Amendment 0001 Plans - AC-908579_HWY-257 - Full-Size.pdf

DEPARTMENT OF TRANSPORTATION AND PUBLIC WORKS

COMMONWEALTH OF PUERTO RICO

DATE

DATE

DATE

DATE

DATE

DR. ANGEL J. ALICEA RODRIGUEZ

LISSETTE LUGO COLON

CARLOS A. LLOVERAS MATTEI

MARIA I. AYALA RIVERA

DATE

DR. ANGEL J. ALICEA RODRIGUEZ

DR. EDWIN E. GONZALEZ MONTALVO, PE

HIGHWAY P.R. 155

LANDSLIDE AND ROAD DAMAGE

EVALUATION AND REPAIR

RECOMMENDATIONS

KM. 36.15

MUNICIPALITY OF MOROVIS PUERTO RICO

A.C. CODE NO. (908579)

ORACLE NO. (RCN9080579)

SITE "J"

ER-HWY-257

PR-155 KM.36.15

X=204401.23,Y=249055.73

FINAL PLAN 100%

PR-155

STATE ROAD

SITE "J"

ER-HWY-257

PR-155 KM. 36.15

FLASHING ARROW PANEL

FLAGGER

(SEQUENTIAL CHEVRON)

TRAFFIC SIGN LOCATION

TRAFFIC FLOW

WORK AREA

LOCATION NUMBER

CODE NUMBER

LEGEND:

FLASHING ARROW PANEL

ARROW PANEL SUPPORT OR

TRAILER (SHOWN FACING DOWN)

FLASHING ARROW PANEL

(CAUTION MODE)

WORK VEHICLE

SHADOW VEHICLE

SHADOW VEHICLE WITH

TMA AND FLASHING ARROW

PORTABLE CHANGEABLE

MESSAGE SIGNS (PCMS)

LOCATION

PCMS - X

OVERHEAD STRUCTURE

CANTILEVER STRUCTURE

BUFFER

(Mts.)

12'=3.65 Mts.

MPH

Taper lenght (L)

RURAL

A B

100m.

150m.

100m.

150m.

ROAD 155

C

100m.

150m.

DISTANCE BETWEEN SIGNS

L = ( Mts. )

38 (USE 40M.)

and Buffer

Space for a typical lane of

3.65 mts.

<20

TAPER

ONE LANE TRAFFIC

CONCRETE BARRIERS

PLASTIC DRUMS

5.0M.

TYP.

55 GALS.

GENERAL NOTES:

1. NO WORK OTHER THAN MOBILIZATION, TRAFFIC CONTROL AND PROJECT OFFICE, SHALL BE PERFORMED

UNTIL THE PROGRESS SCHEDULE IS APPROVED BY THE ENGINEER.

2. ALL TEMPORARY CONTROL DEVICES SHALL COMPLY WITH THE SUPPLEMENTAL SPECIFICATION NUMBER

638-"MAINTENANCE AND PROTECTION OF TRAFFIC" OF THE STANDARD SPECIFICATION FOR ROAD AND BRIDGE

CONSTRUCTION, 2005 EDITION.

3. EQUIPMENT, MATERIALS AND OTHER DEVICES USED FOR CONSTRUCTION SHALL BE REMOVED FROM THE

ROADWAY AFTER WORK HOURS AND SHALL BE STAGED A MINIMUM OF 10 METERS FROM THE TRAVEL WAY.

4. THE DRUM SPACING SHALL BE 5 METERS.

5. ANY ALTERATION TO THE SCHEDULE THAT MAY IMPROVE TRAFFIC OPERATIONS WITHIN THE CONSTRUCTION

AREA, IN ACCORDANCE WITH THE CURRENT MUTCD AND WITH NO ADDITIONAL COST TO THE AUTHORITY, SHALL BE SUBMITTED TO THE ENGINEER AT LEAST TWENTY ONE(21) CALENDAR DAYS IN ADVANCE TO THE

PROPOSED DATE OF IMPLEMENTATION FOR REVIEW. IF THE PROPOSED ALTERATION IS APPROVED IT SHALL

BE IMPLEMENTED AS DIRECTED BY THE ENGINEER.

6. THE CONTRACTOR CAN PERFORM, WITH THE APPROVAL OF THE ENGINEER, SEVERAL SIMULTANEOUS

ACTIVITIES WITHIN A PHASE, AND AS PERMITTED BY THE CONTRACT PROPOSAL QUANTITIES ON THE TRAFFIC

CONTROL ITEMS.

