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261555 WHITE - GTY CLERK . � PINK - FINANCE GITY OF- ��SAINT PAITL Council CAN/}�RY - DEPARTMENT 1 BLUE - MAYOR . Flle NO. . u cil Resolution Presented By �� Referred To Committee: Date Out of Committee By Date WHEREAS, The Public Works Cornrr►ittee has heard additional reports from the Department of Public Works on the proposed Edmund-Snelling Relief System S-1477, and has also heard additional testimony from residents from within the projects' assessment boundary, and WHEREAS, From the information set forth in the Department of Public Works' report, it is the recommendation of the Public Works Committee that the hearing for the Edmund-Snelling Relief System be rescheduled. Therefore, be it RESOLVED, That the Department of Finance and Management Services be directed to reschedule the Edmund-Snelling Relief System, City Project S-1477, at an appropriate date which best fits the schedule and agenda of the St. Paul City Council . COUNCILMEN Requested by Department of: Yeas Butler Nays I�€ � Publ i c Works Konopatzki In Favor Levine Meredith Against BY � ' �xx Roedler Nenry W. Jack n - Sewer ept. � (� Tedesco Mme.President �C HLirit �i L 3 �7� Form Approved by City Attorne Adopted by Council: Date Certif' P sed b nc' retary BY By Approv by M or• Date 73 Appro d Ma Su o Council gy - BY e�r�s�t� JUL 7 1973 �`"� TO MEMBERS OF COUNCIL COMMITTEE ON PUBLIC WORKS �5` f e . . �(v:.�,V,� . Public Works Committee Chairman Patrick Roedler 'L� " " Committee Member Victor Tedesco " " " " Dean Meredith On Wednesday, February 21 , 1973, a Council hearing on th� Edmond-Snelling Relief Sewer was held. At that hearing six residents in the area stated that they never had a sewage backup in the 20-30 years they had lived in the area and that they were opposed to the project and its proposed assessment. It is worth noting that for this hearing 935 notice� were sent to affected property owners. At the hearing it was also asked that since there were only four reported backups on file that backup valves should be installed in lieu of a relief sewer. The hearing then was laid over and referred to the Public Works Committee to obtain more information , on the value and reliability of installing backup valves as compared to new relief sewers. A brief outline and description of some of the readily available backup valves is as follows: 1 .) Float Type Backwater Valve - Most commonly used in floor drains. It consists of a plastic ball float which is forced up against a rubber seal at the bottom of the floor drain once back-pressure from a overloaded sewer is applied. ConStant maintenance of the rubber seal is required as dirt, grime, trash can accumulate and prevent the float from making a watertight seal . Also the rubber seal bre�ks down after a time because of the sewer environment. Like faucet seals or washers, they should be replaced periodically. 2.) Swing, Revolving or Checkgate Backwater Valve - Most comrn�nly used in floor drains, cleanouts, or anywhere on a sanitary waste line. Most preferably it is piaced just before the outlet to a fixture. It consists of a swing valve which will swing open and allow normal sanitary wastes to flow th�ough it to the sewer. When back-pressure from an overloaded sewer is applied? the valve will swing shut against the normal sanitary flow and seal out the backed-up sewage. Constant maintenance' is required of this type of valve as a sewer environment consisting of sand, grit, trash, solids, etc. can become lodged in the valve or stuck to the seal which would prevent the valve from sealing properly and keeping the backed-up sewage out. 3.) Screw-Dow� or Hydraulically Operated Backwater Valve - Most commonly used on the sanitary waste line where the line enters the home or placed just prior to outletting to a fixture or floor drain. It consists of a gate which is screwed down into the sanitary waste line making a watertight seal to prevent sewage, under back-pressure, fr�'entering the line any further. This type of valve, if manually operated, requires that somebody be available to operate the valve should a backup situation occur or requires that the valve be set before leaving the premises. -2- �� t Conditions that exist once a backup valve is in operation are: 1) No use can be made of the sanitary facilities untii the backup situation passes and the valve is back to normal operation. 