Item-16-Reso-378-Scenic-repair — Fairfax City Council, August 3, 2022

AGENDA ITEM #16

TOWN OF FAIRFAX

STAFF REPORT
August 3, 2022
TO: Mayor and Town Council
FROM: Heather Abrams, Town Manager
SUBJECT: Adopt Resolution Authorizing Notice Inviting Bids for 378 Scenic Road Storm Damage Repair, Town Project No. 51-813
_________________________________________________________________________________

RECOMMENDATION
Adopt the attached resolution authorizing notice inviting bids

DISCUSSION
A new reinforced concrete wall will be constructed to repair a small landslide that occurred along a relatively steep cut slope on the inboard (upslope) side of the roadway near 378 Scenic Road.

The wall will be up to about 36-feet-long, 8-feet-tall and will be supported on a continuous spread footing. The wall alignment will be configured to provide an eight-foot-wide paved parking space adjacent to the structure. The wall will be backfilled with native soils up to the top of the wall and rip rap will be placed to restore the slope above the wall. The proposed retaining wall and related improvements are shown on the attached project plans.

As there is another similar repair project near 78 Wreden Avenue, staff will consider combining the two projects into a single bid solicitation in order to encourage more competitive bids and streamline construction contract oversight.

FISCAL IMPACT
The engineer’s construction cost estimate for this project is $170,000. Actual project costs are unknown until the contractor bids are opened. Funding for this project was approved in the current (FY2022-23) CIP budget.

ATTACHMENTS
A. Resolution
B. Plans

ATTACHMENT A
RESOLUTION 22-__

A RESOLUTION OF THE TOWN COUNCIL OF THE TOWN OF FAIRFAX AUTHORIZING NOTICE INVITING BIDS FOR CONSTRUCTION OF 378 SCENIC ROAD

STORM DAMAGE REPAIR PROJECT
WHEREAS, an appropriation of $200,000 for construction of Capital Project No. 51-813, 378 Scenic Road Storm Damage Repair (“the Project”), was approved in the current adopted budget; and
WHEREAS, delivery of the Project utilizing all of the appropriated funds requires that the Town invite formal bids as provided for in the Town Code and under the California Uniform Construction Cost Accounting Act of 1983; and
WHEREAS, the Project is categorically exempt from the application of the California Environmental Quality Act (“CEQA”) under Class 1 inasmuch as it involves the repair of an existing facility.

NOW, THERFORE, BE IT RESOLVED, that the Fairfax Town Council hereby authorizes issuance of notice inviting construction bids for the Project and authorizes the Town Manager to do everything necessary and proper to complete the bid package and notice the request for bids.

The foregoing Resolution was duly passed and adopted at a regular meeting of the Town Council of the Town of Fairfax, at a regular meeting held on the 3rd day of August 2022, by the following vote, to wit:

AYES:

NOES:

ABSENT:
_______________________________
Stephanie Hellman, Mayor
Attest: ___________________________
Michele Gardner, Town Clerk
SCENIC AVUNUE 402 SCENIC ROAD 378 SCENIC ROAD 377 SCENIC ROAD 365 SCENIC ROAD PROPERTY BOUNDARY, TYP

SCENIC ROAD

SCENIC ROAD (N) RETAINING WALL AND PARKING AREA
RIDGE ROAD BASIC DEVELOPMENT LENGTH (Ld) (IN) BAR SIZE f'c<2500 PSI f'c=3000 PSI f'c>3500 PSI TOP BARS OTHER BARS TOP BARS OTHER BARS TOP BARS OTHER BARS # 3 # 4 # 5 # 6 # 7 # 8 # 9 BAR SPLICE LENGTH SCHEDULE (Ls) (IN) BAR SIZE TOP BARS OTHER BARS TOP BARS OTHER BARS TOP BARS OTHER BARS # 3 # 4 # 5 # 6 # 7 # 8 # 9 18243036415063 14182327323848 16222732384557 13172125293644 15202530354253 12161923273241 23313947536582 18233035425062 21293542495974 17222733384757 20263339556270 16212530424854 4d OR 2 1/2" MIN. D d PRINCIPAL REINFORCEMENT BAR GRADES BAR SIZE MIN BEND DIA. 'D' ALL GRADES OF REIN- FORCEMENT # 3 THRU # 8 6d8d 10d GRADE 40* 5d STIRRUPS AND TIE REINFORCEMENT BAR SIZE MIN BEND DIA. 'D' #3 THRU #5 ALL OTHER BARS 4d SEE TABLE ABOVE 180° BEND # 9 THRU # 11 # 14 THRU # 18 # 3 THRU # 11d 12d 90° BEND
3" MIN
6d
d 135° BEND
D
D f'c<2500 PSI f'c=3000 PSI f'c=4000 PSI
LdhLdh
Ldh HOOK DEVELOPMENT LENGTH (Ldh) (IN) BAR SIZE f'c<2500 PSI f'c=3000 PSI f'c=4000 PSI # 3 # 4 # 5 # 6 # 7 # 8 # 9 9121518212428
8111416192225
8101315182023
Ls
Ld COLD JOINT SITE LOCATION MAP (NO SCALE) PROPERTY MAP (SCALE: 1" = 15'-0") SITE TOWN OF FAIRFAX ROADWAY STABILIZATION SCENIC ROAD AT RIDGE ROAD FAIRFAX, CA SCALE 0 7.5 15 30 FEET ABBREVIATIONS & SYMBOLS APPROX APPROXIMATELY (N) NEW BW BOTTOM OF WALL ELEVATION STD DET CALTRANS STANDARD DETAIL (E) EXISTING TW TOP OF WALL ELEVATION FT FEET IN INCH LF LINEAR FEET APPROX BORING LOCATION BY MILLER PACIFIC, 2019 UCS MARIN CO. UNIFORM CONSTRUCTION STANDARDS INDEX OF SHEETS SHEET NO. SHEET TITLE 1 TITLE SHEET & NOTES
2 SITE PLAN - EXISTING CONDITIONS
3 RETAINING WALL PLAN & DETAILS
4 BORING LOGS
5 EROSION & SEDIMENT CONTROL
NORTH
Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

