567—52.8 (455B) Designated protected flows of streams.
	   52.8(1) Purpose. The protected flow is designed to protect and maintain adequate water supplies for ordinary household and livestock use; for fish and wildlife use; for recreational use; for in-stream wasteload assimilation and pollution control; for beneficial water use needs in the watershed; for preservation of aesthetic values; and for other uses of a public nature.
	   52.8(2) Protected flow basis. The protected flow is based in part on statistical information contained in “Low-Flow Characteristics of Iowa Streams,” (INRC Bulletin No.	9 (1958)), “Low-Flow Characteristics of Iowa Streams through 1966,” (INRC Bulletin No.	10 (1970)), “Annual and Seasonal Low-Flow Characteristics of Iowa Streams,” (INRC Bulletin No.	13 (1976)), and “Statistical Summaries of Selected Iowa Streamflow Data Through September 1996, U.S. Geological Survey Open-File Report 98-176 (1998).”
	   52.8(3) Protected flow levels.
	      a.    	  At stream gaging stations. The protected flow, expressed in cubic feet per second (cfs) at points on a stream with an official U.S. Geological Survey stream flow gage are listed in the table below.
The Protected Flow at U.S.G.S.
Stream Gaging Locations
River or Stream	Gage Location	Protected Low
Flow (CFS)	
 	 	 	
Beaver Creek	New Hartford	18	
Big Creek	Mount Pleasant	2	
Black Hawk Creek	Hudson	4.5	
Boone River	Webster City	24	
Boyer River	Logan	41	
Cedar River	Conesville	1240	
Cedar River	Cedar Rapids	937	
Cedar River	Waterloo	710	
Cedar River	Janesville	185	
Cedar River	Charles City	100	
Chariton River	Rathbun	2.9	
Des Moines River	Keosauqua	350	
Des Moines River	Ottumwa	300	
Des Moines River	Tracy	300	
Des Moines River	Des Moines (14th St.)	300	
Des Moines River	Saylorville	200	
Des Moines River	Stratford	310	
Des Moines River	Fort Dodge	220	
East Fork Des Moines River	Dakota City	42	
East Nishnabotna River	Red Oak	37	
East Nishnabotna River	Atlantic	18	
Floyd River	James	22	
Iowa River	Wapello	1390	
Iowa River	Lone Tree	150	
Iowa River	Iowa City	150	
Iowa River	Marengo	204	
Iowa River	Marshalltown	104	
Iowa River	Rowan	21	
Little Cedar River	Ionia	28	
Little Sioux River	Turin	200	
Little Sioux River	Correctionville	106	
Little Sioux River	Linn Grove	42	
Maple River	Mapleton	50	
Maquoketa River	Maquoketa	372	
Middle Raccoon River	Panora	20	
Middle River	Indianola	14.6	
Monona-Harrison Ditch	Turin	27	
Nishnabotna	Hamburg	128	
Nodaway	Clarinda	15	
North Raccoon River	Jefferson	82	
North Raccoon River	Sac City	14	
North River	Norwalk	5.6	
North Skunk River	Sigourney	35	
Raccoon River	Van Meter	190	
Rock River	Rock Valley	26	
Shell Rock River	Shell Rock	147	
Skunk River	Augusta	287	
Soldier River	Pisgah	20	
South Raccoon River	Redfield	58	
South River	Ackworth	4.1	
South Skunk River	Oskaloosa	94	
South Skunk River	Ames (below Squaw Creek)	23	
South Skunk River	Ames	4.8	
Thompson River	Davis City	13	
Turkey River	Garber	210	
Upper Iowa River	Decorah	80	
Walnut Creek	Hartwick	2	
Wapsipinicon River	DeWitt	150	
Wapsipinicon River	Independence	17	
West Fork Cedar River	Finchford	66	
West Fork Ditch	Hornick	12	
West Nishnabotna River	Randolph	67	
West Nishnabotna River	Hancock	49	
White Breast Creek	Dallas	3.2	
Winnebago River	Mason City	39	
	      b.    	  At stream locations other than gaging stations. The protected flow for points on a stream, other than at a U.S. Geological Survey gaging station, shall be established, as the need arises, by comparison of available stream flow data and basin characteristics.
This rule is intended to implement Iowa Code sections 455B.261, 455B.262 and 455B.267.