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178561 178561 Original to City Clerk CITY OF ST. PAUL F°ENT NO. OFFICE OF THE CITY CLERK 3, Pilo COE TION—GENERAL FORM B .t �+ 4. PRESENTED BY + T gi3n COMMISSIONER DATE -T RESOLVED, That the Council of the City of Saint Paul, upon due consideration of the report thereon by the Chief Engineer of Minneapolis-Saint Paul Sanitary District and the Resolution of the Board of Trustees of said District recommending and approving the institution and conduct of the proposed Program of. Research and Investigation in behalf of said District, calculated to assist said District in its determination of future requirements of said District' s Sewage Works, both submitted to said Council under date of May 15, 1956, that said proposed Program of Research and Investigation and the institution and conduct of the same in behalf of said District be and the same hereby are, in all things, approved. JUN 2 8 1956 COUNCILMEN Adopted by the Council 41V401195— Yeas Nays DeCourcy 12 8195E Holland Approved 195_ Marzitelli /`� Mortinson Tn Favor _ Peterson J Mayor Rosen Against Mr.President, Dillon 6M 6-06 01619.2 e - - y Y� PUBLISHED L!L!Y�/ - y • - May 24, 1956 Honorable Mayor and Members of the City Council City of St. Paul, Minnesota Gentlemen: Under date of May 15, 1956 the Board of Trustees of the Minneapolis- St. Paul Sanitary District submitted to the City Council a report of their chief engineer and a resolution adopted by the Board of Trustees recommending and approving the institution of a program of research and investigation to assist in the determination of future requirements of the Sanitary District's sewage works. This report and resolution was forwarded by the Council to the Technical Committee for study and recom- mendation. The Technical Committee has considered this matter; and in view of the many problems which will be involved in the expansion of the Sanitary District plant to meet the needs of the metropolitan community, the committee recommends to the Council its approval of this program of research and investigation. Respectfully submitted, TECHNICAL COMMITTEE CO o L- M. Shepard ting airman i Engineer G°ew Edwin F. Jone Secretary Utilities Engineer EFJ:ew t MINNEAPOLIS-SAINT PAUL SANITARY DISTRICT To the Board of Trustees Presented May 14, 1956 Gentlemen: Program of Research and Investigation To Assist In The Determination Of Future Requirements For Sanitary District Sewage Works. The present interceptor sewer system in the cities of Minneapolis and Saint Paul was designed in 1928-1934 for conditions expected in the year 1970, only fourteen years hence. Already there are indications that certain portions of this system are approaching the design loadings. The present Sanitary District sewage treatment plant was designed in 1928- 193 4 for conditions expected in the year 1945, already eleven years past. Since that time the plant has reached its design loading, but only the sludge disposal facilities have been enlarged, 33 per cent in 1950-51. The strength of the plant effluent to the river, in terms of population equivalent, has increased by 396,000 from 1939 through 1955, or 62. 5%, and is now in excess of a million people. The expected population growth in the Metropolitan Area during the decade 19554965 is over 200, 000(1), an undetermined portion of which will be con- nected to this plant. In twenty-five years the Metropolitan Area population is expected to almost double, barring a complete reversal of trends(2). At present the outside area population connected to this plant is only about ten per cent of the total connected population. From the above information it becomes apparent that a study of possible future requirements for Sanitary District sewage works should be undertaken. Nearly thirty years ago, in 1927, the Metropolitan Drainage Commission began its studies of the sewage disposal problems for this area. Those studies extended over a period of six years and cost approximately $250, 000, but they pointed the way to savings of approximately $5,000, 000 in the construction of the pres- ent works. Built during the last depression, and with a PWA grant of about 27%, the present works cost approximately $15, 800,000 less the grant, or a net cost to the cities of approximately $11, 500, 000. This was a real bargain, compared with an estimated present replacement cost of $53, 500,000(3) for the same works. With present day high construction costs, careful preliminary studies become even more advisable, if time is available, before undertaking the construction of secondary treatment facilities which might cost $10 to $15 million, exclusive of any enlargement of the interceptor sewers. t Research and Investigation Program -2- May 14, 1956 It appears that the cities will be faced with the necessity of increasing the capacity of the present sewage works some 5 to 15 years in the future at a cost level which may be five or more times the original cost. It is proposed and recommended that a five-year program of research and investigation be undertaken by the Sanitary District, beginning this year, and aimed at secur- ing the most economical and satisfactory solution to the future sewage disposal problem in the Metropolitan Area. Authority for conducting such an investigation is contained in Section 445. 