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Home My WebLink About20081012.tiff • • . 7 1L a 7I- . Your Touchstone Energy' Partner ,ct-k ' United Power , Inc USR - 1629 January 2008 • Who is United Power Electric Cooperative Founded in 1938 Serve 17 Cities, 6 Counties Over 800 Square Miles Over 5 ,469 miles of line Headquarters in Brighton Regional Offices - Fort Lupton & Coal Creek Canyon 64, 000 plus meters EXHIBIT 2008-1012 1 nts9., • • What is a Substation Transition point from Transmission Voltage levels (incoming) to Distribution Voltage levels (outgoing) 115 . 000 volts to 12 .470 volts Non-polluting Low Noise Controlled Environment National Electrical Safety Code Environmental Protection Agency • How does United Power Site a Substation Proximity to Load Center ( Near Growth) Near existing Transmission Line Agreeable Seller ( Landowner) Technical Feasibility Environmental Feasibility Evaluated Land Use Aesthetic Considerations • 2 • • Time Line July 2001 — Long Range Plan ( LRP) created by ESC for United Power ( UP) , identifying the need for a substation in the area to be constructed 2006 — 2010 January 2004 — LRP updated and confirmed the information of the 2001 LRP December 2004 — Started evaluating potential sites west of 1 -25 along the Tri-State transmission line June 2005 — Met with Town of Mead , Town Manager ( Michael Friesen) to start discussing new Substation November 2005 — Started working with owner's representative for Mead Crossings on potential sites within the business park June 2007 — Never received concrete information or cost for parcel within Mead Crossings ( Never could come to terms after 18 months of discussion) • Time Line June 2007 — Started experiencing low voltages in area west of 1 -25 , north of Hwy 119 and to our north territory boundary . July 19 , 2007 — Re-evaluated all sites, contacted current landowner site July 20 , 2007 — Met with Town of Mead , and interim Town Manager ( Dan Dean) July 25 . 2007 — Discussed substation with Weld County September 2007 — Mead Crossings notified that they were still being considered . but another site was now also being considered . Their response was. "That is not a problem because we didn't really want a substation in the business park." September 2007 — Submitted both RE and USR applications to Weld County Planning Dept U • 3 • • Time Line September 2007 — Met with Town of Mead . informed Town Manager ( Dan Dean) of what was happening . and what UP had submitted application for October 19, 2007 — Met with Centex October 23, 2007 — Notice sent to affected landowners November 12 , 2007 — Open house held at Liberty Hall Grange November 20 , 2007 — Asked for continuance from the Planning Commission to develop working resolution of differences December 2007 — Re-evaluated . re-contacted other landowners to determine potential other sites December 2007 — Meeting with Town of Mead — went over new photo renderings from Stanley as well as new grading plan and GA • Time Line December 2007 — Meeting with Centex and HOA Representative — went over new photo renderings from Stanley as well as new grading plan and GA January 2008 — Evaluated jointly developed landscape plan with Centex and HOA Representative • 4 • • • Design Land Layout Aesthetics Fence Grading Views rl Design - Land Ian. _. _ ' l r i•1 1 ,i 1 , - 1 .. Town of . r . Mead e .. 1 i • • •: : . , f ; �S •ii.` L t. < 1 •• \ . I, - /, r +�•:ler ,' I. $Bier � .'.., F_3 t > 7jig- .„,t -: )w _ I I I . it • •• +y k"'1t,.1%.'` t c't )-, •,1 t- , , i t..'t.":11;,'"4-1:i S.ax:.hi j• l ,.• •. iIIf t • ,. :,�x• r? r r E9T. : *ill - . �±. ." . l /n s vl . - r id- r /• t , 'Y` '.` % 4 _ :• ta" I f 1 10 •4'11-4. - ..L. .. , -r . .. - ,1- • 5 • • • Design - Land .III; � United Power Parcel Selections . 1*� `. w . ,r : 4 ' � , -, !i mil. .. a r.— ..., _. �. r I 4 �. . _ _ _ill > t r V.lc- ' - r — _ r- • • U111W1{t0{aiVUII 1 / '3 4 r i Expansion I Ins ,.da - _Ej,1 - v • 71 - •_ 1Ilion want $ 7 ay - SIAM' .., • tar d 6 II IL_ r 1,- , it -r - > i - t.SilSi � _. Y� r `� M Lam. P^�yy • l-Dart ‘4..../. - ‘4..../ a 4S t 43.Sleep Ye •r r 1 di a orl n' ' 23.Centel. .2 r 111 ��I Y 5•'ltad C mrma. '....' 6•Q'ate rfront t, r . 5- Hu prarrdet 11 • Design - Land P Slater Pro ert . & United Power proposed electrical substationI - ; ! `..` n'r r"�'P �l� i 1 t Sri- . I r�---;r , j ' a 1 I W ub khr 1rylrta ] la I I n F. ) , ' le AeN • Y~ I 1rr 7 Looted Boa sole-Ancor.Ce..W.rf a pearly, i Batt dared-Fourth tour*Mat' i ICO ROW) Cesar daYsrd-JO raw ertarara r1YOM Cahn•Win rare NnM..IN 1 •1:W,u r t'aO.+a.ar ride a praporyl n.e d.Yree-Fropc..d]U thud Perryr 'cc la1.ltM,a { a..ann n.+..n.-. ., . .............. ... . II II 1 ' cc- w<lt Ai r<--�--' - f r n -- - - - —� 12 • 6 • • • Design - Layout AK .