABSTRACTION COEFF: 0.20 TcReach - Sheet L: 300.00 ns:0.1500 p2yr: 2.50 s:0.0200 TcReach - Shallow L: 200.00 ks:5.00 s:0.0500 PEAK RATE: 0.84 cfs VOL: 0.35 Ac -ft TIME: 520 min TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 310 0.0241 610 0.3216 910 0.2043 1210 0.1545 1510 20 320 0.0332 620 0.3078 920 0.2005 1220 0.1540 1520 30 330 0.0399 630 0.2988 930 0.1977 1230 0.1539 1530 40 340 0.0471 640 0.2910 940 0.1967 1240 0.1540 1540 50 350 0.0578 650 0.2799 950 0.1965 1250 0.1542 1550 60 360 0.0656 660 0.2719 960 0.1965 1260 0.1544 1560 70 370 0.0739 670 0.2655 970 0.1947 1270 0.1545 1570 80 380 0.0858 680 0.2575 980 0.1908 1280 0.1548 1580 90 390 0.0947 690 0.2520 990 0.1879 1290 0.1549 1590 100 400 0.1056 700 0.2484 1000 0.1867 1300 0.1550 1600 110 410 0.1224 710 0.2446 1010 0.1865 1310 0.1552 1610 120 420 0.1352 720 0.2420 1020 0.1865 1320 0.1554 1620 130 430 0.1510 730 0.2395 1030 0.1868 1330 0.1555 1630 140 440 0.1759 740 0.2360 1040 0.1872 1340 0.1557 1640 150 450 0.1945 750 0.2335 1050 0.1874 1350 0.1558 1650 160 460 0.2163 760 0.2309 1060 0.1855 1360 0.1537 1660 170 470 0.2490 770 0.2272 1070 0.1814 1370 0.1492 1670 180 480 0.2790 780 0.2244 1080 0.1784 1380 0.1459 1680 190 490 0.4043 790 0.2217 1090 0.1771 1390 0.1444 1690 200 500 0.6523 800 0.2178 1100 0.1768 1400 0.1439 1700 210 510 0.8295 810 0.2150 1110 0.1766 1410 0.1437 1710 220 520 0.8362 820 0.2142 1120 0.1746 1420 0.1438 1720 230 530 0.7194 830 0.2144 1130 0.1705 1430 0.1439 1730 240 0.0001 540 0.6189 840 0.2145 1140 0.1673 1440 0.1434 1740 250 0.0007 550 0.5462 850 0.2130 1150 0.1660 1450 0.1236 1750 260 0.0019 560 0.4785 860 0.2095 1160 0.1656 1460 0.0728 1760 . 270 0.0030 570 0.4346 870 0.2068 1170 0.1654 1470 0.0316 1770 280 0.0064 580 0.4036 880 0.2059 1180 0.1633 1480 0.0127 1780 290 0.0130 590 0.3644 890 0.2059 1190 0.1591 1490 0.0041 1790 300 0.0181 600 0.3368 900 0.2059 1200 0.1559 1500 0.0002 1800 5/17/00 3:23:49 pm WRG Design Inc. page 12 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL HYDROGRAPH SUMMARY PEAK TIME VOLUME HYD RUNOFF OF OF Contrib NUM RATE PEAK HYDRO Area cfs min. cf \AcFt Acres 2 0.555 550 17542 cf 2.48 3 0.836 530 22563 cf 2.48 4 0.951 530 25521 cf 2.48 5 1.119 530 29359 cf 2.48 5/17/00 3:23:49 pm WRG Design Inc. page 13 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL HYDROGRAPH SUMMARY HYDROGRAPH No. 2 Peak runoff: 0.5552 cfs Total Vol: 0.40 ac -ft TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 410 0.2241 810 0.2147 1210 0.1387 1610 20 420 0.2384 820 0.2089 1220 0.1387 1620 30 430 0.2475 830 0.2061 1230 0.1388 1630 40 440 0.2604 840 0.2048 1240 0.1387 1640 50 