FLOOD06466

• County: Statewide
• Basin: Statewide
• Title: Techniques of Water-Resources Investigations of the US Geological Survey Discharge Measurments at Gaging Stations
• Date: 1/1/1969
• Prepared By: USGS
• Floodplain - Doc Type: Educational/Technical/Reference Information

12

TECHNIQUES OF WATER-RESOURCES INVESTIGATIONS

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Figure 14~--Parts for round WCIding rod.

meter is attached beneath the connector, and
the sounding weight is attached to the lower
end of the hanger.
There are three types of weight hangers (fig.
19):

I. The Columbus or C type, y, by % by 12
inches (for weights up to 150 pounds).
2. Heavy weight, % by % by 18 inches (for
200- and 300-pound weights).
3. Heavy weight, y, by I}, by 18 inches (for
200- and 300-pound sounding weights
which have the slots properly extended to
llccommodate a I}>-in. hanger).

The Columbus hanger has three holes in it in
order to properly position the meter. The
hanger screw of the current-meter yoke is
placed through the bottom hole to support the
meter when a 30-pound sounding weight is
used. The center of the meter cups is then 0.5
foot above the bottom of the weight. This
llrrangement is designated as 30 C .5, which
means that a 30-pound Columbus weight is
being used and the center of the meter cups is

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Figure 15.-Round wading rod with meter attached.

0.5 foot above the bottom of the weight. The
hllnger screw goes through the middle hole
when 15- or 50-pound weights are used. The
designlltions for these arrangements are 15 C .5
and 50 C .55. Tlie hanger screw goes through the
upper hole when 50-, 75-, 100-, and 150-pound
weights are used. The designations for these
arrangements llre 50 C .9, 75 C 1.0, 100 C 1.0,
llnd 150 C 1.0. Each of the two heavy-weight
hangers has only one hole for the hanger screw
of the meter. The designations for these
arrangements are 200 C 1.5 and 300 C 1.5.