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| Title
16 SUBDIVISIONS AND LAND IMPROVEMENT1 |
LAND IMPROVEMENTS |
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Chapters: |
Sections:
Exhibits:
16.44.005 Definitions. A. See Chapter 16.08 for applicable definitions. B. Abbreviations: ANSI = American National Standards Institute, ASTM = American Society for Testing Materials, AWWA = American Water Works Association, DI = Ductile Iron, IDOT = Illinois Department of Transportation, IDOT CA-6 = That department's gradation of coarse aggregate, PVC = Polyvinylchloride, a plastic, SDR = Standard Dimension Ratio, VCP = Vitrified Clay Pipe. (Ord. 1997-M-103 § 1; Ord. 1989-M-65 § 1.) 16.44.010 Purpose. The following standards and specifications set forth in this chapter outline the minimum Ordinance No. 1963-21, the subdivision control ordinance of the city of St. Charles. The standard specifications are covered under three primary headings of: A. Sanitary sewers; B. Water mains; C. Street construction. The standard specifications are followed by a series of general specifications which outline in detail the materials to be used and the methods to be followed in accomplishing the work. (Ord. 1960-29 (part).) 16.44.030 Standards for road and bridge construction. In the standard specifications for street construction, reference is made to the Standard Specifications for Road and Bridge Construction of the Illinois Department of Transportation, adopted July 1, 1988, three copies of which were filed with city clerk more than 30 days prior to the passage of the ordinance adopting this provision. These are to be considered as a part of these standards and specifications as if quoted herein verbatim. These specifications are hereinafter referred to as "State standard specifications." (Ord. 1989-M-65 § 1.) 16.44.050 Plans and specifications - Requirements generally. A. All plans and specifications for land improvements shall be prepared generally in accord with those prepared for the city on city financed improvements. B. Street plans shall show all horizontal and vertical alignment. Curve data for horizontal and vertical curves shall be included on the plan sheets. C. Storm sewers shall be provided unless existing storm sewers are adequately sized and placed to accommodate runoff. Such sewers shall provide for extension to land lying within the drainage area, whether such land is within the subdivision or not. Storm sewers shall be designed by the Rational Method and copies of the design computations shall be submitted with the plans. Inlets shall be provided so that surface water is not carried across or around any intersection, nor for more than a distance of six hundred feet in the gutter. D. All plans shall describe an adequate number of bench marks, with elevations referenced to mean sea level, so that elevations may be checked at any point without more than one setup of a surveyor's level. E. Unless otherwise approved, plans shall be on twenty-four-inch by thirty-six-inch sheets. Each set of plans shall include a title sheet showing the name of subdivision, type of work covered, a location map showing relation of area to be improved to existing streets, an index of sheets, a summary of quantities, and the name and address of the person preparing the plans. Plan and profile shall be plotted on federal aid sheets, plat 1 or 2, at a scale of one inch to fifty feet, horizontal; and one inch to five feet, vertical. Cross sections shall be plotted on federal aid sheets, plat 3, at a scale of one inch to ten feet, horizontal and vertical. All necessary information shall be shown, including earthwork quantities. F. All plans and specifications shall be prepared by an engineer legally authorized by the state and shall bear the engineer's seal. G. The subdivider and any contractors employed by him shall take special care to avoid disturbance of lot and block corners and other survey points. Any such corners or points removed or disturbed shall be reestablished in their correct position and location before application is made for acceptance by the city. H. No deviations from plans and specifications shall be made without prior approval. I. Before acceptance of improvements, the subdivider shall furnish the city with the original or certified copies of all materials tests required, an affidavit that all materials, labor and other costs have been paid for and three prints of plans revised to show the final layout of the improvements as built. These shall clearly indicate the location of all underground utilities and shall give measurements to house service sewers measured from the nearest downstream manhole and water services measured from lot or block corners. (Ord. 1960-29 (part).) 16.44.060 Sanitary sewers - Standard specifications for Gravity Sewers. A. Installation shall be in accordance with the Standard Specification for Water and Sewer Main Construction in Illinois, fourth edition (hereafter the "Standard Specifications"), three copies of which were filed with city clerk more than 30 days prior to the passage of the ordinance adopting this provision, and applicable provisions of the St. Charles Municipal Code shall govern. The sanitary sewer system designs shall have a minimum usable, watertight service life of fifty (50) years. B. Sewers shall be of adequate size to serve the entire development proposed. The minimum size of street sewers shall be eight (8) inches inside diameter. The minimum size of sewer service connection is six (6) inches, inside diameter. C. Before commencing the sewer layout, the subdivider shall confer with the city to determine the required size and grades for any trunk sewers traversing the subdivision to fit the city's overall plan. These shall be installed by the subdivider under arrangements as provided in the subdivision control ordinance. D. A registered Illinois professional engineer must certify conformance to applicable provisions of 16.44.090 through 16.44.120. E. A registered