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<br />. <br /> <br />. <br /> <br />. <br /> <br />Ditch Maintenance Guidance <br /> <br />7 <br /> <br />APPENDIX B <br /> <br />BEST MANAGEMENT PRACTICES <br /> <br />The following best management practices (BMPs) are required for ditch maintenance activities, <br />as described in this Guidance, to qualify as either "no effect" activities, or "may affect, not likely <br />to adversely affect" activities: <br /> <br />. Distance Measurements: All measurements of impacts, are based upon a 110 foot linear <br />distance along a ditch, with no overlapping 110 foot segments (refer to example A, Figure 1), <br /> <br />. Disposition of Debris: This refers to the debris produced from silt and debris removal <br />activities (ie. ditch cleaning), disposition of mulch after mowing/cutting, and other material <br />produced from ditch maintenance activities, Placement of such debris should, to the <br />maximum extent practicable, avoid shrub habitat, and at no time should disturb more than <br />the maximum habitat patch size (of either foraging or shrub habitat), as defined above. <br /> <br />. Out-of-Season: The Service recommends that, to the maximum extent possible, all ditch <br />maintenance activities be carried out during the Preble's meadow jumping mouse <br />hibernation season (November through April). <br /> <br />. <br /> <br />Timinll": The Service recommends that all maintenance activities that must be carried out <br />during the Preble's meadow jumping mouse breeding season (May through October) be <br />conducted during daylight hours only. <br /> <br />. Access: Access to a ditch for maintenance activities should be from only one side and from <br />a location that minimizes, to the maximum extent.practicable, impacts to shrub habitat. <br />Access can occur from both sides of a ditch, if there is currently existing access on both <br />sides of a ditch and access would require no additional impacts to shrub habitat. <br />