2) with the backup valve in operation the sanitary wastes line is put under pressure. This puts joints in a sanitary waste line under pressure when they are not designed for it and as such these Joints could allow sewage to escape into the surrounding earth causing erosion around the pipes, joints , and basement floors. This could become severe enough to cause further leaking at the joint, cracking and breaking of the pipe or basement floor. Does not relieve overloaded sewer. If a present sanitary waste line is set up to receive a backwater valve buying and installing the valve would be very inexpensive. Constant maintenance however would be an absolute necessity to be completely relieved of a possible backup. This cost could be as little as $3.00. The next price range for a backup valve is $50 to a $100 for the purchase and installation. This price range reflects the cost of replumbing the existing sanitary waste line to accept the backup valve. From this price range backup valve costs are in the $200.00 to $1500.00 range depending on whether or not the backup valve is manually or hydraulically operated. In comparison to these costs and degree of relief, assessments for a relief sewer range from $75 to $100 for a typical residental lot at l�t per square foot. This cost is generally about 20$ or less of the total project costs. Also, when a relief sewer is built in an area we are able to keep storm runoff out of the sanitary sewer and confine it to a separate storm sewer. This reduces the chance of a sewage backup. Attached please find the results of an area survey in the Edmond-Snelling project area substantiating that more backups have occ�arred then just the reported four that Public Works had on record. Also, some residents indicate surface flooding problems in the area which the proposed relief system can eliminate. It should also be noted that the project will help relieve a repo�ted backup and surface flooding at Samaritan Hospital which is within the project limits. Also attached is a map showing the new relief sewers, backup compiaints, and surface flooding, a letter from the Building Department on backup valves, and backup valve information. Respectfully submitted, Daniel J. Dunford Director of Public Works DJ D/HWJ/e,j g Attachments . �� J �� SUMMARY OF EDMUND-SNELLING RELIEF SEWER SYSTEM RESIDENTIAL SURVEY Total No. of Notices Sent 935 Total No. of People Surveyed 320 Total No. of People Contacted At Home 122 Total No. of People Contacted by Post Card 198 Total No. of People Responding 253 Total No. of People Indicating a Sewer Backup 44 �, � � � � � �� 26j , � ' .' � .� .,> CapitaG of Minneso�Fa �� + " "� � � . ^ . �. - �F a. =^:� „�«. ,.'— _"'-"'^., ;�. a �'� g„ ,�' %.` `�.__T`+� ��J j�t i�� k • --uL� a a..a ��.'.' +..:� , I , e,� s ��a !� � ° r^ _ � �` .; > . . .,. ��__ �� , . .> �, � � r __ {-."=� ��-�� : �8U .� ` �7F PU��„`B�UIL�IN�S� ' i��ij��,� . �, ... .-+ ;, y•:. , ` . :L - , zc+-G_- Y{ , ,ti.y �� + � .. -^-",,"°' ''� -��'�'��" � "''�'f� y.,� . ,. �-t��ri'' `7 - r - ' -, '��_�q'��. � 445' �it�r Haa��k�� ► ..�� ,,l:�.;��,-. �� ,�� , _,�.�.» �.. . � � . �_ . . ' , . . r. +�l�N�._yf'�°.,� i �. Y-��'s.r�,✓..-k 'O� ��r: _`e� .0 � '�""t�, w _ 's�; °wk^,a"��,.y� „-^ C'� :""P,�"' ''�fi'� ' - � .,.� +s-� r . . '� � � 'SiGy .. .' �9Y?^�`t.fy�,,� r- -•9"'" ._� ` .�.�. _ _' " & ;;y, �'�.+ ! w 15�� x�`�d Jec s�" ...rsnr- �k2�"�. �+ 'b A . ��F ..f fV!i �� 0!� � � . . ,� �. + ac�%'"�'u��' � � �' `�' �� .� �� e y . � T � �j`x��` y ( i .''"c„ti��a�a�,. . � .JSS": ' t ?, st z a,r c� ,.