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Home My WebLink About03066 - Technical Information Report - Drainage BAIMA & HOLMBERG INC. i 3d 6� DRAINAGE REPORT for CHARLES COURT February 26, 2003 ' T�vis� �j�5/o3 ?� ECEI �� D � �o U�P s J U L 3 1 2003 ,�Q� o�� -��JING DIVISiON a � • � 3l � -� � �� 1 STER��r�'� SIONAL � EXPIRES 11/30;04 Baima & Holmberg, Inc. Job No. 1673-010 Prepared For Joe Pruss 21305 NE 6t6 Place Redmond, WA 98053 C�� ,� C�d�� 100 FRONT STREET SOUTN • ISSAQUAH • WASHINGTON • 98027-3817 • (425) 392-0250 • (425)391-3055 _ __ Proiect Overview This project involves the development of a 0.96-acre parcel into 4 single-family residences. The site is located along the north side of SE 128�' Street between 148�' Avenue SE and 155�'Avenue SE, in the SW1/4 of Section 11 of Township 23 North, Range 5 East. The site consists of one single-family residence with a grass yard and a gravel driveway leading towards an unattached garage. The rest of the site consists of pasture and lawn with a few sparse trees. The site slopes down to the south at about 5%. U�stream Tributarv Area There is little, if any upstream runoffthat would drain onto the site. Level 1 Downstream Drainage Analvsis Once the storm runoff leaves the site it drains into the 18" storm system on the north side of SE 128"'. The pipe conveys runoff a�proximately 300' to the east side of the intersection of SE 128�' Street and 148 Avenue SE where it flows under SE 128�` Street to the south side of the street. The runoff continues to flow west by ditch, or through culverts under driveways, on the south side of SE 128�' Street for approximately 1150'. From there the runoff enters a culvert attached to a manhole that directs the runoff to the south. There are no apparent drainage problems along this downstream drainage path. The proposed storm system consists of collecting the on-site runoff into a detention tank, I� then routing it into the e�sting combination detention/water quality vault that was constructed with the adjacent Madison's Landing plat. Flows would then be released into back into the SE 128'�drainage system. The detention was designed per the 1998 King County Level 2 criteria. '_ , � •'_� ' . .-�f -:I'' � " = i� `�' � 11 v f --� ,.. �,; �' � �; _.,. ._....... , , ON�L I�� ►- � � N � � ' �1(` {, w '-- �,�,__�';.:t � ' -- .._.._ .;"; _ 1/1)I. f. w l� . J J Y Z _� N �I�'w.'r'.�ry5�. ,..'S;,�y.� ��""�.-�.,,,�,��V V(.V� ,�� .�J ..�.."` ......_„� i ti.. ' �( ...._....�.... - '�•d� �s nv N.�6 N �— ��i.� H.�otr ,., �;.,, � �' lsr�r SiLL 1 � �I nUf�� M N r::rx�•�+}a'�.�F .(� r. W W ! r-t �'`�-i.•'"^.�;.. 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OF 100 Front Steet South 7'2 i ISSAQUAH, WASHINGTON 98027-3817 CALCUTATEDBY DATE (425) 392•0250 FAX (425) 391-3055 CHECKEDBY DATE � SCALE ... �_ . . .__ ... . . .. . _ . . _._. .__- .. .. .. _ . .. _ , . �9u �lU�L � C� C.0 5 .. : . , 5 c� ' �9-d�d�� = o . 2�0 .4-c. _._ . . : _ �l�G, CoN 4 � TtC9rvs � , ,_ _ _ ;_ � � _ 3 5mp �F fi _ 3 20o sF _ = o, t S,Q� _ �L�� , �7�ie��'`�`� _ �i _ _ . _ _ , a = _a. g,(A � �,�4w�v .�s��?x2�- _ �' �� ° _ vs��, �� rz.� s�� p�t w�� c : � _ __ __ _ : ;_ �L : �. 6�O( G�y _ Qco ,_ � � tp4 c�5 __ : : _ �� , CdN1?� T?o ti.5 . _ _ _ __ . . �� ' ��0� S� -f- � �[ ZS�o SF :. ,�� . ... _ _- �1��r� �l1�n� ��oFSlt�'-C ___ __ _ _ _ l J � _ :. 0 .�5�� :_ __ _ :. _ _ . . . �I � - � • 5 f �� L��/y ___ : � _ _ L - � � __ _ _ . . o �l�c� . � � . __ _ __ ___ _ � _ . �a = 0 • ��'� G�y ;_ , . _ .__ __. PRD6UCT 20a�1(Sigle SAeetsl�1 IPaddedl - ` JOB [[C J��O�� BAIMA & HOLMBERG, INC. SHEETNO. OF 100 Front Steet South ISSAQUAH, WASHINGTON 98027-3817 CALCUTATEOBY T� DATE � (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE SCALE , ;_ ; r _ �_ ��t��12� �� 4,�t, _ _ _ _ :_ --� C,��/�� Z �CB�u Ca7�-L _ __ : -` wl r4►TGN-' Z4'2 � !d�'�. ��'-t s T�r�xc �J�'U2 �' � ._:. _ : .._ _ E�¢�C..s' , ___ --� _�,t��T L1�vt�L �. D ,��.