HomeMy WebLinkAboutDrainage Report for COM2004-00139 - PLN General - 6/30/2004 EROSION CONTROL REPORT
Construction Sequence and Procedure
Best Management Practices shall be implemented before, during and after the construction
period. Filter fabric for temporary erosion control (see appendix B for standard erosion control
detail, notes and plans) shall be placed around area that drains off site, during the construction
period. Areas to be hydro seeded will be in accordance with Washington State Standard
Specification for Road, Bridge, and Municipal Construction, Division 8, Section 8-01 Erosion
Control. Manholes and catch basin grates shall be protect to prevent silt from entering
stormwater facility.
Best Management Practices (BMP's) will be employed before any construction begins on-site.
The planned construction sequence is as follows:
8. Install filter fabric fencing, where appropriate.
9. Install construction entrance.
10. Clear site (clearing and grubbing).
11. Install underground utilities (telephone, water, sewers, ect.).
12. Complete earthwork and stormwater facilities.
13. After paving has been completed landscape, sod and/or grass seed, and mulch all
disturbed areas.
14. No equipment or trucks are to be washed onsite.
Inspection Sequence
The Project Engineer shall inspect the facilities related to stormwater treatment, erosion control,
storage and conveyance during construction. At a minimum, the following items shall be
inspected at the time specified:
1. The erosion control facilities shall be inspected before the start of clearing and
grubbing to ensure the following are in working order:
A. Filter Fabric Fences
B. Construction Entrance
2. The conveyance systems will be inspected after construction of the facility, but before
the project is completed to ensure the following are in working order:
A. Road Drainage Conveyance System
3. The permanent site restoration measures should be inspected after landscaping is
completed.
A final inspection shall be performed to verify final grades, slopes and all necessary information
to complete Engineer's Construction Inspection Report Form and Agreement to maintain
stormwater facilities. These forms must be completed prior to final public works construction
approval.
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ATTACHMENT"A"(CONTINUED)
Maintenance Checklist for Grounds[landscaping]
FreNueocv Rfafonge Svstow ,I Mblew CoditNos is Check For CandiWus That Shepid Lust
Festers v
M General ine Weeds vrorring IN more than 20%of the laudsaped Weeds present IN less than 5%of Ike
(eogNlsaeNsl am(trees NO shrubs anh). landscaped area.
M SOW hazard Any presence of Porte ov or other polsowos Re PshoNws""failed of insect owls
Matsu"or Insect Nesm present IN laadsaped area
M.S Trad er Etter Su hods CkechRst See Pods Checklist
M.S EresiNN of Grind Noticeable rifts are seem In landscaped areas. Cases of erosion are Identified and steps
Sorbs taken to slow dew/spread Not the crater.
Eroded areas are filled,aetsorok ad seeded.
A Trees and shrabs )mane limbs or parts of trees or shrubs that are spill or Trim trees/shrubs to restore ships.Replace
broken which affect more than 25%of the total trees/shrobs with severe daRrapa
to o"of the tree or shfaa
M Trees K skinks that ban been blow dorm er Repbot tree.Inspecting for later))to stew or
backed over. fasts.Replace N smmly dawapei
A Trees er shrubs which are not adeamateh Mace stakes Rod robber-canted ties stun/
SRNMIid er aro IsSRing Mr.awing ebosare of Tang trowshrobs for sapport.
the ruts.
it Yon no ensure whether a problem eatsts,please contact the lartsdietles and ask fer tOCIRRlal assfsbRce.
Cowatents:
Key
A=Annual(March or April arelsrmig -
N=Menthiv(see schedule)
S=After malor storms
Paize K- 27
I
ATTACHMENT"A"[CONTINUED)
Maintenance Checklist for Fencine/Shrubbery Screen/Other landscaping
Frequency Dralmage System � Prablem Conditlems to Check For Conditions That Should Exist
Feature
M 6euenl mcd"or broken Any defect in the fence or screen that permits easy Fence Is mended or shrubs replaced to form a
part imm am"to a facility. solid barrier to entry.
skamwm v
M.S Erman Erosion has resulted in an opening under a tan Replace soil under fence son that me opening
that allows entry by people or pets exceeds 4 inches in height
M Bard uoetauon Shrubbery is growing out of control m is IafostM Shrubbery is trimmed and weeded is provide
with weeds appealing aesthetics.go not use chemicals to
antral weeds.
B Wire Fences Ims" d parts Posts out of plumb more than 6Inches, Posts plumb to within iK Inches of plumb.
B Top rails beat more Alan 6 focbe& Top rag bee of bends greater than 1 Inch.
B Any part of fence Dacluding posts,top rags,and Fence Is aligned and meets design standards.
fabric]more than 1 fat out of design alloommot.
B Missing or loose teasioo wire. Tension wire In place and holding fabric
B Missing or loom barbed wire that Is soulful more Barbed wire In place with less than 3/4-Ink
than 2'%Inches between posts. sag between posts.
B Extension arm mtWot broken.mr beat mot of sban Extension arm Ise place with as hoods larger
more than 1%Inches. tham 3/4loch
B Boamlersted palmt Pan n parts that lute a nsuug n snllq p an Structurally attenuate posts or parts with a
W uraUCtlae Mat has affected structural adequacy. uniform pntectfre ends&
calm
M Opwtaus In fabric Openings in fabric are such that an 8-lack-meter No openings in fabric.
ball could fit through
lt yen are ensure whether a problem exists,please contact the lortsilcuon and ask for technical assistance.
Cemmeats:
Key
B=Banal Qlortb or Awl tweterred]
M=11""Isn scindol
S=BRer MAW stoars
Pate K- 24
ATTACHMENT"A"[CONTINUED]
Maintenance Checklist for Infiltration Systems
Fratungcy Drainage System Praklom Conditions to Check For Conditions That Should Exist
Feature
M.s General Trask a OW% See Maintenance Checklist ter Ponds. See Maintenance Checklist for Ponds,
boa"Is Pend
M Pals000as See Maintenance Checklist for Ponds. See Maintenance Checklist for Ponds.
yoleraMom
M,S Fira Huard or See Maintenance Checklist far PoRd& See Maintenance Checklist for Ponds.
memo=
M gagaraH not See Maintenance Checklist for Foods. See Matoteuance Checklist for Ponds,
graver!or is
ourgrwm
N Redngt boles See Maintenance Checklist for Pond& See Maintenance Checklist for Ponds.
M 1— See Maintenance Checklist for Ponds- Sae Malnlenauce Checklist ter Ponds.
A Storage area Sesim"band" A soil texture test Indicates facility Is pot working at Sediment Is removed and/or facAlty Is Claaod
to system its designed apabflttles or was incorrectly so that Infiltrating system worts Recordist to
designed. design.A sediment trapping area is Instaibd
to rodnee sediment transport Into IpTAtratlen
are&
A Storage area drains A sell texture test indicates facility is Rot working at Addftlaal volume is added through excavation
sled.Imoro than its designed capabilities or was Incorrectly to Pravda Needed storage.Soil is aerated and
48 bomsl or designed. rotetgled to Improve drainage,Contact the City
man ter Mermatle coo its reoulremeats regarding
excavation.