� r+' a �-w+;:.,, _ � �.'.`ei' 'e*;.{ rr �f,�'q; . .1,.'fi�:. �F�" ^'h' .�.:�.. _ s�. "; '�Ea` �s..'d, �` �� v ..a, S�n,..,a. � e.�F ro�s ; ,�_": . Bl1R�Al! OL PUBUC BUILDlNGS �45 City Hail, 5b102 223-4212 March 5, 1973 �� e^�`'¢�n � 6�' Mr. Jess Baker Sewer Design „ �j � Department of Public Works �� 234 Court House u� ,^Y� a_ Re: Back Water Valves � D e a r S i r: Q,�.� ��e�L .�R�,g.cc.QsZ, � � ��r The design and installation of backwater valves varies so widely that it is difficult to make a reasonable estimate of costs or work involved in their installation. There are many factors to be considered in attempting to protect a building from sewer backwater. To be taken into consideration, are elevation of building in rela- tion to surrounding area, elevation of deepest parts of basement, number and type of plumbing fixtures subject to backwater, location of fixtures and also the highest anticipated water level in sewer. In the case of a house or building where a floor drain only or a floor drain and one other fi�;ture such as a laundry tray are subject ' to backwater, the installation of backwater valves can be quite simple ana inexpensive. If �he floor drain is a type designed to accommadate a backwater valve, the vaive can be bought for ab�ut three ($3.00) dollars and needs only to be screwed into �he drain. If the. floor drain must be changed, the cost could run quite high, possi�].y one hundred ($100.00) dollars or more depending �n condi- tions. A singlP fixture such as a laundry tray or sink could be protected by �the installation of a check valve in the trap arm. This could cos� up t� fi£ty ($50.00) dollars or more. When water closets or similar fixtures or groups of fixtures are involved, the problem becomes more involved. The Minnesota Plumbing Code prohibits the ir_stallation of backwater valves on builcling drains so they must be installed in the branches to these fixtures. 'Irhe cost of this type of installation including the necessary concreLe breaking and patching would run at least two hundred ($2�O .G0) dollars. ��7 ,• � ,-� 261�� -2- Mr. Jess Baker A11 of the installations mentioned above are using the lowest priced backwater valves on the market. The best that can be said for any of these installations is that they are �a gamble. These flapper type valves are subject to failure for many reasons, such as sticks, etc. , becoming lodged in the flapper holding them open and rendering the valve useless. They must be installed so that they are accessible at all times. If valuable decorations, furnishings or merchandise is located or stored in such basements, a more foolproof inethod of protection would be necessary. This would necessitate the installation of absolute shut-off gate. This could be installed in the building drain as it would normally be in an open condition. The valve would either be a manually operated gate or an automatic, hydraulicaly operated valve. If it is manually operated, it would be no better than the attendant charged with the responsibility of closing . it when a backwater condition occurs. There is also an installation cost of at least two to three hundred dollars ($200.00 to $300.00) involved in the r�--inch size. foar The ultimate in baekwater valves, the hydraulicaly operated valve is fully automatic, but the cost of such an installation is very high. Just as a guess, I would say that it could easily be a minimum of fifteen hundred ($1500.00) dollars or more. I hope that the above information will be of some help to you. Yours trul , � Frank Strub Senior Plumbing Inspector E�,f' ��SG FMS:ds �/s►� � C�� 0� , ��``-� . �ITY O.► . �'14 °s� m r � 0 i+ �,i,-,..1,« O P .:.- � �s.