HomeMy WebLinkAboutP_Franchise Permit Application 12RS 2019-001P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_1-8.dwg TAB:COVER Date Exported: 06/03/20 - 10:42 by syiOLYMPIC PIPE LINE COMPANY LLC
LIN' A9E 6:
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12RS UTWM DIG SITE 2019-01
12" PRODUCTS PIPELINE
RENTON STATION TO SEATTLE TERMINAL
12RS UTWM DIG SITE 2019-0112" PRODUCTS PIPELINERENTON STATION TO SEATTLE TERMINALOL<MPIC PIPE LINE COMPAN< LLC
O))ICE P+ONE 2 91-22
PRO-ECT MANAGER TIM DUNN
ISSUED )OR PERMIT ISSUED )OR PERMITPRO-ECT NO 09-12-OL<MPIC PIPE LINE COMPAN< LLC 2 91-22O))ICE P+ONE 2 1-012
PRO-ECT CONTACT CARLA WOODWORT+
R
EN
T
ON
A
V
EN
U
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S
O
U
TH
S. 132ND STREET
84TH AVENUE S.2144800776 2144800776
2144800777
2144800775
1823059055
1823059199
2144800485
2144800774
2144800720
2144800520
2144800487
2144800500
2144800488
2144800523
2144800522
S 134
T
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S
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T
1823059050
1823059050
1823059054
S. 132ND STREET SENECA AVENUE NW84TH AVENUE S.OLYMPIC PIPE LINE COMPANY LLC
A
A
P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_2-8.dwg TAB:S02 Date Exported: 05/19/20 - 10:28 by syiVICINITY MAP
W E
N
S
PARCEL MAP
0
SCALE IN FEET
1,000 2,000 0
SCALE IN FEET
300 600
APPLICANT / PROJECT DEVELOPER:
OLYMPIC PIPE LINE COMPANY LLC
600 SW 39TH ST, SUITE 275
RENTON, WA 98057
REFERENCE DOCUMENTS:
DATA SOURCE:
MAPBOX OPEN STREET MAP, 2016.
PROJECTION: NAD83 WASHINGTON STATE PLANES, NORTH ZONE, US FOOT.
DWG TITLEDWG#
SHEET INDEX:
COVER SHEET12RS UTWM Dig Sites 2019-01-A_1-8
VICINITY MAP AND PROJECT INFORMATION12RS UTWM Dig Sites 2019-01-A_2-8
SITE PLAN, ACCESS AND TESC/SPCC NOTES
12RS UTWM Dig Sites 2019-01-A_4-8
12RS UTWM Dig Sites 2019-01-A_3-8
TESC, GRADING PLAN AND TESC DETAILS
W E
N
S
PROJECT SITE
12RS UTWM DIG SITE
2019-01
SITE OWNER:LOCATION:
CITY OF RENTON RENTON AVE SOUTH,
EAST OF S. 132ND STREET
RENTON, WA 98178
OLYMPIC PIPE LINE COMPANY LLC
TIM DUNN
600 SW 39TH ST, SUITE 275
RENTON, WA 98057
OFFICE PHONE: (425) 981-2542
CELL PHONE: (206) 419-5497
EMAIL: TIM.DUNN@BP.COM
SECTION - TOWNSHIP - RANGE:
NE13 - T23N - R04E - WM
NW18 - T23N - R05E - WM
CROSS SECTIONS A-A' AND B-B'
12RS UTWM Dig Sites 2019-01-A_6-8
12RS UTWM Dig Sites 2019-01-A_5-8
SITE RESTORATION PLAN
OLYMPIC PROJECT
DEVELOPER CONTACT:
CITY OF RENTON, 2020, GIS DATA SHAPEFILES PARCEL
BOUNDARIES, UNDERGROUND UTILITIES AND TOPO
CONTOURS.
GEOENGINEERS, INC. 2020, EXCAVATIONS AND FENCES
CREATED FROM SKETCH ON AERIAL FROM BING AERIAL
AND FROM SITE VISIT ON MAY 1, 2020.
PROJECT MANAGER AND CESCL CONTACT INFORMATION:
CONTRACTOR CONTACT INFORMATION:
HANGING H COMPANIES
SUPERINTENDENT DAVID WALKER
1912 S. BURLINGTON BLVD., SUITE 100
BURLINGTON, WA 98233
CELL PHONE: (360) 661-3535
GEOENGINEERS, INC.
CARLA WOODWORTH
17425 NE UNION HILL ROAD, SUITE 250
REDMOND, WA 98052
OFFICE PHONE: (425) 861-6012
CELL PHONE: (425) 466-6772
12RS UTWM Dig Sites 2019-01-A_7-8 TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS
12RS UTWM Dig Sites 2019-01-A_8-8 TRENCH RESTORATION AND STREET OVERLAY REQUIREMENTS
OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12O
P
L
1
2OP
L
1
2OP
L
1
2OP
L
1
2
3003
5
0
25
0
3
0
0 35035020020
0
2
5
0
25
0
250 2502
0
0
200
250
250
R
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A
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S. 132ND STREET
84TH AVENUE S.PARCEL
#2144800776
(R-10)
PARCEL
#2144800776
(R-10)
PARCEL
#2144800777
(R-14)
PARCEL
#2144800775
(R-14)
PARCEL
#1823059055
(R-14)
PARCEL
#1823059199
(R-8)
PARCEL
#2144800485
(R-14)
PARCEL
#2144800774
(R-10)
PARCEL
#2144800720
(R-10)
PARCEL
#2144800520
(R-14)
PARCEL
#2144800487
(R-14)
PARCEL
#2144800500
(R-14)
PARCEL
#2144800488
(R-14)
PARCEL
#2144800523
(R-14)
PARCEL
#2144800522
(R-14)
S 134T
H
S
T
R
E
E
T
8' (W) x 35' (L) x 4' (D) EXCAVATION
APPROXIMATE LOCATION OF ANOMALY
8' (W) x 35' (L) x 15.5' (D) EXCAVATION
12RS UTWM DIG SITE 2019-01
PARCEL
#1823059050
(R-8)
PARCEL
#1823059050
(R-8)
PARCEL
#1823059054
(R-8)
S. 132ND STREET SENECA AVENUE NW84TH AVENUE S.PARCEL
#2144800778
(R-10)
OLYMPIC PIPE LINE COMPANY LLC
A
A
P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_3-8.dwg TAB:S03 Date Exported: 05/19/20 - 10:34 by syiDATA SOURCE:
DATA FROM CITY OF RENTON GIS DATA AND AERIAL PHOTO FROM BING AERIAL.
PROJECTION: NAD83 WASHINGTON STATE PLANES, NORTH ZONE, US FOOT.
W E
N
S
LEGEND
SEWER LINE
WATER LINE
STORM DRAIN LINE
INACTIVE PIPE
SITE ACCESS
PARCEL BOUNDARY
OLYMPIC PIPELINE (12")
10-FOOT CONTOUR
50-FOOT CONTOUR
ZONING NUMBER
OPL12
SCALE:
SITE PLAN AND ACCESS
1" = 100'0
SCALE IN FEET
100 200
TEMPORARY EROSION AND SEDIMENT CONTROL (TESC) NOTES
1.THESE TEMPORARY EROSION AND SEDIMENT CONTROL NOTES ARE FROM THE 2016 KING COUNTY SURFACE WATER DESIGN MANUAL, APPENDIX D (2016).
2.APPROVAL OF THIS EROSION AND SEDIMENTATION CONTROL (TESC) PLAN DOES NOT CONSTITUTE AN APPROVAL OF PERMANENT ROAD OR DRAINAGE DESIGN (E.G. SIZE AND LOCATION OF
ROADS, PIPES, RESTRICTORS, CHANNELS, RETENTION FACILITIES, UTILITIES, ETC.).