M Sadhent trapping Any sediment and debris filling area to 10%91 depth Clean oat sump to design depth.
are from sump bottom to bottom of outlet pipe or
obstructing now IRIa the Connector pipe.
One Time Semmes trapping Storunrater enters infiltration area directly wtti»nt Add a trapplU area Iry courstructlng a samp for
arsangtpresent treatment. settimgda — Segregate settling area from
rest If Im Ally.Contact City for guidance,
M Rock Afters Sed on"aed By Mswl Inspection time or me water hers"womb Replaco grovel In rock filter.
debris filler daring hem refs starers.
if in are snore whether a Problem exIM please contact IN Inrtsdicti n and ask for teckmkal assistance.
Comments:
[OY
A=An" of April QeleffeC
M=MnlWv tsm sehadmlel
S=After WAW storms
Page K - 22
ATTACHMENT"A"[CONTINUED)
Maintenance Checklist for Ponds
Frequescv gnlBase Syslew J MNew Conditions to Check For CondiJens Thai Should Exist
Ftst rs
M.S General Trash a debris Bumping of yard wastes such as grass clippings Remove trash and debris and dispose as
hallo In pond. and branches Into basin.Unsightly accumulatlea e1 prescribed by City Waste Management Se6961.
non-degradable materials such as glass,plastic,
metal,feam,and coated paper.
KS Trask rack plop led Bar screen over outlet more than 25%covered by Replace screen.Remove trash and debris fed
m Missile debris or missing. dispose as prescribed by City Waste
Management Section-
IN Potseaws Any poisonous vegetation which may constitute a Remove poisonous vegetation.Bo not spray
yegetatlea hazard to the public.Examples of poisonous chemicals on vegetation without obtaining
vegelallen include:tansy ragwort poison oak guidance from the Cooperative Extension
stinging nettles,devilsclub. Service and approval from the City.
KS Fire karard of Presence of chemicals such as natural gas.sit and Find sources of pollution and eliminate Ment
pellslfn gasoline,obnoxious color,odor,or sludge nsted. Water Is tree from noticeable color.odor,of
centamifatlsn.
M Veneta)"list For grassy ponds,grass cover Is sparse and weedy For grassy ponds,selectively thatcft aerate.
!fowl!K is at is overgrown.For wetland pond&plants are and reseed pond&Grass cutting unnecessary
everwm sparse or Invasive species are present unless dictated by aesthetic&For wetland
ponds,hand-plant nursery-grown wetland
Plants fa hare area&Caslact the Cooperative
Extension Service for direction on Invasive
Species such as purple lessestrtfe and reed
canary grass.Pond bettems should have
uniterm dense coverage ei desired plant
species,
M Redewt boss Any evidence of rodent holes If facility Is acting as a Rodents desireyed eat dam or berm repalret
dam or berm.or any evideace of water plplug Cestact the Thurston Comply Health
through dam or berm via rodent holes. Bepartarent for guidance.
M Insects When insects such as wasps and hornets interfere Insects destroyed or removed from site.
with maintenance activities,of when mosgaitons Contact Cooperative Extension Service[of
become a nuisance. guldasc&
A Tres growth Tree growth does not allow maintenance or v or Trees do not hinder maintenance activities.
Interferes with maintenance activity(Le-slope Selectively cuttivate tees such as alders for
mowing,sift removal,or equipment movements).If firewoot
trees are not Interfering with access.leave trees
alone.
M Side slopes of Erosion is kerms or Check around Islets and outlets far signs of ensues. Red cases of erosion sod eliminate then
paid at exv=ce/exit Check berms for signs of sliding of settling.Action Then sloses should be stabilized by using
Is needed where eroded damage over 2Inches deep approonale efesles central measure(:);&C
and where Were is potential tar continued erosion. rock reinforcement planting of grass,
compaction.
M $tange area Sedkaest hafidss In Accumulated sediment that exceeds 10%at the Sediment cleaned out is destined pond shape
Pond designed pond depth.Burled or partially buried and desdt:pond reseeded it oecessary to
outlet structure pfobabty indicates significant control erosion.
sediment deposits.
A Pad dikes Settlements Any part of dike which has settled 4 inches low Dike should be built back to the design
lima the desigo eieratIlL elevatles.
A EM Mpesev leek Mlsslsg Doty see layer of rock exists above uthfe solo in Replace rocks to design standard&
saarflow/ area 5 square toot of larger,if ssv exposure of
sselrag "five soft
M Thm Emorgism overflow alissing Side at pond has as area with large nets to karts Contact City ter guidance,
evorliew/ emergewv overflows,
ssillwav
11 yes are--earn whotbf a prsom etdst&pease contact the WrtWctlon sod ask for technical asslsus e.
cosTmom-
Kay A�Aaawal Harsh K And profsrroo
M-NWGMV[son schadalol
3-After NOW stsr�s
ATTACHMENT"A":MAINTENANCE PROGRAM
COVER SHEET
Inspection Period:
Number of Sheets Attached:
Date Inspected:
Name of Inspector:
Inspector's Signature
Pate K- 17
INSTRUCTIONS
The following pages contain maintenance needs for most of the components that are part of your
drainage system, as well as for some components that you may not have. Let us know if there are
any components that are missing from these pages. Ignore the requirements that do not apply to
your system. You should plan to complete a checklist for all system components on the following
schedule:
(1) Monthly from November through April.
(2) Once in late summer(preferably September).
(3) After any major storm (use 1-inch in 24 hours as a guideline), items marked "S" only.
Using photocopies of these pages, check off the problems you looked for each time you did an
inspection. Add comments on problems found and actions taken. Keep these "checked" sheets in
your files, as they will be used to write your annual report(due in May). Some items do not need
to be looked at every time an inspection is done. Use the suggested frequency at the left of each
item as a guideline for your inspection.
You may call the jurisdiction for technical assistance. Please do not hesitate to call, especially if
you are unsure whether a situation you have discovered may be a problem.
Page K- 16
MAINTENANCE PLAN
Required Maintenance
The following pages contain maintenance needs for most of the components that are part of your
drainage system, as well as for some components that you may not have. Let us know if there
are any components that are missing from these pages. Ignore the requirements that do not apply
to your system. You should plan to complete a checklist for all system components on the
following schedule:
1. Monthly from November through April.
2. Once in the late summer (preferably September).
3. After any major storm(use 1" in 24 hours as a guideline) items marked "S" only.
Using photocopies of these pages, check off the problems you looked for each time you did an
inspection. Add comments on problems found and actions taken. Keep these "Checked" sheets
in your files, as they will be used to write your annual report (due in May). Some items do not
need to be looked at every time an inspection is done. Use the suggest frequency at the left of
each item as a guideline for your inspection.
You may call the jurisdiction for technical assistance. Please do not hesitate to call, especially if
you are unsure whether a situation you have discovered may be a problem. _
Responsible Organization
The owner's or owner's representative shall be responsible for the operation and maintenance of
all onsite drainage facilities.
