§ 4-166. Design requirements.

(a)

Grading, erosion control practices, sediment control practices, and waterway crossings shall meet the design criteria set forth in the most recent version of the city's stormwater pollution prevention plan (SWPPP), and shall be adequate to prevent transportation of sediment from the site to the satisfaction of the City of Tuscumbia. Cut and fill slopes shall be no greater than 3:1, except as approved the City of Tuscumbia to meet other community or environmental objectives.

(b)

Clearing and grading of natural resources, such as forests and wetlands, shall not be permitted, except when in compliance with all other chapters of this Code. Clearing techniques that retain natural vegetation and drainage patterns, as described in the SWPPP, shall be used to the satisfaction of the City of Tuscumbia.

(c)

Clearing, except that necessary to establish sediment control devices, shall not begin until all sediment control devices have been installed and have been stabilized.

(d)

Phasing shall be required on all sites disturbing greater than thirty (30) acres, with the size of each phase to be established at plan review and as approved by the City of Tuscumbia.

(e)

Erosion control requirements shall include the following:

(1)

Soil stabilization shall be completed within five (5) days of clearing or inactivity in construction.

(2)

If seeding or another vegetative erosion control method is used, it shall become established within two (2) weeks or the City of Tuscumbia may require the site to be reseeded or a non-vegetative option employed.

(3)

Special techniques that meet the design criteria outlined in the SWPPP on steep slopes or in drainage ways shall be used to ensure stabilization.

(4)

Soil stockpiles must be stabilized or covered at the end of each workday. Silt fence may be used. Silt basins may also be used.

(5)

The entire site must be stabilized, using a heavy mulch layer or another method that does not require germination to control erosion, at the close of the construction season.

(6)

Techniques shall be employed to prevent the blowing of dust or sediment from the site.

(7)

Techniques that divert upland runoff past disturbed slopes shall be employed.

(f)

Sediment controls requirements shall include:

(1)

Settling basins, sediment traps, or tanks and perimeter controls.

(2)

Settling basins that are designed in a manner that allows adaptation to provide long-term stormwater management, if required by the City of Tuscumbia.

(3)

Protection for adjacent properties by the use of a vegetated buffer strip in combination with perimeter controls. The buffer strip shall be used only if required by the city engineer.

(g)

Waterway and watercourse protection requirements shall include:

(1)

A temporary stream crossing installed and approved by the Army Corp of Engineers if a wet watercourse will be crossed regularly during construction.

(2)

Stabilization of the watercourse channel before, during, and after any in channel work.

(3)

All on-site stormwater conveyance channels designed according to the criteria outlined in the SWPPP.

(4)

Stabilization adequate to prevent erosion located at the outlets of all pipes and paved channels.

(h)

Construction site access requirements shall include:

(1)

A temporary access road provided at all sites.

(2)

Other measures required by the City of Tuscumbia in order to ensure that sediment is not tracked onto public streets by construction vehicles or washed into storm drains.

(Ord. No. 15-0817B, 8-17-2015)