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HomeMy WebLinkAboutORDINANCES-1970-030-O-70Form 2a BLI 500 11.56 f E , 0 • • :_'55 30-0-70 AN ORDINANCE FOR THE CONSTRUCTION OF A LOCAL IMPROVEMENT known as EVANSTON SPECIAL ASSESSMENT NO. 1313 BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF EVANSTON, ILLINOIS: Section 1. That a local improvement shall be made within the City of Evanston, County of Cook and State of Illinois, the nature, character, locality and description of which is as follows, to -wit: The roadway of the public alley in the block bounded on the north by Davis Street, on the south by Grove Street, on the east by Fowler Avenue and on the west by McDaniel Avenue, in the City of Evanston, County of Cook, State of Illinois, be improved by grading, con- structing necessary storm sewers and drainage structures, and paving to a width of fiftean (15) feet with a Port- land cement concrete pavement eight (8) inches thick. Section 2. That the Recommendation of this Ordinance by the Board of Local Improvements of the City of Evanston, Illinois, and the Estimate of the cost of said improvement made by the Engineer of said Board, both hereto attached, be and the same are hereby approved and by reference thereto made a part hereof; Section 3. That said improvement shall be made and the cost thereof, including the sum of Twenty —One Thousand, Two Hundred Twenty -One & 50/100 ($219 221.50) --Dollars, being the cost of making and collecting the Assessment and all other expenses as provided by law, shall be paid for by Special Assessment in accordance with an Act of the General Assembly of the State of Illinois, known as the and the Amendments thereto; "Ill. Municipal ode," effective July 1, 1961, Section 4. T t the aggr •----- •- egate amount to be assessed and each individual assessment shall be divided into ----- te-n ....(10 installments in the manner provided by law, and each of said installments shall bear interest at the rate of ------- S i X per centum (........ ._go') per annum from the date of the first voucher issued on account of work done upon said proposed improvement; Section 5. That for the purpose of anticipating the collection of the installments of said assessment levied against the real estate benefited thereby, bonds shall be issue payable out of said installments, bearing interest at the rate of _________________SiX per centum (._.._.._.-__ ') per annum, payable annually and signed on behalf of the City of Evanston, Illinois, by its Mayor and attested by its City Clerk and its corporate seal affixed thereto; and each interest coupon attached to said bonds shall likewise be executed by and shall bear the official or facsimile signature of the same officers who signed said bonds and who, if facsimile signatures are used, do adopt by their execution of said bonds as and for their proper signatures their respective facsimile signatures appearing on said coupons; and that said bonds shall be issued in ac- cordance with and shall in all respects conform to the provisions of an Act of the General Assembly of the State of Illinois, known as the "l e't�Set}tCMiescxffd<X�ii @BXXdt'%X i'dt-N AttgmstX>;SX)IR41, and the Amendments thereto; "I11. Municipal Code," effective July 1, 1961, Form 2b BLI 500 11-56 Richard Gatti President Section6. That -------------- ------------- - -----..................... _........................................... �.................................................. of the Board of Local Improvements of the City of Evanston, Illinois, be and ....he is hereby directed to • file a Petition in the County Court of Cook County, Illinois, praying that steps may be taken to levy a Special Assessment to pay the cost of said improvement in accordance with the provisions of this Ordinance and in the manner prescribed by law; Section 7. That all Ordinances or parts of Ordinances conflicting with this Ordinance be and the same are hereby repealed; and Section 8. That this Ordinance shall be in force and effect from and after its passage and approval according to law. Adopted by the City Council of the City of Evanston, Illinois, on the __-___-_day of A. D. 19..70..... • 0 ................................................... City Clerk Approved........................................................... 