Loading...
HomeMy WebLinkAboutOrd 2111 10/22/1968 ro, ~ ~ ,~ t, x f (. ORDINANCE NO. 2. /1 J AN ORDINANCE PROVIDING FOR THE MAKING OF A lOCAL IMPROVEMENr IN AND FOR - THE VILLAGE OF IDUNT PROSPECT, COOK COUNTY , ILLINOIS BE IT ORDAINED BY THE PRESIDENT AND BOARD OF TRUSTEES OF THE VILLAGE OF MOUNr PROSPECT, COOK COUNI'Y, ILLINOIS: SEGrION.1: That a local improvement shall be made in the Village of Mount ~peQt" Cook County, Illinois, the nature, character, locality and description of whiel\1' -, improvement is as follows: That a system of concrete storm water sewers consisting of reinforced concrete pipe, inlets, manholes, and catch basins, together with removal and restoration of pavement surfaces, curbs, culverts, and all, other work necessary, required and specified by the plans, profiles, and specifications all corrpleted in place in the Village of Mount Prospect, Cook County, Illinois: shall be constructed in the following locations: LINE "A" Beginning at a point on the west side of Weller Creek and the south parkway of the proposed Grandon Lane; thence westerly along the south parkway of the proposed Grandon Lane to a point on the west parkway of Busse Road, at which point it shall intercept an existing 24" line, which extends to the south LINE "B" Beginning at and intercepting Line UN' on the east parkway of Busse Road and south parkway of the proposed Grandon Lane; thence north a distance of 143 feet; thence west to the west parkway of Busse Road, a distance of 77 feet, at which point it shall connect to an existing 54" line which e~ends to the north. LINE "en Beginning at and connecting to the existing 54" sewer line in the west parkway of Busse Road and rtmning westerly on the south half of the existing pavement on Bonita Avenue to the intersection of Bonita Avenue and Verde Drive. LINE liD'? Beginning at the existing head wall on the existing 54" storm sewer and ' located in an easement in the rear of lot 6 in block 1 of Hatlen Heights Subdivision, Unit No.1, also known as 1710 Bonita Avenue; thence westerly for a distance of approximately 1600 feet along an existing and proposed easement to the west proposed easement of Dana Point; thence north for a distance of approximately 400 feet along the proposed easement (on the west property line of Dana Point) to the north half of the existing pavement of Grindel Drive; thence west in the north half of the existing pavement on Grindel Drive to the intersection' of the east right of way line of Audrey Lane and Grindel Drive. LINE IJE" Begirining in an easement and connecting to the proposed Line liD" above, which easement lies on the north line of Hatlen Heights Subdivision, Unit No. 1 and running south in the east half of the existing pavement on Si-vik Street to a point in the north half of the existing pavement on Bonita Avenue; thence westerly along the north half of the existing pavement on Bonita Avenue to a point 121 feet west of the intersection of Bonita Avenue and Verde Drive, at which point it shall intercept an existing 3011 line, 't'lhich 30" line extends to the west along Bonita Avenue. LINE "Fll Beginning at and connecting to an existing 30" line at the intersection of Bonita Avenue and Hatlen Avenue; thence southerly along the west half of the existing pavement on Bonita Avenue to the north parkway of Lincoln Road; thence westerly for a distance of approximately 500 feet along the north ' parkway of Lincoln Road to a point on Lincoln ROad and Meier Road, at which point it shall intercept an existing 16" drain tile. LINE "Gu Beginning at and connecting to the proposed Line !IF" above in the west half of the existing pavement on Bonita Avenue and running westerly for a distance of approximately 540 feet in the south half of the existing pavement on Audrey Lane to the intersection of Audrey Lane and Audrey Court . ~, {~ ..-." .. ! !'!. l', LINE ,,"a" B~gi~nt a,t aridcbnne~ting t6~ existing 18" line in the lnte7;'lS~ction or~stwoooLane and; ~tl~ri~v$riut:t;..thence southerly in the west half of the:"e,as~ingpave~ntoh ~Stwood Lane to a point 1ri the north par~ cir,Ltncoln,' R6a4,~d~stwood ~; thence westerly' along the north parltway of Linc61rt.R.o~ to approximately the intersection of the west l1ne of Beverly I..an~ ,and Lincoln Road. ' LINE illli Be~; at and connecting(~4'~, eXisting 211t line ,in the, 'SoUth p~,Of Hatlen Avenue anQtheJ~esterly line of+ot 58 ~d' the east~r1Y line of lot 59 in Hatleri ~ights Subq1vis~on) Unit, ,No. 4 extended;...thence southerly ,alcng~?id eastefllY, J.1ile "or lot.59 and westerly line of lot 58 to tl:1e ~a.r, lot line o,f saiq lots 58 ~d 59, a distance of approximately 147 re~t. southerly of th~ south line of Hatlen Avenue in the aforesaid stibd1 vision. , - LINE "J" Beginning at and connect:fug, to an e~:1st::tng 18" If.rie located at, a point in the north parkway o~ tirieo1n Road and 60 "feet west of the west line of the intersect:ton pi' Hatlep A'Venue an9 Lincoln Road; thence we~t;erly along the northpa:r>kway of Lincoln RQad to a point 628 feet west of the intersection of ,Hatlen Avenue at'ld Lincoln; Road, as shown on the plans and deta.tlsattached to the ,~aia ResolUtion, on file i1"f the office of the secretary of the Board of Local Improvements of the Village of Mount Prospect.. Said sewers are to be of inteh:1aJ.' d1aneter of 10" ~ 12", 15", 18", 2'4", 30",48", 54" and, 60" at the seVeral locations as shown on the aforesaid plans. 'rtie properties to be benefited both directly and indirectly rill within the following legal descriptions: Parcel A: Hatlen Heights, a subdivision of the Village of Mount Prospect, illinois, which Subdivision is located in the West 1/2 of the Northeast 1/4, Section 10, Township 41 North, Range 11, East of the Third Principal Meridian, Cook County, Illinois, and the South 1/2 of the East 1/2 of the Northeast 1/4, Section 10, Township 41 North, Range 11, East of the TbirdPrincipal Meridian, Cook eounty, Illinois. The outfall of said storm sewer system shall be located in the proposed right of way of Grandon Lane, located in the proposed subdivision of Crandon Manor, a subdivision of part of the South 1/2 of the Southwest 1/4, of the Northwest 1/4 of Section 11, Township 41 North, Range 11, East of . the Third Principal Meridian, Cook County, Illinois. Parcel B: The entire East 1/2 of the Northwest 1/4, Section 10, Township 41 North, Range 11, East of the Thlrd Principal Meridian, Cook County, illinois. Parcel C: The west 1/2 of the Northwest 1/4, Section 10, Township 41 North, Range 11, East of the Third Principal Meridian, eook County, Illinois, excluding therefrom those properties incorporated in the Village- of Arlington Heights. Parcel D: The East 1/2 of the Southwest 1/4, Section 10, Township 41 North, Range 11, East of the 'lhird Principal Meridian, eook County, Illinois, excluding therefrom those properties incorporated in the Village of Arlington Heights. Parcel E: The entire West 1/2 of the Southwest 1/4, Section 10, Township 41 North, Range 11, East of the Third Principal Meridian, eook County, lllinois. Parcel F: That part of the East, 1/2 of the So~theast 1/4, Section 9, Township 41 North, Range 11, East of the 'Ihird Principal Meridian, Cook eounty, illinois, lying East of the East right of way line of Arlington Heights Road, excluding' therefrom those properties incorporated in the Village of Arlington Heights. Parcel G.: That part of the West 1/2 Of the Northwest 1/4, Section 11, Township 41 North, Range 11, Cook County, Illinois lying'ltJest of the West line of Weller Creek. . - 2 - .'