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<br />. <br /> <br />.. <br /> <br />, ,) <br /> <br />and a plasticity index of less than 6 when tested in accordance with <br />ASTM D423 and ASTM D424. <br />c. Compact to 95% Standard Proctor Density (ASTM, D2922-78 and <br />ASTM D3017-78) in lifts of 8 inches thick. Actual testing may be <br />required as deemed necessary by the City of La Porte. . <br />d.' The cement-sand mixture shall consist of at least 1 Yz sacks -of cement <br />per cubic yard of sand. The cement-san mixture shall have a minimum <br />unconfined compressive stren,gth of 100. psi in 48 hours when <br />compacted to 95% of Standard Proctor DensilY (ASTM D2922-78 and <br />'ASTM D3017-78), without additional moisture control, cured and <br />, tested in accordance with ASTL C31. <br /> <br />5. Backfill excavated areas and trenches under or within one' foot of existing or <br />proposed pavement with cement-stabilized sand from the top of the pipe <br />embedment zone up to one foot below the paving subgrade. The cross-section <br />described in this paragraph is defmed as the embedment zone. <br />6. The proposed location of any special backfill shall be shown by stations in the <br />dra~ings in both plan and profile views. , <br />'7. 'Public"sewers and force mains shall be located in either the public right-of-~ay <br />or easements. 'Side lot easements sha,ll be avoided at all costs and shall ,be <br />granted special approval only when a right-of-way located sewer is impossible <br />from an economic and engineering standpoint. New and future proposed <br />backlot easements shall not be accepted. Generally the location of the public <br />. sewer within a dedicated easement shall be along the centerline of the proposed <br />easement. However, in those instances where the easement is adjacent to the ' <br />. public right-of-way, the lateral location of the 'sanitary sewer shall be approved <br />on a case by case basis by the City. <br /> <br />.. <br />.i <br /> <br />a. <br /> <br />Street Right-of-way <br /> <br />(1) Sanitary sewers with a maximum depth of ten feet (10' <br />measured from fmished grade, shall be placed within the right- <br />, of-way at least ~ feet from the right-of-way line. All sewers <br />that are deeper than 10 feet shall be centered in an exclusive <br />easement parallel and adjoining the right-of-way. Where <br />required, additional easement shall be provided adjoining the <br />right-of-way to provide,clearances. <br /> <br />b. Easements <br /> <br />(1) The maximum depth ofSe~er in a side lot easement ,shall be 8 <br />feet. <br /> <br />8. The .final determination as to that portion of a street, alley, or easement to be <br />occupied by a proposed sewer rests with the City. The City will take .into <br />consideration existing, plarined and proposed facilities such 'as manholes, <br />pavement, pipes/conduits, along with existing trees and shrubs, or other unique <br />surface conditions when arriving at a decision. ' , <br />9. There shall be nO'closed-end easements for sanitary sewers. <br />10. The drawings of the sewer shall show the location ofaoy existing kno~ pipe or <br />duct that, might interfere with the construction of the sewer and call to th,e <br />attention. of the' City any known obstacles that might be encountered ,in <br />constructing the sewer in any location under consideration. The Professional <br />Pngineer shall determine the existence of pipes, ducts, obstacles and other <br />utilities (i.e. gas, telephone, electric and cable) from a visual survey on the <br />ground plus research of the public records and private records when available. <br /> <br />Sanitary Sewer:Design Criteria Page S of 10 <br />