450 0.2776 850 0.2041 1250 0.1389 1650 60 460 0.2890 860 0.2012 1260 0.1389 1660 70 470 0.3047 870 0.1971 1270 0.1389 1670 80 0.0032 480 0.3229 880 0.1949 1280 0.1390 1680 90 0.0034 490 0.3373 890 0.1939 1290 0.1390 1690 100 0.0037 500 0.3944 900 0.1935 1300 0.1390 1700 110 0.0303 510 0.4681 910 0.1933 1310 0.1391 1710 120 0.0316 520 0.5234 920 0.1906 1320 0.1392 1720 130 0.0320 530 0.5495 930 0.1866 1330 0.1392 1730 140 0.0584 540 0.5530 940 0.1844 1340 0.1392 1740 150 0.0597 550 0.5552 950 0.1834 1350 0.1393 1750 160 0.0600 560 0.5522 960 0.1830 1360 0.1393 1760 170 0.0816 570 0.5442 970 0.1827 1370 0.1291 1770 180 0.0834 580 0.5364 980 0.1778 1380 0.1272 1780 190 0.0829 590 0.5254 990 0.1716 1390 0.1284 1790 200 0.0957 600 0.5110 1000 0.1715 1400 0.1274 1800 210 0.0972 610 0.4971 1010 0.1716 1410 0.1284 1810 220 0.0965 620 0.4825 1020 0.1718 1420 0.1275 1820 230 0.1058 630 0.4672 1030 0.1718 1430 0.1284 1830 240 0.1067 640 0.4525 1040 0.1719 1440 0.1277 1840 250 0.1065 650 0.4369 1050 0.1720 1450 0.1282 1850 260 0.1196 660 0.4203 1060 0.1720 1460 0.0109 1860 270 0.1214 670 0.4043 1070 0.1665 1470 1870 280 0.1207 680 0.3877 1080 0.1610 1480 1880 290 0.1398 690 0.3706 1090 0.1608 1490 1890 300 0.1418 700 0.3541 1100 0.1610 1500 1900 310 0.1424 710 0.3379 1110 0.1611 1510 1910 320 0.1542 720 0.3217 1120 0.1610 1520 1920 330 0.1661 730 0.3063 1130 0.1555 1530 1930 340 0.1666 740 0.2916 1140 0.1499 1540 1940 350 0.1792 750 0.2772 1150 0.1498 1550 1950 360 0.1868 760 0.2641 1160 0.1499 1560 1960 370 0.1896 770 0.2521 1170 0.1500 1570 1970 380 0.1972 780 0.2401 1180 0.1499 1580 1980 390 0.2075 790 0.2303 1190 0.1443 1590 1990 400 0.2131 800 0.2222 1200 0.1385 1600 2000 5/17/00 3:23:49 pm WRG Design Inc. page 14 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL HYDROGRAPH SUMMARY HYDROGRAPH No. 3 Peak runoff: 0.8360 cfs Total Vol: 0.52 ac -ft TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 410 0.2798 810 0.3089 1210 0.1745 1610 20 420 0.2937 820 0.2995 1220 0.1747 1620 30 430 0.3038 830 0.2909 1230 0.1748 1630 40 440 0.3188 840 0.2838 1240 0.1748 1640 50 450 0.3362 850 0.2782 1250 0.1748 1650 60 460 0.3499 860 0.2722 1260 0.1749 1660 70 0.0001 470 0.3673 870 0.2647 1270 0.1749 1670 80 0.0113 480 0.3871 880 0.2591 1280 0.1750 1680 90 0.0119 490 0.4039 890 0.2551 1290 0.1751 1690 100 0.0124 500 0.4617 900 0.2522 1300 0.1751 1700 110 0.0529 510 0.5412 910 0.2500 1310 0.1751 1710 120 0.0549 520 0.7657 920 0.2467 1320 0.1752 1720 130 0.0553 530 0.8360 930 0.2408 1330 0.1752 1730 140 0.0876 540 0.8241 940 0.2369 1340 0.1753 1740 150 0.0907 550 0.8109 950 0.2345 1350 0.1753 1750 