Suite 220
Novato, CA 94947
T 415 / 382-3444
F 415 / 382-3450
www.millerpac.com
A CALIFORNIA CORPORATION, © 2021, ALL RIGHTS RESERVED
Date Mark Description
Revisions
By
FILE: 201.175 Plans, Rev 1.dwg
Date
Date
Date

TITLE SHEET & NOTES
1 Roadway Stabilization
Scenic Road at Ridge Road
Fairfax, California
201.175
RCA
RCA
SAS
RCA BID SET 2/1/2021 GENERAL 1. ALL CONDITIONS AND DIMENSIONS SHOWN ON THE PLANS SHALL BE VERIFIED BY THE CONTRACTOR. ANY DISCREPANCIES THAT REQUIRE CLARIFICATION OR REVISIONS SHALL BE BROUGHT TO THE ATTENTION OF THE ENGINEER BEFORE STARTING WORK. 2. THE CONTRACTOR SHALL POSSES A CLASS "A" LICENSE. 3. THE CONTRACTOR SHALL SUPERVISE AND DIRECT THE WORK AND SHALL BE SOLELY RESPONSIBLE FOR ALL CONSTRUCTION MEANS, METHODS, PROCEDURES, TECHNIQUES, SAFETY, AND SEQUENCE. 4. CONTRACTOR SHALL NOTIFY UNDERGROUND SERVICE ALERT PRIOR TO START OF ANY CONSTRUCTION. CONTRACTOR SHALL NOTIFY ALL PUBLIC OR PRIVATE UTILITY COMPANIES A MINIMUM OF 48 HOURS PRIOR TO COMMENCEMENT OF WORK ADJACENT TO EXISTING UTILITY LINES. 5. CONTRACTOR SHALL BE RESPONSIBLE FOR THE VERIFICATION OF ALL EXISTING UTILITIES IN THE FIELD. ANY UTILITIES DAMAGED BY THE CONTRACTOR SHALL BE REPAIRED BY THE CONTRACTOR AT THE CONTRACTOR'S EXPENSE. 6. TOWN OF FAIRFAX ENCROACHMENT PERMIT IS REQUIRED FOR ALL WORK, INCLUDING STAGING OF MATERIALS AND EQUIPMENT IN THE PUBLIC RIGHT-OF-WAY. THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING AN ENCROACHMENT PERMIT IN ACCORDANCE WITH THE PERMIT REQUIREMENTS. 7. THE CONTRACTOR SHALL HAUL AWAY ALL UNUSED/EXCESS EXCAVATED MATERIAL OFF SITE FOR LEGAL DISPOSAL. 8. NO CONSTRUCTION MATERIALS, EQUIPMENT, DEBRIS OR WASTE SHALL BE PLACED OR STORED WHERE IT MAY BE SUBJECT TO WIND OR RAIN EROSION AND DISPERSION. 9. WORKMANSHIP TO BE PERFORMED IN ACCORDANCE WITH THESE PLANS AND SPECIFICATIONS ALONG WITH 2018 CALTRANS STANDARD SPECIFICATIONS, MARIN COUNTY AND CITY OF SAUSALITO STANDARDS AND GENERALLY ACCEPTED CONSTRUCTION PRACTICES. SURVEY NOTES 1. TOPOGRAPHY BASED ON A FIELD SURVEY PERFORMED BY WILLIS SURVEYING IN XXX, 2017. CONTOURS ARE SHOWN EVERY TWO VERTICAL FEET . 2. VERTICAL DATUM: XXXXX (TO BE UPDATED BASED ON INFO PROVIDED BY WILLIS LAND SURVEY) 3. HORIZONTAL DATUM: XXXXX (TO BE UPDATED BASED ON INFO PROVIDED BY WILLIS LANDSURVE). CONCRETE: 1. ALL WORK SHALL BE IN ACCORDANCE WITH THE LATEST EDITION OF ACI 301: SPECIFICATION FOR STRUCTURAL CONCRETE FOR BUILDINGS. ALL STRUCTURAL CONCRETE SHALL COMPLY WITH THE PROVISIONS OF ACI 318-14. 2. ALL CONCRETE SHALL BE NORMAL WEIGHT AND READY-MIXED WITH A MAXIMUM WATER TO CEMENT RATIO 0.45 AND A MAXIMUM MEASURED SLUMP OF 4 INCHES. 3. ALL AGGREGATE SHALL CONCORM TO ASTM C33. 4. ALL WATER SHALL BE CLEAN, POTABLE AND NOT DETRIMENTAL TO THE CONCRETE. 5. CONCRETE SHALL HAVE A MINIMUM 28-DAY COMPRESSIVE STRENGTH OF 4,000 PSI. REINFORCING STEEL: 1. REINFORCING STEEL SHALL CONFORM TO ASTM A615, GR 60 2. CONCRETE COVER SHALL BE A MINIMUM OF 3 INCHES 3. REINFORCING STEEL BENDS, DEVELOPMENT LENGTHS, SPLICES AND HOOKS SHALL BE IN ACCORDANCE AS SHOWN BELOW: SPECIAL INSPECTIONS: 1. SPECIAL INSPECTIONS SHALL BE COMPLETED IN CONFORMANCE WITH SECTION 1704 & 1705 OF THE 2019 CALIFORNIA BUILDING CODE AND THE APPROVED SPECIAL INSPECTION AGREEMENT, WHERE SUCH AN AGREEMENT IS REQUIRED BY THE BUILDING DEPARTMENT. 2. THE CONTRACTOR SHALL NOTIFY THE SPECIAL INSPECTION AGENCY A MINIMUM OF 48 HOURS PRIOR TO ANY REQUESTED SPECIAL INSPECTIONS. 3. AT A MINIMUM, THE FOLLOWING WORK SHALL BE SUBJECT TO SPECIAL INSPECTION BY AN APPROVED AGENCY EMPLOYED BY THE OWNER. 3.1 FOUNDATION EXCAVATION: OBSERVATION BY PROJECT GEOTECHNICAL ENGINEER PRIOR TO PLACEMENT OF REINFORCEMENT. 3.2 REINFORCEMENT: OBSERVATION PRIOR TO CONCRETE PLACEMENT 3.3 CONCRETE: OBSERVATION DURING PLACEMENT. AS REQUESTED BY ENGINEER, CONCRETE SHALL BE SAMPLED, SLUMP SHALL BE MEASURED AND CYLINDERS SHALL BE CAST FOR STRENGTH TESTING IN CONFORMANCE WITH ASTM C39. A MINIMUM OF 1 CYLINDER SHALL BE TESTED AT 3 DAYS AND A MINIMUM OF 3 CYLINDERS SHALL BE TESTED AT 28 DAYS. 3.4 WALL DRAINAGE: OBSERVATION OF DRAINAGE PIPE AND MATERIALS PRIOR TO BACKFILL. 3.5 WALL BACKFILL: OBSERVATION AND FIELD DENSITY TESTING OF BACKFILL MATERIALS DURING PLACEMENT AND COMPACTION 3.6 PAVEMENT: OBSERVATION AND FIELD DENSITY TESTING OF SUBGRADE, AGGREGATE BASE AND ASPHALT FOR NEW PAVEMENT SECTION EROSION AND SEDIMENT CONTROL 1. EROSION AND SEDIMENT CONTROL MEASURES SHALL COMPLY WITH ALL REQUIREMENTS OUTLINED IN THE MARIN COUNTY STORMWATER POLLUTION PREVENTION PROGRAM (MCSTOPPP) MINIMUM CONTROL MEASURES FOR SMALL CONSTRUCTION PROJECTS AS OUTLINED IN THE MCSTOPPP CONSTRUCTION EROSION AND SEDIMENT CONTROL PLAN APPLICANT PACKAGE. 2. ANY AREAS IN WHICH GROUND SURFACE AND VEGETATIVE COVER HAS BEEN DISTURBED BY CONSTRUCTION ACTIVITIES SHALL BE COVERED WITH A PRE-APPROVED SEED MIX AND BIODEGRADABLE EROSION CONTROL MATS UPON COMPLETION OF CONSTRUCTION. 3. EROSION CONTROL MATS SHALL CONSIST OF NORTH AMERICAN GREEN S150 OR APPROVED EQUAL. 4. STRAW WATTLES SHALL CONSIST OF NORTH AMERICAN GREEN SEDIMAX - SWB9 OR APPROVED EQUAL. RIP RAP 1. RIP RAP SHALL CONFORM TO CLASS 2 ROCK SLOPE PROTECTION IN ACCORDANCE WITH SECTION 72 OF THE 2018 CALTRANS STANDARD SPECIFICATIONS. 2. FABRIC SHALL CONSIST OF MIRAFI 180N OR APPROVED EQUAL ATTACHMENT B
APPROXIMATE LIMITS OF LANDSLIDE BORING 1

