11. SEWER TRENCH BACKFILL AND REPAIR CRITERIA:
FOR TRENCHES OUTSIDE OF EXISTING OR FUTURE RIGHT-OF-WAY
- A.BACKFILL TRENCH, PER STANDARD SPECIFICATIONS SECTION 306-1.3, AND REPLACE OTHER EARTH REMOVED SO AS TO ACHIEVE THE NATURAL OR FINISH GRADES AND SLOPES REQUIRED AND APPROVED FOR THIS PROJECT BY THE CITY ENGINEER.
- B.ALL BACKFILL EARTH REPLACED SHALL BE COMPACTED TO A MIN. OF 90% OF MAXIMUM DENSITY PER ASTM D 698-57T, AS MODIFIED. ACCEPTABLE CERTIFICATION OF COMPACTION SHALL BE SUBMITTED TO THE CITY ENGINEER, PRIOR TO THE ISSUANCE OF A CERTIFICATE OF PARTIAL ACCEPTANCE.
FOR TRENCHES WITHIN EXISTING OR FUTURE RIGHT-OF-WAY
- A.BACKFILL TRENCH AND REPAIR PAVEMENT PER STANDARD SPECIFICATIONS SPECTION 306-1.3 AND CITY OF PALMDALE STANDARD NO. M-6.1 AND M-6.2, AS APPLICABLE, WITHIN CITY OF PALMDALE JURISDICTION SO AS TO ACHIEVE THE EXISTING OR PROPOSED GRADES REQUIRED AND APPROVED FOR THIS PROJECT BY THE CITY ENGINEER.
- B.WITHIN STATE HIGHWAY OR RAILROAD JURISDICTION, BACKFILL TRENCH AND REPAIR PAVEMENT IN ACCORDANCE WITH REQUIREMENTS OF THE PERMITS AND PER LA COUNTY STANDARD PLAN 3081-0 (FOR STATE HIGHWAY).
- ALL WYES AND/OR HOUSE LATERAL SEWERS ARE TO BE LOCATED AT LEAST FIVE FEET APART AND NOT CLOSER THAN FIVE FEET TO ANY MANHOLE.
- ALL SADDLE CONNECTIONS TO CITY OWNED MAINLINE SEWER ARE TO BE PERFORMED BY LA COUNTY DEPARTMENT OF PUBLIC WORKS SEWER MAINTENANCE UNLESS SAID DEPARTMENT HAS APPROVED SAID CONNECTIONS TO BE PERFORMED BY CONTRACTOR. CONTRACTOR SHALL NOTIFY SEWER MAINTENANCE 48 HOURS PRIOR TO REQUIRING CONNECTIONS.
- IF DURING THE COURSE OF CONSTRUCTION IT IS DETERMINED, AND IS NOT ADDRESSED BY THE PLANS, THAT THERE IS LESS THAN FOUR FEET OF COVER OVER THE TOP OF A MAIN LINE OR HOUSE LATERAL SEWER, OR A POWER POLE IS WITHIN THREE FEET, THE PIPE SHALL BE ENCASED PER LA COUNTY STANDARD PLAN 2023-1, CASE II, UNLESS OTHERWISE APPROVED BY THE CITY ENGINEER.