3.THE IMPLEMENTATION OF THESE TESC PLANS AND THE CONSTRUCTION, MAINTENANCE, REPLACEMENT, AND UPGRADING OF THESE TESC FACILITIES IS THE RESPONSIBILITY OF THE
APPLICANT/TESC SUPERVISOR UNTIL ALL CONSTRUCTION IS APPROVED.
4.THE TESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN CONJUNCTION WITH ALL CLEARING AND GRADING SO AS TO ENSURE THAT THE TRANSPORT OF
SEDIMENT TO SURFACE WATERS, DRAINAGE SYSTEMS, AND ADJACENT PROPERTIES IS MINIMIZED.
5.THE TESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE TESC FACILITIES SHALL
BE UPGRADED AS NEEDED FOR UNEXPECTED STORM EVENTS AND MODIFIED TO ACCOUNT FOR CHANGING SITE CONDITIONS (E.G. ADDITIONAL COVER MEASURES, ADDITIONAL SUMP
PUMPS, AND SILT FENCES, PERIMETER PROTECTION ETC.) AS DIRECTED BY OLYMPIC/BP USPL.
6.THE CONTRACTOR SHALL MAINTAIN ALL PUBLIC ROADWAYS WITH STREET SWEEPING AS NECESSARY TO REMOVE SEDIMENT.
7.THE TESC FACILITIES SHALL BE INSPECTED DAILY BY THE APPLICANT/TESC SUPERVISOR AND MAINTAINED TO ENSURE CONTINUED PROPER FUNCTIONING.
8.ANY AREAS OF EXPOSED SOILS, INCLUDING ROADWAY EMBANKMENTS, THAT WILL NOT BE DISTURBED FOR TWO CONSECUTIVE DAYS DURING THE WET SEASON OR SEVEN DAYS DURING THE
DRY SEASON SHALL BE IMMEDIATELY STABILIZED WITH THE APPROVED TESC METHODS (E.G. SEEDING, MULCHING, PLASTIC COVERING, ETC.).
9.MATERIAL THAT MAY BE TEMPORARILY STORED FOR USE IN PROJECT ACTIVITIES SHALL BE COVERED WITH PLASTIC OR OTHER IMPERVIOUS MATERIAL AND PROTECTED BY APPROPRIATE BMPS
TO PREVENT SEDIMENTS FROM BEING WASHED FROM THE STORAGE AREA TO SURFACE WATERS. (BA-6, BA-27).
10.AT NO TIME SHALL MORE THAN ONE (1) FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED PRIOR TO
PAVING. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT-LADEN WATER INTO THE DOWNSTREAM SYSTEM.
SPILL PREVENTION, COUNTERMEASURES AND CONTROL (SPCC) NOTES
THE CONTRACTOR SHALL PREPARE A SPCC PLAN PRIOR TO BEGINNING CONSTRUCTION. THE SPCC PLAN SHALL IDENTIFY THE APPROPRIATE SPILL CONTAINMENT MATERIALS, WHICH WILL BE
AVAILABLE AT THE PROJECT SITE AT ALL TIMES, DETAIL THE PROCEDURES THAT WILL BE FOLLOWED IN THE EVENT OF A SPILL TO PREVENT OR MINIMIZE EFFECTS, AND WILL SPECIFICALLY
ADDRESS POTENTIAL FUEL SPILLS FROM VEHICLES AND POTENTIAL SPILLS OF CHEMICALS THAT ARE COMMONLY USED DURING CONSTRUCTION.
1.THE CONTRACTOR SHALL ENSURE THAT FUEL AND CHEMICAL STORAGE IS STORED WITHIN SECONDARY CONTAINMENT AREAS. THE SECONDARY CONTAINMENT SHALL BE SURFACED WITH AN
IMPERMEABLE MATERIAL AND SIZED TO CONTAIN THE VOLUME OF STORED FUEL AND/OR CHEMICALS. TO PROTECT FROM RAIN AND SNOW, IT IS RECOMMENDED THAT CONTAINERS AND
THE SECONDARY CONTAINMENT BE INSIDE A BUILDING OR UNDER SOME TYPE OF PROTECTIVE COVERING. THE COVER MUST ALLOW FOR ADEQUATE INSPECTION. COVERED SECONDARY
CONTAINMENT MUST BE LARGE ENOUGH TO CONTAIN TEN PERCENT OF THE FREE LIQUID IN ALL CONTAINERS OR 100 PERCENT OF THE FREE LIQUID IN THE LARGEST CONTAINER. UNCOVERED
SECONDARY CONTAINMENT MUST HAVE CAPACITY TO HOLD THE ADDITIONAL PRECIPITATION RESULTING FROM A MAXIMUM 25-YEAR STORM LASTING 24 HOURS. THAT IS, THE CONTAINMENT
SYSTEM MUST HOLD THE VOLUME OF WATER RESULTING FROM A 24-HOUR RAINFALL WITH AN AVERAGE RAINFALL INTENSITY (IN INCHES/HOUR) OF A STORM THAT SHOULD OCCUR ONLY
ONCE IN EVERY 25 YEARS.
2.SPILL RESPONSE EQUIPMENT WILL BE LOCATED WITHIN THE CONSTRUCTION ZONES TO MINIMIZE COUNTERMEASURE RESPONSE TIMES.
3.THERE WILL BE NO VISIBLE SHEEN FROM PETROLEUM PRODUCTS AS A RESULT OF PROJECT ACTIVITIES.
4.FUEL HOSES, OIL DRUMS, OIL OR FUEL TRANSFER VALVES AND FITTINGS, ETC., SHALL BE CHECKED REGULARLY FOR DRIPS OR LEAKS, AND SHALL BE MAINTAINED AND STORED PROPERLY
TO PREVENT SPILLS.
5.ALL CONSTRUCTION DEBRIS AND OTHER SOLID WASTE MATERIAL SHALL BE PROPERLY MANAGED AND DISPOSED OF IN AN DISPOSAL SITE APPROVED BY THE APPROPRIATE REGULATORY
AUTHORITY.
TESC CONSTRUCTION SEQUENCE NOTES
(PROJECTED PROJECT DURATION JULY 27TH - AUGUST 5TH, 2020)
1.HOLD THE PRE-CONSTRUCTION MEETING.
2.INSTALL CATCH BASIN PROTECTION, IF REQUIRED.
3.INSTALL PERIMETER PROTECTION (STRAW WATTLE) AS NEEDED.
4.MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH KING COUNTY SURFACE WATER DESIGN MANUAL (2016) STANDARDS AND MANUFACTURER'S RECOMMENDATIONS.
5.RELOCATE EROSION CONTROL MEASURES, OR INSTALL NEW MEASURES AS NEEDED.
6.COVER ALL AREAS THAT WILL BE UNWORKED FOR MORE THAN SEVEN DAYS DURING THE DRY SEASON OR TWO DAYS DURING THE WET SEASON WITH STRAW, WOOD FIBER MULCH,
COMPOST, PLASTIC SHEETING, OR EQUIVALENT.
7.PR0VIDE TEMPORARY STABILIZATION OF ALL AREAS, WITHIN SEVEN DAYS OF COMPLETING CONSTRUCTION ACTIVITIES.
8.UPON COMPLETION OF THE PROJECT, STABILIZE ALL DISTURBED AREAS AND REMOVE BMPS.
9.ALL CONSTRUCTION DEBRIS, EXCESS SEDIMENT AND OTHER SOLID WASTE MATERIAL SHALL BE PROPERLY MANAGED AND DISPOSED OF IN DISPOSAL SITE APPROVED BY THE APPROPRIATE
REGULATORY AUTHORITY.
RESTORATION
RESTORATION IS TO BE COMPLETED AS SHOWN ON DRAWINGS 6, 7 AND 8.
