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I Agency - Assessment rcquirements: I . DERM - Biological Assessment (BA). · USACOE - Pcrmit Sketches and acrcage/fill calculations as well as BA. · NMFS - EFH Assessment and review USACOE permit applicationlBA. I · USFWS - Review USACOE permit application and BA. · SFWMD - Permit Sketches and acreage/fill calculations and BA. Benthic survey of canal bottom and intertidal zone: will be necessary both under and to either side of bridge and I boardwalk alignmcnts (basis of agency assessments/surveys above). Aesthetics, Architecture and Landscaping Aesthetic lighting is planned for each bridge scheme to ensure that the bridges appear as light sculptures at night. Light sources are located in the deck support ribs to illuminate the arches. Additional fixtures in thc handrails illuminate the footpaths in a continuous wash of light. Lighting also plays an important role in underlying the charactcr of the piazza as a public gathering place. Landscaping concepts will also be developcd taking into consideration native vegctation and a consistcnt themed design. . . , . Roadway Approach Areas On either side of the bridge there are "connection areas" that must be designed taking into considcration items such as pavement surt~\ce/type, stormwater runoff, on-street parking and street amenities. For the "interim" condition there are many morc materials that can be utilized for pavement type and will be controlled more by pedestrian plaza features. For stormwater trcatment there are several options available but a low-cost, low-maintenance yet visually appealing solution is preferred. Currently stormwater run-off is collected via curb inlets and discharged directly into the adjacent waterway without proper treatment. On the south side of the canal, most of the run-off is collected by valley gutter and retention swales adjacent to the local road. On-strcet parking has been maintained as "replacemcnt" parking and to keep vehicle speeds low (in the ultimate condition) but can easily be converted to additional pedestrian space if desired or necessary. Street amenities (furniture, lighting, etc.) will be designed to be consistent with exiting strect and park amenities that are located within the projcct limits. Utility coordination is anticipated on both sides of the waterway. I I I During GF's coordination meeting with Mr. Manny Tobon of DERM, the design policy for bridge and road reconstruction was discusscd and it is mandatory policy for road reconstruction to retain 100% of the first inch of run off on site. Based on this design regulation, GF analyzed two innovative drainage alternatives that could be incorporated in this project to comply with DERM's policy. I I Alternative I (Preferred) · North of the existing canal, the proposed roadway typical section would consist of 2-11 ft lanes, 7ft of parallel parking on the west side of the street, a total of 21 ft of swales distributed on both sides of the road and 5' of concrete sidewalk, also on both sides of the street. · The first inch of runoff would be retained in the swales and the excess volume would be discharged through ditch bottom inlets to the existing canal. · Sincc the run off generatcd on the south section of the canal is negligible, the excess volume would be collccted via curb inlets and discharged into the existing swales on the north side of the intersecting local street. This proposed drainage design for the south section would be applicable for alternatives I and II. Alternative II · North of the existing canal, the proposcd typical section would consist of 2-11 ft lanes, 7ft of parallel parking, 7 ft of swales and 5 ft. of sidewalk on both sides of the street. · Since the proposed swales on this typical can not handle the first inch of nm off on site, in order to comply with DERM's policy, we would recommend the construction of a gravity well with an emergency overflow structure into thc existing waterway. I I I I I Once the project has been awarded, GF can discuss recommended alternatives with the Project Manager for the City of Sunny Isles Beach and determine the appropriate course of action based on thc scope of work and allocated constmction budget for the project. I I