19.......... .................................................................................... Mayor w iLV ;co a � o 0 0 c. o y 0 O P, CJ � Ea ;cam O ., w O k Q. R. Q r e . Form 3 BL1 500 11-58 J? RECOMMENDATION OF THE BOARD OF LOCAL IMPROVEMENTS • TO THE CITY COUNCIL OF THE CITY OF EVANSTON, ILLINOIS. The Board of Local Improvements of the City of Evanston, Illinois, herewith submits the draft of an Ordinance for the making of a local improvement within the City of Evanston, County of Cook and State of Illinois, the nature, character, locality and description of which is as follows, to -wit: The roadway of the public alley in the block bounded on the north by Davis Street, on the south by Grove Street, on the east by Fowler Avenue, and on the west by McDaniel Avenue, in the City of Evanston, County of Cook, State of Illinois be improved by grading, constructing necessary storm sewers and drainage structures, paving to a width of fifteen (15) feet with a Portland Cement Concrete pavement eight (8) inches thick, and as part of said Ordinance and in conjunction therewith, said Board also herewith submits the Plans and • Specifications of and an Estimate of the cost of said improvement, including the cost of engineering services, as finally determined by said Board; and said Board hereby recommends the passage of said Ordinance and the making of the improvement described therein. • Approved as to form: David T. Onixt Attorney for the Board of Local Improvements of the City of Evanston, Illinois. Respectfully submitted, BOARD OF LOCAL IMPROVEMENTS of the City of Evanston, Illinois. by - - ------------------- on a majority of the'members of said Board. RESOLUTION. SPECIFICATIONS, ESTIMATE AND PLANS FOR A_ LOCAL IMPROVEMENT is • RESOLVED, By the Board of Local Improvements of the City of Evanston, County of Cook, State of Illinois, that a local improve- ment, to be paid for by special assessment in accordance with the provisions of Division 2 of Article 9 of the Illinois Municipal Code effective July 1, 1961 as amended, be and the same is hereby or- iginated to be made within said City of Evanston, as follows: That the roadway of the public alley in the block bounded on the north by Davis Street, on the south by Grove Street, on the east by Fowler Avenue and on the west by McDaniel Avenue, in the City of Evanston, County of Cook, State of Illinois, be improved by grading, constructing necessary storm sewers and drainage structures, paving to a width of fifteen (15) feet with a Portland Cement Concrete pavement eight (8) inches thick, in accordance with attached Specifications, Estimate and plans. 2-70 ALLEY PAVING The grade of the center line and outer edges of the pavement at intermediate points -shall be as indicated on attached plans. The upper surface of the pavement herein provided to be constructed, when completed, shall conform to the arc of a circle passing through the respective grade points at the center line and at the outer edges of the pavement, and shall be true and symmetrical. GENERAL The improvement herein provided to be constructed shall be con- structed in accordance with the "Standard Specifications for Road and Bridge Construction", prepared by the Department of Public Works and Buildings of the State of Illinois and adopted by said department August 1, 1968, and Revisions and Additions thereto, together with the following Special Provisions. In case of conflict between said speci- fications and these Special Provisions, said Special Provisions shall take precedence and shall govern. Said specifications are on file and may be inspected at the office of the Public Works Group Manager, Municipal Building, Evanston, Illinois. The following terms appearing in said specifications shall be interpreted as follows: "STATE" shall mean "CITY OF EVANSTON." "DEPARTMENT OF PUBLIC WORKS AND BUILDINGS" shall mean "DEPART- MENT OF PUBLIC WORKS" of the City of Evanston. • "ENGINEER" shall mean "CITY ENGINEER" of Evanston. EXAMINATION OF SITE OF WORK: The bidder shall, before submitting his bid., carefully examine the specifications and proposal. He shall inspect in detail the site of the proposed work and familiarize himself with all the local conditions affecting the contract and the detailed requirements of construction. If his bid is accepted, he will be re- sponsible for all errors in his proposal resulting from his failure or neglect to comply with these instructions. PROPOSAL GUARANTY: Each proposal shall be accompanied by a certified check on a responsible bank in the amount of ten percent (10%) of the gross sum shown in the proposal. The certified checks of the un- successful bidders shall be returned upon the award of contract, The certified check of the successful bidder shall be retained only until his bonds are approved and the contract signed. - 1 - 4-70 ''60 WORKMEN'S COMPENSATION AND PUBLIC LIABILITY: The successful bid- der at the time of execution of the contract shall furnish evidence of • an Illinois Workmen's Compensation Policy, and shall also be required to carry full liability insurance protecting the City of Evanston against all claims for accidents to workmen, other persons or property. PERFORMANCE BOND: Within ten days after receiving notice to the award the successful bidder shall execute, in quadruplicate, a contract with the City of