160 0.0898 560 0.7819 960 0.2330 1360 0.1752 1760 170 0.1159 570 0.7367 970 0.2321 1370 0.1682 1770 180 0.1191 580 0.6936 980 0.2290 1380 0.1610 1780 190 0.1177 590 0.6313 990 0.2245 1390 0.1608 1790 200 0.1324 600 0.5607 1000 0.2216 1400 0.1609 1800 210 0.1333 610 0.5471 1010 0.2197 1410 0.1609 1810 220 0.1332 620 0.5367 1020 0.2187 1420 0.1609 1820 230 0.1409 630 0.5254 1030 0.2180 1430 0.1610 1830 240 0.1433 640 0.5147 1040 0.2176 1440 0.1610 1840 250 0.1436 650 0.5029 1050 0.2174 1450 0.1610 1850 260 0.1522 660 0.4902 1060 0.2173 1460 0.0348 1860 270 0.1610 670 0.4779 1070 0.2140 1470 1870 280 0.1614 680 0.4650 1080 0.2087 1480 1880 290 0.1763 690 0.4516 1090 0.2058 1490 1890 300 0.1865 700 0.4387 1100 0.2044 1500 1900 310 0.1892 710 0.4259 1110 0.2038 1510 1910 320 0.1980 720 0.4131 1120 0.2034 1520 1920 330 0.2102 730 0.4007 1130 0.1998 1530 1930 340 0.2167 740 0.3884 1140 0.1945 1540 1940 350 0.2250 750 0.3762 1150 0.1917 1550 1950 360 0.2360 760 0.3646 1160 0.1903 1560 1960 370 0.2434 770 0.3529 1170 0.1896 1570 1970 380 0.2518 780 0.3415 1180 0.1893 1580 1980 390 0.2614 790 0.3305 1190 0.1857 1590 1990 400 0.2687 800 0.3201 1200 0.1786 1600 2000 f f 1 if 5/17/00 3:23:49 pm WRG Design Inc. page 15 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DETAIL HYDROGRAPH SUMMARY HYDROGRAPH No. 4 Peak runoff: 0.9506 cfs Total Vol: 0.59 ac -ft TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 410 0.3102 810 0.3584 1210 0.1989 1610 20 420 0.3244 820 0.3487 1220 0.1973 1620 30 430 0.3355 830 0.3403 1230 0.1965 1630 40 440 0.3508 840 0.3323 1240 0.1961 1640 50 450 0.3690 850 0.3255 1250 0.1960 1650 60 460 0.3839 860 0.3185 1260 0.1959 1660 70 0.0002 470 0.4021 870 0.3104 1270 0.1959 1670 80 0.0180 480 0.4227 880 0.3038 1280 0.1959 1680 90 0.0189 490 0.4408 890 0.2984 1290 0.1960 1690 100 0.0195 500 0.4996 900 0.2934 1300 0.1960 1700 110 0.0674 510 0.6884 910 0.2892 1310 0.1961 1710 120 0.0698 520 0.8852 920 0.2843 1320 0.1961 1720 130 0.0702 530 0.9506 930 0.2788 1330 0.1961 1730 140 0.1050 540 0.9374 940 0.2744 1340 0.1962 1740 150 0.1102 550 0.9227 950 0.2705 1350 0.1962 1750 160 0.1076 560 0.8933 960 0.2673 1360 0.1962 1760 170 0.1374 570 0.8495 970 0.2650 1370 0.1924 1770 180 0.1393 580 0.8099 980 0.2612 1380 0.1865 1780 190 0.1394 590 0.7601 990 0.2564 1390 0.1833 1790 200 0.1469 600 0.6968 1000 0.2528 1400 0.1814 1800 210 0.1546 610 0.6291 1010 0.2501 1410 0.1801 1810 220 0.1548 620 0.5684 1020 0.2483 1420 0.1802 1820 230 0.1600 630 0.5488 1030 0.2469 1430 0.1802 1830 240 0.1652 640 0.5402 1040 0.2457 1440 0.1803 1840 250 0.1655 650 0.5305 1050 0.2448 1450 0.1802 1850 260 