- �I i • .'s r -�.y 1 nil w t uurrrei 1 i II? , : h I Y Irk, r v 'Cr 0 tL. — ■A Put' ~ I .4—�.f ..t--Y - a .... ...__ • i e a ;COMM! 1F • TX 11 ." I A\ ? i: .... • _. a s ' --c, a some ri •.-.m.,-+.—wag top— I Slit I AEU li— ea .dear_.r•••••air rillittlIT —_ a 13 • Design - Layout 4 I i • I r • _ • is...........—........ +. :_ u Ti III -` -ll I. • •a Poltava Watt in. ly _ Lam w{l H1114 Vt1 rI M1 sum 7 . , o • S Design - Aesthetics ( Fence) _ _ ro Gt C-,�,-+� p ,, P • �� 1. .- ,7- 7.i � bti TC'- -:J-<`-'t n- y cc...A ;1., . _•• -- - ::-:‘,..... „` tic' _ W- _ k.tNITED Slater Substation - Looking Southeast - Stanley Consultants 15 • Design - Aesthetics (Grading ) r -- III ; I __ r— _ •�+ .—. ..r \ �_ T si i i}1 M 11 1 a I , . 1 .1 ' 1(1111K IIIIIIIC 1 .. if' =cupl i .. i '4 `f�� I • .� wi=w I _la�ala t A J -•- S�� f + ,...a. as r� �'. �:�T �.r_:.�..�� II —_---1ii own Sat aO is -.•...0....-••••••• vase 1 Aisii r r` air 7. all U.. r 8 • • • Design - Views ( East Looking ) --_ • ZIA A- • .r • Design - Views (Westerly View) _s- „ 18 • 9 • • • • Design - Views (South from WCR 5 .5) _� t � •_ 19 i Design - Views (South from WCR 5.5) _ � -- • .f...,7, ... - - �.+ ±_ _ - 20 • 10 • • • Questions? 22 • 11 • • • Electric and Magnetic , , Fields Health Effects , " ., w, Should We be 1 i 4rConcerned ? u*hDr. Robert Pearson Vice President Energy and Industrial Systems _:ces: CH2M Hill t Denver CH2MHILL is ^Came .„. III History of EMF Concerns Concerning Living Near Power # ( Lines_-- 4A' Y' V "kilt • First study done in Denver in the fi b late 70' s vt A second follow-up study done in gi Denver in 1985 • Many more studies done -a 4! '-' throughout the World • Several reviews of the scientific literature have been conducted e- 4t bi. 1 A F4{, _ CH2MHILL 7 tip 'ir • 1 • • II Congress asked for scientific f assessment • National Academy of Sciences r`•.„‘d , r "The results of the EMR-RAPID ir e program do not support the contention that the use of electricity poses a 1014116 major unrecognized public-health danger" "The Committee recommends that no further special research program focused on possible health effects of „.-,6 power-frequency magnetic fields be ti I." 1 funded. " • NAS Report to Congress, 1999 i ` — '- W CH2MHILL ' 1,1, 0 • Congress asked for scientific assessment (cont. ) .14 a `tA National Institute of -; Environmental Health Sciences 4 00 4 "The scientific evidence suggesting } e that ELF-EMF exposures pose any .3 .., ' health risk is weak." "In my opinion , the conclusion of this report is insufficient to warrant aggressive regulatory concern . " WI:!. . s r '41 I , NIEHS Report to Congress, 1999 24-44% • CH2MHILL i x . =tea-. it; - a 0 . • • • Consensus view of most scientists 119)) ' - 4) No conclusive evidence has been 1 shown of a health threat from (8 , ' exposure to power frequency electric and magnetic fields N • However, since we can not prove �� a negative we can not say with - ia absolute certainty that no health threat exists • The probability of such a` health l threat is small r #`w� .: '.-z " ad • CH2MHILL • Common Questions . �- - , `1"' • Will fields give me cancer? If ` Very likely no • Will it cause Alzheimer' s Idisease? . There is no evidence that EMF causes Alzheimer's disease f • Is it safe? Very likely yes .rr t• • c ar. ifs;11 • - _ • CH2MHILL =tom t. : j - i • i • Typical household fields , Appliance Magnetic Field . , (mG ) at l ' y' Hair Dryer 1 to 70 Electric Razor 20 to 100 Dishwasher 6 to 30 Microwave Oven 1 to 200 Refrigerator 2 to 20 Television 7 to 20 4 gbh f� .•• CH2MFIILL • Magnetic Fields Are a Normal Part of Our Daily Life Example of 24-Hour Magnetic Field Exposure 20 s Mean magnetic field • 16 exposure during ,_ this 24-hour period • was 0.5 mG 12 la dngnetic Field a (mG) 1 e4 a Saissirei a 6pm Midnight 6am Noon 8pm .,�t Around house Going to work Work y } Sleeping Lunch Going 4_. tNo electric blanked out home CH2MHILL • felrEMF RAPID CM. \ Brochure � 4 0 • 0 What is the effect of the r y S' proposed substation ? y�kitilit:4;tig- _, ♦ The electric and magnetic fields r t: tiler r: from the substation will decay rapidly with distance •IA% ♦ At the substation fence, the fields will be at levels seen in most ` homes and will continue to decay to levels that are immeasurable outside of the fence „,.. ...4 ia 1 EQ, :,t ii, witl -' • CH2MHILL t . t . _. sire • Conclusion 4-i _ .r. - ,rf �` • There is a low risk of health f ...... . Mii effects from this transmission line nib • The magnetic fields produced by the substation at the fence are ..i. _ comparable to those found in the home or office 1 ♦ We are already exposed to these rat4 , fields on a daily basis ill i lit'^%!fr, • CH2MHILL fver S • • • 4 . 1* . , '• On Rite lei •:� • arli,„410141Pii �.