�� CITY OF SAINT PAUL Capital of Minnesota DEPARTMENT OF PUBLIC WORKS 234 City Hall � Court House 55102 DANIEL J. DUNFORD Director of Public Works ,June 7, 1973 The tbnorable Lawrence D. Cohen Mayor of the City of Saint Paul Room 347 City Nail BUILDING Re: Attached Council Resolution requesting rescheduling of the EDMUND-SNELLING RELIEF SYSTEM, Public Works Project No. S-1477. Dear Mayor Cohen: The first Council hearing for the above mentioned project, held on February 21 , 1973, was laid over indefinitely in order that the Council Public Works Comrnittee could obtain information as to the reliability of installing back- up valves or relief sewers to relieve sewage back-ups. The back-up valve question was prompted by the fact that the Departr�nt of Public Works had initiated a $500,000 relief sewer construction project, having only four reported back-up complaints on record. Since that February hearing, the Department of Public Works has conducted an area survey and noted that forty-four homeowners in the area have experienced sewer back-ups. Of particular interest is the fact that out of the 935 people within the assessment district that were notified of the hearing, apparently only six residents (all opposed to the project) appeared at the hearing. Based on the above information and the attached report to the Council Public Works Committee, I respectfully request that the attached proposed Resolution be submitted to the Council requesting that the hearing for the EDMUND-SNELLING REIIEF SYSTEM be rescheduled for a time which best fits the Council schedule. Y very tr . Daniel J. Du rd DJD/HWJ/ejg Director of Public Works cc: J. William Donovan Robert Trudeau F �� ' � �L� / �` f C . Patrick J. Roedler, Chai�man COUNCIL CON1rIITTEE ON PUBLIC WORKS _ �� , . �� MINUTES OF riEETING: Wednesday, April 25, 1973 9:00 a.m. Room 707 City Hall , PRESIDING: Councilman Patrick J. Roedler, Chairman ME1�ERS PRESENT: Councilman Meredith � Councilman Tedesco OTHERS PRESEivT: Daniel Dunford Jerome Segal � - Henry Jackson Carl Ewert Walter Hurtley (See also attached list) J. Wm. Donovan Roq Bredahl l. Downtown Sidewalk Cleaning Chuck Ewert appeared for Operation '85 and discussed the area to be included in any report on cost and assessments. Mr. Ewert said he would bring in resolutions supporting the idea from the Downtown Council, the Chamber of Commerce and Operation 'S5. Mr. Dunford said he would report back with assess- ment figures for the area from Kellogg to 8th Street, and from Wall Street to Sevea Corners (which would inciude the Civic Center) . _ 2. D3scussion of Fitaa� Order on Edmuad-Sne1li�Rel�ief �ewer. . . The Com�ittee recoauaencied approval of the order fol2qwiag a prese�tatian by M�t. Dunford and Mr. Jackson of the Public Worl�cs Department on a survey taken by the department. They explained that �of 320 residents surveyed in areas where the sewer was overloaded, 253 responded and 44 reported backup problems related to storm conditions. In addition, they said, others re�orted backups due to root probZems and conditions of the service line. Several citizens appeared and spoke against the sewer, explaining that their properties did not have backup problems. 3. Discussion of the condition of Ruth Street � Councilman Tedesca said the .street is in terrible condition, primarily because of increased heavy traffic due to development in the area. Mr. Dunford said the City will be putting in permanent patches on Ruth Street and the unit costs will be charged back against the contractors who made sewer cuts in the street. . _ 4. Resolution requesting the Metropolitan Transit Commission to change bus_ routes in the downtown area. The Committee recommended approval followino a report by Mr. Dunford on the results of a survey showing the bus route changes would be more convenient to downtown passengers. � . 5. "No Charoe" Assessment Policy for the repaving of main arterial streets. The Co:�ittee reco�nended approvai following a report by rir. Dunford that the policy change would not require additional funding and the repaving costs ' would be completely covered by state funds. . The meeting adjourned at 9:50 a.m. � • ) . G�� . ---r ��.,- Y�a�.� i � � � �V � . _____________ _.__.____-_- ______ 2615�5