Water Quality Evaluation in Rice County 1972

8/6/2019 Water Quality Evaluation in Rice County 1972

1/64

,O


2/64

IntroductionDuring 1972 National Biocentric, Inc. developed a basic"

testing program for the evaluation of midwestern lakes and ':.streams. The design of sampling procedures, selection of

. .- : .' . ' _- :1" :

-.. _ !"-testing methods was the result of contributions by our own:. . .~:-staxf scientists, consultants and publications and reviews of ' ~ . : ~o p e n Iit e r a t u r e , ; : ; : - : ' : : ; }Aparticular concern was to conduct those tests that,' .._::--~-:.~sampling locations, selection of tests to be conducted and.

information to lake associations, connty officials, state"agencies, industries and others. The p.ntire testing pro-,

could provide the maximumamount of meaningful M.;J.,nagement.-

~ ~ L :_ - ~_

gram, of course, was desiqned to be conducted within the ~ : . < : : . , . ; - ~ ~budget lirni ta tions of the sponsor. Toward this end, there-. . -'.k ...'.:-.~:~:~fore, the philosophy of provirting a program that would conduct - ' ~ " ' \ , < - v. ' . " . J ; i ~ 0the important tests on as large a number of lakes as possLbLe ;~i,l:.'. . : :." . ~ .:,~~~was adoptied, Wemake no claim that this proqram has measured. ..: ; : _ - : ; : ; ' " :: ~ : t : : : : :: : : e ~ h i : : o : o : ~ : i : : n : : i::::y d : : a i : : o : : : n : e O : ~ : : ; h, _ . : t ~desirable to conduct tests of additional parameters on cer- .. ~. ',.~':;'!

t a i n l a k e s . : ' - - . }The results of this program will provide sponsors with a -- ."~-:",.""p r e l i m i n a r y e v a l u a t i o n o f a l a r g e n u m b e r o f l a k e s a n d s i ~ : i : , _ r ~ ton' those lakes on whi.ch to base their water management deci- . :.'.'-~". . - . '_ . ' ~_ .:'. .~ - :~si.ons , It is ant.icipated that these basic tests wl.ll be con-. < . ' . ~"i-':. - " : - ' : ' ~ iducted on a yearly hasis for sevezaLyears to provine not only.' ....;,,


3/64

,.a firm baseline of water quality hut also to determine the

.' .,.

not been instituted. In others meaningful abatement programs '.;.have been initiated. .The results of this evaluation identify :

.

..grams are needed.

..

certain lakes where new or expanded pollution abatement pro- : . : :< . " . . . : ~. r :.. _

_o 0:;. - ~--7... _

_ ': .. . - .>, '+:-~

_ - : - - . . . . .

-::._"i_-" . - - ; ," ..~ : _ ". _ ' - .,,'.:.~

- -

:;...;_ : :. . :~. ~ . . ' . . ~ . ; ~ : ;~ ~;..~._ - ''- - . . .

... - . - ;~.,: , -

. .


4/64

,' " , '" :.,-.~r -

s::e::::: effo rt was m adeto Identify tho se,_"..ndividual measures of wa t.ez quality JUiCh provided the

::.- ." ',.~.

":,. - .

, : 0 ; : . maximum amount of water quality management information.A-recent study on development of a water quality index. .served as an Lmpo rtant; basis for selection of specifictests and development of the index used in this report.*The water quality index w~s derived by using an itterative

-,-Delphi Method developed by Rand Corporation. A panel of--142 persons with expertise a.nwater' quality manaqernent wasasked to consider and rank in importance 35 rlifferentmeasures of water quality. This specialized decision makingtechnique resulted in the selection of nine important parameters

-:','f water quality.,o

< -.~-:. -

solids and evaluated total rather than fecal coli forms for _,T __ :_ : : 0 ' : 0 reoasons of economy. Where appropriate we have determined the. - : - : _ - " .;:-.temperature and oxygen depth profile and auded measures of o~,~. .~-.,

t. . i\-;


5/64

' ] ' ., : _ . . : .

