GRANTS PASS CHAMBER OF COMMERCE – VISITORS CENTER - MET MANUAL TRAIL EVALUATION 
April 20, 2015, UTM at site of Carsonite Marker – UTM 10T 0473445 E
							4701092 N  Jim Ford
Site of GLO point at Vine Street and Morgan Lane UTM T10 0473508 E
							4700951 N  Bob Black

This analysis was based on the Research Principles, Methods and Guidelines noted in the OCTA MET MANUAL.

General Principles Are:
Probability:
‘…the exact location of an emigrant trail segment cannot be verified with absolute certainty.  …however, the trail researcher can strive for a higher degree of probability by utilizing…accepted procedures.’

Analogy:
‘The location of a possible trail segment can be authenticated only by comparing and contrasting it with what is already known about other verified emigrant trail.’  ‘documentary and physical evidence’.

The Cardinal Rules:
For ‘an emigrant trail segment to be considered as verified, it must conform to the following ‘Four Cardinal Rules’.  Where conditions exist that any of these four rules do not apply, the probability level is reduced accordingly.’

1.  Coherence Rule:
‘There must be a linear uniformity so that trail segments form a continuous sequence; i.e., the trail segment under investigation has to link together (cohere) with the trail segments that precede and follow it.’

Linear uniformity:  
Alignment to the north is at the GLO location on Granite Hill.  The alignment to the south is the GLO surveyed marker at the intersection of Vine Street and Morgan Lane.
(See Map.)

2.  Corroborative Rule:
‘There must be confirming documentary evidence of the trail; i.e., the trail segment under investigation has to have valid written or cartographic evidence to support (corroborate) its authenticity.’

Written Evidence:  In the 1854 GLO survey the location of the Applegate Trail is identified on a section line which  is Morgan Lane and where Vine Street crosses Morgan Lane is the surveyed location.

Cartographic Evidence:  The surveyed location is on the GLO 1855 map.  (See Map.)

3.  Collateral Rule:
‘There must be accompanying physical and/or topographical evidence of a trail; i.e., the trail segment under investigation has to have some geomorphic or artifact evidence (collateral) to confirm it as an  authentic emigrant trail.’

Topographical Evidence:  The 185 GLO map locates the Applegate Trail on a section line.

4.  Correlation Rule:
‘There must be overall agreement  among all types of evidence; i.e., the evidence resulting from the first three cardinal rules has to mutually support (correlate), and not contradict one another, in order to verify the location of a trail segment.’

Overall agreement:  Yes

Classification Category

Class 4:  Altered Trail
	Description:  ‘The trail location is verified but elements of its original condition have been permanently altered, primarily by road construction, such as widening, blading, grading, crowning, graveling, or paving.  In some cases, the original trail has been permanently altered by underground cables and pipelines.  In other cases, trail segment, whose location are verified, may have been destroyed by natural events or modern developments, leaving no evidence of its original appearance.’

YES