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BOOK 97 wzE 308 *PZC recommendation: by a 4-2 vote the Planning ,and Zoning Com„iosio"'recommended that the Board adopt an amendment to allow in residential areas commercial vehicles with net weights of less than 51000 pounds. Please refer to pages "10" - 012" of attachment #6 regarding the Planning and Zoning Commission meeting discussion on this issue. Section 20. Allowing certain dock structures to project farther into waterways. Current LDRs limit the distance water-rdlated structures (e.g. boat slips, docks, mooring poles) are allowed to project out -from a shoreline into a waterway (e.g. river or canal). Currently, boat slips and boat slip walkways can project out from a shoreline no more than 208 of the width of the waterway. Mooring poles, however, are allowed to project out 258 of the waterway width. Recently, environmental planning staff reviewed a dock proposal that did not fit within the current requirements but had merit and seemed to fit within the intent of the existing regulations. Staff and the PSAC agree that all dock structures should be allowed to project into waterways as far as mooring poles are currently allowed to project (258). Such flexibility allows good dock designs that will not adversely affect waterway navigation. Therefore, staff has proposed the section 20 amendments to implement such changes. _ Section 21. Mining regulations for mining operation and site restoration timeframes. During discussions at a September 1995 Board of County Commissioners workshop, the Board asked staff to look into mining timeframe issues. Current Chapter 934 LDRs require timeframes to be established for all long-term commercial mining operations. However, in practice, the county has essentially acknowledged timeframes proposed by applicants and has extended the timeframes of operations via annual mining permits. The existing LDRs contain no specific guidelines for timeframes. In its survey of other counties (see attachment #11), staff found that a majority have no definitive time limits on long-term commercial mining operations (Brevard, Collier, Palm Beach, Volusia). The other surveyed counties have various time limits, all of which can be extended by county approval (Martin, Sarasota, St. Lucie). Martin County imposes a 3 year time limit which can be extended. St. Lucie County imposes a 6 year time limit for mines under 20 acres in size and a 20 year limit for larger mines= both limits can be extended. Sarasota County imposes time limits that correspond to the quantity of material to be removed, as follows: Less than 10,000 cubic yards.................................1 year 10,000 - 99,999 cubic yards.................................2 years 100,000 - 500,000 cubic yards...............................5 years over 500,000 cubic yards...................................10 years Note: commercial mining operations in Indian River County usually exceed 500,000 cubic yards of material removed over the life of the mine. For example, an 11 acre excavation pit with an average depth (below ground level) of 10' would yield approximately 532,400 cubic yards. Sarasota County's approach or setting 'specific timeframes based on the amount of material to be removed is reasonable in staff's opinion. In addition to these timeframes, a 6 month reclamation and restoration deadline should be established to provide a workable, known end -date for restoring a mining site. For example, a 600,000 cubic yard mine would need to be closed -down at the end of 10 years, and at the end of 10 years and 6 months, the site would need to be reclaimed and restored. Such restoration generally includes: final grading, grassing slopes, and establishing littoral zones. Finally, the county should allow for extensions that correspond to the period(s) of time a mine was inactive due to market conditions, such as during an economic .recession when fill material for new development is not marketable. The section 22 proposed amendments implement these timeframe and." extension items. Section 22. Extending timeframes for certain incidental to., - construction mining operations. The Board of County Commissioners discussed this issue at its September 21, 1995 mining regulations workshop and again at its NovembeY 14, 1995 follow-up discussion on various mining issues. At the November 14th meeting, the Board reviewed potential LDR changes similar to these proposals and directed staff to initiate such changes through the normal LDR amendment process. LDR Section 934.04(7)(b) allows excavation and hauling of material incidental to an approved construction project where more than 5,000 cubic yards of material is exported off-site. Such activity can occur throughout the county in all zoning districts, including 10 FEBRUARY 13, 1996 0