Attachment 4 - 837-1 Typical Rolling Dip.pdf

This is a technical drawing specification for a typical rolling dip design, documented as Drawing 837-1. The drawing illustrates a standard roadway dip configuration used to manage water drainage and grade transitions along roads.

The plan view shows a roadway width of 7.2 meters (24 feet) with a rolling dip spanning 10.7 meters (35 feet) in length, divided into sections A through F. The dip features a 4.5-meter (15-foot) center depression with roadway berms where required and an intersection with design grade lines. Water management provisions include a water course, break with design grade, and reinstatement of an existing special outlet structure. The cross-sectional profiles (A-B-C and D-E-F) detail vertical curves with nominal 3.0-meter (10-foot) radii and grade lines. The specification table provides precise measurements for road grades under 3, 7, and 9, with varying width and depth dimensions across multiple width categories ranging from 3.6 meters to 7.2 meters. A critical note indicates that insloped dips must discharge into culverts, drop inlets, overside drains, or natural ground, and the minimum cross grade from point B to E must be 4 percent greater than the original road grade. All measurements are provided in meters unless otherwise stated.