7. THE CONTRACTOR SHALL COORDINATE WITH THE ENGINEER THE INSTALLATION OF TEMPORARY TRAFFIC

CONTROL DEVICES FOR EACH PHASE AT LEAST FOURTEEN (14) CALENDAR DAYS IN ADVANCE FOR THE

RELEASE OF PUBLIC NOTICE. THE CONTRACTOR SHALL NOT COMMENCE ANY OF THE CONSTRUCTION PHASES

WITHOUT A PUBLIC NOTICE IS ISSUED OR WITHOUT DIRECT CONSENT FROM THE ENGINEER.

8. THE CONSTRUCTION SIGNS INSTALLATION SHOULD BE IN ACCORDANCE TO THE TEMPORARY TRAFFIC SIGNS

MOUNTING DETAILS, SHEET NO. MPT-23 OF THE PRHTA STANDARD DRAWING REV. JUNE 2012.

9. THE USE, LOCATION AND MESSAGES OF THE PORTABLE CHANGEABLE MESSAGE SIGN (PCMS) SHALL BE

ONLY AS DIRECTED BY THE ENGINEER.

10. THE CONTRACTOR SHALL FURNISH TEMPORARY TRAFFIC CONTROL DEVICES THAT MEET THE NATIONAL

COOPERATIVE HIGHWAY RESEARCH PROGRAM REPORT (NCHRP) CURRENT CRITERIA FOR THE APPLICABLE

CRASH WORTHINESS STANDARD.

11. ALL EXISTING SIGNS AND TRAFFIC CONTROL SIGNS DETERMINED BY THE ENGINEER TO BE UNNECESSARY

FOR THE APPLICABLE CONSTRUCTION OPERATION SHALL BE IMMEDIATELY COVERED IN ITS ENTIRETY WITH

NON ABRASIVE MATERIAL AND SHALL BE INSPECTED DURING DAY AND NIGHT TIME TO ENSURE THAT THE SIGN

IS NOT READABLE. THIS WORK IS A SUBSIDIARY OBLIGATION OF THE CONTRACT UNDER EXISTING PAY ITEMS.

12. DURING THE CONSTRUCTION OPERATIONS, THE CONTRATOR SHALL TAKE ALL THE NECESSARY

PRECAUTIONS AND MEASURES TO AVOID FALLING DEBRIS, TOOLS, EQUIPMENT OR ANY OTHER MATERIALS

INTERFERE OR IMPACT THE MOTORING PUBLIC IN THE ROADWAY. ALL THE MATERIALS, LABOR EQUIPMENT, AND WORK NECESSARY FOR IMPLEMENTING THIS REQUIREMENT IS SUBSIDIARY OBLIGATION OF THE

CONTRACT UNDER EXISTING PAY ITEMS.

13. THE CONTRACTOR SHALL MAINTAIN ACCESS AT ALL TIMES TO ADJACENT PROPERTIES DURING

CONSTRUCTION. THIS WORK WILL REQUIRE COORDINATION WITH BUSINESSES AND PRIVATE OWNERS. ALL THE

MATERIALS, LABOR, EQUIPMENT, AND WORK NECESSARY FOR IMPLEMENTING THIS REQUIREMENT IS

SUBSIDIARY OBLIGATION OF THE CONTRACT UNDER EXISTING PAY ITEMS.

14. TEMPORARY CONCRETE BARRIER END SECTION SHALL COMPLY WITH DRAWING NO. MPT-03 OF THE PRHTA

STANDARD. DRAWING REV. JUNE 2012, AND USE AT TRAFFIC SIDE.

15. NO EXCAVATION AND/OR PAVEMENT DROP-OFF SHALL REMAIN OPEN WITHIN THE TRAVELED WAY WHEN

THE CONTRACTOR OR ITS PERSONNEL IS NOT WORKING AND PHYSICALLY PRESENT AT THE WORK SITE.

16. IN CASE THAT THE WORKS AFFECTED THE EXISTING LUMINARY THE CONRACTOR SHALL PROVIDE

ADEQUATE ILLUMINATION IN THE AFFECTED AREA BUT THE GLARE OF THE SAME NO AFFECT THE VISIBILITY OF

THE DRIVERS.