;'~,,:"l" . '

t : . ~ : : - _ , , . _ Water 'Depth: Water depths in the lake were taken with:: ".: .. .: : ,:',5 ".a sonar devf.ce ,1 ~ : _ < ' ~ : :t - : ( , ~'}' ~.-~.> _ . ~ .

isc: Secci disc 'readings determine the visual' < . : .. . _ :" : ': - \ '~ ' : clarity of waters. The readings are obtained by lowering. : ; : ; ,: . ; ~ , : , .a standard 20 em (8 inch) diameter disc with alternate ',~ ' : ; ' , , :: 'black and white quarters into the water to determine themaximum depth a t whi.ch it can be seen from the surface.'..~-.:::".,:~. -:;~:':::'.:: '_;. one of the essential nntrients. ' ..

.. . -:;~~ . - - - , L ; . : : . ' : : ' " : ' " . : ~ : pH is the .1ogarit~ of the reciprocal of the hydrogen.r : '.". a.on concent.r atLon, It 1S a measure of the acidity or alka-. linity of 'a solution. pH 7 is neutral.. - , :. , . ~ . '

~- '_: > : ': . : . \ ' - - .- _' -.

Water Quality Measurements

-~..

>1." 1 - : --

-

I

. .":..,

":_".~- . -;: . :: :-

-.I~"_ ..... . ...,; - .~

_ ' I . '_.

:-

-_ .

f..


6/64

Conductivity: Conductivity is a measure of total ionspresent in waters. It gives no indication of the natureof the substances in the solution. An increase or de-crease in concentration of these substances will be re-flecte~ by an increase or decrease in conductivity.Conductivity is determined by the amount of electriccurrent conveyed through the water.Total Coliform: To determine total coliform, water sam-ples are incubated in selective media for 48 hours. Col=iform data are recorded as most prohable number per I n nml. Coliform organisms are an indication of human orani~al waste discharges.


7/64

Water Quality Index

Each of the lakes in the testing proqram was evaluatedfor ten parameters as follows:1. depth2. socci disc3. temperature4. disso1'lca oxyqen. . 5. B.O.D.68 available phosphat:.\-7. ar:u;lonia8. pH9. conduc tivity ..10. total coliforn

The significance of each of t~cse paraMeters in the overallmeasure of water C!uality in th~ la~e has heen discusser1 ina previous section.To develop a siMplifi~~ ~ethorl.0: comparinq the severallakes, we have deveLopc-I a Hater n:ualitv innex.. The waterquality index is base:i on assicrninq a water yalne numberbased on each of the para;nnters that were me.asured.

r1.'-


8/64

Measurements Included in the {vater Quality Index

Water quality relationship numbers associated with eachof the 'measured parameters are presented in Tables 1-6as follows:

Table 1Table 2Table 3Table 4Table 5Table 6

Secci disc measurementsB.O.D. measurementsAvailable' phosphatp. measurementsAmmonia measurementspH measurementsTotal coliform. . .Water quality values were determined from the graphs asfollows:

1. Secci disc: The maximum secci disc reading takenat the time of the year when the average secci discread.ings wer'ethe lowest was used , This reading wasgenerally taken during the month of August. Insome of the lakes in Northern !>1.innesota,the lowestsecci disc readings were ohtained in June/July.2. B.O.D.: The highest B.O.D. value obtained duringany of the sanpling times or in any samplinq sitewas used to obtain the water quality value number.3. ,Available phosphate: The hiqhest available phos-phate value obtained during any of the samplingtimes or in any sampling site was used to obtainthe water quality value number. ~ . - - -4. Ammonia: The hiqhest ammonia value obtained rluringany of the sampling times or in any sampling sitewas usen to obtain the water C'fualityvalue n1..lmher.5. E ! ! . : As can be seen from Table 5, extreme Ly high orlow.pH values were given lower quality index numbers.The nost extreme pH measurement Nas usetl to deter-mine the water quality value.6. Total Coliform: The highest nUr.Iberof coliformsobserved dur1ng any sampling time or site was usento determine the water quality value.

7

lvater quality values for the six pa r-arrecors discussed abovewere averaged to obtain a comprehensive water quality index


9/64

~ . ~ . ~,,'

r

. : " ~ . "

;.

