HomeMy WebLinkAbout19-20 Site PlanLEGEND
EXISTING FEATURES
EXISTING EDGE OF PAVEMENT EX EP
EXISTING EDGE OF GRAVEL EX EG
EXISTING CURB AND GUTTER
EX. INTERMEDIATE CONTOUR
EXISTING INDEX CONTOUR
EXISTING SPOT ELEVATION
EXISTING TELEPHONE LINE
EXISTING SANITARY SEWER
EXISTING ELECTRIC SERVICE
EXISTING GAS LINE
EXISTING STORM SEWER
EXISTING FENCE LINE
EXISTING DITCH LINE
EXISTING WATERLINE W/ TEE
EXISTING FIRE HYDRANT
EXISTING WATER VALVE
EXISTING REDUCER
EXISTING TREE DRIP LINE
EX CG -6
X 50.0'
T F r 7 T 7 r
E E E E-E--E
-%i$---ers-6AFr sus QW -
EX. 15" RCP
X X - X
D& EX. FH
a �y-
,, r
PROPOSED FEATURES
PROPOSED EDGE OF PAVEMENT
PROP EP
PROPOSED EDGE OF GRAVEL
PROP EG
PROP. CURB & GUTTER
PROP CG -6
PROP. REVERSE CURB & GUTTER
PROP CG -6R
PROPOSED CONTOUR
50
PROPOSED SPOT ELEVATION
+50-0
PROPOSED STORM SEWER
PROP. 24" ADS
PROPOSED SANITARY SEWER
- s - s - s - s - s -
PROPOSED TELEPHONE
_T r r r T -
PROPOSED ELECTRIC
- E - E - E - E - E -
PROPOSED GAS LINE
- cis - cis - GAS - cis -
PROPOSED WATER LINE
- w - w - w - w - w -
PROPOSED WATER METER
1 "WM
PROPOSED FIRE HYDRANT
PROP. FH
COMMON LABELS & FEATURES
PROPERTY LINE OF PROJECT
NEIGHBORING PROPERTY LINES -
EASEMENT LINE --
PROPERTY CORNER FOUND
PARKING SPACE TOTALS
ADA HANDICAP PARKING STALL
SIGNS
SANITARY MANHOLE IDENTIFIER
STORM DRAIN STRUCTURE IDENTIFIER
LIGHT POLES
LOCATION OF TEST PITS
EROSION
EROSION & SEDIMENT CONTROL FEATURES
MAXIMUM DAILY
USE (GALLONS)
LIMITS OF CLEARING & GRADING
3000
INLET PROTECTION ® /p
35
OUTLET PROTECTION
00
Zoning
CHECKDAM _ CD
Legal References
DIVERSION DIKE 00DD
SILT FENCE W/ WIRE SUPPORT X X-0
RIP RAP RR
0 0
SEDIMENT TRAP ST
FREDERICK WATER CONSTRUCTION NOTES
Rev. Jan. 2019
1. Frederick Water's Water and Sewer Standards and Specifications are available at www.frederlckwater.com
2. The contractor shall adhere to Frederick Water standards and specifications in effect at the time of construction.
3. The contractor shall coordinate with and arrange for inspection by Frederick Water.
4. The contractor shall connect anew sewer line to an existing manhole by core drilling the manhole.
5. A new water (or forced sewer) main shall be connected to an existing main by a wet tap.
Frederick Water shall furnish all needed material and make the tap.
a. An Application for Wet Tap shall be submitted and the initial fee paid before the tap is made.
6. Exact locations of water and sewer services on new lines are to be coordinated with Frederick Water's inspector.
7. Frederick Water's maintenance division shall furnish and install all water meters through 2 inch in size.
It is the contractor's responsibility to have the meter box assembly instal/ed correctly.
Before a permanent meter is installed:
a. The meter box, with its frame and cover, must be properly aligned with the coppersetter.
b. The frame and cover shall be set to final grade.
c The distance between the top of the cover and the yoke bar shall be between 20 and 23 inches.
d. All components of the meter box assembly shall be in proper working order.
8. For services that connect to existing lines:
a. Frederick Water shall furnish and install:
i. all % VY4 ", Y4 ", 1 ", 1Y2" and 2" water services
ii. all sewer services.
b. The owner/deve%per shall:
L coordinate (or have the contractor coordinate) the location of the service lateral with
Frederick Water's engineering assistant
ii submit an Application for Service and pay the required fees.
9. All water service lines must have a backflow prevention assembly (double check valve or RPZ, as required). The assembly must meet
ASSE standard number 1015 or 1013.
10. All fire lines must have a backflow prevention assembly (detector double check valve or RPZ, as required). The assembly shall meet ASSE
standard number 1048 or 1047. Any exterior, privately owned fire line, interior or exterior, shall also have a fire service HP Protectus III
meter. This assembly shall be installed immediately before the backflow prevention unit. Radio read remotes are required.
11. Frederick Water shall review the mechanical plan(s) for design and material approval of a buildings:
P () 9 PP
a. domestic water meter and its backflow prevention device, and/or its
b. Fire service line's backflow prevention device.
12. DEQ must also approve sewerpump stations. Frederick Water requires a copy of DEQ's Certificate to Operate and a copy of the station's
DEQ approved 0&M manual. These documents must be received before substantial completion is issued and water meters released.
WATER & SEWER DEMAND
AVERA GEDAILY
USE (GALLONS)
MAXIMUM DAILY
USE (GALLONS)
MAXIMUM PEAK
FL0WRATE (GPM)
3000
6000
35
THESE NUMBERS ARE ESTIMATES FOR 150 EMPLOYEES
GENERAL NOTES
1. Permits must be issued from VDOT prior to any construction in a public right-of-way.
2. The Manual on Uniform Traffic Control Devices (MUTCO) must be adhered to when working in a public right of way.
3. The contractor will remove all mud and debris from the public right of way that is left by vehicles entering and leaving the site.
4. Any damage to neighboring properties including county roads and sidewalks, caused by the development of this site will be the
responsibility of the developer. All damage must be repaired to original conditions.
5. A construction entrance must be instal/ed in accordance with the "Virginia Erosion and Sediment Control Handbook " Section 3.01. The
contractor must maintain this access for the duration of the project.
6. The contractor will be responsible for adequate and positive drainage of this site.
7. The contractor will obtain a Land Disturbance Permit prior to any site work or construction.
8. A/l construction will be done fol/owing the laws and guidelines set forth by OSHA and VOSH.
9. The contractor will notify engineer of record of any discrepancies between the approved plans and existing site conditions.
10. The developer is responsible for the relocation of any utilities required by this site plan.
11. All Erosion and Sediment Control devices shown on this site plan shall be installed prior to construction.
12. All controlled fill must be compacted to a minimum of 95910 density following Method A' of the Standard Proctor ASTM -D698,
AASHT0-799, or V7M-1 as applicable. Any fill placed under buildings, structures, or pavement must be inspected and approved by a
professional soils engineer. A geotechnical report supersedes this note if provided.
13. The contractor is responsible for contacting MISS UTILITY prior to any site work. All utilities shown on this plan are approximate
locations and not all utilities may be shown.
14. The contractor will contain all litter and debris on-site. The work must be left in an orderly manner at the end of each workday.
15. An approved set of site plans must be on-site during the construction process.
16. The contractor will notify all utility companies prior to excavation within easements.
17. The contractor will seed and straw, for soil stabilization, any disturbed areas that will be left for more than thirty days.
DEPARTMENT OF INSPECTION GENERAL NOTES
1. Buildings shall comply with the Virginia Uniform Statewide Building Code & Sections 311, S (storage) of the International Building Code/2015 & the
2015 Fire Code. Other codes that apply are ICC/ANSI A1171-3-09 Accessible and the Usable Buildings & Facilities & the 2015 Virginia Energy Code.