-' ...-, ,- f .~. SPECIFICATIONS SPECIAL PROVISIONS A. GENERAL Scope of Work The work to be included under this contract 'shall be the furnishing of labor, tools, and equiPment and the furnish- ing, installing, delivery and testing of all materials re- quired to completely install improvements to the Storm Sewer System, consisting of storm sewer pipe and appurten- ances, complete in place, as shown on the drawings and as hereinafter specified. All excavating, backfilling and disposal of any excess mat- erial is included. Location of Project The Storm sewers are to be constructed in Hatlen Heights Subdivision and The Proposed Cranden Manor Subdivision in the Village of Mount Prospect, Illinois. Plans The drawings applicable to the work to be performed under this contract and which are referred to in this document as the plans or as the contract drawings, are numbered and described as followss VILLAGE OF MOUNT PROSPECT, ILLINOIS HATLEN HEIGHTS SUBDIVISION SPECIAL ASSESSMENT NO. 70 STORM SEWERS Sheet No. 3 to 9 Description Title Sheet & Location Maps Plans and Profiles 1 and 2 10 and 11 General Notes & Details 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 January 3, 1966, shall govern the construction of the proposed im- provement designated as Hatlen Heights Subdivision, Special (1 ) Section l-C ,-,.. .-.." - Assessment No. 70, Storm Sewers. The ~ollowing special provisions supplement these specif- ications, and in case of conflict the'special provisions shall take precedence and shall govern. B. UNIT PRICE CONSTRUCTION ITEMS Item Nos. 1 thru 15 - Reinforced Concrete Pl~e Sewers These items include the furnishing and installation of re- inforced concrete sewer pipe of various classes at the loc- ations and to the lines and grades designated on the Con- tract Drawings in compliance with the following listed spec- ifications: Description Pipe used for storm sewers shall be reinforced concrete of various classes. General Where reference is made to an ASTM or ASSRO designation, it shall be the latest revision at time of call for bids, ex- cept as noted on the plans. Pipe eight (8) inches in diameter and larger shall be furn- ished in units of not less than three (3) feet. Materials: Pipe Materials The type, class and strength of pipe to be used shall be as shown on the plans. Concrete Pipe, Reinforced Reinforced concrete pipe shall conform to ASTM Designation C76. For pipes 30 inches or. more in diameter~ the length of the unit shall be less than six (6) feet. Bituminous Joints for Storm Sewers Pipe ends designated for bituminous joints shall conform to ASTM Designation C76. Bituminous material shall consist of a homogenous blend of bitumen, inert filler~ and suitable sol- vent approved by the engineer. Item No. 16 - Manholes, Type "B" This item provides for the construction of manholes cast-in place, in conformance with the detail shown on the drawings. (2) Section 1-C ~ ,-, "~, r Item No. 17 - 48" Manholes. T;wpe "A" This item provides for the construction of fuanholes made of pre- cast concrete units in conformance with the detail shown on the drawings. Item No. 18 - Manholes to be Reconstructed This item shall consist of cleaning, mortaring, trimming or exist- ing sewer stubs, pouring of concrete bench and tieing in the new storm sewer pipe. Item No. 19 - Catch Basin, Type "A" This item prOVides for the construction of catch basins made of pre-cast concrete units in conformance with the detail shown on the drawings. Item No. 20 - Gatch Basin, Type "C" This item provides for the construction of catch basins made of pre-cast concrete units in conformance with the detail shown on the drawings. Item No. 21 - Catch Basin, Type lIC" (Special) This item provides for the construction of a special catch basin made of pre-cast concrete units in conformance with the detail shown on the drawings. Item No. 22 - Inlet, Type "A", This item provides for the construction of inlets made of pre- cast ooncrete units in conformance with the detail shown on the drawings. Item No. 23 - Frame and Lid, Type 1 (Closed Lid) This item includes the furnishing and installation of cast iron frames and lids at the locations and to the grades deSignated on the Contract Drawings or by the Engineer. Item No. 24 - Grate, Type 8 This item includes the furnishing and installation of cast iron grates at the locations and to the grades designated on the Contract Drawings or by the Engineer. Item No. 25 - Frame and Lid, (Neenah - R3246) This item includes the furnishing and installation of cast iron frame and lid as specified (or approved equal) at the locations and to the grades designated on the Contract DraWings or by the Engineer. '\ ( :3) Section l-C .~ . -" ..-, ?~ Item No. 26 - Type 5 (Modified) Curb and Gutter Removal and Replacement Tijis item shall include the removal of damaged, settled or inter- ferring combination concrete curb and gutter, and the replacem'ent of the Oomblnatlon concrete curb and gutter in compliance ~ith the state of Illinois Standards and as designated by the Engineer. Item No. 27 - Sidewalk 'Removal Tliis item shall include the removal and disposal of concrete side- walk interferring with the construction of, the storm sewer or the combination curb and gutter removal and replacement. Item No. 28 - Portland Cement Concrete Sidelfalk (5") This item shall include all material, labor and equipment to furn- ish and place as dfrected by the Engineer. Thickness shall be five (5) inches. Item No. 29 - Surface Removal and Replacement DESCRIPTIONs This item shall consist of the removal and replacement of bitum- inous concrete pavement or driveway surface at the locations shown on the plans or as directed by the Engineer. METHOD OF WORK: The Engineer shall mark all locations where the bituminous sur- face is to be removed. The limits of the removal shall be made in a neat workmanlike mannera however, the edge will not have to be saw-cut. After installation of the storm sewer and trench backfill, the base course surface and edges of the remaining bit- uminous concrete shall be prime coated, and then place a minimum of ,.. thick layer of bituminous concrete, Sub-Class I-II on the exposed base. The finished surface shall be flush with the surface of the adjoining bituminous concrete surface. The bitum- inous concrete shall be compacted to a minimum 93 percent of the maximum possible density of a voidless mixture with a roller or mechanical compaotor. / METHOD OF MEASUREMENT AND BASIS.OF PAYMENT. This work shall be measured in square yards replaced in confor- mance with the detail shown on the drawings, and shall be paid for at the contract unit prive per square yard for SURFACE RE- MOVAL AND REPLACEMENT. which price shall be payment in full for all necessary labor, materials and equipment. Item No. 30 - Reinforced Concrete Headwall for 60 Inch Pipe. Tl):ts item includes the furnishing of Class "X" Concrete and Re- inforcing Bars installed at the location shown on the Contract Drawings, and all necessary labor, material and equipment. , (4) . Section 1-C ,- ...