(R-14)
3'-4'
ADJACENT ROLLS
SHALL TIGHTLY ABUT
STRAW ROLLS MUST BE
PLACED ALONG SLOPE
CONTOURS
STRAW WATTLE
(MID 9998192)
SCALE:
1STRAW WATTLE DETAIL
NOT TO SCALE
(ECOLOGY BMP C235)
ROLL SPACING DEPENDS ON SOIL
TYPE AND SLOPE STEEPNESS
10'-25'
(3-8m)
3"-5" (75-125mm)
SEDIMENT, ORGANIC MATTER,
AND NATIVE SEEDS ARE
CAPTURED BEHIND THE
ROLLS
1" x 1" STAKE
8"-10" DIA.
(200-250mm)
NOTES:
1.STRAW ROLL INSTALLATION REQUIRES THE PLACEMENT AND SECURE STAKING OF THE ROLL IN A
TRENCH, 3" x 5" (75-125mm) DEEP, DUG ON CONTOUR.
2.RUNOFF MUST NOT BE ALLOWED TO RUN UNDER OR AROUND ROLL.
LIVE STAKE
OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL122452
4
5
2
5
0
2
5
5
220
2252
3
0
2
3
5
2352
2
5 2302352
4
0 240
R
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S. 132ND STREET
84TH AVENUE S.PARCEL
#2144800777
PARCEL
#2144800520
B'B
A'A70'
8'
C'C
8' (W) x 35' (L) x 15.5' (D) EXCAVATION
8' (W) x 35' (L) x 4' (D) EXCAVATION
APPROXIMATE LOCATION OF ANOMALY
APPROXIMATE END OF CASING
(DEPTH OF COVER 12.5 FT.)
35'
35'
SCALE:
2
INLET PROTECTION WITH SECTIONS
NOT TO SCALE
GRATE FRAME
SEDIMENT
AND
DEBRIS
DRAINAGE GRATE
5" MAX
TRIM
OVERFLOW BYPASS
BELOW INLET
GRATE DEVICE
FILTERED
WATER
DRAINAGE GRATE
~RECTANGULAR GRATE SHOWN
BELOW INLET GRATE DEVICE
OVERFLOW
BYPASS (TYP)
NOTES:
1.SIZE THE "BELOW INLET GRATE DEVICE" (BIGD) FOR THE STORM WATER STRUCTURE IT WILL SERVICE
2.THE BIGD SHALL HAVE A BUILT-IN HIGH-FLOW RELIEF SYSTEM (OVERFLOW BYPASS).
3.THE RETRIEVAL SYSTEM MUST ALLOW REMOVAL OF THE BIGD WITHOUT SPILLING HTE COLLECTED MATERIAL.
4.PERFORM MAINTENANCE IN ACCORDANCE WITH STANDARD SPECIFICATION 8-01.3(15).
RETRIEVAL
SYSTEM (TYP)
(ECOLOGY BMP C220)
OLYMPIC PIPE LINE COMPANY LLC
A
A
P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_4-8.dwg TAB:S04 Date Exported: 05/19/20 - 10:38 by syiSCALE:
DETAILED SITE PLAN
1" = 10'
0
SCALE IN FEET
10 20
DATA SOURCE:
DATA FROM CITY OF RENTON GIS DATA AND AERIAL PHOTO FROM BING AERIAL.
PROJECTION: NAD83 WASHINGTON STATE PLANES, NORTH ZONE, US FOOT.
W E
N
S
LEGEND
STRAW WATTLE (BMP C235)
CATCH BASIN INSERT (BMP C220)
STORM DRAIN LINE
WATER LINE
INACTIVE PIPE
PARCEL BOUNDARY
OLYMPIC PIPELINE (12")
1-FOOT CONTOUR
5-FOOT CONTOUR
OPL12
NOTE:
1.A VACUUM TRUCK WILL BE USED TO COMPLETE EXCAVATION ACTIVITIES. SOILS REMOVED
FROM EXCAVATION WILL BE TRANSPORTED OFFSITE TO AN AUTHORIZED DISPOSAL FACILITY.
Elevation (Feet)Elevation (Feet)Distance (Feet)
224
228
232
236
240
244
224
228
232
236
240
244
0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 90
Elevation (Feet)Elevation (Feet)Distance (Feet)
224
228
232
236
240
244
224
228
232
236
240
244
0 4 8 12 16 20
A
(North)
A'
(South)
B
(West)
B'
(East)
EXISTING GRADE SURFACE/ASPHALT PAVING
8' (W) x 35' (L) x 4' (D) EXCAVATION
(AT GROUND SURFACE)
EXISTING 12-INCH
OLYMPIC PIPELINE
EXISTING GRADE SURFACE
15.5'
11.5'
4.0'
35.0'35.0'
8' (W) x 35' (L) x 15.5' (D) EXCAVATION
(AT GROUND SURFACE)
APPROXIMATE END OF CASING
(DEPTH OF COVER 12.5 FT.)
APPROXIMATE LOCATION OF ANOMALY
Elevation (Feet)Elevation (Feet)Distance (Feet)
224
228
232
236
240
244
224
228
232
236
240
244
0 4 8 12 16 20
C
(West)
C'
(East)
INSTALL VENT AND TEST WIRES
SOUTH OF SIDEWALK
EXISTING 12-INCH
OLYMPIC PIPELINE EXISTING 12-INCH
OLYMPIC PIPELINE
8' (W) x 35' (L) x 15.5' (D) EXCAVATION
(AT GROUND SURFACE)
8' (W) x 35' (L) x 4' (D) EXCAVATION
(AT GROUND SURFACE)
INSTALL VENT AND TEST WIRES
EXISTING GRADE SURFACE
INSTALL VENT AND TEST WIRES
5 FT WIDE
SIDEWALK
EDGE OF ROADWAY
SIDEWALK CURB
EXISTING GROUND
SURFACE - GRASS
OLYMPIC PIPE LINE COMPANY LLC
A
A
P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_5-8.dwg TAB:S05 Date Exported: 05/19/20 - 10:48 by syiSCALE:
CROSS SECTION A-A'
1" = 4'
0
SCALE IN FEET
4 8
SCALE:
CROSS SECTION B-B'
1" = 4'
0
SCALE IN FEET
4 8
SCALE:
CROSS SECTION C-C'
1" = 4'
0
SCALE IN FEET
4 8
OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL12OPL122452
4
5
2252
3
0
2
3
5
2
2
5 2302352
4
0 240
R
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N
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A
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U
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S
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S. 132ND STREET
84TH AVENUE S.PARCEL
#2144800520
OLYMPIC PIPE LINE COMPANY LLC
A
A
P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_6-8.dwg TAB:S06 Date Exported: 05/19/20 - 12:10 by syiSCALE:
SITE RESTORATION PLAN
1" = 10'
0
SCALE IN FEET
10 20
DATA SOURCE:
DATA FROM CITY OF RENTON GIS DATA AND
AERIAL PHOTO FROM BING AERIAL.
PROJECTION: NAD83 WASHINGTON STATE
PLANES, NORTH ZONE, US FOOT.
W E
N
S
PARCEL BOUNDARY
OLYMPIC PIPELINE (12")
1-FOOT CONTOUR
5-FOOT CONTOUR
LEGEND
STORM DRAIN LINE
WATER LINE
INACTIVE PIPE
GRASS SEED AND MULCH
WITHIN DISTURBANCE AREAS
ASPHALT PAVING
CONCRETE PAVING
RESTORATION PLAN
Table 4.1.3 - Landscaping Seed Mix
CoPPon NaPe Latin NaPe Weight Purity GerPination
Perennial rye blend Lolium perenne 70 98 90
Chewings and red
fescue blend
Festuca rubra var.
commutata or Fes- tuca
rubra
30 98 90
OPL12
REFERENCE: KING COUNTY SURFACE WATER DESIGN MANUAL, 2016 FIGURE D.2.1.2.2 MULCHING,
FIGURE D.2.1.2.6 TEMPORARY AND PERMANENT SEEDING AND FIGURE D.2.1.2.3 NETS AND BLANKETS.