SCENIC ROAD
SCENIC ROAD EDGE OF PAVEMENT 402 SCENIC ROAD 365 SCENIC ROAD 378 SCENIC ROAD 377 SCENIC ROAD PROPERTY BOUNDARY, TYP TOWN

RIGHT-OF-WAY
TOWN
RIGHT-OF-WAY POWER POLE & OVERHEAD LINES SANITARY SEWER MANHOLE WATER LINE, TYP FIRE HYDRANT WATER VALVES SANITARY SEWER MANHOLE 12 IN OAK TREE, PROTECT IN PLACE (E) STUMP GAS LINE POWER POLE & OVERHEAD LINES RIDGE ROAD EDGE OF PAVEMENT SITE PLAN - EXISTING CONDITIONS (SCALE: 1" = 5'-0") 1 -

NORTH SCALE
0 2.5
5 10 FEET
Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

SITE PLAN - EXISTING CONDITIONS
2 Roadway Stabilization
Scenic Road at Ridge Road
Fairfax, California
201.175
RCA
RCA
SAS
RCA BID SET 2/1/2021 --------- --------- --------- --------- --------- --------- --------- --------- ---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
sS
s -------
------- s 'I'
sS
\
l'l'- ---------
w w
/
\
\
0 \
\
\
-----
-----
-----
-----
sS -------
-----
----- 1,/\
i'l'- ------- sS
sS
-----
M
M
-----
-----
-----
-----
M
-----
-----
-----
-----
,,
--
==
, , c:=
i:z::