17. TEMPORARY CONCRETE BARRIER SHALL BE USED TO PROTECT VEHICULAR TRAFFIC FROM EXCAVATION

OR PAVEMENT DROP-OFF AREAS EQUAL OR GREATER THAN 0.30 METERS DEEP THAT WILL REMAIN OPEN FOR

A DURATION OF MORE THAN ONE DAY, AS APPROVED BY THE ENGINEER.

18. IN ALL CONSTRUCTION OPERATIONS UNDER THIS CONTRACT, ALL PRECAUTIONS SHALL BE EXERCISED IN

ORDER THAT THE MOVEMENT OF EQUIPMENT AND CONSTRUCTION WORK SHALL BE PERFORMED IN SUCH A

WAY AS TO AVOID UNNECESSARY INCONVENIENCES TO TRAFFIC.

19. PROVISIONAL SIGNING AND TRAFFIC CONTROL SHALL BE AS PROVIDED IN PART 6 "TEMPORARY TRAFFIC

CONTROL" OF THE MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (M.U.T.C.D), 2009 EDITION.

20. ALL TRAFFIC CONTROL DEVICES SHALL BE CLEANED, REPAINTED, REFLECTORIZED OR REPLACED AS

NECESSARY TO PROVIDE ADEQUATE VISIBILITY AND LEGIBILITY AT ALL TIMES.

21. THE PUERTO RICO HIGHWAY AND TRANSPORTATION AUTHORITY IT DOES RESERVES THE RIGHT TO STOP

THE WORKS AT ANY TIME IF THE CONTRACTOR DO NOT COMPLY WITH THE MAINTENANCE OF TRAFFIC AND THE

SAFETY REGULATIONS.

22. TEMPORARY CONTROL TRAFFIC CONTROL DEVICES SHALL MEET MASH STANDARD

CONSTRUCTION SCHEDULE

THE FOLLOWING CONSTRUCTION SCHEDULE AND SPECIAL INSTRUCTIONS SHALL BE FOLLOWED, IN

ORDER TO MAINTAIN TRAFFIC FLOW WITH "THE LEAST POSSIBLE INTERFERENCE FROM

CONSTRUCTION OPERATIONS".

TYPICAL APPLICATIONS ARE SUMITTED FOR THE TEMPORARY TRAFFIC CONTROL ACTIVITIES FOR A

VARIETY OF SITUATIONS COMMONLY ENCOUNTERED. IT IS REQUIRED FROM THE ENGINEER TO

ADJUST THESE GUIDELINES TO FIELD CONDITIONS.

SPECIFIC SITUATIONS NOT COVERED BY THESE APPLICATIONS SHALL BE BROUGHT UP TO THE

ENGINEER FOR APPROPIATE DIRECTION AND CLARIFICATION 10 DAYS BEFORE THE BEGINNING OF

THE CONSTRUCTION WORK IN THAT AREA.

CONSTRUCTION:

1. IMPLEMENT THE WORK ZONE TEMPORARY TRAFFIC CONTROL IN ACCORDANCE WITH THE

MAINTENANCE OF TRAFFIC INDICATED ON THE PLANS (MOT-2 TO MOT-5).

2. INSTALL PCMS TO COMPLEMENT SIGNING AS REQUIRED BY EACH ACTIVITY TYPE.

3. THE DETAILS SHOWN SHALL BE USED IN BOTH DIRECTIONS.

TRAFFIC:

1. THE TRAFFIC WILL BE FLOWING AS INDICATED ON THE MAINTENANCE OF TRAFFIC USED FOR THE

CONSTRUCTION AREA.

2. ALL WORK TO BE PERFORMED SHALL BE COORDINATED WITH THE TRAFFIC ENGINEERING OFFICE

PERSONNEL.

3. NO WORK SHALL BE ALLOWED DURING PEAK HOURS. THE PEAK HOURS ARE DEFINED AS 6:00 AM -

9:00 AM AND 3:00 PM - 6:00 PM FROM MONDAY TO FRIDAY.

4. ALL ACTIVITIES PROPOSED FOR THE PROJECT THAT AFFECT THE NORMAL FLOW OF TAFFIC, SHALL

BE COORDINATED WITH ALL PROJECTS THAT ARE WITHIN A COVERAGE RADIUS OF TWO MILES OF

THE WAY THAT THEY DO NOT AFFECT EACH OTHER.

