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Mintues - 04/08/1991 Workshop "'"..."'"- COUNCIL WORKSHOP MINUTES April 8, 1991 TAPE READING 0001 DATE. COUNCIL CHAMBERS, CITY HALL, CITY OF WOODBURN, COUNTY OF MARION, STATE OF OREGON, April 8,1991. 0003 CONVENED. A workshop was held at 5:30 p.m. with Mayor Kyser presiding. 0005 ROLL CALL. Mayor Councilor Councilor Councilor Councilor Councilor Councilor Kyser Figley Galvin Hagenauer Jennings Sifuentez Steen Present Present (5:50 pm) Present Present Absent Present (6:00 pm) Present (6:28 pm) 0010 STATUS REVIEW OF WASTEWATER FACILITIES PLAN. In attendance at the workshop were City Public Works staff members from the Engineering division and Wastewater division, representatives from CH2M Hill and Wastewater Network. Public Works Director Tiwari provided the Council with an overview of the Facilities Planning process along with a review of previous workshop discussions pertaining to discharging of effluent into the Pudding or Willamette rivers. He briefly reviewed population and industrial growth factors projected through the year 2020. 0609 Daria Wightman, CH2M Hill project manager, reviewed the effect of Total Maximum Daily Load (TMDL) standards once they are adopted by the Department of Environmental Quality. It is anticipated that the TMDL standards will be available by August 1, 1991. The Wastewater Facilities Planning process must include an informational public meeting to discuss options available to the City to meet state and federal water quality standards. The informational meeting has been scheduled for May 6, 1991, at 7:00 p.m.. Options available to the City include the following: 1) Expansion and/or upgrade of the current wastewater plant to meet the TMDL standards; 2) Irrigation of effluent in a wetlands area; 3) Separation of industrial wasteloads; 4) Construction of a new facility to discharge into Mill Creek following secondary treatment; and 5) storage of effluent. She also provided the Council with a draft copy of a fact sheet which would be available to the public prior to the informational meeting. Page 1 - Council Workshop Minutes, April 8, 1991 III -" COUNCIL WORKSHOP MINUTES April 8, 1991 TAPE READING Discussion was held regarding the financial aspects of the future improvements. She stated that the second stage of the facilities plan will include a financial plan for Council consideration. Costs indicated within the fact sheet represent estimated figures which include construction and operations through the year 2020. 2220 Public Works Director Tiwari briefly recapped the information provided during the workshop and reminded the Council that the informational meeting has been advertised for May 6, 1991, 7:00 p.m., in the Council Chambers. 2250 ADJOURNMENT. The workshop was adjourned at 6:48 p.m.. APPROVED Y. W Fred W. Kyser, Mayo ATTEST /7~7~....:f Mary T nant, Deputy Recorder City of Woodburn, Oregon Page 2 - Council Workshop Minutes, April 8, 1991 '"11' PLANNING FOR WOODBURN'S WASTEWATER TREATMENT FACILITIES /1 I~(~}\ \,/ ; , ;.)OY ~; ;;,-/ ,~ S : 3 0 f ^, \ ~- . Apri11991 INTRODUCflON The City of Woodburn is preparing a facility. plan for the Woodburn Wastewater Treatment Plant. The facility plan Will identity how the existing sy:stem can be uJ?graded and expanded to meet future requirements. The rlan ado~tion by the aty is intended to guide the improvements and operation 0 the city s " wastewater treatment system tfuough the year 2020. Improvements to the city's system are needed to meet new water quality regulations established by the u.s. Environmental Protection Agency (EPA) and the Oregon Department of Environmental Quality (DEQ). These