This past Monday generation began to change from the continuous around the clock 14,000 plus CFS or more and is now down to under 4,000 CFS during the night and early morning hours. This makes for some dramatic fluctuations on a unit and a half to just about 8 units or a 12 foot difference from the early hours of the morning to the afternoon. This of course is churning up this annoying moss we have and adds to the frustration of nymph fishing on the bottom. However some dry fly fishing with sulphers on the surface is possible and on the lower generation levels hoppers and floating ants with a dropper is getting productive. The mayfly hatch of sulphers continues along the river mostly in the afternoons when it gets much heavier. The past few years we began seeing sulphers on the upper end of the river and are now seeing a big hatch of these bugs at the dam.
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The dissolved oxygen or (DO) on Norfork lake is not looking good at this time and has dropped since last month. Here is a quick overview from the Crystal Cove area and the data was taken on the 25th of June.
Surface the temp is 91.4 and the DO is 7.53 –
25 feet temp is 73.4 DO is 8.31-
At 30 feet the DO really changes. Temp is 70.3 and DO is 3.19-
At 50 feet the temp is 62.1 and the DO is 1.47
At 78 feet the temp is 52.3 and DO is 1.51.
Here is the DO data at the 62 bridge taken on the 24th of June:
At the surface the temp is 87.8 and the DO is 8.7
20 feet 81.9 DO 12.35
25 feet 74.7 DO 8.53
50 feet 62.1 DO 2.2
75 feet 52.5 DO 3.29
100′ 48.2 DO 1.59
125′ 47.3 DO 0.25
Bull Shoals Lake DO taken near the Dam:
O feet temp 86.2 DO 7.3
25 feet 70.3 12.5
50 feet 58.6 10.2
75 feet 54.3 9.6
100 feet 51.4 10.0
130 feet 47.5 10.7
190 feet 43.3 9.8
The DO is much lower further up Bull Shoals Llake like it is on the Norfork:
At 0 feet temp 87.1 DO 7.1
25 feet 70.0 8.5
50 58.8 7.4
100 51.4 8.2
130 46.8 8.1
160 45.5 7.8
Good fishing.
Jim 6/29/10
Here is the Data at Oakland.