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• • (e) The city may allow the disturbance of an existing buffer area during the course of construction activity. This disturbance must be kept to a minimum, soils must be decompacted to a level that will accommodate root growth, and the buffer area must be re-established as required by the city. The city will determine the amount of allowable disturbance.The city may require a cash escrow or letter of credit equal to 150 percent of the cost to re-establish the buffer to its original condition. (f) The city may require buffer area planting and maintenance when the city determines that there is inadequate vegetation in the buffer area to meet the intent of this section.The city may require a cash escrow or letter of credit equal to 150 percent of the estimated cost of the vegetation and installation. The escrow or letter of credit must be valid for up to two years and may be used by the city to replace any vegetation that dies. (g) The affected property owner or homeowner association that is responsible for the maintenance must: (1) Maintain and repair damage to buffer areas from such activities as mowing, cutting, grading or other prohibited activities, unless mowing is approved by the city as a buffer management plan. Permission must be obtained from the city before implementing buffer management plans, which may include mowing, burning, and the use of herbicides. (2) Maintain only the permitted vegetation in the buffer area and must remove all noxious weeds and invasive, non-native species such as European buckthorn, upon obtaining a vegetation removal permit from the city in conjunction with an approved buffer management plan. (3) Ensure that all soil surfaces in the buffer area are planted with the permitted vegetation and that there is no open soil surface that may result in erosion. (4) Ensure that livestock or other domesticated animals which have the potential to permanently disturb the buffer area by compaction or vegetation removal be kept from entering the buffer area and wetland by a fence or other suitable means. (h) The final upslope edge of the buffer shall be provided to the city in a hard copy and in a CAD or GIS format in Hennepin County coordinates. (i) Golf course partial exemption. Public and private golf courses existing and in operation on the date of adoption of this article shall be allowed a partial exemption from buffer creation and maintenance requirements with regards to mowing or cutting buffer vegetation in areas subject to golf play, subject to the following: (1) At such time that this article requires establishment of a buffer, applicant shall submit a certificate of survey identifying the location, size and type of the wetland for which buffer exemption is requested. (2) Applicant shall submit a buffer management plan for city council approval, identifying those areas where exemption is requested and providing for alternative methods of wetland protection equivalent to an unmowed buffer. (Ord. No. 28 3rd series, § 1, 8-22-2005) DIVISION 4. USES Sec. 78-1606. Permitted uses. (a) Within the wetland overlay districts no land may be used except for one or more of the following uses: (1) Native wetland vegetation, provided that no change is made to the ground elevation; (2) Wildlife and nature preserves; (3) Overhead utility lines and poles that are less than two feet in diameter;