Illinois professional engineer must certify conformance to applicable installation provisions of 16.44.130 through 16.44.330. F. Sanitary sewer service laterals shall be provided for each lot, parcel or tract. The lateral shall extend to the right-of-way line. G. Sanitary sewer service connections shall consist of a 1/8 sewer pipe curve set in the bell of a Y fitting or a combination T-Y molded fitting. The necessary lengths of straight pipe may extend to within five (5) feet of the building foundation. All requirements for material and installation for sewer mains are applicable to sewer service connection pipes. Testing of sewer service connection pipes shall be done as part of sewer main tests as defined in Section 16.44.260 for infiltration of water and exfiltration of air under pressure. PVC sewer service pipe is not required to have deflection tests. Television testing of sewer service pipe is not required. H. On completion of the sewer, the contractor shall provide facilities at the low end of the main sewer for temporarily dewatering the sewer. Water pumped out shall be disposed of in a manner acceptable to the city engineer. I. No construction shall commence until a copy of a permit from the Illinois Environmental Protection Agency is filed with the city. J. Manholes shall conform to standard drawing number 16.44.060.J. K. Minimum weight of cover shall be as follows:
L. The fluid flow design characteristics of all sewer pipe shall use a Manning "n" Factor of .013. (Ord. 2005-M-18 § 1; Ord. 2002-M-30 § 1; Ord. 1989-M-65 § 1.) 16.44.061 Sanitary Sewers – Standard Specifications for Force Main Sewers. A. Installation shall be in accordance with the Standard Specification for Water and Sewer Main Construction in Illinois, fourth edition (hereafter the “Standard Specifications”), three copies of which were filed with the city clerk more than 30 days prior to the passage of the ordinance adopting this provision, and applicable provisions of the St. Charles Municipal Code shall govern. The sanitary sewer system designs shall have a minimum usable, watertight service life of fifty (50) years. B. Force main sewers shall be of adequate size to serve the entire development proposed and the maximum capacity of the proposed lift station, whichever is greater. The minimum size of a force main shall be four (4) inches inside diameter. C. A registered Illinois professional engineer must certify conformance to applicable provisions of 15.44.090 through 16.44.120. D. A registered Illinois professional engineer must certify conformance to applicable installation provisions of 16.44.130 through 16.44.330. E. A manhole shall be placed over each horizontal bend in the force main and each horizontal bend of the force main shall be an elbow with a cap. F. Manholes shall be placed over the force main a minimum of every seven hundred (700) feet and a tee with a cap shall be placed inside every manhole. G. On completion of the force main, the contractor shall provide facilities at the low end of the main sewer for temporarily dewatering the sewer. Water pumped out shall be disposed of in a manner acceptable to the City Engineer. H. No construction shall commence until a copy of a permit from the Illinois Environmental Protection Agency is filed with the City. I. Manholes shall conform to standard drawing number 16.44.060.J (Exhibit at end of Chapter) J. An air release valve and vault shall be placed at each high point of the force main. Air release valve and vault shall conform to standard drawing number 16.44.061.J (Exhibit at end of Chapter) (Ord. 2005-M-18 § 1.) 16.44.070 Water Distribution Systems - Standard specifications. A. Water main pipe shall have a minimum diameter to satisfy fire flow requirements or eight (8) inches unless the total length of the public main is 300 feet or less and as approved by the Director of Public Works, the minimum diameter may be six (6) inches. Water main pipe shall be ductile iron manufactured in accordance with the requirement of ANSI/AWWA C151/A21.51. Push-on joints and mechanical joints for such pipe shall be in accordance with ANSI/AWWA C111/A21.11. Pipe thickness shall be designed in accordance with ANSI/AWWA C150/A21.50 and shall be based on laying conditions and internal pressures specified in the project plans with a minimum thickness class of 52. All side yard and rear yard water main not directly adjacent to a public roadway or paved surface shall have a minimum thickness class of 55 with a type five laying condition, as defined in ANSI/AWWA C/600/A21.50 Section 3.3.7, see City Standard Drawing No. 16.44.070.03, attached. Pipe shall have cement mortar lining and seal coating in accordance with ANSI/AWWA C104/A21.4. B. Installation of Ductile-Iron water mains and their appurtenances shall be in accordance with the requirements of ANSI/AWWA C600/A21.50. Including lubricating mechanical joint gaskets with pipe lubricant and applying a minimum of 75 foot pounds of torque to bolting systems. Water main shall have a minimum type three laying conditions, as defined in ANSI/AWWA C600/A21.50 Section 3.3.7, see City Standard Drawing No. 16.44.070.01, attached. Polyethylene encasement is required in all installations in accordance with ANSI/AWWA C105/A21.5. Polyethylene encasement may be deleted if soil analysis, from the site, performed by a Professional Engineer, approved by the City, indicated that polyethylene encasement is not required. To insure electric conductivity, brass wedges shall be installed per Section 41.205C of the Standard Specifications for Water and Sewer Construction in Illinois, dated May 1996, as amended. Water main shall have a minimum cover of 5 (five) feet and maximum bury depth of 10 (ten) feet, unless approved by the City Council. Water main and publicly owned water appurtenances shall be located a minimum of 20 (twenty) feet from buildings or structures. If site conditions will not allow for the minimum separation approval must be received from the City Council. C.