U c.a
C c.a
" ::z::
-
8 FT APPROXIMATE LIMITS OF LANDSLIDE BORING 1 EDGE OF PAVEMENT TOWN
RIGHT-OF-WAY POWER POLE & OVERHEAD LINES 12 IN OAK TREE, PROTECT IN PLACE GAS LINE POWER POLE & OVERHEAD LINES PAVE AREA BETWEEN (N) WALL & (E) PAVEMENT CONSTRUCT PAVEMENT WITH SWALE & OUTLET TO V-DITCH REMOVE DEBRIS AS REQUIRED TO RESTORE V-DITCH (N) REINFORCED CONCRETE RETAINING WALL, SEE DETAIL XX ON SHEET XXDASHED LINE SHOWS LIMITS STA 0+00 OF RETAINING WALL FOOTING TW 529.3 BW 527.3STA 0+05 TW 534.6 BW 526.6 STA 0+30 TW 531.6 BW 523.6 STA 0+36.5 TW 525.1 BW 523.1 EDGE OF PAVEMENT PLACE RIP RAP AT 1.5:1 OR FLATTER TO RESTORE SLOPE ABOVE WALL REMOVE (E) STUMP 45° BEND
45° BEND TWE.G. AT CENTER OF WALL STEM TOP OF FOOTING/BW BOTTOM OF TOE BOTTOM OF KEY TOP OF PAVEMENT IN (N) PARKING AREA -A (E) GROUND SURFACE (N) CONCRETE RETAINING WALL, SEE DETAIL 3/SHEET 3 SCENIC AVENUE SCENIC AVENUE TEMPORARY BENCHES AS REQUIURED 1.5 1 12 IN BACKFILL WITH ON-SITE SOIL TO WITHIN 12 IN OF TOP OF WALL COMPACT TO 90% RELATIVE COMP 8 FT PARKING PLACE RIP RAP AT 1.5:1 OR FLATTER TO RESTORE SLOPE ABOVE WALL. COVER RIP RAP WITH 6 IN OF SOIL AND SEED WITH PRE-APPROVED SEED MIX WALL BACKDRAIN CONSTRUCT PAVEMENT WITH SWALE & CONNECT TO V-DITCH PLACE MIRAFI 180N SEPARATION FABRIC (OR APPROVED EQUAL) PRIOR TO RIP RAP PLACEMENT NO 6 AT 12 IN NO 4 AT 12 IN HORIZ BARS, NO 4 AT 8 IN VERTICAL BARS, NO 6 AT 12 IN 2 IN WEEPHOLES SPACED AT 6 FT 12-IN-WIDE DRAIN CONSISTING OF CLASS 2 PERMEABLE MATERIAL OR CLASS 1 PERMEABLE MATERIAL WRAPPED IN MIRAFI 140 N OR APPROVED EQUAL 3'-6" 1'-0" 1'-0" 2'-6"
MAX
8'-0" BWTW 1'-0" 1'-0" BACKFILL WITH ON-SITE SOIL TO WITHIN 12 IN OF TOP OF WALL COMPACT TO 90% RELATIVE COMP PLACE RIP RAP AT 1.5:1 OR FLATTER TO RESTORE SLOPE ABOVE WALL. COVER RIP RAP WITH 6 IN OF SOIL AND SEED WITH PRE-APPROVED SEED MIX PAVE AREA BETWEEN (N) WALL & (E) PAVEMENT DETAIL 4, SHEET 3 PLACE MIRAFI 180N SEPARATION FABRIC (OR APPROVED EQUAL) PRIOR TO RIP RAP PLACEMENT Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

RETAINING WALL PLAN & DETAILS
3 Roadway Stabilization
Scenic Road at Ridge Road
Fairfax, California
201.175
RCA
RCA
SAS
RCA BID SET RETAINING WALL PROFILE (SCALE: 1" = 5'-0")
2 - STATION

ELEVATION (FEET)

NORTH SCALE
0 2.5
5 10 FEET RETAINING WALL PLAN (SCALE: 1" = 5'-0") 1
- STATION
ELEVATION (FEET) RETAINING WALL SECTION (SCALE: 1" = 5'-0") A
- RETAINING WALL DETAIL (SCALE: 1" = 5'-0")
3 -
2/1/2021 PAVEMENT AT PARKING (SCALE: 1" = 5'-0")
4 - ASPHALT CLASS 2 AGGREGAGE BASE SUBGRADE 2 IN 4 IN NOTES: (1) SUBGRADE AND AGGREGATE BASE MATERIALS SHALL BE COMPACTED TO AT LEAST 95% RELATIVE COMPACTION USING A MAXIMUM DRY DENSITY BASED ON ASTM D1557. SCARIFY UPPER 8 IN OF SUBGRADE AND MOISTURE CONDITION TO NEAR OPTIMUM MOISTURE CONTENT PRIOR TO COMPACTION. (2) ASPHALT SHALL BE COMPACTED TO AT LEAST 95% RELATIVE COMPACTION USING A MAXIMUM DENSITY BASED ON CALTRANS TEST 308. t,/'I \. 540 515 o+ o I 0+10 8 t,/'I -------
8 o+ o o+Jo 0+40 0+42
OH -----i
540 515
------
ss
------
sS
8 .. >~ .. -,: . "t
,."':.;;·.,...'-r-,c--"' --'--; •.!..~-;·,t_c=c...=-1~--}.,:_.:_. ::,7 r-1r•..1 _. .. ,. -·
f ... ,.
.. l;
t ,,. .
' .,
550 545 535 525 520 515 I 0+10 0+20
8 __.,,,, : ;·;. -~: ,- .,..:i . .' ·-r.
~,,
0+30
..........
' "'z•~··
,'«<- ,,
8 550 545 540 535 530 525 520 515
0+40 0+50
,,
--
==
, , c:=
i:z::

U c.a
C c.a
" ::z::
-
, , =
,~ _
, ::z::

E
-
e.=
:E:::

Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

BORING LOGS
4 Roadway Stabilization
Scenic Road at Ridge Road
Fairfax, California
201.175
RCA
RCA
SAS
RCA BID SET 2/1/2021MAJOR DIVISIONS <J) - _, a,
- >
0"'
<J) 5,
0 "O
we
z"'
- "O <( C Ct'. "'
(9
w "' <J) 0
Ct'. "' <(
0 0D
<J) "'
_, "' ou
<J) "O
0 w_ ffi
<( ,o Ct'. o'
(9
w ii;
z >
U: o