2. Proposed 159, 000 sq it single story warehouse/business shall comply with Chapter 5 for height and area (T503). Limitations for type of construction
in Table 503 of the 2015 IBC and fire Protection shall be installed as required in Chapter 91BC. Fire Pump shall meet NFPA 20.
3. Proposed unlimited area facilities shall meet Section 507, Un/imifedArea Bui/dings and maintain an open perimeter of 60.
4. Building shall comply with ANSI Handicap A1171-3-09 for parking, entrance, and egress. All required egress shall be accessible.
5. Landings at doors shall not exceed 1:48 slope and thresholds shall not exceed 0.5 and walkways shall not exceed 1:20 slope; HC Signage shall
comply with USBC 1106.8.
6. Special Inspection requirements of Chapter 17 of IBC shall apply to this structure and must be sealed by a Virginia Registered Design Professional.
(Soils, concrete, steel, etc.); specifically, fill for slab exceeding code shall require an engineered foundation.
Z A design professional licensed of the Commonwealth of Virginia shall seal the structural plans submitted for building permits.
8. Maximum slope across handicap parking stalls shall not exceed 2%, handicap signage shall comply with USBC 1106.8.
9. All required egress doors shall be accessible to a minimum exterior area for assisted rescue, section 1016 USBC/IBC. Note fire ratings around this
door if this section is utilized. Required exits shall not exceed maximum travel distance listed in Table 1016.1.
10. Storage racks exceeding 12' in height requires a permit and shall comply with the International fire Code. High pile storage areas require fire
department access around the perimeter of the building. Access doors shall not be placed further apart than 100'.
11. No gutter downspouts shall discharge over walkways.
12. A geotechnical evaluation shall be performed and submitted with application as required by USBC/IBC Section 1803.
13. Public Entrances into spaces larger than 3000 sf shall be provided with a vestibule as detailed per ANSIA117.1-09.
FIRE MARSHALL GENERAL NOTES
1. An inspection by the Fire Marshall's office will determine where curbing must be painted yellow.
2. 'No Parking - Fire Lane" signs will be placed on the site by the fire Marshall's direction.
3. The contractor must align the fire hydrants to the direction as determined by the Fire Marshall.
4. Burning brush piles of natural vegetation requires a permit. Burning construction debris is prohibited.
5. Emergency vehicle access must be provided at all times. Fire hydrants will be always be left unobstructed.
NAME:
CERTIFICATION #
EXP. DATE:
RESPONSIBLE LAND DISTURBER
CONSTRUCTION ENTRANCE CE 1. The Responsible Land Disturber is that party responsible for carrying out the land disturbing activity as set forth in the plans.
2. Note: An on-site pre -construction meeting is required with the Owner, Site Contractor, Public Works, & Designer prior to commencing any site work.
3. The contractor will possess a Land Disturbance Permit prior to any site work or construction.
VDOT GENERAL NOTES
Rev. June 2013
VI. All work on this project shall conform to the current editions and latest revisions to the Virginia Department of Transportation (VDOT)
Road and Bridge Specifications and Standards, the Virginia Erosion and Sediment Control Regulations, and any other applicable state,
federal, or local regulations applicable. In case of a discrepancy or conflict between the Standards or Specifications and Regulations, the
most stringent shall govern.
V2. All construction shall comply with the latest U.S. Department of Labor, Occupational Safety & Health Administration (OSHA), and Virginia
Occupational Safety & Health (VOSH) Rules & Regulations.
V3. When working on VDOT right-of-way, all traffic control, whether permanent or temporary, shall be in accordance with the current edition
of VDOTs Work Area Protection Manual. A transportation management plan needs to be submitted for approval and land use permit
issued prior to any execution of work within the VOOT right of way.
V4. The developer shall s a be responsible for relocating, at his expense, any and all utilities, including traffic signal poles, junction boxes,
controllers, etc., owned by VOOT or private /public utility companies. It is the sole responsibility of the developer to locate and identify
utility facilities or items that may be in conflict with the proposed construction activity. V007 -approval of these plans does not indemnify
the developer from this responsibility.
V5 Design features relating to field construction, regulations, and control or safety of traffic may be subject to change as deemed
necessary by VDOT Any additional expense incurred as a result of any field revision shall be the responsibility of the developer.
V6. If required by the local VOOT Land Development Offce, a pre -construction conference shall be arranged and held by the engineer and/or
developer with the attendance of the contractor(s), various County agencies, utility companies and VDOT prior to initiation of work.
V7. The contractor shall notify the local VDOT Land Development Office when work is to begin or cease for any undetermined length of time.
VDOT requires 48 hours advance notice prior to any required or requested inspection.
V8, The contractor shall notify the Traffic Operations Center at (540) 332-9500 far any traffic control plan that impacts a VDOT maintained
Interstate or Primary roadway to provide notification of the installation and removal of the work zone.
V9. The contractor shall be responsible for maintaining a VOOT permitted temporary construction entrance(s) in accordance with Section 3.02 of
the Virginia Erosion and Sediment Control Handbook. Furthermore, access to other properties affected by this project shall be maintained
through construction.
V10. Contractor shall ensure adequate drainage is achieved and maintained on the site during and at the end of construction.
V11. A# water and sewer lines within existing or proposed VDOT right-of-way shall have a minimum thirty-six (36) inches cover and when
Possible shall be installed under roadway
drainage facilities at conflict oinis.
V12. Any unusual subsurface conditions (e.g., unsuitable soils, springs, sinkholes, voids, caves, etc.) encountered during the course of
construction shall be immediately brought to the attention of the engineer and VDOT. Work shall cease in that vicinity until an adequate
design can be determined by the engineer and approved by VDOT
V13. All fill areas, borrow material and undercut areas shall be inspected and approved by a VDOT representative prior to placement and fill.
Where CBR testing is required, a VDOT representative shall be present to insure the sample obtained is representative of the location.
When soil samples are submitted to private laboratories for testing, the samples shall be clearly identified and labeled as belonging to a
project to be accepted by VDOT and that testing shall be performed in accordance with all applicable VDOT standards and procedures.
V14. All roadway fill, base, subgrade material, and backfill in utility/storm sewer trenches shall be compacted in six (6) inch lifts to 95% of
theoretical maximum density as determined by AASHTO T-99 Method A, within plus or minus 2% of optimum moisture for the full width of
any dedicated street right-of-way. At the direction of VOOT, density tests shall be performed by a qualified independent agency in
accordance with VDOT Road and Bridge Specifications. Certified copies of all test reports shall be submitted to VDOT daily, unless specified
otherwise.
VI5. VDOT Standard CD and UD underdrains shall be installed where indicated on these plans and/or as specified by VDOT.
Vi 6. A post installation visual/video camera inspection shall be conducted by the Contractor on a// pipes identified on the plans as storm sewer
pipe and a select number of pipe culverts. For pipe culverts, a minimum of one pipe installation for each size of each material type will be
inspected or ten percent of the total amount for each size and material type summarized. Al/ pipe installations on the plans not identified
as storm sewer pipe shall be considered as culvertpipe for inspection purposes. Additional testing may be required as directed by the Area
Land Use Engineer or their representative.
V17. The installation of any entrances and mailboxes within any dedicated street right-of-way shall meet VDOT minimum design standards and is
the responsibility of the developer.
V18. Prior to VDOT acceptance of any streets, all required street signage and/or pavement markings shall be installed by the developer or, at
VDOTs discretion, by VDOT on an account receivable basis following the Manua/ On Uniform Traffic Control Devices.