_...... -

..-

-

. ., 150

lOt)

Table 1:

200

50

o 5 1:0 15 . 2f) 25Secci Disc Reading(feet)

vlater Quality Value Associated with Secci DiscMeasurements


10/64

------------------------------ ------- - ----

1-. _ : "- . ' : .-

-r "!-'

, 1n.o1 3 7.7 8.(; 0.8

_ C _ 7.5 8.7 10.1)AVe. 7.5 8.6 9.~

Dissol ved O xygen ConductivityA 1.5 13.11 17.4B 1.0 14.1 14.5C 3.6 12.9 lfi.9lAve. 2.0 13.5 16.3

A -- 310 318B -- 3"0 312C -- 340 318A Y . . e . . . -- 317 316

B.O.D. Coliform~ 1.2 6.3 3.8B 1.3 5.3 4.7t 1.2 4.4 4.2~ve. 1.2 5.3 4.2

A 3 23 3.B 23 9 9~- 3 15 3_A.Y..e_ II') 111 5


42/64

ID'1IO:'I LA.l(ERICE conarv

Sampling SitesA North endB - South east corner(near Union Creek outlet)C - South '


43/64


44/64

50

45

75

~ TEHPEAA'!:URE O X Y G r : n PROFILEr

Circle-I _jJ. 1 i I : I I , i 1 i 1 1 ~ I + - r - T- I I -1 J.~ ",'._~I 1 , , _l , : ; 1 , j I ... . . i Ii, IFH ~ . ,;. L J ! ; , ! 1 ! 1 ; II 1 , I 1 i ! I ! ,. . . 1 I ! i I I ...1.i ; , : ,.1 _ _ ! _ I I 1 : I 1 I ; , , ; : I , ,

1 1 1 I I , 1 1 , 1 \ 1 I ; . ,. l I I f I U.1 j. ! I , , ! 1 1 ,.1 ! ; ! I r ( I i 1 , 1 i ,..1 ! : I 1 !I I : ! , 1 ! 1 , ,I I , ,I I t ! I I I I 1 , 1 I I J : : _ !_ I I 1I : ..1 I ' I I ! 1 1 i.L , : 1 , 1 : , : I 1 , ; ; !I I ; , 1 1 1 I ,.1 .1 1 I 1 I .L , J I ! 1 : : 1 _l_ : , t I ,! . . 1 . I , : ! !j_ . . 1 . . . . 1 l i j I 1 j_ _l I i :1 I , I! I : , I I , , I 1 1 , : : ; , , ! , 1 , 1 :I , I 1 1 I I , ; . I I : 1 t , I : I 1. . . 1 ...1.i 1 ! I . . . 1 I , . . . 1 _ 1 . I 1 I t : : I : 'j I 1 ,1 i t 1 I I i 1 , I

1 1 I : , : I I I I 1 i , 1I I , ! : I I 1 . 1 I ! I I ! ; I I I .1 , 1 . . . 1 : . l i ! :I I 1 i : : I I ; I 1 , I I 1 I ! ' _ j _ ; .1. , 1 I I, I , ; ! I ! ; ! :J Ll. . . . 1 1 I , i . . . 1 I , I 1 , I I I J ! ; I i II I ; . . 1 . J I 1 L I I , , I ! I : I J l_l I i ' .Ji : i I I I I I I : i , i , ! ! I 11 , , I i 1 : i i i ! 1 1 , I : i : I1 I : I : I 1 I : . . . 1 111 I ! II I I I : i I : : I I

. . . 1 . . 1 . I I L 1 I I I 1 ! I I II I I . . 1 . I 1 _ I _ _ ; i 1. 1 , , , I I II I I i ! 1 , , ! i ; 1 I1 ,. . . 1 . . . 1 I I , 1 ;f L : : I I1 : I I I I ,I I I , 1 1 . . . 1 ! .j , I 1 -: , J ! , I !1 1 I I I I I ! I I I l I : ! !.J j , I ,

1 1 r I 1 , , ! I I , ! I i I I I I1 ; I Il '.1 I . . . 1 I ; 1 I I 1 : i , , I1 I I I I I , i I . . . 1 I _ I _ 1 . . . ! J . . . 1 I I I,V~ .r..J::,,_~ I I I : I , I I iI i I _ L J 1 , I 1 : I i i I I I ! , i 1 I- I ! I IJ .11.1 l.lj_ , iii 1I r . I I I i , I I I I I I 1 I I II I 1 . l _ _ l . . 1 . I I 1 . , II I : ,: I , I : : I I I 1 ! I 1 : : 1 I f, I I , ! , 1 ! r 1 : I 1 1 , ! I : 1 I 1 , :-, 1 . . 1 . J I ; U J. J. ..1 ! i , I i 1. . . . I I I I ! j_ UI. 1. I '.1 II .1 1 . . 1 : ! I I i II I iI r I 1 1 1 Ii.l 1 , , 1 1I i 1 ! I I , ; J. 1 1 . _ j_ , 1