5. THE CONTRACTOR SHALL COORDINATE WITH THE ENGINEER THE ACCESS POINTS FOR

CONSTRUCTION VEHICLES. INSTALL SIGN W8-6 (TRUCK CROSSING - 36" X 36") TO ALERT ROAD USERS

OF LOCATIONS WHERE UNEXPECTED TRAVEL BY CONSTRUCTION VEHICLES MIGHT OCCUR.

23. THE ESTIMATE WORKING DAYS IN THE M.O.T.ARB:

PR-155 KM. 36.15 = 4 MO (122 DAYS)

24. OVERNIGHT LANE CLOSURE HOURS SHALL BE FROM 6:30PM. TO 6:30AM., IN CASE OF ONE LANE / TWO -

WAY TRAFFIC TWO RED / YELLOW LENS AUTOMATED FLAGGER ASSISTANCE DEVICE (AFAD) WILL BE INSTALLED.

25. THE CONTRACTOR SHALL PAINT THE PERMANENT ROAD LINES EQUAL TO EXISTING WHEN FINISHES THE

WORKS AT ALL SITES.

TYPE OF TAPER

MERGING TAPER

AT LAST L

SHIFTING TAPER

TAPER LENGHT

SHOULDER TAPER

TRAFFIC TAPER

ONE-LANE,TWO WAY

DOWNSTREAM TAPER

AT LAST 0.5L

AT LAST 0.33L

50 FEET MINIMUM, 100 MAXIMUM

50 FEET MINIMUM, 100 MAXIMUM

(TABLE 6C-3, MUTCD 2009)

SPEED(S)

40 MPH OR LESS

L=

45 MPH OR MORE

MUTCD TABLE 6C-4

FORMULA FOR DETERMINING

TAPER LENGTH

TAPER LENGHT(L) (FEET)

WS

L= WS

WHERE: L= TAPER LENGHT IN FEET

W= WIDTH OF OFFSET IN FEET

S= POSTED SPEED LIMIT, OR OFF-PEAK

85TH-PERCENTILE SPEED PRIOR TO

WORK STARTING, OR THE ANTICIPATED

OPERATING SPEED IN MPH.

(TABLE 6C-4, MUTCD 2009)

URBAN (HS)

AUTOMATED FLAGGER ASSISTANCE

DEVICE (AFAD)

(SEE GENERAL NOTE NO-26 ON THIS DWG)

26. FLAG PERSONS WILL NOT BE MEASURED FOR DIRECT PAYMENT BUT SHALL BE SUBSIDIARY OBLIGATION

OF THE CONTRACTOR COVERED UNDER OTHER CONTRACT ITEMS (SPEC. 638-4.01 (L).

N ot e:

T he M

O T is p ai d fo r a t c on tra ct lu m p su m p ric e, w hi ch is d es cr ib ed in th e

SC

R

, M O

T pl an s, a nd a ll th e ne ce ss ar y ite m s to fu lfi ll th e

M O

T.

T he c on tra ct or s ha ll co ns id er a ny ad di tio na l i te m s or q ua nt iti es th at m ay b e ne ed ed to e st ab lis h th e M

O T in th ei r p ric e pr op os al

SHOULDER

WORK

AREA

SHOULDER

TRUCK-MOUNTED-ATTENUATOR

FLASHING ARROW

(CAUTION MODE)

OUTSIDE SHOULDER CLOSURE

TEMPORARY AND PERMANENT TRAFFIC SIGNS INSTALLATION

SHORT-DURATION OR MOBILE OPERATION

NOTE:

- FOR EACH TYPICAL APPLICATION, THE DISTANCE BETWEEN SIGNS,

TAPER AND BUFFER LONGITUDINAL LENGTH SEE THE TABLE

ON SHEET MOT/1.

- THE WORK AREA LONGITUDINAL LENGTH IT WILL DEPEND OF

THE PROJECT ENGINEER APPROVAL BUT IT SHALL NOT EXCEED

60 MTS.

THIS SCHEME MAY BE USED AS MIRROR IMAGE

TYPICAL APPLICATION DIAGRAM TWO LANE RURAL ROAD I

TYPICAL APPLICATION DIAGRAM II

N.T.S.

N.T.S.

