Agenda - 04-19-2005-9c - Laserfiche WebLink

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i~ Area designated for multi-use field 225' x 360' Adult soccer field 195' x 300' Field Hockey 150' x 300' Lacrosse 150' x 360' The best orientation of a multi-use field should be North-South to take into consideration sun patterns, but existing topography also may influence orientation. After all parties involved in the planning of the field have accepted a concept plan, the designer then will detail the project with a series of plans to instruct the contractor on how to build the field, Project elements should be arranged on the site and a layout plan created. The layout plan will communicate to the contractor where the appropriate elements should be staked and provide accurate dimensions. A grading plan and a planting plan are also communicated to the contractor to establish final grades and install the required landscape material, Erosion control measures are also included in the grading plan, A key element in the design of a multi~~use field is drainage, Athletic fields should always be designed as a single, individual drainage unit, where there should be no wafer from adjacent areas flowing on to the field, A field with contours supporting positive drainage and correct soil amenities will provide proper infiltration and percolation. Existing topography of the site is important to understand because the earth-moving phase of construction will most likely be the biggest cost of the project. The existing topography reflects natural drainage patterns, which should remain consistent after regrading has occurred. Drastically disturbing the drainage patterns could disturb soil layers and interrupt natural infiltration. Multi-use athletic fields should ideally be designed to drain with a crowned surface with level touchlines. The slope from the center ridge to the sidelines should be between 1 % -1,75%, depending on the soils of the site and the turf used. Side to side sloped fields can work if existing contours better reflect this layout, However, sloping a field from end to end should be avoided because the low end of the field almost always stays wet and puts stress on the soil and turf.