Evanston for the complete performance of all work there- in specified and shall furnish a surety bond satisfactory in form to the Corporation Counsel, in the penal sum equal to one-third (1/3) of the estimated aggregate amount of the contract. The condition of said bond shall be that the bidder will faithfully keep and perform all the cove- nants and agreements in the manner set forth in the contract. Said bond shall be executed by the bidder as principal and by a reliable surety company as surety. The surety company shall be duly authorized by law to execute and deliver such bond in the State of Illinois and shall be acceptable to the City of Evanston. Said bond shall remain in full force and effect during the life of the contract and shall be held in the cus- tody of the Public Works Director. MAINTENANCE BOND: The Contractor will be required to furnish a maintenance bond to the City of Evanston, in a sum equal to one-third (1/3) of the contract price, guaranteeing improvement against all de- fects arising from poor material or poor workmanship for a period of two (2) years from the date of acceptance and completion thereof, SPECIAL EXCAVATION: Prior to laying down the pavement thereon, the alleys herein specified to be paved shall be cleaned in a thorough and workmanlike manner of all debris and rubbish such as deteriorated pave- ments, crossings, box drains, culverts, trees, stumps, etc. Excavation shall be done in accordance with the requirements of Section 205 of the "Standard Specifications". Such portions of the excavated material as shall be selected by the Engineer shall be Lauled by the Contractor, to, and dumped at, locations within the City of Evanston to be designated by the Engineer. PREPARATION OF SUBGRADE: The subgrade shall be constructed so as to have as nearly as practicable, a uniform density throughout its en- tire width.. Compression of the subgrade material shall be accomplished by successive operations of a self-propelled tendem roller, weighing not less than three (3) nor more than five (5) tons. Portions of the subgrade inaccessible to the roller shall be wetted and tamped solidly with a hand tamp weighing not less than fifty (50) pounds and not to exceed one hundred (100) square inches in area. All soft, spongy or yielding spots and all vegetable or other such objectionable materials shall be entirely removed and the space refilled with sandy soil. Any depressions that appear during the rolling shall be filled with sandy soil and rolled until the whole shall be uniformly compact and firm. - 2 - '' 6 1 Rolling shall continue until the subgrade is uniformly compacted, brought to a true shape and to an elevation uniformly eight (8) inches below the established grade and cross sectional contour of the top of the pavement. Where the soil in the alley consists of sand or sandy soil incapable of compaction by rolling or tamping, said compaction • shall be accomplished by thoroughly flooding the subgrade. After being prepared in the above manner the subgrade shall be so maintained until the pavement has been placed thereon. CHECKING AND ACCEPTANCE: Immediately before the pavement is laid, the subgrade shall be checked by means of an approved template, shaped on the under side to conform to the lower surface of the finished pave- ment, or by a method of testing approved by the Board of Local Improve- ments. All high places shall be removed to true grade and any low places filled with sandy soil and rolled or hand tamped until smooth and firm. The subgrade shall be checked and completed in accordance with these re- quirements for a distance of not less than one hundred (100) feet in advance of the pavement. If hauling over the subgrade after it has been finished and checked as specified results in ruts or other such ob- jectionable irregularities, the contractor shall reroll or hand tamp the subgrade and place it in smooth and satisfactory condition before the pavement is deposited upon it. If the condition of the subgrade is such that it cannot be placed in satisfactory condition to receive the pavement, paving shall be stopped by the Engineer unless the contractor provides and hauls over suitable trackways or uses other means for the protection and maintenance of the subgrade. The cost of subgrade prepara- tion and all excavation and replacement required by these specifications shall be included in the unit price bid for Special Excavation. SEWER CONNECTIONS: All existing connections to the present sewer shall be protected against damage during the construction of this proposed improvement. Any connections damaged shall be repaired immediately by the Contractor at his own expense. TRENCH BACKFILL: This item shall consist of furnishing sand or stone screenings from beyond the limits of this improvement, placing it where directed by the