D. Ductile-iron Compact Fittings shall be manufactured in accordance with the requirements of ANSI/AWWA C153/A21.53. Ductile-Iron and Gray-Iron fittings material and manufacture shall be in accordance with the requirements of ANSI/AWWA C11/A21.10. E. Distribution system valves shall be resilient wedge gate valve, epoxy coated, non-rising stem, o-ring seal, open left with a 2” square operating nut, manufactured in accordance with the requirements of AWWA C509-87. All distribution valves shall be housed in valve manholes in accordance with the detail provided in the exhibit entitled “Valve Vault” appended to this chapter except those valves on hydrant leads which shall be furnished with cast iron boxes and covers. Valves with a nominal pipe diameter under 10 inches shall be housed in valve manholes with an inside diameter of 4 feet, valves 10 inches and larger shall be housed in valve manholes with an inside diameter of 5 feet. The weight on the manhole’s cast iron cover and lid shall be not less than four hundred pounds, except where the manhole lies with the paved surface area of a collector street in which case the manhole cover and lid shall weigh not less than five hundred forty pounds. Manhole lids shall have “Water” imprinted on the lid. Water main with a bury depth of 6.0’ and greater shall have steps installed in valve vaults. F. F. Fire Hydrants shall be either Clow Medallion Fire Hydrants, as manufactured by the Clow Valve Company of Oskaloosa, Iowa, or Mueller Super Centurion 200 Fire Hydrants, as manufactured by Mueller Company, Decatur, Illinois, or Waterous Pacer Model WB-67-250, or equal as approved by City Council. Hydrants will have two, two and one-half inch hose nozzles and one, four and one-half inch steamer nozzle threaded for St. Charles thread. All threads shall be National Standard. All hydrants shall be for six-inch pipe connection and shall have a five-inch valve opening. Hydrants shall be of sufficient length to allow for five feet of cover over the hydrant lead. An auxiliary six-inch valve and valve box shall be installed on each hydrant lead. All hydrants shall have two coats of paint matching the city standard for color, commonly known as Rover Red. Hydrants shall have installed "Hydrafinder Standard" hydrant locators as manufactured by the Radon Corporation of St. Charles, Illinois, or equal approved by the City Council. G. Valve boxes on hydrant leads shall be buffalo-type, three piece, Mueller No. H-10357, Clow F-2450, or equal as approved by the City Council. All valve boxes shall have a valve box stabilizer installed. H. After the water mains have been tested in accordance with Section 16.44.290 and disinfected in accordance with Section 16.44.300 the water service line shall be provided from the main to the outlet side of the curb stop, for each lot. The copper service pipe shall be soft temper, type-K copper tubing, one-inch diameter minimum. Approved fittings shall be of compression type manufactured by the Ford Meter Box Co. Inc., of Wabash, Indiana, the Mueller Co. of Decatur, Illinois, or equal as approved by City Council, as follows: One Inch Corporation Stop: Ford No. FB 1000-4-Q Mueller No. B-25008 One Inch Curb Stop: Ford No. B-44-444-Q Mueller No. B-25155 Every water service line from the corporation to the curb stop shall be inspected by the Water Division Foreman or his designee. All inspections shall be open trench. Contractors requesting service line inspections shall contact the Water Division 48 hours prior to requested inspection time. I. Each curb stop shall be provided with a cast iron service box Mueller No. H-10300 or equal approved by the City Council complete with lid. Service box shall be of sufficient length to permit the top to be installed approximately three inches above finish grade. Each service box shall be provided with a cap with the word "water" cast in the top. J. Tapping sleeves, for sizes up to eight-inch, shall be stainless steel manufactured by Romac Industries, Inc., of Seattle, Washington, Model No. SST-945 or Mueller Co. of Decatur, Illinois, Model No. H-615 or equal approved by the City Council. All fasteners used to connect tapping sleeve to tapping valve shall be 304 grade stainless steel fasteners. K. Unless specifically approved, all water mains and services shall be laid in separate trenches from sewer and sewer services, as outlined in Sections 16.44.130 through 16.44.140. L. No Public Water Main construction shall commence until a Public Water Supply Construction Permit is obtained from the Illinois Environmental Protection Agency, and a copy of such permit is filed with the city. M. Landscape plantings shall not interfere with operations and maintenance of water appurtenances. Trees shall not be planted within ten feet of all hydrants, valve vaults, or curb boxes. Bushes and shrubs shall be maintained five feet from water appurtenances. Sod is required around hydrants for ten feet. Hydrant plants shall follow the guidelines depicted in City Standard drawing No. 16.44.070.02, attached. N. All below grade, factory installed bolts and fasteners shall be 304 grade stainless steel. (Ord. 2007-M-89 § 1; Ord. 2002-M-95 § 1;Ord. 1999-M-29 § 1; Ord. 1997-M-103 § 1; Ord. 1993-M-46 § 1; Ord. 1960-29 (part).) 16.44.080 Street construction - Standard specifications. A. Subgrade.
B. Gravel of Crushed Stone Base Course.
C. Bituminous Surface Treatment, Subclass A-3.
D. Bituminous Concrete Surface Course, Subclass B-5. This work shall be in accordance with Section 44 of the state standard specifications. The bituminous mixture shall be placed only when the temperature of the air in the shade is above forty degrees fahrenheit and only when weather conditions are deemed suitable by the city. E. Concrete Gutter, Type B Modified.
F. Portland Cement Concrete Sidewalk. This work shall be in accordance with Section 89 of the state standard specifications. The city's sidewalk standard shall be used as a minimum for the width and thickness of sidewalks. G. Storm Drainage.
