STEEP SLOPE STONE LINES (STEEPS):
STEEPS:
STEEPS ARE STONE LINES ON GRADES IN EXCESS OF 50%.
According to "Perceiving 'Walk-on-able' Slopes by J.M. Kinsella-Shaw, et al" the participants would "...walk up the ramp comfortably, at an ordinary pace, while maintaining upright posture and making full "flat-footed" contact..."
Depending on the participant the maximum slopes traversed were 22% to 32% which was only achieved by fit athletes.
Using only manual labor to lift, stack and manipulate stones weighing hundreds to thousands of pounds on a level surface would be difficult at best.
On a 30% plus slope it is impossible, on an 80% grade it takes a high technology.
The Shasta Steep Slope Map shows the locations of over 85 Shasta stone lines with line segments on extreme slopes of 50% to 80%.
The areas adjacent to the these stone lines are undisturbed and unbelievably there are NO SIGNS OF CONSTRUCTION.