Grading Plan Requirements - Type III
Subdivisions, Business, Industrial, Office, Institutional, Commercial Developments-Stormwater Management Plan Requirements Not Within Special Flood Hazard Areas
Stormwater management permits are required for all properties where the disturbed areas exceed 5,000 square feet or affect a special management area. See the stormwater management ordinance for more specific requirements. To apply for a building permit on a commercial property, industrial development, residential subdivision, or Planned Unit Development where a stormwater management permit is required, please submit the following:
In order to begin a review on a permit application for new construction or for a subdivision, business, industrial, office, institutional or commercial development, the applicant must submit all required submittal to the city thru the Permit Processor. These include all required Building Department submittals, zoning submittals if submitting for a subdivision of zoning change and a stormwater/site development permit which includes at a minimum, the items outlined under sections, 1, 2 and 3 below. Applicants for a subdivision or zoning change should consult with the Planning and Engineering Departments for any specific requirements.
- Current plat of survey/topographical survey (two copies)
A topographical/Boundary survey shall be prepared and submitted generally meeting ALTA requirements. Only full-size copies will be accepted. The survey must be to scale and shall generally not exceed 1"=20', or 1"=30'. Reduced copies will not be accepted. The survey be recent and shall have been prepared within the last year by a Professional Land Surveyor. The topography must be tied to a benchmark using DuPage County datum. When a County benchmark is not near the site, a site benchmark shall be established to control the work. The topographical survey must include a 100' overlap of surrounding property in the area of the improvements and indicate the location of all structures including top of foundation and the finish grade of the structure, all utilities within 100', top of curb and pavement elevations, all drainage structures, ways, ditches, sewers, culverts, or other improvements. The survey shall also indicate all existing easements or other encumbrances on the property or that may affect the property, including gas lines, electric lines, whether overhead or underground, communication lines, ducts etc.
These are minimum standards and some projects may require an investigation that is more extensive or topographical overlap to determine drainage ways, depressional storage areas, or other areas. A Current Title report should also be submitted, if available. This may be required in order to proceed with a review.
- Site Plan/Stormwater Management Plan (six copies)
- The application shall include a complete set of engineering plans, signed and sealed by a Registered Engineer in the State of Illinois. The plans shall be based on the above-referenced boundary survey and must indicate the proposed location and elevation of all existing and proposed buildings, structures, parking areas, and other features that affect stormwater drainage. The method of serving the property with utilities, including sanitary, water and storm sewer services or mains must be included on the plan. The plans must also include all necessary details meeting City of Wheaton standards and construction specifications pursuant to City of Wheaton criteria and Illinois State Law.
- The plans must include a proposed drainage plan depicting any changes in grade, and illustrating proposed and existing contours and control elevations. Such as top of curb elevations, swale elevations, etc. (See stormwater management report below). Cross sections of all roadways, detention areas or other areas as deemed appropriate for cut and fill comparisons.
- A stormwater pollution prevention plan/ sedimentation and erosion control plan (SWPPP) must be included and shall include, but not be limited, to silt fencing on the down slopes of the site. Other acceptable and practical methods may also be incorporated and utilized. Temporary and permanent vegetation is required to ensure that erosion is kept to a minimum. This plan must also include the Notice of Intent (NOI) as required by the IEPA for all sites greater than 1-Acre and prior to a permit being issued the approved ILR-10 permit must be received from the IEPA. (We recommend that an SWPPP booklet is prepared including the necessary inspection sheets that the contractor is required to fill out.) The plans shall include a stabilized construction entrance and the location of all topsoil stockpiles... Temporary and permanent soil stabilization methods such as matting/blanket installed on steep slopes, sodding, hydroseeding, seed/mulch. Note that Section 22-6 of the building code requires a 6’ chain link safety fence. We recommend that the silt fence be installed outside the safety fence to protect it during construction.
- Provide Best Management Practices (BMP’s) pursuant to the countywide stormwater management and include the mechanical BMP selection guide sheet form from the BMP guidance manual when using a mechanical BMP. The BMP and detention area must be included within a stormwater management easement granted to the city.