` 1.r CH2MHILL digs ue;- • 1 • • 6 i O . 1 �` ice " A ei4V).r,4� Wt l� , NITED INC. v jj) UNITED POWER.OWE R P.O.Box 929,Brighton,CO 80601 • Telephone:303-659-0551 • 1-800-458-280? Fax:303-659-2172 • http://www.unitedpower_corn --_—____ ( January 29.2004 Ms.Yvonne Seaman Centex Homes 9250 E. Costilla Ave..#200 Greenwood Village, CO 80112 Dear Ms. Seaman: SUBJECT: Frederiksen Farms United Power has reviewed the concept plan for Frederiksen Farms development proposed by Centex Homes. • The development is located within United Powers service area. United Power is ready, willing and able to prQyide both resjdex tjal and commercial electric service to the development. Unit Power does have sufficient capacity to serve the development. United Power is su portive that Frederiksen Farms be included within the I-25 Mixed Use eve opment Area. Ii you have any questions,please call me at 303-637-1254. Know that I look forward to working with you and Centex Homes on the Frederiksen Farms Development. Sincerely, UNITED POWER,INC. /3 r. ' Bill Meier I-25 District Representative BM:cb EXHIBIT I 6. 3 L' R --) ;.d._`9• Your Touchstone Lnc-!rv" rarn':r T • • • NI 1TED POWER .1 1 �1 �_� r: � � I� L �I Auuwst 30. 2006 TO TOWN OF MEAD PIZO�1: Al.-FRUJILLO. SENIOR RIGHT OF WAY SPECIALIST • RESPO\SERECO 1\1E\DAT EO\S FOR NON-E=XCLUSIVE UTILITY EASENTEIS __;_ NAVE OF PROJECT FILING "."-T t. tY IC:I C()\:.... .'�S 0.\ii::771 LIBI:FZ'i'�' RAMC:H 62 AUGUST 24 200 NOT SHOWN \• •i0 :•; :VIDE :ASI-.fit:\!S A<OI'\j I':I:IMET :R`c)=TRAc:TS A.F.G . &P. SMALLER TR,\c:I s C. E. P& Q TO INCLUDE UTILITY USEAGE PLEASE LET ME KNOW !u.. 303-63%-1241 [F I CAN BE OF FURTHER ASSISTANCE ON THIS MATTER AND THANKS AGAIN FOR YOUR HELP. E-MAIL: atru;illo a.;unitedpower.com EXHIBIT • C • v, - A CONSUMER OWNED IT L ,y i • I INITED POWER FAX TRANSMITTAL Aug is. 11,2006 TO: 'l Phone: 970-535-4477 � O F CAF?, c/o�iichaei D. TownFi-iese^. Manager Fax: 970-535-08_: FROM: Al Tr ii11C Senior ' o. Way_c. I.i�.'�t O: Specialist 303-637-1241 `ax: 303-637-1338 • RESPO\SE:RECOMME\-DATIO\S FOR N- X L SIYE L"TI_I_IY' Ei,SElfE1 'S�`^ NAME 0r SUBDIVISION -- . I ` DAT.EOFREFERTiA,:_ COV;M?\�' O\0 'c?OR:^�. 02 JULY'27,2006 AUGUST 16,2006 ' • :0=T WIDE EASEMENTS . AROUND PERLMETERS OF TRACTS AF THRU I AND' • TRACT B &J TO INCL.:DE UTILITY USEAGE PLEASE L A ALL ME DURING THE :NTER1M IF I CAN BE OF FURTHER ASSIST; \CE ON THIS MATTER. THANKS AGAIN FOR YOUR HELP. EXHIBIT • - A CONSUME OWN,c73 TOWN yr MEAD LAND USE PLAN EXHIBIT HEfrata &plin& OF oR*tfllCE 1 c) a p/ - .COUNTY ROOD 40 - - - • R AD 44 911 o j o - o It1 ; f -j I { I r_cc 41 : isitil i . 1,.. -- 2 k i CO NTY ROAD 38 r -'._1 I A Ai .::ssaiII/�1 I - _ - - - .. • ' 1 r —.` A -, __, L I t I- Y 1i tp 1rmat ��r?r - • _:litlimalms i _'• A� . I : Fir . 1,-,___ COUNT- ROAD 36 1 �I"� mi _ ____ II - --- - _-T__ --- I r- ------r— , j I ) w RNO i 1 ` • LIKE Y FF r�. .^ � " 4 3 a �' rEa,l�v t T , 14 . . .. � trNilaJniej , a _�,R,L r Ii I Zj 411;1 I 1 (. '1 1)innd Intl P K(J #T'1 1y iJ7a. ttt4 I all j %'t i f It• r. • ulrrlrz r' 4.64._.144 ..;4.-:, fu_.. 'it! Lt._ cs I. - 1 t-- 11J •.(SAD 3•t rr ,- _tiw -- . 1 < il 7. -t .. I-"Ilan. . - n �_ RyI n . , ? o I 31 i.-�� - - - ___.. _ . _ -: . I. 1 • 1 �_( HP I 3 o tun' pa S._ i it r ; j_ Ir. _, ,- . I J — • . I�;F, t, �n�G� UVtcE , . . . -71. . - r ( v ! ( Tltdus• ( 1 + — (( pig . �, p COON ROAD 32 _ ( was III�1 - -E ' • 51 I ` �'milIr� , / I ^i - 1 to MIII SIM ` HCSEFV(71R I -id' Vino Estates }1 I I 1 II A al • 7., § IS �a 1S y�. i f ,IIIPillii �J♦ 't" L ` - , -1F ' r { I 1— 1 . 's ` rvsii✓. Is RESERVOIP. - "_—_ /i 1 SANBORN , r, • RES£RvOR - s, • ; ill i ill 1 : s , I I� - COUNTY ROA.i: r /I, T. Y i . ,._ „,,....... er& ., %._. If : ._ , ; . _ 0 • ,_ . __ .. _ . _ . . .. , a . , . . ._ . i• O ? -4 i ❑ war. ' / o< , r ._ .. ,__ , ,, _ -- cep- ,4-1° _ ,o) ._ RO JIL. , , Ll I COON pi,Y RDA 126 �h' ea. — _ — r An _ • .., c. _ , ,_ .. , _..., ,CC , T._ -'._ i zi --clip A .,_ . . ;((----sw I tiii- s 1 q__. i i! .a } Ih[1 = }il St. Wan. `'; 11 fe td �€ LiI rcc 1),J-- r :� .ARK - `$ A$ MAAri..l . )- r---. �'t'�i.,1 i!, Le•�. t- C Y0 1I Z Z ON �� f itiI I as Si I t cz"acs Z ^ x(9&1 k.; 2 r Y 3 f37 ! z pF,.7, a —cri Z _I __ _. a= ` _ �, — / - �_ COLOR O I 9 - �.�, 1� :I COUNTY ROD 24 )t i/ - - - TIT of ti It 9 2000 000• 0 2000' 40C L LEND La deir LAKES, PONDS & RESERVOIRS - -. PUBLIC PARKS (81 8 ACRES) iI 1 1 L. IiiiM OPEN SPACE i I Ilia AGRICULTURAL (11,035.2 ACRES) �.� L_ Li e -g : PUBLIC USE/SCHOOL (126.4 ACRES) I- -or • X WIM HISTORIC (23.8 ACRES) f NEIGHBORHOOD OR VILLAGE COMMERCIAL (19.1 ACRES) - DOWNTOWN COMMERCIAL (19.2 ACRES) ! GENERAL COMMERCIAL (1,840.0 ACRES) SEMI OFFICE (38.6 ACRES) - BUSINESS PARK (1,474.0 ACRES) .