�-rzo.� ��, _ : _ _ � _ _ .__ -- : {�Sc w�. f{G jZTs _ S�� wT o� � : : : r .� � _ _ o_ _ _ . � _ � `��.�[� 7��r� . _ : � _ __ . -� ta� ` c��-�.T�- _�� _ �_��,-,,��s;�,��,� . � �og �6�3 —a 1� BAIMA & HOLMBERG, INC. SHEETNO. OF 100 Front Steet South l �� / ISSAQUAH, WASHINGTON 98027-3817 CALCUL4TEDBY %^IZ DATE 2 ( '��d�� il (425) 392-0250 FAX (425) 391-3055 CHECKED BY DATE �� SCALE _ _ _._ _ .. __ J�IJ r477��L- C�j�l¢C,c_� ��ZSC�� : , _ __ : _ _ __ . . _ :. ;_ __ _ - � � _ - . : _. . : --�- �,� W�� ,� � ° : � : _ _ D __ _. � ; - Vs� �'�.�5i� N k �� D 51��•�� _ . _ _ �N �-D,��.T� �c�r v,4�v��- � _ _ . .__ _ _ __ _ _ �Mv4�lso Ns �y4�rv0�+��, . _ _ �Q� UnwwtE -- 3• a AG �D,q� *_,� �o,z5 °�� : � P � z _ ^ z� z�� _ _ _ : : _ i ��4 �T V�t,T' �p�� , , __ _ , _ � , __ _ ___ ._= f �.3 -�- /DL �- �{6�, 2� -�l•.3��- �� „1 __ _ ;. _ _ /-� ` �� Ta� ' �j�S3..3C� ; __ . ; ------ ; , M�4Dt 50��6 C.1�n�w ti, (l-�`j� (�,� I� v w► i� G� _ : =� �ol�G� _ . ___ _ _ _ ��4- VO �U uti� 14��l G�-j?l.1� ,__ __ = sZ3c� -6or c� =� �5�� _ _ _ . . 8 � >2 �z�c� __ ._ _ __ __ _ . __ _ : : __ _ __ � __ . � � m � � ' ' � c�c �'t�5 � v,�v�r _ � �v vae�ucr 2ua i;s�mp�skeni m�i icsc� . �'l i 5' X 10' REMOVABLE ACCESS MH SPACED REMOVABLE PAR7ITEON �NIET ACCESS GRATE <2 TOTA�) I00' MAX. APART ACCESS GRATE BAFF�E V/ SOLiD LOCKING LID (2 TOTAL) OUTLE 15, ��,1�� OVERFLOW DEPTN � (6' MIN) • 35' :�\ , . , i\, l. , rl, . r\ . i 'IALS — -�.. _ CEILING��5�`Q 4'z 4' SUMP MIIJ,� ELEV.-+�s.sv W.S O OVERFLOW��a��S.Z� STD. CALV. STEPS OR �AD�ER T t2• — — DETENTION VAULT PLAN VIEW ' FLOW RESTRICTOR N.T.S. (FROP-T SHOWN) ELEV=489.00 SEE DETAI� 8' LIVE _ — 12" SD ELEV-471.50 STORAGE � ORIfICE DtA. — CELL PARTI110N BAFFLE — � �1 3/16" � — WAIL FLANGE 12" SD 4'�EAp — �� •"' �STORACE INV=1(��D INV= Ni — ELEV�484.00 fL0p R ELEV� — ��Z��N~'� ELEV.4 .��00� � 482.06 f.(�(�,}0�JJ� `�.Z� Ni 0,5x MIN. 0.5x MIN. ELEV= � FLO R ELEV� � /t'6�•3�" EILINC ELEV�475.50 �s.G� , ORIFICE DIA�1" � 4'x 4' SUMP MIN. SLOPE VAULT BOTTOM �� • 7' SEDIMENT O.Sf. TOWARDS INLET h OUTLET STORACE ' NOTES: �,� f100R ELEV�462,38 TO 481.88 �, PLANS MUST BE DESIGNED dc STAMPED BY A RECISTERED PROF, STRUCTURAL ENGR. ��'T IN� pr�V/D!a 2. ALL METAL PARTS: CORRSIOIJ RESISTANT. STEEL PAR15 GALVANIZED k ASPHALT — ry�,,.p � COATED (TREATMENT I OR BETIER), -�r�C(.1VT�G1�°R 3. PROVIDE WA7ER STOP qT A�L CAST-IN-PLACE CONSTRUCTION JOINTS. � �a ,�r,R,�v�.aF 5% 5% PRECAST VAULT SHA�L HAVF APPROVED RUBBER GASKET SYSTEM. �n�Lr.. �s��p`T/NJf7�9 DETENTION VAULT ' ��'c� �+�;��'/'�o �Y CROSS SECTION F�OOR ELEVm462.00 TO �81.50 � � N.T.S. bAt�A f �"I�L-►�+71�'� /NG, N.T.S. C7' � .� �"`0,1� �� C � r "� � � _ � � � � � � � � �� z � � N � � �, � � � w � .-� � r �, � _ � ^ � ,�_b Existing Conditions KCRTS Peaks Flow Frequency Analysis Time Series File:1673u.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 0.094 4 2/09/O1 2:00 0.205 1 100.00 0.990 0.061 6 1/05/02 16:00 0.114 2 25.00 0.960 0.114 2 2/27/03 7:00 0.100 3 10.00 0.900 0.047 B 8/26/04 2:00 0.094 4 5.00 0.800 0.059 7 10/28/04 16:00 0.093 5 3.00 0.667 0.100 3 1/18/06 16:00 0.061 6 2.00 0.500 0.093 5 11/29/06 3:00 0.059 7 1.30 0.231 0.205 1 1/09/08 6:00 0.047 8 1.10 0.091 Computed Peaks 0.175 50.00 0.980 Developed Conditions KCRTS Peaks Flow Frequency Analysis Time Series File:l673d.