- The location, volume, and restrictor size of all detention facilities, the high water level of all facilities shall be shown and the base flood overflow routing. The plan must show the proposed incremental volume and release rate. Two copies of a stormwater management report in DuPage County Tabular format must be included. (see 3 below).
- The location of any Floodplains and/or Wetlands on or near the site must be clearly depicted on all drawings and submittals.
- Any landscape plan required by the Zoning Ordinance shall be attached and made part of the Final Engineering Plans.
- A parking lot lighting photometric plan meeting the City of Wheaton Zoning Ordinance requirements shall be included in the plans if required by ordinance.
- If a tree preservation plan is required, it shall be drawn on the grading plan and utility plan sheets to ensure that the trees to be preserved are not disturbed as part of construction this shall be submitted and made part of the final engineering plans. The plan shall include a table of all trees over 6” in diameter.
- Stormwater Management Report/Development Report/Permitting (two copies)
- A stormwater management report prepared in conformance with the DuPage County Stormwater Management Ordinance and/or City of Wheaton Stormwater Ordinance must be submitted. Hydrograph methods including outlet control routing must be included in the calculations including incremental volume and release rate calculations. The report must include a project narrative, including, but not limited to, an introduction, assumptions, size of development areas, runoff volume, and storage. The narrative may also require traffic information, erosion control, wetlands, floodplains, or other features that may affect the project. The report must be in DuPage County Tabular Format.
- Stormwater Management Permit application signed by the owner and applicant must be included
- Proposed schedule of construction, including construction and installation of sedimentation and erosion control, construction of detention facilities, paving, utilities, final landscaping.
- Engineer’s estimate of costs, including but not limited to, excavation (other than building), utilities, curbs, sidewalks, paving, site lighting, erosion control, and final landscaping.
- A $500.00 minimum review fee must be submitted for us to begin our review.
Prior to issuing a permit, the following items must be submitted, resolved, or approved.
- Preconstruction Meeting—Prior to any work on the project site or the issuance of a Stormwater Management Permit, a preconstruction meeting with the owner, general contractor and all site subcontractor shall be held in the City’s offices. No permit will be issued until said meeting has been held.
- Letter of Credit—The applicant must submit an Irrevocable Letter of Credit from an approved lending institution on a form supplied by the Engineering Department for 125% of the engineer’s estimate or 100% of signed and approved contracts.
- Payment of all fees—All fees must be paid in full as indicated by the ordinance approving the project, City of Wheaton code, any recapture fees, impact fees, and the 2% review and construction observation fee based on the engineer’s estimate. A $500.00 minimum fee is required to accept the permit application. This will be deducted from the final calculation of the permit fee.
- Outside agency permits—The applicant must submit and secure all necessary permits from other agencies, including but not limited to the IEPA, FEMA, DuPage County, the local Highway Authority, Wheaton Sanitary District, etc. Sites over one acre must include a copy of the NOI (Notice of Intent) submitted to the State of Illinois.
Special Management Areas:
Any site affecting a special management area, such as but not limited to wetlands, floodplains or riparian environments shall be required to obtain certification of the special management areas from the DuPage County Department of Development prior to being issued a stormwater management permit. It is recommended, that the applicant schedule a pre-application meeting with the City and DuPage County prior to submitting for a permit.
Sec. 22-6. Safety fencing.
- 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.
- 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.
- 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.
CHECKLIST: TYPE III STORMWATER MANAGEMENT PERMIT
SUBDIVISIONS, BUSINESS, INDUSTRIAL, OFFICE, INSTITUTIONAL, COMMERCIAL DEVELOPMENTS - STORMWATER MANAGEMENT PLAN REQUIREMENTS
Applicants for a stormwater management permit must submit the items as outlined on the Type III Grading Plan requirements. All applicants should assemble the required items and submit them along with this checklist to the City of Wheaton Permit Processor.