Reso 2000-162 - Laserfiche WebLink

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• EM3EO INCORPORATED • X. Maintenance and Monitoring Schedule The site inspections should be undertaken a minimum of three times per year. The GHAD budget should provide for four or more inspections in years of heavy rainfall. The inspections should take place in October, prior to the first significant rainfall; mid- winter as necessary during heavy rainfall years; and in early April at the end of the rainy season. The frequency of the inspections should increase depending upon the intensity and recurrence of rainfall. Site inspections should increase sufficiently to provide for mitigation of potential hazards. The GHAD Manager shall keep all available geotechnical reports on file in the records of the GHAD. • The engineer and/or geologist retained by the District should carry, out an inspection of lined surface ditches at least twice a year. One inspection should be in the fall prior to the onset of winter rains. The inspection shall check for sedimentation and cracking or shifting of the concrete -lined ditches. Repairs and maintenance as needed should be undertaken including removal of excess silt or sediment in ditches and patching or replacement of cracked or broken ditches, prior to the beginning of the next rainy season. • Subsurface drain outlets and horizontal drilled drain outlets, if any, should be checked. Water flowing from these outlets should be measured and recorded during each inspection. The inspections should take place at least twice annually, preferably in the fall and spring. Any suspicious interruption in flow should signal a need to unplug or clean by flushing the affected drain. • Piezometers to measure ground -water levels, or instruments such as inclinometers or tiltmeters measuring potential slope instability should be monitored quarterly, if installed. • Inlets, outfalls or trash racks, if used, must be kept free of debris and spillways maintained. It is anticipated that initially at least once every two (2) years, cleanup of vegetation and removal of silt would be in order. Attention should be given to plantings or other obstructions which may interfere with access by power equipment. • The drainage corridors should be inspected at least twice a year. One inspection should be in the fall prior to the onset of winter rains. A second inspection should be undertaken during the rainy season to monitor potential failures which could imminently threaten or damage site 4867.1.002.01 October 10, 2000 15