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------ Flow Rate Rank Time of Peak - - Peaks - - Rank Return Pror (CFS) (CFS) Period 0.155 5 2/09/O1 2:00 0.320 1 100.00 0.990 0.119 8 1/05/02 16:00 0.188 2 25.00 0.960 � 0.188 2 2/27/03 7:00 0.177 3 10.00 0.9ri 0.122 7 8/26/04 2:00 0.163 4 5.00 0.80' II' - 0.148 6 10/28/04 16:00 0.155 5 3.00 0.6E 0.163 4 1/18/06 16:00 0.148 6 2.00 0.50u 0.177 3 10/26/06 0:00 0.122 7 1.30 0.231 0.320 1 1/09/08 6:00 0.119 8 1.10 0.09" Computed Peaks 0.276 50.00 0.98 � 7' Diameter Detention Tank - Level 2 Flow Control Retention/Detention Facility Type of Facility: Detention Tank Tank Diameter: 7.00 ft Tank Length: 106. ft Effective Storage Depth: 6.50 ft Stage 0 Elevation: 0.00 ft Storage Volume: 3950. cu. ft Riser Head: 6.50 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 0.81 0.046 2 3.50 0.94 0.041 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 0.00 0. 0.000 0.000 0.00 0.01 0.01 4. 0.000 0.002 0.00 0.02 0.02 8. 0.000 0.002 0.00 0.03 0.03 12. 0.000 0.003 0.00 0.04 0.04 16. 0.000 0.004 0.00 0.05 0.05 20. 0.000 0.004 0.00 0.06 0.06 24. 0.001 0.004 0.00 0.07 0.07 28. 0.001 0.005 0.00 0.18 0.18 74. 0.002 0.008 0.00 0.29 0.29 124. 0.003 0.010 0.00 0.40 0.90 177. 0.004 0.011 0.00 0.51 0.51 233. 0.005 0.013 0.00 0.62 0. 62 292. 0.007 0.014 0.00 0.73 0.73 353. 0.008 0.015 0.00 0.84 0.89 416. 0.010 0.016 0.00 0.95 0.95 481. 0.011 0.017 0.00 � 1.06 1.06 548. 0.013 0.018 0.00 1.17 1.17 617. 0.014 0.019 0.00 i 1.28 1.28 688. 0.016 0.020 0.00 1.39 1.39 759. 0.017 0.021 0.00 1.50 1.50 832. 0.019 0.022 0.00 ! 1.61 1.61 907. 0.021 0.023 0.00 1.72 1.72 982. 0.023 0.023 0.00 1.83 1.83 1059. 0.024 0.024 0.00 1.94 1.94 1136. 0.026 0.025 0.00 2.05 2.05 1214. 0.028 0.026 0.00 2.16 2.16 1293. 0.030 0.026 0.00 2.27 2.27 1373. 0.032 0.027 0.00 2.38 2.38 1453. 0.033 0.028 0.00 2.49 2.99 1533. 0.035 0.028 0.00 , 2.60 2.60 1614. 0.037 0.029 0.00 00'0 OI6'b T60'0 'OS6� OS'L 08' L 00"0 06Z' b T60"0 'OS6E OL'L OL'L 00'0 090'6 T60'0 'OS6£ 09'L 09'L 00'0 088'£ T60'0 'OS6E OS'L OS'L 00'0 089'£ T60'0 'OS6� Ob'L Ob'L 00'0 086'� Z60'0 'OS6� 0�'L 0£'L 00'0 09Z'� 160'0 'OS6£ OZ'L OZ' L 00'0 OZO'E T60'0 'OS6£ OI'L OT'L 00'0 OLL'Z 160'0 'OS6£ 00'L 00'L 00'0 08b'Z T60'0 'OS6E 06'9 06'9 00'0 069 '1 T60'0 'OS6� 08'9 08'9 00'0 096'0 Z60'0 'OS6� OL'9 OL'9 00'0 96£'0 I60'0 'OS6� 09'9 09'9 00'0 L80'0 Z60'0 "OS6£ OS'9 OS'9 00'0 980'0 T60'0 'S�6� 6�'9 b�'9 00'0 S80'0 060'0 ' bZ6£ E�'9 £�'9 00'0 b80'0 680'0 'S68E ZZ'9 ZZ'9 00'0 �80'0 680'0 '198E Ti'9 TZ'9 00'0 Z80'0 880'0 'ZZ8£ 00'9 00'9 00'0 080'0 L80'0 'LLL£ 68'S 68'S 00'0 6L0'0 980'0 '6ZL� 8L'S 8L'S 00'0 8L0'0 680'0 '8L9� L9'S L9'S 00'0 9L0'0 £80'0 "EZ9£ 9S'S 9S'S 00'0 SLO'0 Z80'0 '99S£ 5�'S Sb'S 00'0 6L0'0 Z80'0 'LOS� �E"S �£'S 00'0 ZLO'0 6L0'0 'S�bE EZ'S £Z'S 00'0 ZLO'0 8L0'0 't8£� ZZ'S ZT'S 00'0 690'0 9L0'0 'St�£ TO'S TO'S 00"0 890'0 SLO'0 '8�Z£ 06'6 06'b 00'0 990'0 ELO'0 '8LT£ 6L'b 6L'b 00'0 S90'0 TLO'0 'LOI£ 89'6 89'6 00'0 E90'0 OLO'0 'S£OE LS"6 LS'6 00'0 T90'0 890'0 'T96Z 96'6 9�'b 00'0 6S0'0 990'0 'L88Z S�'� S�"� 00'0 LSO'0 S90'0 'TI8Z bZ'b 6Z'� 00'0 SSO'0 £90'0 ' ��LZ �T'b £T'6 00'0 £SO'0 T90'0 '9S9Z ZO'b ZO'b 00'0 ISO'0 6S0'0 '8LSZ T6'£ T6'� 00'0 8�0'0 LSO'0 '66�Z 08'£ 08'� 00'0 Sb0'0 9S0'0 '6TbZ 69'£ 69'� 00'0 Tb0'0 bS0'0 '6£EZ 8S'� 8S'� 00'0 Ob0'0 6S0'0 'T££Z LS'£ LS'� 00'0 060'0 �SO'0 '6Z£Z 9S'£ 9S'£ 00'0 8�0'0 �SO'0 'LT£Z SS'E SS�� 00'0 L£0'0 £SO'0 '60�Z 6S'� �5�� 00'0 S�0'0 ESO'0 'ZO£Z £S'� ES'£ 00'0 bE0'0 �SO'0 'S6ZZ ZS'E ZS'� 00'0 �EO'0 �SO'0 'L8ZZ iS'£ ZS'£ 00'0 �EO'0 ZSO'0 'OSZZ OS'£ OS'£ 00'0 EEO'0 ZSO'0 'S9ZZ 86'E 8�"� 00'0 ��0'0 OSO'0 ' 68ZZ L£'E LE ' ' 00'0 Z�0'0 8�0'0 '£O1Z 9Z'� 9Z' 00'0 Z�0'0 9�0'0 'ZZOZ ST'� SZ ' 00'0 Z�0'0 Sb0'0 'Ob6T �0'E 50' 00'0 ZEO'0 �b0'0 '8S8T £6'Z �6' 00'0 0£0'0 I60'0 'LLLI Z8'Z Z8 ' ��•0 57,^,•0 5�0•n •�FgT Zi •? L� . 7.90 7.90 3950. 0.091 4.580 0.00 8.00 8.00 3950. 0.091 4.730 0.00 8.10 8.10 3950. 0.091 4.890 0.00 8.20 8.20 3950. 0.091 5.030 0.00 8.30 8.30 3950. 0.091 5.180 0.00 8.40 8.90 3950. 0.091 5.320 0.00 Hyd Inflow Outflow Peak Storage Target Calc Stage Elev (Cu-Ft) (Ac-Ft) 1 0.32 ******* 0.29 6.57 6.57 3950. 