D.2.1.2.2: MULCHING
PURPOSE
THE PURPOSE OF MULCHING SOILS IS TO PROVIDE IMMEDIATE TEMPORARY PROTECTION FROM EROSION. MULCH ALSO ENHANCES PLANT ESTABLISHMENT BY
CONSERVING MOISTURE, HOLDING FERTILIZER, SEED, AND TOPSOIL IN PLACE, AND MODERATING SOIL TEMPERATURES. THERE IS AN ENORMOUS VARIETY OF
MULCHES THAT MAY BE USED. ONLY THE MOST COMMON TYPES ARE DISCUSSED IN THIS SECTION.
CONDITIONS OF USE
AS A TEMPORARY COVER MEASURE, MULCH SHOULD BE USED:
1.ON DISTURBED AREAS THAT REQUIRE COVER MEASURES FOR LESS THAN 30 DAYS.
2.AS A COVER FOR SEED DURING THE WET SEASON AND DURING THE HOT SUMMER MONTHS.
3.DURING THE WET SEASON ON SLOPES STEEPER THAN 3H:1V WITH MORE THAN 10 FEET OF VERTICAL RELIEF.
DESIGN AND INSTALLATION SPECIFICATIONS
FOR MULCH MATERIALS, APPLICATION RATES, AND SPECIFICATIONS, SEE TABLE D.2.1.2.A. NOTE: THICKNESSES MAY BE INCREASED FOR DISTURBED AREAS IN OR
NEAR CRITICAL AREAS OR OTHER AREAS HIGHLY SUSCEPTIBLE TO EROSION.
MAINTENANCE STANDARDS
1.THE THICKNESS OF THE COVER MUST BE MAINTAINED.
2.ANY AREAS THAT EXPERIENCE EROSION SHALL BE REMULCHED AND/OR PROTECTED WITH A NET OR BLANKET. IF THE EROSION PROBLEM IS DRAINAGE
RELATED, THEN THE DRAINAGE PROBLEM SHALL BE ASSESSED AND ALTERNATE DRAINAGE SUCH AS INTERCEPTOR SWALES MAY BE NEEDED TO FIX THE
PROBLEM AND THE ERODED AREA REMULCHED.
D.2.1.2.6: TEMPORARY AND PERMANENT SEEDING
PURPOSE
SEEDING IS INTENDED TO REDUCE EROSION BY STABILIZING EXPOSED SOILS. A WELL-ESTABLISHED VEGETATIVE COVER IS ONE OF THE MOST EFFECTIVE
METHODS OF REDUCING EROSION.
CONDITIONS OF USE
1.SEEDING SHALL BE USED THROUGHOUT THE PROJECT ON DISTURBED AREAS THAT HAVE REACHED FINAL GRADE OR THAT WILL REMAIN UNWORKED FOR
MORE THAN 30 DAYS.
2.VEGETATION-LINED CHANNELS SHALL BE SEEDED. CHANNELS THAT WILL BE VEGETATED SHOULD BE INSTALLED BEFORE MAJOR EARTHWORK AND
HYDROSEEDED OR COVERED WITH A BONDED FIBER MATRIX (BFM).
3.RETENTION/DETENTION PONDS SHALL BE SEEDED AS REQUIRED.
4.AT THE COUNTY'S DISCRETION, SEEDING WITHOUT MULCH DURING THE DRY SEASON IS ALLOWED EVEN THOUGH IT WILL TAKE MORE THAN SEVEN DAYS TO
DEVELOP AN EFFECTIVE COVER. MULCH IS, HOWEVER, RECOMMENDED AT ALL TIMES BECAUSE IT PROTECTS SEEDS FROM HEAT, MOISTURE LOSS, AND
TRANSPORT DUE TO RUNOFF.
5.AT THE BEGINNING OF THE WET SEASON, ALL DISTURBED AREAS SHALL BE REVIEWED TO IDENTIFY WHICH ONES CAN BE SEEDED IN PREPARATION FOR THE
WINTER RAINS (SEE SECTION D.2.4.2). DISTURBED AREAS SHALL BE SEEDED WITHIN ONE WEEK OF THE BEGINNING OF THE WET SEASON. A SKETCH MAP
OF THOSE AREAS TO BE SEEDED AND THOSE AREAS TO REMAIN UNCOVERED SHALL BE SUBMITTED TO THE DPER INSPECTOR. THE DPER INSPECTOR MAY
REQUIRE SEEDING OF ADDITIONAL AREAS IN ORDER TO PROTECT SURFACE WATERS, ADJACENT PROPERTIES, OR DRAINAGE FACILITIES.
6.AT FINAL SITE STABILIZATION, ALL DISTURBED AREAS NOT OTHERWISE VEGETATED OR STABILIZED SHALL BE SEEDED AND MULCHED (SEE SECTION
D.2.4.5).
DESIGN AND INSTALLATION SPECIFICATIONS
1.THE BEST TIME TO SEED IS APRIL 1 THROUGH JUNE 30, AND SEPTEMBER 1 THROUGH OCTOBER 15. AREAS MAY BE SEEDED BETWEEN JULY 1 AND AUGUST
31, BUT IRRIGATION MAY BE REQUIRED IN ORDER TO GROW ADEQUATE COVER. AREAS MAY ALSO BE SEEDED DURING THE WINTER MONTHS, BUT IT MAY
TAKE SEVERAL MONTHS TO DEVELOP A DENSE GROUNDCOVER DUE TO COLD TEMPERATURES. THE APPLICATION AND MAINTENANCE OF MULCH IS
CRITICAL FOR WINTER SEEDING.
2.TO PREVENT SEED FROM BEING WASHED AWAY, CONFIRM THAT ALL REQUIRED SURFACE WATER CONTROL MEASURES HAVE BEEN INSTALLED.
3.THE SEEDBED SHOULD BE FIRM BUT NOT COMPACTED BECAUSE SOILS THAT ARE WELL COMPACTED WILL NOT VEGETATE AS QUICKLY OR THOROUGHLY.
SLOPES STEEPER THAN 3H:1V SHALL BE SURFACE ROUGHENED. ROUGHENING CAN BE ACCOMPLISHED IN A VARIETY OF WAYS, BUT THE TYPICAL METHOD
IS TRACK WALKING, OR DRIVING A CRAWLING TRACTOR UP AND DOWN THE SLOPE, LEAVING CLEAT IMPRINTS PARALLEL TO THE SLOPE CONTOURS.
4.IN GENERAL, 10-20-20 N-P-K (NITROGEN-PHOSPHORUS-POTASSIUM) FERTILIZER MAY BE USED AT A RATE OF 90 POUNDS PER ACRE. SLOW-RELEASE
FERTILIZERS ARE PREFERRED BECAUSE THEY ARE MORE EFFICIENT AND HAVE FEWER ENVIRONMENTAL IMPACTS. IT IS RECOMMENDED THAT AREAS BEING
SEEDED FOR FINAL LANDSCAPING CONDUCT SOIL TESTS TO DETERMINE THE EXACT TYPE AND QUANTITY OF FERTILIZER NEEDED. THIS WILL PREVENT THE
OVER- APPLICATION OF FERTILIZER. DISTURBED AREAS WITHIN 200 FEET OF WATER BODIES AND WETLANDS MUST USE SLOW- RELEASE LOW-PHOSPHORUS
FERTILIZER (TYPICAL PROPORTIONS 3-1-2 N-P-K).
