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or City standards. The developer shall provide for <br />soil bearing investigations to determine foundmtion <br />requirements. Pilings for culvert support shall be <br />provided if needed. Ample waterway, shall be <br />provided for in culvert design, based on five (5) <br />year storm recurrence and the drainage area served <br /> <br />Ail engineering calculations, including soil test results, <br />shall be furnished to the City Engineer with ~quire<~ <br />submittals. Approval by the City Engineer shall not release <br />the developer from The requirements for a safe and functional <br /> <br />The developer shall be required to furnish all <br />pertaining To bridges and culverts which shall <br />necessary by the city Engineer. <br /> <br />other data <br />be deemed <br /> <br />The cost cf all physical improvements required by the pro-- <br />visions of this section shall be paid by the subdivider. If <br />the actual installation of improvements is not completed <br />prior to the application made for final plat approval, the <br />subdivider shall execute and file with the City Engineer an <br />agreement and bond in an amount equal to the estimated costs <br />(as established by the City) of such improvements, plus ~en <br />percent, guaranteeing that the required improvements will be <br />properly and satisfactorily installed within a reasonable <br />length of time~ but, in no evenT, more than two {2) years. <br />An irrevocable letter of credit issued by a bank in a form <br />approved by the City Attorney or a depoeit of funds in escrow <br />may be accepted in lieu of bond under the same terms and <br />conditions applicable to bonds. The bond. letter of credit <br />or deposit may be released by the City when specific <br />improvements ~over~d by the bond have been completed and <br />approved by the City Engineer as being in accordance with <br />City standards and specifications. <br /> <br />Upon written request by the subdivider to the City engineer, <br />periodic partial releases of the bond, letter of credit, <br /> <br />accumulative amount equal to no less than 80% of the original <br /> <br />performance guarantee. Periodic partial releases shall be <br />based upon the percentage of facilities completed and <br />accepted by the City Engineer. Periodic partial releases may <br />not occur before the completion of at least 30% of the <br />facilities. The City Engineer shall not be required to <br />approve more than three periodic partial releases in any <br />twelve month period. Within 30 days after receipt of a <br />written notice from the subdivider for a periodic pmrtial <br /> <br />PORTSMOUTH SUBDIVISION ORDINANCE --- PAGE 16 <br /> <br /> <br />