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410 0 400 800 <br />LEGEND: <br />EXISTING GROUND SURFACE CONTOUR AND EL, FEET (AERIAL SURVEY) <br />!_ ? i REGRADED SQUAW GULCH VLF CONTOUR AND EL, FEET (LAND SURVEY) <br />PROPOSED GROUND SURFACE CONTOUR AND EL, FEET <br />EXISTING DRAINAGES <br />EXISTING ROAD/TRAIL <br />EXISTING RAILROAD <br />WATERSHED CONTRIBUTION AREA 1 <br />WATERSHED CONTRIBUTION AREA 2 <br />WATERSHED CONTRIBUTION AREA 3 <br />WATERSHED CONTRIBUTION AREA 4 <br />WATERSHED CONTRIBUTION AREA 5 <br />DIRECTION OF SURFACE WATER FLOW <br />1 <br />RUNOFF COLLECTION POINT <br />PHASE 1 — PEAK FLOW ESTIMATES <br />DIVERSION CHANNEL <br />DISCHARGE POINT <br />BASINS <br />AREA (acres) <br />100 —YEAR/ 24 —HOUR <br />STORM (cfs) <br />1 <br />1 <br />41.60 <br />46.1 <br />2 <br />2 & 3 <br />76.60 <br />109.2 <br />3 <br />4 <br />54.14 <br />149.4 <br />4 <br />5 <br />44.16 <br />177.2 <br />NOTE: <br />1. TEMPORARY DIVERSION CHANNEL TO BE REMOVED AS PART <br />OF THE PHASED EXPANSION. <br />2. SEE DRAWING A580 FOR STILLING BASIN FOR SECTION <br />AND SIZING DETAILS. <br />REFERENCE: <br />EXISTING GROUND TOPOGRAPHY WAS CREATED BY COMBINING THE FOLLOWING <br />RECV FROM FORESIGHT WEST SURVEYING, INC.: <br />SQUAW GULCH BASE TOPO -- <br />PHASE 1 - REVISED.DWG <br />(RECV MARCH 14, 2010) <br />SQUAW GULCH BASE TOPO - <br />PHASE 2.DWG <br />(RECV APRIL 24, 2010) <br />SQUAW GULCH SASE TOPO -- <br />PHASE 3_DWG <br />(RECV MAY 4, 2010) <br />CCV TOPO EXPANSION 12- -29 <br />-10 NORTH ABEA_DWG <br />(RECV JANUARY 13, 2011) <br />CCV TOPO EXPANSION 01 -28 <br />-11 SOUTH AREA.DWG <br />(RECV JANUARY 28, 2011) <br />SH67 TORO 7- 07- 11.DWG <br />(RECV JULY 11, 2011) <br />VLF2 TOPO EXPANSION 8- 05- <br />1l.DWG <br />(RECV AUGUST 9, 2011) <br />09028- COMOSITE -TOPO MLE <br />LIMITS.DWG <br />(RECV MAY 28, 2010 FROM CC &V) <br />