Vegetation Management Plan
All disturbed pervious areas within the site will be landscaped to provide an aesthetically
pleasing environment.
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I'IUM(:F 1:4)11NTY 1t ITS AP COUN'1'1
�- Z
PENDIX IV
AP �
PROJECT MAPS l
for Coarse) P=Prominent F=Fine
M=Medium
C=Coarse
Third letter group represents the
shape of the structural unit
SAB=subangular blocky
AB=angular blocky
G=granular
PI=platy
Stream Type=stream type:as defined in WAC 222-16-030,Water Typing System. These aping were established in cooperation
between the Dept.of Natural Resources,the Dept.of Fisheries,the Dept.of Wildlife,the Dept.of Ecology,
and in consultation with affected Indian tribes. The results are available across the counter at DNR Map and
Photo Sales. The current stream type definitions are as follows (paraphrased from the WAC code
descriptions):
Stream Type Typical characteristics
1 All shorelines of the state,as defined under RCW 90.58,within their ordinary high water mark,excepting their
associated wetlands. Generally, these include all rivers, lakes greater than 20 acres, and perennial streams
downstream of the point of greater than 20 cfs flow. These are generally considered to be fish-bearing waters.
2 These are not Type 1 waters,but do have high fish,wildlife,or human use values. They include segments of
natural waters and their associated wetlands which:
(a)are diverted for domestic use by more than 100 residential or camping units...;
(b)are within any campground with greater than 30 camping units..;
(c)are used by substantial numbers of anadromous or resident game fish for spawning,rearing or migration,
such as those having a defined channel width of 20 feet or greater and a gradient of less than 40/6,or lakes,
ponds or impoundments with greater than 1 acre of surface area at seasonal low water.
(d)are used by salmonid for off-channel habitat,usually critical for juvenile survival,such as those areas
connected to a shnonid bearing stream and accessible at some time of the year and having an access
drainage area with less than 5%gradient.
3 These are not Type 1 or 2 waters,but have moderate to slight fish,wildlife,or human use values. They include
segments of natural waters and their associated wetlands which:
(a)are diverted for domestic use by more than 10 residential or camping units...;
(b)are used by significant numbers of anadromous fish for spawning,rearing or migration,such as those
having a defined channel width of 5 feet or greater and a gradient of less than 121/o and not upstream of a
falls of more than 10 vertical feet.
(c)are used by significant numbers of resident game fish,such as those having a defined channel width of
10 feet or greater,a summer low flow of greater than 0.3CFS, and a gradient of less than 120/6,and ponds
or impoundments with greater than 0.5 acre of surface area at seasonal low water.
(d)are highly significant for protection ofdownstream water quality.such as tributaries that contribute more
than 20%of the flow to a Type 1 or 2 water...
4 These are not Type 1,2,or 3 waters,but are considered important for protection of downstream water quality.
These are not fish-bearing streams, but have a defined channel and are either intermittent drainages. or are
perennial streams in unreachable portions of a drainage. These waters continue upstream until the channel
becomes less than 2 feet wide.
5 These are not Type 1,2, 3, or 4 waters,but include streams with or without well-defined channels,areas of
perennial or intermittent seepage,ponds,natural sinks and drainageways having short periods of spring or storm
run off.
-111-
APPENDIX III
DEFINITIONS
Column Headings:
Horiz=horizon: This word refers to the horizontal bands of soil that form at various depths from the surface as a result of either
accumulation of organic materials or leaching of clays and salts by water. "A"horizons generally have an accumulation of
organic materials. "B" horizons generally have an accumulation of clays or salts_ "C" horizons are generally either
undifferentiated parent material or are below the zone of major biological activity. A small letter following the capital letter
provides additional information. "Bw"describes a"cambic"or barely developed B horizon;A"cw","cs"or"ci"after a B or
C describes a horizon with weak cementation,strong cementation,and induration respectively. An"r"after a B or C indicates
that the horizon is dominated by saprolyte,which is rotten rock—i.e.rock that is so decomposed that it is almost soil. An"R"
after a C indicates that the C horizon is predominantly hard, undecomposed bedrock A"2" in front of a B or C horizon
indicates that the subsoils have a different parent material than the overlying soils.
Dpth=depth:gives the distance from the surface for the top and bottom of each horizon.
Col =color: gives a Munsell Book color chip code. The Munsell color codes(example:I OYR 3/4)give information on the hue
(10YR),value(3),and chroma(4)of the soil. Soil color can be used to infer parent material,percent organic content,or soil
drainage characteristics. For example.soils with both low chroma and value(example: 1 OYR 2/2)are very dark-colored and
tend to have high organic matter contents;soils with a Munsell chroma code of 2 or less(example: 1 OYR 7/2)may be poorly
drained.
The following value/chrome color codes correspond to the following soil color names for the two most commonly used HUE
pages 10YR and 2.5Y:
IOYR HUE 2.5Y HUE
COLOR NAME VALUE/CHROMA COLOR NAME VALUE/CHROMA
white 8/1,82 white N8/,8/2
light gray 7/1,72 light gray NT,7/2
gray 6/1,5/1 gray - N6/,N5/
dark gray 4/1 dark gray N4/
very dark gray 3/1 very dark gray N3/
black 2/1 black N2/
very pale brown 8/3,8/4,7/3,7/4 pale yellow 8/4,7/4
light brownish gray 6/2 light brownish gray 6/2
grayish brown 52 grayish brown 5/2
dark grayish brown 4/2 dark grayish brown 4/2
very dark grayish brown 3/2 very dark grayish brown 3/2
very dark brown 2/2 light brownish gray 6/2
yellow 8/6,8/8,7/6,7/8 grayish brown 5/2
pale brown 6/3 dark grayish brown 4/2
brown 5/3 very dark grayish brown 32
dark brown 4/3,3/3 pale yellow 8/4,7/4
light yellowish brown 5/4 light yellowish brown 6/4
brownish yellow 6/6,6/8 light olive brown 5/4,5/6
yellowish brown 5/4,5/6,5/8 olive brown 4/4
dark yellowish brown 4/4,4/6,3/4,3/6 yellow 8/6,8/8,7/6,7/8
olive vellow 6/6,6/8
Txt=texture:describes the relative dominance in size of soil particles smaller than 2 min diameter. Sand,silt,and clay are the three
size classes with sand being largest and clay being smallest. The textural names are applied based on the weight percentage of
sand(S),silt(Si),and clay(C). The field estimate of percent sand,silt and clay are given with the textural name.
CF=percent coarse fragments. Coarse fragments are defined as any mineral fragment in the soil greater than 2mm diameter. if
needed,coarse fragments are also described in terms of various size classes—gravel,cobble,stone,etc.Abbreviations associated
with CF percentages will be:Co=cobbly(coarse fragments>3"diameter),Cn=concretions(small,round pebble-like fragments
formed by soil minerals dissolving and then re-precipitating). If no abbreviation is included, assume that the percent CF is
describing gravels(coarse fragments>2mm and<3"in diameter).