CLEAN GRAVEL
GRAVEL
with fines

CLEAN SAND
SAND
with fines

SILT AND CLAY
liquid limit <50%

SILT AND CLAY
liquid limit >50%

HIGH LY ORGANIC SOI LS
ROCK
GW
GM
GC
SW
SP
SM
SC
ML
CL
OL
MH
CH OH
PT

DESCRIPTION
Well-graded gravels or gravel-sand mixtures, little or no fines Poorly-graded grav0ls or gravel-sand mixtures, little or no fine s Si lty gravels. gravel-sand-silt mixtures
Clayey gravels. grave l-sand-clay mixtures
Well-graded sands or gravelly sa nds, little or no fines Poorly-graded sands or gravel ly sands, little or no fines Silty sands, sand-silt mixtures
Clayey sands, sand-clay
mixtures
Inorganic silts and very fine sands, rock flour, silty or clayey fine sands or clayey sills w ith slight plasticity
Inorganic days of low to medium plasticity, gravely clays, sandy clays silty clays, lean clays
Organic si lts and organic silt-clays of low plasticity Inorganic silts,
micaceous or diatomaceous fine sands or silts. elastic silts Inorganic days of high plasticity. fat clays
Organic clays of medium to high plasticity
Peat. muck, and other highly organic soils
LI ndifferentiated as to type or composition

KEY TO BORING AND TEST PIT SYMBOLS

CLASSIFICATION
TESTS
Pl LL
SA
HYD
P200
P4
PLAS

TICITY' IN DEX

LIOU ID LIMIT

SIEVE ANALYSIS

HYDROMETE R ANALYSIS
PERCENT PASSING NO. 200 SIEVE
PERCENT PASSING NO. 4 SIEVE
STRENG

TH TESTS
TV
UC

TXCU TXUU

FIELD TORVANE (UN

DRAINED SH EAR)
LABORA

TORY UNCONFINED COMPRESSION

CONSOLIDATED UNDRAINED TRIAXIAL

UNCONSOLIDA

TED UN DRAINED TRIAXIAL
UC, CU , UU = 112 Deviator Stress

SAMPLER DRIVING RESISTANCE

SAM PLER ITPE

I MODIFIED CALIFORNIA
0 STAN

DARD PE

NETRATION TEST

THIN-WALLED/ FIXED PISTON
ffl HANDSAMPLER

ROCKCORE
Modified Ca lifornia and Standard Penetration Test samplers are driven 18 inches with a 140-pound hammer falling 30 inches per blow. Blows for the in itial 6-inch drive seat the sampler. Blows for the final 12-inch drive are recorded onto the logs. Sampler refusa l is defined as 50 blow-s during a 6-inch drive. Examples of blow records are as follows:

X DISTURBED OR

BULK SAMPLE
Test boring and lest pit logs are an interpretation of conditions encountered at the excavation location during tt1e time of expk;,ration . Subsurface rock, soil or water conditions may vary in different locations within the project srte and with the passage of time. Boundaries between differing soil or rock dRxripti<:ms are approxirnote and may indi c:-~--ite a grOOual transition. 504 Re<Jwocci SW
Suite 220
25 sampler driven 12 inches
with 25 blows after
initial 6-inch drive
85/7" sampler driven 7 inches with 85 blows after
in itial 6-inch drive
50/3" sampler driven 3 inches with 50 blows during
in itial 6-inch drive or beginning offinal 12-inch
drive

SOIL CLASSIFICATION CHART MILLER PACIFIC
INGINIIRING GROUP Nova1o, CA 84947 T 415138-2·3444
f 415 I 382"3450
Roadway Stabil ization
378 Scenic Road
Fairfax, California
Dro·•s EiC A-1
AO, LIFORNIA CCRFORAT ION. 2•l19, ALL RIGHTS RESER'/ ED FI LENAME: 20 1:, 75 DL.~11\i· www.m illo,rpac.cm11 Project No. 201.175 I
>-

0..
w :!, 0 _, w
_, 0

0.. co
w :;; :;; w w <( >- E (J) Cf)
0-0
1 5 -
2 3 10-
4 15-
5 BORING 1
EQUIP
MENT: Track-mounted Hydraulic Drill Rig
with 3.0-inch Solid Flight
Auger
DATE: 03/21/19 ELEVATION: 540 - feer
•REFERENCE· Google Earth, 2019
5 .0" As halt Concrete
Clayey Sand
orange to buff-gray, moist. loose to medium dense,
includes abundant sandstone and shale fragments
Sandstone and Shale
Medium orange to buff-gray, fine-gra ined sandstone
interbedded with
medium-to-dark gray shale. Low to
moderate hardness, friable to weak, high to complete
weathering
with sandstone having extensive iron
oxide staining
Same as above
Medium-dark gray, moderate hardness, friable to
moderate strength, moderate to highly weathered
Date: 312912019
-
>-
0 0 u LL >- 0..
- >-
(J) ZI
,:: =, (9
0 >--
_, Ct'. w
co
OS:
6 100
20 107
84/11" 125
100/8.5"
80/11"
NOTES (1 ) UNCORRECTED FIELD BLOW COUNTS
FIGURE
<( <(
§:
- ,;; 0 0
# 0.. >- >-
w- I Cf) <J)
Cl' >- >- w w
=, z (9 >- >- >- w Ct'. z Ct'. Ct'.
(J) >- w w - Z I I
oo Ir- >- >-
:;; 0 (J) (J) 0 0

19.4 475 18.9

8.1 7.7

10.5 Water level encountered during drilling
f Water level measured after drilling (2)

METRIC EQUIVALENT DRY UNIT
WEIGHT kN/m 3= 0 1571 x DRY UNIT WEIGHT (pcf)
{3)

METRIC EQUIVALENT
STRENGTH (kPa) = 0.0479 x STREN
GTH (psf)

MILLER PACIFIC
~ INGINEIHING GIOUP
A CALIFCRNIA CORPOR,',TION, 2019, ALL RIGfiT~ RE O<ERVED FILENAl,'.E: 20!.176BL.d•.-,g
504 Redwood Blvd.