-. ,,- Item Nos. & tl Diameter or less. All work and materials required to adjust sanitary sewer or water service I1nes which interfere with proposed construction shall con- form to the state of Illinois "Standard Specifications for Road: and Bridge Construction", Section 74. The contract unit prices shall include new pipe of the required material and diameter com- plete in place ready for use. Item No. 33 - Cast Iron Pipe and Fittings and Appurtenance~ All work and materials required to adjust water mains which inter- fere with proposed construction shall conform to State of Illinois "Standard Specifications for Road and Bridge Construction". The contract unit price per pound shall include cutting, de-watering, sterilizing, blocking tie bars and clamps, backfilling and all other work and material required to adjust the water mains, com- plete in place and ready for use. Item No. )4 - Grade 8 Crushed Stone Backfill Granular materials used for trench backfill under pavements, dri- veways and sidewalks and at other locations designated by the Eng- ineer, shall consist of State of Illinois Grade 8 crushed stone. Payment shall be made at the contract unit price per cubic yard, and the quantity shall be computed in accordance with the Special Provisions and Contract Drawings. . Item No. 35 - Gravel Cradle GENERAL: Gravel cradle, conforming to the details indicated on the plans shall be constructed prior to the placement of all storm sewer pipes, except when omission is ordered by the Engineer. Gravel cradle shall be required on storm sewers where indicated on the Drawings or Special Provisions, or where ordered by the Engineer. Material for gravel cradle shall be Grade 8 crushed stone. MEASUREMENT: Measurement of gravel cradle shall be made by the cubic yard in place, based on the quantities per lineal foot for the respective size of conduit, as shown on the plans. PAYMENT: Payment for gravel cradle shall be made at the contract unit price per cubic yard for Grade 8 crushed stone. The contract unit price for gravel cradle shall also include the cost of re- moving and disposing of the material replaced by the gravel cradle. (5) Section i-C -, ~ - GENERAL SPECIFICA TIONS SECTION I - EXCAVATION AND BACKFILL FOR UNDERGROUN:Q CONDUITS DESCRIPTION For the purpose of this project, underground conduits shall be considered storm sewer pipe as indicB,ted on the plans. Wherever the term "pipe" or "pipe line" is used it shall mean storm sewer. Excavation and backfill shall include all excavation, baokfilling, compacting, disposal of surplus material, restoration of all disturbed surfaces except seed- ing and sodding, and all other work incidental to the construction of trenches, including any additional excavation which may be required for manholes or other structures forming a part of the pipe lineo CONSTRUCTION DETAILS BITUMINOUS SURFACE REMOVAL Along the proposed pipe lines as indicated on the plans, the contractor shall remove the surface materials only to such widths as will permit a trench to be excavated which will afford sufficient room for proper efficiency and proper oonstruction. Where sidewalks, driveways, pavements and curb and gutter are encountered, care shall be taken to protect such against fracture or disturbance beyond reasonable working limits. EXCAVATION BY HAND OR MACHINE Where working space will permit, trenches may be excavated by machine, provided that by so doing, public and private improvements will not be subjected to an unreasonable amount of damage. If, however, excavation by machine methods cannot be made without material damage being done to public and private improvements, hand exoavation shall be employed. ~IDTH OF EXCAVATION ~A) The bottom width of the trench at and below the top of the pipe and inside the sheeting and bra.cing, if used, shall not exceed the following widths: Max. Width at Max. Width at Pipe Size Top of Pipe Pipe Size Top of Pipe 8" 29 - 2" 30" 4' - 5" 10" 2' - 4" 33" 4' - 9" 12" 2' - 7" 36" 5' - 8" 15" 2~ - 10" 39" , 6' - 0" 18" 3' - 2" 42" 6' - 3" 21" 3' _ 6" 48" 6' - 10" 24" 3' - 9" 54" 7' - 5" 27" 4' - I" 60" 8' - 0" 66" 8' - 7" (1) Section 2. ~ ... ~, ,- WIDTH OF EXCAVATION (continued) (B) Trenoh bracing shall be employed, if neeessaxy to maintain these maxi~ widths of trench. The bottoM on the trench excavation shall conform to the details shown on the plans. EXCAVA TION BELOW GRADE In eases where the excavation is carried beyond or below the lines and gre,des given by the engineer, the contrector shall, at his O\m expense, refill all such excavated space with suitable granular material. SHORT TUNNELS In 80.e instanoes, trees, fire hydrants, sidewalks and other 9bstruetions may be enoountered, the proximity o~ which may be a hindrance to open cut excava- tion. In sueh eases, the contractor shall excavate by means of short tunnels in order to protect such obstructions against dama6e. Such short tunnel work shall be considered incidental to the construction of the pipe line and shall not be grounds for extra payment or payment for tunnel work. PILING EXCAVATED MATERIAL All excavated material shall be piled in a manner that will not endanger the work and that will avoid obstructing sidewalks and driveways. Fire hydrants under pressure, valve pit covers, valve boxes, curb stop boxes, or other utilit,y controls shall be left unobstructed and accessible until the work is completed. Gutters shall be kept clear or other satisfactoxy provisions made for street drainage. Natural watercourses shall not be obstructed. BARRICADES. GUARDS AND SAFETY P!WVISIONS To protect persons from injury and to avoid property damage, adequate barricades. oonstruotion signs, torches, red lanterns and guards as required shall be placed and maintained by the contractor at his expense during the progress of the con- struction work and until it is safe for traffic to use the roads and streets. All material piles. equipment and pipe which may serve a,s obstructions to traffic shall be enclosed by fences or barricades and shall be protected by proper lights when the visibility is poor~ The rules and regulations of the local authorities respecting safety provisions shall be observed. STRUCTURE PROTECTION Temporary support, adequate protection and maintenance of all underground and surface structures, drains, sewers and other obstructions encountered in the progress of the work shall be furnished by the contractor at his expense and under the direction of the engineero The structures which may have been dis- turbed shall ,be restored upon completion of the work. (2) . Section 2-C -., "'....