Standard Specifications for Improvements
Section VI. Standards for Individual Lot Improvement and Inspection
These standards detail requirement (2) of subsection (a) of Section 43-12. “Prerequisites to building permits.”
In cases where a lot has no approved master grading plan, a proposed grading plan with the following information must be provided:
- Show proposed elevations for the subject lot at all lot corners and proposed break points. Also show drainage arrows indicating the direction of flows to some positive outlet, i.e., a storm inlet drainage swale, or the street. Elevations at the point of outlet are required. Additional elevations may be required to verify that drainage directed offsite has a positive outlet as defined above.
- Show proposed Top of Foundation elevations for the subject lot with said elevation being a minimum of two feet (2') above the existing top of curb, or crown of road if no curbing exists. For structures adjoining a defined or undefined drainage way, the lowest opening shall be one foot (1') above the 100 year flood elevation and shall be two feet (2') above the 100-year flood elevation when the tributary area is greater than 20 acres. For lots adjacent to lakes, ponds, etc., basement floors will be two feet (2') above Normal Water Level. In any event, conformance with City of Aurora Stormwater Ordinance is required if applicable.
- Locate and display all existing or proposed utility structures, sidewalks, decks, driveways, handicap ramps, etc.
- Lot line drainage slopes are to be a minimum of 2.0%, unless otherwise approved by the City Engineer.
- Show existing Top of Foundation, (T/F) elevations on all adjacent foundations.
- All elevations are to be related to NAVD 1988 datum.
- Include the builder’s name, address, and phone number on the plan. The plan shall be no larger than 11" x 17".
- The plan must be prepared and sealed by an Illinois Professional Land Surveyor, or a registered Illinois Professional Engineer.
- The following note may be required in some cases. “All hard surface drainage from sump pumps, driveways, downspouts, etc. shall be directed and drained to the streets.”
The following standards detail the requirements of item (2) of subsection (a) of Section 43-13 “Prerequisites to occupancy permits.”
- The builder’s name; Subdivision Unit number and name, lot number, and the lot’s common street address;
- The elevation of the Top of Foundation, hereafter known as the “foundation elevation”, at the time of survey and proposed foundation elevation as shown on the approved proposed grading plan. This elevation shall be acceptable when falling within a standard of up to six inches (6") high or one inch (1") low compared to the approved proposed foundation elevation for that lot; and further, any structure with foundation elevations not in accord with these standards shall require a revised individual lot grading plan to be prepared subject to the approval of the City Engineer, who shall approve of same only if the changes made will not adversely affect storm water management;
- The location of the principal structures on each building site;
- The proposed and existing lot elevations and drainage flow arrows;
- The existing finished grade elevations at the corners of each structure;
- The proposed and existing elevations of all drainage break points within the building site;
- The existing slope, measured by percentage, of all drainage swales;
- The location and elevations of the public sidewalk;
- The existing location and elevation of every utility structure on the building site and in the public right-of-way adjacent thereto, including but not limited to, buffalo boxes, valve boxes, fire hydrants, catch basins, manholes, and inlets;
- The seal and signature of an Illinois Registered Professional Land Surveyor, or Engineer, affixed thereto and containing the following certification statement:
“The final grading of this lot has been completed in substantial conformance with the approved proposed grading plan and in accordance with the standards established by the City of Aurora Standard Specifications for Improvement; the top of foundation elevation is within the acceptable standard and every exposed utility structure has been adjusted to finished grade.”
These standards detail requirement (4) of subsection (a) of Section 43-13. “Prerequisites to occupancy permits.”
1. Sanitary Manhole, Storm Manhole, Inlet, Catch Basin, Valve Vaults, and Clean Out
Checked for cleanliness (no construction debris or erosion material); rings not broken, cracked, or shifted, (all rings and frame must be concentric); butyl rope between rings; not covered with dirt or sod. Covers must have appropriate marking stamped on the lid. Hairline cracks on rings may be acceptable as long as seepage or rapid deterioration are not likely to occur. Inspector will lift cover to inspect rings. Structure must be adjusted to finished grade.
- Sanitary Manhole covers must have a gasket and be of the concealed pickhole style.
- Storm Manhole covers should be of the concealed pickhole style.
- Storm Inlets with fabric left in the inlets to assist in erosion control may be left in place until the last lot bordering the inlet is developed. This determination will be at the Inspector’s discretion.
- Clean Outs will be checked to insure that the sump discharge is connected.
2. Water Valve
Checked to ensure that the sleeve is intact, straight, and has an appropriate cover with the words “CITY OF AURORA” cast in place. Valve is visible and straight. Inspector will key the valve and ensure that the sleeve is adjusted to finished grade. Inspector will use a straightedge from the sidewalk to the top of curb to determine the finished grade line.
3. Fire Hydrant
The City of Aurora standard specifications for improvements states that the centerline of the pumper nozzle “shall be 22 to 24 inches above the finished grade line ”. This means that the breakaway flange should be 1 to 3 inches above the finished grade. The hydrant should be vertical with the two smaller pumper nozzles parallel to the back of curb. The auxiliary valve for each hydrant will be inspected in the same manner as in item 2.
4. Service B-Box
Will be visually inspected for damage, and to insure that the appropriate cap is unbroken, connected to the sleeve, and that the access plug in the cap unscrews independently of the cap. The inspector has only a straight and off-set key and will key the B-Box to determine serviceability. The top of the B-Box must be at finished grade. The builder must adjust the B-Box to finished grade if the inspection occurs prior to the placement of sod. The box must be straight and allow the key to move freely in the sleeve.
Checked for cracks and gouges that constitute a defect, impedes proper drainage, or accelerates surface deterioration. Curb cuts not used must be replaced with the appropriate curb and gutter. Curbs must be clean for the inspection. Patching is not acceptable.
6. Walks and Drives
Same as item 5 above. All chipped and cracked sidewalks and drive approaches will be replaced; patches are not acceptable. Sidewalks are considered “chipped” and require replacement if the chips or gouges are greater than one and one half inches (1.5") in diameter or one half inch (1/2") deep. All handicap ramps must be finished with the proper pattern. The repair of structures located in sidewalks or driveway/drive approaches requires replacement of the entire section affected. Cutting or patching around the structure is not acceptable. Likewise any damage done to previously approved sidewalks or driveways in the replacement of chipped portions will be the builder’s responsibility to correct.
A visual inspection will be made to determine the condition of the grade and if any gross problems with the drainage seem likely. The builder is responsible to ensure that no structure subject to inspection is covered either by soil or sod.
These standards detail item (i.) of paragraph (a.), and item (ii.) of paragraph (a.) of requirement (6.) of subsection (a) of Section 43-13. “Prerequisites to occupancy permits.”
Bonding amounts for incomplete work.
- Final grading and as-built plan preparation $ 2,000.00
- Lot inspection item $ 1,500.00
- Both (a.) & (b.) $ 3,500.00
- For any commercial site $ 5,000.00
- For any Multi-Family building $ 1,500.00/Unit*
*All units in a building must be bonded at the time first temp is requested.