September 1966 



COMMERCIAL FISHERIES REVIEW 



Table 1 - Water Samples 



of tlie Milwauke 



e Rivers for Chemical Analyses by the 



vlilwaukee Health Department, S 



ummer 1964. 1 









Dissolved Oxygen (DO) is Expressed in Milligrams/Liter and 



Turbidity in Parts/Million. 











75 Feet Upstream 





25 Feet Downstream 



75 Feet Downstream 



Av, 

 Water 



Av, 



Date 







of A 



r Curtain 







of Air Curtain 





of Air Curtain 





Temp, 

 of Air 



Air 

 Temp. 

































6 Ft. 



Depth 



IS Ft. Depth 







6 Ft 



. Depth 



15 Ft, 



Depth 



6 Ft. Depth 



15 Ft, 



Depth 



Curtain 

 °F, 



°F, 





DO 



»/o Sat. 



DO 



% Sat. 



Turb. 



pH 



DO 



% Sat, 



DO 



% Sat, 



DO 



% Sat. 



DO 



% Sat, 







1964: 

 5/8 



4.4 



48 



4.0 



44 







3.5 



38 



3.2 



35 



3.6 



40 



2.8 



30 



68 



71 



5/11 



4.85 



52 



4.1 



44 



60 



_ 



3.2 



34 



3.25 



34 



3.9 



42 



3.75 



40 



66.25 



58 



5/13 



3.76 



40 



3.0 



32 



60 



- 



2.4 



26 



2.25 



24 



2.45 



26 



2.23 



24 



67 



46 



5/15 



5.05 



51 



4.7 



47 



52 



- 



4.5 



45 



4.05 



41 



3.95 



40 



3.95 



40 



61.5 



61 



5/18 



0.6 



7 



0.3 



3 



38 



1.6 



0.3 



3 



0.6 



6 



0.5 



S 



0.3 



3 



67.5 



71 



5/20 



4.8 



54 



3.3 



37 



45 



8.2 



3.5 



39 



3.0 



33 



2.9 



32 



2.9 



32 



70 



45 



5/22 



2.6 



28 



3.15 



33 



42 



7.8 



2.75 



30 



3.2 



34 



2.75 



29 



3.25 



33 



65.25 



76 



5/25 



1.0 



11 



1.0 



11 



74 



7.66 



1.2 



13 



1.1 



12 



1.1 



12 



1.1 



12 



69 



64 



5/27 



1.3 



15 



1.1 



13 



62 



7.68 



1.3 



14 



1.2 



14 



1.2 



14 



0.0 







70^S 



57 



5/28 



1.2 



13 



1.3 



14 



51 



7.6 



1.6 



17 



1.9 



21 



1.5 



16 



1.6 



17 



69 



50 



6/1 



1.6 



18 



1.6 



17 



36 



7.7 



1.7 



18 



1.6 



17 



1.5 



16 



1.3 



14 



67 



51 



6/3 



0.6 



7 



0.6 



7 



29 



7.68 



0.7 



•8 



0.7 



8 



0.7 



8 



0.7 



8 



69 



55 



6/5 



0.2 



3 



0.2 



2 



32 



7.63 



0.4 



4 



0.3 



3 



0.4 



4 



0.2 



2 



68 



58 



6/8 



1.3 



14 



1.1 



12 



31 



7.6 



1.1 



12 



1.2 



13 



1.3 



15 



1.3 



14 



69 



64 



6/10 



1.2 



14 



1.25 



14 



33 



7.5 



1.4 



16 



1.4 



16 



1.6 



18 



1.6 



18 



72 



59 



6/12 



0.8 



9 



0.8 



9 



30 



7.5 



0.9 



10 



0.8 



9 



0.6 



7 



0.7 



8 



70 



68 



6/15 



0.45 



5 



0.3 



3 



30 



7.5 



0.4 



5 



0.4 



5 



0.4 



5 



0.4 



5 



73 



60 



6/17 



0.85 



10 



1.75 



20 



27 



7.6 



0.8 



9 



1.5 



16 



0.7 



8 



0.8 



9 



70.75 



62 



6/19 



7.8 



85 



6.2 



67 



25 



7.6 



4,4 



50 



5.1 



55 



4.3 



47 



5.6 



60 



67 



81 



6/22 



0.6 



7 



0.5 



6 



20 



7.5 



0.5 



6 



0.5 



6 



0.6 



7 



0.5 



6 



73 



68 



6/24 



0.8 



9 



0.3 



3 



48 



7.6 



0.5 



6 



0.4 



4 



0.6 



7 



0.4 



4 



69.5 



67 



6/26 



4.7 



S3 



4.1 



46 



28 



7.78 



3.4 



37 



3.4 



37 



3.1 



35 



3.0 



33 



70 



82 



Mean 



2.29 





2.03 





40.62 



7.32 



1.82 





1.87 





1.80 





1.74 





68.74 



62.45 



Median 



1.25 





1.50 





37.0 



7.63 



1.35 





1.45 





1.40 





1.20 









June, a few appearing in July and sometimes the early part of August, Observations during 

 the study indicate that the alewives move through the entire cross -sectional area of the river, 

 do not move at any specific depth, and that migrations may be related to temperature or other 

 weather factors. 



In early May, the local fishing fleet reported that the fish had moved close to the harbor 

 area by the time the study began. Later reports by commercial fishermen indicated that large 

 schools of the fish were present in the lake and also in the main harbor and lower river. They 

 reported, however, that fish seemed to move constantly between the air curtain and the outer 

 harbor. Few fish were seen at or near the air curtain at most times. 



A visual survey was 

 made three times a week to 

 determine numbers of dead 

 fish in the areas above and 

 below the air curtain. All 

 such results were recorded 

 and returned to the Health 

 Department for analysis. In 

 addition to these observa- 

 tions, local commercial fish 

 operators made echo -sound- 

 ings throughout the test pe- 

 riod and were able to deter- 

 mine concentrations of fish 

 in the various areas of the 

 rivers, harbor, and lake. 

 All observations made by 

 commercial operators, as well as their catch, were recorded and retained by the 

 Health Department (see table 2). 



Table 2 - Alewives Harvested by Commercial Fishermen from the 

 Milwaukee Harbor During Air Curtain Study, Summer 1964 



Date 



Location 



Fishing Gear 



Catch in Pounds 



1964 

 May 16 



Outer Harbor Xmile North of River Mouth 



Outer Harbor - North Cut 

 South of Air Curtain 



Lampara 

 II 



350 



600 

 1 



May 20 



Outer Harbor 



Kinnickinnic River Mooring Basin 



Lampara 



400 

 125 



May 29 



Outer Harbor 



Trawl 



600 



June 2 



Outer Harbor 



Trawl 



2,000 



June 3 



Outer Harbor 



Trawl 



3,450 



June 4 



Outer Harbor 



Trawl 



1,500 



June 11 



Outer Harbor 



Trawl 



925 



Tota 



1 



9,951 