0.1762 660 0.5196 1060 0.2442 1460 0.0543 1860 270 0.1845 670 0.5092 1070 0.2411 1470 1870 280 0.1860 680 0.4982 1080 0.2361 1480 1880 290 0.1949 690 0.4866 1090 0.2329 1490 1890 300 0.2078 700 0.4755 1100 0.2309 1500 1900 310 0.2148 710 0.4642 1110 0.2297 1510 1910 320 0.2242 720 0.4529 1120 0.2289 1520 1920 330 0.2361 730 0.4422 1130 0.2255 1530 1930 340 0.2440 740 0.4314 1140 0.2205 1540 1940 350 0.2528 750 0.4203 1150 0.2172 1550 1950 360 0.2634 760 0.4100 1160 0.2146 1560 1960 370 0.2715 770 0.3995 1170 0.2132 1570 1970 380 0.2803 780 0.3888 1180 0.2124 1580 1980 390 0.2907 790 0.3790 1190 0.2082 1590 1990 400 0.2989 800 0.3686 1200 0.2022 1600 2000 5/17/00 3:23:49 pm WRG Design Inc. page 16 DRAINAGE REPORT 5/17/00 . 72ND OFFICE BUILDING KAL DETAIL HYDROGRAPH SUMMARY HYDROGRAPH No. 5 Peak runoff: 1.1193 cfs Total Vol: 0.67 ac -ft TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN TIME DESIGN RUNOFF RUNOFF RUNOFF RUNOFF RUNOFF (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) (min) (cfs) 10 410 0.3481 810 0.4123 1210 0.2295 1610 20 420 0.3629 820 0.4034 1220 0.2270 1620 30 430 0.3749 830 0.3954 1230 0.2254 1630 40 440 0.3909 840 0.3878 1240 0.2244 1640 50 450 0.4099 850 0.3811 1250 0.2238 1650 60 460 0.4259 860 0.3738 1260 0.2234 1660 70 0.0003 470 0.4453 870 0.3660 1270 0.2232 1670 80 0.0284 480 0.4671 880 0.3591 1280 0.2231 1680 90 0.0298 490 0.4866 890 0.3525 1290 0.2231 1690 100 0.0305 500 0.5477 900 0.3469 1300 0.2230 1700 110 0.0864 510 0.8591 910 0.3420 1310 0.2230 1710 120 0.0904 520 1.0361 920 0.3362 1320 0.2231 1720 130 0.0899 530 1.1193 930 0.3297 1330 0.2231 1730 140 0.1292 540 1.0932 940 0.3241 1340 0.2231 1740 150 0.1348 550 1.0703 950 0.3195 1350 0.2232 1750 160 0.1321 560 1.0324 960 0.3150 1360 0.2232 1760 170 0.1529 570 0.9824 970 0.3113 1370 0.2199 1770 180 0.1662 580 0.9400 980 0.3067 1380 0.2137 1780 190 0.1668 590 0.8904 990 0.3013 1390 0.2093 1790 200 0.1745 600 0.8323 1000 0.2968 1400 0.2071 1800 210 0.1822 610 0.7789 1010 0.2925 1410 0.2060 1810 220 0.1824 620 0.7234 1020 0.2891 1420 0.2054 1820 230 0.1856 630 0.6613 1030 0.2865 1430 0.2052 1830 240 0.1905 640 0.6055 1040 0.2845 1440 0.2051 1840 250 0.1932 650 0.5567 1050 0.2829 1450 0.2049 1850 260 0.2007 660 0.5478 1060 0.2816 1460 0.1242 1860 270 0.2108 670 0.5398 1070 0.2788 1470 1870 280 0.2163 680 0.5311 1080 0.2746 1480 1880 290 0.2254 690 0.5216 1090 0.2708 1490 1890 300 0.2382 700 0.5125 1100 0.2676 1500 1900 310 0.2467 710 0.5034 1110 0.2654 1510 1910 320 0.2557 720 0.4940 1120 0.2636 1520 1920 330 0.2676 730 0.4850 1130 0.2601 1530 1930 340 0.2759 740 0.4760 1140 0.2550 1540 1940 350 0.2856 750 0.4666 1150 0.2512 1550 1950 360 0.2975 760 0.4578 1160 0.2485 1560 1960 370 0.3056 770 0.4488 1170 0.2465 1570 1970 380 0.3159 780 0.4394 1180 0.2444 1580 1980 390 0.3269 790 0.4308 1190 0.2398 1590 1990 400 0.3359 800 0.4216 1200 0.2336 1600 2000 L. ( . 