11 of the Sanitary District law, paragraph 1, which reads as follows: "Before undertaking the construction or operation of any system of sewage disposal for the district including intercepting sewers, pumping stations, treatment works, and appurtenances, it shall be the duty of the board of trustees of such sanitary district to adopt a comprehensive plan and program of procedure and work, for the collection, treatment, and disposal of sewage and waste mater- ials of the sanitary district, and the same may be modified from time to time with necessary maps, plats, surveys, and estimates of probable cost of such system for the entire district based upon the probable needs and requirements of the district and of any adjacent territory likely to be annexed to such district, down to such time in the future as to the trustees shall seem most efficient and economical as well as proper and reasonable. " While the connected population to this plant from the outside areas is now only about 10% of the total connected population, it is obvious that the outside areas are growing much faster than the Cities and that this percentage will increase considerably if the Cities continue to allow more outside areas to connect to their sewer systems. Other increases in this percentage will result as new industries locate therein or if industries now located in the Cities move or expand to the outside areas. The questions arise as to whether it is to the best interest of the Cities to continue the practice of permitting sewer connec- tions from outside areas, and if so, how can the costs be distributed fairly between the Cities and the outside areas. The proposed study should include a discussion of the engineering and economic factors pertinent to these ques- tions and an engineering analysis of the reasonable tributary areas to the Twin City Plant considering natural drainage and the availability and desirability of other locations for suburban effluent discharge. This would assist the Cities in reaching a decision whenever an outside area applies for connection and enable the District to intelligently plan plant expansions from time to time in accordance with a long-range plan. An outline of the proposed program is attached to this communication. It is a three-way program, i. e. , part of the work would be done by the Sanitary District staff, part by the University of Minnesota sanitary engineering depart- ment under Professor Geo. J. Schroepfer through research grants from the Research and Investigation Program -3- May 14, 1956 Sanitary District, and part by a firm of consulting engineers. The program is spread over five years to facilitate financing and to allow time for the collec- tion and analysis of engineering, laboratory and pilot plant data. The estimated cost of the research grants to the University for the five-year program would average $21, 000 per year. For the Sanitary District's part, it may prove advisable to add another engineer and another chemist to the staff. The consulting engineer work should probably be done on a cost-plus basis in a manner similar to that done for the Metropolitan Airports Commission. For the consulting engineer work, I would recommend either Greeley & Hansen of Chicago, Black & Veatch of Kansas City, or Toltz, King, Duvall, Anderson and Associates, Inc. of Saint Paul. The latter organization is the only local firm that I would recommend for this particular work. I believe they are competent to do this work and possess the added advantage of being thoroughly familiar with local conditions. Two of their principal engineers, A. J. Duvall and A. M. Steffes, were on the staff of the Metropolitan Drainage Commission or the Sani- tary District throughout the design and construction of the present sewage works. When it is considered that Professor Schroepfer, under whose direction the University's portion of the proposed work would be done, was Assistant Chief Engineer throughout the work of the Metropolitan Drainage Commission, and during the design and construction period for the Sanitary District, as well as being