..1 1 i I 1 I JI _l I I J I I i I I 1 II I , : I , I 'j IJ.I I I I I I I I , I ! 1 I! I : I I I I 1 1 I 1 1 II I I , I 'J. rI j_ r :.1 .1 . 1 I ! 1 1 1 11 ~, : 1 ! i IJ1 I , I I I 1 : , ; 1 : 1 , : , I ! : , , ,

/

70

0 10 20 30 40 50 50Depth (feet)

18

15

12

9

6

3

o


45/64

CANNOl-1 LAKERICE CQm~TY

SaTTlplingSitesA - Inlet near Warsa",B - Beach on S.E. sideC Bridge be twe en Cannand NeIls Lakes

Cannon Lake represents the lake with the poorest ~vaterquality in Rice Connty. Nater clarity as reflected bysecci disc readings of less than one foot indicate thatalgal blooms were extensive in this .Lake , Farly summertemperatures of greater than ano 1;.,;rereecorded; B.O.D.levels were quite high in the spring, possibly as a re-sult of material carried down the river and depositenin Cannon Lake. A particularly hiqh B.O.D. level wasfound in the sample taken near the bridcre betHeen Cannonand Wells Lakes in the early summer. Phosphate levelswere quite high, particularly the sample taken off theswi~~ing beach during the winter. AMmonia levels were.quite high though they did decrease later on in the summer.O f particular interest is the sample taken off the swimmingbeach area in the ''linterand in the spring. Coliform levelswere relatively high throughout the perLod of this e"alu-ation, the highest level recorden near the bringe on theout le t of Cannon LaJ:e in th e late suJTtr . te:! :". The conduc tL v ievlevels in Cannon Lake were higher than any other lake inRice County. This reflects the presence of ~inerals inthe lake, possibly as a result of run-off and other sourceshaving high mineral content.


46/64

River System in Rice County

The water quality in the Cannon and Straiqht River Systemsin Rice County is poor. A map show.i.nqsamplinqsites onthe river system is iricluaed at the end of this report.The river system 'vas characterized by hLcrh nutrients andthe presence of coliforM bacteria. B.O.D. levels reachenvalues as hiqh as 12 mq/l, phosphate levels as hiqh asseven ppm and ~onia levels as high as 12 ppm wererecorded. Coliform bacteria levels as high as 72,nnn wererecorded and conductivity levels as hiah as l~nn wererecorded for this river systp~.The river system in Rice County seems to be greatly in-fluenced by the presence of the municipalities along itsbanks. The Cannon River, as it goes through l-10rristOlVJ1,increases in the level of coliforms founn in its water.The levels of coliform bacteria and the nutrient levelsdecrease until the river reaches Cannon Lake. At the out-fall of Cannon Lake there is again an increase in thenu-trient material ana there is a sham increase after theStraight River joins Cannon in down+own Faribault. TheStraight River has quite hiqh levels of nutrients andbacteria all the way from the point where it enters RiceCounty until it joins with the Cannon River in Faribault.There is a sharp increase in phosphate, ammonia ann B.O.D.levels just before the Straiqht River" joins the Cannon,possibly due to the presence of municiDal treat~ent facilitiesfor the city of Faribault, just ahove" this sampling point.The levels of nutrients and bacteria remain quite high fro~the junction of the Cannon and the Straight until theCannon leaves the county in Northfield.The nutrient and bacteria levels in Heath Creek are veryhigh near the source of the Creek 1n Lonsdale. These levelsdecrease as the creek qoes through Union Lake and onto theCannon River in Northfield. The nutrient levels in HeathCreek are still quite high at the point of junction with theCannon River in Northfield.The data from the river system re.f Lect;the impact of mun Lc Lpalities on the watershed system in Rice County. Attentionshould be given to the adequacy of the municip?l treatmentfacility now in operation with emphasis on their contribu-tion to the water quality of the river system.