Suite, 220
No'l>l1o. CA 94947
T 4 15 1 3~2<>444
F 415 / 382·3450
w.·,w.millerp.ic:.com
(4) GRAPHIC SYMBOLS ARE ILLUSTRATIVE ONLY

BORING LOG
Roadway Stabilization
378 Scenic Road
Fairfax, Californ ia
Project
No 201 .1 75 Date: 3/2912019
A-3
FIGURE

FRACTURING AND BEDDING
Fracture Classification Spacing Bedding Classification
Crushed less than 3/4 inch Laminated
Intensely fractured 3/4 to 2-1/2 inches Very thinly bedded Closely fractured 2-1/2 to 8 inches Thinly bedded
Moderately fractured 8 to 24 inches Medium bedded
Widely fractured 2 to 6 feet Thickly bedded
Very
widely fractured greater than 6 feet Very thickly bedded

HARDNESS
Low Carved or gouged with a knife
Moderate Easily scratched with a knife, friable
Hard Difficult to scratch, knife scratch leaves dust trace Very hard Rock scratches metal

STRENGTH
Friable Crumbles by rubbing with fingers
Weak
Crumbles under light hammer blows
Moderate Indentations <1/8 inch with moderate blow with pick end of rock hammer Strong
Withstands few heavy hammer blows, yields large fragments Very strong Withstands many heavy hammer blows, yields dust, small fragments

WEATHERING
Complete Minerals decomposed to soil, but fabric and structure preserved High Rock decomposition, thorough discoloration, all fractures are extensively coated with clay, oxides or carbonates
Moderate Fracture surfaces coated with weathering minerals, moderate or localized discoloration Slight A few stained fractures, slight discoloration, no mineral decomposition, no affect on cementation
Fresh Rock unaffected by weathering, no change with depth, rings under hammer impact NOTE: Test boring and test pit logs are an interpretation of conditions encountered at the location and time of exploration. Subsurface rock, soil and water conditions may differ in other locations and with the passage of lime.
504 RedwoooJ Bl~d
MILLER PACIFIC Su~e 220 ROCK CLASSIFICATION CHART
Novato, CA 94947 INGINIIRING GROUP Roadway Stabilization CI 0\\11 EiC A-2 T 415 ,' 382·3444 378 Scenic Road
Cl,"cl....J
f 415 i 382..J450
A CALIFORNIA CORPORATICN, (' 201 9. ALL RJG fiTS RESER I/ED Fairfax, Ca liforn ia FIGURE FILENAME: 201. 175 DL.dwg '"'"""· r11il lo,rp~c.corn Project No 201 .175 Date: 3/2912019 BORING 1
- <( <(
- §: >- >- <( <(
I (CONTINUED) >- ,;; 0 0 >- 0 "' 0.. >- >- 0.. 0 u 0 (J) (J) UJ - w I LL >- 0.. Ct'. >- >- w w 0 - >- >- w _, (J) z>- =, z (9 _, 0 =,I >- w Cl' z Cl' Cl' i a_ co ,:: >-S2 Cf) >- w w 2 2 0 -Z I I ai w <( o-UJ Do I r- >- >- >- _, o,:: E 2 (J) <J) "' 2 0 (J) <J) 0 0 -20- I Shale
-
/ Medium-dark gray, moderate hardness, friable to
moderate strennth.
moderate to hi<1hlv weathered 55 5.7
Bottom of boring at 21 .5-feet
Groundwater measured at 19-feet 10-inches upon
7 - completion
-
25 -
-
8 -
--
9 30-
-
-
10 -
-
35 -
-
11 --
12 40-
¥'. Water level encountered during drilling NOTES (1) UNCORRECTED FIELD BLOW COUNTS '!' Water level measured after drilling (2) METRIC EQUIVALENT DRY UNIT WEIGHT kN/mJ= 0.1571 x DRY UNIT WEIGHT (p:f) (3) METRIC EQUIVALENT STRENGTH (kPa) = 0.0479 x STRENGTH (psf} {4) GRA

PHIC SYMBOLS ARE ILLUS

TRATIVE ONLY
!.:U4 Redwood Stvd I! MILLER PACIFIC Suite 220 BORING LOG INGINIIRING GROUP Novato. CA 94947
Roadway Stabilization Crn.,·n A-4 T 415 1JB2-3444 378 Scenic Road EiC ci,.,.,.., f 415 I 38l -3450 A CALIFO RNIA CORPORA 110)1 , 0 20 1 ~. ALL HIGHl 5 RESERVED Fairfax, Ca liforn ia FIGURE FILENA~1E: 201 \75 BL WI<; w,,w.rn1llerpaG.GOITI Project No 201.175 Dale: 3/2912019 ,,
--
==
, , c:=
i:z::

U c.a
C c.a
" ::z::
-
Designed
Drawn
Checked SHEET
Project No.
504 Redwood Blvd.

EROSION & SEDIMENT CONTROL
5 Roadway Stabilization
Scenic Road at Ridge Road
Fairfax, California
201.175
RCA
RCA
SAS
RCA BID SET 2/1/2021
NS

1. 2.

3. 4.

