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r <br /> elevation shall be a minimum of 12-inches above the associated elevations ,. <br /> shown on the FIRM ( Flood Insurance Rate Map) or 12 inches above the 25-year <br /> — 24-hour storm event elevation , whichever is greater. <br /> r <br /> I . In IRCDUS maintained lift station , pumps shall be per the Approved <br /> Manufacturer's Product List. If a grinder pump is proposed , see Approved <br /> Manufacturer's Product List. Only grinder pumps under 10 . 0 hp are permitted _ <br /> unless approved by IRCDUS . <br /> J . Lift Station Calculation Checklist (all assumptions shall be listed in calculations <br /> and in an orderly fashion) : r <br /> 1 . Design flow <br /> 2. Downstream force main size & down stream head pressure (in psi or feet r <br /> of water) <br /> 3. TDH of pumps shall exceed system head curve <br /> 4 . Pump selection make, model , HP , impeller r <br /> 5 . a. Wet well dimensions <br /> b . Operating cycle and draw down time <br /> 6 . Buoyant computations Documentation: r <br /> a . Buoyant force <br /> b. Downward force <br /> c. Safety factor _ <br /> d . Depth to water table <br /> 7. Designer name, date , design firm, Indian River County project number, <br /> project name, designer name of revisions <br /> r <br /> K. Only one influent gravity main is allowed into the lift station . The first upstream <br /> manhole from the lift station must be located within 20 feet +/- 1 -foot of the lift <br /> station and as approved by IRCDUS . <br /> L. The owner of a private lift station must have a maintenance agreement with a <br /> qualified firm (individual) to maintain the lift station . A label must be posted on r <br /> the lift station stating the name and 24-hour phone number of the responsible <br /> firm before lift station may be placed into operation . A copy of a maintenance <br /> contract is to be submitted prior to issuance of the Utility Construction Permit. r <br /> Maintenance contract must be renewed annually with copies of said contract <br /> submitted to IRCDUS. Owners of private lift stations shall submit a letter to <br /> IRCDUS acknowledging that the lift station is substandard to the County <br /> r <br /> Standard lift station . <br /> 11 . 03 WATER DISTRIBUTION <br /> r <br /> A. All water mains shall be constructed in accordance with the Indian River County <br /> Water Master Plan , latest edition , or current AWWA Standard Specifications and <br /> current regulatory agencies requirements. r <br /> B . All distribution systems shall be properly looped , where feasible , and valved to <br /> provide maximum flexibility in providing service . r <br /> r <br /> 11 - 3 <br />