V19. The developer must provide to the VDOT Land Development Office a list of a// materia/ sources prior to the start of construction. Copies of
all invoices for materials utilized within any dedicated street right-of-way must be provided to the local VDOT Residency Office prior to
acceptance of that work. Unit and total prices may be obscured.
V20. Aggregate base and subbase materials shall be placed on subgrade by means of a mechanical spreader. Density will be determined using
the density control strip in accordance with Section 304 of the VDOT Road and Bridge Specifications and VTM-10. A certified compaction
technician shall perform these tests. Certified copies of test reports shall be submitted to VDOT daily, unless specified otherwise. In addition
to checking stone depths, a VDOT representative shall be notified and given the opportunity to be present during the construction and
testing of the density control strip.
V21. Asphalt concrete pavement shall be placed in accordance with Section 315 of the VDOT Road and Bridge Specifications. Density shall be
determined using the density control strip as specified in Section 315 and VTM-76. A certified compaction technician shall perform these
tests. Certified copies of the test reports shall be submitted to VDOT daily, unless specified otherwise. A VDOT representative shall be
notified and given the opportunity to be present during the construction and testing of the control strip.
V22. In accordance with Section 302.03, the foundations for pipe culverts thirty-six (36) inches and larger shall be explored below the bottom
of the excavation to determine the type and condition of the foundation. The contractor shall report findings of foundation exploration to
the engineer and V007 -for approval prior to placing pipe. Foundation designs shall comply with VOOT Road and Bridge Standard PB -1.
Where soft, yielding, or otherwise unsuitable foundation is encountered, the foundation design and/or need for foundation stabilization shall
be determined b the engineer and approved b VDOT.
Y 9 PP Y 0
V2 . VDOT Standard Guardrail shall be installed where warranted
3 a anted and/oras proposed on these plans in accordance with VDOT s installation criteria.
Final approval of guardrail layout to be given by VDOT after grading is mostly complete.
V24. Approval of this plan shall expire five (5) years from the date of the approval letter.
V15. VDOT Standard CG -12 Curb Ramps shall be installed where indicated on these plans and/or as specified by VDOT
V26. Th foundations
e for all box culverts shall be investigated by means of exploratoryburings advanced below
proposed foundation elevation to
determine the type and condition of the foundation. The contractor shall submit copies of borehole logs and report findings of foundation
exploration to the engineer and VDOT for approval prior to constructing box. Foundation designs shall comply with VDOT Road and Bridge
Standard P6-1. Contra to the Standard where rock is encountered and cast -in-place box is proposed, h k
Contrary p p posed, t e thickness of bedding shall be
six (6) inches. Where soft, yielding, or otherwise unsuitable foundation is encountered, the foundation design and/or need for foundation
stabilization shall be determined by the engineer and approved by VDOT
ITE
CODE
150
TRIP GENERATION DATA
WAREHOUSE 1 82,798 sf
IN
OUT
TOTAL
56
39
95
DATA TAKEN FROM THE I. T.E. MANUAL
IN
OUT TOTAL
7
84 91
LANDSCAPING NOTES
ADT
655
1. Miss Utility must be contacted prior to planting. Advise engineer of record of any conflicts in planting locations and utility markings.
Landscaper must stake and guy all trees. Stake locations must avoid utilities.
2. Trees and shrubs shall be healthy and free of insect eggs, larvae, and disease. The plants shall have ample roots and be well branched.
The planter shall guarantee all plants for one year.
3. Landscaper shall use shredded mulch in all planting beds and around trees. Tags from each plant will be provided to the owner.
4. Plant substitutions will be allowed with the written approval of the Frederick County Planning Department.
5. All plantings shall conform with the Frederick County Zoning Ordinance §165-203.018.
VICINITY MAP
PROJECT INFORMATION
Owner
Zivic Family, LLC
260 Lenoir Drive
Winchester, VA 22603
(540) 667-0084
Contact: Ryan Zivic
Property Data
Tax Map Number
43-(19)-9
Address
260 Lenoir Drive
Area
10.016 acres
Zoning
M-1
Legal References
DB 970, PG 926
Existing Use
Metal Fabrication
Proposed Use
Same w/ additional parking
Disturbed Area
0.60 acres
Zoning Data
Open Space Minimum
25% = 2.50 acres
Open Space Proposed
53% = 5.33 acres
F.A.R. Maximum
1.0
F.A.R. Existing
0.19
Building Data
Type of Construction Concrete/Masonry
Existing Use Sheet Metal - Manufacturing
Proposed Use Sheet Metal - Manufacturing
Existing Area 82,798 sf
Height Allowed 60 feet
Existing Height 35 feet
Contact Numbers
Surveying & Engineering Firm:
GreyWolfe, Inc. (540) 667-2001
Zoning Enforcement:
Department of Planning (540) 665-5651
Site Inspections:
Department of Inspections (540) 665-5650
Erosion and Sediment Control.
Department of Public Works (540) 665-5643
Sanitary Sewer and Water:
Frederick Water (540) 869-1061
VOOT., (540) 535-1824
Telephone: Verizon (301) 954-6282
Electric: Rappahannock Electric
Cooperative (540) 622-2098
Gas: Washington Gas Co. (540) 869-1111
MISS UTILITY: 1-800-551-7001
Building Setbacks Per Code
Existing
Front(LenolrDr): 75'
145.7'
Left Side: 25'
76.8'
Right Side: 25'
29.3'
Dr.): Rear(TY ) : 75
767.1
Parking Setbacks Per Code
Existing
Front(Lenoir Dr): 10'
66.0'
Left Side: 5'
18.0'
Right Side: 5'
S5' (Pr)
Rear(Tyson Dr): 10'
428.7'
Use For Parking Employees Space
per Sq. Ft
Manufacturing: 100 max. per shift 1.5 per employee
Total Parking Spaces Required
150
Total Parking Spaces Existing
126
Total Parking Spaces Proposed
40
Total = 166
# of Handicap Spaces Required
6
# of Handicap Spaces Existing
7
# of Loading Spaces Required
5
# of Loading Spaces Existing
8
Ex. Monument Sign Data
0 acres
Sign Area 48 sf
�
Monument Sign Height 6 ft
Natural S. W.
SEE FREDERICK COUNTY ZONING
ORDINANCE § 165-201.06
>
Sheet Index
Retention Areas
Cover Sheet & General Notes Sheet 1
Site Plan Sheet 2
has been designated for a future location and a screening
Erosion & Sediment Control Plan Sheet 3
0 acres
Stormwater Plan Sheet 4
V7
Previous Site Plans
#26-77
#34-86
#62-99
#01-04
#13-17
Frederick County Zoning Administrator
Date
Final Site Plan Approved by Frederick County Planning Department Reviewer Date
1. Frederick County Zoning Administrator approval expires at five (5) years from the date of site plan approval.
2. Frederick Water approval is valid for three (3) years from date of approval. If construction is not in progress at the end of this period,
Authority approval shall be void.
3. The Frederick County Department of Public Works approval is not enough to begin site development. The owner/contractor must obtain a
Land Disturbance Permit and agree to periodic inspections.
4. The Frederick County Department of Inspections approval does not constitute a building permit. Building plans must be submitted and
approved prior to constructing any structure. Furthermore, the site must meet all ADA requirements and be approved by Inspections.
Q1
Zoning
General Notes
LC
Maximum
1. Thisro'ect will disturb any environmental features as
P I
Environmental
Existing
Disturbance Proposed
defined by the Frederick County Zoning Ordinance.