5.THE FOLLOWING REQUIREMENTS APPLY TO MULCHING:
a.MULCH IS ALWAYS REQUIRED FOR SEEDING SLOPES GREATER THAN 3H:1V (SEE SECTION D.2.1.2.2).
b.IF SEEDING DURING THE WET SEASON, MULCH IS REQUIRED.
c.THE USE OF MULCH MAY BE REQUIRED DURING THE DRY SEASON AT THE COUNTY'S DISCRETION IF GRASS GROWTH IS EXPECTED TO BE SLOW, THE
SOILS ARE HIGHLY ERODIBLE DUE TO SOIL TYPE OR GRADIENT, THERE IS A WATER BODY CLOSE TO THE DISTURBED AREA, OR SIGNIFICANT
PRECIPITATION (SEE SECTION D.2.4.2) IS ANTICIPATED BEFORE THE GRASS WILL PROVIDE EFFECTIVE COVER.
d.MULCH MAY BE APPLIED ON TOP OF THE SEED OR SIMULTANEOUSLY BY HYDROSEEDING.
6.HYDROSEEDING IS ALLOWED AS LONG AS TACKIFIER IS INCLUDED. HYDROSEEDING WITH WOOD FIBER MULCH IS ADEQUATE DURING THE DRY SEASON.
DURING THE WET SEASON, THE APPLICATION RATE SHALL BE DOUBLED BECAUSE THE MULCH AND TACKIFIER USED IN HYDROSEEDING BREAK DOWN
FAIRLY RAPIDLY. IT MAY BE NECESSARY IN SOME APPLICATIONS TO INCLUDE STRAW WITH THE WOOD FIBER, BUT THIS CAN BE DETRIMENTAL TO
GERMINATION.
7.AREAS TO BE PERMANENTLY LANDSCAPED SHALL USE SOIL AMENDMENTS. GOOD QUALITY TOPSOIL SHALL BE TILLED INTO THE TOP SIX INCHES TO REDUCE
THE NEED FOR FERTILIZER AND IMPROVE THE OVERALL SOIL QUALITY. MOST NATIVE SOILS WILL REQUIRE THE ADDITION OF FOUR INCHES OF WELL-ROTTED
COMPOST TO BE TILLED INTO THE SOIL TO PROVIDE A GOOD QUALITY TOPSOIL. COMPOST USED SHOULD MEET SPECIFICATIONS PROVIDED IN REFERENCE
11-C OF THE SWDM.
8.THE SEED MIXES LISTED BELOW INCLUDE RECOMMENDED MIXES FOR BOTH TEMPORARY AND PERMANENT SEEDING. THESE MIXES, WITH THE EXCEPTION
OF THE WETLAND MIX, SHALL BE APPLIED AT A RATE OF 120 POUNDS PER ACRE. THIS RATE MAY BE REDUCED IF SOIL AMENDMENTS OR SLOW-RELEASE
FERTILIZERS ARE USED. LOCAL SUPPLIERS SHOULD BE CONSULTED FOR THEIR RECOMMENDATIONS BECAUSE THE APPROPRIATE MIX DEPENDS ON A
VARIETY OF FACTORS, INCLUDING EXPOSURE, SOIL TYPE, SLOPE, AND EXPECTED FOOT TRAFFIC. ALTERNATIVE SEED MIXES APPROVED BY THE COUNTY MAY
BE USED.
MAINTENANCE STANDARDS FOR TEMPORARY AND PERMANENT SEEDING
1.ANY SEEDED AREAS THAT FAIL TO ESTABLISH AT LEAST 80 PERCENT COVER WITHIN ONE MONTH SHALL BE RESEEDED. IF RESEEDING IS INEFFECTIVE, AN
ALTERNATE METHOD, SUCH AS SODDING OR NETS/BLANKETS, SHALL BE USED. IF WINTER WEATHER PREVENTS ADEQUATE GRASS GROWTH, THIS TIME
LIMIT MAY BE RELAXED AT THE DISCRETION OF THE COUNTY WHEN CRITICAL AREAS WOULD OTHERWISE BE PROTECTED.
2.AFTER ADEQUATE COVER IS ACHIEVED, ANY AREAS THAT EXPERIENCE EROSION SHALL BE RE-SEEDED AND PROTECTED BY MULCH. IF THE EROSION
PROBLEM IS DRAINAGE RELATED, THE PROBLEM SHALL BE FIXED AND THE ERODED AREA RE-SEEDED AND PROTECTED BY MULCH.
3.SEEDED AREAS SHALL BE SUPPLIED WITH ADEQUATE MOISTURE, BUT NOT WATERED TO THE EXTENT THAT IT CAUSES RUNOFF.
D.2.1.2.3 NETS AND BLANKETS
PURPOSE
EROSION CONTROL NETS AND BLANKETS ARE INTENDED TO PREVENT EROSION AND HOLD SEED AND MULCH IN PLACE ON STEEP SLOPES AND IN CHANNELS SO
THAT VEGETATION CAN BECOME WELL ESTABLISHED. IN ADDITION, SOME NETS AND BLANKETS CAN BE USED TO PERMANENTLY REINFORCE TURF TO PROTECT
DRAINAGE WAYS DURING HIGH FLOWS. NETS ARE STRANDS OF MATERIAL WOVEN INTO AN OPEN, BUT HIGH-TENSILE STRENGTH NET (FOR EXAMPLE, JUTE
MATTING). BLANKETS ARE STRANDS OF MATERIAL THAT ARE NOT TIGHTLY WOVEN, BUT INSTEAD FORM A LAYER OF INTERLOCKING FIBERS, TYPICALLY HELD
TOGETHER BY A BIODEGRADABLE OR PHOTODEGRADABLE NETTING (FOR EXAMPLE, EXCELSIOR OR STRAW BLANKETS). THEY GENERALLY HAVE LOWER TENSILE
STRENGTH THAN NETS, BUT COVER THE GROUND MORE COMPLETELY. COIR (COCONUT FIBER) FABRIC COMES AS BOTH NETS AND BLANKETS.
CONDITIONS OF USE
EROSION CONTROL NETS AND BLANKETS SHOULD BE USED:
1.FOR PERMANENT STABILIZATION OF SLOPES 2H:1V OR GREATER AND WITH MORE THAN 10 FEET OF VERTICAL RELIEF.
2.IN CONJUNCTION WITH SEED FOR FINAL STABILIZATION OF A SLOPE, NOT FOR TEMPORARY COVER. HOWEVER, THEY MAY BE USED FOR TEMPORARY
APPLICATIONS AS LONG AS THE PRODUCT IS NOT DAMAGED BY REPEATED HANDLING. IN FACT, THIS METHOD OF SLOPE PROTECTION IS SUPERIOR TO
PLASTIC SHEETING, WHICH GENERATES HIGH-VELOCITY RUNOFF (SEE SECTION D.2.1.2.4).
3.FOR DRAINAGE DITCHES AND SWALES (HIGHLY RECOMMENDED). THE APPLICATION OF APPROPRIATE NETTING OR BLANKET TO DRAINAGE DITCHES AND
SWALES CAN PROTECT BARE SOIL FROM CHANNELIZED RUNOFF WHILE VEGETATION IS ESTABLISHED. NETS AND BLANKETS ALSO CAN CAPTURE A GREAT
DEAL OF SEDIMENT DUE TO THEIR OPEN, POROUS STRUCTURE. SYNTHETIC NETS AND BLANKETS MAY BE USED TO PERMANENTLY STABILIZE CHANNELS
AND MAY PROVIDE A COST-EFFECTIVE, ENVIRONMENTALLY PREFERABLE ALTERNATIVE TO RIPRAP.
DESIGN AND INSTALLATION SPECIFICATIONS
1.SEE FIGURE D.2.1.2.B AND FIGURE D.2.1.2.C FOR TYPICAL ORIENTATION AND INSTALLATION OF NETTINGS AND BLANKETS. NOTE: INSTALLATION IS CRITICAL
TO THE EFFECTIVENESS OF THESE PRODUCTS. IF GOOD GROUND CONTACT IS NOT ACHIEVED, RUNOFF CAN CONCENTRATE UNDER THE PRODUCT,
RESULTING IN SIGNIFICANT EROSION.
