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HomeMy WebLinkAbout1983-09-26 Drainage Analysis DEF SUB i I RICHARD F . KAMINSKI AND ASSOCIATES, INC. ENGINEERS • ARCHITECTS •LAND PLANNERS • SURVEYORS 451 ANDOVER STREET NORTH ANDOVER,MASS.01845 TELEPHONE 687.1483 August 1, 1983 Mr. Paul Hedstrom chairman North Andover Planning Board Town Hall Main Street North Andover, MA 01845 Re: Fuller Meadow, North Andover, MA Dear Mr. Hedstrom: Enclosed please find the drainage analysis for Fuller Meadow Road, as required under Section 111B, paragraph lE of the Rules and Regulations Governing the Subdivision of Land in. the Town of North Andover. Should you have any questions, please do not hesitate to contact me. Sincerely yours, William Place Registered Professional Engineer Enclosure WP/j t %! ATE r� i ^�S: i .� � { SHEET NO. OF / r i D �. .. �J ;T CHKD. By DATE- - JOB NO. �� �"-_ �JG C.1�✓��� f Cam,_- t--.....!_,T��/re� -- _. y (� I ,2 -- U _ T k , I t , . BY � DATE .� Gi rr c !. T /1 SHEET NO. _ OF."..........:_i_ — _.J : Y CHKD. RY DATE JOB NO, I u �G',(]r��: 16 i - . r I U 1- �'.r r _ 3C SHEET NO, OF�(^: /V /.3 DATE -BY - Y JOB NO. GHKD. BY_ DATE { 4 v j - - r (_ / ;�/ i ) ,35 i�r IC) Ay t -2 - - - 'BY 1 1 —DATE -CT i; }f t t :, r, �y �r—z s SHEET NO. �� .. OF /, i J CHKQ. ElY. . DATE /--; - }; a' �,. JOB NO. _ II t 1 V 1 �gy , J ➢ / OF SHEET .._ iSY ..}} ,� 1 DATE. _., St _:T s� NO JOB NO. CHKD, BY DATE / F. ry L - c — _. r, �L 7 r . -Aj .2 _ BY %. RATE � r�CS)S =CT �, _.� r. �� �� r SHEET NO. / OF �. CNKR. $Y RATE JOB NO, «_. '7,7 12. D?Af �,4GE S �" 'ERAGE�- mil" F - U ' C COMPUTAT_101"'. r C 10D. I 700 60D 500 400 300 200 .0001 2 12C .0001 z 10$ 0002 O 96 U 90 .0003 0002 W U) 100 76 .00D4 T.p003 80 72 .0006 0004 3 �r [!) W 6 6 _ W 70 60 p 0008 .0006 a- LL 6d U 6 .001D boos Z s� 50 4 E A010 O W U / 4 11.1 40 Z 42 10020 c LL 39 0030 .0020/ Z 36 p 30 Z 33 0040 00: b O 5 — LAU Q 30 CD)040 LL W •0060 � 20 Q 2l d 0080 .0060 Q 24 O�Ol00 6"t3 Z li 21 U) . U O Moo U) A O � -7 I i5 .0300 0200 6 LtJ 9 % .0400 .0300 8 W / r ,0400 -9 .0600 6 ,© 10 .0800 .d6o0 10 5 .1000 0$00 .1000 8 12 �- 13 - 3 6 !4 15 _ 2 NOMOGRAPH FOR COMPUTING REQUIRED SIZE OF ' CIRCULAR DRAIN, FLOWING FULL o.s n = 0.013 OR 0. 015 O.s RAINFALL fN"r EN51TY iN ACHES PER HOUR N = i V (_rJ _ J> I I Cf) rn I .z, i then computed by dividing the tGtal overland .flow length by the average N velocity. ]0 2U i I ! ! ! i !I 10 c ]6 Hill iZ, �4 tY I •? � 1 I 11 � � h`' 4C I � I i • � ! 1 I__�� i i I '� F y !- I i l i 1, l Ti 3 i s , i ! • . � - I' 20 i YLt0�l7t' H,' FEE7 PLi, SfLOVb Figure 3-1. --average velocities for estimating' travel tip for overland flow. Si.o-'m sewer or road Futter flow Travel tip tr-rough the store, sewer or ro ad gut'er system to the rain open channel is the sum of travel times in each individual component of the system oet•�;een the uppermost inlet and the outlet. In mc)st cases average velocities can be used wilihout a significant loss of accuracy. D,ar_rig major storm events, the sever system fray be fully taa:ed and atj- ditional overland flov,' ,;gay occur, generally at a significantly lower velocity than the flow in the stogy sWrrers. By usirg average conduit s_ cs E-,T)d an average slope (excluding any vertical drops in the system) , ;'1-ie average veloci ty can b- esti?iL te'd u5ing MaD-nil-19' s for 1 1 Since the kvdraulic ;adios of a pipe flowing half full is the sin as h ,era :espect;ve velocities are eoual . Travel time may f1c>;ana full, "be ti