Chief Engineer during the first seven years of plant operation, the District would be indeed fortunate in again securing the services of so many of the same men who made such an outstanding record in the design and construction of the present works. Recommendation of this long-range program of research and investigation should not be interpreted as precluding the possibility that certain units of the plant such as the sludge disposal facilities may require expansion before the remainder of a long-range expansion is effected. The University's share of the proposed work for the balance of this year is estimated at $8, 800.00. I recommend that the District establish a research grant at the University for that amount for the year 1956, with the further understanding that the District will sponsor as a minimum that portion of the Univsrsity's share of the Research Program designated as Sections A-1, A-2, A-3, and A-5 of the attached Research Program, in a total amount of $17, 050.00 extending to September 15, 1957. 1 further recommend that the District enter into a cost-plus contract with Toltz, King, Duvall, Anderson and Associates, Inc. for the balance of the year 1956, and that I be authorized to inaugurate the attached program of research and investigation on behalf of the Sanitary District, the total expenditure on which for the balance of the year 1956 would not exceed $25, 000.00; and that I be further authorized to include the sum of $35, 000.00 in the budget for the year 1957 for the second year of the proposed five-year program. Respectfully submitted, K resin L. Mick Chief Engineer & Superintendent Research and Investigation Program -4- May 14, 1956 (1)City of Saint Paul Planning Board Publication No. 101, July 1955. (2) " II " " Newsletter No. 3, Vol. XI, March 5, 1956. (3)$15, 800, 000 x 3. 38 = $53, 500, 000. The factor 3. 38 is derived from the construction cost index as published by Engineering News-Record. This index was 676 in January 1956 and averaged only 200 during the construction period 1934 through 1937, a ratio of 676/200 or 3. 38. ( Engineering News- Record, September 29, 1955 and January 5, 1956. ) • • MINNEAPOLIS-SAINT PAUL SANITARY DISTRICT Program of Research and Investigation To Assist in the Determination of Future Requirements For Sanitary District Sewage Works I. THE RESEARCH PROGRAM A. The Mississippi River - The Mississippi River in the Twin City area is unique in that there is a practically uninterrupted record of river condi- tions for the 30-year period since 1926 covering a stretch of the river almost 100 miles in length.. This information should be invaluable in any calculations concerning future requirements for sewage treatment and studies of the usability of downstream river water for various purposes. Among the studies suggested are the following: 1. Determination of the deoxygenation and reaeration char- *(U) acteristics of the river at various points both before and after the operation of the present plant. 2. The frequency of occurrence of critical dissolved oxygen (U) values from actual records since the Minneapolis-Saint Paul Sanitary District and the South St. Paul plants were placed in operation. This study should be related to the various factors which influence stream pollution and re- covery so that an accurate appraisal of river conditions can be available. 3. A statistical study based on the above and a consideration (U) of the effect of river discharge frequency on the degree of treatment requirements for various rates of metropolitan area growth under differing influencing conditions. 4. A study of hourly variations in dissolved oxygen content of *(D) the Mississippi River at selected stations. This can be done by hand sampling but preferably by automatic and con- tinuous recording devices. 5. A statistical study of the bacteriological quality of the river (U) at the various sampling points above and below the Twin Cities plant. 6. A study of the nutrients in the plant effluent of both the Minne- apolis-Saint Paul and South St. Paul plants as well as in the Mississippi River related to the effect on algal conditions downstream. Research and Investigation Program - page 2 a. This would include the collection and analysis of data (0) on nitrogen and phosphorus composition of the river and various plant effluents over a period of time. b. The computation of a nitrogen and phosphorus balance (U) for the present plant. c. Recording of data on river algal conditions above and (U) below Minneapolis-Saint Paul and on the St. Croix River. This can be done in a preliminary way by the present samplers, but the study should include an investiga- tion by a competent biologist. B. Treatment Plant Investigations. 