-1-
APPENDIX III
DEFINITIONS
APPENDIX II
Saxon silt loam,5 to 15 percent slopes (Sa).—This soil occurs on rolling or gently rolling benches
near Belfair. The surface soil is friable and moderately granular, brown silt loam, 8 to 10 inches thick. It is
slightly acid and contains many roots and very little shot. This is underlain by a pale-brown, friable silt
loam, which at depths between 15 to 20 inches grades to a friable to firm silt loam subsoil having a weak,
subangular blocky structure. Yellowish-brown stains occur along root channels. Below a depth of 30
inches, the subsoil grades to slightly compacted, stratified, and platy fine sand and silt, which continue to
depths of several more feet. The slight compaction in this material does not restrict movement of moisture
or growth of roots.
The soil is deep, friable and permeable; it has a good capacity to hold available moisture.
APPENDIX H
SOEL SERIES DESCRIPTIONS
APPENDIX I
Pit#1
Horiz Dpth Col CF Txt Struc Perc Tyne Mott Roots OM %C
A 0-4 5YR3/3 - Sil SG 0.6-2 - - MC 5 <10
Cl 4-15 10YR6/2 - Sil SG 0.6-2 - - FF <3 <10
C2 15-56 7.5YR3/4- Sil SG 0.6-2 - - - - <10
C3 56-84 10YR6/2 - Sil SG 0.6-2 - C2d - - <10
Saxon soil series. Cl is dry. C2, C3, was moist. Went down past 7-feet and did not hit an impermeable
layer.
Pit#2
Horiz Dnth Col CF Txt Struc Perc Tune Mott Roots OM %C
A 0-9 10YR3/3 - Sil SG 0.6-2 - - FF 5 <10
Cl 9-31 10YR5/3 - Sil SG 0.6-2 - Flf FF - <10
C2 31-42 10YR5/3 - Sil SG 0.6-2 - Fld - - <10
C3 42-60 2.5YR3/2 - Sil SG 0.6-2 - - - - <10
C4 60-90 10YR5/3 - Sil SG 0.6-2 - M3P - - <10
Saxon soil series. Cl, C2, is dry. C3, C4 was moist. C1, C2, looked more like a transition soil or actually
wo colors. Went down past 7 1/2-feet and did not hit an impermeable layer.
APPENDIX I
SOIL PROFILE DESCRIPTIONS
1
any infiltration surface if mismanaged during or after construction. For this reason I am
recommending a design rate of 2-inches per hour. Realize that these layers have the potential to
infiltrate at higher rates, ignoring all other factors.
The facility will probably need to have a safe surface release for large rainfall events that occur
late in the rainy season.
Contours and Concepts Engineering, LLC.
Results and Discussion
Site Description
The project site, which is approximately one acre in size, is located on the northwest corner of
Old Belfair Road and the Davis Farm Road intersection, in Belfair, Washington (see vicinity
map, Appendix IV). The existing site is pastureland, fenced on all four sides. The preliminary
site layout map provided by the client show the proposed commercial development on the north
half of the property and the south portion as a potential location for the stormwater facility.
The overall site relief is flat with approximately 6 to 8-feet in height difference. The nearest
large body of water is Hood Canal, which does not affect the site hydrology.
Mapped Soils Description
According to the Mason County Soil Survey, the following soil series is mapped on the site:
Saxon silt loam, 5 to 15 percent slopes. This soil occurs on rolling or gently rolling benches near
Belfair. The Saxon silt loam is a single grain material that does not restrict movement of
moisture or growth of roots.
Please refer to the individual pit descriptions in Appendix I and to the discussion in the text
below for specifics on observed site soil conditions.
Onsite Soil Descriptions
Two soil pits were excavated onsite. Both pits were located on the southeast portion of the
property near Old Belfair Road, which was the lowest point on the site. The preliminary site
layout map provided by the client indicates this area as potential locations for stormwater
facilities. It should be noted that the client has indicated that this area does pond during the
heavy 100-year storm but does not receive enough water to flow through an existing culvert that
runs under Old Belfair Road and that the stormwater infiltrates with 24 hours.
Both pits#1 and 2 have native soil profiles between 4 to 9-inches of brown sandy silt loam at the
surface (A horizon) with no sign of disturbance. Below the A horizon in pit#1 the subsoil was a
pale light brown silt loam with no presence of mottling to show seasonal saturation. At a depth
of approximately 56-inches to as far as could be excavated within the pit, over 7-feet, mottling
was common and distinct but showed no signs of an impermeable layer or cemented glacial till.
Below the A horizon in pit#2 the subsoil was a pale light brown silt loam with indications of
mottling or a transition soils with two colors down to approximately 48-inches. At this point,
from 48 to 60-inches, the mottling disappeared leading to the suggestion that above soils was
more of a transition soils versus a soil with mottling. From 60-inches to the bottom of the pit,
approximately 7 1/2-feet, mottling was many and prominent indicating that seasonal flow could
be passing through this area during winter months. An impermeable layer or cemented glacial
till was not encountered within either pit#1 or 2.
The soil in this area is suitable for infiltration, but with design limitations. Both pits do not have
impermeable substrates but they do have fine-textured some what slow drained soils. Mottling
did occur at around 56 to 60-inches below the surface strata. However, with the absence of an
impermeable layer and the 3-4 foot thick layer of single-grained soil that can be used to accept
water, at a very limited design rate is recommended. Fine textured soils have a potential to seal
o urs& Mailing Address: P.O. Box 476 Tenino WA 98589
o epts Physical Address: 4405 - 7th Ave. S.E. Suite 300 Lacey, WA
_ngineering Phone Number: 360-438-0301
E-Mail: Bill@CandCengineering.com
Clinton and Kelly Shumaker
60 NE Davis Farm Road
Belfair, WA
June 10`h, 2004
Report Number: 062004
Report Subject: Soils investigation for stormwater facility design.
Location: The study site is located on the parcel between Mr. and Mrs.
Shumakers' home and Old Belfair Road. Tax Parcel# 12329-12-
90081
Introduction
An onsite soils investigation was performed on June 8, 2004, by C & C Engineering. The
intent of the work was to identify and characterize on-site soil conditions and how they
would affect stormwater facility design. The purpose of this document is to report the
results of those investigations.
Methods and Materials
Office Research
The Mason County Soils Survey was consulted to determine how local soils are mapped
and to determine if some areas might be better suited than others for onsite stormwater
infiltration. Because of the relative size of this site only one type of soil is mapped in this
area.
Field Research
On June 8, two soils pits were excavated to a depth of 7 '/2-feet on-site (See site map,
Appendix IV).
The soils profiles were analyzed in each pit with emphasis on soil structure, texture,
mottling, and percent clay content. Soil pits were also evaluated for any sign of a long-
term or seasonal water table. Information obtained from the soil profile descriptions was
also used to predict potential soil percolation or infiltration rates.
