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Home My WebLink About2002 - Request Additional InformationSt. Johns River Water Management District Kirby B. Green 111, Executive Director • John R. Wehle, Assistant Executive Director • Mike Slayton, Deputy Executive Director John Juilianna, Palm Bay Service Center Director, Regulatory 525 Community College Parkway S.E. - Palm Bay, FL 32909 - (321) 984 -4940 September 11, 2002 CERTIFIED MAIL: 7002 0460 0003 7735 7436 The LPA Group, Inc. Attn: Mark Jansen 12000 Research Pkwy, Ste. 152 Orlando, FL 32820 Re: T- Hangar Development/Access Roads Application No. 40- 061 - 68172 -3 (Please reference the above number on any submittal.) Dear Mr. Jansen: The staff has reviewed your response to the District's Request for Additional Information (RAI) letter. Unfortunately the following technical information is lacking to sufficiently review the possible impacts the project may have on the surrounding area. This information is again being requested pursuant to the authority vested in the St. Johns River Water Management district under subsection 373.413(2), Florida Statutes (F.S.), and sections 40C -4.101 and 40C- 4.301, Florida Administrati ✓e Code (F.A_C.). In order to expedite the review of your application, please use the application number referenced above on all correspondence, and submit three (3) copies of all requested information unless otherwise indicated by a specific information request. It has been determined that the proposed stormwater pond adjacent to the existing wetland and wetland area to be restored will have a drawdown effect on the wetland. Please be advised that this is considered a wetland impact. Please demonstrate that the wetland hydrology will not be impacted or provide additional mitigation. [section 12.2.2.4,12.2-7, A.H.] Roadside ditch /underdrain s stem general comments: 1. Please show the proposed elevation of the ditch bottom on the plan and profiles. Show the underdrain in the pavement cross- section and note where applicable. [40C -4.301 (1) F.A.G.] 2. Please provide justification for the permeability rate of 1 ft/hr used in the underdrain calculations. The geotechnical report indicates k values in the range of 1.33 -1.35 ft/day. [40C- 42.026 (2) F.A.C.] Section 10 +70 to 15 +30: GOVERNING BOARD Duane Ottenstroer, CHAIRMAN Ometrias D. Long, VICE CHAIRMAN R. Clay Albright, SECRETARY David G. Graham, TREASURER JACKSONVILLE APOPKA EAST LAKE WEIR JACKSONViUE W. Michael Branch Jeff K. Jennings William Karr Ann T. Moore Catherine A. Walker FERNANCINA BEACH MAITLAND MELBOURNE BEACH BUNNELL ALTAMONTE SPRINGS 1. What is to prevent the roadside ditch from outfalling to the Roseland Road swale? [40C -4.301 (1) F.A.C.] 2. The inverts of CO -1 and CO -2 are shown to be at elevation 10.35 feet. The cross- section indicates the depth from the bottom of the ditch to the invert of the pipe to be 2.58 feet (2' native soil + 3" gravel + 4" pipe). This would dictate an invert at elevation 9.77 feet. [40C- 42.026 (2) F.A.C.] 3. The ditch block is called out at elevation 14.0 feet on sheet C5.1, however; the treatment volume is retained at elevation 12.65 feet per the stage storage chart and the underdrain calculations are based on the ditch block at elevation 12.65 feet. Please clarify. [40C- 42.026 (2) F.A.C.] Section 20 +50 to 26 +50: 1. Please show the stations on the bottom of the profile on sheet C5.2 and the location of the cross culverts in the profile. [40C -4.301 (1) F.A.C.] 2. The inverts of CO -3 and CO -4 are shown to be at elevation 8.50 feet. The cross - section indicates the depth from the bottom of the Glitch to the invert of the pipe to be 2.58 feet (2' native soil + 3" gravel + 4" pipe). This would dictate an invert at elevation 7.92 feet. [40C- 42.026 (2) F.A.C.] 3. Sheet C2.1 shows MES 7 and MES 8 at an invert elevation of 9.50 feet, however; the ditch bottom is indicated at elevation 10.5 feet. Please clarify. [40C -4.301 (1) F.A.C.] 4. Inlet H -1 (existing type "H" inlet) has a grate elevation of 10.5 feet. Is this grate to be adjusted? If not, how will the treatment volume in this section be retained? [40C- 42.026 (2) F.A.C.] Section 60 +00 to 66 +40: 1. Please show the Swale contours and elevations on the plan view. [40C- 4.301 (1) F.A.C.] 2. The inverts of CO -5 and CO -6 are shown to be at elevation 14.8 feet. The cross - section indicates the depth from the bottom of the ditch to the invert of the pipe to be 2.58 feet (2' native soil' + 3" gravel + 4" pipe). This would dictate an invert at elevation 12.22 feet. [40C- 42.026 (2) F.A.C.] Section 72 +00 to 77 +92: Please show the swale contours and elevations on the plan view. [40C- 4.301 (1) F.A.C.] 2. The inverts of CO -7 and CO -8 are shown to be at elevation 14.28 feet. The cross- section indicates the depth from the bottom of the ditch to the invert of the pipe to be 2.58 feet (2" native soil + 3" gravel + 4" pipe). This would dictate an invert at