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Page 2 of 3 Oslo Boat Ramp — Reduced Scope of Construction BCC Agenda Item for February 13, 2018 ➢ Staff recommends that millings be applied to the existing roadway cross-section to reduce the runoff of turbidity into the lagoon. Asphalt millings are not considered to be an impervious material as it does not have the same characteristics of asphalt pavement. Both the District and the ACOE have indicated that using a pervious material on the roadway would likely reduce the determination time for permit approval. ➢ The permitting of additional channel markings can be accomplished by staff. Also at the Commission Meeting the Board directed staff to meet with City of Vero Beach staff to discuss the possibility of a joint venture for a Mainland Boat Launch, at the old power plant site, as a possible alternative to improvements_ to the Oslo Boat Ramp. The Chairman and the County Administrator met with Councilman Lange Sykes and the City Manager to discuss the possibility of this joint venture. A Mainland Boat Launch concept plan (see attached) was provided to the County by City staff and County staff reviewed the sketch and found that there will be significant permitting issues associated with this location. ➢ One of the main issues that needs to be evaluated is compliance with the County Manatee Protection Plan (MPP). The MPP currently prohibits new boat ramps in areas that are deemed both high manatee use and high watercraft -related manatee mortality areas. Recent calculations performed by staff show that the Power Plant location is not in a high manatee use area, as defined in the MPP. The location is, however, in a high watercraft -related manatee mortality area, which may result in design restrictions by permitting agencies. Under the MPP, new boat ramps are also prohibited where the site is located where the footprint of the new boat ramp (including turning basins and ingress and egress pathways) has submerged aquatic vegetation coverage (SAV) of 10% or greater. Although there does not appear to be SAV coverage in the vicinity of the Power plant that would trigger the SAV restriction, that will need to be verified. The FWC once designated the canals adjacent to the Power Plant as one of eight manatee "safe haven" areas in the state due to the warm water discharge from the plant that occurred in the past. Staff will need to determine how state and federal staff will now look at this location since the source of warm water is no longer available due to the decommissioning of the power plant. ➢ The concept of filling in the north -south finger canal at the water treatment plant for parking, as shown on the concept plan, is problematic and likely a nonstarter for permitting agencies. It also appears to conflict with Criterion 1.3.4(a) in the MPP, which does not allow more than 100 linear feet of native shoreline vegetation to be altered (trimmed, cut, removed, killed, or destroyed). ➢ The proposed Mainland Boat Launch site is approximately 3.1 miles north of the existing Oslo Boat Ramp. This could preclude or deter some boaters from using the proposed Mainland Boat Launch due to the proximity of the site to a highly traveled area of the City. 224 C:\Users\legistar\AppData\Local\Temp\BCL Tech nologies\easyPDF 8\@BCL@F40D059A\@BCL@F40D059A.doc