__ .' ibt ______ IriMi INDUSTRIAL (325.7 ACRES) 8 VERY LOW DENSITY RESIDENTIAL (11,035.2 MI a--a ," NOTE: (D - 0.4 DU/ACRE) ACRES) ` a Ai.. .v OW DENSITY RESIDENTIAL (6,541.3 ACRES) ___ - f= MIS DENSITIES LISTED HEREIN ARE GROSS co �O.5 - tDU/ACRE) ham: MEDIUM LOW DENSITY RESIDENTIAL (2,519.1 ACRES) E'er r ( _� FFORSSUCH OISSUES ADS RIIGHTO OF-WOYNT (t 1 2 DU/ACRE) - { DEDICATIONS, STORMWATER FACILITIES, OR MEDIUM f�ENITY RESIDENTIAL (1292.5 ACRES) ,__� UNBUILDABLE AREAS. THUS LAND USE (3 - 4 DU/ACRE) •-- MEDIUM HIGH DENSITY RESIDENTIAL (3838.4 ACRES) � •r DESIGNATIONS ARE GENERALIZED ONLY (5 s DU/ACRE)E) Y�— tat. 1— AND DO NOT GUARANTEE LOT YIELDS FOR HIGH DENSITY RESIDENTIAL (355.0 ACRES) -• r . `t ' SC' ANY GIVEN PARCEL. (7 - 8 DU/ACRE) , 1111.8 .� r it m VERY HIGH DENSITY RESIDENTIAL (49.3 ACRES) snit (9 - 14 DU/ACRE) __ Li xIS I' P FUTURE PARK �I" ., //1 TOWN OF MEAD P. TOWN ANNEXATIONS (CURRENTLY UNPLATTED) ' " `-��^� � ' V LAND USE PLAN o MEAD AREA OF INFLUENCE •-- - . :. ST. VRAIN STATE PARKiitinaNii I SEPTEMBER 27, 2OO4 ST. VRAIN SANITATION DISTRICT N O' To o • ~�\�-) J•R ENGINEERING o O A Westrian Comm N co 9 ORIGINAL PLATTED TOWN AREA X (SCALE 1"=400') 2620 East Rospeel Road Sate 19()•For( (drs, CO 8)525 970-491-9888•Fax 970-491-5934•witivitergneena.cam x• ,p„..1 . , ...„:,„AC•...• • •f .t .'p. 4 fa �. t i s.fz,: .. �r i. , C; f Y 1 •"-.,:?..4,;t A 4 }�, " trt t. �i/ I yr s k.. $..t.•si �'r ` 't.1-,1 3 4A'1 4. 1.-t: I i • tr.4,...;*,-‘‘,..„ 4t ;A-'4 f., tiI r• �;..: $ r::',..,... ,',./',,'i.';_ . .::....,i,,I.'1:. • I _P f ,( ti a f CI •1` .,.... ,..,:..<...,.. Fat /■..... - • a .• .. 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' U"). 4 -,, 11.,..' 1 a al 1 F 3 I t+-�c; .y a) c ,,,...,_ s .,. • ,..f-66� Yd t .:,-.1 �+ '..:' ...=;...7?, ....:........,-.. ,'_ .. :..., . :. : .*.„..5,.' „,.;,...„:.-. .. . .,.,.. .. .„.. . . . ,, , . : ,, 'YII)!: 4. . ..., . ,. , ., ,,,,.. ... ' ,, ,, ,, ... .. ,, ,, , . „gl f 91 ° Coping with the Risk of Cancer Near Power Lines Page 1 of 8 • • Coping with the Risk of Cancer in • Children Living Near Power Lines Eileen N. Abt* Introduction Risks to children living near power lines have been a public health concern since 1979 when a epidemiological study linked exposure to electromagnetic fields (emfs) with childhood cancer,1 and this research was sensationalized by Paul Brodeur.2 While epidemiological studies have found a correlation,3 and children have relatively few exposures to account for observed associations,4 overall research still leaves much doubt. In fact, a panel of eleven prominent scientists,the Committee on Interagency Radiation Research and Policy Coordination (CIRRPC), has stated:5 Epidemiologic findings of an association between electric and magnetic fields and childhood leukemia or other childhood or adult cancers, are inconsistent and inconclusive. No plausible biological mechanism is presented that would explain causality. They conclude that there is no justification for a major expansion of the research effort to investigate the health effects of extremely low frequency emfs.6 This must be taken in the context of about $20 million now being spent annually on such investigations - - about half of this by the Department of Ener andThe Electric Power Research Institute _ (EPRI), an industrial research organization. any believe that DOE and EPRI sponsorship may lead ti r'.. ias, a 'n any case, the p�ulc is less likely to trust their studies.8 The population at risk and the uncertain research picture makes public communication about emf risks extremely difficult and susceptible to inaccurate, if not sensationalist,9 stories in the public media. For example, a recent article in Time stated that:10 Strung along high towers, ["high-tension" electric transmission] lines carry large amounts of electricity over long distances. Homes, schools, and playgrounds should not be built anywhere near them. ,(--- Another article in Popular Science warned:11 y If you are house hunting stay away from homes near a power line right-of-way. Check out the nearby 1k school's location as well. If your local utility is planning to build high voltage transmission lines, ask your county or state board of health to investigate risks. Such stories may lead to individual and collective actions that are costly and, worse —if something other than emfs prove to be the cause of increased childhood cancers, may prove ineffective. For example, in the U.S., a roximately 10 million acres of land and 1 million lase eneu to ower Ines to we emf exposures above leve s • ust-homes f public fears were to result in only 1% decline in the market value of these properties, this would amount to approximately $1 billion i property value.l2 _.- _______-_--.----_. — EXHIBIT Background y (rD.G U.S. Power Distribution USR- /to http://www.piercelaw.edu/riskNol5/winter/Abt.htm 1/14/2008 H CO X -""):::::, \.)