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K E Y L O C K R E P O R T
This report is produced monthly and distributed by the U. S. Army Corps of
Engineers Navigation Data Center. It provides a monthly summary and year to date
totals of commodity tonnages and barge traffic. It contains data for eleven(11)
designated key lock sites or fifteen(15) chambers on the following rivers and
waterway:
Arkansas River: Norrell Lock
Columbia River: Bonneville Lock
Gulf Intracoastal Waterway: Calcasieu Lock and Inner Harbor Navigation
Canal Lock
Illinois River: LaGrange Lock
Kanawha River: Winfield Main 1, 2, and the new 800’ chamber – Winfield
Main 800
Mississippi River: Lock 25, Lock 27 and Lock 27 Aux1
Ohio River: Lock 52 and Lock 52 Aux1
Tennessee River: Kentucky Lock
Tombigbee River: Demopolis Lock
Table 1 provides an explanation of the report format, field location and
definitions. All tonnage figures are presented in Ktons (1000 tons) rounded
to the nearest tenth of a Ktons, therefore the total may vary from the sum of
the upbound and downbound tonnage. The report includes the differences in current
and prior year tonnages and barge counts as well as the percentage increase or
decrease from the prior year for the monthly and year-to-date tonnage totals.
The percentages are computed by dividing the total monthly/year-to-date
tonnage differences by the total prior year monthly/year-to-date tonnage. They
are multiplied by 100 and rounded to the nearest tenth of a percent. Due to
sporadic use of auxiliary locks or large differences in monthly and/or year-to-
date totals, percentages which are extreme may be produced. Percentages that
exceed 999.9%, as well as those where prior year totals are zero, are represented
by asterisks (****.*) in the percentage fields. In the case of the new
commodity code 80, where data is collected beginning February 1993, the
monthly/year-to-date comparison will not be computed until February 1994, and
"N/A" will appear in the difference columns until that time.
Table 2 provides definitions of the commodity codes. Table 3 provides
District and Division symbols used in this report. Figure 1 locates each of the
key lock sites. If you have any questions or suggestions contact David Lichy at
(703) 428-9052 or Maggie Moses at (703) 428-9061.
TABLE 1
Report Format
K E Y L O C K R E P O R T
Page number
RIVER NAME DIVISION SYMBOL MO/YR FOR WHICH DATA COLLECTED
LOCK NAME DISTRICT SYMBOL DATE REPORT IS RUN
COMMODITY Totals(ktons) from first of
CODE Monthly totals(ktons) calendar year thru month chosen
difference difference
from from
up down total prior yr up down total prior yr
----- ------ ----- ------ ---- ----- ----- ------
(Commodity Data)
----- ------ ----- ------ ---- ----- ----- ------
Totals(Ktons)
EMPTY BARGES
LOADED BARGES (Barge Data)
----- ------ ----- ------ ---- ----- ----- ------
Total No. of barges
Months no data submitted - current yr % change from prior yr (MO ktons)
Months no data submitted - prior yr % change from prior yr (YTD ktons)
TABLE 2
LPMS Commodity Codes
Code Commodity
10 Coal, lignite, coke
20 Petroleum and petroleum products
30 Chemicals and fertilizers
40 Crude materials, inedible, such as:
Forest products, pulp
Sand, gravel, stone
Iron ore
Marine shells
Non-ferrous metallic ores
Sulphur
50 Primary manufactured goods, such as:
Paper and allied products
Concrete
Iron, steel
Non-ferrous metals
Wood products
60 Food, grain, farm products
70 All manufactured equipment
*80 Waste material, such as:
Garbage
Landfill
Sewage sludge, waste water
99 Unknown commodity
* New code; data collection beginning February 1993
TABLE 3
U. S. Army Corps of Engineers District and Division Symbols
Mississippi Valley Division - MVD
St. Louis District - MVS
New Orleans District - MVN
Rock Island District - MVR
Northwestern Division - NWD
Portland District - NWP
Great Lakes and Ohio River Division - LRD
Nashville District - LRN
Louisville District - LRL
Huntington District - LRH
South Atlantic Division - SAD
Mobile District - SAM
Southwestern Division - SWD
Little Rock District - SWL
Comments or Questions Contact: NDC
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