EP 1165-2-1
30 Jul 99
12-17. Charts, Publications and Notices. The Corps publishes
navigation charts for the inland waterways, and various publications
containing navigational information and Federal regulations. Public
Law 85-480 authorizes publication and sale generally, and requires
that charges to the public for copies cover the cost of printing. (ER
1130-2-520)
12-18. Channel Condition Surveys. Every active waterway and harbor
project will be surveyed a minimum of once per year to determine the
condition of the channel used by navigation traffic. More frequent
surveys may be made if justified by rapid shoaling rates. District
and division commanders will then take necessary action to perform
maintenance dredging to the appropriate project depth based on a valid
economic analysis. (ER 1130-2-520)
12-19.
Project Dimensions.
a. Authorized Dimensions. The dimensions of proposed
features of improvement are set forth in preauthorization planning
reports and, when project authorization is referenced to such reports,
those dimensions constitute limitations with respect to the authorized
works. This includes depths, widths and lengths of channels, harbor
maneuvering areas and anchorages, lock sizes, horizontal and vertical
bridge clearances and lengths of breakwaters. Unless otherwise
provided in the project authorization, channel depths specified will
be construed as actual dredging limits (exclusive of overdepth
dredging) and not as the draft limit of vessels to be accommodated.
In planning for initial development of authorized channels, channel
widths specified shall (in accordance with Section 5 of the 1915 River
and Harbor Act) be understood to admit of such increases at the
entrances, bends, sidings and turning places as necessary to allow for
the free movement of vessels. (ER 1130-2-520)
b. Dimensions Maintained. Full authorized project dimensions
are maintained for Federal navigation projects where feasible and
justified. To avoid frequent redredging in order to maintain full
project depths, advance maintenance dredging is performed in critical,
fast shoaling areas to the extent that it would result in the least
overall cost. Such additional depth dredging is exclusive of and
beyond the allowable overdepth included to compensate for dredging
inaccuracies. In some waterways and harbors, the current needs of
navigation can be met by dredging the project channel or basin to less
than the authorized depth and/or width. If a temporary reduction in
width from that authorized is acceptable, removal of moderate shoaling
along channel lines is deferred until essential dredging in the
channel is undertaken. Only where known progressive shoaling along
channel lines is unduly restrictive to navigation will its removal be
undertaken prior to the normal scheduling of maintenance dredging.
(ER 1130-2-520)
12-20. Dredged Material Disposal. In planning new navigation
projects prior to WRDA 1996 (on or before 12 October 1996), the policy
was to require non-Federal interests to provide without cost to the
United States all suitable areas required for initial and subsequent
disposal of dredged material and all necessary retaining dikes,
bulkheads and embankments therefor, or the costs of such retaining
works. Subsequent to WRDA 1996 (after 12 October 1996), land-based
and aquatic dredged material disposal facilities (DMDF) associated
with the construction and O&M of all Federal navigation harbors and
12-16
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