Engineer and puddling same with water until settle- ment is complete. It shall be used for backfilling trenches, between new retaining walls and existing foundation walls, building foundations, water main excavations and any other cavity which may occur in the area of this improvement or where the inner edge of a trench is within two feet of the edge of this improvement. PORTLAND CEMENT: Portland cement used in Portland Cement Concrete pavement, Portland Cement Concrete Base Course, Portland Cement Concrete Curb, Portland Cement Concrete Sidewalk and Class 'T' Concrete shall comply with the requirements of Specifications for Air Entraining Cement for Concrete Pavements, A.S.T.M. Designation: C 175, Type 1-A. All portland cement used in this contract shall be included in the contract unit price for the several payment items involved. - 3 - 1-70 I I i PORTLAND CEMENT CONCRETE PAVEMENT: Portland Cement Concrete Pave- ment shall be constructed in accordance with Section 408 of the "Standard Specifications", except that the final finish shall be obtained by the • use of two (2) separate burlap drags, having a double thickness, be at least four (4) feet wide and two (2) feet longer than width of slab under construction. The burlap shall be attached to a bridge riding on pave- ment forms and be kept saturated while in use. It shall be laid on the pavement surface and dragged in the direction pavement is being laid, with approximately two (2) feet of width in contact with the pavement surface. The burlap drag shall be kept clean and free of hardened concrete. The Engineer may require changes in belting, burlapping and equip- ment to produce desired final surface texture. Payment for PORTLAND CEMENT CONCRETE PAVEMENT shall be based on pavement cross section with an eight (8) inch uniform thickness. Contract unit price for PORTLAND CEMENT CONCRETE PAVEMENT shall include paymentg, for all material, labor and equipment necessary for the construction of this pavement. LONGITUDINAL CENTER JOINTS: The concrete pavement shall be built so as to have a longitudinal center joint. Said longitudinal joint shall extend along the center line of the pavement the entire length of the improvement. The joint shall be made by installing a specially built metal strip which will separate the concrete. The said strip shall be made of No. 18 gauge sheet steel seven and one-half (72) inches in width, and shall be delivered on the work in ten (10) foot lengths. Said strip shall have a trapezoidal corrugation along the center thereof, two and one-half (22) inches in vertical dimension and one (1) inch in horizon- tal dimension. Adjoining strips shall butt each other tightly and be securely fastened by means of metal clips. Said strip shall extend • vertically from the base of the concrete pavement to one-half (2) inch below the top of the finished surface of the pavement and shall be held securely in vertical position to straight alignment, by means of steel pins, left in place, driven vertically through holes punched through said strip and not to exceed two and one-half (22) feet centers. The pins used shall be three -eights (3/8) inch in diameter and not less than fifteen (15) inches in length. Deformed steel tie bars one-half (2) inch in diameter and two and one-half (22) feet in length shall be placed through the longitudinal joint in openings punched for that purpose, which openings shall be along the center line of said strip so spaced as not to exceed two and one-half (22) feet centers. Each bar shall be %eld rigidly in horizontal position during the placing of the concrete by the use of two (2) metal bar chairs driven into the subgrade. A template shall be used to install the strip vertically to straight alignment prior to the deposition of the concrete and the joints shall not be displaced during the finishing operation. Furnishing all material, labor and equipment for installing of said longitudinal joint and tie bars shall not be paid for directly, but shall be considered incidental to the construction of the Portland Cement Concrete Pavement. - 4 - -_e3 TRANSVERSE EXPANSION JOINTS: Transverse expansion joints shall be placed throughout the entire improvement across the concrete pavement at right angles to the center thereof and at intervals of one hundred • (100) feet measured along said center line. The expansion joints shall be made by placing and leaving in place prior to laying the concrete mixture for the pavement, a bituminous premoulded joint filler con- forming to the requirements of Article 715.04 or 715.05 of the "Standard Specifications." Said joint filler shall be three fourths (3/4) inch in thickness and shall extend vertically from a point one (1) inch below the top of the subgrade to a point one half (2) inch below the finished grade of the pavement. The intervening space between the top of said joint filler and the finished grade of the pavement shall be filled with Asphalt P.A.F.