2008-356C - Laserfiche WebLink

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Engineering: This application is for proposed improvements to existing paved public roads in Indian River County. The roadways include 5th Street S.W. and 43rd Avenue and the improvements include widening and raising the grades in the vicinity of the intersection of the two roads. Also, a new bridge will be constructed over the Indian River Farms Water Control District (IRFWCD) B-6 Canal just east of the intersection. The improvements will be served by a new surface water management system, which includes five roadside retention areas. These areas correspond to five drainage basins labeled N43SB1 P, N43SB2P, N43NB1 P, N43NB2P, and NSEBP. These basins correspond to the west and east sides of 43rd Avenue, north and south of 5th Street S.W., and the r -o -w on the north side of 5th Street S.W., respectively. Each basin has its' own discharge structure which is designed as an FDOT Type E Inlet with the top of grate set at the treatment volume elevation. Attenuation is provided for the 25 -year, 24-hour storm event. Site Description: The project area consists of portions of 43rd Avenue and 5th Street SW near the intersection of the roads, and the associated roadside ditches. The ditches amount to 1.95 acres within the project area. These surface waters have little to no emergent vegetation, and sparsely vegetated, steep banks. Impacts: 12.2.2 states that an applicant "must provide reasonable assurances that a regulated activity will not impact the values of wetland and other surface water functions so as to cause adverse impacts to: (a) the abundance and diversity of fish, wildlife and listed species; and (b) the habitat of fish, wildlife and listed species. The applicant proposes to improve the existing crossing by 5th Street S.W. of the 43rd Avenue ditch in accordance with the other roadway improvements. This reconstructed crossing will result in 0.08 acres of potentially adverse shading impacts to the surface water. However, the current crossing already shades the affected area. Furthermore, the affected system is considered to be an upland -cut ditch and, as such, does not require review under most provisions of Section 12.2 in the Applicant's Handbook. Secondary impacts: Section 12.2.7 A. H. contains a four part criterion which addresses additional impacts that may be caused .by a project: (a) impacts to wetland functions that may result from the intended use of a project; (b) impacts to the upland nesting habitat of listed species that are aquatic or wetland dependent; (c) impacts to significant historical and archaeological resources that are closely linked and causally related to any proposed dredging or filing of wetlands or other surface waters; and (d) wetland impacts that may be caused by future phases of the project or activities that are closely linked and causally related to the project. The surface waters affected by this project do not require consideration for secondary impacts. There is no upland -nesting habitat for wetland -dependent listed wildlife species on the property. In consultation with the Division of Historical Resources, District staff