regulations designate wastewater treatment and discharge standards that mustoe met to protect the Pudding River and other bodies of water that receive treated wastewater. .The city's current system is not able to meet these stringent new standards. In addition to upgrading the existing system to meet regulatory requirements, the facility plan Will provide for increasing the system's capacity in order to accommodate planned growth in the city. Preparing now lor both of these purposes is an efficient and cost-effective planning approach. Additional efficiency is built into the plan by providing for phasea construction of the improvements. The plan will enaole the city to rook ahead to long-term needs through the year 2020, while implementing the improvements only as they are needed. Upgrading the city's system will have other advantages as well. New technology and miti~ation measures will result in reduced odor and noise impacts in the plant vicmity. And, as discussed under "Preferred Options" (below), benefits may include enhanced wetlands, open space, and recreational opportunities. THE STUDY PROCESS AND SCHEDULE The Cio/ of Woodburn has hired CH2M Hill, an engineering and environmental consulting firm, to help prepare the facility plan. The planning process has the following basic steps: . Define future wastewater treatment needs, based on population and wastewater projections and on regulatory requirements Identify alternative treatment systems that can meet these needs Evaluate the alternatives on the basis of cost, environmental impacts, ability to construct and operate, and other advantages/disadvantages. Select the best treatment system for more detailed analysis, and develop a facility plan . . . ,,, ,..--- The plann?'g process ~s curr~ntly in. the ~d step: evaluation of the alternatives. An essential part of this step IS public reView and comment on the alternatives. This fact sheet is designed to aid in that review. All public comments will be considered in selecting the alternative for further analysis. It is anticipated that the draft facility plan will be available for public review toward the end of 1991. Construction of the improvements may begin in 1994. The first phase may be in operation by 1996. PREFERRED OPTIONS A number of alternatives have been developed and examined. As a resliIt of this evaluation, two alternatives appear to be most advantageous and are described below as "preferred options." The alternatives that do not appear to be as promising are briefly described under "Other Options ConsIdered." All of these alternatives are open to public review and comment. Option 1: Co-location of New Facility with Existing Facility . The existing treatment plant will continue to be used, up to its full capacity. The secondary treatment process will remain the same as at present. The tertiary (advanced) treatment system will be upgraded by replacing the filter system in order to meet regulatory requirements for discharge to the Pudding River. A new treatment plant will be built next to the existing plant. All industrial wastewater will be treated at this plant, as well as domestic wastewater loads that exceed the capacity of the existing plant. The new facility will have an upgraded secondary treatment process. Following secondary treatment, the effluent may be discharged to the Pudding River if it meets regulatory requirements (which have not yet been exactly defined). Another possibility is for the effluent to be piped to an area north of the plant to create a new wetlands area. The wetlands will essentially provide tertiary treatment to the effluent. The wetlands will discharge into Mill Creek north of the city's