elevation 13.70 feet. [40C- 42.026 (2) F.A.C.] 3. The "UNDER DRAIN DESIGN OF THE TREATMENT FACILITY" page is missing for this section of roadway, please include. [40C- 42.026 (2) F.A.C.] T- Hangar Site: 1. Please provide a node -link diagram. Additional comments, if any, will be forthcoming upon receipt and review of the diagram. [40C -4.301 (1) F.A.C.] 2. The maximum stage for N -4 is 14.29 and 15.31 feet for the mean annual and the 25 year events, respectively. As such, overflow will occur at MES 6 and enter the roadside system. Please review. [40C -4.301 (1) F.A.C.] 3. The note to the cleanout for the underdrain system is not legible. Please clarify. [40C -4.301 (1) F.A.C.] 4. Please indicate the length and inverts of the underdrain system in the retention area. [40C- 42.026 (2) F.A.C.] 5. Please provide a full size plan of the T- hangar site, sheet C2.1 and a full set of final plans. [40C -4.301 (1) F.A.C.] Please be aware, that suggestions or other direction provided by District staff are offered to assist applicants in complying with District rules. However, applicants bear the burden of demonstrating that their application meets the applicable rule requirements. Although District staff may provide suggestions to applicants that would allow staff to recommend approval of an application to the District Governing Board or senior staff, the final decision regarding the issuance or denial of a permit is up to the District Governing Board or senior staff. Applicants are hereby advised that the Governing Board and senior staff are not bound by previous statements or recommendations of District staff regarding an application. If the applicant desires to dispute the necessity for any information requested on an application form or in a letter requesting additional information, pursuant to section 373.4141, F.S., he or she may request an administrative hearing in accordance with section 120.57, F.S. Any petition for administrative hearing must comply with Chapter 28- 106 and section 40C- 1.1007, F.A.C, Please be advised, pursuant to section 40C- 1.1008, F.A.C., any application that has not been technically completed within one hundred and twenty (120) days from the date of receipt of a request for additional information by the District, will be prepared for an Intent to Deny at the next timely Governing Board meeting. If you require more than the allotted one hundred and twenty (120) days, please indicate this to the staff. In addition, no construction shall begin on the proposed project until a permit is issued by the St. Johns River Water Management District. This is pursuant to subsection 40C- 4.041(1), F.A.C., which states in relevant part, "... unless expressly exempt an individual or standard environmental resource permit must be obtained from the District under chapters 40C -4, 40C -40, 40C -42, 40C -44 or 40C -400, F.A.C. prior to the construction, alteration, operation, maintenance, removal or abandonment of any dam, impoundment, reservoir, appurtenant work or works... ". If you have any questions, please call Leigh Stewart or Karen Garrett-Kraus (321) 984- 4940. Sincerely, Karen Garrett- Kraus, Regulatory Scientist Department of Water Resources l� GlY Leigh ewart, PE, Senior Engineer Department of Water Resources cc: PDS /RAIL John Juiliann i� Fariborz Zan+neh Michelle Reiber City of Sebastian — Attn: Jason Milewski, Airport Mgr. 1225 Main St. Sebastian, FL 32958 St. Johns River Water Management District Kirby B. Green III, Executive Director -John R. Wehle, Assistant Executive Director -Mike Slayton, Deputy Executive Director John Juilianna, Palm Bay Service Center Director, Regulatory 525 Community College Parkway S.E. - Palm Bay, FL 32909 - (321) 984 -4940 July 18, 2002 Mr. Mark Jansen, P.E. The LPA Group, Inc. 12000 Research Pkwy, Ste. 152 Orlando, FL 32826 -3287 Re: T- Hangar Development/Access Roads Application No. 40 -061- 68172 -3 (Please reference the above number on any submittal Dear Mr. Jansen: The St. Johns River Water Management District has received your letter dated July 15 2002, requesting an extension to respond to the District's request for additional information dated April 23, 2002. The deadline will be extended by 60 days. If this is not sufficient, please contact me. Please note that the new deadline for submittal of the requested information is September 23, 2002. If you have any questions, please call me at (321) 722 -5365. Sincerely, Leigh Stewart, P.E. Department of Water Resources cc: PDS /E John Juilianna' Fariborz Zanganeh Karen Garrett -Kraus City of Sebastian — Attn: Jason Milewski, Airport Mgr. 1225 Main St. Sebastian, FL 32958 GOVERNING BOARD Duane Ottenstroer, CHAIRMAN Ometrias D. Long, VICE CHAIRMAN R, Clay Albright, SECRETARY David G. Graham, TREASURER JACKSONVILLE APOPKA EAST LAKE WaR JACKSONVILLE W. Michael Branch Jeff K. Jennings William Kerr Ann T, Moore Catherine A. Walker FERNANDINA BEACH MAITLAND MELBOURNE BEACH BUNNELL ALTAMONTE SPRINGS