Appendix B
Soils Report
Sheet Down to the Basin 110.00 ft 1.00% 0.1700 19.04 min
Impervious TC Data:
Flow type: Description: Length: Slope: Coeff: Travel Time
Sheet Across Parking Area 102.00 it 0.50% 0.0110 2.65 min
HYDLIST SUMMARY
[2yr-out] [100yr-out]
LSTEND
HydID Peak Q Peak T Peak Vol Cont Area
------- (cfs) (hrs) (ac-ft) (ac)
2yr-out 0.12 8.67 0.0961 1.0000
100yr-out 0.17 15.67 0.3718 1.0000
STORLIST
[Pond]
LSTEND
Node ID: Pond
Desc: Infiltration Pond
Start El: 100.0000 ft Max El: 103.0000 ft
Contrib Basin: Contrib Hyd:
Length ss1 ss2 Width ss3 ss4
50.0000 ft 3.00h:1 v 3.00h:1 v 50.0000 ft 3.00h:1 v 3.00h:1 v
DISCHLIST
[D-001]
LSTEND
Control Structure ID: D-001 - Infiltration control structure
Descrip: Infiltration Pond
Start El Max El Increment
100.0000 ft 103.0000 ft 0.10
Infil: 2.00 in/hr Multiplier: 1.00
[2 yr] 2.00 in
[5 yr] 3.10 in
[10 yr] 3.65 in
[25 yr] 4.50 in
[100 yr] 6.00 in
[6-month] 1.30 in
BASLIST2
[B-001] Using [TYPE1 A] As [2 yr]
[B-001] Using [TYPE1 A] As [100 yr]
[B-002] Using [TYPE1 A] As [2 yr]
[B-002] Using [TYPE1 A] As [100 yr]
LSTEND
BasinlD Peak Q Peak T Peak Vol Area Method Raintype Event
------- (cfS) (hrs) (ac-ft) ac [Loss
B-001 0.0394 9.00 0.0404 1.00 SBUH/SCS TYPEIA 2 yr
B-001 0.5405 8.17 0.2982 1.00 SBUH/SCS TYPEIA 100 yr
B-002 0.2441 7.83 0.0941 1.00 SBUH/SCS TYPEIA 2 yr
B-002 1.0118 8.00 0.3892 1.00 SBUH/SCS TYPEIA 100 yr
BASLIST [TYPE1 A] AS [2 yr] DETAILED
[B-001] [B-002]
LSTEND
Drainage Area: B-001
Hyd Method: SBUH Hyd Loss Method: SCS CN Number
Peak Factor: 484.00 SCS Abs: 0.20
Storm Dur: 24.00 hrs Intv: 10.00 min
Area CN TC
Pervious 1.0000 ac 78.00 0.64 hrs
Impervious 0.0000 ac 0.00 0.00 hrs
Total 1.0000 ac
Supporting Data:
Pervious CN Data:
Pasture Land 78.00 1.0000 ac
Pervious TC Data:
Flow type: Description: Length: Slope: Coeff: Travel Time
Sheet Sheet Flow to Low Area 290.00 ft 1.00% 0.1500 37.41 min
Drainage Area: B-002
Hyd Method: SBUH Hyd Loss Method: SCS CN Number
Peak Factor: 484.00 SCS Abs: 0.20
Storm Dur: 24.00 hrs Intv: 10.00 min
Area CN TC
Pervious 0.5000 ac 78.00 0.33 hrs
Impervious 0.5000 ac 98.00 0.05 hrs
Total 1.0000 ac
Supporting Data: _
Pervious CN Data:
Flow Across half of acre 78.00 0.5000 ac
Impervious CN Data:
Parking, driveway and roof area 98.00 0.5000 ac
Pervious TC Data:
Flow type: Description: Length: Slope: Coeff: Travel Time
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O S S S S S S S S S S S S S S O S S S O O O O O O O O O O O O O O S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 S O O O O O O O O
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80 8808088008880�0 00o0oo0ag0000�oo�o 0008000 080008008000000��0
$$$$$$8g8o$$$$$$$$ooS$$$S$$$$o$$8000$$$$$$ggo$$$8$
0000000000000000000000000000000000000000000000000000000000000000000000
(T(T(J�f7�(T(T CT W CT(T Cn CT(T Cn(T O>(A Q)O(A(A O)O)(AJJJ V W Wt000-+ W NJAA V W W V 00)D7 CT Vt CTAAAAA A W W W W W W NNNNNNNNN
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
fOTfOTfOTfOlCCOlC(OnfOnfOnfOn(OT VOifOnIOTUOifOJi�00000S00
O0000W OODfOD00-+W NJAA V OOo00o�00irnO0i(OTi(OJiCOnAAAAAA W W W W W W NNNNNNNNN
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
�WCTSOD W A(T W JODcO(OOOOOOOtDW-4fT(11(T W—(pAOD1000 W W N W(Jl W-+O N W O)(OOAOOONJOCT (TON(OAO W J W
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W W A CT 0 V W W 0 0 0 0 W J A N N N �� : � 0 j�Z•0 0�0� �0 0�0 0 0-+-+ 0
ONACT WO��W A W J W C000 -� iNNNN � �tD 000W-40N V— A WN-400 CTAOQ�A W NNACT V CO NCT Oo(O W -4 Ul V W COA V J
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 I
S N S N S N S S N S N S N S N S N S N S N S N S N N N N N N N N N N N N N N N N N N S N S N S N S N S S N S 0 N S 0 N S S S N S S S N S S S
O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
O� ACOT WOOD-N+ -+�AA Va)cOco0CCOONONONONco(DONov0)C(n W 0(n0N)N0 Vow W CT WOCOnA�N� A W J(O00(T0c000 W -4 V 1 VOi0 W(OOAS V
-- - - - -- --- - -- - - -- - -- ---- -- - - --- - -- - -- - - - - --- -- -- - --- - - - -- - -- - - - - --- - - -
S S S S S S S S S S S S S S S S S O O O O O O O O O O O O O O O O O S O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SSO O O O O O O 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
A �SSS-+ - - — -+ N W A(TOJaDauaDaoaDaD W WO01 0000-00-0010. . . 00 —OO— O
Estimate vegetative strip to be 60' long by 10' wide.
Q = 1.486 (2.5 ft) (0.12) (0.1) = 0.637 cfs
0.07
Velocity must be less 1.5 feet per second (Page III-6-14 requirement D-6.)
V = Q/A Q =0.637cfs A =2.5sf
V =0.637/2.5 =0.25 fs
CHECK 0.25 f/s < 1.5 f/s therefore OK
STORAGE CALCULATIONS
Storage Basin
Using 2.00 inches/hour, and estimating the minimum storage volume required per acre of
impervious surface and disturbed area:
The Amount of storage area required
The amount of storage area required to hold the 100-year storm for this project is
equal volume of approximately 5,230 cubic feet.
Total Storage Provided
Construct a 50' wide x 50' long retention basin with three to one side slopes, three
feet in depth that has one foot of freeboard.
Total volume provided = 10,524 cu ft Includes the 1-foot of freeboard
Check 10,524 CF > 5,230 CF OK
Note:All designs and calculation for stormwater area for this basin have been
completed on AutoCadds 'Land Development Desktop"and Ingenious "Storm
Shed"programs.