0.091 2 0.15 ******* 0.11 6.51 6.51 3950. 0.091 3 0.18 0.10 0.09 6.40 6.40 3936. 0.090 10-yr 4 0.16 ******* 0.08 5.87 5.87 3766. 0.086 5 0. 19 ******* 0.07 4.80 4.80 3183. 0.073 6 0.15 0.06 0.05 3.85 3.85 2537. 0.058 2-yr 7 0.12 ******* 0.03 2.44 2.44 1497. 0.034 8 0.12 ******* 0.03 2.02 2.02 1189. 0.027 ---------------------------------- Route Time Series through Facility Inflow Time Series File:1673d.tsf Outflow Time Series File:rdout Inflow/Outflow Analysis Peak Inflow Discharge: 0.320 CFS at 6:00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.288 CFS at 8:00 on Jan 9 in Year 8 Peak Reservoir Stage: 6.57 Ft Peak Reservoir Elev: 6.57 Ft Peak Reservoir Storage: 3950. Cu-Ft . 0.091 Ac-Ft Flow Frequency Analysis Time Series File:rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----Flow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.109 2 2/09/Ol 18:00 0.288 6.57 1 100.00 0.990 0.028 7 1/06/02 6:00 0.109 6.51 2 25.00 0.960 0.066 5 2/28/03 6:00 0.086 6.40 3 10.00 0.900 0.026 8 8/24/04 0:00 0.080 5.87 4 5.00 0.800 0.049 6 1/OS/05 10:00 0.066 4 .80 5 3.00 0.667 0.080 4 1/18/06 22:00 0.049 3.85 6 2.00 0.500 0.086 3 11/24/06 6:00 0.028 2.44 7 1.30 0.231 0.288 1 1/09/08 8:00 0.026 2.02 8 1.10 0.091 Computed Peaks 0.229 6.55 50.00 0.980 Flow Duration from Time Series File:rdout.tsf Cutoff Count Frequency CDF Exceedence Probability CFS ° ° ° - 0 0 0 0.002 46162 75.280 75.280 24.720 0.247E+00 0.005 5112 8.337 83.617 16.383 0.164E+00 0.008 2414 3.937 87.554 12.446 0.124E+00 0.011 2355 3.841 91.394 8.606 0.861E-01 0.019 1574 2.567 93.961 6.039 0.609E-01 0.017 1438 2.345 96.306 3.694 0.369E-01 U.023 451 0.735 9�.289 1.711 0.111E-U� 0.026 405 0.660 98.950 1.050 0.105E-0] 0.029 235 0.383 99.333 0.667 0.667E-0� 0.032 173 0.282 99.615 0.385 0.385E-02 0.035 67 0.109 99.724 0.276 0.276E-0� 0.038 6 0.010 99.734 0.266 0.266E-0% 0.041 10 0.016 99.750 0.250 0.250E-0'� 0.044 14 0.023 99.773 0.227 0.227E-0� 0.047 18 0.029 99.803 0.197 0.197E-0� 0.050 21 0.034 99.837 0.163 0.163E-0� 0.053 19 0.031 99.868 0.132 0.132E-G� 0.056 10 0.016 99.884 0.116 0.116E-0�: 0.059 9 0.015 99.899 0.101 O.101E-0_: 0.063 7 0.011 99.910 0.090 0.897E-0_' 0.066 10 0.016 99.927 0.073 0.734E-0; 0.069 9 0.015 99.941 0.059 0.587E-0; 0.072 8 0.013 99.954 0.046 0.457E-03 0.075 6 0.010 99.964 0.036 0.359E-03 0.078 7 0.011 99.976 0.024 0.245E-03 0.081 4 0.007 99.982 0.018 0.179E-03 0.084 4 0.007 99.989 0.011 0.114E-03 0.087 4 0.007 99.995 0.005 0.489E-04 0.090 0 0.000 99.995 0.005 0.489E-04 0.093 0 0.000 99.995 0.005 0.489E-04 0.096 1 0.002 99.997 0.003 0.326E-04 0.099 1 0.002 99.998 0.002 0.163E-04 0.102 0 0.000 99.998 0.002 0.163E-04 0.105 0 0.000 99.998 0.002 0.163E-04 0.108 0 0.000 99.998 0.002 0.163E-04 ---------------------------------- Route Time Series through Facility Inflow Time Series File:1673d.tsf Outflow Time Series File:rdout Inflow/Outflow Analysis Peak Inflow Discharge: 0.320 CFS at 6:00 on Jan 9 in Year 8 Peak Outflow Discharge: 0.288 CFS at 8:00 on Jan 9 in Year 8 Peak Reservoir Stage: 6.57 Ft Peak Reservoir Elev: 6.57 Ft Peak Reservoir Storage: 3950. Cu-Ft . 0.091 Ac-Ft Flow Frequency Analysis Time Series File:rdout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- -----F1ow Frequency Analysis------- Flow Rate Rank Time of Peak - - Peaks - - Rank Return Prob (CFS) (CFS) (ft) Period 0.109 2 2/09/O1 18:00 0.288 6.57 1 100.00 0.990 0.028 7 1/06/02 6:00 0.109 6.51 2 25.00 0.960 0.066 5 2/28/03 6:00 0.086 6.40 3 10.00 0.900 0.026 8 8/24/09 0:00 0.080 5.87 4 5.00 0.800 0.049 6 1/05/05 10:00 0.066 4 .80 5 3.00 0.667 0.080 4 1/18/06 22:00 0.049 3.85 6 2.00 0.500 0.086 3 li/24/06 6:00 0.028 2.44 7 1.30 0.231 0.288 1 1/09/08 8:00 0.026 2.02 6 1.10 0.091 Computed Peaks 