Here is the official map of the Committee's deliberation.
Since parts are hard to read, I will list important map text going clockwise from the upper right corner:
"Navajo Bridge": The Park boundary is at the mouth of the Paria River, though the text refers to the bridge a few miles downstream.
[One way to think about some of these notations is that they were more relevant in an earlier part of the legislative history.]
"MARBLE CANYON EAST Proposed Boundary on Canyon Rim Note: Subject to Concurrence of the Navajo Nation" : Goldwater & NPS wanted a rim boundary, but the Navajo would not agree (and still do not), so this notation wistfully suggests it is "proposed", a dream. One might ask then, if the rim is "proposed", where is the "real" eastern boundary?
"COCONINO PLATEAU": Just above the text are the 3 partial sections moved from the Forest to the Park.
The two existing parts of the Havasupai Reservation were labelled. Cross-hatching shows the Use Area; diagonals the Reservation addition.
"BOUNDARY: approx ¼ mile back from canyon rim." This refers to the Havasupai Reservation addition's northern boundary; additional information on crossing Havasu Creek was in the body of the bill.
"164.8 RIVER MILE" AND "273.1 RIVER MILE" identify the points on the Park boundary described as "Boundary on South Bank of Colorado River (River Mile 164.8 to 273.1)"
"Boundary on Canyon Rim" appears twice on the north side to show that the Park was only to include canyon, not any rim land in the Kanab, Whitmore, Parashant-Andrus additiions.
"MARBLE CANYON WEST Boundary on Canyon Rim": No proposed or concurrences here; the land was all federal to begin with, and the boundary was emphatically on the rim.