-...., ,'- PROTECTION OF PROPERTY AND SURF' ACE STRUCTURES Trees, shrubbery, fences, poles and all other property and surfaoe struotures shall be protected during construction operations unless their removal for pur- poses of construotion is authorized by the engineer. Any fences, poles or other man made surface improvements which are llloYed or disturbed by the contractor shall be restored to the original condition, after construotion is completed, at the contractor's expense. Any trees, shrubbery or other vegetation which are approved for removal or ordered for removal by the engineer in order to facilitate construction operations shall be removed completely, including stumps and roots, by the contractor. Responsibility for any dame~e or claims for damage caused by construction operations to shrubbery or other landscape improvements which were not authorized for removal by the engineer shall be assumed by the oontraotor. Settlement of any damage or claims for damage shall be made by the contractor as soon as possible and in a manner satisfacto~J to the engineer. CAUTION IN EXCAVATION The contraotor shall proceed with caution in the excavation and preparation of the trench so that the exact location of underground struct1rres, both known and unknown, lllay be determined, and he shall be held responsible for the repair of such structures when broken or otherwise dliLll!aged by hime DEVIA'rrONS OCCASIONED BY OTHER STRFCTURSS OR UTILITIES Wherever obstructions are enoountered during the progress of the work and inter- fere to such an extent that an alteration in the plan is required, the engineer shall have the authority to cha~ge the plans and order a deviation from the line and grade or arrAnge with the owners of the structures for the removal, reloca.- tion or reconstruotion of the obstruotions. Where gas, water, telephone, elec- trioal or other existing utilities are an impediment to the vertical or horizontal alignment of the proposed pipe line, the engineer shall order a change in grade or alignment or shall direct the contractor to arrange with the owners of the utilities for their removal. If a Change in grade of an existing sanitary sewer is necessary, the engineer will direct as to the new revised line and grade~ Cost of removal, modifioation and/or replacement of existing structures or utili- ties shall be borne by the Owner; however, delay caused in such removal shall not be cause for claim for damages by the contractoro INTERRUPTION TO UTILITIES The contractor shall take all reasonable preoautions against dama.e;e to existing utilities. However, in the event of a break in an existing watermain, gas main, sewer or underground cable, he shall immediately notify a responsible official from the organization operating the utility interrupted. Tl"te contractor shall lend all possible assistance in restoring service and shall assume all oosts, charges or claims connected wit~ the interruption and repair of sueh servioes. ( 3) Section 2-C ~" ~ ,C'~ MAINTENANCE OF IrRAFFIC AND CLOSING OF STREETS The contractor shall carry on the work in a manner which will cause a minimua of interruption to traffic, and may close to through travel not more than two consecutive blocks, including the cross street intersected. Where traffic must cross open trenches, the contractor shall proTide suitable bridges at street intersections and driveways. The contractor shall post, where described by the engineer, suitable signs indicating that a street is closed and necessary detour signs for the proper maintenance of traffio. Prior to closing of any streets, the contractor shall notify responsible municipal authorit~es. CONSTRUCTION IN ~SEMENTS In easements aeross private property, the contractor shall confine all opera- tions in the easement area and shall be responsible and liable for all d~ outside of the easement area. Trees, fences, shrubbery or other type of surface improvements located in easements will require protection during construction. The provisions of PROTECTION OF' PROPERTY AND SURFACl!: STRUCTURES shall apply to all easement areas as well as to public right-of-waYe Precautions shall be taken by adequate sheeting or other approved method to prevent any eave-in or subsidenee beyond the easement limits or damage to improvements wi thin the easement.. In general, the easement area is intended to provide reasonable accesf;! and working area for efficient operation by the contractor. Where easement space for efficient operation is not provided, the contractor shall be responsible for organizing his operations to perform within the restrictions shown on the plans. When requested, the Owner shall ~e available to the contraotor a copy of the eonstruction ease- ments. WATER SOAKING Water required fo~ water soaking - hydrants, he shall make application to the munioipal ordinances, rules, shall be furnished from hydrants at If the contraotor desires to use water froll to the proper authorities, and shall oonform or regulations concerning their use. Water the Owner's expense. Fire hydrants shall be accessible at all times to the Fire Department. No material or other obstructions shall be placed closer to a fire hydrant than per- mitted by municipal ordinances, rules, or regulations, or within fiYe (5) feet of a fire hydrant, in the absence of such ordinances, rules, or regulationso Surface depressions resulting from backfill subsidence caused b.1 water-soaking shall be refilled to the satisfaction of the engineer. UNSUITABLE BACKFILL JVIATERl!L ~, Where there is a deficiency of suitable backfill material due to a rejection of part or all of the excavated material as unsatisfactory backfill purposes, the contractor shall furnish satisfactory baokfill material waste from trench excavation in other looations or from other sources furnished by the contraotor.. Backfill furnished and disposal of unsatisfactory material under these circum- stances shall be paid for separately at the oontract unit price for "Grade 8 Crushed Stone Backfill", if ordered, or on an extra work basis if native material is usedo (4) Section 2-C ,.~-+, /...., ,,-, SECTION II - RESTORATION OF SURFACES GENERAL Restoration of surfaces shall include the removal of the existing surface, the disposal of surplus material, and the construction of new surfaces as indicated on the plans. The type of surfaoe restoration required shall be shown on the plans. HEi'vjOVAL OF PAVElviEr;YT, SIDEWALK, DRIVEWAY A~j) CURB Wherever the pipe is located alone or across an improved surface, the width of the trench shall be held as nearly as possible to the maximum width specified in Section I. Where concrete pavement, sidewalk, driveway or curbing is cut, the width of the cut shall exceed the actual width of the top of the trench by twelve (12) inches on each side or a total of two (2) feet. Exposed surfaces of Portland cement or asphaltic concrete shall be cut with a pavement saw be- fore breaking. Care shall be taken in cutting to insure that a straight joint is sawed. REPLACEfI"JENT OF PEm-l.