-3. Load transfer across said expansion joints shall be accomplished by installation of three -fourths (3/4) inch round smooth steel bars eighteen (18) inches long at fifteen (15) inch centers through said joint filler, or by other load transfer device approved by the Engineer. One end of each of said steel bars shall be furnished with a metal or fibre cap to provide one (1) inch of expansion space. Said steel bars shall be maintained rigidly in proper alignment by approved means. All manhole frames and other fixed objects, with the exception of frames otherwise mentioned in those specifications, shall be separated from the concrete pavement by a joint filler of the same thickness and character as hereinbefore specified for expansion joints, which joint filler shall extend through the entire thickness of the pavement. Said joint filler shall be placed in such a manner as to form a square whose sides will be fifteen (15) inches from the upper outside edges of the frames. • Furnishing all labor, equipment, and materials for installation of said expansion joints. Load transfer devices and reinforcing steel shall not be paid for directly, but will be considered incidental to the construction of the Portland Cement Concrete Pavement. CONTRACTION JOINTS: Sawed contraction joints or other type of contraction joints which may be approved by the Engineer, shall be placed throughout the entire improvement across the concrete pavement at right angles to the center thereof at intervals of twenty-five (25) feet between expansion joints and in accordance with the detail shown on plans. Furnishing all labor, equipment, and materials for the installa- tion of said contraction joints including dowel bar assembly shall not be paid for directly, but will be considered incidental to the con- struction of the Portland Cement Concrete Pavement. - 5 - ,1' 6.1 MIXING AND PLACING CONCRETE: Concrete shall be mixed and placed in accordance with the requirements of Section 408 of the "Standard Specifications", insofar as the same may apply. While being placed the Is honeycomb shall be vigorously sliced and spaded to eliminate voids or honeycomb pockets. The concrete shall be especially well spaded and tamped against forms and bulkheads. The concrete shall be struck off, so that the upper surface shall conform to and be sufficiently higher than the contour herein specified for the upper surface of the finished pavement, to give the specified thickness of pavement herein required. The strike board shall be moved forward with a combined longitudinal and transverse motion, and so manipulated as to tamp the concrete thoroughly. A slight excess of material shall be kept in front of the cutting edge at all times. The entire area of the pavement shall be struck off and tamped, so executed as to insure maximum compaction. FINISHED CONCRETE: After the tamping has been completed, the pave- tpent shall be rubbed smooth of all ridges and depressions and brought to a true and even surface by the use of wooden floats. A split float, shaped on the under side to conform to the countour of the pavement, shall be used for finishing the concrete on both sides of the longitudinal joints, hereinbefore specified, The edges adjoining the transverse expansion joint and the form, shall be tooled with an edging tool, having a radius of one -quarter (k) inch. After the floating has been completed, the surface of the pavement shall be tested with a notched straight edge, ten (10) feet in length. This straight edge shall be placed over the transverse joints and be- tween the same at frequent intervals, parallel to the center line of the pavement and moved across from side to side. Any variation in excess of one-eighth(1/8) inch above or below the general established contour of the pavement shall be rubbed with a long handled float and • the irregularities corrected until the straight edge shall show a bearing for its entire length. Workmen shall not walk on freshly laid concrete and no one shall be allowed on the concrete after it has been worked into form and shape until it has entirely hardened. The entire surfacing of the concrete pavement shall be done from a bridge, not less than one (1) foot in width which shall not come in contact with the concrete pavement at any point. Two (2) of said bridges shall be provided for each concrete mixing gang. Two bridges shall be maintained in constant readiness to be immediately moved into position, to provide access for finishing, tooling and edging joints, adjusting filler and refinishing damaged portions of the finished surface. PROTECTION AND CURING: Protection and curing shall comply with the requirements of Section 408 of the "Standard