47/64


48/64

SiteABCDEFGHIJ

K

LM:.

o - N

0p

LocationCannon River above HorristmmCannon River below MorristownInlet of Cannon LakeOutflow of Cannon LakeCannon River near mill in FaribaultCannon River before junction with StraightRiverStraight River whe r it enters Rice CountyStraight 0 River off hiohway Qf) bridgeStraight River South of FaribaultStraight River before junction with CannonRiverCannon River after junction with StraightRiverCannon River at ParkCannon River at bridge below DunnasCannon River whe re it leaves County atNorthfieldHeath Creel,::outh of LansdaleHeath Creek in Northfield

- - -


49/64


50/64

Site Date2/25! 6/7Temperature B.O.D.

A 32.9 79.5 I 81.50 1B 32.9 I 81.3 78.8nC 32.~ 79.5 I 77."'0 1D 35.6 73.4 79.52 IE 35.6 8{).O4 76.10F 34.7 82.2 87.RnG 32.9 78.8 82.4(')I T -- 99.5 83.30I -- 80.0 --J _ 36.5 79.5 86.0()1 < -- -- an.90T, 32.9 75.2 83.84'.f 32.9 77.9 84.2011 32.9 77.0 80.9Fo 32.9 75.2 fi9.S0p 32.9 75.2 8n.60

A 2.70 6.2 i 1.80 IR 1.sn 6D85 ! 3D2FC 1.;)2 ~.21 I 1.47D 1.28 12.2n I 1.5qE 2.35 5.18 3.51"lF ' 3.95 I 7.14 I 5.11G 4.0(; 3.81 1.09H -- 2.Qf) 2.6;;I -- 2.30 --J 10.30 5.41 1~2~K -- -- 5.29L 3.33 5.97 --1 > 1 4.26 3.23 2.1141 - 1 3.59 3.04 2.270 6.93 1n.42 --p 1.nn 8.71 7.35

Dissolved Oxyaen Phosphate- _ .A 6.15 1 1. 2 7 6.85B 7.3n 10.43 6.32C 7.30 12.18 R.S5D 5.35 12.84 11.1.46E IO.Of) 9.69 7.n9F 11. 8 5 7.53 8.03G 9.23 8.94 9.81H -- 9.90 10.18I -- 8.88 --J 11.29 I 10.54 8.60K ! -- -- 8.22L 10.00 9 .. 11 8 6.13M I 8.na 8.29 1n.13.N 3.84 8.79 7.3'10 7.30 I a.591 --p 7.69 I 9.431 8.76

A .s8n .son .753B .634 .475 .78nC .829 .450 .538D .~10 .675 ./:45E .756 .425 .457F .732 .55fl .484G .82q .725 .F45H -- .550 .539I -= .725 --J 1.7Sfi .7nn .431"\K -- -- .511L .878 .725 .5f;4M '1. 122 .fi75 .filAN .78n .7(1) I.Rn20 7.n27 1.044 4.~11p .659 1.flSO I .78n

. _ - .


51/64


52/64

. . . . -.- - F - I C f - i ~ t


53/64

(~o be r ts ) Lak e_.

. .,

i6t' 21, 22;.'

, , " " .

'riO

. - ..:..~ -: :

'.

. f

~.'


54/64

.. 2 -.

(20 feet)(40 feet)thermoe line to support.- ~.' .,

f r G m . : : ~'.

." "_. . .. -

4 _ : ;

in the lake proper-- .ngrass n islands in

."

...

. : .. __.T

".. . .


55/64

- .) - .. I

2.23

Trapnets - 12 Pots 5 Double-p~t 2 Single-pot

2.001.801.501.602.332.007 . 5 01.202.00

Bluegill117183518173

:-.. . ~ 12~t3531! 219

13.484.110.290.034.62.0.040.p842.870.0316.580.361/ ..


56/64

J . j . -. ' .Frequency Distrlbutiqn (continued)~.nl te Yell 0,'; BlackBass Perch Bluegill Crappie

".,112

. .1

.' .. ~.. :

212122441 1

,.'.

I (N )6.f.(21)5.1(21)6.E-(22) .-,'" . ' . .~ \

"

.1\,

-' _ . -.,. .~ -~ . _ '. :~ T

,_ - , _ . -_ ':...~- . .:. .,

....:. . L '~ - .

" .


57/64

~as seined at four places and a total of 2/3?r~~bert oJ: f~h taken are as foll"ol-lS:Fish Fer ~horeline Acre. ~ ~ ~ ~ ~ - - - - - - - - ~45~26E 3 7 0

29

-,

.~._ .

. :~~.:":',.

. ~ . -. ~ :~

. < .::..~:;~. . . . .~ . ._

-_ '. L

"I ... ~ . L", . . ;.