(Ord. 1960-29 (part).) 16.44.091 Vitrified clay pipe, material. A. All VCP pipe shall conform for acceptance to A.S.T.M. C-700. B. Joints shall conform to requirements of Section 16.44.240, or shall conform to requirements of A.S.T.M. C-425. (Ord. 1989-M-65 § 1.) 16.44.092 Ductile iron pipe, material. The City Engineer shall specify whether mechanical or push-on joint will be used. The engineering plans shall specify certification and test records. Engineering plans shall specify written statements of conformance for inspection and foundry records as provided in these specifications. (Ord. 1997-M-103 § 1; Ord. 1989-M-65 § 1.) 16.44.093 PVC plastic pipe, material. A. All PVC pipe and fittings shall conform to ASTM D-3034 for sizes six (6) through fifteen (15) inches. The minimum SDR is twenty-six (26) for pipe and SDR thirty-five for fittings. For pipe diameters eighteen (18) to twenty-seven (27) inches, pipe and fittings shall conform to ASTM F-679. All PVC plastic shall have a cell classification of 12454-B. Purchase orders shall specify written report of test results and certification of material by manufacturer per ASTM specifications. B. Joints shall conform to ASTM D-3212. Solvent joints are not permitted. (Ord. 1989-M-65 § 1.) 16.44.096 Special conditions, material. For pipe sizes not herein specified or for other conditions of environment or application, the engineer will specify an alternate material as described in the standard specifications. (Ord. 1989-M-65 § 1.) 16.44.101 Vitrified clay pipe, application. A. Standard strength clay pipe (ASTM C-700) shall be permitted for trench depth of twelve (12) feet or less measured from top of pipe. Extra strength clay pipe (ASTM C-700) shall be used for depths up to twenty (20) feet. Ductile iron or other engineer specified material shall be used for depths exceeding twenty (20) feet. B. VCP shall only be used for gravity mains (i.e., zero pressure). (Ord. 1989-M-65 § 1.) 16.44.102 Ductile iron pipe, application. DI pipe may be used on all gravity mains (i.e., zero pressure) and shall be used on all force mains or for depths exceeding twenty (20) feet. Coal tar enamel or other suitable coating will be specified by the engineer to protect internal diameter from corrosion. When external corrosion resistance is required, the polyethylene encasement of ANSI C-105 shall be used. (Ord. 1989-M-65 § 1.) 16.44.103 PVC pipe, application. PVC pipe shall only be used in gravity mains (i.e., zero pressure) for depths up to twenty (20) feet or less measured from top of pipe. (Ord. 1989-M-65 § 1.) 16.44.110 Sewer pipe, VCP specials. A. Branches shall be furnished with the connection or connections of the size or sizes specified, securely and completely fastened by fusion in the process of vitrification to the barrel of the pipe. B. Channel or split pipes, curves and branches shall be accurate half-sections of the corresponding size of straight pipe and specials. C. Pipes shall bear the initials or name of the person, company or corporation by whom they are manufactured, location of the mill, and the symbol ES on extra strength pipe. (Ord. 1960-29 § KA(3).) 16.44.120 Sewer pipe, inspection of material. A. All pipes shall be subject to inspection at the factory as defined in material testing specifications included herewith, and at the trench or other point of delivery by the engineer. The purpose of this inspection by the engineer will be to cull and reject pipes which fail to comply with the requirements of the specifications. B. All rejected pipes will be plainly marked by the engineer and shall be replaced by the contractor with pipes which meet the requirements of these specifications, without additional cost. (Ord. 1989-M-65 § 1.) 16.44.130 Sewer and water main construction - Generally. A. The work included in Sections 16.44.140 through 16.44.300 consists of the furnishing of all material and labor required for the construction complete in place of sewers or water mains and will be paid for either on a lump sum basis or unit price basis whichever is stipulated in the proposal. B. Included in Sections 16.44.140 through 16.44.300 is all excavation required by such work, all pumping, bailing and draining, sheeting and shoring, removal and disposal of buried structures and obstacles, and all necessary measures to provide for local travel and access. C. The costs of all junctions shall be included in the contract price unless otherwise specified in the proposal. D. Connections with existing sewers or water mains shall be made at points noted on the plans and wherever an existing sewer or water main is intercepted by the proposed system of sewers or water mains, if so ordered by the engineer. E. Old manholes shall be repointed and any loose brick in the walls of the manholes shall be relaid. F. Junctions for future sewer connections shall be bricked off at the ends, thoroughly closing them. When connections are made with sewers carrying water, special care must be taken that no part of the work is built under water, a flume or dam must be put in and the new work kept dry until finished. G. The terminations or intersections of submains and laterals with main and submain respectively, shall be made through junctions previously built. If for any cause, the junction previously made in the sewer with which the contractor is to connect is to be changed in size or position or a new one is to be built, the contractor shall without extra charge, do all the necessary labor of any kind as a result of said change. (Ord. 1960-29 § KF(1).) 16.44.140 Sewer and water main construction - Protection of water mains and service lines from sewers. A. Water mains - Horizontal clearance.
