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HomeMy WebLinkAbout1975-06-09 238 AC RESOLVE236 AC Introduced by Councilor Speirs, June 9, 1975 CITY OF BANGOR QITLE.) pwlVt,_-Authppizmg. N,e,,,gits_nenage: ,co aPtei, Inpo�an._ry:eeme�c _ .........IXC., i By AS car Cea l sffAe ay of Ramer. BBBOLVBD, TMRT, the City Manager be authorized to enter into the attacher] agreement with the James W. Sewell Company of Old Town for the design analysis add the preparation of working drawings for the Penobscot Interceptor Sewer @ tension from its present terminus to Grotto Cascade Park, and b, it further R660LVtp, that the sum of $50,000.00 be appropriated to cover the cost of said engineering Services and that this sum be drawn from the Capital .Construction Fund, Reserve-hatnre Construction Sewers, Account Nnmber 92-2236. L - IN CITY COUNCIL /June 9) 1975 Received let reading. Consider next mating. 611."Lns1 Q.und CIN CLO # IN CITY COUNCIL .Tine 23, 1975 Received 2nd reading and final passage by the following yea and no vote. Councilors voting yea: Baldacci. Ballow, Bigney, Brountas, Gass, Henderson, Soucy and Speirs. Councilor Keeney absent. 6%z /� J CITY 238 X [ OES OLIVE Authorizing lity Manager to Enter Into an Agreeneent wish Jams W. Sowell Coaparg, Design of Penoomot Intexceptor Extension. . JAMES W. SEWALL COMPANY OLD TOWN, MAINE Daace ... June 3, 1975 Mr. John Frawley, City Engineer City Hall 73 Harlow Street Bangor, Maine 04401 Re: Penobscot Interceptor Extension Dear Mr. Frawley: We are pleased to submit herein our proposal for design and preparation of working drawings for extension of the Penobscot River Interceptor from Its present terminus near the junction of Hancock and Washington Streets upriver to the last City sewer outfall at Grotto Cascade Park. Part A. - Design Analysis The proposed extension involves certain aspects that should be examined and r solved before commencing detailed design, the major items of which are as follows: I. Future Extension to Penjaj aw - Routing and grades for an extension to Penjajawoc should be investigated and worked out In preliminary form, to assure that the Iocation, elevation and configuration of the sewer at Grotto Cascade provides for and facilitates this extension. We would expect our work could be done on the 401/11 scale mapping augmented by field r of the sel acted route. It may be desirable, however, to obtain a a few probengs to check ledge depth at the knoll opposite the State Hospital grounds and possibly at a second knoll just beyond the "Lanterns Four". P. Alternate Routes at EMMC - Maintaining gravity flow by EMMC requires a route along the Maine Central Railroad in a a that will have can- strIcted workspace, limited a ou nr-precipits side slopes, ledge at o ear the surface and otherwise"pensive pensive c nstruction conditions. The alternative sa pump station at the southwest corner of Grotto Cascade with a force a m up State Street to the high point opposite EMMC's new wing, thence by gravity to a trunk sewer Ing State and going to the river at the west boundary of EMMC. .roThe pump alternative will require investigation of how best to connect drains from EMMC (there are four, down over the bank, widely separated and difficult to join together). The alternatives both should be ex - mined in sufficient detail to generate reasonable proximate costs for comparison and to define the major elements of construction. It is con- ceivable the gravity sewer may be pad or pier supported at or above ground level <v nuoe � ATLANTIC RESOVRCE CONSULTANTS LTw OE9ERL NOVA SCOTIA, CANADA T -2- JAMES W. SEWALL COMPANY for at least part of Its route, for example, and the type of construction elected should be outlined for review by the City before proceeding further. The same is true with respect to location and type of structures and piping for the pumping alternative. In addition to the physical nature and cost of thexconstruction, several other aspects should be brought into consideration - operating and maintenance costs, ac sabllity, present and future design flows, easement costs, railroad -related costs, need for overflows, operating dependability, to cite a few. The selection should be made in the context of 1201 Facilities Planning require - marts, which the City must respond to if It eventually requests Federal and State grant assistance. We would therefore approach the work from this standpoint although aa omplete 1201' plan/report is not within the scope of this proposal. 