<\NENT TYPE PAVEMENT, SIDEWALKS. nRlVEWA YS, CURBS, GUTTERS A'J'lD STRUCTURgS GENERAL The contractor shall restore (unless otherwise specified or ordered by the engineer) all permanent type pavements, sidewalks, driveways, curbs, gutters, shrubbery, fences, poles and other property and surface structures removed or disturbed during or 8S a result of construction operations to a condition which is equal in appearance and quality to the condition that existed before the work began. The surfaoe of all improvements shall be construoted of the same material and match in appearance the surface of the improvement which was re- moved. Where Grade 8 Crushed Stone Backfill is used, the restoration shall be made as soon as possible after the backfill has been eompletedo BITUMINOUS SURFACE-FLEXIBLE BASE The base replacement shall consist of Grade 8 Crushed Stone. Placing and compacting of the base course material she,ll conform to the methods described in the "Standard Specifications for Road and Bridge .construc- tion" for stone base courses. The surface replacement shall cO!lsist of a bituminous prime coat and a bitumi- nous modified plant mix surface oourse three (3) inches in thiokness oonforming to the Illinois Division of Highways "Standard Specifications for Road and Bridge Construction" requireml"nts for Bi tuminous Concrete Surface Course t Sub- class 1-11. ( 5) Section 2-C ~~.~ f~ ,-' , . CONCRETE SIDEWALKS. DRIVEWAYS. CURBS, CURBS AND GUTTERS Where necessary to remove and replace concrete sidewalks, driveways, curbs and curbs and gutters, replacements shall be made as follows: Concrete sidewalks, driveways, curbs and curbs and gutters shall be replaced with concrete meeting the applicable provisions of these specifications and having a compressive strength of not less than thirty-five hundred (3,500) p.s.i. at twenty-eight (28) days. Minimum thickness shall be five (5) inches for side- walks and six (6) inches for driveways. Curb or curb and gutter dimensions and cross-sections shall conform, as nearly as practicable with the existing installations. One-half (1/2) inch pre-formed expansion joints shall be placed at intervals not exceeding fifty (50) feet and at the junctions with existing work. Sidewalks shall be finished to match ex- isting adjacent sidewalk surfaces. unless otherwise specified or directed by the engineer. MEASUREMENT For payment purposes, the width of the remoTal and replacement of permanent type pavements, sidewalks and driveways shall be the specified maximum width at top of pipe plus two (2) feet. A tabulation in the plans indicates for payment purposes, the removal and replacement quantities per foot of length for the various pipe sizes. Additional removal and replacement, necessary be- cause the top of the trench is wider than the maximum specified width at top of pipe, shall be at the contractor's expense and not measured for payment. The length of the removal and replacement of permanent type pavements, driveways and sidewalks crossed by conduits shall be measured along the center of the pipe line, including manholes, over which the remoTal and replacement was made. Ad- ditional widths necessary at manholes and special structures shall not be meas- ured. The cost of such additional removal and replacement shall be included in the unit bid price for manholes and special structures. The length of curb or curb and gutter crossing a conduit shall be equal for pa,rment purposes to the specified maxi.um trench width at top of pie plus two (2) feet. Except as otherwise shown on the plans or directF,d by the engineer, payment quantities for sidewalks, driveways, curbs and curbs and gutters, removal and replacement, where such items are parallel or approximately parallel to the proposed pipe line, shall be included only when the distance from the edge of the trench (as determined from the assumed top of pipe trench widths shown on the plans) is less than two (2) feet from the edge of the sidewalk, driveway, curb or curb and gutter. Where the items are at a 6-reater distance from the trench, any damage shall be replaced at the contractor's expense. where side- walk parallel to a proposed pipe line is to be removed and replaced, the engineer ahalldetermine the extent of such removal and replacementc The contractor may elect to construct the conduit in a tunnel with the approval of the enc;ineer~ In suoh an event, he a~ll be compensated ~ payment of the amounts of driveways, Sidewalks, or curbs and gutters which have been measured for payment had open cut methods been employedo (6) Section 2-C ,.....~-~ ",~". ~. . DISposAL OF SURPLUS EXCAVATED MATERIAL ..,!-".>!' Surplus excavated material not needed for backfill shall be promptly r$moY&d from the site to looations provided by the contractor, or as designated by the engineer. The cost of removal and disposal or surplus e'Xea.Y8.ted Ilateri'als will ~. :.,::<.' r be inc~uded in the prices bid and no additional payment will be allowed, therefor. ~. CLEANING UP All surplus materials and all tools and telJlporary struotures shall be :Qemoved from the site by the contractor. All dirt, rubbish and excess earth f~m the excavation shall be hauled to a dump provided by the contractor and the: construo- tion site left clean and acceptable to the engineers at the earliest possible date. SECTION III - FmISHING AND CLEANUP FOR UNDERGROUND CO.J~mUITS CLEANtLP Before acceptance of underground conduits oonstruction, all pipes, manh~les, catch basins, fire hydrarits and other appurtenances shall be cleaned 0['a1l debris and foreign materialo Atter all baokfill has been completed, the ground surface shall be shaped to conform to the contour of adjacent surfaces. General cleanup of the ent;i.re con- struction area shall meet with the requirements of the VillageQ smTION IV - PIPE MATl';RIALS AND TESTING FOR SEWERS DESCRIPTION Pipe used for storm sewers shall be reinforced concreteo GENERAL Where reference is made to an ASTM or ASSHO designation, it shall be the latest revision at time of call for bids, except as noted on the plans. Pipe eight (8) inches in diameter and larger shall be furnished in units of not less than three (3) feeto MA TERIALS PIPE MATERIALS The type, class and strength of pipe to be used shall be as shown on the plans. CONCRJiiI'E PIPE, REINFORCED Reinforced concrete pipe shall conform to ASTM Designation C76. For pipes 30 inches or more in diameter, the length ot the unit shall be less than 6 feet. (7, ) Section 2-C ...~, ,-, BITUMINOUS JOINTS FOR S'r'ORN SEw'ERS Pipe ends designated for bituminous joints shall conform to ASTH Designation C760 Bituminous material shall cmlsist of a homogenous blend of bitumen, inert filler, and suitable solvent approved by the engineer. SECTION V - CONSTRUCTION DEITAILS SURVEY LINE A1"1:> GRADE ~...... .