Features
Acrea a
Allowed Disturbance
2. The owner will be responsible for obtaining or granting
Floodplain
0 acres
0% 0%
U
easements shown on this plan.
o
0
3. Easements will be recorded and copies sent to the parties
Lakes &Ponds
0 acres
0% 0%
C:
involved.
Wet/ands > IAC
0 acres
0% 0%
fa
4. All utilities that will service this site must be placed
Sinkholes
0 acres
° o
0% 0 /o
�
underground.
Natural S. W.
0 acres
10% 0%
>
5. A Dumpster is not proposed at this time. However, an area
Retention Areas
has been designated for a future location and a screening
Steep Slopes >50%
0 acres
25% 0%
V7
detail is included on the plans.
n
C:
6. Outdoor lighting shall be provided by poles in parking lot.
Woodlands
0 acres
25% 0%
J
See lighting plan -sheet 2.
C
7 There are no modifications to the existing buildings approved
with previous plans.
APPROVALS SP #19-20
Frederick County Zoning Administrator
Date
Final Site Plan Approved by Frederick County Planning Department Reviewer Date
1. Frederick County Zoning Administrator approval expires at five (5) years from the date of site plan approval.
2. Frederick Water approval is valid for three (3) years from date of approval. If construction is not in progress at the end of this period,
Authority approval shall be void.
3. The Frederick County Department of Public Works approval is not enough to begin site development. The owner/contractor must obtain a
Land Disturbance Permit and agree to periodic inspections.
4. The Frederick County Department of Inspections approval does not constitute a building permit. Building plans must be submitted and
approved prior to constructing any structure. Furthermore, the site must meet all ADA requirements and be approved by Inspections.
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UFACTURING
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INSTR 000007195
ZONED: M-1
USE: INDUSTRIAL
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a
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Impervious Area 1 per 2, 000 sf
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AREA 0/ ADDITIONAL PARKING
o r �� I it
MAN DOOR o I \ \\ \ \ (o
1DOOR1111
EX OVERHEAD DOOR
w- MAN DOOR E,
ROOF DRAINEX OVERHEAD DOOR
23MAN DOOR
IGHTP( 2322CE AN DOOR,,-
*--`-_ /�\ MAN DOOR
1420' 20 50,
\v �r//A, j Ex. SWM s, PO\INV=711.5' INV=711.2'INV=711.0,lNV�712.8,
>Tl BUILDING
UFACTURING
66,567 sf
FF= 725.00'
ZIVIC FAMILY, LLC
INSTR 000007195
ZONED: M-1
USE: INDUSTRIAL
cur GUYPP
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INV 7106' --
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Calculation
Parking Stalls 1 per 10 Stalls
40/10 = 4
Impervious Area 1 per 2, 000 sf
Symbol
11
- - - --
- L
-
Quantity
. 1 ' DRAA14GE AND UTIL171Y EASEMENTr,
- .--
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Kousa Dogwood
`\ N 40'29'28" W - 1308.22'
2" Caliper
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B & B O70004315H1es, LLC 40' D' 40'
1EXISTING CONDITIONS
ZONED: \
USE. VACANT GRAPHIC SCALE I
LIGHTING SHALL CONFORM TO FREDERICK COUNTY
ZONING ORDINANCE§ 165-201.07 s. \°
TOP VIEW HOCTION RIZONTAL
..' � Si
All outdoor lighting fixtures shall be designed, shielded, �..
O
LIGHT POLE FIXTURE - FULL CUT-OFF
MODEL # F-ARL-15OW-50K-P5-80
OR EQUIVALENT
Site Data
aimed, located and maintained to shield adjacent
properties and to not produce glare onto adjacent
properties or road rights-of-way. Parking lot fixtures and
light fixtures on buildings shall be full -cutoff fixtures.
Building -mounted or wall -pack lighting fixtures shall not
be mounted more than 25 feet above the finished grade
of the building. These fixtures shall be shielded
(full-cutof>) so that the light source is not visible from
adjacent properties or road rights-of-way. Non -cutoff
wall -pack lighting fixtures shall not be permitted.
Trees Requirement
Calculation
Parking Stalls 1 per 10 Stalls
40/10 = 4
Impervious Area 1 per 2, 000 sf
13,344/2000 = 7
Symbol
11
Green Area in Lot 5Voo of 13,344 = 667 sf 11525-sf
= 10.8% provided
Headlight Screening 180' on each side = 360%4'o. c. = 90 shrubs (see sheet 4 for fence alternative)
Planting Size
Mature
Symbol
Common Name
Botanical Name
LC
Quantity
O
O
Height or Caliper
Height
V
DW
Kousa Dogwood
Cornus Kousa
2" Caliper
25'+
11
Headlight Screening 180' on each side = 360%4'o. c. = 90 shrubs (see sheet 4 for fence alternative)
LANDSCAPING NOTES
1. Miss Utility must be contacted prior to planting. Advise engineer of record of any conflicts in planting locations and
utility markings. Landscaper must stake and guy all trees. Stake locations must a void utilities.
2. Trees and shrubs shall be healthy and free of insect eggs, larvae, and disease. The plants shall have ample roots and
be well branched.
3. The planter shall guarantee all plants for one year.
4. Landscaper shall use shredded mulch in all planting beds and around trees. Tags from each plant will be provided to
the owner.
5. Plant substitutions will be allowed with the written approval of the Frederick County Planning Department.
6. All planting shall conform to with § 165-203.01Bof the Frederick CountyZoning Ordinance. (Plant selection, planting
procedures, and maintenance).
ROUND SMOOTH
POLEBASE
�ffl€
VERTICAL
SECTION
NO TREES, SHRUBS, OR FENCES SHALL BE PLACED
WITHIN ENTRANCE SIGHT LINES
NO TREES, SHRUBS, OR FENCES SHALL BE PLACED
WITHIN FREDERICK WATER EASEMENTS
NO TREES, SHRUBS, OR FENCES SHALL BE PLACED
WITHIN 5' OF UTILITY LINES
2" OF SM -9.5A
6" OF 21-B COMPACTED TO
95% DENSITY
SUBGRADE FREE OF
ORGANICS & COMPACTED
TO 100% DENSITY
TYPICAL LIGHT PAVEMENT SECTION
UNDER PARKING STALLS ONLY
20' 0' 20'
GRAPHIC SCALE
TRAIL�R PARI�I�VGZzE
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43-(19)-8
KRISTEN M/ BUSH
110011035
ZONED: M-1
USE INDUSTRIAL
43-(19)-6
BUSHLAND, LLC
150009595
ZONED. M-1
USE: INDUSTRIAL
WAIVER PER 165-202.0I(D)(3)(c) FOR CURB ( 1 C
AND GUTTER ALONG OUTHERN EDGE OF }
PARKING TO ENABLES EETFLOW CONDITIONS
NECESSARYFOR?DRYSWALEBMP
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Planting Size
Mature
O
Symbol
Common Name
Botanical Name
LC
Quantity
O
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Height or Caliper
Height
V
BW
Common Boxwood
Buxus sempervirens
36" Tall
5'+
90
LANDSCAPING NOTES
1. Miss Utility must be contacted prior to planting. Advise engineer of record of any conflicts in planting locations and
utility markings. Landscaper must stake and guy all trees. Stake locations must a void utilities.
2. Trees and shrubs shall be healthy and free of insect eggs, larvae, and disease. The plants shall have ample roots and
be well branched.
3. The planter shall guarantee all plants for one year.
4. Landscaper shall use shredded mulch in all planting beds and around trees. Tags from each plant will be provided to
the owner.
5. Plant substitutions will be allowed with the written approval of the Frederick County Planning Department.
6. All planting shall conform to with § 165-203.01Bof the Frederick CountyZoning Ordinance. (Plant selection, planting
procedures, and maintenance).