B. Water mains - Vertical clearance.
C. Water service lines - Clearances. The horizontal and vertical separation between water service lines and all sanitary sewers, storm sewers, or any drain should be the same as for water mains, as detailed in subsections A and B of this section, except that when minimum horizontal and vertical separation cannot be maintained, brass, copper or ductile-iron pipe shall be used for water service lines. (Ord. 1997-M-103 § 1; Ord. 1989-M-65 § 1.) 16.44.150 Sewer and water main construction - Excavation. A. The contractor shall make to the necessary width and depth all excavations required for the construction of the improvement. Excavation shall include clearing the site of the work, the loosening, loading, removing, transplanting and disposing of all materials, wet or dry, necessary to be removed for purpose of construction, the sheeting, bracing, draining and backfilling of trenches and pits and the grading and shaping of fill about finished structures. B. The contractor must assume the risk of meeting quicksand, hardpan, boulders, clay, rubbish, unforeseen obstacles, underground conduits, gas pipe, drain tile, railroad tracks, pavements, etc., and accept payment for all work at the contract price. C. No claim for an amount of money beyond the contract price of the work will be entertained or allowed on account of the character of the ground in which the trench or other excavations are made, except for rock excavation. D. The sites of all excavations and embankments shall be first cleared of all trees (except those designated by the engineer to be saved), stumps, brush, rubbish, or other surface material which shall be removed and disposed of in a satisfactory manner. All top soil, loam and similar material covering the location of excavation shall be removed and kept separate and piled for use in resurfacing as may be directed. All trees designated by the engineers to be saved shall be adequately protected by boxes in a manner approved by the engineer. E. The ground shall be excavated in open trenches except where tunneling is considered necessary or proper by the engineer, in such direction as is required, to the width and depth as may be necessary for the proper construction of sewer or water main and appurtenances according to plans. F. The trenches must be of sufficient width for ample room within the limits of the excavation or the lines of the sheeting to permit the work to be constructed in the manner and size specified. G. Subsection
G does not apply to PVC gravity sewer pipe; see Section 16.44.155. The
bottom width of the trench at and below the top of the pipe, and inside
the sheeting and bracing, if used above the top of the pipe, shall not
exceed the following widths, unless otherwise specifically approved by
the engineer:
H. Subsection H does not apply to PVC gravity sewer pipe; see Section 16.44.155. If the character of the ground met in excavating is such that the external form of the sewer cannot be preserved, the excavation shall be made to conform as nearly as possible to the external shape and dimensions of the sewer and the space between the external sewer lines and the bottom and the sides of the excavation as made shall be filled by the contractor with crushed stone, Type B, per ASTM C-12, compacted to a minimum proctor density of 80%. I. Where trench backfill is to be paid for separately, the width of the trench shall be limited as specified herein. If a wider trench is dug, trench backfill outside these limits shall be furnished and placed at the contractor's expense. J. The excavation of the trench shall not advance more than two hundred feet ahead of the completed masonry or pipe work except where, in the opinion of the engineer, it is necessary to drain wet ground. K. No tunneling of pipe sewers or water mains will be allowed except upon written permission from the owner. The tunnels shall be of such width and height as the engineer may direct and shall be excavated in conformity with the cross-section approved by him. L. Elevation of the bottom of trenches shall be checked to the satisfaction of the engineer before sewers or water mains are laid. M. In the event that any existing gas pipes, water pipes, conduits, sewers, watercourses and tile drains are blocked or interfered with during the construction of said improvement, the contractor shall maintain continuous operation and restore the same and leave it in the same condition as they were prior to the improvement. N. At all cross streets, the contractor shall, when directed by the engineer, make provision for the passage of vehicles and pedestrians either by bridging or otherwise. O. The contractor must make necessary arrangements with all persons, firms and corporations owning or using any pipes, tracks or conduits, affected by this improvement, to maintain and protect such pipes, tracks or conduits during construction. The cost of any such protection must be merged in the prices bid for the improvement. (Ord. 1989-M-65 § 1; Ord. 1960-29 § KF(3).) 16.44.155 PVC sewer pipe - Excavation. A. Subsections 16.44.150 A through D and I through O apply to PVC sewer pipe. Common trench construction does not apply. B. Trench width:
C. Braced
and sheeted trenches. The general requirements of the standard specifications
will apply. Depending upon the severity of the condition, the installer
may elect to use tight sheeting, stay bracing, trench jacks or a trench
shield or box to support the trench during pipe-laying operations. If
the condition is too severe, it may be necessary to leave any sheeting
in place or to use chemical or cement grouting of the soil adjacent to
the excavation to prevent migration between the material used beneath
and around the pipe and trench wall material. To allow sufficient working
room plus trench wall support, the minimum excavated trench width to the
outside of the sheeting or shield box shall be as shown in table:
