140 
IOWA ACADEMY OF SCIENCE 
fenced off, policed, and where necessary, water should be pumped 
up to the camps from the river under pressure, and in suitable 
quantities, for all purposes, including bathing, and watering ani- 
mals. 
“X. That efficient sanitary control should be had over all 
camps, cleanliness enforced, refuse of all kinds promptly collected 
and burned, drainage filtered and commodious and convenient sani- 
tary arrangements provided and strict control and authority main- 
tained. 
“XI. That the city of Seattle should also fence in the road which 
it has constructed along the river bank between Barneston and the 
power house, so as to prevent access therefrom to the river. 
“XII. That the city of Seattle should regulate and control by 
intelligent sanitary rules the various logging camps now existing 
upon the watershed. 
“XIII. That this would be highly desirable to prevent decaying 
wood and vegetable matter from defacing the shores of Cedar River 
and its important tributaries, and cut off the swamps at the outlet 
of Cedar Lake and immediately above the intake.” 
The writer’s comments on this subject are summarized as fol- 
lows : 
“I may briefly summarize the conditions found by myself in the 
Cedar River Valley and its tributaries. 
1. An investigation of the biology of the water supply leads 
me to say that the water of the Cedar River, Cedar Lake, and 
some of the small tributaries, is excellent; that in some few cases 
pollution has been found, but that this can be remedied by a careful 
inspection on the part of the city and the city should consider it 
its first duty to order a thorough renovation of the objectionable 
places in the watershed of the river, particularly the bad condi- 
tions existing along Taylor Creek and the Miller Logging Camp. 
2. The city should at once prohibit the roaming at large in the 
watershed of hogs and other live stock. These should not have 
access to the water, nor should the sewage from these animals 
pass into the water. It is also of prime importance that where 
villages and mill camps occur, they should have a sewage disposal 
system, which can be operated at a small expense and perfectly 
protect the watershed. I do not think that the sewage from the 
outhouses, etc., on the high plain above the Cedar River at Barnes- 
ton will contaminate the water supply, as the sand and gravel form 
an excellent filter bed, though I would advise some changes there. 
