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7 <br /> CARTER ASSOCIATES , INC . <br /> CONSULTING ENGINEERS AND LAND SURVEYORS <br /> 1708 21 sF STRF, F;17 MARVIN F.. CARTER , P. S . M . <br /> VERO BEACH , FLORIDA 32960-3472 DEAN F. LUIS"LHJE, P. E. iris N( . <br /> 772-562-4191 <br /> 772- 562 -7180 ( FAX ) Nli 1 .S ( IiCCURFSF. P. S . M . <br /> � � LME NFIIIGOOD , PI <br /> Au st 20 2008 DAVID L . LUETHJF. , P. S . l - <br /> G . SEAN MCGUIRE , P. E. <br /> GEORGE SIMONS , P. E . <br /> AUG 2 12008 STEVF? SNOBERGER , F'. F,. <br /> PATRICK S . WALIHER , P.E. <br /> Mr. Christopher J . Kafer, Jr. , P . E . , County Engineer INDIAN R i V ` <br /> G IJNTY <br /> Indian River County Engineering Division E N G I N E E R I ` SIU N <br /> 1801 27`h Street RECD BY: <br /> Vero Beach, FL 32960 <br /> Re : Indian River County Parks Maintenance Complex (CAI Project No . 05 -60E) <br /> Supplemental No . 2 to Work order No . 1 to the Professional Civil Engineering Services Agreement <br /> Dear Chris : <br /> We are pleased to present this proposal for additional services relative to re-designing the stormwater <br /> management system and the potable water service connection for the project. All provisions of the original <br /> Work Order No . 1 to the Professional Civil Engineering Services Agreement (dated January 9 , 2007) , <br /> including Supplemental No . 1 , shall remain in full force and effect, unless otherwise specifically modified <br /> herein . A man-hour fee estimate is attached as Exhibit "A" for your use . The following describes our <br /> proposed scope of services and terms of agreement between Carter Associates, Inc . (Engineer) and Indian <br /> River County (County) : <br /> Stormwater Management System : <br /> The stormwater management system will be revised to comply with the phosphorus loading analysis <br /> requirements stipulated as item L in the SJRWMD ' s letter of 2/21 /08 . This analysis requirement has been <br /> applied by the SJRWMD to this project since the North Canal drainage basin has recently been classified as <br /> an impaired water body , This requirement is a change in the permitting process that could not have been <br /> anticipated and was not included in the original scope of professional services . <br /> The stormwater management system will also be revised to utilize the wet detention system methodology in <br /> lieu of the stormwater re-use alternative method in order to remove the automatic shut-off/turn-on switch <br /> requirement for the irrigation pump, as is stipulated as item 21 in the SJRWMD ' s letter of 4/ 16/08 . This <br /> requirement is also a change in the permitting process that could not have been anticipated and it requires a <br /> re-design of the previously designed and submitted plans and calculations . The project documents will be <br /> modified as follows : <br /> • Revise the Paving, Grading and Drainage Plan to call out revised stormwater pond control structure <br /> weir elevations and show revised permanent pool contours . <br /> • Revise the control structure detail . <br /> • Revise and update the stormwater calculations report . <br /> • Submit revised plans and calculations to the SJRWMD and IRC Engineering Dept. <br /> Water Service : <br /> A fire hydrant will be added at the project frontage along 77"' Street and the water service connection will be <br /> re -designed to connect to a 16" diameter water main on the north side of 77Th Street. This water main is <br /> currently shown on the project plans and the Utilities Department as-builts as a brine line . The brine line will <br /> - AIScrvin9 Florida <br /> sirice 1911 <br />