(Ord. 1989-M-65 § 1.) 16.44.160 Sewer and water main construction - Trenching and trimming. A. All trenches must be of sufficient width for properly constructing sewers, water mains, conduits, or other structures in the manner and of the size specified; and for removing any material which the engineer may deem unsuitable for foundation as well as to permit suitable sheeting and bracing to be placed wherever required. Whenever the nature of the ground will admit, the bottom shall have the shape and dimensions of the outside of the masonry or pipe. B. Wherever, in the opinion of the engineer, it is impossible to use excavating machinery and protect existing private or public property, or wherever use of excavating machinery will do damage of such nature as to involve irreparable or very costly damages, the contractor will use hand excavation tools. C. Sidewalks must in no case be obstructed and the contractor shall make provision at all cross streets and driveways for the free passage of foot passengers and vehicles by bridging or otherwise. (Ord. 1960-29 § KF(4).) 16.44.170 Sewer and water main construction - Unauthorized excavation. Whenever the excavation is carried beyond the lines and grades given by the engineer, the contractor shall, at his own expense, refill all such excavated space with such material and in such manner as may be directed. Beneath and around concrete structures, space excavated without authority shall be thoroughly compacted when refilling or, if deemed necessary by the engineer, shall be refilled with concrete at the contractor's expense. (Ord. 1960-29 § KF(5).) 16.44.180 Sewer and water main construction - Protection against water. A. The contractor shall do all pumping and bailing, build all drains, and do all other work necessary to keep the excavation clear of groundwater, sewage or stormwater during the progress of the work and until the finished work is safe from injury. B. Where the excavation is in wet sand and suitable construction conditions cannot be obtained by other methods, the contractor shall install and operate at no additional compensation a pumping system connected with well points, so as to drain the same effectually. No masonry shall be laid in water and water shall not be allowed to rise over masonry until concrete or mortar bags set at least forty-eight hours. All water pumped or drained from the work shall be disposed of in a satisfactory manner without damage to adjacent property or to other work under construction. Necessary precautions shall be taken to provide against flooding. C. No sanitary sewer shall be used for disposal of trench water, unless specifically approved by the city engineer and then only if the trench water does no ultimately arrive at existing pumping or sewage treatment facilities. No water containing settleable solids shall be discharged into storm sewers. The proposed method for the control of ground water shall be submitted to the city engineer for approval. (Ord. 1989-M-65 § 1.) 16.44.190 Sewer and water main construction - Maintenance of excavation. A. All trenches and other excavations shall be properly sheeted and braced to furnish working conditions acceptable to the engineer and to prevent damage and delay to the work. Side slopes shall be such that material will not slide into the bottom and any material sliding down shall be removed. Where masonry is built directly against the sides or bottom of the excavation, the final trimming shall be done just before the concrete is placed. To secure the protection of the work, the contractor must furnish and put in place at his own expense, braces, sheeting, etc., as may be necessary for the safety of the work, the public or adjacent property. B. The sheeting and bracing shall be removed as the work progresses in such manner as to prevent the caving in of the sides of the excavation, or any damage to masonry. While being drawn, all vacancies left by the plank, shall be carefully filled with fine sand and rammed by special tools or puddled as directed. C. Where a sewer or water main is built along an existing pavement, curb and gutter or sidewalk, the trench shall be sufficiently sheeted and braced to prevent caving and said sheeting shall not be removed until the backfill has been flooded and completed. D. The owner may order the sheeting and bracing left in, when in its opinion it is necessary for the protection of the work, the public or adjacent property. Any sheeting so ordered left in place will be paid for at a rate quoted in the proposal, said price to cover the furnishing, cutting, placing and bracing. E. The contract price shall include the cost of all temporary supports and braces that may be necessary to secure a safe prosecution of the work until the permanent structure is complete; such temporary supports must in all cases be removed by the said contractor at his own expense after or concurrently with the completion of the permanent structure. (Ord. 1960-29 § KF(7).) 16.44.200 Sewer and water main construction - Foundations and timbers. A. After the trench has been opened and to grade, it will be examined by the engineer who will determine whether or not it is satisfactory for pipe laying or it is necessary to stabilize the base, install concrete cradle, or drive piling. Any pipe laid in a trench that has not been examined and approved by the engineer is done so at the contractor's risk. B. The contractor will be allowed additional compensation for this work at prices named for the different kinds of foundation required only when shown on plans or called for in the proposal or specifications. C. Whenever the ground is sufficiently firm and unyielding, the masonry or pipes (except PVC pipe and ductile-iron water main) shall be laid directly on the bottom of the excavation and, in the cases of pipes, if the foundation is good, firm earth, it shall be pared or molded to give a full support to the lower half of each pipe and, if necessary, Type B, ASTM C-12 crushed stone shall be adopted in case the excavation has been made deeper than necessary. (Ord. 1997-M-103 § 1.) D. When so designated on the plans or ordered by the engineer, the contractor shall furnish and place piling foundations. Piling shall be driven or jetted in a manner acceptable to the engineer. The contractor is advised to purchase piling so designated or ordered only after a test pile (or piles) has been placed. When piling is required, the contractor when ordered by the engineer shall furnish and place test piles in a location designated by the engineer. The bearing value of a driven test pile will be computed on the basis of the engineering news record formula. When so ordered by the engineer, the contractor shall