TYPICAL APPLICATION DIAGRAM "PASEO" III

THIS SCHEME MAY BE USED AS MIRROR IMAGE

THIS SCHEME MAY BE USED AS MIRROR IMAGE AND NO FOR PAVING OPERATIONS (WITH DRUMS)

TYPICAL APPLICATION DIAGRAM TWO LANE RURAL ROAD V

TYPICAL APPLICATION DIAGRAM TWO LANE RURAL ROAD IV

N.T.S.

TYPICAL APPLICATION DIAGRAM TWO LANE RURAL ROAD VI

TYPICAL APPLICATION DIAGRAM TWO LANE RURAL ROAD VII

TYPICAL APPLICATION DIAGRAM TWO LANE RURAL ROAD VIII

STRUCTURE

OVERHEAD

SIGN

SIZE OF

TYPEPANELS

SIGNLOCATIONCODE

NUMBER NUMBER

CODE

L E G E N D

TOTALREFERENCE

MANUAL ITEM

OFFSET REQUIREMENTS

ROUTE

URBAN ROADS

FROM

ALL PROJECT

TO

.60 mts.

OFFSET

ALL PROJECT

W20-1 36" X 36" N/A

N/AG20-2A 48"X36"

OTHER ROADS ALL PROJECT

.60 mts.

ALL PROJECT

13,20,21,28 2

16,17,24,25 2

STRUCTURE

OVERHEAD

SIGN

SIZE OF

TYPEPANELS

SIGNLOCATIONCODE

NUMBER NUMBER

CODE

L E G E N D

TOTALREFERENCE

MANUAL ITEM

N/A

15,18,23,26

W20-7(A) 36"X36"

16 14,19,22,27

W20-4 36" X 36" N/A

N/AW13-1 12"X24"

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

MANUAL

SEE

D.T.P.W.

AND

M.U.T.C.D.

MANUAL

SEE

D.T.P.W.

AND

M.U.T.C.D.

MANUAL

SEE

D.T.P.W.

AND

M.U.T.C.D.

MANUAL

SEE

D.T.P.W.

AND

M.U.T.C.D.

W13-1

12" X 24"

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

THIS

SIGN

WAS

OMIT

0 8 m4 m

4. ON ANY GIVEN LEVEL BASKETS WITH EXPOSED

FACES MUST BE FILLED PRIOR TO FILLING

BASKETS WITH NO EXPOSED FACE.

5. BASE OF GABION MUST BE CONSTRUCTED BELOW

SCOUR DEPTH NEXT TO STREAMS.

6. EXTERIOR GABIONS SHALL CONSIST OF WIRE MESH

BASKETS FILLED BAY HAND PLACEMENT OF COARSE

AGGREGATE, AT LEAST ALONG THE EXPOSED FACES,

FOR A UNIFORM APPEARANCE.

7. INTERIOR GABIONS SHALL CONSIST OF WIRE-MESH

BASKETS FILLED BY HAND PLACEMENT OR SMALL

POWER EQUIPMENT PLACEMENT OF COARSE AGGREGATE.

1. CROSS TIES MAY BE FABRICATED IN THE FIELD USING

WIRE (0.087 IN).

2. DO NOT MIX STRAIGHT AND CROSSED CROSS TIES IN

THE SAME GABION INSTALLATION.

3. FOR 3 FT (0.914 M) GABIONS, CROSS TIES SHALL BE

ATTACHED AT 1/3 AND 2/3 OF THE GABION HEIGHT

AS THE CELL IS BEING FILLED.

4. FOR 1.5 FT (0.457 M) AND 1.0 FT (0.305 M) GABIONS,

CROSS TIES SHALL BE INSTALLED AT THE HALF HEIGHT

LEVEL.

5. CROSS TIES SHALL BE INSTALLED IN BOTH DIRECTIONS

(LONGITUDINAL AND FRONT TO BACK) IN EXTERNAL GABIONS.

USE LONGITUDINAL CROSS TIES IN INTERNAL GABIONS.

1. USE NON-INTERLOCKING FASTENERS FOR ASSEMBLY

OF GABION BASKETS.

2. USE ONE FASTENER PER WIRE MESH OPENING EXEPT USE

TWO PER WIRE MESH OPENING ON EXPOSED ENDS OF

GABION BASKETS AT BEGINING OR END OF ROW.

3. EDGES OF GABION BASKETS SHALL BE JOINED USING THE

APPROPRIATE LACING TECHNIQUES.