1. Pilot plant investigation of the activated sludge process and (U) its modifications to assist in determining: (D) (C) a. The economics of various modifications. b. The removal of nutrients by the various modifications. c. The possible effect of the nutrients on nuisance and dissolved oxygen conditions caused by algal growth and decay downstream. 2. Large scale pilot plant demonstration of the effectiveness (U) of a stabilization pond in the removal of BOD, suspended (D) solids and nutrients when treating a settled and chemically (C) treated effluent. After tests in a pilot plant, a larger scale unit should be constructed. A pond of an acre or more in extent in the Pigs Eye Lake area is envisioned. The data collected on this study could then be employed in an econ- omic comparison of this method along with the more con- ventional methods of sewage treatment. II. THE INVESTIGATION PROGRAM A number of avenues of investigation are suggested as being necessary and desirable when consideration is given to the fact that a construction program in the next 5 to 15 years costing over ten million dollars is a possibility. Research and Investigation Program - page 3 A. A Broad Plan for the Extension of the Intercepting Sewer System To Handle Outside Areas as it Affects the Sewer Systems of Minneapolis and Saint Paul and the Intercepting Sewer System of the Sanitary District. 1. A study of various methods of resolving the suburban growth problem including consideration of the following possibilities: a. Considering the existing intercepting system as suffi- *(C) cient to handle the Minneapolis-Saint Paul problem in the future with the suburban areas being supplied by a new system. b. Use of the present procedure wherein outside areas (C) are utilizing a portion of the capacity of the system provided for the Twin Cities. c. A study of various methods which embody the utilization (C) of both of the above procedures. This would appear to be the principal avenue of investigation. 2. An engineering analysis of the reasonable tributary area to the (C) Twin City plant considering natural drainage, availability and desirability of other alternatives for suburban effluent dis- charge. 3. A consideration of the advantages and disadvantages of a (D) Metropolitan District in solving the many problems associated with suburban growth especially as industries move to these areas. B. A Broad Plan for the Enlargement of the Present Sewage Treatment Facilities. 1. Based on the present treatment methods which include (C) sedimentation plus periodic chlorination, and chemical coagulation when necessary. This would involve an enlarge- ment of the existing works. 2. Based on secondary treatment by a number of methods. (C) These would include: a. Activated sludge and modifications thereof. 1. Standard activated sludge process. 2. High rate and modified processes. 3. Other new developments. b. The high rate trickling filter process in either single or double stage. Duplicate to P lmtcr '% CITY OF ST. PAUL COUNCIL NCIL NO OFFICE OF THE CITY CLERK COUNCIL RESOLUTION—GENERAL FORM PRESENTED BY COMMISSIONER DATF RESOLVED, That the Council of the City of Saint Paul, upon due consideration of the report thereon by the Chief Engineer of Minneapolis-Saint Paul Sanitary District and the Resolution of the Board of Trustees of said District recommending and approving the institution and conduct of the proposed Program of Research and Investigation in behalf of said District, calculated to assist said District in its determination of future requirements of said District's Sewage Works, both submitted to said Council under date of May 15, 1956, that said proposed Program of Research and Investigation and the institution and conduct of the same in behalf of said District be and the same hereby are, in all things, approved. JUN 2 8 1956 COUNCILMEN Adopted by the Council 195_ Yeas Nays DeCourcy G r w 2 8 1956 Holland Approved 195_ Marzitelli Mortinson In Favor Peterson Mayor Rosen Against Mr. President, Dillon 5M 6.56 2 RESOLUTION NO. 817 MINNEAPOLIS-SAINT PAUL SANITARY DISTRICT PRESENTED BY Peterson DATE May 14, 1956 RESOLD WHEREAS, The growth in population and industrial expansion of Minneapolis and Saint Paul and their outlying communities has resulted in a steady but ever- increasing demand upon the facilities of this Sanitary District's sewage treatment plant, and WHEREAS, Certain portions of the present sewage works have already reached or are approaching design loadings, it is apparent that sometime within the next five to fifteen years it will be necessary for the areas served to provide funds for plant expansion, and WHEREAS, In anticipation of the necessity of future