subparagraphs below should be inserted into Section
01270.
No paragraph covering partial payment has been
included in this guide specification. If partial
payment is to be made, it should be addressed in the
contract at the appropriate place (e.g., Section
01270 MEASUREMENT AND PAYMENT. One method, which
has been used, is described here in general terms
and may be incorporated when necessary. To estimate
the value of work completed during each period the
zones are divided into the class of clearing
involved. Class A clearing includes, as nearly as
can be determined from aerial photographs or other
means, all the wooded area with the exception of
scattered trees, fringe growth along roads and
fences, etc. Class B clearing contains all of the
open, cultivated or pasture lands and those
relatively open areas containing scattered trees,
fringe growth along roads and fences, etc. The
numbers of hectares (acreages) in each class should
be estimated in advance and tabulated under the
partial payment clause of the specification and
thenceforth not be subject to change even if it is
discovered that the original classification may have
been in error. The most difficult class is
arbitrarily assigned ninety work units for clearing,
disposal, and clean-up. The number of work units in
the other classes are estimated by comparison with
the base class. The final estimate might be as
follows:
Class
A,
Zone
1
____
hectares
(acres)
x
60
=
____
work
units
Class
B,
Zone
1
____
hectares
(acres)
x
15
=
____
work
units
Class
A,
Zone
2
____
hectares
(acres)
x
90
=
____
work
units
Class
B,
Zone
2
____
hectares
(acres)
x
25
=
____
work
units
Total work units = ____
The value of a work unit is determined by dividing
the contract price by the above total. The value of
the work completed during any period will be
determined by multiplying the number of hectares
(acres) of the various classes completed in each
zone, as estimated by the Contracting Officer by
planimetering areas from Government progress maps,
by the work units in that class, totaling these
figures and multiplying this total by the value of
an individual unit as determined above. The
estimate of the Contracting Officer will be final.
For the purpose of apportioning the classes of work
completed during any period, the felling and decking
ready for burning or removal is considered as 50
percent of the work required and the removal and/or
burning and clean-up will be considered as the
remaining 50 percent.
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SECTION 02233
Page 4
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