0.229 6.55 5`�.00 � .9�C Flow Duration from Time Series File:rdout.tsf Cutoff Count Frequency CDF Exceedence_Probability CFS ° ° $ a o 0.002 46162 75.280 75.280 24.720 0.247E+00 0.005 5112 8.337 83.617 16.383 0.164E+00 0.008 2414 3.937 87.554 12.446 0.124E+00 0.011 2355 3.841 91.394 8.606 0.861E-01 0.014 1574 2.567 93.961 6.039 0.604E-01 0.017 1438 2.345 96.306 3.694 0.369E-01 0.020 765 1.248 97.554 2.446 0.245E-01 0.023 451 0.735 98.289 1.711 0.171E-01 0.026 405 0.660 98.950 1.050 0.105E-01 0.029 235 0.383 99.333 0.667 0.667E-02 0.032 173 0.282 99.615 0.385 0.385E-02 0.035 67 0.109 99.724 0.276 0.276E-02 0.038 6 0.010 99.734 0.266 0.266E-02 0.041 10 0.016 99.750 0.250 0.250E-02 0.044 14 0.023 99.773 0.227 0.227E-02 0.047 18 0.029 99.803 0.197 0.197E-02 0.050 21 0.034 99.837 0.163 0.163E-02 0.053 19 0.031 99.868 0.132 0.132E-02 0.056 10 0.016 99.884 0.116 0.116E-02 0.059 9 0.015 99.899 0.101 O.101E-02 0.063 7 0.011 99.910 0.090 0.897E-03 0.066 10 0.016 99.927 0.073 0.734E-03 0.069 9 0.015 99.941 0.059 0.587E-03 0.072 8 0.013 99.954 0.046 0.457E-03 0.075 6 0.010 99.964 0.036 0.359E-03 0.078 7 0.011 99.976 0.024 0.245E-03 0.081 4 0.007 99.982 0.018 0.179E-03 0.084 4 0.007 99.989 0.011 0.114E-03 0.087 4 0.007 99.995 0.005 0.489E-04 0.090 0 0.000 99.995 0.005 0.489E-04 0.093 0 0.000 99.995 0.005 0.489E-04 0.096 1 0.002 99.997 0.003 0.326E-04 0.099 1 0.002 99.998 0.002 0.163E-04 0.102 0 0.000 99.998 0.002 0.163E-04 0.105 0 0.000 99.998 0.002 0.163E-04 0.108 0 0.000 99.998 0.002 0.163E-04 F� :BAIMA AND HOLMBERG INC FAX N0. :4253913055 Feb. 15 2006 07:52AM P2 , E3A1MA & HOLMBERG INC. rebruaty 13, 2006 Neil Watts City of Renton 1055 South Grady Way Renton, WA 98055 RE: Charles Cnurt Short Pla6---I..UA 03-04 59021YE 4°`'Place Request for aat ,�'arle�tsion to Board ojPublic Works Deferra/ Dear Neil: Plea.se cnnsider this (etter a request for a six�month extension to the Charles Court �3oard of Public Works Deferral gcanted on August 17,2005 for three monthy. Except!'ar Ihe final liil of p�ving on the private road, the applicant, Basic Ventures, hxs completed the short plat improvements. The required sandbags surrounding the catch�a„sin at STA l 0-t�2b is in place to force road runoff into thc storm system,as dictated by the deferral.Both the City inspector and developec would like to defer the final lift construction at least until the heavy equipment part U!'hnuse construction is completed. I believe the original bond for Lhe deferral is still in place, B�ic Ventureti is also doing tbe house construc'on,and has started building on one lot. Plea,se call rrxe at 425-392-0250 or email me at tom�baimaholmberg.com if'you have questaons or need addit�onal information. Very truly yows, BAIMA & HOLMBERG,INC. � �� . � '�� J�� Tum Rcdding J:wet�twaw»�ainnoa�.�v�weu a.o.eee e� `�L � `y 104 FRONT STR�ET SOUTH • 1SSAQUAH • WASHINGTON • 98027-3817 • (425 ��`� -�0 • (425}391-3055 ��;,� Z�- 7� +�C �`�Y o - CITY OF RENTON r> ♦ � '� ♦ Planning/Building/PublicWorks Department � Gre Zimmerman P.E. Administrator �� ,� Kathy Keolker,Mayor gg ' �1�rT� February 24, 2006 Mr. Tom Redding Baima and Holmberg 100 Front Street South Issaquah, Washington 98027 SUBJECT: OFF-SITE DEFERRAL CHARLES COURT SHORT PLAT, LUA 03-040 5902 NE 4�'Place RENTON, WA Dear Mr. Redding: We are in receipt of your letter dated February 13, 2006 in which you have requested an extension for the final lift of paving on the private road. The Development Services Director has reviewed your request and has agreed to extend the deferred final lift of paving until June 30,2006. If you have any additional questions, please contact Jan Illian at(425)430-7216. Sincerely, .�'`�-�jF!