~ Survey line and grade control hubs at a fifty (50) foot maximum spacing and at a change in line and grade will be provided by the engineer. The contractor shall constantly cheek line and grade of the batterboarrls and the pipe and in the event they do not meet specified limits described herein- after, the work shall be immediately stopped, the engineer notified, and the cause remedied before proceeding with the work. SEWER PIPE LAYING Laying of sewer pipe shall be accomplished to line and grade in the trench only after it has been dewatered and the bedding has been prepared in accordance with Section I. Mud, silt, gravel and other foreign material shall be kept out of the pipe and off the jointing surfaces. All pipe laid shall be retained in position so as to maintain alignaent and joint closure until sufficient backfill has been completed to adequately hold the pipe in place. All pipe shall be laid to confirm to the prescribed line and grade shown on the plans, within the limits that follow. At least three batterboards shall be maintained in position during all pipe laying operations. Variance from established line and grade shall not be greater than one thirty- second (1/32) of an inch per inch of pipe diameter and not to exceed one-half (i) inch, provided that any such variation does not result in a level or reverse sloping invert; provided also, that V3riation in the invert elevation between adjoining ends of pipe, due to non-eoncentricity of joining surface and pipe interior surfaces, does not exceed one sixty-fourth (1/64) per inch of pipe diameter, or one half (if) inch maximum. The sewer pipe, unless otherwise approved b,y the engineer, shall be laid up grade from point of connection on the existing sewer or from a designated start- ing point. The sewer pipe shall be installed with the bell end forw8rd or up- grade, unless approved otherwise. When pipe laying is not in progress the forward end of the pipe shall be kept tightly closed with an approved temporary plug. (8 ) Seetion 2-C "'-""",:< t~ ,,- Wherever pipe sewers cross water mains, it is desirable if praoticable, that the pipe sewer be at least eighteen (18) inches above or below the water main. Where it is not practical to provide such a separation, care shall be taken to ascertain that the water main being erossed is in good sound condition and that no evidenoe and history of joint leakage is known in the existing water main in thsl,t vicinity. If any sucb evidence does exist, the water main shall be exposed at least ten (10) feet eacb side of the sewer pipe crossing, carefully examined under pressure and any defects shall be positively correctedo The Owner will arrange for examining and correcting any defects in the existing water mains, but the contractor shall cooperate in every way possibleo DEWA TERING Dewatering sufficient to maintain the water level at or below the surface of trench bottom or base of the bedding course, shall be accomplished pripr to pipe laying and jointing, if not prior to excavation and placing of the bedding. The dewatering operation, however accomplished, shall be carried out so that it does not destroy or weaken the strength of the soil under or alongside the trenoho The normal water table shall be restored to its natural level in such a manner as to not disturb the pipe and its foundation. PIPE JOINTING Type of joint to be used will conform to the requirements of bituminous joints for storm sewerso JOINT SEALER The elastic or mastic joint sealer shall be used in accordance with recommendations of the manufacturer. After each joint is sealed, it shall be wiped clean on the inside. JOINTING OF DISSIMILAR PIPES For dissimilar pipes where suitable adaptor couplings are not available, the joint- ing shall be aocomplished with a special fabricated coupling or concrete encasement as specified. SEWER LINE CONNECTIONS Sewer line connections to trunks, mains, laterals or side sewers shall be left uncovered until after an acceptance inspection has been made. After approval of the connection, the trenct shall be baokfilled as specified in Section 10 When existing drain tiles are encountered, the engineer must be notified prior to continuance of work. (9 ) Section 2-C '''~'''' ~. MFASUREMF.lNT . For payaent. purposes, the length of sewers installed sh,aJ.l pe measured along the oenter line. No deductions in length will be made fox tees, fittings or manholes. Where a.change in sewer size is involved, it $hall be assumed for measurement purposes that each sewer entering the lJl8l1hole extends to the center of the manhold. Where sewers are conne.ted to inlets or special structures, the length of sewer for measurement purposes shall extend to the nearest inside wall of the inlet or special structure. Where a depth of sewer is indicated on the bid item, it shall be construed to mean the depth from the top of the existing surface to the invert of the sewer.." Where no depth is stated in the bid item for ,a particular size and tY'pe of sewer, the contract unit price for all sewers of suoh a size and type shall be based upon constructing sewer of that size and type to the depths shown on the planso Where a ohange in aligIUllent or grade, ordered by the engineer, causes a change in depth of sewer and the bid i tell does not state a depth, measurement of quan- tity for any addition or deduotion in excavation work caused b,y the changes ordered will be made in cubic yards and shall be computed by using the average difference in depth between that shown on the plans and the,t ordered by the engineer, the maximum trench width specified for the top of pipe and the actual length of seWer where the change is inTolved. SECTION VI MANHOLES FOR STORM SEWERS DESCRIPTION Manholes shall be leak-tight and may be constructed of pre-cast units, concrete or cast-1n-place concrete, all in accordance with plans and these specifications. MA TERIALS REINFORCED CONCRNl'E Reinforced concrete shall consist of Portland cement, mineral aggregates and water, in which steel has been embedded in such manner that the steel and con- crete act togetherc CF21ENT Portland eement shall oonform to the requirements of the Specifications for Portland Cement ASTM C 150 t or it may be air-entraining Portland cement conform- ing to ASTM C 175. WIRE FABRIC REINFORCEMENT Reinforcement shall consist of wire conforming to ASTM A 185. BAR REINFORCEMENT Bar reinforcement shall conform to ASTM A 15, intermediate gradeo (10) Section 2-0 ~, ~ AGGRillATSS AggregatE'S shall conform to ASTlv C 33, eXc~pt that the requirements for gradation shall not apply to pre-cast items. MIXTURE The aggregates shall be so sized and grad~d, and proportioned and thoroughly mixed in proportions of cement and water as will produce a homogeneous concrete mixture of such quality that the manhole components will conform to the strength and watertightness requirements of these specifications. Admixtures or blends may be used with the written permission of the engineer. CURING Cast-in-~lace manhole components shall be moist-cured for a period not less than seven (7) days except