ROUND SMOOTH
POLEBASE
�ffl€
VERTICAL
SECTION
NO TREES, SHRUBS, OR FENCES SHALL BE PLACED
WITHIN ENTRANCE SIGHT LINES
NO TREES, SHRUBS, OR FENCES SHALL BE PLACED
WITHIN FREDERICK WATER EASEMENTS
NO TREES, SHRUBS, OR FENCES SHALL BE PLACED
WITHIN 5' OF UTILITY LINES
2" OF SM -9.5A
6" OF 21-B COMPACTED TO
95% DENSITY
SUBGRADE FREE OF
ORGANICS & COMPACTED
TO 100% DENSITY
TYPICAL LIGHT PAVEMENT SECTION
UNDER PARKING STALLS ONLY
20' 0' 20'
GRAPHIC SCALE
TRAIL�R PARI�I�VGZzE
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BUSHLAND, LLC
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ZONED. M-1
USE: INDUSTRIAL
WAIVER PER 165-202.0I(D)(3)(c) FOR CURB ( 1 C
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DATE: MARCH 25, 2020
SCALE: As Shown
FILE NO. 0127
SHEET 2 OF 4
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DATE: MARCH 25, 2020
SCALE: As Shown
FILE NO. 0127
SHEET 2 OF 4
E & S CONTROL STANDARDS
1. Permanent or temporary soil stabilization shall be applied to denuded
areas within seven days after final grade is reached on any portion of the
site. Temporary soil stabilization shall be applied within seven days to
denuded areas that may not be at final grade but will remain dormant for
longer than 30 days. Permanent stabilization shall be applied to areas that
are to be left dormant for more than one year.
2. During construction of the project, soil stockpiles and borrow areas shall
be stabilized or protected with sediment trapping measures. The applicant
is responsible for the temporary protection and permanent stabilization of
all soil stockpiles on site as well as borrow areas and soil intentionally
transported from the project site.
3. A permanent vegetative cover shall be established on denuded areas not
otherwise permanently stabilized. Permanent vegetation shall not be
considered established until a ground cover is achieved that is uniform,
mature enough to survive and will inhibit erosion.
4. Sediment basins and traps, perimeter dikes, sediment barriers and other
measures intended to trap sediment shall be constructed as a first step in
any land -disturbing activity and shall be made functional before upstream
land disturbance takes place.
5. Stabilization measures shall be applied to earthen structures such as
dams, dikes and diversions immediately after installation.
6. Sediment traps and sediment basins shall be designed and constructed
based upon the total drainage area to be served by the trap or basin.
a. The minimum storage capacity of a sediment trap shall be 134 cubic
yards per acre of drainage area and the trap shall only control drainage
areas less than three acres.
b.Surface runoff from disturbed areas that is comprised of flow from
drainage areas greater than or equal to three acres shall be controlled by
a sediment basin. The minimum storage capacity of a sediment basin
shall be 134 cubic yards per acre of drainage area. The outfall system
shall, at a minimum, maintain the structural integrity of the basin during a
twenty-five year storm of 24-hour duration. Runoff coefficients used in
runoff calculations shall correspond to a bare earth condition or those
conditions expected to exist while the sediment basin is utilized.
7. Cut and fill slopes shall be designed and constructed in a manner that
will minimize erosion. Slopes that are found to be eroding excessively
within one year of permanent stabilization shall be provided with additional
slope stabilizing measures until the problem fs corrected.
8. Concentrated runoff shall not flow down curt or fill slopes unless
contained within an adequate temporary or permanent channel, flume or
slope drain structure.
9. Whenever water seeps from a slope face, adequate drainage or other
protection shall be provided.
10. All storm sewer inlets that are made operable during construction shall
be protected so that sediment -laden water cannot enter the conveyance
system without first being filtered or otherwise treated to remove sediment.
11.Before newly constructed stormwater conveyance channels or pipes are
made operations., adequate outlet protection and any required temporary
or permanent channel lining shaft be installed in both the conveyance
channel and receiving channel.
12. When work in a live watercourse is performed, precautions shall be
taken to minimize encroachment, control sediment transport and stabilize
the work area to the greatest extent possible during construction.
Nonerodible material shall be used for the construction of causeways and
cofferdams. Earthen fill may be used for these structures if armored by
nonerodible cover materials.
13. When a live watercourse must be crossed by construction vehicles more
than twice in any six-month period, a temporary vehicular stream crossing
constructed of nonerodible material shall be provided.
14. All applicable federal, state and local regulations pertaining to working
in or crossing live watercourses shall be met.
15. The bed and banks of a water course shall be stabilized immediately
after work in the watercourse is completed.
16. Underground utility lines shall be installed in accordance with the
following standards fn addition to other applicable criteria:
a. No more than 500 linear feet of trench may be opened at one time.
b. Excavated material shall be placed on the uphill side of trenches.
c. Effluent from dewatering operations shall be filtered or passed through
an approved sediment trapping device, or both, and discharged in a
manner that does not adversely affect flowing streams or off-site property.
d. Material used for backfilling trenches shall be properly compacted in
order to minimize erosion and promote stabilization.
e. Restabilization shall be accomplished in accordance with these
regulations.
f.Applicable safety regulations shall be complied with.
17. Where construction vehicle access routes intersect paved or public
roads, provisions shall be made to minimize the transport of sediment by
vehicular tracking onto the paved surface. Where sediment is transported
onto a paved or public road surface, the road surface shall be cleaned
thoroughly at the end of each day. Sediment shall be removed from the
roads by shoveling or sweeping and transported to a sediment control
disposal area. Street washing shall be allowed only after sediment is
removed in this manner. This provision shall apply to individual
development lots as well as to larger land -disturbing activities.
18.A11 temporary erosion and sediment control measures shall be removed
within 30 days after final site stabilization or after the temporary measures
are no longer needed, unless otherwise authorized by the local program
authority. Trapped sediment and the disturbed soil areas resulting from the
disposition of temporary measures shall be permanently stabilized to
prevent further erosion and sedimentation.
19. Properties and waterways downstream from development sites shall be
protected from sediment deposition, erosion and damage due to increases
in volume, velocity and peak flow rate of stormwater runoff for the stated
frequency storm of 24-hour duration in accordance with the following
standards and criteria:
SEEDING SCHEDULE
(Section 3.32 of VESH)
1.)Topsoil will be spread at a minimum depth of 4 ".
2.)Pulverized agricultural limestone will be incorporated into the soil at a rate
of 92 lbs per 1000 square feet (2 tons per acre).
3.)Fertllize with 10-10-10 at a rate of 23 lbs per 1000 square feet (1000 lbs
per acre).
4.)Seed mix will consist of 67910 Kentucky 31 Tall fescue and 339yo Red
Clover.
S)Straw mulch will be applied to all seeded areas at the rate of 3500 lbs per
acre and anchored with cutback, or emulsified asphalt applied at a rate of 200
gallons per acre.
E & S CONTROL NARRATIVE
Project Description
This site is located behind the existing ZM Sheetmetal manufacturing facility. The
facility is in need of additional parking and this lot is proposed behind the existing
parking lot. The area of disturbance is 0.54 acres. Since the new parking lot is
part of the larger development, a "Dry Swale" BMP will be placed next to the new
parking lot.
Existing Site Conditions
This site has been kept mowed for several years and is does not drain into the
existing stormwater facility. This area drains through existing easements an into
Redbud Run.
Adjacent Parcels
The adjacent parcels are large lot industrial uses
Off -Site Areas
No off site areas will occur.