� :� 1 Linda Moschetti�� Administrative Secretary Planning/Building/Public Works LM:Ism cc: Gregg Zimmerman, PB/PW Administrator Neil Watts, Development Services Director Kayren Kittrick, Engineering Supervisor Ron Straka, Utility�Engineering Supervisor Arneta Henninger, Engineering Specialist Jan Illian, Engineering Specialist LUA 03 —040 1055 South Grady Way-Renton, Washington 98055 R E N T O N AHEAD OF THF CtiRVE �This paperconfains 50%recycled material,30%post mruurner F��M :Fs�i'^Q Ah;� u,��_�^,a�RG :tiC rAk N�. : ��» =e�. .=4 �2�� 2�:5�AM - � ,� -3�� Baima & Holmberg , Inc , I _ - ENGINEERS & SURVCYORS � 100 FRONT STREET SOUTH ISSAQUAH, WAS��INGTON 98027-3817 PH: (425)392-0250 FAX ; (425)391-3055 JOB NO: L�O �3'� 1 Q To: C,G `� � � �I�� rv ATTN: ��n,�VPt� DATE: 2� Z� �� FROM: �yv, R,��I � �\ � CONTENTS: lj ��Q'�JL�S �v(L�� ijQ'ti/ G��f�riya � ,. �� ¢J�'�� w� uJc9�C,� Ll ��' � COMMENTS: �� a� �� N j�, � � � I��i2 �}-/ � � Lt rti r rt��q-� N��,� ��.- StS�� , w� �4t��,� ,Q �' � � �� " G �3 7� Uc ,v� v �c 7�� CJ�S� �U��4l.�, LU PAGES uding th�s p ge : � � Ly d G��v�p 7 r� ��3 � FAX NO3� ✓,��0 �.�- ��` �� {�7 �� I�N �� ,� � ►� �s � , � , FROM :BAIMA AND HOLMBERG INC FAX N0. :4253913055 Feb. 24 2005 09:53AM P2 . � , � � t � � � � 27' EASEI�ENT 15' �.^7, i 5, EX1511NG GROUNfl ______-�-- 488.1 � ____-_"_- �� , Gxcp �t7ZoH , � % �� ex.—�, Ex. s -� WATER �STORM /j TO =483.5 84" DETEN110N TANK ��Y INV�476.5 SECTION B—B 1"�10' HORIZ. 1"-5' VERT. FRGM :BAI'�A AND HOLMBERG INC FAX N0. :4253913055 Feb. 24 c005 09:53AM P3 - ' . I \ } 3� � � � �� ! � � � � . � \✓ � l,t) �L C,F.Y� ��c�. L�,� � I (�� j � �� I � �, ��, � � Z � > > �4 ` 4 �G�� ' ► ' __�- -- � �� f�� , � ► � � � , '��rv� .. � o �-3,5� � �1,,��= `�� ,,:l,� i � o � � � �3 -y� � ,� `�� I ,�� S��p � � �U�r- ��. ID� � � � ' , �,{�s , � I ; � r ��`�N� Z �` Pncv�-� � �� ;� � ` jj R,�'C �Sw�J � � ( , � ( ' I �. B � � � ' ' ,� ' � ' .'i _ �' � ( c� � , � . / ��/ � d 1 � �' y F �'�s ,i' �", � ,.�j��✓ � � l .�..1 --� . .' r�i � � � f � _ ,� � ' �4 'ti'��'\S D ��, p '� r '� �`I � � � , � �\ 1 —�� S l :�� ,-�,1- --� --------------------`...,..� __ � �� 1 1 , ---_ - {,,- � ` --- . �� 4 �,, �i - --- ^ ,�. ■iC_acR'c� �`_`-- ��-��ti��t � � --- -- ' �S `-$Z�__a � 'r�3��z�_3� �a;a�t.=`.Cm� - tz i� _ \ � �aOCL� S �._ � ��__� I B + � , � � � � ss SS s � NI � �-i ` _ - _ ___ _ _ - _ -_ _ _ _ _ _ _ _ _ _ - - - - - - - � + oa � �` �� ! -�, �o+oo ,� � C� �S�" �� ' -�. � � ''`��OU� l��/��. L/,1��" �� .��. o � �lm - � �z. z�- �� ,M — �� g. � �z„ �,u�1/ / 1�� y � � ,� J l ��- �'�v JV 1/� , 3� w t ��-� �o j .� 1 FRCM :BAIMA AND HOLMBERG INC FAX N0. :4253913055 Mar. 08 2005 07:51AM P1 � _ .. . , � Baima & Holmberg , Inc , ENGIN�ERS & SURVEYORS , 100 PRONT STREET SOUTH ISSAQUAH, WASH1IdGTON 98027-3817 PH: (425)392-0250 FAX : (425)391-3055 I JoBrro: l (�� 3-a ► 1 'r0: C l, �� N�N ATTN: 1��..0/�IN C�. (� �`I� !�I I�J � �1,/G�,j�� DATE: -a� / g�o� � FRO:Vt: To w�. j��w� CONTENTS: ��j`�'1�-�ZL�S C�i� Z 1`f ti G ty��, � COMMENTS: �rlJ�T� � � �/1�/�D� 'T� �{� (//�7I� ��'Z ll�cc�'z ��iu� � o�rz pt� c r�-�� . � `� C �� r �� r� � a�� L � L�-�r� �p,�t-� _!�1,�n,�s PAG�S (Including this page): � � F.A,X NO: �Z� ' `��a ~ �3�� Overhead Wire Protection Plan Plat Charles Court 5901 NE 4th Access through NE 4th Pl only. Absolutely no vehicle traffic directly off NE 4`n Owner Basic Ventures Inc 18211 240th Ave SE Maple Valley Joe Pruss 206-930-7000 Contractor Mark A. Carter PO Box 3431 Renton WA. 98056 425-271-3615 Plan The major construction in the area of the existing overhead utilities is the detention tank that being constructed beyond 20' north of the utility poles along the north side of NE 4`n Street. Detention tank construction will be clear of potential conflicts with the telephone and TV lines (low) and the electrical lines (high) on the utility