REQUIRED INFILTRATION VOLUMES FOR THIS PROJECT
Use the Santa Barbra Urban Hydrograph Method and the Type 1A Storm Event
RLPCOMPUTE [LP-001] DETAILED
2 yr event
Time 11 12 2S Sum 1+2S 01 02S - Elev
80.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
90.00 0.00 0.00 0.00 0.01 0.00 0.01 100.00
100.00 0.01 0.01 0.01 0.03 0.00 0.03 100.00
110.00 0.01 0.01 0.03 0.05 0.00 0.05 100.00
120.00 0.01 0.01 0.05 0.07 0.00 0.07 100.01
130.00 0.01 0.01 0.07 0.09 0.00 0.09 100.01
140.00 0.01 0.01 0.09 0.12 0.00 0.12 100.01
150.00 0.01 0.01 0.00 0.03 0.12 0.00 100.00
160.00 0.02 0.02 0.00 0.03 0.00 0.03 100.00
APPENDIX A
DRAINAGE CALCULATIONS
The following calculations are based on the requirements contained in the Stormwater
Management Manual for The Puget Sound Baisn.
DESIGN AND BASIN INFORMATION SUMMARY:
Basin Summary Chart
Area Identification Size Min. Req. Storage
Roadway, Driveways, and Parking 0.4 Acres 5,230 Cu Ft
Roof Area 0.008 Acres
Disturbed Area 0.002 Acres
SCS soil classification: Saxon silt loam
Hydrologic Group:
Site infiltration design rate: 2.00-inches/hour
TREATMENT CALCUATIONS
The concept to treat the stormwater within the residential development for this project is
through a wet pond located at the beginning of the roadway system.
Commercial Development
Reference: Thurston County,DDECM Chapter 8.2.2
The minimum required treatment area for roadways and driveway surfaces as calculated
in Appendix AIII-6.1
Q=1.486 AR^0.667 S^0.5
N
Q =design runoff flow rate (ft^3,cfs)
n = Manning's n (dimensionless)
A=Cross-sectional area (ft^2)
R =Hydraulic radius = A/wetted perimeter (ft)
S = longitudinal slope as a ratio of vertical rise/horizontal run (dimensionless)
Manning's n value for grass up to 6-inches tall use—0.07
For sheet flow through vegetative filter strips use 0.5-inches for height of water.
Slope of vegetative stripe use 1-percent.
Appendix A
Drainage Calculations
I-2.15 MINIMUM REQUIREMENT#11: FINANCIAL LIABILITY
Objective: To ensure that development projects have adequate financial resources fully
implement stormwater management plan requirements and that liability is not unduly incurred
upon local governments.
All responsibility for construction, operation, and maintenance of the stormwater facility will be
the responsibility of the owner, (Mr. and Mrs. Shumaker). An operation and maintenance
covenants are required to be recorded for this project.
Qe- 5
I-2.10 MINIMUM REQUIREMENT#6: WETLANDS
Objective: To ensure that wetlands receive the same level of protection as any other waters of
the state. Wetlands are extremely important natural resources which provide multiple
stormwater benefits, including ground water recharge,flood control, and streambank erosion
protection. They are easily impacted by development unless careful planning and management
are conducted. Wetlands can be severely degraded by stormwater discharges from urban
development due to pollutants in the runoff and also due to disruption of natural hydrologic
functioning of the wetland system. Changes in water levels and the duration of inundations are
of particular concern.
There are no wetlands on this site or adjacent to the project.
I-2.11 MINIMUM REQUIREMENT#7: WATER QUALITY SENSITIVE AREAS
Objective: To ensure protection of water quality in sensitive areas.
According to Mason County Review Services there are no critical areas issues associated with
this site. This site is in a Critical Aquifer Recharge Area. Stormwater coming from the
through vegetation filter strips with further
development onion of the site will be treated oug g
P P
treatment through infiltration into the soil. Further treatment can be provided if required by
Mason County.
I-2.12 MINIMUM REQUIREMENT#8: OFF-SITE ANALYSIS AND MITIGATION
Objective: To ensure that future impacts from the project will be controlled and/or existing
impacts will not be aggravated by the project.
The retention basin has been designed to hold and infiltrate the 100-year 24-hour design storm.
There should be no or very little runoff coming from the project site into the emergency overflow
pipe that flows into a small stream and then into Hood Canal.
I-2.13 MINIMUM REQUIRMENT#9: BASIN PLANNING
Objective: To promote water shed-based planning as a means to develop and implement
comprehensive water quality protection measures. Primary objectives of basin planning are to
reduce pollutant loads and hydrologic impacts to streams and wetlands.
A retention basin has been designed for this project. The basin has been sized to hold and
infiltrate the 100-year 24 hour design storm(see appendix for basin analysis).
I-2.14 MINIMUM REQUIREMENTS#10: OPERATION AND MAINTENANCE
Obiective: To ensure that stormwater control facilities are adequately maintained and operated
properly.
Mr. and Mrs. Shumaker will be responsible for the operation and maintenance of ttse stormwater
facility. Guidelines for operation and maintenance of the facility have been included in appendix
B.
4
6. After paving has been completed landscape, sod and/or grass seed, and mulch all
disturbed areas.
7. No equipment or trucks are to be washed onsite.
I-2.6 MINIMUM REQUIREMENT#2: PRESERVATION OF NATURAL DRAINAGE
SYSTEM
Objective: To preserve and utilize natural drainage systems to the fullest extent because of the
multiple stormwater benefits these systems provide.
There are no natural drainage channels, streams, or ponds on the project site.
I-2.7 MINIMUM REQUIREMENT#3: SOURCE CONTROL OF POLLUTANTS
Objective: The intention of source control BMPs is to prevent stormwwater from coming into
contact with pollutants. They are a cost effective means of reducing pollutants in stormwater,
and, therefore, should be a first consideration in all projects.
This project will not have outside storage, fuel islands, above ground tanks, or outside
manufacturing. All material collected from sweeping of the parking area will be disposed of in a
solid waste dumpster. Maintenance of Stormwater Drainage Facility will be minimal and will
only require the mowing of grass and landscape maintenance.
I.2.8 MINIMUM REQUIREMENT#4: RUNOFF TREATMENT BMPS
Objective: The purpose of runoff treatment is to reduce pollutant loads and concentrations in
stormwater runoff using physical, biological, and chemical removal mechanisms. When wite
conditions are appropriate infiltration can potentially be the most effective BMP for runoff
treatment.
In order to reduce pollutants from the stormwater coming from the project site, a vegetation filter
strip has been incorporated around the retention facility. The filter strip has been designed
according the recommendation outlined in Chapter III, Appendix-6.1 (see appendix A for filter
strip calculations). The stormwater will not be discharged into a stream or wetland. On exiting
culvert will be used for emergency overflow outlet.
I-2.9 MINIMUM REQUIREMENT#5: STREAMBANK EROSION CONTROL
Objective: To reduce streambank erosion which results from increased runoff due to
development. The standard is intended to reduce the frequency and magnitude of bankfull flow
conditions, which are highly erosive and increase dramatically as a result of development.
Conventional flood detention practices do not adequately control streambank erosion because
only the peak rate of flow is decreased, not the frequency and duration of bankfull conditions.
