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I I
<br /> NOTES
<br /> 1. W=MAXIMUM WIDTH OF TRENCH.FOR PIPES 15"OR
<br /> LESS IN DIA W=40".FOR PIPES 18"OR GREATER W=1.5 X
<br /> EXISTING O 0 O 0 0 I.D.+18".PIPE MUST BE CENTERED IN TRENCH.
<br /> fPAVEMENT 2. ALTERNATE SLOPING TRENCH WALL TO MEET O.S.H.A.
<br /> 6" REQUIREMENTS(NO SLOPES STEEPER THAN 1:1 EXCEPT
<br /> � �������� 18"MIN FOR ROCK).
<br /> s 3. SUITABLE NATIVE MATERIAL OR IMPORTED GRAVEL
<br /> 11 ♦♦•,►�•♦♦•�••♦♦♦♦♦�♦•♦♦ _ _ ( r--rr BORROW AS DIRECTED.COMPACT TO 90%MAXIMUM
<br /> VI I I p I Iil I 1 II I I III I 1�1- 1 I !--I i I-—I I I�'_II ni.,'. . ' DENSITY.
<br /> bj 2 —I I /'/
<br /> I IIII—I/—III—III I I i— 4. FOUNDATION GRAVEL IF REQUIRED BY THE ENGINEER TO
<br /> a i—III III— II--
<br /> // I 1 REPLACE UNSUITABLE MATERIAL.SHALL BE FOUNDATION
<br /> ae O 2 ' I I _III / MATERIAL CLASS A,B OR AS APPROVED BY THE
<br /> °'"2 -III I ,I IIII1 // 1 COMPACTION ENGINEER.
<br /> c za j © 1 I .�#4„O+„O4, �I I4 PROVIDE UNIFORM SUPPORT UNDER PIPE 5. IF DIRECTED BY THE ENGINEER THE TOP THREE TO FIVE
<br /> f$..$frP $
<br /> © FEET OF BACKFILL SHALL BE IMPORTED GRAVEL BORROW
<br /> / BARREL. OR SUITABLE NATIVE MATERIAL COMPACTED TO 95%
<br /> MAXIMUM DENSITY.
<br /> —I = HAND TAMP UNDER PIPE HAUNCHES FOR ALL
<br /> �, �, BEDDING MATERIALS.
<br /> v0 F�,,,�,,,� (I I—i 6. SEE CITY OF EVERETT STANDARD DWG 326 FOR
<br /> t, �, �, ALL BACKFILL MATERIAL SHALL BE PLACED IN PAVEMENT PATCH DETAILS.
<br /> /4,5,�,O,� I (- LIFTS NOT TO EXCEED SHALES BEFORE
<br /> ��,�,�,�,�, III-I COMPACTION UNLESS AUTHORIZED BY THE 7. VERTICAL TRENCH WALLS WITH SHORING TO CONFORM
<br /> A,4*,,�,A. —III ENGINEER DUE TO THE CHARACTER OF THE TO O.S.H.A.REGULATIONS.
<br /> .,
<br /> O �,�I.,,1I.,, I I— MATERIAL AND THE COMPACTING EQUIPMENT.
<br /> ,�, �, 8. SUBGRADE OR GROUND SURFACE IN NON-PAVED AREAS.
<br /> ',,�,�,,,, UPPER LIMIT OF COMPACT BEDDING MATERIAL TO 90%
<br /> © �, �, MAXIMUM DENSITY EXCEPT DIRECTLY OVER 9. EXCAVATED NATIVE MATERIAL OR STOCKPILED BACKFILL
<br /> 7
<br /> PIPE ZONEMATERIAL.
<br /> / ,..,,i,/, PIPE,HAND TAMP ONLY.MECHANICAL
<br /> COMPACTION OF BACK FILL MATERIAL SHALL
<br /> NOT BEGIN UNTIL THE DEPTH OF COMPACTED 10. FOR ALL TRENCHING TRANSVERSE TO THE ROADWAY
<br /> MATERIALS ,-.1BACKFILL MATERIAL IS 2 FEET ABOVE THE TOP BACKFILL ABOVE THE PIPE ZONE SHALL BE CONTROLLED
<br /> OF PIPE. DENSITY FILL.SEE SECTION 3-9.6&3-20.1 OF THESE
<br /> PIPE BEDDING MATERIAL SHALL BE STANDARDS.
<br /> CRUSHED SURFACING BASE COURSE _ EACH LIFT SHALL BE MECHANICALLY
<br /> CONFORMING TO SECTION 9-03.9(3) _ 0 COMPACTED TO THE REQUIRED DENSITY PRIOR 11. FOR UTILITY CUTS SUCH AS GAS,TELEPHONE,POWER,
<br /> OF THE STANDARD SPECIFICATIONS I TO PLACING SUBSEQUENT LIFTS OF BACKFILL AND CABLE TV LONGITUDINAL TO THE ROADWAY,
<br /> g FOR ROAD,BRIDGE AND MUNICIPAL I MATERIAL. BACKFILL SHALL BE CONTROLLED DENSITY FILL.SEE
<br /> ? CONSTRUCTION WSDOT/APWA. _I I ( SECTION 3-9.5 OF THESE STANDARDS.
<br /> O� COMPACTION TESTS SHALL BE AS REQUIRED BY
<br /> OVER EXCAVATION AND PLACEMENT I—I����������1�• THE CITY ENGINEER,BUT IN NO CASE LESS THAN
<br /> 1 OF FOUNDATION MATERIAL,IF _I I I_ jjj�j������j� 2 TESTS EVERY 200 FEET OF TRENCH(ONE AT
<br /> REQUIRED SHALL BE FOUNDATION ������������ LOWER LIMIT SUBGRADE AND ONE AT 50%OF TRENCH
<br /> MATERIAL CLASS A OR B I—I�������������� OF PIPE ZONE DEPTH).
<br /> CONFORMING TO SECTION 9-03.17 _ _
<br /> t5 OF THE STANDARD SPECIFICATIONS 'I I I I I (~ I ( IN PLACE DENSITY AND MOISTURE CONTENT
<br /> R FOR ROAD,BRIDGE AND MUNICIPAL W(SEE NOTE1) I O WILL BE DETERMINED USING NUCLEAR
<br /> g CONSTRUCTION WSDOT/APWA. '1 METHOD,ASTM 2922-71. M. PUBLIC WORKS
<br /> LABORATORY MAXIMUM DRY DENSITY AND ` WASHINGTON
<br /> E V E R E T T
<br /> DEPARTMENT
<br /> oz OPTIMUM MOISTURE CONTENT WILL BE "'gYAN5A55 IOAVIDVOIGT IuPAVLWILHEIM IRMESH
<br /> DETERMINED USING THE MODIFIED PROCTOR 12/11/2019
<br /> METHOD IN ACCORDANCE WITH ASTM D-15S7. ..
<br /> P TYPICAL TRENCH SECTION 614
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