poles. The Contractor will use a mini-excavator for the construction of adjacent underground storm and water pipes that will be under the lines. The boom of the machine is too short to reach the phone and cable lines (low lines) or the electrical lines (high lines}—the machine is a PC-40 Komatsu. The high voltage lines are installed very high and have no chance of being struck. For information or in case of emergencies, the following are the names and contact numbers of the utility providers. Qwest Kim Gray 206-371-0327; 206-345-2572 Comcast Bill Walker 206-255-6975 PSE Dave Hawthorne 253-405-7888 �� / 0 2�" d �� . �� 3�,�,��;� , ,� � + � . FRCM :B�:�A AND HOLMBEKG INC FAX �0. :4253913a5� M��. 08 "c�a5 07:�'�AM P2 � �� c rnc- � � ��D cnr�►r�� c,� � ��p� � � (�" ClTY �• aENTON ( � RECOM t ^JDED � l D'f" �o � � �.. F R APF'Rv4 AL � � � �� l rn ` �� t � BY ATE: ��'�o.� ��— wj= G Z.� U Q , �� L f � 7� � C)� BY DATE: � � BY DATE: � V� �SBr►✓�O � �J v =- y � �.oo l:�pc,r.��, 1l�bNrp G��R� ' �� < < � I 0 6 `'t' 8c� " �` ' �� ' � , � � � � ` ��N �� \� � _ � � h � � � � � 1 � , .. _� �� Z r� � ��` r `a��l2,� ,� t�` -. �D �� ,� D � � , ,� I S � �� r"' � ...�.-..�� .-. 2 a� � _ " ' �- =-�--------------- =� _a __ ��` '�' �' � , . ` __ ____ -= - ^ s�ay� . , ,,. a�y� 7GL`9 L'��LS�"J"2aS a=t�a�ssa�L�d3"SS'.L23'e75l�� taa��'a�2_ '�j� �'.m�= 7E =�s st�'-a� � , � �, .. � ' r/ / i U T'�' � r�-t,1' � SS � � _ � -- — 1 + 00 � 0+00 �� G� *T l �� 41 �Qr� C � � �� t�t1 P so�� D �o � �� w � �� o�t� Go��i �t D � � �. �� q2, 2 � � � � S�.o � � ti� .- � � 6 .i �` ,� � �� $,�o Cz.,,,�,,,,� r�v� �, �� .c�o L�'' w� . �R� :BAIMA AND HOLMBERG IN� FAX N0. :4253913055 Mar. 08 2a05 07:51AM P3 � 27' EASEMENT 15, � �. � 5� • � 23.5` _..-----f�-- EXt5f1NG C�ROv D 488.1 _ _ � -i �;��r�Z��.`� � I y EX.-�.p EX. 18" .` WATER O�STORM r _�� g � '�� '� � 84�� E YC1�1/h j'i�yyV QETENT]ON s �.��r� � T�wK I ��'~ INV=476.5 �� B—Q 1"=10' HORIZ. 1"a5' VERT. � V I\!l�LL ` _ ;:'� ;.�; UTILITY EASEMENT -� � - - F � CB� TYPE I 6~ PVC OOF��sl IiAKA _ t' 'L� A�.I.CJ� ru�v v nu� � AIVU �JU% V IY1t ' � W LOCKING � �"' " TO f ,'' h� ' ASEMENT TO qTY OF RENTON � � _•.;� � �RAIN O O.�fi:`�l`�� , � SHALL BE OVE �.; � MATCN EXISTING � GR�TE ti MIN. �'=-=--- -! � REMO€ �, REC. N0. � � � .� ;:�PAVING. CURB, GUTTER � ��_'.��: � = � � i ', � � � 3 �= RIM=495.�4 � �_-.-- \ , CYC�ONE � � 10. GALVANIZE , . �..t ANO SIDEWALK r'�='.'�- cn INV=491.33 (N}� t � (�-�,�_ �____ � Et�E�i � DRAINAGE FAC � � i � INV=491.00 (E)�� I i ��r;-=:c - �' �\ � J I BETTER INSIDE F �.-; � i :,- � i -L _ � `\ SS INV=485.6t � _ • i,,; , � � �.��;�-- \ � ; : �>� i I i g '`- �: � ' 11. STRUC1l1RE I - -- - - - - - - -- -- - -- - --- -- - - 3�� } - - - - -• - -- � � '41 �--- N.� -I-_ � . ' SPRING LINE C � - - - - �i-- ��: �,�u �' ; �.,� `�'i `, - - - -- - � �� , MIN. FF�'4�� N: (, ' �- \� 26 NEW PRIVATE ACCESS � r . 3 TOP OF ANY ( r : � � '_ - 2"� , - dt U71UTY EASEMENT � �'' t_:� � i � , �.� i � _ • _ \ � �a l\ -�c-S` N �G� �� I-�i�i REC. N0. � 12. ALL CATCF ' � �.� �� - EX. 10' PRIVATE I � ( Q9 -fi� _ , �� i�� . " - ' BELOW PAVEMI �3- � �; ' � `-• _ ` DRAINAC.�E ( � � � fi��'-496-� 4 ::i�V# �i i EX 3'-5 . ..;=;., , ., f - - ;\ - - - - l::R �" - +e�;- EASEMEN�-�-I �- � i-c:- �_�L_ `�N, � ;� ROCKERY .. ��`:�`.. ., „,. � 13. OPEN CUT t , , -• REC. NO`� I � ��. DRIVEWAY >�' i i �i ,., . . j � OF-WAY VYILL ' �`� I i�'� , �-; � � TO BE `-�= £k�Q ; � �� __.�_ ( ' .S ` ' 20021619000011 -^� Q'9 i i � �: , T CITY OF RENTi ' ``� I � REMOVED •.�-' �=i^ ', i � EX. 15' SEWER . ., r;'. ; ` � `,:/ - - - - - - -- __ _ __ - - - - -� - - --�- --3 �` '- - � -� Y_ �� I I �-��' s��H_ � i � EASEMENT ., , 1.., ,. , .. .