furnish and place framework and shall merge, in the unit price bid for pile foundations, the extra cost of furnishing the placing test pile (or piles). Payment will be made for test piles only on the per foot price included in the proposal for piling. E. Payment for all piling will be based on the actual length of piling incorporated in the work, that is, cut off tops will not be included in footage measured for payment. F. Any timber used for constructing timber cradles, or any other part of the permanent construction for said work, shall be subject to inspection, and approved by the engineer before it is installed in the work. Nothing but sound, durable timber, suitable in the opinion of the engineer for the purposes for which it is to be used shall be allowed on the work for sheeting, bracing or supporting timber. The dimensions of the timber to be used as a part of the permanent construction shall be specified by the engineer before such timber is installed in the work. G. No allowances will be made for timber installed and left in place, unless the quality and sizes of said timber have been passed upon by the engineer and unless the installation of such in writing by the engineer as their authorized representative. Timber piling shall be peeled mixed hardwood, sound for line and straightness with approximately a twelve-inch butt and a minimum of a six-inch tip. H. Concrete cradle composed of one part of Portland cement, two parts of fine aggregate and three and one-half parts of coarse aggregate shall be constructed where shown on plans and of such size and section as shown thereon, at points as are designated on the plans, or as ordered by the engineer. This concrete shall be of the same materials and workmanship as herein specified for concrete except weight batching will not be required. (Ord. 1989-M-65 § 1; Ord. 1960-29 § KF(8).) 16.44.210 Sewer main construction, alignment. The contractor shall use an engineer approved method for measuring the line at each sewer. The contractor will keep appropriate records to enable accurate as-built drawings to be developed. (Ord. 1989-M-65 § 1; Ord. 1960-29 § KF(9). 16.44.220 Sewer and water main construction - Grade. A. Sewers must be built so as to remain true to line and grade. The inclining grade of the bottom of the sewer after completion shall be such that after flooding, the floodwater will drain off so that no remaining puddle of water will be deeper than three-eights of an inch on pipe thirty-six inches internal diameter or smaller, and five-eights of an inch on pipe larger than thirty-six inches internal diameter. Any section of pipe that does not comply with this specification at any time previous to final acceptance of the work shall be replaced or relaid at the contractor's expense. B. The contractor must locate and keep a record of all Y's and T's by measurement to nearest downstream manhole. A copy of such record will be furnished the engineer prior to final acceptance. (Ord. 1960-29 § KF(10).) 16.44.230 Sewer and water main construction - Pipe laying. A. Each pipe shall be laid on an even, firm bed so that no uneven strain will come on any pipe and particular care shall be exercised to prevent the pipes bearing on the sockets. Each pipe shall be laid in conformity with the line and levels given by the engineer and in the presence of the inspector. B. The bell end of all sewer pipe shall be laid up grade. C. The interior of all pipes shall, as the work progresses, be cleared of all dirt, jointing material and superfluous material of every description. On small pipes, where cleaning after laying may be difficult, a swab or drag shall be kept in the pipe line and pulled forward past each joint immediately after its completion. D. At times when the pipe laying is not in progress, the open ends of the pipe shall be closed by approved means and no trench water shall be allowed to enter the pipe. Before commencing work and removing the end-closure device, the contractor shall prepare the trench properly by dewatering and mucking out all unsuitable materials and backfilling the trench bottom to the proper grade with satisfactory material. E. Except for PVC sewer pipe, before lowering and while suspended, the pipe shall be inspected for defects by striking with a light hammer to detect cracks. Any defective, damaged or unsound pipe shall be rejected. F. Under no circumstances shall pipe or accessories be dropped or dumped into the trench. G. All pipe shall be stored in such a fashion as to keep foreign matter from being deposited inside it. Particularly, water main pipe shall be placed along the proposed alignment so that street surface water does not carry foreign objects and possible contaminants into it. If, in the opinion of the engineer, the pipe contains dirt that will not be removed during the flushing operation, the interior of the pipe shall be cleaned and swabbed. If necessary with water mains, it shall be swabbed with a bactericidal solution made up with calcium hypochlorite, chlorinated lime or sodium hypochlorite. H. Whenever necessary to deflect water pipe from a straight line either in a vertical or horizontal plane to avoid obstructions, the degree of deflection shall be approved by the engineer. I. The contractor shall not backfill sewers until elevation and gradient of sewers and pipe joints have been checked, inspected and approved by the engineer. Water mains shall not be backfilled until testing is completed. (Ord. 1989-M-65 § 1; Ord. 1960-29 § KF(11).) 16.44.231 Sewer and water main construction - Encasement. A. Where open trench construction is not practical, boring with concurrent installation of casing pipe shall be used. This work shall be done by a specialized contractor approved by the City Engineer. B. The casing pipe shall be new, smooth wall, welded steel pipe with bituminous coating. The pipe shall have 3/8 inch minimum wall thickness and its material shall have a minimum tensile yield strength of 35,000 p.s.i. All casing pipe joints shall be welded and leak-proof. C. All water and sewer mains installed in casing pipe shall have stainless steel casing spacers as manufactured by Cascade Waterworks Manufacturing Company of Yorkville, Illinois, or equal approved by the City Council installed per manufacturing standards. D. All sanitary sewer mains in the casing pipe shall be flanged mechanical joint, ductile iron pipe as specified in Section 16.44.092. No pipe deflection is permitted. E. The encased sewer pipe shall be tested in accordance with Section 16.44.260 prior to backfilling and closing the casing ends, casing pipe joints shall be welded and leak-proof. Pressure mains shall be tested in accordance with Section 16.44.290 prior to backfilling and closing ends. Each end of the casing shall be sealed with brick and mortar. F. After connection to mains, the sewer pipe shall be again tested in accordance with Section 16.44.260. (Ord. 1997-M-103 § 1; Ord.1989-M-65 § 1.) 