58/64

- 6 _.

Crappies

60 adult

240 adul

1,207 adult 1,305 fgl.2~120 fgI. 735 adult. 7,174 ad1, lXY_ l ff:l. 3,000 f'gl ..E 5 , 3 0 5 fe1 3,750 f~l.60 adnIt5,840 fgl.' ..

],535 Ibs.900 tf10,635 Y T7,0463,000 "35,85812132232,8662,407 fI1,909 II70,282 II8 , 846 "12,1..46 II61 adults

n

IIIIIIn

"~.-~~~~~~. ,. ;...:r "",,"

.'~"' .....' ~.-: .\

::: ': .,!'_ . . ~ :.--------- :

.'l.


59/64

~ . . . ' 0 " . ".'.lass!fi cat ion~~;~;.l:~';.7ECologlal. cIs 5Sif lea tion..ough fish - bass panfish.? e, . . .~ ..'-:~~~t~~~~;Hanaeement Cla3~ friea t ionas s.'- panfi sb - nor thern pike - walleye.Y~ f~ l~~ : ";. , ' : . ' : ' . ' > '. . .IX.-. Summary and DiS cus s~on . . "

E' no natural reproduction of walleyes in,this~,,,~;'.';.lake~.artificial stocking is riecees 81'y if a walleye popule tion.~~':'~-is'o be maintained. The lo\o:rnor ther-n pike population nrust be~1-ft,c;\:,~~:::b


60/64

.4

. LD .IT 3UP'IEY ;"3::1T.Ac':'h ~herds ( Po berts) L ak e ( ~-1 2) . .'. " ~ ~ ' 0 . . . .',,:',. ., '''.:. ;;_ . . . .. -~

". ::.~

" .


61/64

_f~_'_ . T~_T/, .\ ..... I~:~,,-' h~\". . ' 1 1 . . . . ~ . , ; , ~ . ~ ' - . : . . , . . . , - ~ . . . - ' o C T . . . . . - - _ - ~ . .u t t . ~ : .(i..~~_ ''1'~-~ ~ ~ I ~ ! :' ' , ; : ; ~ ? : ; :I c , k ' ; : " ;l . W . ~ ; : _ ~ ~ ; ' ~ " : - : ' ; " 7 : ; 1 ;'t.:.> ": ..Toucrh fish rp.rrovalhaver.provec'. carp, buffalo, anc' sheapshead ..'s ~ ; r ~ " = - . .~--=.::..-r~-;..~:''''~-.ri- .. . ,: I f .. . .. _ '!:) ~ . ii:;;,.~~'ti::i;:::/5i~:'''.:9:'~.;',.-~.'ach ....inter. 1 _ . ; ; to 70 U:oupanc. pounds 'J! car-o have ber-n r-en.oveo > ':'~~""-""'' '"''_ '''~ ';'' '- ' ''O '- ''. "", .. '. . ' 1C, l : "4 ,a~l:) n., , b f'f' ] - ~ hea d :. . . .!.1~,.lr"'. :l."."~:': '. .. .. .; .: .. " ~ i " ' 1 one VE'pr' ..., - .. _.) 1 J~ r"'rI)V9. o I' u__a tj and sne ep sr E_ ' ..~r~!:'Y;'~~''.::;'~;;'::;;~~:'':'-'~9p~ .; th;~"s~i 1 .' - ~ 4 ; ' ; t ; ~ ; ~ : ~ ~ : ~ i ? ~ ~ : . : ~ ; . : > :. . - . . . . . .?t~r;:':>~~~~~.~:-:;".;,.;~!:':~';,:-,~.This 18k~ which ise na,:.urgl r')uf.'h f'ish-~'ess-r!",n fi.sh type -"~1P~t~&f:!~;PE!~~:";~~{! ':~.iQ'flake-\Oli11~ zranap'ec as .a 'oo.FS-ra~ fish-northern pikp-\i&lle~;E':'. .;- '~"A :-"""' '''' ~~ ... l, .._~ .f. '. -'e!.::t;


62/64


63/64

R I ze -C 0, ;, t: : y

C eJ4t"_~AI("_ __ .


64/64

Date post:	07-Apr-2018
Category:	Documents
Upload:	aaron-wills
View:	218 times
Download:	0 times

Water Quality Evaluation in Rice County 1972

Documents