-, . ._.. � 14. ROCK FOR ' �:`� - - -- - -- - 2'-3' � , . . , - - -- -- - -- ---r - �� `�' i i -; � REQUIRED, SI-I, �_ �I� O A - --`- - � ! ' ALL BUILDINGS � I •= 6 P� �� R��Y . . .. ,., , AND MUST ME /1�� ' � L /�� :; ";'� _ � �=-�: s�v�cEs o � �: , ' � � �_ I ;_ ,�,- ;. TO BE REMOVED. I ;:-r. 27G MIN. TYP.� � g SS INV=482.4t I PASSING AND �� EX. COMBINATION r ;•,1 �, - TYP, � I � -'/_' � � � �� ; DETENTION & WATER j ;'i ". _ � �� t '� �~� `�- � � EX. ROCKERY � 15. ALL BUILD QUAUTY VAULT ,� �'. ;` � -_ �- ` :- �PAiIlNG �- - � I • ; M� ��•0 � �: t � TOP=497.8 CONNECTED T� - - - - - - - `-:/ 3 S,{ ,� _. \�• ' � _,`� � i 10' TOE=494.7 � THE DEVELOP! 1 r;;, ; 4 :'� ,�:; EX. SUBSURFACE I � '�. � �P R�� ` � 4� � � CERTIFIED AS- �%% � �. 1 "- ; DRAIN� �. '�� . DRA1 . ;i � � � ^�EX. R/b PONON Eif ; f � �� `� MIN. TYP. ��-, i � STA 10+26 � SUBMITTEO TC - - - - - - -- - - -- - --- %, S. � + y��'= �9 � - i C�2 TYPE I � - -- -- -- - - -- - -_S.:_+ - - - -- �- - - - f"s.: � ;� �s � 16. ISSUANCE , - - �' % ', - - - -REROUTE EX. � '=. Lo T ��• � `_� �= i W LOCKING VANED GRATE I CITY OF RENT %%� 3 . � EX. CB �T� I '�' ,!/��51��(� � "r i � RIM=491.83 � LEGAL OBLIGP EX. 18" CONC. � ;� 7�; 1 DRAINAGE INTO _ � � (` ' � INV=488.50 RIM=478.33 4 IN. FF=484.Oa' i INV=466.14 ' .- CONTROL MH "�� SURFACE WAl � S � INV=476.23 � -� 3' UTILITY EASEM��NT � � SS INV=480.Ot � � �� '' ' " �� a} � EX. ROCKERY I NOT ACCEPT EX. 18" CONC-� `�� 10' PRIVAT� DRAINAGE 137'�12 SU 1 r�� REC. NO. 5790532�� F_,,.1 MAINTENANCE INv=467.24 ` '/ ;• , _�---�'"'�' EC. NO. .�'---- U.�7f � �-�, 17' PRIVATE • � � • TOP=496.2 OUND 1/2" ____�� '-- =-' , 200�44�?tiO4�01356 �_1_� I f;��- DRA��4 ACGESS RI � � � '-� TOE=491.5 (�� NpE II 48' I 17. THE CON1 REBAR �' �---� � 4r � - W/SOLID LOCKING UD ADEQUATE SF .. _. 0.09'S� " ' , -- _ _ __ - _ ----0.05'W_,__ _. �, . -r�, , - � , \�� l , _ Q � � � O 2.78X M 492-00 � FLAGERS AND - ---------- - - -r.:-- __ _ . __ _ . .. ._._ J r __ �r�' ��- �-:.: ��s��,j ,, �: • �N HEALTH AND -- --- �%r�y� � >f� �_� NV 488 00 (12 W) f . ----- -.-- -- --- - - - - . --- - -,-- + r� /yT�1 , . . . -7 --�-- . - - .__,_,.a_, .>z�,=>, • . • •. . ---- �- --- ___ ._ ___._. _ - - INV=477.00 CONNECTION _ a ��'� '!_»:�>;:��- !��_ ... '.-. ' .� ... ' 1 . �._N�N�L� �h•UIWI� . .� _ _' '__ '__'_' _ _ __'_ 1 -__ '�`` L..-______ ___ __ _ � ' _' "' '__' _ ____' _ _ _ _ _' - . I `'`. _+ � . � 's_�''>' ' -�c=».��».� ' ' �• � ��_ . .-� -t . . - ,_� �\ i - __ _ �,,/ W � - ��-__ _�._._ ��z____=�z_=.�� , XI$�1��` �T9CE - - --- �r --- ----- - -.�- _ CONTRACT. A _ . , . .�. _�s-�-- , • YATERMAIN W � - - _��_� ._._._� �"_ --_�E �B - -- - -- ----' --- - -' - fNTERRUPT _ - - �,�/ ._�.__ __� � . . _ �; � -- --< •,. C EX SSMH W ' - __ __--_ .., .s:. ._ __ � .�a '_E_ G \ a, -�----- N� - - -- - - I I I . - - - - - - - - -______ _ ------ SS EXISTING CONC. � + , `--#-""" IM=429.63 TRAFFIC CON SS SS S SIDEWALK i N �' � EXISTiN� CONC. �NV=478.98 (10"N) SECTIONS OF SS � DEWALlC INV=478.78 (10�S�7' TRAFFIC CON L -J NV=�465.9gs MATCH EXIS7ING � ♦ � MAT,�H EXIS7ING , � � CONCRETE SIDEWALK , _ � ST. S 12 EXISTING FIRE qZETE S�DEWALK 18. SPECIAL C8� 5. TYPE I PROJECT LOC � W/ SOUO LOCKING UD 106'N84" " RIM=479.8f . DETEN710N TANK 10+84.65 PERMANENT BREAK-AWAY (MATCH GROUND) CNTRL MH TYPE II 54 CHAIN TO INv=476.32 M►/SOI.�D LOCKING LID Ex. CB PRIVA EAR AD ENTRANCE RIM=485.5f (MATCH S7DEWALK GRADE) RIM=489.27 20' CURB CUT ___. O.F.=483.50 �8" �E=485.67 (MIMINUM 20' CLEARANCE) w'� ---- ----- INV=477.00 EX. FIRE (� pETAIL) I - � . HYDRANT � EXISTING CURB/GUTfER TO REMAIN� � 5 MIN. SIDEUVALK .__._ -EXISTiNG ASPHALT SIDEWAUC TO BE AROUND UTILITY POLE � REPLACED WITH 5.5' CONC. SIDEWALK � EX. CB � (6' FROM FACE OF CURB) � RIM=486.10 I � 18" IE=483.60 I i I � � EXISTING CHAIN LINK FEN CE 4.5'--{ � ELEV=499.44 CH TO ECITY STAPID RDS _,,,�r�n _ _�t 1 P� _