5. Marin County Stormwater Pollution Prevention Program Minimum Control Measures
For Small Construction Projects
NOTE: REMEMBER THAT STORM DRAINS

AND RUNOFF FLOW OJRECTL V TO

CREEKS, RIVERS AND BAYS UNTREATED
Erosion Controls Sediment Controls
Schedulina 6. Trackina Controls
Preserve Veaetation & Creek Set Backs 7. Fiber Rolls
Soil Cover 8. Silt Fence
Soil Preoaration/ Rouahenina 9. Drain Inlet Protection
Erosion Control Blankets NS Trench Dewaterina
Reveaetation
,J,-
Good Housekeeaina
10 Concrete Washout

11. Stockoile Manaaement

12. Hazardous Material Manaaement

13. Sanitarv Waste Manaaement 14. Eauioment and Vehicle Maintenance

15. Litter and Waste Manaaement
NS=not shown on graphic
Note: Select an effective combination of control measures from each category, Erosion Control, Sediment Control, and Good Housekeeping. Control measures shall be continually implemented and maintained throughout the project until activities are complete, disturbed areas are stabili zed w ith permanent erosion controls, and the local agency has signed off on permits that may have been required for the project. Inspect and maintain the control measures before and after ra in events, and as required by the local agency or state perm it.

More detailed information on the BMPs can be found in the related California Stormwater Quality Association (CASQA) and California Department of Transportation (Caltrans) BMP Factsheets. CASQA factsheets are available by subscription in the California Best Management Practices Handbook Portal: Construction at http://www.casqa.org. Caltrans factsheets are available in the Construction Site BMP Manual March 2003 at http://www.dot.ca.gov/hq/construc/stormwater/manuals.htm.

Visit www.mcstoppp.org for more information on construction site management and Erosion and Sediment Control Plans.

If you require materials in alternative formats, please contact:
415-473-4381 voice/TTY or [email protected] Control Measure General Description
Erosion Control Best Management Practices
N/A Scheduling Plan the project and develop a schedule showing each phase of construction. Schedule construction activities to reduce erosion potential, such as scheduling ground disturbing activities during the summer and phasing projects to minimize the amount of area disturbed. For more info see the following factsheets: CASQA: EC-1; or Ca/trans: SS-1
1 Preserve Preserve existing vegetation to the extent possible, especially along creek buffers. Show creek buffers on Existing maps and identify areas to be preserved in the field with temporary fencing. Check with the local Planning and Vegetation and Public Works Departments for specific creek set back requirements. For more info see the fo/fowing Creek Setbacks factsheets: CASQA: EC-2; or Ca/trans: SS-2. 2 Soil Cover Cover exposed soil with straw mulch and tackifier (or equivalent). For more info see the foflowing factsheets:

CASQA.- EC-3, EC-5, EC-6, EC-7, EC-8, EC-14, EC-16; or Ca/trans: SS-2, SS-4, SS-5, SS-6, SS-7, SS-8. 3 Soil Preparation/ Soil preparation is essential to vegetation establishment and BMP installation. It includes soil testing and Roughening amendments to promote vegetation growth as well as roughening surface soils by mechanical methods (decompacting, scarifying, stair stepping, etc.). For more info see the following factsheets: CASQA: EC-15. 4 Erosion Control Install erosion control blankets (or equivalent) on disturbed sites with 3: 1 slopes or steeper. Use wildlifeBlankets friendly blankets made of biodegradable natural materials. Avoid using blankets made with plastic netting or fixed aperture netting. See: htt12://www.coastal.ca.gov/n12s/\Nildlife-Friendli'. Products.Qdf. For more info see the following factsheets: CASQA: EC-7; or Ca/trans: SS-7. 5 Revegetation Re-vegetate areas of disturbed soil or vegetation as soon as practical For more info see the following factsheets: CASQA: EC-4; or Ca/trans: SS-4.

Sediment Control Best Management Practices
6 Tracking Stabilize site entrance to prevent tracking soil offsite. Inspect streets daily and sweep street as needed.

Controls Require vehicles and workers to use stabilized entrance. Place crushed rock 12-inches deep over a geotextile, using angular rock between 4 and 6-in. Make the entrance as long as can be accommodated on the site, ideally long enough for 2 revolutions of the maximum tire size (16-20 feet long for most light trucks).

Make the entrance wide enough to accommodate the largest vehicle that will access the site, ideally 10 feet wide with sufficient radii for turning in and out of the site. Rumble pads or rumble racks can be used in lieu of or in conjunction with rock entrances. Wheel washes may be needed where space is limited or where the site entrance and sweeping is not effective. For more Info see the following factsheets: CASQA: TC-1; TC-3: or Caftrans: TC-1, TC-3.
7 Fiber Rolls Use fiber rolls as a perimeter control measure, along contours of slopes, and around soil stockpiles. On slopes space rolls 10 to 20 feet apart (using closer spacing on steeper slopes). Install parallel to contour. If more than one roll is used in a row overlap roll do not abut. J-hook end of roll upslope. Install rolls per either Type 1 (stake rolls into shallow trenches) or Type 2 (stake in front and behind roll and lash with rope). Use wildlife-friendly fiber rolls made of biodegradable natural materials. Avoid using fiber rolls made with plastic netting or fixed aperture netting. See: htt12://www.coastal.ca.gov/n12sNVildlife-Friendl!i Products.Qdf.

Manufactured linear sediment control or compost socks can be used in lieu of fiber rolls.

For more info see the following factsheets: CASQA: SE-5 (Type 1); SE-12, SE-13; or Caftrans: SC-5 (Type 1 and Type 2) 8 Silt Fence Use silt fence as a perimeter control measure, and around soil stockpiles. Install silt fence along contours Key silt fence into the soil and stake. Do not use silt fence for concentrated water flows . Install fence at least 3 feet back from the slope to allow for sediment storage. Wire backed fence can be used for extra strength.