urban growth boundary. It may also be possible to use some of the wetlands discharge for golf course irrigation. . The creation of new wetlands can provide numerous benefits, including enhanced habitat for wildlife, bird sanctuaries, recreational opportunities ~uch as birding ~d hiking, open spaces, educational opportunities, and mcreased aesthetic appea[ The cost of this option is estimated at from $22 to $35 million, depending on the amount of industrial flow that is treated. As a point of comp-arison, the City of McMinnville is improving its facilities at a cost of $27 million, and sewer rates are expected to increase by about$20-2S/month. Option 2: Continued Use of Existing Facility, with New Facility Located Southeast of Existing Plant . This option is essentially the same as Option I, with the following differences: 2 - ... ~ -', ~-" ~ Q f " ;;;0-- \ \ '- \ " " '- \ ,/ '- r--/ J '-- --- ~ \ tf ffi\ / 'IT - PERMIT CONDmON SCHEDULE C Unless otherwise modified by the Environmental Quality Commission upon establishment of final waste load allocations and total mass discharge loads for the Pudding River: . Submit draft facilities plan within 90 days after the city's waste load allocation is established ... Earliest estimated date of establishment: August 1991 Earliest estimated date for submittal of draft: November 1991 . Start construction within 29 months after the city's waste load allocation is established ... Earliest estimated date of start of construction is January 1994 . Complete construction and attain full compliance ... within 50 months after the city's wasteload allocation is established ... Earliest estimated date to complete construction is January 1996 .. POPULATION 20,000 15,000 10,000 5,000 __e-e Actual population e--- e --- e Projected Population Figure 1 POPULATION PROJECTIONS (Through the Year 2008) 13,228 __ . -- " " " " " " . ll,lY ___e e / e/e 00 1965 -, 17.996 ... .. .. .. .. . .. " .. 16,023/, __e" -- .- Jt_ 90 08 80 85 70 75 28 95 2000 05 Table 3 Estimated 1986 and Projected 1991 to 2006 Populations of the City of Woodburn, Oregon ] 980 Census ]986 Estimate J 99] Projection Age Males Females Total Males Females Total Males Females Total 0-4 466 461 927 363 349 7]2 445 428 874 5-9 401 392 793 501 495 996 4]2 397 809 10-14 372 389 761 445 434 879 563 553 J,] 16 15-19 361 397 758 420 438 858 513 503 1,016 20-24 407 386 793 420 468 888 504 538 J,041 25-29 380 382 762 482 459 941 527 572 1,099 30-34 306 323 629 452 431 883 584 527 J,lJl 35-39 238 234 472 336 353 688 495 472 967 40-44 ]93 191 384 253 247 500 359 3'15 734 45-49 ]48 166 314 202 201 403 267 263 530 50-54 152 ]95 347 150 173 323 209 216 425 55-59 205 240 445 156 204 360 161 193 353 60-64 258 349 607 200 243 442 160 219 379 65-69 314 471 785 231 342 573 201 260 461 70-74 388 500 888 266 433 700 211 333 544 75 .. -ill -.ill 1,531 ~ 1,002 ].644 -.ill 1,]59 1.768 Totals 5.227 5,969 ]] ,J 96 5,518 6,272 1 J,791 6,220 7,008 13,228 ] 996 Projection 200] Projection 2006 Projection Age Males Females Total Males Females Total Males Females Total 0-4 526 506 ],03] 592 570 ],162 637 614 ],251 5-9 488 469 957 568 546 l,lJ4 634 610 1,244 10-] 4 466 447 913 541 519 1,060 621 596 1,217 15-19 620 612 1,232 523 506 1,029 598 578 1,176 20-24 583 588 1.171 690 697 1,387 594 591 1,185 25-29 594 627 1,220 673 676 1,349 778 '185 1,563 30-34 613 630 ],243 679 684 1.364 '158 '134 ],492 35-39 619 563 ].181 648 664 ].:;]2 713 719 ],432 40-44 5]2 490 ].003 635 580 ].2] 5 664 681 ],345 45-49 368 387 756 519 SOl 1.021 640 590 1.230 5!1-54 270 274 544 369 396 765 515 508 1,024 5S-S9 214 231 446 273 288 560 366 406 713 60-64 163 204 367 212 241 454 266 296 562 6S-69 163 234 397 16S 220 385 210 255 465 70-74 180 249 429 149 226 375 151 213 364 75 .. ~ 1,118 1.642 ~ ].018 ],472 390 930 1.320 Totals 6,903 7.628 14,532 7.690 8.333 16,023 8,536 1,107 17 ,643 2006 \~O)\ ,- \l,b4-~ 1~ '2.."2..8 I \5" 4, tlb- 26 4 4-\tJ 't100 -- \ 3:> "2. 