°}4\ • <2-73 . : es 0. , ..; _ .. s... -11 4 ,,, L.-� r Yr��1�_ l . r• .k" . . ,. �pa� r. ,•...z. . 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Viii VIA • ♦ r- • Coping with the Risk of Cancer Near Power Lines rage 2 of is • • Utilities provide power to businesses and homes via 60 hertz(Hz) alternating current. Electricity is generated by large power plants at about 20 kilovolts (kV), and step-up transformers increase the voltage • to about 765 kV to increase long-distance transmission efficiency. Voltage is decreased at substation step-down transformers and delivered through primary distribution lines, carrying voltages, from 5 to 35 kV, to distribution step-down transformers. These transformers reduce the voltage to the level needed by businesses and homes (usually 115 volts). Magnetic fields created by electric current are greatest at step- down transformers. Secondary distribution lines then carry this power to residences.13 The U.S. has about 350,000 miles of transmission lines and two million miles of distribution lines.14 Because of the ubiquity of power lines, one-third of children in the U.S. live in homes associated with high current configuration power lines.15 Epidemiological Studies As mentioned earlier, the initial evidence of a link between emfs and cancer was provided by Wertheimer and Leeper.16 They conducted a case-control study in Denver, Colorado that examined the relationship between cancer mortality in 344 children under 19 years of age and exposure to magnetic fields at the time of their birth and death. Current flow, based on the size of wiring and distance of homes from substations or transformers, was used as a proxy for magnetic field exposure. Exposure was divided into high and low current configurations. Using a control group of the same size, a two to threefold increase in risk of cancer was found among children living in high current configuration homes. This study was controversial because the exposure assessment included only outside wiring, not other sources of magnetic fields. Also, investigators who performed the wire coding were not blinded.l7 This • led to attempts to duplicate their results and improve exposure assessments. In a later study, also conducted in Denver, Savitz compared 356 children with cancer to 282 controls recruited through random digit dialing. Exposure was determined both from the wire configuration classifications used earlier and actual short-term emf measurements made inside homes. The study found an association between high current configuration homes and an approximately twofold increase in cancer, but no association was found between emf measurements and cancer.18 A third case-control study was conducted by London et al. in Los Angeles County, California. Using two groups of 232 children under ten years of age, the association between emf exposures and leukemia was examined. Exposure was evaluated by the Wertheimer and Leeper classifications; spot measurements at locations inside and outside homes and measurement in each child's bedroom. Also, data was collected concerning use of electrical appliances in the homes. Many potentially confounding factors were controlled. Once again, high current configuration homes were associated with a twofold increase in leukemia, but no association was found with measured emfs.19 A fourth study avoided many problems in earlier studies. It examined all children who had lived within 300 meters of any 220 and 400 kV power line in Sweden between 1960 to 1985. This yielded a study population, including adults, of 500,000 individuals. Exposure was assessed with spot and 24 hour measurements in homes. Long term exposure was also calculated, accounting for distance, line configuration and load, with historical loads being obtained from records by station managers. This study associated historical field measurements with a fourfold increase in leukemia, with the association being proportional to calculated field strength.20 However, once more, no association was observed between actual field measurements and cancer. The last three studies, because of failure to find any correlation between cancer and measured emfs, http://www.piercelaw.edu/risk/Vol5/winter/Abt.htm 1/14/2008 Coping with the Risk of Cancer Near Power Lines Page 3 of 8 • • leave question about the risk of cancer from power lines. None eliminate the possibility that field strength is a surrogate for another risk factor. Moreover, the Savitz and London studies have been • criticized for possible selection bias because they obtained controls through random digit dialing. This would reduce participation by those difficult to recruit by phone.21 Such questions have sparked