Specifications". J STORM SEWERS For the purpose of carrying off storm waters from the surface of the pavement herein provided to be constructed, storm sewers of clay sewer pipe or concrete sewer pipe shall be laid as hereinafter specified. • Said sewers shall be laid in open trenches in the ground in such manner as to conform to the elevations, lines and grades hereinafter specified in accordance with the requirements of Section 603 of the "Standard Specifications," and shall be designated as Storm Sewers, Type 3. The pipe used in the construction of said sewers shall be of the type known as "Bell and Spigot" having an internal diameter of 8 & 10 inches. Where required for connections from catch basins or manhole - catch basins, 8" "Y" branch shall be furnished and set in said sewer. The material excavated shall be kept compactly along the sides of the trenches and shall be backfilled as soon as practicable in order to occasion the least possible inconvenience to the public in the use of the street or alley as the case may be, but prior to said backfilling and immediately after the laying of the pipes, bank sand shall be carefully packed under, around and over the pipes in such manner as to compactly fill the trenches to a depth of twelve (12) inches above the top of the pipes. Where material excavated is not such as can be readily compacted in said trenches, same shall be replaced with bank sand, as directed by the Engineer. The open and unconnected ends of said sewers shall each be securely closed with a salt glazed, vitrified tile disc and sealed in the manner specified for joints between pipes. BASIS OF PAYMENT: This work will be paid for at the contract unit price per lineal foot for Storm Sewer, Type 3, of the diameters specified, measured in place, which prices will be payment in full for all trench excavation, backfilling with excavated material or bank sand, and for all labor, materials and equipment, including "Y" branches, to complete the installation of the sewer, in place, including connections to existing sewers. 1-70 Alley Pavinq MANHOLE -CATCH BASINS AND CATCH BASINS Catch basins shall be constructed of hard burned, sewer brick or concrete block. Said Catch basins shall be cylindrical in shape having an internal diameter of forty-eight (48) inches at the bottom and up- ward to a point thirty (30) inches below the top of masonry and shall then be uniformly drawn in to twenty-four (24) inches at the top of the masonry, to fit the iron cover hereinafter specified to be fur- nished and set on the walls of said catch basins. Said catch basins shall have walls eight (8) inches thick, for brick, and five (5) inches thick for concrete block. The brick or block used in the construction of said catch basins shall be laid in a mortar -composed by volume of one (1) part of Portland Cement and two (2) parts of clean, sharp sand mixed with sufficient clean water to give proper plasticity. The masonry joints shall be neatly pointed and made secure against leakage. Said catch basins shall rest on a .concrete bottom, six (6) inches in thickness, composed of Class X Con- crete conforming to the requirements of Section 52 of the "Standard Specifications", or precast reinforced concrete slabs not less than twelve (12) inches in width and four (4) inches in thickness. The said bottom shall be circular in form and the diameter shall be such that the walls of the catch basin shall rest entirely on the base. The eleva- tion of the bottom shall be determined by the Engineer. Said catch basins shall be connected.with the sewer now existing, or herein provided to be constructed, as the case may be, in and along the center lire of said alley. Said catch basins shall be connected with the sewer aforesaid by means of clay or concrete sewer pipe, having an internal diameter of A inches. • Said catch basin connection shall start in an 84f tayn branch of the quality and laid in the manner required for storm sewers, which "Y" branch shall be set in said sewer at a point eight (8) feet in advance of the vertical axis of the catch basin measured along and in the down, stream direction of the sewers. The pipe shall be laid true to line and grade and the connection shall enter the catch basin through the wall thereof at a point not less than two (2) feet ahove the top of the bottom of said catch basin. The pipe entering the catch l?asins through the wall thereof, shall be a half -trap of $R` internal diameter. Cost of furnishing and installing said half -trap shall be included in contract unit price for "Catch Basins". Method of laying pipe and backfilling same shall comely with re- quirements for "Storm Sewers". Said catch basins shall be equipped and fitted with a circular cast iron frame provided with a tight fitting perforated lid. Said lid shall contain forty (40) perforations of substantially si--�d lar size and shape and weigh one hundred twenty (120) pounds. The total area of said • 3) 4-65 • :.