3. Design Flows, overfi ows - Inv, w of the substantial ones this interceptor will be capable ofdraining, careful attention will be needed in the derivation of design flaws to be used in sizing pipes, structures and equipment. The combined nature of certain of the savers complicate the problem in that wetweather o erfl crs will probably be needed at same points along the route (under present water quality regulations, we would expect that an overflow would be permitted at the trunk west of the Hospital and the trunk west of Grotto Cascade, but that the City would be required to demonstrate need and describe overflow frequency, duration, etc, characteristics). It will therefore be necessary for us to obtain all pertinent flow design data curently available, and possibly to perform additional research, field investigations and office computations a appropriate otablish the specific fl or design basis. We would not expect to duplicate previous work performed by ourselves o others and still valid under current guidelines, but rather to update and extend as necessary for design purposes. 4. Veazie - Investigation of the possible inclusion of sewage from the Town of Veazie will be Iimited to impact on the Danger system in terms of capacity in the connecting Severs, pump stations and treatment facility, -also in terms of configuration requirements at the point of connection near the mouth of Penjaj awoc Stream and system sizing requirements from this point downward to the present interceptor terminus. 5. Chlorination - An evaluation of elapsed flow time under present and future flow conditions should be made to determine if flax chlorinationis n eeded, either as part of the present Irate l l at Ion o a future provi s ion.The re location of chlorinating facilities quipossibly should be keyed to the location of a major overflow, so as to be dual-purpose in the event overflow chlorination becomes a requirement in the future. 6. Railroad Rev]we - Since much of the.route will be along the Maine Central Railroad tracks, the proposed installation should be explored with Me CRR to establish their requirements for working clearances, trench sheeting In proximity to tracks, pipe crossings under tracks, scheduling, flagman, -3 - JAMES W. SE WALL COMPANY track repair, cost of permits and other considerations, The Possibility of using rail cars for mobile pipe and equi prsnt storage, equipment operating platforms, etc. should also be explored. ]. EHHC - Investigationeeded concerning how the Hospital s could s n intern ewers be connected to the city System if the pumping alternative is elected (the new wing complicatesgravity routing and may require a end pump- ing installation), and d alalterations of Meexisting s may be needed if the gravity route is chosen. The Hospitalis susering falling the east end of their ctDfor parking and ether uses; familiar with this aspect and can provide the necessary information for the Interceptor program. Some additional field survey work will be needed In the design analysis phase to determine elevations, sizes and locations of connecting sewers, and out smaller detail not shown on the 40 -scale mapping and establish approximate locations of underground utilities. Probings should also be made along the proposed routes of the Interceptor, in at least sufficient points t0 validate the cost comparisons. The results of the foregoing and recommendations arising therefrom will be presented to the city in brief, narrative form accompanied by a location plan prepared on the 40 -scale mapping, together with detail sketches a necessary to Illustrate the proposed mode of construction. Comparative costs estimates will be Included, as will the results of probings and other data needed to define the design basis. Part B - Detailed Designs, Working Drawings Foie owing the City's revi ew and authorization to proceed with final design, this Company will undertake the following work: 1. Performance of design calculations. 2. Preparation of detailed designs and working drawings, in pencil on tracing paper. 3. Preparation of technical specifications. 4. Preparation of bidding schedule (unit price contract format). 5. Prepare estimate of 'quantities of contract units, for bidding purposes. 6. Preparation of special provisions todbe included in the contract docu- ments. 7. Preparation of coordinate computations for route alignments and essential baselines (forA.ayo4t purposes). S. Preparation of layout plan showing control point coordinates, angles, grid bearings, line lengths, relocation ties. -4 - JAMES W. SEWALL COMPANY 9. Preparation of easement ent plans cross-referenced between construction entero reference lines and McCRR centerline, or rights-of-way, boundaries or other reference as appropriate; private boundaries, street monuments and other readily available points of property reference (the making of detailed property boundary surveysnot contemplated hereby, the intent being merely to furnish ready refer- ence to existing Indicators of property boundaries). 10. Furnish to the City one print copy and one reproducible copy of Contract Drawings, layout control drawings and easement Iacetion drawings. 