16.44.235 PVC sanitary sewer construction - Trench. A. Trench bottom. The soil surface at the trench bottom shall be free of any protrusions which may cause point loading on any portion of the pipe or bell, and shall provide a firm, stable and uniform support for the pipe. B. Special trench foundation. Where an unstable trench bottom condition is encountered, it shall be stabilized or alternative special trench foundation methods used. The engineer may elect to require a special foundation upon which bedding shall be provided. C. Over-excavation. During the course of construction, should the contractor inadvertently over-excavate the trench more than 6 inches below the bottom of the pipe, but less than 12 inches below the bottom of the pipe, he shall fill that area of over-excavation with IDOT CA-6 embedment material and compact to a density equal to the native soil. The contractor shall fill any area of over-excavation more than 12 inches below the bottom of the pipe with processed, crushed stone in the same manner as required above for special foundation but at his expense. D. Rock subgrade. Ledge rock, hard pan, cobbles, boulders or stone larger than 1-1/2 inches shall be removed from the trench bottom to permit a minimum bedding thickness of six (6) inches. (Ord. 1989-M-65 § 1.) 16.44.236 PVC sanitary sewer construction - Embedment materials and placement. A. See city standard drawing no. 16.44.236, attached. B. Methods of placing embedment materials:
C. Compaction by hand placement, hand tamping or dumping is not acceptable. D. The embedment shall be compacted to a minimum of 90% of Modified Proctor Density in accordance with ASTM D-2049 or other methods approved by the engineer. (Ord. 1993-M-49 § 1; Ord. 1993-M-27 § 1; Ord. 1989-M-65 § 1.) 16.44.237 PVC sanitary gravity sewer - Pipe and fitting joining. A. General procedure. Before being set in place, each component of piping shall be inspected for damage and cleaned. Damaged components shall be marked rejected. Pipe bells shall be laid on the upstream end. Sewer laying shall commence at the lowest elevation and shall terminate only at manholes, service branches or cleanouts. Trenches shall be de-watered. Whenever pipe laying is interrupted, the end of the pipe shall be temporarily plugged to prevent the entrance of water, mud or foreign matter, and the pipe shall be secured to prevent its being dislodged. B. Location and alignment. Pipe and fittings shall be embedded in the trench with the invert conforming to the required elevations, slopes and alignment, and with the pipe bottom uniformly and continuously supported by a firm bedding and foundation. As-built drawings shall locate sanitary sewer services in the right-of-way. C. Cutting and beveling pipe. For shorter than standard pipe lengths, field cuts may be made with either hand or mechanical saws or plastic pipe cutters. Ends shall be cut square and perpendicular to the pipe axis. Spigots shall have burrs removed and ends smoothly beveled by a mechanical beveler or by hand with a rasp or file. Field spigots shall be stop-marked with felt tip marker or wax crayon for the proper length of assembly insertion. The angle and depth of field bevels and lengths to stop-marks shall be comparable to factory pipe spigots. (NOTE: For pipe manufactured in accordance with ASTM F-679, the pipe manufacturer shall be contacted for specific cutting and beveling instructions.) D. Assembly of joints. Assemble all joints in accordance with recommendations of the manufacturer. If a lubricant is required to facilitate assembly, it shall have no detrimental effect on the gasket or on the pipe when subjected to prolonged exposure. Proper jointing may be verified by rotation of the spigot by hand or with a strap wrench. If unusual joining resistance is encountered or if the insertion mark does not reach the flush position, disassemble the joint, inspect for damage, reclean the joint components and repeat the assembly steps. NOTE: Fitting bells may permit less insertion depth than pipe bells. (NOTE: When mechanical equipment is used to assemble joint, care should be taken to prevent over-insertion.) E. Branch fittings. Fittings for service branches in new construction shall be molded with all gasketed connections. Fabricated fittings are not acceptable. Taps into existing lines shall use a gasketed fitting in conjunction with a repair sleeve coupling or a gasketed saddle wye or tee with all stainless steel clamps. When connecting to an existing sewer main by means other than an existing wye or tee, one of the following methods shall be used:
F. Building Services:
G. Pipe Caps and Plugs. All caps and plugs shall be braced, staked, anchored, wire-on or otherwise secured to the pipe to prevent leakage and/or loss under the maximum anticipated thrust from internal abnormal operating conditions such as test pressures from water or air. H. Manholes. Manhole connections shall be made as follows:
All manhole connections shall be made using proper water stops. If Portland cement group is incorporated in the manhole connection, the grout shall be of a type that expands, rather than shrinks, upon curing. Water stops shall be installed in accordance with manufacturer's recommendations. Hinged connections which use short pipe bell stubs outside the manhole face will not be required to prevent shear breakage in PVC sewer pipe because of its flexibility. Direct bonding between PVC pipe and concrete manhole is not allowed. The hold shall be created by a core in the manhole wall. (Ord. 1993-M-27 § 2; Ord. 1989-M-65 § 1.) 16.44.240 Sewer construction, VCP sewer joints. A. Joints between co | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