2.WITH THE VARIETY OF PRODUCTS AVAILABLE, IT IS IMPOSSIBLE TO COVER ALL THE DETAILS OF APPROPRIATE USE AND INSTALLATION. THEREFORE, IT IS
CRITICAL THAT THE DESIGN ENGINEER THOROUGHLY CONSULTS THE MANUFACTURER'S INFORMATION AND THAT A SITE VISIT TAKES PLACE IN ORDER TO
INSURE THAT THE PRODUCT SPECIFIED IS APPROPRIATE.
3.JUTE MATTING MUST BE USED IN CONJUNCTION WITH MULCH (SECTION D.2.1.2.2). EXCELSIOR, WOVEN STRAW BLANKETS, AND COIR (COCONUT FIBER)
BLANKETS MAY BE INSTALLED WITHOUT MULCH. THERE ARE MANY OTHER TYPES OF EROSION CONTROL NETS AND BLANKETS ON THE MARKET THAT MAY
BE APPROPRIATE IN CERTAIN CIRCUMSTANCES. OTHER TYPES OF PRODUCTS WILL HAVE TO BE EVALUATED INDIVIDUALLY. IN GENERAL, MOST NETS (E.G.,
JUTE MATTING) REQUIRE MULCH IN ORDER TO PREVENT EROSION BECAUSE THEY HAVE A FAIRLY OPEN STRUCTURE. BLANKETS TYPICALLY DO NOT REQUIRE
MULCH BECAUSE THEY USUALLY PROVIDE COMPLETE PROTECTION OF THE SURFACE.
4.PURELY SYNTHETIC BLANKETS ARE ALLOWED BUT SHALL ONLY BE USED FOR LONG-TERM STABILIZATION OF WATERWAYS. THE ORGANIC BLANKETS
AUTHORIZED ABOVE ARE BETTER FOR SLOPE PROTECTION AND SHORT-TERM WATERWAY PROTECTION BECAUSE THEY RETAIN MOISTURE AND PROVIDE
ORGANIC MATTER TO THE SOIL, SUBSTANTIALLY IMPROVING THE SPEED AND SUCCESS OF RE-VEGETATION.
MAINTENANCE STANDARDS
1.GOOD CONTACT WITH THE GROUND MUST BE MAINTAINED, AND THERE MUST NOT BE EROSION BENEATH THE NET OR BLANKET.
2.ANY AREAS OF THE NET OR BLANKET THAT ARE DAMAGED OR NOT IN CLOSE CONTACT WITH THE GROUND SHALL BE REPAIRED AND STAPLED.
3.IF EROSION OCCURS DUE TO POORLY CONTROLLED DRAINAGE, THE PROBLEM SHALL BE FIXED AND THE ERODED AREA PROTECTED.
OLYMPIC PIPE LINE COMPANY LLC
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P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_7-8.dwg TAB:S07 Date Exported: 05/19/20 - 12:10 by syiREFERENCE: CITY OF RENTON - NOTES FROM DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT. DETAILS FROM PUBLIC WORKS DEPARTMENT.
APPLICATION
THE FOLLOWING STANDARDS IN THIS SECTION SHALL BE FOLLOWED WHEN DOING TRENCH OR EXCAVATION WORK WITHIN THE PAVED PORTION OF ANY CITY OF RENTON RIGHT-OF-WAY. MODIFICATIONS OR EXEMPTIONS
TO THESE STANDARDS MAY BE AUTHORIZED BY THE COMMUNITY AND ECONOMIC DEVELOPMENT ADMINISTRATOR, OR AUTHORIZED REPRESENTATIVE, UPON WRITTEN REQUEST BY THE PERMITTEE, THE PERMITTEE'S
CONTRACTOR OR ENGINEER, AND DEMONSTRATION OF AN EQUIVALENT ALTERNATIVE.
HOURS OF OPERATIONS
HOURS FOR WORK WITHIN THE ROADWAY FOR ASPHALT OVERLAYS OR TRENCH RESTORATION SHALL BE AS DIRECTED BY THE TRAFFIC CONTROL PLAN REQUIREMENTS AND THE TRAFFIC OPERATIONS ENGINEER.
INSPECTION
THE ENGINEER MAY DETERMINE IN THE FIELD THAT A FULL STREET-WIDTH (EDGE-OF-PAVEMENT TO EDGE-OF-PAVEMENT) OVERLAY IS REQUIRED DUE TO CHANGES IN THE PERMIT CONDITIONS SUCH AS, BUT NOT LIMITED
TO THE FOLLOWING:
1.THERE HAS BEEN DAMAGE TO THE EXISTING ASPHALT SURFACE DUE TO THE CONTRACTOR'S EQUIPMENT.
2.THE TRENCH WIDTH WAS INCREASED SIGNIFICANTLY OR THE EXISTING PAVEMENT IS UNDERMINED OR DAMAGED.
3.ANY OTHER CONSTRUCTION RELATED ACTIVITIES THAT REQUIRE ADDITIONAL PAVEMENT RESTORATION.
CITY OF RENTON STANDARDS
ALL MATERIALS AND WORKMANSHIP SHALL BE IN ACCORDANCE WITH THE CITY OF RENTON STANDARD AND SUPPLEMENTAL SPECIFICATIONS (CURRENT ADOPTED VERSION) EXCEPT WHERE OTHERWISE NOTED IN THESE
STANDARDS. MATERIALS AND WORKMANSHIP ARE REQUIRED TO BE IN CONFORMANCE WITH STANDARDS FOR THE STANDARD SPECIFICATIONS FOR ROAD, BRIDGE, AND MUNICIPAL CONSTRUCTION PREPARED BY THE
WASHINGTON STATE CHAPTER OF THE AMERICAN PUBLIC WORKS ASSOCIATION (APWA) AND THE WASHINGTON STATE DEPARTMENT OF TRANSPORTATION (WSDOT) AND SHALL COMPLY WITH THE CURRENT EDITION, AS
MODIFIED BY THE CITY OF RENTON SUPPLEMENTAL SPECIFICATIONS.
1.AN ASPHALT PAVER SHALL BE USED IN ACCORDANCE WITH SECTION 5-04.3(3) OF STANDARD SPECIFICATIONS. A “LAYTON BOX” OR EQUAL MAY BE USED IN PLACE OF THE POWER-PROPELLED PAVER. ROLLERS
SHALL BE USED IN ACCORDANCE WITH SECTION 5- 04.3(4) OF THE STANDARD SPECIFICATIONS. “PLATE COMPACTORS” AND “JUMPING JACKS” SHALL NOT BE USED IN LIEU OF ROLLERS.
2.TRENCH BACKFILL AND RESURFACING SHALL BE AS SHOWN IN THE CITY OF RENTON STANDARD DETAILS, UNLESS MODIFIED BY THE CITY PERMIT. SURFACING DEPTHS SHOWN IN THE STANDARD DETAILS ARE
MINIMUMS AND MAY BE INCREASED BY THE ENGINEER TO MEET TRAFFIC LOADS OR SITE CONDITIONS.
3.REQUIREMENT FOR PATCHING, OVERLAY, AND OVERLAY WIDTHS:
ALL TRENCH AND PAVEMENT CUTS SHALL BE MADE BY SAWCUT OR BY GRINDING. SAWCUTS OR GRINDING SHALL BE A MINIMUM OF ONE FOOT (1') OUTSIDE THE TRENCH WIDTH. THE TOP TWO INCHES (2") OF
ASPHALT SHALL BE GROUND DOWN TO A MINIMUM DISTANCE OF ONE FOOT (1') BEYOND THE ACTUAL OUTSIDE EDGES OF THE TRENCH AND SHALL BE REPLACED WITH TWO INCHES (2") OF CLASS B ASPHALT, PER
CITY OF RENTON STANDARD PLANS. AT THE DISCRETION OF THE ENGINEER, A FULL STREET WIDTH OVERLAY MAY BE REQUIRED.