that when high-early-strength cement is used the curing shall be not less than three (3) days. Pigmented membrane curing compound or other approved method may be applied in lieu of moist curing. STRENGTH All concrete placed under these specific~tions shall have a minimum compressive strength of thirty-five hundred (3,500) psi at twenty-eight (28) dayso Strength determination shall be in accordance with ASTM C39, unless otherwise approved by the engineero STEPS Manhole steps shall be furnished and installed as shown on the plans. MORTAR MORTAR FOR JOINTING NANHOLES ON STORti] SEWERS Mortar for jointing manhole units shall be one (1) part Portland cement to not less than on~ (1) part nor more than two (2) parts plaster sand, mixed with the least amount of clean water necessary to provide a workable mortar. CAST IRon FRAMES, COV~:;H.S, & STEPS Castings shall conform to the requirements of grey iron castings ASTN A48 and conform to the details shown on the plans~ PRE-GA ST l'IiANHOLB COMPONENTS Pre-cast manholes shall conform with ASTM C478 and with design dimensions. Cones and sections shall be substantially free from fractures, large or deep cracks and surface roughness. Slabs shall be sound and free from gravel poeketso (11) Seetion 2-0 - ~ ,_ t,~ ~ MONOLITHIC CONCRETE HANBOLES Nonolithic concrete manhol~s shall conform to detailed shop drawings submitted to the engineer for approval prior to beginning work and shall conform to the dimentional requirements specified. Walls and base shall be six (6) inches minimum thickness and space of steps shall be sixteen (16) inches. CONSTRUCTION DETAILS FOUNDA TI ON PREFr.li:'l,. TI on DEJWATERING Dewatering of the site shall conform to the requiremer.ts for sewer trench de- watering in Section V. SUB-BA SE PREl')-ltl TI ON Adequate foundation for all manhole structures shall be obtained by removal and replacement of unsuitable material with well graded granular material; or by tightening with coarse ballast rock, or by such other means as provided for foundation preparation of the connected sewers. BEDDING Pre-cast base sections shall be placed on a well graded granular bedding course conforming to the requirements for sewer bedding in Section I, but not less than four (4) inches in thickness and extending to the limits of the excavation. The bedding course shall be firmly tamped and made smooth and level to assure uniform contact and support of the pre-cast elemento CAST-IN-PLACE Bi'l SES Unless otherwise specified, cast-in-place bases snaIl be at least six (6) L~ches in thickness and shall extend at least six (6) inches radially outside of the outside dimension of the manhole section. PRE-C~ST MANHOLES Pre-cast manholes may be constTIlcted with a pre-cast base section or a monolithic base structure as specified or sho'~ on the plans. A pre-cast base section shall be carefully placed on the pre-pared bedding so as to be fully and uniformly supported in true alignment and making sure that all entering pipes can be inserted on proper gradeo All lift holes and all joints between pre-cast elements in storm sewer manholes shall be thoroughly wetted and then be completely filled with mortar, smoothed and pointed both inside and out, to ensure watertightnesso (12) Section 2-C ~, ~ ... a. q -f All lift holes on pre-oa.st elements for storm se',>ier lIMholes shall be oom- pletely filled with an approved bi tumastic ma.terial: All joints ,between pre- cast elements on storm sewer manholes shall be made with an approved bitume,stio material or fln a.pproved rubber gasket. The first pre-cast section shall be placed on the monolithic base structure before the base has taken initial set, and shall be carefully adjusted to true grade and alignment with all inlet pipes properly installed so as to form an integra.l, watertight unit; or the section shall be mortared into a suitable groove provided in the top of the monolithic base. The first seotion shall be uniformly support&d by the base concrete, and shall not bear directly on any of the pipes. Pre-cast section~ shall be placed and aligned to provide vertioal sides and vertical alignment of the ladd,er rungs. The completed manhole shall be rigid, true to dimensions and be watertight. . MONOLITHIC CONCR~'TE YJANHOLES Monolithic concrete manholes shall be constructed in accordance with the pro- visions of this Section and the details shown on the plans. EXCAVATION }~D BPCKFILLING In order to permit the joints to be mortared properly and also to permit proper compaction of the backfill materialt the excavation shall be made to a diameter of at lel';st six (6) inches greater than the dip meter of the etruc ture 0 The space between the sides of the excavation and the outer surfaces of the manhole shall be b<~ckfilled wi th Grade 8 Cru3hed Stone if the manhole is in a pavement or if the nearest point of the excavation for the manhole falls within two (2) feet of the pavement edge. If the structure falls beyond these limits, other backfilling material may be used, provided it meets with the ap- provel of the engineero The backfill sball be compacted as provided in Section 10 Excess excavated material shall be disposed of in accordance with Section II. INLET AND 01"'TLET PIPES Pipe placed in the masonry for inlet or outlet connections shall extend through the wall and beyond the outside surface of the wall a sufficient distance to allow for connections, and the masonry shall be carefully constructed around them so as to prpvent leakage along the outer surfaces~ PLACING CASTINGS Castings placed on concrete or masonry surface shall be set in full mortar beds~ The mortar shall be mixed in proportion of one (1) part cement to three (3) parts sandt by volumet based on dry materialso Castings shall be set accurately to the finished elevation so that no subsequent a.djustment will be necessary. ( 13) Section 2-G ,-, ~ 1:, I~~ .. "j " STREEI'S AT GRADE Where work is in paved streets or areas which have been brought to grade, not less than eight (e) inches or more than twenty (2Q) inches shall be provided between the top of the cone or slab and the underside of the manhole casting ring for adjustment of the casting ring to street gradeo MANHOLES NOT WITHIN STREET ARE\ S Where work is in cultivated areas, the top of the casting, unless otherwise directed by the engineer, shall be set at existing ground surface. PIPE CONNEDTIONS Special care shall be taken to see that the openings through which pipes enter the structure are completely and firmly rammed full of jointing material to ensure watertightness. CLEANllm All newly constructed manholes shall be cleaned of any accumulation of silt, debris, or foreign matter of any kind, and shall be free from such accumulations at the time of final inspection. SECTION VII CATCH BASIN, INLET CONS'l"RUC'l'ION DESCRIPrION This work shall consist of catch basins or inlets, together with the necessary cast iron frames and grates or lids, all constructed in accordance with the specifications where indicated or directed by the engineer, and conforming in all respects to lines, grades, and dimensions shown on the plans and furnished by the engineer. MA TERIALS All materials shall conform to the Material Requirements for Manholes in these specificationsv CONSTRUCTION METHODS CONCREI'E Pre-cast concrete structures shall be constructed in accordance with applicable provisions of Section VI. (14) Section 2-C ~ ~ '1" ,it :a. .