Avoid installing silt fence on slopes because they are hard to maintain. Manufactured linear sediment control can be used in lieu of silt fences . For more info see the fo/fowing factsheets: CASQA SE-1; SE-12; or Ca/trans: SC-1.
9 Drain Inlet Use gravel bags, (or similar product) around drain inlets located both onsite and in gutter as a last line of Protection defense. Bags should be made of a woven fabric resistant to photo-degradation filled with 0.5-1-in washed crushed rock . Do not use sand bags or silt fence fabric for drain inlet protection. For more info see the following factsheets: CASQA: SE-10; or. Ca/trans: SC-10.

N/A Trench Follow MCSTOPPP BMPs for trench dewatering. httg:f/www.marincount)'. .org/degts/gw/divisions/mcstoggg/ Dewatering develogmentf-/media/Files/Degartments/PW/mcstoggQ/develogment/TrenchingSWRegMCSTOPPPFinal6 0

9.Qdf. For more info see the fo/fowing factsheets: CASQA: NS-2; or Ca/trans: NS-2.

Good Housekeeping Best Management Practices
10 Concrete Construct a lined concrete washout site away from storm drains, waterbodies, or other drainages. Ideally, Washout place adjacent to stabilized entrance Clean as needed and remove at end of project. For more info see the foflowing factsheets: CASQA: WM-8; or. Ca/trans: WM-8.
11 Stockpile Cover all stockpiles and landscape material and berm properly with fiber rolls or sand bags Keep behind the Management site perimeter control and away from waterbodies. For more info see the following factsheets: CASQA: WM-3 or Ca/trans: WM-3.
12 Hazardous Hazardous materials must be kept in closed containers that are covered and within secondary containment:

Material do not place containers directly on soil. For more info see the following factsheets: CASQA: WM-6_: or Management Ca/trans: WM-6.
13 Sanitary Waste Place portable toilets near stabilized site entrance, behind the curb and away from gutters, storm drain inlets, Management and waterbodies. Tie or stake portable toilets to prevent tipping and equip units with overflow pan/tray (most vendors provide these) For more info see the foflowing facfsheets· CASQA: WM-9_: or Ca/trans: WM-9. 14 Equipment and Prevent equipment fluid leaks onto ground by placing drip pans or plastic tarps under equipment. Immediately Vehicle clean up any spills or drips. For more info see the following factsheets: CASQA: NS-8, NS-9, and NS-10; or Maintenance Ca/trans: NS-8, NS-9, and NS-10.
15 Litter and Waste Designate waste collection areas on site. Use watertight dumpsters and trash cans: inspect for leaks. Cover Management at the end of each work day and when it is raining or windy. Arrange for regular waste collection Pick up site litter daily. For more info see the fo/fowing factsheets: CASQA: WM-5; or Ca/trans: WM-5.

Noles

1. ls.l;ils/hlanl<r.L"> ~Mould hr. insla'lcd
vcrtica l:y dovmslopc

2. S1aple blankels sufficiently lo
.:e 11 sum 11ml maleri;il ,,..; 11
m.'linlflin dire cl c: onlflr:I •...-ilh soil
6L1a0mrr:,
1_ ~,-
n 1 i" (JU~mrri 11 (40rrml __1
~;:: _J,._
STAPLES Erosion Blanket
,. NonW~1,-.,n
geotextile Filter
fabric under
t~·pical treatm ent.

Wet Slope Lining
Not To Scale
Note: Actua l layout determined In the field.

Diversion ridge required
where g rade exceOOs 2% ~• Gr•""''
==~
Strew wattles
along contour
Supply Wa ler lo Wash ,
W heels if N,.:-_c,:iss.flry
3-4••
Cru9hed
rock
Diversion ridge and 12• min~
straw wattle depth
20ft min for light trucks or as long as can frt on site Plan Notes:
7 10H
_j
1 The entrance shall be maintained to prevenl sediment lracking or flowing onto publ ic rlght-of-w~ys. T11 1s may require top dressing, repair and/or cleanout or other measures that trap sediment

2. When necessary, wheels shall be cleaned prior to entering public right-of-way

3. When washing is required, it shall be done on an area slabilized with crushed stone that drains into an apprO'.red sediment trap or 3ediment basin Rumb le plale3 or tire wash can be added Site Entrance
Extra strength filter fabric needed
# ithc., LJt 'Nire mesh ~upport
Steel or
Attach filte r fabric
10' (3m) maximum spacing
with wire support fence
SLOPE
6' (1.8m) maximum spacing
without
wire support fence Scee I or wood i:ost
36"" (1m) M.-ix height
~n.ii~ ~e§l~I
Notes:

Silt fence shall be placed level a!ong
slope cont:,urs tc maximize ponding
efficie ncy with the ends cu rved uphi ll to
improve flbility to rem in vmter.

2. Inspect and repair fence after e&h storm
event and remove sediment when
accurnula1ion reaches 1/3 of the
barrier height

3. Roe-moved sediment shall be depostted lo
an area thal will not contribute sed ime11t
off-site c1nd cc1n 00 permanently sbbil~d
Silt Fence

NOTTO SCALE
Trench Detail
Saad bag
4"xfi'
(10 0-150mm)
Trer"K::11 with
r.nmpacted
backfi ll
Benn\
Straw bales Plcistic
'Ncod frame securely Binding wires~ini ng
fastened around entIra Native matE!!"lal
perimeter (optional)
A
Latp & flagging
on three sldss -1/aries -
"' A A A V V V [/
V aries
y V y
Pl3n
Tiee ~Below Orade"
Not to scale
Note: Actual la~·out determined in f"1ld
··~ Rough
hemlock
fir frame
Straw
bale
Sal"ld bag
B
Plan
Type "Above Grade"
Not lo srnle
Concrete Washout
Wire Screen
--- Drop ln~t
with Grat!!
'---Filltered Warnr
Grnvel Bags
~Varies
,,
--
==
, , c:=
i:z::

U c.a
C c.a
" ::z::
-

Fairfax City CouncilAugust 3, 2022

Fairfax City Council
August 3, 2022