investigators to turn in vitro and animal studies in an attempt to discern a possible mechanism for emfs' causing cancer. In Vitro and Animal Studies In vitro studies have shown that emfs affect cell membranes but appear incapable of damaging DNA. From the latter, it seems that emfs cannot directly cause cancer.22 However, there is a possibility that such forces might play an indirect role. For example, one investigator has suggested that low frequency emfs may enhance the ability of a tumor promoter to impair cell to cell communication.23 Most lifetime animal carcinogenicity studies have been conducted at much higher emf strength levels than those received by humans.24 However, one has found that rats exposed to 60 Hz emfs had decreased secretion of melatonin.25 That hormone may retard cancer growth of cells, but this has apparently not been established.26 In another recent study, a tumor initiator was applied to the skins of mice; then weekly applications of a tumor promoter were made. Half of the mice were exposed to 60 Hz emfs; the others were not. Mice exposed to emfs were found to have an increased rate of tumor development. However, no difference between the groups were found in the number of short or long term tumors formed.27 So, the uncertainty continues. • Summary The most convincing evidence for an association between exposure to emfs from power lines and cancer comes from epidemiological studies. However, some scientists find this association implausible because, e.g.,the strengths of these fields are negligible compared to those produced endogenously by cells28 and exposures are usually lower than those encountered with household appliances.29 Despite uncertainties, epidemiological studies nevertheless suggest that risk of excess cancer deaths associated with living near distribution lines producing stronger than average magnetic fields may be about 5 per 100,000 children per year.30 This is comparable to the risk of childhood leukemia from in utero exposure to diagnostic x-rays, as well as more speculative risks of childhood cancer associated with not breast feeding or with smoking during the first trimester. Still, if these risks are real, they would cause approximately 100 to 1000 deaths annually.31 Risk Management Options Given considerable uncertainty about the link between emfs and cancer in children, risk managers have several options. One is to do nothing. This seems to be supported by those who do not believe emf exposures present a credible health risk.32 As noted earlier, the CIRRPC, a panel of prominent scientists, has concluded that the scientific evidence of extremely low frequency emf exposures • presenting a hazard is inadequate to warrant increased research.33 Yet, because of ubiquitous exposure to emfs, the topic must be fully investigated. If no action is taken, http://www.piercelaw.edu/risk/Vo15/winter/Abt.htm 1/14/2008 Coping with the Risk of Cancer Near Power Lines Page 4 of 8 • • public fear will continue to thwart construction of power lines, lower already declining property values near transmission lines, promote further court battles and pressure utilities to alter the design of power • lines --all with major costs.34 Moreover, the need for more research is widely supported by many policy makers and scientists. More in vitro studies are needed to better understand the field strengths required to produce cell changes, more chronic animal studies are needed at exposures comparable to those of humans living near power lines, and further epidemiological studies with better measures of exposure should be conducted.35 Also, prospective studies need to be undertaken to better control bias and confounding variables. While no single study can establish causation, several carefully designed epidemiological studies, all associating emf exposure with cancer, coupled with supporting animal and in vitro studies can do so.36 There seems to be enough concern to warrant further research, if not more aggressive action. Moreover, whatever the cause, a two to fourfold increase in cancer among certain children37 would seem to warrant continued if not increased research. Measures might also be undertaken to reduce emf exposures. These include establishing field strength standards on power lines as in New York and Florida,38 burying power lines and arranging lines to maximize cancellation of generated magnetic fields. However, some have costs exceeding any that could be easily justified in light of current scientific evidence. This raises the possibility of taking only measures with costs that are comparatively low compared to apparently low credibility of risks.39 Such "prudent avoidance" might involve, e.g., not walking under power lines or purchasing a house located near a