Soils
There is one soil type under this parking lot as determined from the USDA's "Soils
Survey of Frederick County, VA. " (#39B) Swimley Silt Loams. This site is
classified as a hydrologic soils group C. These soils have medium erodibility and
runoff.
Geology
This area is known for karst conditions; however, no signs of sinkholes or rock
outcroppings are present for this area. Since the development is mainly the
removal of topsoil and placement of stone and asphalt, compaction of the clay
layer will be sufficient.
Critical Areas
No critical areas present.
Erosion Control Measures
. Install construction entrance with wash rack, if needed
. Install diversion dikes and silt fence
. Install the inlet and outlet protection
. Grade site and apply compacted gravel to stabilize areas or building and parking
. Grade remaining site and install utilities. Seed and stabilize exposed surfaces
immediately upon reaching final grade
Permanent Stabilization
Upon reaching final grade, seed and straw (or hydro -seed) the exposed areas. Silt
and other measures may be removed when 85% of the bare ground has a stand
of grass.
General Erosion and Sediment Control Notes (VESH Table 6-1)
ES -1. Unless otherwise indicated, all vegetative and structural erosion and sediment
control practices will be constructed and maintained according to minimum
standards and specifications of the Virginia Erosion and Sediment Control Handbook
and Virginia Regulations 4VAC50-30 Erosion and Sediment Control Regulations.
ES-2'The plan approving authority must be notified one week prior to the
pre -construction conference, one week prior to the commencement of land
disturbing activity, and one week prior to the final inspection.
ES -3. All erosion and sediment control measures are to be placed prior to or as
the first step in clearing.
ES -4. A copy of the approved erosion and sediment control plan shall be
maintained on the site at all times.
ES -5. Prior to commencing land disturbing activities in areas other than indicated
on these plans (including, but limited to, off-site borrow or waste areas), the
contractor shall submit a supplementary erosion control plan to the owner for
review and approval by the plan approving authority.
ES -6. The contractor is responsible for installation of any additional erosion control
measures necessary to prevent erosion and sedimentation as determined by the
plan approving authority.
ES -7. All disturbed areas are to drained to approved sediment control measures at
all times during land disturbing activities and during site development until final
stabilization is achieved.
ES -8. During dewatering operations, water will be pumped into an approved
filtering device.
ES -9. The contractor shall inspect all erosion control measures periodically and
after each runoff -producing rainfall event. Any necessary repairs or cleanup to
maintain the effectiveness of the erosion control devices shall be made
immediately.
Frederick County Note:
The Public Works and Engineering Department will retain the right to add to or
modify these erosion and sediment control measures during the construction
process, within reason, to ensure adequate protection to the public and
environment.
SYMBOL
E & S DEVICE
QUANTITY
LCG
LIMITS OF CLEARING & GRADING
0.54 ac
PS
PERMANENT SEEDING
10.12 ac
SF
WIRE SUPPORTED SILT FENCE
325 ft
IP
INLET PROTECTION
1 each
OP
OUTLET PROTECTION
2 each
CODE
SOIL NAME
HYDROLOGIC
oLC
GROUP
39B
SWIMLEYSILTLOAMS
C
1\
1 43-((19))-33
VIRGINIA RIGGERS l
HOLDINGS, LLC \
110006156
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UTILITY EASEMENT \
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SCALE: 1"=20'
FILE NO. 0127
SHEET 3 OF 4
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DATE: MARCH 25, 2020
SCALE: 1"=20'
FILE NO. 0127
SHEET 3 OF 4
CONSTRUCTION OF A SILT FENCE
(WITH WIRE SUPPORT)
1. SET POSTS AND EXCAVATE A 4'%4' 2. STAPLE WIRE FENCING TO THE POSTS.
TRENCH UPSLOPE ALONG THE LINE
OF POSTS.
STONE CONSTRUCTION ENTRANCE
70' MIN. E%ISTINO
PAVE�NT
00,
FLOW
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
FILTER FABRIC
n-
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SOURCE: Adapted from TaAdation of Strew and Fabric Filter BuTim for Sediment GontTuL FUM &05-1
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MOUNTABLE BERM
mPTIDNAU
MIN.
EXISTING
PAVEMENT
10' MIN
SECTION A -A
OUTLET PROTECTION
SECTION B -B
CULVERT
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WIDTH(A)
APRON LENGTH
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specifying that the maximum excavation depth of the sediment tra basin at the construction
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1 -year event = 0.56 cis, (1,145 Cu. ft.)
stage must (1) be at /east 1 foot above the depth of the post -construction Dry Swale installation,
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2 -year event = 0.85 cfs, (1, 694 cu, ft.)
(2) contain an underdrain, and (3) specify the use of proper procedures for conversion from a
O
10 year event = 1.70 cis (3,422 CU. ft.)
temporary practice to a permanent one, including de -watering, cleanout and stabilization.
Post -Development Flowra
8.1. Construction Sequence
The followin is a typical construction sequence toproperlyinstall a D Swale although the steps
9 tYP 9 Dry 9 P
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1 ear event = 1.23 cfs 496 cu. ft.
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2 -year event = 1.60 cis, (3,276 cu. ft.)
Step 1: Protection during Site Construction. As noted above, Dry Swales should remain outride
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the limit of disturbance during construction to prevent soil compaction b heavy equipment However
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these cases, temporary E&S controls such as dikes, silt fences and other similar measures should be
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integrated into the Swale design throughout the construction sequence. Specifically, barriers should be
The water flows into the d Swale and must migrate out the 6" perforated pipe
dry 9 P P P
installed at key check dam locations, erosion control fabric should be used to protect the chane;
and excavation should be no deeper than 2 feet above the proposed invert of the bottom of the
m
t0 flow back into the drainage shed. The flowrate reduction is:
planned underdrain. Dry Swales that lack underdrams (and rely on filtration) must be fully protected
by silt fence or construction fencing to prevent compaction by heavy equipment during construction.
1 -year event = 0.00 cfs, (1,668 cu. ft.)
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2 -year event = 0.00 cfs, (2,161 Cu, ft.)
•... •. •!•
10 -year event= 0.27 cfs, (2,975 cu. ft.)
vegetation. The designer should check the boundaries of the contributing drainage area to ensure it
conforms to original design. Additional E&5 controls maybe needed during Swale construction,
Energy Balance Equation - (1 -year storm)
particularly to divert stormwater from the Dry Swale until the filter bed and side slopes are fully
stabilized. Pre-treatment cells should be excavated first to trap sediments before they reach the
T •'
(Q -post) < Q -pre x (RV-pre/RV-post)
planned filter beds.
Step 3. Excavators or backhoes should work from the sides to excavate the Dry Swale area to the
0.00 <0.566 x (1145/2496)
appropriate design depth and dimensions. Excavating equipment should have scoops with adequate
reach so they do not have to sit inside the footprint of the Dry Swale area.
0.00 < 0.26 requirements are met.
Step 4• The bottom of the Dry Swale should be ripped, roto -tilled or otherwise scarified to promote
greater infiltration.
00,
FLOW
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
FILTER FABRIC
n-
WIRE
SOURCE: Adapted from TaAdation of Strew and Fabric Filter BuTim for Sediment GontTuL FUM &05-1
�Tnmd ! h•ot
MOUNTABLE BERM
mPTIDNAU
MIN.
EXISTING
PAVEMENT
10' MIN
SECTION A -A
OUTLET PROTECTION
SECTION B -B
CULVERT
SIZE
Q -10 -YR
VELOCITY
WIDTH(A)
APRON LENGTH
DEPTH(d)
STONE
1
18"
5.8 cfs
8.8 ft/S
4.5'
14'
9"
6"
2
6"
0.2 cfs
1.1 ft/s
1.5'
6'
9"
6"
TREAT WITH SEALANT.
