Plan requirements are divided into the following categories based upon the level of site disturbance and impervious surfaces:
A. No Plans Required: The following activities are subject to the performance standards of section 7-2-8 of this chapter, but are not required to file sedimentation, erosion control, or stormwater plans with the City. A checklist ensuring compliance with performance standards shall be submitted by the applicant to the City for all activities requiring building permits.
1. New construction, additions or modifications to existing structures in which all the following criteria are met:
a. Not within three hundred feet (300') of any surface water, shown on the National Hydrography Dataset or by actual survey.
b. Not on a slope of fifteen percent (15%) or greater.
c. New impervious surface created by the construction does not exceed one thousand (1,000) square feet.
d. Area of land-disturbing activities created by construction does not exceed five thousand (5,000) square feet.
2. Excavation, fill, grading, or other earthwork activities in which all the following criteria are met:
a. Not within three hundred feet (300') of any surface water, shown on the National Hydrography Dataset or by actual survey.
b. Not on a slope of fifteen percent (15%) or greater.
c. Does not result in more than fifty (50) cubic yards of fill or excavated material.
d. Does not result in more than five thousand (5,000) square feet of disturbed area.
e. Changes in grade do not exceed four feet (4') in height.
3. Minor subdivisions, as defined by title 9 of this Code, that will not result in the creation of new roads, pathways, sidewalks or similar infrastructure impervious surfaces.
B. Minor Plan: A sedimentation and erosion control plan shall be submitted prior to the commencement of any construction or site disturbance for low-impact developments that meet the following criteria:
1. Excavation or fill that will result in more than fifty (50) cubic yards but less than two hundred fifty (250) cubic yards of material.
2. Construction or reconstruction of structures, paving, or other activities that will create more than one thousand (1,000) square feet but less than two thousand (2,000) square feet of new impervious surface.
3. Land-disturbing activities that will result in more than five thousand (5,000) square feet of disturbed area but less than ten thousand (10,000) square feet of disturbed area.
4. Excavation, fill, construction, reconstruction, or land disturbing activities on sites that are within three hundred feet (300') of any surface water, shown on the National Hydrography Dataset or by actual survey, or on a slope of fifteen percent (15%) or greater and do not exceed any of the following:
a. One thousand (1,000) square feet of new impervious surface.
b. Five thousand (5,000) square feet of land-disturbing activities.
c. Fifty (50) cubic yards of fill or excavated material.
d. A four foot (4') change in grade.
C. Major Plan: A Stormwater Management Plan shall be submitted prior to the commencement of any construction or site disturbance for developments that meet the following criteria:
1. Fill or excavation that will result in two hundred fifty (250) cubic yards or more of material.
2. Construction or reconstruction of structures, paving, or other activities that will create two thousand (2,000) square feet or more of new impervious surface.
3. Land-disturbing activities that will result in ten thousand (10,000) square feet of disturbed area or more.
4. Excavation, fill, construction, reconstruction, or land disturbing activities on sites that are within three hundred feet (300') of any surface water, shown on the National Hydrography Dataset or by actual survey, or on a slope of fifteen percent (15%) or greater slope that exceed:
a. One thousand (1,000) square feet of new impervious surface.
b. Five thousand (5,000) square feet of land-disturbing activities.
c. Fifty (50) cubic yards of fill or excavated material.
d. A four foot (4') change in grade.
D. Subdivision Plan:
1. All new subdivisions and phases of existing subdivisions shall provide a preliminary stormwater management plan at the time of preliminary plat application, unless otherwise provided herein. The final stormwater management plan, consistent with subsection E3 of this section, shall be filed with the subdivision construction plans, prior to any site disturbance, in accord with the subdivision regulations of title 9 of this Code.
2. Development of lots shall be in accord with the approved subdivision stormwater management plan. At the time of building permit application, the landowner shall provide plans indicating how the lot will be developed to meet the requirements of the approved plan.
3. For subdivisions that do not have approved stormwater management plans, lot development is subject to section 7-2-6, "Applicability", of this chapter and the applicable requirements of this chapter.
E. Application Contents: Applications shall be accompanied by a fee, as established by resolution of the City Council. For each type of plan, the contents are as follows:
1. Sedimentation And Erosion Control Plan (Minor Plan):
a. A project site plan showing the limits of proposed construction, location of proposed and existing structures, walkways, driveways, roads, surface water, wetlands, vegetative coverage, any proposed soil stockpiles, drainage patterns, and existing or proposed sedimentation/erosion control and stormwater features.
b. A summary of the proposed construction project, including methods to stabilize soils and control sedimentation during and after construction, erosion control features, use of existing and proposed vegetation.
c. Proposed construction schedule.
d. Maintenance and monitoring plans, to include requirements for inspection before, during, and after storm events.
2. Preliminary Stormwater Management Plan Contents:
a. The stamp and/or signature of the design professional who prepared the plan.
b. A project site plan showing the entire area covered by the application, any construction sites, proposed or existing lot lines, existing drainage patterns, surface water, proposed roads, proposed stormwater easements, proposed stockpile areas, sufficient topographic information to shown contours of the land, constraining environmental conditions and areas to be covered by impervious surfaces at completion of the project.
c. A project summary describing site characteristics, soil types, vegetative coverage; slopes, calculations of the estimated impervious surface coverage, design storm yield for the site; and proposed stormwater and erosion control features.
3. Stormwater Management Plan (Major Plan):
a. The items required for a preliminary stormwater management plan, listed at subsection E2 of this section.
b. Construction-quality drawings of all physical features of a proposed stormwater management system, including dimensions and capacities for all conveyances, retention basins, swales, and other features designed for collection, treatment, and infiltration of stormwater runoff.
c. A proposed construction schedule for the stormwater management system.
d. A sedimentation and erosion control plan.
e. A proposed system of maintenance and inspection schedules for the stormwater management system, designating specifically any portions which are to be conveyed to a group, association, or political subdivision for maintenance. (Ord. 214, 5-2-2017)