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CONTACTINFO JUSTIN GRIFFITHS, PE 949,58S.0477 Water/W0510water Enginecir .......... 11 .... I—— EXPERIENCE 15 .......... ..... . ....... .................. .... ... Mr. Griffiths technical background includes steady and unsteady hydraulic modeling; years encompassing one- and two-dimensional Models; river meche nics; scour analysis,' EDUCATION revetment design, hydraulic analysis of lirrdges and other structures, floodplaln mapping, 13S Civil Engineering - Callfornla Polytechnic storm drain and energy dissipating structure designs, Additionally, he is experienced In hydrologic modeling, flood rooting, retention/detention basin dtislgri, hydromocufloation State University -San Luis analysis, and erosion control design. He aselster Project managers with a variety of wmer� related projects Including Storm Water pollution prevo I hdon Obispo LICENSES plans (SWpppa)' Storm WatWN1Management Pieria (SWMps)' Water Quality Technical Reports, dral nage designs and report preparation, He has Plorformed-Site 1418POtAl4ns to monitor best Managernont Professional Engineer - CA Practices (BMps). Certified Flocidolain Project Experience Meongsir- GA*US-05- ....................... .......... ...... I .......... ...... . ...... ...... ....... ........ ...... ... .... .. ....... 01352 Quarry Road Hydroloo(/Hydraplics and Atignment study I County of San Diego certified QSD/QSP - Pro*ct engineer r%Ponsl1l)1efe;! aterfolmIng hydrologic, hydraulic and scour 00 0-117�CASQA calculations for a proposed bridge and roadway realignment over Spring Valley Creek at the Quarry Road rrOssing for the San Diego County Department of Public Works. Hydrologic talcufationswere performed acc6rdingtbi the County of San Diego HydrologyManual requirements using HEOHMSforthe highly urbanized 11.6 square - mile watershed. Ths 10., 50-, 4Q., and 600-yoor, 24-hour hydrographs were computed for use ht the subsequent hydraulic modeling. Hydraulic modelingwas performed, using HEC-RAS and consisted of evaluating the existing conditions to debarnifriq baseline. hydraulic Values. Various roadway alignments, bridge geometries, and channel grading Options were modeled and evaluated using HEC-RAS to cletamnino the optimum configuration which met the County's design objectives. Stone Canyon -Creek LOMR I City of PoWay Project engineer responsible for Performing hydrologic and hydraulic calculations for Stone Canyon Creek within the City Of Poway, Hydrologic calculations were performed using HEC-HMS to generate Inflow hydrographs at various points of interest for use In the subsequent hydraulic modeling. The hydraulic analyses consisted of modeling storm drains, culverts, Stolle Canyon Creek, and Its tributary using XP-SWMM. Storm drains, culverts, and the main channel of Stone Canyon Creek and its tributary were analyzed tinder unsteady, one-dimen$10nal flow a$surfllotlons. Shallow flow resulting from culvert and storm drain overflow and Stone Canyon Creek overbank flow were modeled In two-dirrienslons. Camarillo Center Hydrologle/Hydraulics Study I California Conservation Corps Project engineer who assisted in performing hydrologic and hydraulic analyses to evaluate various flood control mitigation alternatives for the existing facilities at the Calilornle Conservation OOrPs'(CCC) Camarillo Center In Venture County, California. In March 2011, the Camarillo Center experienced a rain event that generated aPPrOxImately 5-6 Inches Of Precipitation. The off -site drainage conditions created significant flooding issues as off -site drainage ditches laoked adequate Capeoltyfor this large event. The hydrologic and hydraulic portions of the study evaluated various storm events, Including the 100-year. 24-hour storm.