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CARTER ASSOCIATES, INC. <br />CONSULTING ENGINEERS AND LAND SURVEYORS <br />1708 21 sF STRF,F;17 <br />VERO BEACH, FLORIDA 32960-3472 <br />772-562-4191 <br />772-562-7180 (FAX) <br />August 20, 2008 <br />MARVIN <br />F.. CARTER, <br />P.S.M. <br />DEAN F. <br />LUFI FUE, <br />P.E. <br />irispuri <br />13 <br />r,wm.�J{Y�JlIN 11. BI UM, P.F <br />'- DAVID t 111�UETH.IF, P.S.Al- <br />G. SEAN MCGUIRE, P.E. <br />GEORGE SIMONS, P.E. <br />AUG 1 ���$ STEVF? SNOBERGFR, 1'.F,. <br />PATRICK S. WAI-IIIL'R. P.E. <br />Mr. Christopher J. Kafer, Jr., P.E., County Engineer INDIAN R i V ` IJNTY <br />Indian River County Engineering Division E N G I N E E R I G` 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`h Street and the water service connection will be <br />re -designed to connect to a 16" diameter water main on the north side of 77`h 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 />-AIScrv7 nig Florida <br />s1rice 1911 <br />