Grading Plan Requirements - Type II

Permit Application Guidelines for New Single-Family Residential Homes
Properties Not Within Stormwater Special Management Areas*

(Disturbed area greater than 5,000 square feet)

Required Submittals/Grading Plan Requirements
DuPage County Stormwater Management Certification Application (PDF)

The following documents, forms, and/or permits must be submitted prior to plan review. Applicant’s performing work of this type shall apply for an Application for Permit from the Building and Code Reinforcement as well as meet the requirements of the Engineering Department as outlined below.

Grading Plan:
Two (2) copies of a site grading plan prepared by a professional land surveyor or engineer registered in the State of Illinois. The site grading plan shall be based on a boundary survey prepared within the past year. The plan shall either be signed by the surveyor or the survey attached to the grading plan. The site grading plan must be at an appropriate scale (e.g.: 1"=10’, 1"=20’, or 1”=30”); reduced copies will not be accepted. The grading plan must show ground topography and structure foundations by elevations and maximum one-foot contour intervals over the site and including all areas 100 feet beyond the site. Topographic information on the site and areas abutting or adjacent to the site must show existing drainage patterns and the drainage course that may affect, or be affected by the development of the site. This may require additional topography and/or extensive stormwater drainage studies.

1. The site grading plan shall indicate and label all existing and proposed structures with dimensions, including setback distances to property lot lines.
2. The site grading plan shall indicate all existing and proposed utilities and easements. Structures that include a new sump pump discharge(s) must provide a 4” minimum storm sewer service connected to a storm sewer and must discharge the sump pump(s) into this service or construct a drywell per city standards and discharge the sump pump(s) into the drywell, if a storm sewer is not available.
3. The site grading plan shall indicate the existing top of foundation elevation of the principal structure on the property. The site grading plan shall be based on a benchmark referenced to DuPage County datum. Benchmarks utilized shall be clearly indicated on the site grading plan. In cases where extensive grading, depressional storage, or other such special drainage conditions exist, a final grading survey indicating compliance with the grading plan must be submitted prior to the issuance of a certificate of occupancy. A security deposit shall be required to insure compliance with this permit requirement.
4. The site grading plan must show the location of all existing structures and land features abutting or adjacent to the site (sheds, garages, fences, etc.) including their top of foundation and finish grade elevation.
5. The site grading plan must show the proposed top of foundation elevation at least six inches (6”) above the finish grade elevation of the proposed improvement and water must drain away from the structure. The foundation must be dimensioned including setbacks to the side and front property lines.
6. The site grading plan must show proposed drainage patterns or drainage courses by depicting any changes in grade elevation by illustrating proposed (solid or bold lines) and existing (dashed or fine lines) contours and/or elevations (such as garage floors, swales, property corners, and property lines).
7. The site grading plan must show all other proposed site improvements such as driveways, patios, and/or service walks with proposed grades.
8. The site grading plan must show a perimeter silt fence and provide a silt fence detail.
9. The site grading plan must show a concrete washout location and provide a concrete washout detail.
10. All Development Projects are now required to have an Impervious Area Calculation as per the revised DuPage County Stormwater Ordinance. The calculation should follow the following example and be all impervious area that is on the property. (Note: In some cases the Net New Impervious Area ISnegative)
    Total Existing Impervious Area =

    1500 sq ft

    Total Proposed Impervious Area =

    1750 sq ft

    Net New Impervious Area =         

      250 sq ft
11. On projects that include more than 2,500 square feet of net new impervious areas Volume Control and Post Construction BMPs shall be designed and installed pursuant to sections 15-64 &15-65 of the Countywide Stormwater Management Ordinance.
12. The land surveyor or engineer preparing the grading plan shall investigate and identify any local topographical depression and include the high water elevation and overflow location(s) on the site grading plan. A statement shall be added to the plan that the land surveyor or engineer has reviewed and identified any local topographical depression. Furthermore, the land surveyor or engineer shall certify that the proposed improvements have been designed so as to not displace any ponding or standing water, or not change the drainage of surface waters, or that adequate provisions have been incorporated into the site grading plan so as to not adversely affect the drainage of stormwater to, or from, the site and abutting or adjacent properties.