#/� .07 Alley Paving perforations shall be forty-three percent (43%) of the total area of said lid.. Said lid shall be supported upon a circular flange or pro- jection cast upon the inside of said circular frame, in such manner as to bring the upper surface of said lid, when in place, to the same elevations as the top of the walls of said circular frame. Said circular frame shall weigh two hundred seventy (270) pounds, be of two piece construction, be fifteen (15) inches high and have an internal diameter of twenty five (25) inches at the base and twenty three (23) inches at the top thereof. The edges of the frame and lid, where same adjoin each other when in place, shall be machine turned in such manner as to leave said edges smooth and be so shaped that said lid shall tightly fit into said frame so as to permit no play between them. Said catch basin frame herein provided to be furnished and set, shall rest on the walls of the catch basin and shall be imbedded in a mortar of the quality herein required for walls in said catch basin. All cast iron used in making said cover shall be Gray Iron con- forming to the Specifications for Gray Iron Castings, A.S.T.M. Designation: A48, Class 20. BASIS OF PAYMENT: This work will be rid for at the contract unit price for "Catch Basins" and for " inch Storm Sewers, Type-3" which prices will be payment in full for all excavation, for backfilltng with excavated material or with bank sand, and for all labor, equipment and material, including cast iron frame and lid, to complete the installation of catch basins and connections to sewer. 1- 70 M A N H O L E S Manholes shall be built of hard burned sewer brick, or concrete • block upon the existing sewer or the sewer hereinbefore provided to be constructed and shall be located at points hereinafter specified. Said manholes shall be cylindrical in shape having an internal diameter of forty-eight (48) inches at the upper surface of the base and upward to a point thirty (30) inches below the top of masonry, and shall then be uniformly drawn in to twenty-four (24) inches in inter- nal diameter at the top of the masonry, to fit the iron frame herein- after specified to be furnished and set on the walls of said manhole. The walls of said manhole shall rest upon the base thereof without offsetting and shall be eight (8) inches thick, for brick, and five (5) inches thick for concrete block. The brick or block used in the con- struction of said manhole shall be laid in a mortar composed by volume of one (1) part of Portland Cement and two (2) parts of clean sharp sand mixed with sufficient clean water to give proper plasticity. The masonry joints shall be neatly pointed and made secure against leakage. The base of said manhole shall begin at a point five (5) inches below the outside bottom of the sewer hereinbefore specified and shall extend upward to said outside bottom and along the sides of said sewer to a point midway between the top and bottom of said sewer. Said base shall be"circular in form, and the diameter shall be such that the walls of the manhole shall rest entirely on the base and shall be constructed of Class X concrete conforming to the requirements of Article 504.08 of the "Standard Specifications." That portion of the upper half of the sewer included in said manhole shall be neatly removed, leaving the lower half thereof to form the invert of the manhole. . Said manhole shall be equipped and fitted with a circular cast iron frame, closed lid, of the type hereinafter specified. BASIS OF PAYMENT: This work will be paid for at the contract unit price for Manhole with Cast Iron Frame and Closed Lid, which price will be payment for all excavation, installation of that portion of sewer pipe or fitting within the walls of manhole, construction of manhole including cast iron frame and lid, and backfilling with excavated material or bank sand. 4-70 CAST IRON FRAMES AND LIDS The Cast Iron Frames and Lids to be furnished with the catch basins or manholes to be constructed under this contract shall be Gray Iron Castings conforming to the Specifications for Gray Iron • Castings, A.S.T.M. Designation: A 48, Class 20, and shall conform to the following requirements: TYPE-1 FRAME: For all paving surfaces, other than concrete, catch basins or manholes shall be equipped and fitted with a circu- lar cast iron frame, hereinafter referred to as a Type-1 Frame, and a tight fitting open or closed lid. Said circular frame shall weigh three hundred ninety (390) pounds, be of one piece construction, be nine (9) inches high and have an internal diameter of twenty-four (24) inches at the base and twenty-three (23) inches at the top there- of. The edges of the frame and