( H CONCRI!.'"TE NASONRY :IN ITS Concrete masonry units shall be constructed in horizontal courses with vertical joints broken. The units shall be laid in mortar composed of one (1) part cement to three (3) parts sand, by volume, based on dry materialso Mortar which has been mixed longer than forty-fjve (45) minutes, or which has developed its initial set, shall not be used. PLACING CAS'rINGS Castings placed on concrete or masonry surfaces The mortar shall be mixed in proportions of one parts sand, by volume, based on dry materials. to the finished elevation so that no subsequent shall be set in full mortar beds. (1) part cement to three (3) Castings shall be set accurately adjustment will be necessaryo exCAVATION AND BACKFILLING In order to permit the joints to be mortared properly and also to permit proper compaction of the backfill material, the excava,tion shall be made to a diameter of at least six (6) inches greater than the diameter of the structureo The backfill shall be compacted as provided in Section I. ~cess excavated material shall be disposed of in accordance with Section 110 INLET AND OUTLE'r PIPES Pipe placed in the masonry for inlet or outlet connections shall extend through the walls and beyond the outside surfaces of the walls a sufficient distance to allow for connections, and the masonry shall be carefully constructed around them so as to prevent leakag"e along the outer surfaces. CUllING II ND PROTE.'CTION After the mason1~ work is completed, it shall be kept moist &ld protected from the elements in a satisfactory manner for a period of not less than forty-eight (48) hourso CLEANING All newly constructed catch basins, inlets, and similar structures shall be cleaned of any accumulation of silt, debris, or foreign matter of any kind, and shall be free from such accumulations at the time of final inspection. (15) Section 2-C e' ;""'**'\ 1""'\ .. . &.'~ ~ ( ... '" SECTION 2: That the recommendation of the Board of Local Improvements of the Village of Mount Prospect, providing for the improvement, and the estimate of the cost thereof made by the Chairman of the Board of Local Irnproveroonts ,botp: hereto attached and made a part hereof, be, and the same are hereby approved. SECTION 3: That the said improvement shall be made and the whole cost thereof, together with an amount not exceeding six per cent (6%) of the estimated cost, to-wit: TIVO HUNDRED SilTY THREE THOUSAND SEVEN HUNDRED FORrY DOLLARS AND NINErY FOUR CENrS ($263,740.94), which is hereby provided for to apply towards the cost and expen'3e of making, levy.ing and collecting said special assessment and all other expenses allowed by law, being the amount included in the estimate, thereof, shall be paid by special assessment, in accordance with the Illinois Municipal Code, Article 9, Division 2 and 8!1Endments thereto. SECTION 4: That the aggregate amount herein ordered to be assessed against the property and against the municipality, if any, and also the assessment on each lot and parcel of land herein assessed shall be divided as follows: The said assessment to pay the cost of construction of said improvement and the cost of levying, making and collecting said assessroont and all expenses allowed by law, shall be divided into ten (10) instal1nents, in the manner provided by the statute in such case made and provided. So much of the aggregate amount of the assessment as represents the cost of levYing, making and collecting the special assessment and all expenses allowed by law, together with all fractional amounts so as to leave the remaining install- ments of the a.ggr'egate assessment equal in amount and each in multiples of $100.00 shall be appcrbionate to the first installment of the said special assessment. The first installment shall be due and payable on the 2nd day of January next after , the filing of the first voucher issued on account of work done on the said irrproverent. The second installment of said assessment shall be due and payable one year thereafter, and so on annually until all assessments have been paid. IT IS HEREBY made the duty of the Board of Local Improvements of the Village of f40unt Prospect, to file in the Office of the Clerk of the Court in which such assessment was confirmed,. a certificate signed by the Secretary of the Board of Local Improvements of the Village of Mount Prospect of the date of the first voucher and the amount of said voucher, within thirty (30) days after the issuance of said voucher. All installments shall bear interest until paid at the rate of six per cent (6%) per annum. Interest on all instalJ.Irents shall begin to run in ~" ,- 17 - ~, .~ .. .. (, iI'l; . "," I ....... accordance with the provisions of the Illinois Municipal Code, Articleg , DiviSion 2 and amendments thereto. Interest on such first installment shall be due and payable and shall be collected at the sam:; time as the first installment. Interest on the second and succeeding instal1ments shall' be due and payable and shall be collected with the installments respectively as in said Code relating to special assessment provided. SECTION 5: That t:or the purpose of anticipating the collection of the second and succeeding install.rrJ:;nts of said assessment for the cost of said improvements, the Village of Mount Prospect shall issue bonds payable out of said installments, bearing interest at the rate of six per cent (6%) per annum, payable annUally, signed by the President of the Board of Trustees of the Village of Mount Prospect and" attested by the Village Clerk of said Village. Said bonds shall be issued in accordance with and shall in all respects conform to the provisions of the Illinois Municipal Code, Article 9" Division 2 and amendments thereto. SECTION 6: That the President of the Village of Mount Prospect, be" and he is hereby directed to file a Petition in the Circuit Court' of Cook County, Illinois" in the name of the people of the Village of Mount Prospect, praying that steps may be taken to levy a special assessment for the purpose of defraYing the expense of said improvement so far as the same may lawfully be done and to ascertaj.n what property will be benefited, in accordance with the provisions of this ordinance, and in the manner prescribed by lav\T. SECTION 7: That all ordinances" or parts of ordinances in conflict with this ordinance, be, and the sa.rre are hereby repealed. SECTION 8: That this ordinance shall be in full force and effect from and after its passage and approval thereof, according to lailll. AYES: NAYS: /' '0 o day of t)c PASSED and APPROVED this ).. ,L ~p~ Hichard H. Monroe" Village Clerk - 18 -