11. Furnish to the City the master copy for technical speclflcations, special provisions and bidding schedules either as offset masters, stencil masters or bond copy as desired. I2. Prepare and submit estimate of construction cost based on bidding schedules derived from the final plans. In the performance of the foregoing, this Company will meet with the City Engineer and others of his designation relative to preferences in pipe materials, designation of specific items such as manhole frames and covers, pumps, motors, controllers and other items wherein the City has established standards or, for inventory maintenance and interchangeability, prefers specific manufacturers or models. It is presumed the City has Its own standard form of Notice to Bidders. Information for Bidders, Proposal Form, Contract Form and General Con- ditions to the Contract, or will use the Federal Agencies Standards, for which reason these items a act included in the Contract Documents to be provided by this Company. We do, however, have our standard forms for these documents, which will be made available to the City if requested. It Is also presumed there may he a time leg between plan completion and scheduling of construction, for which reason the plan and speciflcatlon sets 0 not to be printed in quantity atthis time. Unless otherwise requested by the Cl ty, the plans will be drawn on the standard sheets used by this Company (241- x 36P, JWS Title Block). Part C - Additional Services In the event the City desires assistance in preparing grant applications, icontract advertising, construction stakeout, materials testing, shop draw- ng review, construction inspecti On or for other project purposes, the some n be provided under the schedule of rates for personnel and reimbursement for expense attached hereto. TIME Work under this proposal can begin within ten days following authorization to proceed, itsestimated that 45 days will be needed to complete Phase A, Design Analysis, and that approximately 60 days will M needed to complete contract plans and specifications following the City's authorization to -proceed with Part B. -. "lf r -s- JAMES W SE WALL COMPANY The above schedule is established such that it can be comfortably coor- dinated with other requirements of our projected work load. Recognizing the fluidity of the present grant funding situation, however, we are pre- pared to accelerate completion if so requested by the City. COMPENSATION Since it Involves an investigation of alternative routings and is dependent, at least in part, on the reactions of various parties thereto, the nature and extent of work under this proposal cannot Be exactly predetermined. From r preliminary assessment of the factorsinvolved, we would estimate that the cost of Part A,DesignAnalysis, would not exceed $5.400 and the cost of Part B, Detailed Design, Working Drawings,. would not exceed $28,600. The foregoing are submitted as limiting amounts, not to beexceeded except with the written authorization of the City. Our actual invoicing would be based on the schedule of charges for personnel and reimbursement for expense attached hereto, accompanIed by invoices received from other forms employed by us for project purposes, such as for subsurface investigations. This schedule will hold firm forallwork authorized prior to January I, 1976. Given the uncertainties of project scheduling, however, we must reserve the right to review and adjust the schedule, if necessary to meet then -current conditions, for work authorized subsequent to that date. ACCEPTANCE Four copies of this proposal are enclosed. The retssndbf one copy signed In the space provided will constitute the City's acceptance hereof and, unless otherwise directed. will authorization to proceed. We very much appreciate this opportunitytobe of service and hope our proposal is acceptable to you. Very truly yours, James W. Sewall Company gy William G. Ryan, P.E. Chief, Engineering Dept. Accepted. City of Bangor Date By JAMES W. SEWALL COMPANY JAMES W SEWALL COMPANY ENGINEERING DEPARTMENT Charges for Personnel Department Head Senior Project Engineer Assistant Project Engineer .Engineering Aide Draftsman Sanitary Laboratory Technician Senior Inspector Inspector 4 -man Survey Team 3 -man Survey Team 2 -man Survey Team Effective January 1, 1975 Hourly $20.00 18.50 15.00 12.00 10.60 12.00 16.00 10.00 32.50 28.50 22.50 (Time charges for survey personnel, draftsmen, engineering -aides, inspectors, and laboratory technicians will be Increased by 1/3 when time in excess of 8 hours per day or 40 hours per week is re- quired.) Expenses Reimbursement for out -of -office travel and subsistence expense, long-distance telephone and telegraph charges, postage, miscell- aneous supplies and similar, direct expense will be additional tothe above charges for time.