MANUAL: CONTINUOUS WIRE LOOPED TIGHTLY AROUND

EVERY OTHER MESH OPENING, ALTERNATING SINGLE AND

DOUBLE LOOPS.

MECHANICAL: USING A PNEUMATIC OR HAND TOOL, EMPLOYING

STAINLESS STEEL "C" SHAPED FASTENERS. FOR CONTINUITY AND

STRENGTH, THE RECOMENDED SPACING IS 4 IN. THE MAXIMUM

SPACING SHALL BE 6 IN.

1 2 3 4

1 2 3 4

² ²

1. ALL TWISTED WIRE GABIONS SHALL COMPLY

WITH ASTM A975-97

2. ALL GABIONS MUST BE PVC-COATED AS SPECIFIED

FOR STYLE 3 IN THE ASTM A975

3. ALL GABIONS SHALL CONSIST OF DOUBLE-TWISTED

WIRE MESH MADE FROM WIRE WHICH IS ZINC-COATED

BEFORE BEING DOUBLE-TWISTED INTO MESH.

FASTENERS, LACING WIRE, AND STIFFENERS ARE

PRODUCED FROM ZINC-COATED WIRE.

4. OVERLAPING STAINLESS STEEL FASTENERS MAY BE

USED IN LIEU OF LACING WIRE FOR BASKET ASSEMBLY

AND INSTALLATION.

5. FOR GABION BASKETS REFERE TO PRHTA STANDARD

DRAWING (GABI-01 TO GABI-10) AND STANDARD SPECS.

614-GABIONS.

2. ROCKS SHALL BE HARD, ANGULAR TO ROUND, DURABLE AND OF SUCH QUALITY THA THEY

SHALL NOT DISINTEGRATE ON EXPOSURE TO WATER OR WEATHERING DURING THE LIFE OF THE

STRUCTURE.

4. THE GABION INSTALLATION AND SPECIFICATION SHALL COMPLY WITH MANUFACTURER

REQUIREMENTS AND STANDARD SPECIFICATION 615.

3. BULGES OR DEPRESSIONS OF THE GABION BASKETS SHALL NOT EXCEED 2 INCHES (0.051 M) WHEN

MEASURED WITH A 3 FOOT (0.914 M) STRAIGHT EDGE. DEVIATIONS SHALL BE CORRECTED AT THE

CONTRACTOR'S EXPENSE.

2. GABION BASKETS MAY BE SUPPLIED AS ASSEMBLED, UN-ASSEMBLED OR ROLL STOCK.

1. STAGGER THE VERTICAL JOINTS BETWEEN THE BASKETS OF ADJACENT ROWS AND LAYERS BY ONE

HALF CELL LENGHT.

3. GABION BASKETS 12 INCHES (0.305 M) OR GREATER IN THE VERTICAL DIMENSION SHALL BE

FILLED WITH ROCKS GRADED FROM LARGE TO SMALL WITH 100% PASSING AN 8-INCH SIEVE

AND 100% RETAINED ON A 4-INCH SIEVE. ROCKS SHALL HAVE A MAXIMUM DIMENSION OF 8

INCHES (0.204 M) AND A MINIMUM OF 4 INCHES (0.102 M).

5. CARE SHALL BE TAKEN WHEN PLACING THE STONE TO ASSURE THAT THE PVC COATING OF

GABIONS WILL NOT BE DAMAGED. ROCKS SHOULD NOT BE MACHINE PLACED FROM HEIGHTS

GREATER THAN 2 FEET (0.610 M) ABOVE BASKET.

6. GABION PLACEMENT SHALL BE FRONT TO FRONT AND BACK TO BACK, SO THAT PAIRS OF

FACING LIDS CAN BE WIRE DOWN IN ONE PROCESS.

7. TO ALLOW FOR SETTLEMENT, LEVEL OFF THE ROCK FILL 1 INCH (0.025 M) TO 1.5 INCHES

(0.038 M) ABOVE THE TOP OF THE MESH.

4. THE ROCKS SHALL HAVE A PERCENT OF WEAR NOT MORE THAN 45 WHEN TESTED BY AASHTO T96.

1. ROCKS FOR GABIONS MAY BE PRODUCED BY ANY SUITABLE QUARRYING METHOD, AND BY THE

USE OF ANY DEVICE THAT YIELDS THE REQUIRED SIZES WITHIN THE GRADATION LIMITS

SPECIFIED.

