page_left_to_page_right_endpoint_drop
91.79 - 76.75 = 15.04 ft15.04 ft
91.79 - 76.75 = 15.04 feet. This is an endpoint difference, not a uniform slope.
Drawing notation: EL. 91.79; EL. 76.75
Direction is page-left to page-right only pending plan registration.
Calculated from: site-main-grade-page-left-elevation, site-main-grade-page-right-elevation