II. lj)vcji)y I'onil, Alhion lowMship, Kciinchcc Counly; 



I. Nuhbic I'lind, Uayinond rowiiship, Cuiiiburlimd County; 



J. I'ullcc I'luul, Winslow Townsliip, Kennebec Coiinly; 



K. l1eas:Mil I'ond, liUhlluld and (iardnicr lownships, Kennebec County; 



I.. Piisliaw I'ond, (itenburn, Old Town, Orono and Hudson lownships, I'enobscol County; 



M. Sal>atlus Toiid, Saliatlus, Cireen and Wales lownships, And[usco)^in County; 



N. Salmon Lake. Ilel!;rade and Oakland Townships, Kennebec County; 



O. Scbaslicook |jke. Newport township, I'enobscot County; 



I*. Spauldni); I'ond, li;banon Township. York County; and 



O Webber I'oiid, Vassalboio lownsbip. Kennebec County. 



1977, c. 373, t; 31 



i)i;i'artmi;nt oi' invironmkntal i'rotixtion 



ItllKKAU (>»■ WATIR QUALITY CONTROL 

 RIXiULATIONS 



Ihese regulations are ciirrenl as nl the date printed on the cover of this booklet There may 

 have been chaii|;es alter Ibis booklet was printed Tlie reader is urged to contact the Hureau of 

 Water (.Hiality Control 2117 2H'*-25yi or the Citizens' r.nvironincniul Assistance Service 

 l-8IH(-452-l942 il there are any (piestii>ns. 



58I-I - 581.7 WATLR QUALITY EVALUATIONS 

 I'lHXTIVL DAI i; N0VI;MBI:R 29, 1973; AMENDIiD IJATli MARCH 14, 1977 



581. 1 Assimilative Capacity -Rivers and Streams 



Tor the purpose ol coinpiiting whether a discharge will violate the classillcation ol'any river 

 or slreain. the assimilative capacity of such river or stream shall be compuleil using the 

 minimum seven day low How which occurs once in ten years Waste discharges shall be 

 appropriately reduced when Hows tall below the seven day ten year low How it the board 

 determines that such rcdiiclioii is necessary to maintain such applicable classiricali(ui 



581.2 Minimum l-'luw Regulated Rivers and Streams 



lor regulated rivers and streams, ihe IX^parliiiciit may establish a niminmm How necessary 

 to maintain water ipialily stand. irds Ihis How will be based upon achieving the assigned 

 classillcation. criteria and protection ol ihe uses ol the stream The IX:partmenl will coo|x:rate 

 with appropriate lederal. Slate and privale interests in the development and maintenance ol 

 stream How rei|uirenieiits 



581.3 Assimilative Capacity (ireat I'onds 



Ihe liytli.iuhc residence lime will be used lo C(Ui)pule the assimilative capacity ol great 

 ponds Hydraulic resilience lime will l>e computed by dividing lake volume by the product ol 

 watershed aiea and llie pieclpitation riiiioH coeliicient. 



58 1. 4 Reserved 



581.5 /one of I'assage 



All discharges ol |)olliil.ints shall, at a mlninuim, provide lor a zone ot passage lor 

 rree-swimming and drilling organisms. Such /one of passage shall not be less than '/i ol Ihe 

 cioss'seclional area al any poini in the receiving body ol water Such zone ol passiige may Ix; 

 reduced wlieiievei Ihe .ipplicaiil loi a dischaige can demonsliale that (al l>ecause of physical 

 phenomena in Ihe receiving body ol walei such minimum /one cannot be maintained and lb) 

 such minimum /<uie ol p.issage is not necessary lo protect organisms in the receiving body of 



3-B-56 