Streambank erosion control is not required for this project. All stormwater runoff will be
retained on site.
Qe- 3
Project Overview
The Shumaker Farm and Feed Store is a commercial development that is being proposed within
the urban boundary of Mason Country. This project proposes to develop a 1.0-acre parcel of
land into a commercial business store with parking, landscaping, and a stormwater facility.
The main entrance into the Shumaker Store will come from Old Belfair Road. The access and a
portion of the property have been paved to provide customer parking and deliveries. Stormwater
from this area will be directed to a vegetation strip for treatment and then into a retention pond
for infiltration.
Existing Conditions
The development site is located in the northwest corner of Old Belfair Road and the Davis Farm
Road Intersection. The I-acre parcel is currently covered with grass for pasture. Some fill has
been brought and compacted for the store. The site is fenced on all four sides.
Adjoining properties surrounding the development have been developed into residential parcels.
The local fire department is located directed across Old Belfair Road and an auto repair shop on
the adjacent parcel to the north. Further development of those properties will not be expected.
The existing zoning for the project site is R(Residential). There are no existing structures on the
site at this time.
The project site is located in an aquifer sensitive area based on Mason County Services. This
project will comply with the stormwater treatment requirements of the Department of Ecologies,
Stormwater Management Manual for the Puget Sound Basin.
I-2.5 MINIMUM REQUIREMENT#1: EROSION AND SEDIMENT CONTROL
Objective: To control erosion and prevent sediment from leaving the site.
Best Management Practices shall be implemented before, during and after the construction
period. Filter fabric for temporary erosion control (see appendix B for standard erosion control
detail, notes and plans) shall be placed around area that drains off site, during the construction
period. Areas to be hydro seeded will be in accordance with Washington State Standard
Specification for Road, Bridge, and Municipal Construction, Division 8, Section 8-01 Erosion
Control.
Best Management Practices (BMP's) will be employed before any construction begins on-site.
The planned construction sequence is as follows: _
1. Install filter fabric fencing, where appropriate.
2. Install construction entrance.
3. Clear site (clearing and grubbing).
4. Install underground utilities (telephone, water, sewers, ect.).
5. Complete earthwork and stormwater facilities.
2
1
SECTION 1 - STORMWATER DRAINAGE REPORT
Proposed Project Description
Developer: Clint and Kelly Shumaker
60 NE Davis Farm Road
Belfair, WA 98528
Parcel Numbers: 12827330000
Total Project Area: 1.0 Acres
Zoned: R (Residential)
Section,Township, Range: Section(s) 29
Township 23 North
Range 1W, W.M.
Project Description and Report
Table Of Contents
STORMWATER DRAINAGE REPORT
PROPOSED PROJECT DESCRIPTION AND REPORT............................................ 1
PROJECTOVERVIEW ........................................................................... 2
EXISTINGCONDITIONS ....................................................................... 2
I-2.5 MINIMUM REQUIREMENT#1: EROSION AND SEDIMENT CONTROL...... 2
I-2.6 MINIMUM REQUIREMENT#2: PRESERVATION OF NATURAL DRAINAGE
SYSTEM ................................................................................................ 3
I-2.7 MINIMUM REQUIREMENT#3: SOURCE CONTROL OF POLLUTANTS...... 3
I-2.8 MINIMUM REQUIREMENT#4: RUNOFF TREATMENT BMPS..................... 3
I-2.9 MINIMUM REQUIREMENT#5: STREAM BANK EROSION CONTROL....... 3
I-2.10 MINIMUM REQUIREMENT#6 WETLANDS........................................ 4
I-2.11 MINIMUM REQUIREMENT#7 WATER QUALITY SENSITIVE AREAS... 4
I-2.12 MINIMUM REQUIREMENT#8 OFF-SITE ANALYSIS AND MITIGATION.. 4
I-2.13 MINIMUM REQUIREMENT#9: BASIN PLANNING......................................... 4
I-2.14 MINIMUM REQUIREMENT#10: OPERATION AND MAINTENANCE....... 4
I-2.15 MINIMUM REQUIREMENT#11: FINANCIAL LIABILITY...................... 5
APPENDICES
DRAINAGE CALCULATIONS
SOILS REPORT
EROSION CONTROL REPORT
SECTION 1 - CONSTRUCTION SEQUENCE AND PROCEDURE
SECTION 5 - INSPECTION SEQUENCE
MAINTENANCE PLAN
REQUIRED MAINTENANCE
RESPONSIBLE ORGANIZATION
VEGETATION MANAGEMENT PLAN
VICINITY MAP/SITE PLAN
Preliminary Drainage Report
Shumaker Farm and Feed Store
Belfair, Washington
June, 2004
Project Information
Project: Shumaker Farm and Feed Store
Prepared For: Clint and Kelly Shumaker
Contact: Kelly Shumaker
60 NE Davis Farm Road
Belfair, WA 98528
(360) 509-5303
Project Engineer
Prepared by: Contours & Concepts Engineer, L.L.C.
4405-7`h Avenue SE, Suite 300
Lacey,WA 98503
(360)438-0301
Contact: Bill Turner, P.E.
(360)438-0301
"I hereby certify that this Drainage
and Erosion Control Plan for The
tiQ'oF a Shumaker Farm and Feed Store has been
prepared by me or under my
_ z supervision and meets minimum
standards of Mason County and normal
�0 33824 standards of engineering practice. I
` Stt ��ti understand that the jurisdiction does
isri*SIONAL not and will not assume liability for
the sufficiency, suitability, or
—� performance of drainage facilities
EXPIRES 66/13/05
designed by me. "
NAi40 OD 1031
ma lyffz c5t&M
Drainage Report
June, 2004
D
'JUN 1 7 �nn�
�E�Fl��►� ��t-r(C�
1*
Contours & Concepts Engineer, L.L.C.
PO Box 476
Tenino, WA 98589
(360) 438-030I
f
SEC:29 TWNSHP: 23N S. RNGE: 1 W, W.M. Shumaker Feed Store o
PP
PROPERTY LINE (TYP.) SITE ADDRESS: 60 NE DAMS FARM RD Q
�— BELFAIR, WA 98528 S o
PHONE: (360) 509-5303 Utilities LL Z m M m
PROP—ROCK WALL ZONING: COMMERCIAL WATER-OT g fi
2'
Tax Parcel: 112329 12 980M2 &90061 SEVER-DN-9TE LD u n
Developed Site Area: 1.0 Acres ELECT-PSE co y m w
PHONE-SPRINT LU
a i a
tat SILT FENCE DETAIL Sxlo WASTE-CITYw o 0
0
0
0 4fl�` N.T S a: w w � i O
SILT FABRIC FENCE a LL V FILTER FABRIC MATERIAL 50" WIDE ROLLS 2"x2"x14 GA WIRE Q O O 1 U Q.
