2020-11-17_REVISION - M1977342 ‎(4)‎

• Permit No: M1977342
• IBM Index Class Name: Revision
• Doc Date: 11/17/2020
• Doc Name: Certification of Construction
• From: Climax Molybdenum
• To: DRMS
• Type & Sequence: TR30
• Email Name: PSH
• Email Name: JLE
• Media Type: D
• Archive: No

EARTHWORK SPECIFICATIONS:
1. ELEVATIONS AND ROAD WIDTHS ARE BASED ON LIMITED SURVEY DATA AND MAY NOT REFLECT ACTUAL CONDITIONS IN THE FIELD AT ALL LOCATIONS.
2. WET SUBGRADE SURFACES IMMEDIATELY PRIOR TO FILL OR ROADBASE PLACEMENT.THE SUBGRADE SHALL BE PROOF-ROLLED WITH A MINIMUM OF TWO(2)
COVERAGES OF APPROVED COMPACTION EQUIPMENT.
3. PRIOR TO PLACING STRUCTURAL BACKFILL ON ROAD SURFACES,SCARIFY THE TOP SIX(6)INCHES OF SUBGRADE MATERIAL.
4. SELECT EMBANKMENT FILL SHALL BE A MIXTURE OF FINES,SAND,AND GRAVEL WITH A MAXIMUM PARTICLE SIZE OF SIX(6)INCHES,A MIN.OF 50%PASSING THE
NO.4 SIEVE,A MIN.OF 15%PASSING THE NO.200 SIEVE, AND SHALL BE GENERALLY FREE OF PEAT,TWIGS,GRASS, OR LESS THAN THREE(3%)ORGANIC
MATERIAL BY WEIGHT.SELECT EMBANKMENT FILL SHALL BE FREE OF DELETERIOUS MATERIALS,DEBRIS,AND TRASH.SELECT EMBANKMENT FILL FILL SHALL BE
FURNISHED FROM ON-SITE EXCAVATED MATERIALS. BORROW SOURCES FOR SELECT EMBANKMENT FILL SHALL BE AS SHOWN ON THE DRAWINGS OR APPROVED
BY THE ENGINEERING DEPARTMENT.
4. EMBANKMENT FILL SHALL BE A MIXTURE OF FINES,SAND,AND GRAVEL WITH A MAXIMUM PARTICLE SIZE OF SIX(6)INCHES, AND SHALL BE GENERALLY FREE OF
PEAT,TWIGS,GRASS, OR LESS THAN THREE(3%)ORGANIC MATERIAL BY WEIGHT.SELECT EMBANKMENT FILL SHALL BE FREE OF DELETERIOUS MATERIALS,
DEBRIS,AND TRASH.SELECT EMBANKMENT FILL FILL SHALL BE FURNISHED FROM OWSITE EXCAVATED MATERIALS. BORROW SOURCES FOR SELECT ESTIMATED BILL OF MATERIALS
EMBANKMENT FILL SHALL BE AS SHOWN ON THE DRAWINGS OR APPROVED BY THE ENGINEERING DEPARTMENT.
5. SELECT EMBANKMENT FILL AND EMBANKMENT FILL SHALL BE PLACED IN HORIZONTAL LIFTS NOT EXCEEDING A THICKNESS OF EIGHT(8)INCHES BEFORE
COMPACTION.STRUCTURAL FILL SHALL BE COMPACTED TO A MINIMUM OF NINETY-FIVE PERCENT(95%)OF THE MODIFIED PROCTOR DRY DENSITY IN MATERIAL UNIT OF MEASURE QTY.
ACCORDANCE WITH ASTM D1557. IN-PLACE MOISTURE CONTENT OF STRUCTURAL FILL SHALL BE WITHIN TWO PERCENT(2%)OF THE OPTIMUM MOISTURE
CONTENT AS DETERMINED BY ASTM D1557. SELECT EMBANKMENT FILL VOLUME(COMPACTED CY) 2360
6. IN-PLACE DENSITY AND MOISTURE TESTS SHALL BE PERFORMED BY AN OWNERS REPRESENTATIVE FOR EVERY 500 CY OF STRUCTURAL FILL OR ONE TEST PER
LIFT,WHICHEVER IS MORE FREQUENT.GRADATION ANALYSES FOR IMPORTED MATERIAL SHALL BE SUBMITTED TO THE ENGINEER FOR EVERY 500 CY OF EMBANKMENT FILL VOLUME(COMPACTED CY) 13250
STRUCTURAL FILL.