5/17/00 3:23:49 pm WRG Design Inc. page 17 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL STORAGE STRUCTURE LIST UNDERGROUND PIPE ID No. ONE Description: UNDERGROUND PIPE Diameter: 4.00 ft. Length: 265.00 ft. Slope...: 0.0010 ft /ft upstr: dnstr: e J 5/17/00 3:23:49 pm WRG Design Inc. page 18 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL STAGE STORAGE TABLE UNDERGROUND PIPE ID No. ONE Description: UNDERGROUND PIPE Diameter: 4.00 ft. Length: 265.00 ft. Slope...: 0.0010 ft /ft upstr: dnstr: STAGE <---- STORAGE - - - -> STAGE c---- STORAGE - - - -> STAGE c - - -- STORAGE - - - -> STAGE < - - -- STORAGE - - - -> (ft) -- cf - -- -- Ac -Ft- (ft) -- -cf - -- -- Ac -Ft- (ft) ---cf--- -- Ac -Ft- (ft) - - -cf -- Ac -Ft- 206.64 0.0000 0.0000 207.80 678.99 0.0156 209.00 1905 0.0437 210.20 3033 0.0696 206.70 1.1705 0.0000 207.90 772.69 0.0177 209.10 2010 0.0461 210.30 3103 0.0712 206.80 13.488 0.0003 208.00 868.99 0.0199 209.20 2114 0.0485 210.40 3167 0.0727 206.90 45.052 0.0010 208.10 967.53 0.0222 209.30 2216 0.0509 210.50 3224 0.0740 207.00 84.497 0.0019 208.20 1068 0.0245 209.40 2318 0.0532 210.60 3269 0.0750 207.10 136.33 0.0031 208.30 1170 0.0269 209.50 2417 0.0555 210.70 3305 0.0759 207.20 197.03 0.0045 208.40 1273 0.0292 209.60 2514 0.0577 210.80 3325 0.0763 207.30 264.85 0.0061 208.50 1378 0.0316 209.70 2609 0.0599 210.90 3330 0.0764 207.40 338.65 0.0078 208.60 1483 0.0340 209.80 2701 0.0620 211.00 3330 0.0764 207.50 417.58 0.0096 208.70 1588 0.0365 209.90 2790 0.0641 207.60 500.98 0.0115 208.80 1694 0.0389 210.00 2875 0.0660 207.70 588.27 0.0135 208.90 1800 0.0413 210.10 2957 0.0679 c_ r 5/17/00 3:23:49 pm WRG Design Inc. page 19 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL DISCHARGE STRUCTURE LIST MULTIPLE ORIFICE ID No. ORIFICE Description: ORIFICE STRUCTURE Outlet Elev: 206.56 Elev: 205.30 ft Orifice Diameter: 3.7000 in. Elev: 208.86 ft Orifice 2 Diameter: 3.3000 in. ( ( • 5/17/00 3:23:49 pm WRG Design Inc. page 20 DRAINAGE REPORT 5/17/00 72ND OFFICE BUILDING KAL STAGE DISCHARGE TABLE MULTIPLE ORIFICE ID No. ORIFICE Description: ORIFICE STRUCTURE Outlet Elev: 206.56 Elev: 205.30 ft Orifice Diameter: 3.7000 in. Elev: 208.86 ft Orifice 2 Diameter: 3.3000 in. STAGE <-- DISCHARGE - - -> STAGE <-- DISCHARGE - - -> STAGE <-- DISCHARGE - - -> STAGE <-- DISCHARGE - - -> (ft) - - -cfs (ft) - - -cfs (ft) - - -cfs (ft) - - -cfs 206.60 0.0743 206.60 0.0743 206.60 0.0743 206.60 0.0743 t • a APPENDIX A BASIN MAP 3 APPENDIX A I 4/ 31,........