(A) Compliance required. All earth moving grading and grading operations not specifically exempted by this chapter shall comply with the applicable standards and requirements set forth in this section, in addition to the other requirements of this chapter.
(B) Handbook adopted by reference. The standards and specifications of the Erosion and Sediment Control Handbook, Will-So. Cook County, Illinois, First Edition, as compiled by the Will-So. Cook County Soil and Water Conservation District and approved by the Seven County Regional Planning Commission, are incorporated into this section and made a part of this section by this reference for the purpose of delineating procedures and methods of operation under development plans approved in § 152.06 above. In the event of a conflict between any of the provisions of the handbook and any of the provisions of this chapter, the provisions of this chapter shall control.
(C) Special precautions.
(1) If, at any stage of the grading, the City Engineer or the Director of Public Works determines, by inspection, that the nature of the formation is such that further work as authorized by an existing permit is likely to imperil any property, public way, watercourse or drainage structure, he or she may require, as a condition to allowing the work to be done, that such reasonable safety precautions be taken as he or she considers advisable to avoid the likelihood of the peril. Special precautions may include, but are not limited to, specifying a more level exposed slope, construction of additional drainage facilities, berms, terracing, compaction, leveling or cribbing, installation of plant materials for erosion control and reports of a registered engineering geologist whose recommendations may be made requirements for further work.
(2) Where it appears that storm damage may result because the grading is not complete, work may be stopped and the permittee required to install temporary planting to control erosion, to install temporary structures or to take such other measures as may be required to protect adjoining property or the public safety. On large operations, or where unusual site conditions prevail, the City Engineer or the Director may specify the time of starting grading and the time of completion or may require that the operation be conducted in specific stages so as to ensure completion of protective measures or devices prior to the advent of seasonal rains.
(D) Expiration of permit. Every site development permit shall expire by limitation and shall become null and void if the work authorized by the permit has not been commenced within 180 days or is not completed within one year from the date of issuance. However, the Mayor and Council may, if the permit holder presents satisfactory evidence that unusual difficulties have prevented work being started or completed within the specified time limits, grant a reasonable extension of time if written application is made before the expiration date of the permit.
(2000 Code, § 15.44.120)