Revision History for Open-File Report 2013-1236

By Pamela J. Lombard

Establishment of a Vertical Control Network Along the St. Croix River in New Brunswick and Maine

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Posted online November 14, 2013

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Revised and reposted June 5, 2019, version 1.1

Revisions were made to reflect updated elevations for vertical control points at Grand Lake Stream, Maine, determined from a global navigation satellite system (GNSS) survey on February 28, 2019, and the removal of USGS control point WGL_BM3 from the vertical control network.

In the report section "Grand Lake Stream, Maine," the text of the second paragraph was modified. References to WGL_BM3 were removed. The elevation of WGL_BM2 and the description of how the elevation was determined were updated.

Tables 4 and 11 were modified. Elevations for control points WGL_BM1, WGL_RM1, WGL_BM2, and WGL_Dam were updated. Table rows for control point WGL_BM3 were removed.

The figure 5 photograph was replaced with a photograph from the February 28, 2019, survey.