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<br />EXHIBI'f 2
<br />
<br />STANDARD SURVEY CONTROL MARKER
<br />(Permanent Type)
<br />For Bench Marks with plane coordinates
<br />
<br />'IJ!RASS CAP placed with
<br />, /" 12" twisted wire anchor
<br />
<br />_-' 4_5" dia. CAN with:
<br />~. ends removed to
<br />;, "y-< form and finish top
<br />! ;
<br />side slit and wired
<br />for removal
<br />
<br />"
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<br />'iil
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<br />
<br />i4-6" dia. HOLE
<br />'I with loose side
<br />material removed
<br />
<br />'.' . ~..::~-~
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<br />
<br />Com'l SACKED CONCRETE
<br />mixed and placed on site
<br />
<br />BRASS CAP
<br />
<br />Scale 1"- 2 in.
<br />
<br />.t;'
<br />
<br />!.. ,
<br />. ....,.
<br />-.",-.,1"
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<br />". ~,7.,... '. "
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<br />
<br />~'Loose bottom
<br />'I material tamped
<br />
<br />SECTION
<br />DETAILS
<br />
<br />,"
<br />
<br />Scale 1"_ 1 ft.
<br />
<br />
<br />;
<br />
<br />~IWords, numbers, etc.
<br />; Stamped with 3/32"
<br />I steel punch dies
<br />
<br />CRITERIA for locating required control markers are based on:
<br />1. Traverse locations parallel with the project area corridor.
<br />2. Interval and spacing of control points in compliance with
<br />project ground control survey requirements and additional
<br />bench marks indicated at the ground elevations prescribed.
<br />3. Visibility between points ,(or with azimuth lIk1.rk references)
<br />4. Locations: within public right-of-ways or easements undis-
<br />turbed by normal area uses; near easily identified objects,
<br />in accessible areas; clearly identified on the ground and
<br />shown on a photograph.
<br />
<br />CRITERIA for reference ties to control markers are based on:
<br />1. For local proximity, at least three accurate measurements
<br />from semi-permanent marks on fixed structural objects, such
<br />as footings, corners and walls of structures; surfaces of
<br />concrete objects, such as curbs, walks, pavement, etc.; and
<br />from spikes in large trees and poles, etc.
<br />2. For general vicinity, at least two surface measurements to
<br />visually observed structural objects of a permanent nature,
<br />such as drives, roads, streets, highways, railroads, etc.
<br />One of the surface measurements, for the bench mark control
<br />markers required, will be made to the flow line of the
<br />stream course.
<br />
<br />EXHIBIT 2
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