600 RIVERSIDE RD 2022-01-25 - Laserfiche WebLink

Page 3 % DRAWINGS L2.8 AND L2.9 • Dimensions added to trees to maintain a 15-foot separation from the trail edge. DRAINAGE REPORT Although no comments were issued to the drainage report, we offer the following in response to the above revisions made to the grading and drainage civil drawings: • Grading of the area to accommodate the various trail segments was intended to maintain the existing topography and drainage patterns. The low points were maintained whenever possible and only elevated in conformance to installing smooth vertical curves to accommodate pedestrian, bicycle, and occasional maintenance vehicles. • A concrete section roughened surface was introduced at all low points where stormwater will drain across the path as requested in the City comments. This concrete surface does not change the hydrology or drainage pattern and only adds to the longevity of the trail and adds traction for pedestrians and cyclists. • The surface of the trail is maintained above flooding level whenever possible by introducing trail -side ditches, such as in Segment Trail F, to channelize rain water and direct it to the flow dispersal trench under Trail K, just north of its connection to Trail F. This storm drainage system does not change the flow pattern; it only enhances it and minimizes flow over the trail by providing hydraulic conductivity beneath the trail.