transformer. The problem, of course, is attempting to determine what is "prudent" under the circumstances. Also, would "prudent" measures voluntarily undertaken by utilities help allay public anxieties and build credibility or would they be construed as • acknowledging an emf hazard and engender even greater public apprehension? Given the uncertainties, management of cancer risks from power lines has proven extremely difficult. Federal agencies have been unable to reach consensus. The U.S. Environmental Protection Agency (EPA), possibly the most likely candidate for taking regulatory action, had a research program on the effects of emfs in the early 1980's, but its funds were cut by the Reagan administration.40 In a 1990 draft report, EPA recognized the correlation between proximity to power lines and cancer but did not find that overall evidence warranted classifying emfs as carcinogenic.41 In 1991, it published another draft report,42 indicating that further research was needed. It has still taken no regulatory action, but it is expected to issue a report examining more current research this year. Meanwhile, as noted above, public anxiety leads to various actions. Utilities are changing the design of distribution circuits in residential areas and are placing more lines underground, on higher poles or in more compact configurations.43 Field strength standards for power lines have been established in two states.44 Alexandria, Virginia and other municipalities are burying power lines.45 Such measures are estimated to cost more than $1 billion per year.46 Public fears have also led to litigation and verdicts against utilities -- some to recover for losses in property value caused by fear, regardless of whether those fears are well grounded according to current scientific understanding.47 The Need for Better Public Communication Informing the public about emf risks does not seem to be an option as much as a necessity. People • appear to be concerned more about what they do not than what they do understand.48 Yet, risk communication concerning emfs is difficult. The topic is emotionally charged: Children appear to be most at risk, and emf exposures are largely involuntary and unavoidable. Communication is also http://www.piercelaw.edu/riskNol5/winter/Abt.htm 1/14/2008 Coping with the Risk of Cancer Near Power Lines rage D or a • • difficult because average citizens understand little about electricity or magnetism. • Perhaps some of the anxiety that, in and of itself, causes problems would be lower if risks from emf exposure were put in the context of known, preventable risks of equal or greater magnitude --including childhood deaths from poisons and bicycle accidents.49 If nothing else, the public might be better informed about sure risks that can be easily addressed. Some such measures are now underway. The EPA Office of Radiation and Indoor Air is publishing documents for the public. One, "EMFs in Your Environment: Magnetic Field Measurements of Everyday Application," provides general information. Another, "Questions and Answers on EMFs," addresses common concerns. Moreover, many electric utilities are distributing literature and answering questions. Some utilities will also measure magnetic fields in concerned customers' homes; if emfs are found to be high, ways are suggested for reducing them. Summary and Conclusions Epidemiological studies show a two to fourfold increased risk of cancer in children living near certain electric power lines. However, because none show such a correlation with measured field strength, and in vitro and animal studies have failed to show a mechanism by which emfs can induce cancer, considerable uncertainty remains about what should be done. While one analysis of the literature suggests that the evidence of an emf link with childhood cancer is • too weak to warrant an increase in research expenditures, research should at least continue and possibly be expanded. Although the relative risks are small and, to date, uncertain, the stakes are large. Hundreds, if not thousands, of children are potentially affected, and the costs of cautionary measures can be very high. For maximum credibility, federally sponsored research should be managed by agencies, such as the EPA or National Institutes of Health, that are neutral toward the issue, rather than DOE that may be seen as being advantaged or disadvantaged, depending on research results. Finally, neutral bodies with the necessary expertise should give full attention to communicating accurate and current information about links between emfs and cancer to the public. If people had a better understanding of why many experts believe fears to be wholly unwarranted,this might help allay anxieties that, in and of themselves, are proving to have costs. In any case, as much information as possible is needed to inform actions now being undertaken by individual citizens, state and local governments, and utilities. Notes * Ms. Abt received her B.A. (Biology)from Brandeis University and M.S. (Environmental Health) from the Harvard School of Public Health. She is an Associate with Clement International, in Fairfax, VA. 1 Nancy Wertheimer& Ed Leeper, Electrical Wiring Configurations and Childhood Cancer, 109 Am. J. Epidemiol. 