plant expansion, this Board of Trustees has recently acquired certain lands to be devoted to that use, and WHEREAS, The Board has this day received a communication (Board File No. 5104) proposing a Program of Research and Investigation to Assist in the Deter- mination of Future Requirements of this Sanitary District's Sewage Works (Board File No. 5105), said program to be undertaken over a five-year period, beginning this year, and aimed at securing the most economical and satisfactory solution to the future sewage disposal problem in this metropolitan area, and WHEREAS, The general purpose and object of this Sanitary District is to pro- mote the public health and welfare by providing an adequate and efficient system and means of collecting, conveying, pumping, treatment and disposal of all domestic sewage, t- commercial and industrial wastes and their products within its own territory, and WHEREAS, Chapter 341. 11, Minnesota Session Laws of 1933, provides that before undertaking the construction or operation of any system of sewage disposal for the District including intercepting sewers, pumping stations, treatment works, and appurtenances, it shall be the duty of the Board of Trustees of such Sanitary District to adopt a comprehensive plan and program of procedure and work, for the collection, treatment, and disposal of sewage and waste materials of said Sanitary District, and the same may be modified from time to time, with necessary maps, plats, surveys, and estimates of probable cost of such system for the entire District based upon the probable needs and requirements of the District and of any adjacent territory likely TRUSTEES Yeas Nayes Adopted by the Board ' BASTIS DILLON HOYER In favor Chairman. NELSON PETERSON Against RYLANDER CHAIRMAN OLSON Corporate Secretary. P. - RESOLUTION NO. 817 Cont. MINNEAPOLIS-SAINT PAUL SANITARY DISTRICT PRESENTED BY TRUSTEF DATF 50 /- to be annexed to such District, down to such time in the future as to the Trustees shall seem most efficient and economical as well as proper and reasonable, NOW, THEREFORE, BE IT RESOLVED, That the Board concur in the recommendations contained in its Chief Engineer and Superintendent's communication (Board File No. 5104 ) and author- ize the inauguration of said Program of Research and Investigation (Board. File No 105) at a cost for the balance of the year 1956 not to exceed Twenty-five Thousand Dollars ($25,000), the cost for the year 1957 not to exceed Thirty-five Thousand Dollars ($35,000) which is to be included in the budget for that year, with costs for succeeding years to be determined annually and, subject to formal approval by this Board, in- cluded in the budgets for those subsequent years, and BE IT RESOLVED FURTHER, Inasmuch as this Program of Research and Investigation will eventually lead to, and become part of, a capital expansion of this District's sewage works, the cost of the study will become part of the resultant capital cost and shall be apportioned between the Cities and the outside areas now and/or hereafter connected to the sewer systems of the Cities in such fair and equitable manner as may be determined by the Sanitary District and the Cities, and BE IT RESOLVED FURTHER, That copies of this Resolution and Board File Nos. 5104 and 5105 be transmitted to the governing bodies of the Cities and their respective interested officials, TRUSTEES Yeas Nayes Adopted by the Board May 14, 16 x BASTIS x DILLON x HOYER 6 In favor R. A. Olson Absent- NELSON Chairman. x PETERSON 0 Against x RYLANDER x Lawrence Rylander CHAIRMAN OLSON Corporate Secretary. Research and Investigation Program - page 4 All of the above would include a consideration of the relative economy of treating all of the sewage to a limited extent to provide the necess- ary degree of treatment as compared to treating a portion completely to the extent of 90 or 95%. 3. Based on present treatment methods followed by subsequent (C) treatment in stabilization ponds for the removal of BOD, suspended solids and nutrients. This study should also include a consideration of nutrient removal in stabilization ponds following secondary treatment by conventional processes should algal problems be indicated. 4. A consideration of the effect of stream flow regulation (C) by present or possible future upriver reservoirs during critical periods on the degree of treatment requirements. Augmentation of stream flows for relatively short periods of time could materially reduce the requirements for sewage treatment. 5. The investigation of sludge disposal facilities applicable (C) to the above treatment methods. C. The Problem of Sewage Service Charges for the Twin Cities and Metropolitan Area. 1. The possible application of the Joint Committee method to (C) this problem. This involves charges based on use as well as on area, front footage, or valuation. 