2. c.c:. I erl" ~'3'3~'%~ \5'jY.s . 2.2'?l % c:-r '"Il' - '"'- I <? ZS, --- 'Wd~te.. Wa.te:< C \ P C 1-\2. M HI L L "R,E.(->oR ~ b~ : Gt RO\f E R- JOY\.:) ~ ~ Re=.. POPULATION PROJECTIONS Population projections were made on the basis of discussions with City Planning and Public Works staff. Historical data on population growth over the last 10 years and population projections developed for the City's 1976 wastewater facili- ties plan were taken into account. Population was projected for the next 40 years, to 2026, at an annual population growth rate of 3.4 percent to determine wastewater loadings for this period. This projected growth rate is somewhat higher than the 2.3 percent average annual growth during the last 10 years, but it is used to reflect an anticipated higher rate of growth of light industry and development in the City. Table 2 presents both population and wastewater flow projections. .1 ''l! l , " ,. 'IF J -..J i t....--.... MEMO TO: . The City. Council through the City Administrator FRbM: ..P~bIiCWorkSOirector..~.... ~'_ SUBJECT: Planning for Industrial Wastewater Flows DATE: February 6, 1991 For initial analysis of wastewater facilities planning. the population growth and the industrial growth factors need to be established. The final decision on this topic will be made by the council in the near Mure. However. we have made certain projections at this stage so that initial cost comparison work could be started. These projections are shown on the attached sheet. Please note that the population increase projection of 3.4 percent used in prior CIP calculations is proposed to be used this time also. However. the industrial flow increase has been placed from an average of 0.65 million gallons a day (mgd) to 1.3 mgd in 1995. and then a normal increase of 5 percent is planned to be used. I will be available to answer any questions relating to this subject. The topic of discussion in the next workshop, that will be planned with the council's consent, will include this subject along with others. ..... , FT:Ig Attachment: Table of Population Projection cc: Planning Commission Chamber of Commerce Wastewater Plant Rle ~- '- 7 n_ _~C02/06/91 13:31 CH2M HILL If!j U '-!..ol.i. t) t) 'i 'B'503 295 4446 /:... FIGURE F3.2 . CITY OF WOODBURN WINTER POPULATION PROJECTIONS 1990 - 2020 . .. e._.. _.. ~~1J:".'~~ 2.STT 525 2,665 525 2.765 525 2.849 3.046 3.150 3,257 . : :::::~...' 26.60Q 26,428 27.284 -.. ~ ::;.:;:-.(1: i..:::~t ~ 52S 177. 525 177 625 177 525 ::.;..~: ~ 5,029 625 5,200 525 5.876 R5 625 ~ ;"':F:-i i. . ~.;tn~!":: ".,:;.~.tWO':--~. :., :~_:~"\'):S-.:IG.~~~ 'iI47~fl:'~ - 'R' ,,2106/91 '5'503 295 4446 13:30 CH2M HILL . . AGURE F3.2 .: . CrTYOFWOODBURN SUMMER POPUu\TION PROJECTIONS '990 - 2020 .. '.4~\~ 1,503 .). 1,554)~ 2.577 ) ~ 525 130 854 .coo 2,665 ... 525 180 354 400 1. 2.755 ~ 130 854 400 1.837 525 130 400 354 <fOO 354 ' <fOO 854 ' 0400 2006 24,000 2007 24,818 2008 26.659 mos 26.531 8,880 .~::'2D10~'" :=:.,~f;,; ,c;t~ 2011 28,865 4,255 2012 29.329 4.399 2013 30.326 4.549 2014 31 3S7 ",704 tiff,i': ~f~42.a,];,,:: tf.;;~"'".. 2016 38.525 5.~ 2017 34,664 5.200 2018 35,842 6.376 2018 87 080 ..' .~..~. ~Ill' . ,,, -c ...-..... 0-.'" ~. f "'., l4J 002/0 ~ 154. ~ -- /06/91 13:32 fi'503 295 4446 CH2M HILL l4J 00 /!JA TABLEF3.3 CITY OF WOODBURN FACIUlY PLAN DOMESTIC/INDUSTRIAL WASTEWATER FLOWS " ,. ~l'.t it.", :'~l- r.;~ ~':.' -.: -... .; ~..."\::'. ~".... " -