lid, where same adjoin each other when in place, shall be machine turned in such manner as to leave said edges smooth and be so shaped that said lid shall tightly fit into said frame so as to permit no play between them. Said frame herein provided to be furnished and set, shall rest on the walls of the catch basin or manhole and shall be imbedded in a mortar of the quality herein required for walls in said catch basin or manhole. TYPE-5 FRAME: For concrete pavements, catch basins or manholes shall be equipped with a circular cast iron frame, hereinafter re- ferred to as a Type-5 Frame, and a tight fitting open or closed lid. Said circular frame shall weigh two hundred seventy (270) pounds, be of two piece construction, be fifteen (15) inches high and have an internal diameter of twenty-five (25) inches at the base and twenty-three (23) inches at the top thereof. The edges of the frame and lid, where same adjoin each other when in place, shall be machine turned in such manner as to leave said edges smooth and be so shaped that said lid shall tightly fit into said frame so as to permit no play between them. Said frame herein provided to be furnished and set, shall rest on the walls of the catch basin or manhole and shall be imbedded in a mortar of the quality herein required for walls in said catch basin or manhole. OPEN LID: The open lid shall contain forty (40) perforations of substantially similar size and shape and weigh one hundred twenty (120) pounds. The total area of said perforations shall be forty three per cent (43%) of the total area of said lid. CLOSED LID: The closed lid shall weigh one hundred fifty (150) pounds. BASIS OF PAYMENT: No payment will be made for this item where it is included in the cost of the structure to which it pertains. Where this item is not included in the cost of the structure, it will be paid for at the contract unit price each for Cast Iron Frames with Open or Closed Lids. Cost of installing said frames and lids shall be included in price bid for adjustment or reconstruction of catch basins, manholes or valve vaults upon which they are to be placed. 3-67 Z And that the estimate of the cost thereof, including labor., materials and all other lawful expenses attending the proceedings for making said improvement and the cost of making and collecting the assessment therefor as provided by law, and as made by the Engineer of the Board, amounting in the aggregate to $21,221.50 and itemized as follows: ESTIMATE OF ENGINEER OF BOARD OF LOCAL IMPROVEMENTS To the Board of Local Improvements of the City of Evanston: Pursuant to a Resolution of the Board of Local Improvements of the City of Evanston, heretofore adopted, providing that the public alley in the block bounded on the north by Davis Street, on the south by Grove Street, on the east by Fowler Avenue and on the west by McDaniel Avenue, in the City of Evanston, County of Cook, State of Illinois, be improved by grading, constructing necessary storm sewers and drainage structures, and paving to a width of fifteen (15) feet with a Portland Cement Concrete pavement eight (8) inches thick. Said improvement to be constructed in detail as specified in aforesaid Resolution. I herewith submit an estimate of the cost of such improvement as described in said Resolution, including labor, materials and all other lawful expenses attending the proceedings for making said improvement and the cost of making and collecting the assessment therefor as provided by law, viz: • ESTIMATE OF COST 307 cu. yds. of Special Excavation @$ 4.50 $ 1,381.50 1090 sq. yds. of Portland Cement Concrete Pavement, eight (8) inches thick, laid complete in place @$ 8.50 9,265.00 520 tin, ft. of Storm Sewer, Type-3, 8" diam. @$ 6.25 3,250.00 225 lin. ft. of Storm Sewer, Type-3, 10" diam. @$ 7.00 1,575.00 2 each Manhole -Catch basin with Type-5 Frame and Open Lid, Complete in place @$375.00 750.00 F 71 Page 2 - Estimate of Cost continued: • 2 each Catch basin with Type-5 Frame and Open lid, complete in @$375.00 750.00 place $ 1 each Manhole with Type-1 Frame and Closed lid, complete in place @$375.00 375.00 25 sq. yds, Pavement Replacement - Entire @$ 10.00 250.00 425 cu. yds. Trench Backfill @$ 4.00 1,700.00 Cost of Engineering Services. , . . . . . . 770.00 For Lawful Expenses, etc. , . , , . , , . , 1,155.00 TOTAL . . . . . . . . . . . . . . . . . $ 21, 221.50 RECAPITULATION Total Cost of Construction. . . . . . . . . $ 19,296.50 Cost of Engineering Services. . .$ 770,00 For Lawful Expenses, etc. . . . . 1,155.00 1,925.00 TOTAL COST OF IMPROVEMENT . . . . . . . . , $ 21,221.50 • I hereby certify that in my opinion the above estimate does not exceed the probable cost of the above proposed improvement and the lawful expenses attending the same. Engineer of the Board of LocrMp rovements of the City of Evanston 4-70