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! . <br /> Ifor the site aue provided in Lxhibits 5 through 12. The pond will have an infiltration compcncnt, <br /> as wcll as a discharge oudet ro Glenwood Creek. An infiltration rate oC2.70 inches/hour(22.22 i <br /> Iminutes/inch) for the infiltration/detention pond was assumed,Uased on Section 4.0 of the I <br /> geotechnical report (Appendix �. i <br /> iStaoe-storage and stage-discharge relationships for die stormwater infiltration/detention pond <br /> used in the design process are provided in Appendix B. Tlie slage-storage relationship was <br /> calculated using a correction factor of 46 percent. The conection factor�+�as applied to meet <br /> dcsign requircments for an impervious cover of 90 percent for the future developed site iccludin� ,' , <br /> roads (1997, City of LveretQ. The actual arcas of each incremental staoe were determined from <br /> the site plan. The areas �s�ere then com�erted to volumes, which were reduced by the correction ; � <br /> factor(i.e., divided by 1.46) to oUtain the design storage volumes. � <br /> � <br /> The stage-dischargc relationship for the pond infiltration rate was determined by subtrac[ing the I <br /> actual areas of each incremental siage by the respective impen�ious areas that wcre lor.ated <br /> �ti�iU�in the stage arca. The areas of the access roaa, ATB pad, and �eotextile faUric in the stilling <br /> basin wcre con�idered impervious. The resultant areas were Ihen reduced by the correclion <br /> (actor to obtain the desi�i discharge areas. i <br /> L.evel pool results from the hydrolo�ic model .,re cresented in Appendix B. The stormwater i' <br /> facility reyuires approximately 477,G18 cubic fce[of live storage, �ti'hich includes the reguired �I <br /> corrcction factor volume. A stagc-srorage sun;man�for the infilvation/de[ention pond is shown <br /> in Table 3. <br /> Toble 3 - Infiltrofion/Detention Pond Stage-Storoge Summnry <br /> Stae e ((Q Volume(c� Surface Areo(sf) <br /> 359 0 1.177 <br /> 360 1;315 1,6G0 <br /> 362 S,G97 5,164 <br /> 3G7 21,SSg 7,69S <br /> I366 39,995 ]0,742 <br /> 3G8 65.524 14,753 i:: <br /> 370 100,310 20,003 <br /> � 372 14G.050 25,737 <br /> I 374 204,150 32.362 <br /> 37G 277,0G2 40,549 <br /> 378 3GS,053 50,472 <br /> 3S0 475,513 57,255 '�. <br /> 3S2 59G,G25 G3,555 __ r'- <br /> 3S4 730,452 70,273 < <br /> 38G � 577,973 77.245 �: <br /> -- —+SS 1,039.312 � &l,091 — �' <br /> .':,. <br /> -� <br /> CSR Assodoted Boulc�rrd Re�ised l�.ve 2001 ��", <br /> I SlxmwatnSlaflm '9- • ,� ���I��-n � `r <br /> �`�:. <br />