Erosion Control Plan:
Two copies of a sediment and erosion control plan based on the site grading plan described above. This can either be a supplemental drawing or incorporated into the site grading plan.

1. The sediment and erosion control plan shall indicate the location of site erosion control measures such as perimeter silt fencing, storm sewer inlet protection, and /or other acceptable and practicable erosion control measures. NOTE **: Section 22-6 of the Building Code requires safety fencing to be installed using a 6’ tall chain link fence. We recommend that the silt fence be installed outside the chain link fence to protect it during construction.
2. The sediment and erosion control plan shall indicate a stabilized construction entrance to prevent the deposit of soil onto the public or private street adjacent to the site. Any soil deposited on the public or private street shall be removed prior to the end of each workday or as may be directed by a City Inspector.
3. The sediment and erosion control plan shall indicate a schedule for the placement of temporary and permanent soil stabilization methods and the location of any soil stockpiles.
4. The sediment and erosion control plan shall provide notes regarding pumping or dewatering excavation and filtering the pumped water through filter bags or other approved methods for removing sediments.
5. On-site plans where concrete is being poured, the plan shall indicate a concrete washout area in conformance with IEPA regulations.

Stormwater Management Permit:
The permit applicant shall be required to complete a DuPage County Stormwater Management Certification Application (PDF) and post a cash security bond to ensure that the provisions of the City Code are adhered to by the applicant during the course of construction until final occupancy is acquired.

• The City of Wheaton is a Partial Waiver Community under the provisions of the DuPage County Countywide Stormwater and Flood Plain Ordinance. Any site affecting a Stormwater Special Management Area (defined by ordinance as floodplains, wetlands, and riparian environments) shall be required to obtain permit certification from the DuPage County Department of Development, Division of Environmental Concerns prior to the City issuing a Stormwater Management Permit.
• If sidewalks do not exist in the vicinity of the new building a sidewalk donation is required pursuant to Section 58-74(a). This donation is $10.00 per square foot or $45.00 per linear foot as of January 1, 2014.

Demolition:
Properties, where an existing structure was demolished, are subject to additional requirements.

1. Submit a tree preservation plan for all trees over six inches in diameter. This must be shown on the grading plan and all grading and utility installation should take place away from the drip line of the tree to be preserved or alternate methods proposed such as augering utilities.
2. Provide a traffic control and parking plan. The existing driveway should remain in place for construction access until the new driveway is constructed. This plan should limit contractor parking to one side of the roadway only. The traffic plan should indicate a truck route for delivery of material entering or leaving the site.
3. Show the location of the portable toilet and material storage area.

**Sec. 22-6. Safety fencing.

1. All construction sites shall be enclosed by a continuous chain link fence, without barbs, six feet in height which shall be installed around the perimeter of the area under construction herein referred to as "construction site." The fencing shall be installed not more than seven days before the commencement of any work on the construction site. Such fencing shall remain in place until a certificate of occupancy is issued for the structure, or as so authorized by the code official.
2. Construction site means any or all portion of the real property that is identified as the location of any excavation or of the erection, enlargement, alteration, repair, removal, or demolition of any building, structure or structural part thereof within the city. However, for purposes of this section, "construction site" does not include a location where all construction and/or demolition activity, including the staging of construction materials and storing of debris, is conducted within a completely enclosed secured structure, or a construction site that will be occupied during the construction activity.
3. The safety fencing shall be anchored sufficiently to resist wind loads of 30 pounds per square foot without deflection of more than three inches between top and bottom of the fence. The fence shall not contain any advertisements and "No Trespassing" signs shall be mounted on the fencing in a conspicuous location around the site. Access openings in such fencing shall be protected by gates that are normally kept closed during the day and secured by lock when there is no construction activity.

Revised 4/1/2020