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CRAIG A SMITH & ASSOCIATES 7n7 Glades Road. Suite 41 0 . Boca Raton, Florida 33434 tONjUj.T1NG.ltiGINEERS .. ~U~ORS ... unUTY LOCATORS .. GRANT SPECIALlm Mr. I..:iIOVanm l:latista, P.E., C.G.C. Public Works Director/City Engineer City of Sunny Isles Bea~h 18070 Collins Avenue Sunny Isles Beach, FL 33160 WWW.CRA1GASMITH.COM RE: 174lh Street Storm Water Improvements Dear Mr. Batista, Per our December 12, 2011 proposal to you, we have performed and concluded the investigative portion of Phase 1. As proposed, we performed investigation inclusive of both records research and field investigation. Records research proved to be lacking in information, so the majority of the work completed was very labor intensive as our field crews were not verifying record information provided, but rather finding what storm water infrastructure exists above and below ground. -We began our research by requesting information from Sunny Isles Beach; Florida- Department of Transportation, Miami-Dade County and South Florida Water Management District. We simultaneously deployed our field crews utilizing the limited . information provided by the City to determine what facilities exist in and around the project area on 174th Street. . The surface features including the roadway storm water inlets on 174th were easily discovered, however the subsurface features were a bit more of a challenge to determine the location, length, size, type, etc. We were able to utilize both our inspection crews and utility location crews to make the necessary determinations. Our inspection crews assisted with their knowledge and experience while our utility locates crews were able to use their tools including Ground Penetrating Radar, to determine the size and length of the underground storm water pipes. The good news is that there are quite a few storm water inlets on 174lh Street which are standard FOOT style curb inlets. The bad news is that the majority of the existing inlets on 174lh Street are not interconnected. This means that the inlets typically do not connect via pipes which eventually discharge into the intracoastal waterway. For the most part each inlet was constructed with a short length of perforated pipe (10 to 20 feet) in each direction from the underground structure with an exfiltration trench surrounding it to allow the storm water entering the inlet to soaklexfiltrate into the ground. The other good news is that despite the fact that interconnected pipe is lacking on 174lh Street, there are positive outfalls which exist at North Bay Road and between. the two most eastern condominiums on the south side of 174lh Street. I have attached a sketch of the inspected areas with the information requested to give you an idea of what current storm water facilities exist on 174lh Street. We have provided this information with an aerial background to make it easy for viewing. 954.782.8221 -561.791.9280 95 4 .786. a , 2 7 Attachment "Au <'" I I', ~ n , I fJ Phone F .. -561.314