LANE-WIDTH OR A FULL STREET-WIDTH OVERLAY WILL BE DETERMINED BASED UPON THE LOCATION AND LENGTH OF THE PROPOSED TRENCH WITHIN THE ROADWAY CROSS-SECTION. CHANGES IN FIELD
CONDITIONS MAY WARRANT IMPLEMENTATION OF ADDITIONAL OVERLAY REQUIREMENTS.
a.TRENCHES (ROAD CROSSINGS):
(1)THE MINIMUM WIDTH OF A TRANSVERSE PATCH (ROAD CROSSING) SHALL BE SIX AND ONE-HALF FEET (6.5'). SEE CITY OF RENTON STANDARD PLANS.
(2)ANY AFFECTED LANE WILL BE GROUND DOWN TWO INCHES (2") AND PAVED FOR THE ENTIRE WIDTH OF THE LANE.
(3)THE PATCH SHALL BE A MINIMUM OF ONE FOOT (1') BEYOND THE EXCAVATION AND PATCH LENGTH SHALL BE A MINIMUM OF AN ENTIRE TRAVELED LANE.
(4)IF THE OUTSIDE OF THE TRENCHING IS WITHIN THREE FEET (3') OF ANY ADJACENT LANE LINE, THE ENTIRE ADJACENT TRAVELED LANE AFFECTED WILL BE REPAVED.
(5)AN AREA INCLUDING THE TRENCH AND ONE FOOT (1') ON EACH SIDE OF THE TRENCH BUT NOT LESS THAN SIX AND ONE- HALF FEET (6.5') TOTAL FOR THE ENTIRE WIDTH OF THE AFFECTED TRAVELED LANES
WILL BE GROUND DOWN TO A DEPTH OF TWO INCHES (2"). A TWO-INCH (2") OVERLAY OF CLASS B ASPHALT WILL BE APPLIED PER CITY STANDARDS.
b.TRENCHES RUNNING PARALLEL WITH THE STREET:
(1)THE MINIMUM WIDTH OF A LONGITUDINAL PATCH SHALL BE FOUR AND ONE-HALF FEET (4.5'). SEE CITY OF RENTON STANDARD PLANS.
(2)IF THE TRENCHING IS WITHIN A SINGLE TRAVELED LANE, AN ENTIRE LANE-WIDTH OVERLAY WILL BE REQUIRED.
(3)IF THE OUTSIDE OF THE TRENCHING IS WITHIN THREE FEET (3') OF ANY ADJACENT LANE LINE, THE ENTIRE ADJACENT TRAVELED LAND AFFECTED WILL BE OVERLAID.
(4)IF THE TRENCHING IS GREATER THAN OR EQUAL TO 30% OF LANE PER BLOCK (660 FOOT MAXIMUM BLOCK LENGTH), OR IF THE TOTAL PATCHES EXCEED 12 PER BLOCK, THEN THE LANES AFFECTED WILL BE
OVERLAID. MINIMUM OVERLAY SHALL INCLUDE ALL PATCHES WITHIN THE BLOCK SECTION.
(5)THE ENTIRE TRAVELED LANE WIDTH FOR THE LENGTH OF THE TRENCH AND AN ADDITIONAL TEN FEET (10′) AT EACH END OF THE TRENCH WILL BE GROUND DOWN TO A DEPTH OF TWO INCHES (2′′). A TWO-INCH
(2′′) OVERLAY OF CLASS B WILL BE APPLIED PER CITY STANDARDS.
4.PAVEMENT REMOVAL IN LIEU OF GRINDING:
THE CONTRACTOR IN ALL CASES CAN REMOVE THE PAVEMENT IN THE REPLACEMENT AREA INSTEAD OF GRINDING OUT THE SPECIFIED TWO INCHES (2") OF ASPHALT. FULL PAVEMENT REPLACEMENT TO MEET OR
EXCEED THE EXISTING PAVEMENT DEPTH WILL BE REQUIRED FOR THE AREA OF PAVEMENT REMOVAL. PATCHING OF PERVIOUS CONCRETE SHALL FOLLOW AMERICAN CONCRETE INSTITUTE (ACI) 522.1-13. POROUS
ASPHALT SHALL BE SPECIFIED ON A PROJECT-BY-PROJECT BASIS BY THE ENGINEER. PERMEABLE MATERIALS SHOULD BE REPLACED IN-KIND WHERE FEASIBLE. PATCHING POROUS ASPHALT WITH CONVENTIONAL
ASPHALT IS ACCEPTABLE IF IT IS NO MORE THAN TEN PERCENT (10%) OF THE TOTAL FACILITY AREA OR DOES NOT IMPACT THE OVERALL FACILITY FUNCTION. APPROPRIATE PRECAUTIONS SHALL BE TAKEN DURING
PAVEMENT REPAIR AND REPLACEMENT EFFORTS TO PREVENT CLOGGING OF ADJACENT SURFACES.
5.TRENCH BACKFILL AND RESTORATION CONSTRUCTION REQUIREMENTS:
a.TRENCH RESTORATION SHALL BE EITHER BY A PATCH OR OVERLAY METHOD, AS REQUIRED AND INDICATED ON CITY OF RENTON STANDARD PLANS.
b.ALL TRENCH AND PAVEMENT CUTS, WHICH WILL NOT BE OVERLAID, SHALL BE MADE BY SAWCUT OR GRINDING. SAWCUTS SHALL BE A MINIMUM OF TWO FEET (2') OUTSIDE THE EXCAVATED TRENCH WIDTH.
c.ALL TRENCHING WITHIN THE TOP FOUR FEET (4') SHALL BE BACKFILLED WITH CRUSHED SURFACING MATERIALS CONFORMING TO SECTION 4-04 OF THE STANDARD SPECIFICATIONS. ANY TRENCHING OVER FOUR
FEET (4') IN DEPTH MAY USE MATERIALS APPROVED BY THE ENGINEER OR MATERIALS LAB FOR BACKFILLING BELOW THE FOUR-FOOT (4') DEPTH.
d.IF THE EXISTING MATERIAL (OR OTHER MATERIAL) IS DETERMINED BY THE ENGINEER TO BE SUITABLE FOR BACKFILL, THE CONTRACTOR MAY USE THE NATIVE MATERIAL EXCEPT THAT THE TOP SIX INCHES (6")
SHALL BE CRUSHED SURFACING TOP COURSE MATERIAL.
e.THE TRENCH SHALL BE COMPACTED TO A MINIMUM NINETY-FIVE PERCENT (95%) DENSITY, AS DESCRIBED IN SECTION 2- 03 OF THE STANDARD SPECIFICATIONS. IN THE TOP SIX FEET (6') OF ANY TRENCH,
BACKFILL COMPACTION SHALL BE PERFORMED IN EIGHT (8) TO TWELVE-INCH (12") LIFTS. ANY TRENCH DEEPER THAN SIX FEET (6') MAY BE COMPACTED IN TWENTY-FOUR INCH (24") LIFTS, UP TO THE TOP SIX-FOOT
(6') ZONE. ALL TRENCH BACKFILL SHALL BE FIRM AND UNYIELDING BUT IN NO CASE SHALL BE COMPACTED TO MORE THAN NINETY-TWO PERCENT (92%) OF MAXIMUM DENSITY IN PERMEABLE PAVEMENT AREAS.
f.ALL COMPACTION SHALL BE PERFORMED BY MECHANICAL METHODS. THE COMPACTION TESTS MAY BE PERFORMED IN FOUR-FOOT (4') VERTICAL INCREMENTS MAXIMUM. THE TEST RESULTS SHALL BE GIVEN TO
THE ENGINEER FOR REVIEW AND APPROVAL PRIOR TO PAVING. THE NUMBER AND LOCATION OF TESTS REQUIRED SHALL BE DETERMINED BY THE ENGINEER.