(TYP') USE STAPLES OR WiRE RINGS TO ATTACH FABRIC OR EQUIVALENT 2'x2"x14 GA WiRE m
IMF 1�w Bm r I I FABRIC TO W1RE
70 1�AT 1�q � FABRIC OR EQUIV. a
a
PP FILTER FABRIC 0'6" v
MATERIAL N
_ m
a_
w
'cov 2 D O 3 ¢ O
d 1 NOTE: FOR SILT FENCE k CONSTRUCTION °o O - P: O 3
C / ENTRANCE DETAILS SEE THIS PAGE EX. + o00 <
NOTE: FOR GENERAL NOTES SEE THIS PAGE FL I o °o°o 5'0" Er ow
W FL It n WASHED R� OR NA TTI VE o°
BACK FILL ON BOTH SIDES Loo
o w
OF FILTER FABRIC FENCE 0 3 3 Z
BURY BOTTOM OF FILTER MATERIAL w w 0
No ° IN 18"x12" TRENCH 5 j w
cc w
cc <
CZ <
6'MAX
2"x4" WOOD POST
2"x4" WOW POSTS, STANDARD OF BETTER ALT. STEEL FENCE POSTS �•I.M
O F OR EQUAL ALTERNATE: STEEL FENCE POSTS
EX. BUILDING
PAD F a
O U. ac
o AL GENERAL NOTES (EROSION CONTROL o O
1. EROSION CONTROL MEASURES SHALL BE IN PLACE PRIOR TO THE BEGINNING OF CONSTRUCTION. THE PROJECT rn 3
C� ENGINEER k THE CITY SHALL INSPECT AND IMPROVE THE INSTALLATION Or EROSION CONTROL MEASURES PRIOR TO
STABILJZED CONSTRUCTION BEGINNING OF CONSTRUCTION. p
ENTRANCE 2. EROSION CONTROL MEASURES ARE NOT LIMITED TO THE ITEMS ON THIS PLAN. THE CONTRACTOR IS RESPONSIBLE p
FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION CONTROL MEASURES. NO SILTATION OF EXISTING OR
PROPOSED DRAINAGE FACILITIES SHALL BE ALLOWED. CARE SHALL BE TAKEN TO PREVENT MIGRATION OF SILTS TO OFF
SITE PROPERTIES.
pp 3. THE CONTRACTOR SHALL MAKE DAILY SURVEILLANCE OF ALL EROSION CONTROL MEASURES AND MAKE ANY
P 'WV / WM NECESSARY REPAIRS OR ADDITIONS TO THE EROSION CONTROL MEASURES. THE CONTRACTOR SHALL PROVIDE
EX. 1
J ADDITIONAL EROSION CONTROL MEASURES AS DETERMINED NECESSARY BY THE CITY INSPECTOR AND/OR THE PROJECT
C DATUM ENGINEER. FAILUREASSUMED ELEL U
HORIZONTAL: NOT A BOUNDARY SURVEY TO COMPLY TO ALL LOCAL AND STATE EROSION CONTROL REQUIREMENTS MAY RESULT IN CIVIL PENALTIES BEING LEVIED
nT CIE
L+ATE) TTT0 TTW A vr " AGAINST THE CONTRACTOR AND/OR PROJECT OWNER.
t +-
V L 1'cue 111711 II A All references toro property 1 bearing, corners, or any r lines,
references
which indicate property alignment SILT FENCE (GENERAL NOTES)
or locations were acquired from O
1. Filter fabric shall be purchased in a continuous roll cut to the length of the barrier to
ovoid use of joints. When pints are necessary, filter cloth shall be spliced together O
and is referenced herein, only at a support post, with a minimum 6-inch overlap, and securely fastened at O N
f STABILIZED CONSTRUCTION ENTRANCE both ends to post. 14 =1 ^
SCALE: N.T.S 2. Posts shall be spaced a maximum of 6 feet apart and driven securely into the ground M O
(minimum of 30 inches). U y
STABILIZED CONSTRUCTION ENMNCR NOTES 3. A trench shall be excavated approximately 8 inches wide and 12 inches deep along V
the line of posts and upslope from the barrier. S'
1. MATERIAL SHALL BE 4' TO 6" QUARRY SPALLS AND MAY BE TOP- 4. When standard strength filter fabric is used, a wire mesh support fence shall be
f DRESSED WITH 1" TO 3" ROCK. (STANDARD SPECIFICATIONS). fastened securely to the upslope side of the posts using heavy-duty Ir wire staples at ✓] a least 1 inch long, tie wires or hog rings. The wire shall extend into the trench a O
2. THE ROCK PAD SHALL BE AT LEAST 12" THICK AND 100' LONG. minimum of 4 inches and shall not extend more than 36 inches above the original 1 y F,Q WIDTH SHALL BE THE FULL WIDTH OF THE VEHICLE INGRESS AND
J ground surface. O w
Qp EGRESS AREA. SMALLER PADS MAY BE APPROVED FOR SINGLE-FAMILY 5. The standard strength filter fabric shall be stapled or wired to the fence, and 20
tits RESIDENTIAL AND SMALL COMMERCIAL SITES.
SZ Inches of the fabric shall be extended Into the trench. The fabric shall not extend
S.*1 3. ADDITIONAL ROCK SHALL BE ADDED PERIODICALLY TO MAINTAIN PROPER more than 36 inches above the original ground surface. Filter fabric shall not be
FUNCTION OF THE PAD. stapled to existing trees.
�S QF 4. IF THE PAD DOES NOT ADEQUATELY REMOVE THE MUD FROM THE VEHICLE 6. When extra-strength filter fabric and closer post spacing is used, the wire mesh
Q{iiP�o WHEELS. THE WHEELS SHALL BE HOSED OFF BEFORE THE VEHICLE ENTERS drecttlly to the po fence stsewith mall other np ovisions such a cof above nase, the lotester oapplyingbric is stupled or wired 0 WgS��s
A PAVED STREET. THE WASHING SHALL BE DONE ON AND AREA COVERED U
7. Filter fabric fences shall not be removed before the upslope area ha3 been t�
/ 000 WiTH CRUSHED ROCK AND WASH WRiER SHALL DRAIN TO A SEDIMENT permanently stabilized.
4124, RETENTION FACILITY OR THROUGH SiLT FENCE.
i J 8. Filter fabric fences shall be inspected immediately after each rainfall and at least
R-25' MIN. daily during prolonged rainfall. Any required repairs shall be made Immediately. z +n
`O 34371
4--8" QUARRY SPALLS 12" MIN. DEPTH j SHEET ID CODE
ONA � ER
PROVIDE FULL WIDTH OF SHEET No.
INGRESS.EGRESS AREA. 15' MIN. EXPIRES 11 '09/ 1 of 1
i
- w--
4� t
e
REVIEW INFORMATION 95%Complete DESIGN INFORMATION
TUnm
Clint & Kelly Shumaker REVIEWER: OWNER PROJECT IDENTIFICATION No.
ontours & FILE NAME: Bmsmap
DATE SENT TO REVIEWER:
Feed Store oneepts ACTION
ACTION
1 OZ Vngineering DESIGNED BT/DB 67A4
General Site Plan DRAWN MB fl/7N4
O Phone:360-438-0301
CHECKED BT/DB 6/7/04
m Lacey,Wa PLOTTED DATES
Appendix E
Vicinity Map/Site Plan