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CONTACTiNM <br />JUSTIN GRIFFITHS, PE <br />j 949.680.0477�nv5,com <br />Water/Wastewater Engineer <br />...,......... <br />EXPERIENCE <br />,. ..............w ... ._............ .......... .................. _ <br />Mr. Griffiths technical beekgrouno Includes Steady and unsteady hydraulic modeling, <br />is years <br />encompassing One- and two-dimensional models; river mechanics; scour analysis, <br />EDUCATION <br />revetment design, hydraulic analysis of bridges and other structures, floodplain mapping, <br />66 Civil Engiaearing- <br />storm drain and energy dissipating structure designs. Additionally, pais experienced in <br />.California polytechnic <br />hydrologic modeling, flood routing, retentioWdetentiou basin design, hydromodiflcation <br />State University -San Luis <br />analysis, and erosion -control des. He assists firq(act;managarswith a variety of water - <br />Obispo, <br />related projects Including Storm water Pollution Prevention Plans (SwPPps), Storm <br />Water Management Plans 0WMPsh Water QualityToohnicai Reports, drainage designs <br />LICENSES <br />and report preparation, He has parformed site Inspections to monitor Best Management <br />Professional Engineer =CA <br />Praotices (amps). <br />!169994 <br />CartitiedFloodplaln <br />Project Experience <br />Manager•CA#tl8-o6........ <br />... . ...1......... .................. ....._ ... -.... ....... ............ . <br />01352 <br />Quarry Road Hydrology/Hydratilles and Alignment Stuffy ( County of San Diego <br />ConHled Q6D/QSP- <br />Project engineer responsible for performing hydrologic, hydreulie.and scour <br />#()0717. SQA <br />calculations fora proposed bridge and roadwayrsalignment over Spring Valley <br />Creek at the Quarry Road crossingfor the San Diego County Department of Public <br />Works. Hydrologic calculations were performed acdoedingto the County of San. Diego <br />Hydrology Manual requirements using HEC-HMSfortha highly urbanized 9.1.5 square <br />mile watershed. The 10•, $0-, 200-, and 500year, 24'hour hydrographs were computed <br />for use in the subsequort hydraulic modeling. Hydraulic modeling was performed 'using <br />HMRAS and consisted of evaluating the existing condittons to determine baseline <br />hydraulio values'. Various roadway alignments, bridge geometries, and channel grading <br />options Were:modeled and evaluated using HEC-RASto determine the optimum <br />configuration which met the County's design objectives. <br />Stone Canyon Creek LOMR i City of Poway <br />Project eng'meer responsible for performing hydrologic and hydraulic calculations for <br />Stone Canyon Creek withlh the City of Poway. Hydrologic calculations were performed <br />using HEC HMS to generate Inflowhydrographs.at various peints.of interest for use <br />In the subsequent hydraulic modeling. The hydraulic analyses consisted of modeling <br />storm drains, culverts, Stena Canyon Creek, and its tdbptary usingXP-SWMM. Storm <br />drains, culverts, and the main channel of Stone Canyon Creek and its tributary were <br />analyzed under unsteady, bho dimansionai flow assumptions. Shallow flow resulting <br />from culvert and storm drain overflow and Stone Canyon Creek overbank flow were <br />modeled In twc•dimenslons. <br />Camarillo Center Hydrologlo/Hydraulics Study j California Conservation <br />Carpe <br />Project engineer who assisted in performing hydrologic and hydraulic analyses to <br />evaluate various flood control mitigation alternatives for the existingfaoilitleset the <br />California Conservation Corps' (CCC) Camarillo Center in Venture County, California, <br />In March 2021, the Camarillo Center experienced a rain eventthat generated <br />approximately 5.6 inches of precipitation. The off-site drainage conditions created <br />I V <br />significant flooding issues as off-site drainage ditches lacked adequate capacity for <br />this largo event. The hydrologic end hydraulic portions of the study evaluated various <br />storm events, including the 100 year, 24-hour storm. <br />25E-546 <br />