d.TEMPORARY RESTORATION OF TRENCHES FOR OVERNIGHT USE SHALL BE ACCOMPLISHED BY USING MC MIX (COLD MIX), ASPHALT TREATED BASE (ATB), OR STEEL PLATES, AS APPROVED BY THE ENGINEER. ATB
USED FOR TEMPORARY RESTORATION MAY BE DUMPED DIRECTLY INTO THE TRENCH, BLADED OUT AND ROLLED. AFTER ROLLING, THE TRENCH MUST BE FILLED FLUSH WITH ASPHALT TO PROVIDE A SMOOTH
RIDING SURFACE. IF THE TEMPORARY TRENCH RESTORATION DOES NOT HOLD UP, THE CONTRACTOR SHALL REPAIR THE PATCH WITHIN EIGHT HOURS OF BEING NOTIFIED OF THE PROBLEM BY THE CITY. THIS
REQUIREMENT APPLIES 24 HOURS PER DAY, SEVEN DAYS PER WEEK. IN THE EVENT THAT THE CITY DETERMINES TO REPAIR THE TEMPORARY PATCH, THE CONTRACTOR SHALL REIMBURSE THE CITY IN AN AMOUNT
THAT IS DOUBLE THE CITY'S COSTS IN REPAIRING THE PATCH, WITH THE SECOND HALF OF THE REIMBURSEMENT TO REPRESENT CITY OVERHEAD AND HIDDEN COSTS.
e.ASPHALT CONCRETE CLASS E OR CLASS B SHALL BE PLACED TO THE COMPACTED DEPTH AS REQUIRED AND INDICATED ON CITY OF RENTON STANDARD PLANS OR AS DIRECTED BY THE ENGINEER. THE GRADE OF
ASPHALT SHALL BE AR-4000W. THE MATERIALS SHALL BE MADE IN CONFORMANCE WITH SECTION 9-02.1(4) OF THE STANDARD SPECIFICATIONS.
f.TACK COAT SHALL BE APPLIED TO THE EXISTING PAVEMENT AT EDGE OF SAW CUTS AND SHALL BE EMULSIFIED ASPHALT GRADE CSS-1, AS SPECIFIED IN SECTION 9-02.1(6) OF THE STANDARD SPECIFICATIONS.
TACK SHALL BE APPLIED AS SPECIFIED IN SECTION 5-04 OF THE STANDARD SPECIFICATIONS.
g.ASPHALT CONCRETE CLASS E OR CLASS B SHALL BE PLACED IN ACCORDANCE WITH SECTION 5-04 OF THE STANDARD SPECIFICATIONS; EXCEPT THOSE LONGITUDINAL JOINTS BETWEEN SUCCESSIVE LAYERS OF
ASPHALT CONCRETE SHALL BE DISPLACED LATERALLY A MINIMUM OF TWELVE INCHES (12"), UNLESS OTHERWISE APPROVED BY THE ENGINEER. FINE AND COARSE AGGREGATE SHALL BE IN ACCORDANCE WITH
SECTION 9-03.8 OF THE STANDARD SPECIFICATIONS.
ALL STREET SURFACES, WALKS OR DRIVEWAYS WITHIN THE STREET TRENCHING AREAS SHALL BE FEATHERED AND SHIMMED TO AN EXTENT THAT PROVIDES A SMOOTH-RIDING CONNECTION AND EXPEDITIOUS
DRAINAGE FLOW FOR THE NEWLY PAVED SURFACE.
FEATHERING AND SHIMMING SHALL NOT DECREASE THE MINIMUM VERTICAL CURB DEPTH BELOW FOUR INCHES (4") FOR STORM WATER FLOW. THE ENGINEER MAY REQUIRE ADDITIONAL GRINDING TO INCREASE
THE CURB DEPTH AVAILABLE FOR STORM WATER FLOW IN AREAS THAT ARE INADEQUATE. SHIMMING AND FEATHERING AS REQUIRED BY THE ENGINEER SHALL BE ACCOMPLISHED BY RAKING OUT THE
OVERSIZED AGGREGATES FROM THE CLASS B MIX AS APPROPRIATE.
SURFACE SMOOTHNESS SHALL BE PER SECTION 5-04.3(13) OF THE STANDARD SPECIFICATIONS. THE PAVING SHALL BE CORRECTED BY REMOVAL AND REPAVING OF THE TRENCH ONLY. ASPHALT PATCH DEPTHS
WILL VARY BASED UPON THE STREETS BEING TRENCHED. THE ACTUAL DEPTHS OF ASPHALT AND THE WORK TO BE PERFORMED SHALL BE AS REQUIRED AND INDICATED ON CITY OF RENTON STANDARD PLANS.
COMPACTION OF ALL LIFTS OF ASPHALT SHALL BE A MINIMUM NINETY-TWO PERCENT (92%) OF DENSITY AS DETERMINED BY WSDOT TEST METHOD 705. THE NUMBER OF TESTS REQUIRED SHALL BE
DETERMINED BY THE ENGINEER.
TESTING SHALL BE PERFORMED BY AN INDEPENDENT TESTING LAB WITH THE RESULTS BEING SUPPLIED TO THE ENGINEER. TESTING IS NOT INTENDED TO RELIEVE THE CONTRACTOR FROM ANY LIABILITY FOR
THE TRENCH RESTORATION. IT IS INTENDED TO SHOW THE INSPECTOR, AND THE CITY, THAT THE RESTORATION MEETS THESE SPECIFICATIONS.
h.ALL JOINTS, EXCEPT THOSE ASSOCIATED WITH PERMEABLE PAVEMENT, SHALL BE SEALED USING PAVING ASPHALT AR- 4000W.
i.WHEN TRENCHING WITHIN THE UNPAVED ROADWAY SHOULDER(S), THE SHOULDER SHALL BE RESTORED TO ITS ORIGINAL CONDITION, OR BETTER.
j.THE FINAL PATCH SHALL BE COMPLETED AS SOON AS POSSIBLE AND SHALL NOT EXCEED FIFTEEN (15) WORKING DAYS AFTER FIRST OPENING THE TRENCH. THIS TIME FRAME MAY BE ADJUSTED IF DELAYS ARE
DUE TO INCLEMENT PAVING WEATHER OR OTHER ADVERSE CONDITIONS THAT MAY EXIST. HOWEVER, DELAYING OF FINAL PATCH OR OVERLAY WORK IS SUBJECT TO THE ENGINEER'S APPROVAL. THE ENGINEER
MAY DEEM IT NECESSARY TO COMPLETE THE WORK WITHIN THE FIFTEEN (15) WORKING DAY TIME FRAME AND NOT ALLOW ANY TIME EXTENSION. SHOULD THIS OCCUR, THE CONTRACTOR SHALL PERFORM THE
NECESSARY WORK, AS DIRECTED BY THE ENGINEER.
k.A CITY OF RENTON TEMPORARY TRAFFIC CONTROL PLAN (FROM RENTON TRANSPORTATION ENGINEERING) SHALL BE SUBMITTED AND APPROVED BY THE ENGINEER A MINIMUM OF THREE (3) WORKING DAYS
PRIOR TO COMMENCEMENT OF WORK.
6.REMOVAL OF UTILITY LOCATE MARKINGS FROM SIDEWALKS REQUIRED:
THE PERMITTEE WILL BE REQUIRED TO REMOVE UTILITY LOCATE MARKS ON SIDEWALKS ONLY WITHIN THE CENTER DOWNTOWN ZONE. THE PERMITTEE SHALL REMOVE THE UTILITY LOCATE MARKS WITHIN 14 DAYS
OF JOB COMPLETION.
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P:\0\0894126\CAD general\44\12RS UTWM Dig Sites 2019-01\12RS UTWM Dig Sites 2019-01-A_8-8.dwg TAB:S08 Date Exported: 05/19/20 - 12:25 by syiREFERENCE: CITY OF RENTON - DETAILS FROM PUBLIC WORKS DEPARTMENT.