TYPICAL 36" TALL PICKETS INSTALLED ON 4'X4'X5'
TREATED POSTS SET 24" DEEP.
ALTERNATIVE HEADLIGHT
SCREENING FENCE DETAIL
N. T.S.
32B
6C
SOILS MAP - 1 "=400'
34
148
32B
16C
39C
5B
CULVERT INLET SEDIMENT TRAP
'STORAGE REQUIREMENTS EQUIVALENT
TO THAT OF TEMPORARY SEDIMENT
TRAP, STD. & SPEC. 3.13
67 C.Y
(BELOW/&ACRE WET STOWE
SEOF STONE) PERSPECTIVE VIEW
67 C.Y. ACRE CRY STORAGE
(BASE F STONE TO TOP
OF STONE BERM) PIPE INVERT NATURAL GROUND
- 704.14'
RIPRAP HEADWALL
MELS TO BE DISTURBED
(CUT. FILLED, ETC.)
Dey Storage
266 cu. yd..
Wet Storage
268 cu. yd..
Y 30'CMP
r FLOW
`CLASS I RIPRAP
VDGT F3. //357. OR /5 COARSE AGGREGATE
UEAN OUT PO
AT 1/2 VOLUME OF WErC STORAGE AREA
ELEVATION
PIPE OUTLET CONDITIONS
T
3do (MIN.)
'IPE OUTLET TO WELL
)EFINED CHANNEL
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I.�`a..•.a .�Ia.�aa ��W�i�a��"t\'=41111
• 1 B• . • r • r_iw .8E • • N r • H• L.r R•
• ••• L L •T.... ..uuaT• •r•.•
L E
T..T L a., � r E .a 61• •
I 1
♦• 1 i
Surface area =
jInstall 6' wide
/ Geotex 351 or
equivalent
�FXWr,.1
Prune codominont
Prune rubbing or
cross branches
Remove tags and labels_
Cut away all balling ropes
Remove top of wire basket
'- DO NOT prune terminal
leader or branch tips
Prune narrow crotch
angles & water spouts
-Prune broken branches
Prune suckers
2=J" mulch kept
P
away from trunk
Soil well to
,-contain water
much burtap as possible if Leave solid soil pedestal - do not
fiekl-grown dig deeper than boll depth
1 Dig hole 2-3 times root ball width
TREE PLANTING DETAIL
(NOT TO SCALE)
72.
720
715
NElyLO� '
.c
3 m
c �
o a
R m Q W Zo
0+00 0+50 1+00
50' 0' S0'
GRAPHIC SCALE
/1J
8.75'
"' Soil Mix
Pea Gra vel
Underdrain
"' #57's - sump
Dry Swale Cross -Section
STORMWATER QUANTITY ANALYSIS
Backfill soil
C)
o�
Partially backfill,
8.1. Construction sequence
water tsettle
Widen and score cs�
soil, finish
ho/es in wall
impervious area t0 0.34 acres with 0.20 acres remaining in grass,
fencing, particularly if they will provide an infiltration function (i.e., have no underdrams). Ideal/y,
backfilling
SS
for water
Remove container and cut '
�a (Pipe
circling roots if
or tile could
=tainer-gmwn, or as
be installed)
much burtap as possible if Leave solid soil pedestal - do not
fiekl-grown dig deeper than boll depth
1 Dig hole 2-3 times root ball width
TREE PLANTING DETAIL
(NOT TO SCALE)
72.
720
715
NElyLO� '
.c
3 m
c �
o a
R m Q W Zo
0+00 0+50 1+00
50' 0' S0'
GRAPHIC SCALE
/1J
8.75'
"' Soil Mix
Pea Gra vel
Underdrain
"' #57's - sump
Dry Swale Cross -Section
■
STORMWATER QUANTITY ANALYSIS
DRY SWALE CONSTRUCTION
C)
o�
Project area is 0.54 acres. Of this 0.04 acres are impervious and 0.50 acres are
8.1. Construction sequence
�
covered in grass. When complete, the new parking lot will/ increase the
Construction Stage ESC Controls . DrySwales should be fully protected by silt fence or construction
impervious area t0 0.34 acres with 0.20 acres remaining in grass,
fencing, particularly if they will provide an infiltration function (i.e., have no underdrams). Ideal/y,
This site is located at the intersection Of McGhee Road and Welltown Road in
Dry Swale areas should remain outside the limits of disturbance during construction to prevent soil
companion by heavy equipment.
Stonewall Industrial Park. The project will develop a 22, 000 sf building with a
LAv
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a
ravel storage yard.
9 9 Y
D Swale locations may be used for small sediment traps or basins during construction.
Dry Y P 9
C
0
Q
However, these must be accompanied by notes and graphic details on the E&.S Control plan
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Existing Flowrates
specifying that the maximum excavation depth of the sediment tra basin at the construction
P P/
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1 -year event = 0.56 cis, (1,145 Cu. ft.)
stage must (1) be at /east 1 foot above the depth of the post -construction Dry Swale installation,
`�
2 -year event = 0.85 cfs, (1, 694 cu, ft.)
(2) contain an underdrain, and (3) specify the use of proper procedures for conversion from a
O
10 year event = 1.70 cis (3,422 CU. ft.)
temporary practice to a permanent one, including de -watering, cleanout and stabilization.
Post -Development Flowra
8.1. Construction Sequence
The followin is a typical construction sequence toproperlyinstall a D Swale although the steps
9 tYP 9 Dry 9 P
O0)
may be modified to adapt to different site conditions.
Y P
1 ear event = 1.23 cfs 496 cu. ft.
Y .2(. )
�ti
2 -year event = 1.60 cis, (3,276 cu. ft.)
Step 1: Protection during Site Construction. As noted above, Dry Swales should remain outride
O
to
- -
10 ear event - 2.61 cis, 5 484 cu. ft.
Y r(, )
the limit of disturbance during construction to prevent soil compaction b heavy equipment However
9 P P Y Y
N
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O
this is seldom practical given that Swales are a key part of the drainage system at most sites. In
o
'0
Dry Swale RDUtMg
these cases, temporary E&S controls such as dikes, silt fences and other similar measures should be
�
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integrated into the Swale design throughout the construction sequence. Specifically, barriers should be
The water flows into the d Swale and must migrate out the 6" perforated pipe
dry 9 P P P
installed at key check dam locations, erosion control fabric should be used to protect the chane;
and excavation should be no deeper than 2 feet above the proposed invert of the bottom of the
m
t0 flow back into the drainage shed. The flowrate reduction is:
planned underdrain. Dry Swales that lack underdrams (and rely on filtration) must be fully protected
by silt fence or construction fencing to prevent compaction by heavy equipment during construction.
1 -year event = 0.00 cfs, (1,668 cu. ft.)
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2 -year event = 0.00 cfs, (2,161 Cu, ft.)
Step 2. Installation may only begin after the entire contributing drainage area has been stabilized by
10 -year event= 0.27 cfs, (2,975 cu. ft.)
vegetation. The designer should check the boundaries of the contributing drainage area to ensure it
conforms to original design. Additional E&5 controls maybe needed during Swale construction,
Energy Balance Equation - (1 -year storm)
particularly to divert stormwater from the Dry Swale until the filter bed and side slopes are fully
stabilized. Pre-treatment cells should be excavated first to trap sediments before they reach the
(Q -post) < Q -pre x (RV-pre/RV-post)
planned filter beds.
Step 3. Excavators or backhoes should work from the sides to excavate the Dry Swale area to the
0.00 <0.566 x (1145/2496)
appropriate design depth and dimensions. Excavating equipment should have scoops with adequate
reach so they do not have to sit inside the footprint of the Dry Swale area.