2. Investigation of the effect of the inclusion of strength (C) of waste in addition to the charges on volume now being made. 3. An analysis of the problem of the outside areas following (C) the study of various methods of providing sewerage service to these areas in the future. The outside areas are utiliz- ing capacity in the existing sewage work of the District, the present reproduction cost of which is several times the original cost of the works. Thus, the reproduction cost of the existing District works would be approximately 53 million dollars at the cost level of January 1, 1956, whereas Twin City tax payers and users had to finance only an original cost of about$11, 500, 000 ($15, 800, 000 less PWA Grant). This will mean that the Twin Cities will thereby be required to increase the capacity of its Research and Investigation Program - page 5 works some 5 to 15 years in the future at a cost level which may be 5 or more times the original cost. Because the potential for growth from a pollution standpoint is greater in the outside areas it would appear that the investigation should include a study of the effect of area charges as well as volume and strength charges to measure and assess this capacity for growth. Otherwise, undeveloped property pays little or nothing toward the cost of providing for the extra capacity required for its later use. Present users and particularly those in the Twin Cities would pay an unfair portion of the total cost of providing service. D. Miscellaneous Studies. 1. An analysis of population and industrial growth trends in the (C) Metropolitan area. This investigation would be necessary (D) in any consideration of expansion of either the intercepting sewer or the sewage treatment works. 2. The present and potential uses of the Mississippi River in (C) the Twin Cities and in a stretch of river downstream which (D) could be considered as affected by the effluent of any type of sewage treatment plant. 3. .A study of the factors involved in the increasing industrial (C) load in the metropolitan area and at downstream points, in- (D) cluding allocation of the pollution-assimilating power of the river to the various pollution loads entering it at different points downstream in this area. May 14, 19 56. *(U) indicates work to be done by the University of Minnesota. (D) It ' " " " " " Sanitary District. (C) 11 " " " " " " Consulting Engineers. Note: In some phases of the investigation, however, all three organizations will work cooperatively. KERWIN L. M ICK. PHONE: VA. 8845 DONALD D. WOZN I AK Cri lEr ENGINEER AND SUPERINTENDENT ATTORNEY MINNEAPOLIS - SAINT PAUL SANITARY DISTRICT / .7 - ic ,r6 P. 0. BOX 3598 CHILDS ROAD . SAINT PAUL 1 :: MINNESOTA BOARD OF TRUSTEES ROBERT A. OLSON. CHAIRMAN. DULUTH LOU IS J. BARTSCHER. MAYOR ERIC G. HOYER. VICE-CHAIRMAN. MINNEAPOLIS EXECUTIVE SECRETARY LAWRENCE RYLANDER. CORPORATE SECRETARY. ST. PAUL ADDRESS ALL COMMUNICATIONS COMMISSIONER ROBERT F. PETERSON. Sr PAUL TO THE SECRETARY UNLESS MAYOR JOSEPH E. DI LLON, ST. PAUL OTHEROISE REQUESTED ALDERMAN BYRON F. NELSON, MINNEAPOLIS May 15, 056 ALBERT G. BASTIS, MINNEAPOLIS The ':;:lty .Coun,:ii City t..it ....;..-4int 1.?4al ..,;ity Hall and Courtttou-e :.,:a.int t'Aaal .,..'., .Kirinc4.tota . ttention Mr. Jo.:eis..ila a. chwrieiad, C;ity Cloi,:q,z Gentlemen. a .4.110.,: tiri,6 u.i. the oart ot. Irtlateea of thib anitary Oisteict Monday, iv..ay <.ominkinication (Board iile. 3104) wa.: preLerited by ita Chief :,:avineer Ti ad :::.-uperintendent, is...el-v.4n i... MiLit., propoein g a t''..co!4,raici; of • . ear,,,,ii arid Investigation to at di the determination of tature requii.-e • Unventz., i,,s.r ::.-i.lattary Ji..,trik; bCcloVaLe work:: ( car n i.41 .: F.:005), copies of, • wai,..il are atta‘lieJ ir,t:reto. ..Qpy oi lt.eolution ZA.7, adoeted by the Board at :.aiia, rneetin6, con:, s... in thi ,;:.,,I,Aoi-nrieenciation4 ..'otitairii la its Chief ,--:.;rigiriecr .,7.4cid sJaperinten...:sent' .- .,,ihri:_atit,', ation and authozi.4inis ttip", iriati6,araticin oi aid droirarn of iL17,,iea. n V\ awl Ici,gc:44.1atti,-.0n is6 ai 443 atta,..:.kieu. in ,Droar that you inay be fully informed as to the no,.. ,, of the i.).ropos . 6tra.iy, Mr. 1\4i::.k, who ita1. been,,a4:ited by Tralatee e, J.:)-illon an kete.rson to atteri,1 tric. c..,.....,un,..11. irkeeticu-,, oi ,y-ou:;.. nonorable body '6 i.,:,11.11.! -41.y ir:ornirif.., ay 16, will LI,..." tornt ii' ch,,,,z-e, are any questicivi, requirin caariAcation. Vy truly your,,,, ij or the aoard Oa. 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