■., . • MADAM DESK34 GROUP, PC- 1 1 AlICM.611.011 • • • 1 1M NAM= 11830 SW ICerr Parkway, S. 325 i 7 v. ; Lake Oswego Oregon 97035 MOM 244-0552 • • .../ -.... .--- INIMIII 4 Oi I 1 A . • •10“, 801143. .. 4).;4. ....., .. . . ' i... ..:=–. • leale.1.8.13 Cu 110180-40. : ..., i i 0.10.0111=1.11.2. ••••=611011.110 / i ..1 '''' ' . - - . 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WACO _- --I .,': I . I I ■• MP. WM, Mg i 1 ■•■ MI01.. WEI MI 41 i Z 5.-.. - - v.--;(1.4bSiin ---"-- ' 4 i===11 –1:-?"'54.' • '''' # t.--- ---------,--: i — II , ei-• Corner 1 Pacific NW I I I 1 1 _ . i 1 4 . F ri-, : e; i 1 Properties ; a 9965 SW. Allen Blvd. Suite 115 D i Z ...., PROPOSED BULDINO a.verton. Clrer. 97 °° 5 ! ! : : •, – • • EAST " u• !- • WEST MOUE FEE . MVO nzAQ • i { <> i .- • • . :1. . ---t- _ . . . . - • = . . . x 1 i :,: merman 1 Project Nt i .' I. • ' ' I I ' ', .., . . . . . • > LU 1 „: ; 1 t ' • . Office _ i ; --- 'i_ ...:..‘,:....,-.---...._ : ........ -- .. ................... ,..... ..-- 72nd Street ; ...... .---; --:.:;.: :*** 0 ._ ... .... . .... _ . . i i • , ‘2.......•••.-.-•,:::.•.-.4.fir7,7•::-1:-•:-::....4-..,-, :: "*"'::: .: - A ; I . - " .; i • ; ;..: :- -i .-.::: . ;.; ....... : ;- : - -;,-;.'--:: MEIN 1 - l's '---1:;:' r. 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Al 09 PA 110 11. 0 11 1 7 A 31 0 1 1 5 COMM O O0137A P1513 61160 170111. O MER OCOCR= L 115 fMMR00 UR1n 5151 R MATEO 11 1101 1E5 1161100/0 5513! f lRL T 1130101. 01516. 11731 No sou. ME 9000 AS warn ' O 117 n 591 %nun f0i5R1 ODOOI05 U5J 1101 541300 9. r Mn LEGEND a 1 5 T' AREA l 6 711110SMm01115 U. OR 112 K#a 4 113 f800 RANKS KRC 01108631 1101 009.00 RAMS f0101 TIER a 11( 3554106 RR ORS SAW MB 3 77 11 On O' war m5 35 0 5 7 0 1351 1 R KM Or 1(110 DS L 0179 5 0 0f M NO 0 6 M'P10 101 1a KONA= NO 0062 11711E MAKE R9031T OO1P1i nE 106 O 110 OK11EA0 1161 T 7. 11100101 O 1E 3005 SEP1C 11R 6 MiROA11L 10 0WA= 66 511679.07 SS45 PICKED BY 1E 0111 1110011T OWING M 11019 01 10 751. K PONIED TO MIMEA 1411 K 10.0111E TAM RS BUMS 51M QO WATER 121E 3051550 055131 603101000 0573 I 011105. 016 G701 BASIN • 33165 51 • N11ER 1[15 • 41.K 0 51? KODAK! TRU mom 52 901 POOR FOIL O 4.OTT PO/ O 130101 365 • AR MIN41MT a SCT 1/t 131 050 MAO 1316311 • OOPWWI 119., OSO 0136363: 11c CLIENT: PACIFIC NW PROPERTIES I SHEET 9665 SW ALLEN BLVD.. STE. 115 cacao 5 BEAVERTON. OREGON 97005 (503)626-3500 o1AR1 E222 ONE /3103 109. CONTACT: PAUL GRAM 360- 695 -1385 503 - 289 -9936 O[O® ®1 J03 3R 603