273 (1979). 2 Currents of Death (1989)and Calamity on Meadow Street,New Yorker, July 9, 1990, at 38. • 3 Others considered here are David Savitz, Case-Control Study of Childhood Cancer and Exposure to 60-Hz Magnetic Fields, 128 Am. J. Epidemiol. 21 (1988); Stephanie London et al., Exposure to http://www.piercelaw.edu/risk/Vo15/winter/Abt.htm 1/14/2008 Coping with the Risk of Cancer Near Power Lines rage o or a • S Residential Electric and Magnetic Fields and Risk of Childhood Leukemia, 134 Am. J. Epidemiol. 923 (1991) and Maria Feychting& Anders Ahlbom, Magnetic Fields and Cancer in People Residing Near • Swedish High Voltage Power Lines, Inst. Miljomedicin, Karolinska Institutet, 2-10 (1992). 4 U.S Environmental Protection Agency, Evaluation of the Potential Carcinogenicity of Electromagnetic Fields 1-3 (1990). 5 Health Effects of Low-Frequency Electric and Magnetic Fields, 27 Envtl. Sci.& Tech. 51 (1993). 6 Id. 7 Keith Florig. Containing the Costs of the EMF Problem, 257 Science 468, 488 (1992). 8 Id. 9 Supra note 2. See also, Harold R. Piety, What We Don't Know About EMF, Public Utilities Fortnightly, Nov. 15, 1989, at 15. 10 Phillip Elmer-Dewitt, Mystery --and Maybe Danger--in the Air, Time, Dec. 24, 1990, at 67, 69. 11 Ann Marie Cunningham, Electromagnetic Fields: In Search of the Truth,Popular Science, Dec. 1991, at 90. 12 Florig, supra note 7, at 469. • 13 Gordon L. Hester, Electric and Magnetic Fields, Managing an Uncertain Risk, Environment, Jan./Feb. 1992, at. 9. 14 Indira Nair, M. Granger Morgan & Keith Florig, Biological Effects of Power Frequency Electric and Magnetic Fields 4(1989)(report for the Office of Technology Assessment). 15 EPA, supra note 4. 16 Supra note 1. 17 Id. 18 Savitz, supra note 3. 19 London et al., supra note 3. 20 Feychting & Ahlbom, supra note 3. 21 Committee on Interagency Radiation Research and Policy Coordination, Health Effects of Low- Frequency Electric and Magnetic Fields V-9 (1992). • 22 EPA, supra note 4, at 1-6. 23 W. Ross Adey, Nonlinear Electrodynamics in Cell Membrane Transductive Coupling, in Membrane Transport and Information Storage 1, 21 (1990). http://www.piercelaw.edu/risk/Vol5/winter/Abt.htm 1/14/2008 Coping with the Risk of Cancer Near Power Lines Page 7 of 8 • • 24 EPA, supra note 4, at 1-4. • 25 B. W. Wilson et al., 60-Hz Electric Field Effects on Pineal Melatonin Rhythms: Time Course for Onset and Recovery, 7 Bioelectromagnetics 239 (1986). 26 See, e.g., Kenneth R. Foster, Weak Magnetic Fields: A Cancer Connection? in Phantom Risk: Scientific Inference and the Law 47, 76 (K.R. Foster, David E. Bernstein & Peter W. Huber eds. 1993 (critical of the study). 27 M. A. Stuchly et al., Modification of Tumor Promotion in the Mouse Skin by Exposure to an Alternating Magnetic Field, 65 Cancer Ltrs. 1 (1992). 28 Florig, supra note 7, at 468. 29 Foster, supra note 26, at 48-9. 30 Florig, supra note 7, at 469. 31 Id. 32 See, e.g., Foster, supra note 26, at 48: "[T]he case for the hazard is very weak, and I doubt whether any exists at all." 33 Supra note 21. • 34 Florig, supra note 7, at 488. 35 CIRRPC, supra note 21, at V-17; 36 Nair, Morgan & Florig, supra note 14, at 66. 37 See supra, Epidemiological Studies. See also, supra at notes 30 and 31. 38 David L. Chandler, Study Finds Power Line Tie to Leukemia, Boston Globe, Nov. 12, 1992, at 1. 39 Exploring the Options for Magnetic Field Management, EPRI Journal, Oct./Nov. 1990, at 5, 8. 40 Graeme Browning, High-Voltage Debate, National Journal, Aug. 17, 1991, at 2027. 41 Supra note 4. 42 Review Draft -- A Research Strategy for Electric and Magnetic Fields: Research Needs and Priorities. 43 Florig, supra note 7, at 469. • 44 See supra, at note 38. 45 Browning, supra note 40. http://www.piercelaw.edu/risk/Vol5/winter/Abt.htm 1/14/2008 Coping with the Risk of Cancer Near Power Lines Pages of 8 • 46 Florig, supra note 7, at 488. • 47 See, e.g., The Legal Perspective [On Phantom (Or Not So Phantom) Risks] in Phantom Risk, supra note 26, at 137, 143. 48 But see, Brandon B. Johnson, Advancing Knowledge's Role in Lay Risk Perception, 4 Risk 189 (1993). 49 Dolores Kong, Scientists Warn Against Panic Over Electromagnetic Field Effects, The Boston Globe, Nov. 13, 1992. 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