0.00 < 0.26 requirements are met.
Step 4• The bottom of the Dry Swale should be ripped, roto -tilled or otherwise scarified to promote
greater infiltration.
STORMWA TER ANALYSIS
QUALITY
Steps Place an acceptable filter fabric on the underground (excavated) sides of the dry Swale with
a minimum 6 inch overlap. Place the stone needed for storage layer over the filter bed. Perforate
the underdrain pipe and check its slope. Add the remaining stone jacket, and then pack #57 stone
Design Decision
to 3 inches above the top of the underdrain, and then add 3 inches of pea gravel as a filter layer
Due the small size of the proposed parking lot and location, a level 2 dry Swale
shall be utilized for the BMP. Since there is an existing parking lot and building,
Step 6. Add the soil media in 12 -inch 1/lis until the desired top elevation of the Dry Swale is
the Virginia Runoff Reduction Method for ReDevelopment is Used.
achieved. Wait a few days to check for settlement, and add additional media as needed.
Step 7. Install check dams, driveway culverts and internal pre-treatment features, as specified in the
plan.
Pre-ReDevelopment Conditions
Step 8. Prepare planting holes for specified trees and shrubs, install erosion control fabric where
725
The 0.54 acres is within the hydrologic soils group C.
needed, spread seed or lay sod, and install any temporary irrigation.
0.04 acres are impervious
Step 9. Plant landscaping materials as shown in the landscaping plan, and water them weekly during
0.50 acres are managed turf
the first 2 months. The construction contract should include a care and replacement warranty to
ensure that vegetation is properly established and survives during the first growing season following
Post-ReDevelopment Conditions
construction.
720
0.34 acres are impervious
Step 10. Conducta final construction Inspection and develop a punchlist for facility acceptance.
0.20 acres are managed turf
8.3. Construction Inspection
Inspections are needed during construction to ensure that the Dry Swale practice is built /n
Phosphorous Load Reduction required is 0.55 Ib/yr
accordance with these specifications. Detailed inspection checklists should be used that include
sign -offs by qualified individuals at critical stages of construction, to ensure that the contractor's
The proposed Dry Swale Will also act as the stOrmWd ter management.
interpretation of the plan is consistent with the designer's intent. An example construction phase
inspection checklist for Dry Swales can be accessed at the CWP website at:
715
This pond will remove 0.64 lbs/yr meeting the requirements.
http://www.cwp•ory1Resource_Library/Controlling_Runoff and Discharges/sm.htm
(scroll to Tool& Plan Review, BMP construction, and Maintenance Checklists)
Some common pitfalls can be avoided by careful construction supervision that focuses on the
DRY SWALE DESIGN (LEVEL 2)
following
• ecktheaspects o ediatocodry Swale nfir thiti
Check the filter media to confirm that it meets specifications and is installed to the correct
depth.
• Check elevations such as the invert of the underdrain, inverts for the inflow and outflow
points, and the ponding depth provided between the surface of the filter bed and the overflow
6.1 Sizin
structure.
Dry Swale Treatment volume = Tv = 1,332 Cu.ft. (provided from VRRM Spreadsheet)
Ensure that caps are placed on the upstream (but not the downstream) ends of the
Storage Depth= (1.0'x 1) + (2.0'x.25) + (1.25'x.4) = 2.00'
underdrains.
Leve/ 2 - SA = 1.1 (Tv) /Storage Depth= 1.1 x 1332 / 2 = 733 Sf min
Make sure the desired coverage of turf or erosion control fabric has been achieved following
construction, both on the filter beds and their contributing side -slopes.
Inspect check dams and pre-treatment structures to make sure they are properly installed and
Surface Area Provided = 1703 sf
working effectively.
Check that outfall protection/energy dissipation measures at concentrated inflow and outflow
points are stable.
6.2 Soil Infiltration Rate Testing:
Not required since underdrain is being utilized.
The real test of Dry Swale occurs after its first big storm. The post -storm inspection should occur
on whether the desired sheetilow, shallow concentrated flows or fully concentrated flows assumed in
the plan actually occur in the field. Also, inspectors should check that the Dry Swale drains
6.3 Dry Swale Geometry:
completely within minimum 6 hour drawdown period. Minor adjustments are normally needed as a
1:15 parabolic shape utilized With 3.'1 slope to top Of media.
result of this post -storm Inspection (e.g., spot reseeding, gully repair, added armoring at inlets or
Media width is 8; therefore, check dams and berms are not required.
ouffails, and check dam realignment.
6.4 Pretreatment:
Gra vel and grass filter strip between the parking lot and dry Swale is utilized.
6.5 Conveyance and Overflow:
DRY SWALE MAINTENANCE
Minimum slope of less than 0.5%
9.1. Maintenance Agreements
Velocity in Swale less than 0.5 fVs
Overflow will drain into existing natural drainage Swale on 100 -yr storms
Section 4 VAC 50-60-124 of the regulations specifies the circumstances under which a
6.6 Filter Media: (per Bioretention Standard)
maintenance agreement must be executed between the owner and the local program. This section
85%-88% sand
sets forth inspection requirements, compliance procedures if maintenance is neglected, notification
8%-12% Soil fines
of the local program upon transfer of ownership, and right -of --entry for local program personnel.
3%-5% organic matter in the form of leaf compost
9.1. Maintenance Ins ections
Install 110% of the plan volume to account for settlement
Annua inspections are used to trigger maintenance operations such as sediment removal, spot
DO not Compact.
revegetation and inlet stabilization. The following is a list of several key maintenance inspection
paints:
6.7 Underdrain and Underground Storage
• Add reinforcement planting to maintain 95% turf cover or vegetation density. Reseed any
salt -killed vegetation.
Install 12" of #57s below the invert of the underdrain.
Remove any accumulated sand or sediment deposits on the filter bed surface or in
Install 6" of #57s along the sides to the top of pipe.
pretreatment cells.
Install minimum 3" Of ea ravel over underdrain and #57s
P 9
Inspect upstream and downstream of check dams for evidence of undercutting or erosion, and
remove trash or blockages at weepholes.
Contributing area is less than 1 acre; therefore, a cleanout is only required at the
Examine filter beds for evidence of braiding, erosion, excessive ponding or dead grass.
ends.
Check inflow points for clogging, and remove any sediment.
• Inspect side slopes and grass filter strips for evidence of any rill or gully erosion, and repair
6.8 Landscaping Plan
as needed.
• look for any bare soil or sediment sources in the contributing drainage area, and stabilize
Install 3" of clean, screened topsoil prior installing turf or hydro -seeding,
immediately.
Ideally, inspections should be conducted in the spring of each year. Example maintenance
inspection checklists for Dry Swales can be accessed in Appendix C of Chapter 9 of the Virginia
Stormwater Management Handbook (2010) or at CWP website at.,
http://www.cwp.orq/Resource-Library/Controlling Runoff and Dischares/sm.htm
(scroll to Tool& Plan Review, BMP Construction, and Maintenance Checklists)
ng the remainder of the first growing season (April - October), depending on rainfall.
9.3. Routine Maintenance and Operations
Once established, Dry Swales have minimal maintenance needs outride of the spring clean up,
regular mowing, and pruning and management of trees and shrubs. The surface of the filter bed can
become clogged with fine sediment overtime, but this can be alleviated through core aeration or
deep tilling of the filter bed. Additional effort may be needed to repair check dams, stabilize inlet
points, and remove deposited sediment from pre-treatment cells.
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FILE NO. 0127
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SCALE: As Shown
FILE NO. 0127
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