3. DURING THE FILLING OPERATION SOME MANUAL STONE PLACEMENT IS REQUIERED TO MINIMIZE

VOIDS AND GIVE THE EXPOSED FACES OF VERTICAL STRUCTURES A NEAT, FLAT, AND COMPACT

APPEARANCE. THE CELLS SHALL BE FILLED IN STAGES SO THAT LOCAL DEFORMATION MAY BE

AVOIDED. AT NO TIME SHALL ANY CELL BE FILLED TO A DEPTH EXCEEDING 1 FOOT (0.305 M)

HIGHER THAN THE ADJOINING CELL.

2. GABIONS SHALL BE CONNECTED TOGETHER AND ALIGNED BEFORE FILLING THE BASKET WITH

ROCKS. ALL CONNNECTIONS (PANEL TO PANEL AND BASKET TO BASKET) SHALL BE ALREDY

CARRIED OUT AS DESCRIBED IN THE ASSEMBLY OPERATIONS.

1. GABIONS SHALL BE SET TO THE LINE AND GRADE SPECIFIED IN THE CONSTRUCTION DRAWINGS.

2. THE PROCEDURE FOR USING LACING WIRE CONSIST OF CUTTING A SUFFICIENT LENGHT OF WIRE

AND FIRST LOOPING AND/OR TWISTING THE LACING WIRE TO THE WIRE MESH. PROCEED TO

LACE WITH ALTERNATING DOUBLE AND SINGLE LOOPS THROUGTH EVERY MESH OPENING

APROXIMATELY EVERY 6 INCHES (0.152 M) PULLING EACH LOOP TIGHT AND FINALLY SECURING

THE END OF THE LACING WIRE TO THE WIRE MESH BY LOOPING AND/OR TWISTING.

1. THE TOP CORNER OF THE END PANELS AND CENTER DIAPHRAGMS HAVE AN EXTENDED SELVEDGE

WIRE EXTENDIGN APPROX. 4 INCHES (0.102 M) OUT FROM THE CORNER EDGE. RISE THE END

PANELS AND THE DIAPHRAGMS TO VERTICAL POSITION AND WRAP THE SELVEDGE WIRE AROUND

THE EDGE WIRE OF THE TOP AND BACK PANELS.

4. CLOSE THE BASKETS AFTER ROCK FILLING BY FOLDING THE LID DOWN, PULLING THE EDGES OF

THE PANELS TO BE CONNECTED WHERE NECESSARY USING USING APPROPIATE TOOL. THE LIDS

SHALL BE TIGHTLY LACED ALONG ALL EDGES, ENDS AND DIAPHRAGMS IN THE SAME MANNER AS

DESCRIBED FOR ASSEMBLY. ADJACENT LIDS MAY BE SECURELY ATTACHED SIMULTANEOUSLY.

ALL END WIRES SHALL THEN BE TURNED IN.

3. INTERNAL CONNECTING WIRE STIFFENERS SHALL BE ATTACHED AT 1/3 AND 2/3 OF THE HEIGHT

OF 3 FEET (0.914 M) GABION UNITS AS THE CELL IS BEING FILLED. IN 1.5 FEET (0.457 M)HIGH UNITS

STIFFENERS MAY BE FIXED AT THE HALF HEIGHT LEVEL.

4. THE GEOTEXTILE USED SHALL COMPLY WITH STANDARD SPECIFICATION 712-7.

3. GEOTEXTILE FOR GABION GRAVITY RETAINING WALLS SHALL CONFORM WITH AASHTO M288,

CLASS-2, WITH ELONGATION GRATER OR EQUAL TO 50% AND SUBSURFACE DRAINAGE

REQUIREMENTS FOR IN SITU SOIL PASSING THE #200 SIEVE BETWEEN 15% AND 50%.

2. THE GEOTEXTILE SHALL RUN THE ENTIRE HEIGHT OF THE GABION WALL.

1. GEOTEXTILE FILTER SHALL BE PLACED BETWEEN THE GABION AND THE BORROW BACKFILL.

GEOTEXTILE FILTER

SEE SPECIFICATION 712-7

BACKFILL MATERIAL

A-2-4 OR BETTER

TEMPORARY

CUT

Phase 1

Phase 3

Phase 2

Refer to Technical Spec. 605 & 712

Refer to Technical Spec. 605 & 712

2 1

8 6

LEGEND:

EXISTING

TREE INVENTORY