C4g_ Attachment G Photos.pdf

This document is a technical reference guide containing illustrated figures of typical trail features and construction standards used in federal trail design and maintenance.

The document provides nine detailed illustrations depicting standard trail construction techniques: Rolling Contour Trail (showing features such as sidehill location, alignment perpendicular to fall line, gentle grade, outsloped tread, and grade reversal); The Half Rule (demonstrating grade reduction principles for trail sustainability); Full Bench Trail (illustrating critical points, backslope, sideslope, and trail tread with 5% outslope); Stone Pitching (showing above-ground and below-ground stone placement with anchor stones); Rolling Grade Dip (depicting ramp and knick construction with specified outslope percentages); Rock Retaining Wall (detailing foundation preparation, mineral soil use, and wall insloping); Shallow Stream Ford and Gully Crossing Rock Structure (presenting plan view, profile, and cross-section specifications for water crossings); Rolling Crown Switchback (showing crowned landing slopes, retaining walls, grade reversals, and drainage requirements); and Insloped Turn (illustrating backslope blending, retaining walls, and large drain specifications). Additional technical drawings address drain dip construction dimensions, clearing limits and brushing standards, existing trail restoration methodologies, and typical trail cross-slope and bench specifications. The reference materials establish standardized construction parameters and dimensional requirements for U.S. Department of Agriculture Forest Service trail projects, with notations regarding outslope percentages, critical point rounding, drainage specifications, and material requirements throughout.