7. AN APPROVED METHOD SPECIFICATION FOR COMPACTION MAY BE USED IN LIEU OF IN-PLACE DENSITY TESTS. THE METHOD SPECIFICATION WILL BE DEVELOPED ROAD BASE(COURSE) VOLUME(COMPACTED CY) 1980
BY THE ENGINEER AND BASED ON THE ACTUAL COMPACTION EQUIPMENT TO BE USED BY THE CONTRACTOR. THE ENGINEER RESERVES THE RIGHT TO PERFORM
ADDITIONAL DENSITY TESTING AT ANY TIME TO VALIDATE THE USE AND EFFECTIVENESS OF THE APPROVED METHOD SPECIFICATION. 12 SF CONCRETE BLOCKS COUNT 12
8. ROAD BASE(COURSE)SHALL CONFORM TO STANDARD SPECIFICATIONS FOR ROAD AND BRIDGE CONSTRUCTION,COLORADO DEPARTMENT OF TRANSPORTATION, 42"DIA.DR 17 HOPE PIPE LENGTH(FEET) 25
2011(OR LATEST EDITION),SECTION 703.03: AGGREGATES FOR BASES,CLASS 5 AGGREGATE BASE COURSE,AND SHALL CONSIST OF THE FOLLOWING GRADING
REQUIREMENTS: CONCRETE VOLUME(CY) 6
SIEVE SIZE PERCENT PASSING(BY WEIGHT) -"CRUSHED ROCK VOLUME(CY) 30
1}INCH 100 *TABLE NOT UPDATED WITH AS-BUILT QUANTITIES
1 INCH 95-100
NO.4(4.75 MM) 30-70
NO.200(0.075 MM) 3-15
8. ROAD BASE(COURSE)SHALL BE SPREAD IN SUCH A MANNER AS TO ENSURE A SMOOTH,UNIFORM LAYER AND TO AVOID SEGREGATION.BASE COURSE SHALL BE
PLACED IN SIX(6)INCH THICK LOOSE LIFTS AND COMPACTED WITH A MINIMUM OF FOUR(4)COVERAGES OF AN APPROVED VIBRATORY SMOOTH-DRUM
COMPACTOR. THERE ARE NO COMPACTION OR MOISTURE DENSITY REQUIREMENTS FOR THE BASE COURSE.
9. REMOVE CONCRETE JERSEY BARRIERS FOR CONSTRUCTION OF RAISE.PLACE ON ROAD SURFACE UPON COMPLETION.REPLACE BARRIERS AS NEEDED.CONCRETE
BARRIERS SHALL BE PRECAST TYPE 7.
10. BLUE STAKE PERMITS MUST BE ACQUIRED PER HENDERSON MILL POLICIES PRIOR TO BEGINNING OF WORK.
11. CLEARING OF VEGETATION AND TOPSOIL STRIPPING TO A MIN.DEPTH OF 6 INCHES(6")SHALL OCCUR,WHERE APPLICABLE,PRIOR TO PLACEMENT OF FILL AND
BEFORE DEVELOPMENT OF FILL FROM BORROW AREAS.ADJUST STRIPPING DEPTH IF REQUIRED TO REMOVE ALL TOPSOIL.UPON COMPLETION OF THE FILL
PLACEMENT,SPREAD TOPSOIL EVENLY ON SLOPES AND RESEED.
PRECAST MODULAR BLOCK SPECIFICATION:
1. BLOCKS SHALL BE 12 SF,NOMINAL 2 FOOT HIGH x 6 FOOT LONG x 2 FOOT DEEP.
2. DIMENSION TOLERANCE SHALL BE+/-j INCH FOR HEIGHT,+/-} FOR LENGTH AND+/-1 INCH FOR WIDTH.
3. CONCRETE FOR BLOCKS SHALL HAVE A MINIMUM 28-DAY COMPRESSIVE STRENGTH OF 4,000 PSI. ENTRAINED AIR CONTENT SHALL BE BETWEEN 5 AND 7%.
4. REINFORCING SHALL HAVE A MINIMUM YIELD STRENGTH OF 60 KSI. MINIMUM CLEAR COVER TO REINFORCEMENT SHALL BE 1}INCHES.
5. BLOCK SUPPLIED BY PEAK MATERIALS.
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