HomeMy WebLinkAboutSP-22-019 - Supplemental - 0055 Green Mountain Drive (9)STS
WW WGG
S
OE OE OE OES
GREEN MOUNTAIN DR.VERMONT COMMONS
SCHOOL
n/f
VERMONT COMMONS
SCHOOL
n/f
RAVA LLC
n/f
THE HERITAGE AUTOMOTIVE
GROUP INC.
n/f
THE HERITAGE
AUTOMOTIVE GROUP
INC.
n/f
UVM & STATE
AGRICULTURAL COLLEGE
C/O CAMPUS PLANNING
SERVICES
2072
1
1 2122132082
0
9 210214202203201204205206DSM
DSM
MAB
1" = 40'
22101
C0.0
03/18/2022
LOCATION MAP
1" = 2000'
VERMONT
COMMONS SCHOOL
75 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
SITE
IMPROVEMENTS
OVERALL EXISTING
& PROPOSED
CONDITIONS
PLAN
PROJECT
LOCATION
A
C
CIVIL ENGINEERING ASSOCIATES, INC.
E
10 MANSFIELD VIEW LANE, SOUTH BURLINGTON, VT 05403
P: 802-864-2323 FAX: 802-864-2271 web: www.cea-vt.com
7
LEGEND
G
ST
W
EXISTING CONTOUR
EXISTING CURB
EXISTING PAVEMENT
EXISTING GAS
EXISTING STORM
EXISTING WATER
EXISTING SEWER MANHOLE
EXISTING CATCH BASIN
EXISTING HYDRANT
EXISTING SHUT OFF
APPROXIMATE PROPERTY LINE
S
55 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
NOTES
1.UTILITIES SHOWN DO NOT PURPORT TO CONSTITUTE OR REPRESENT ALL
UTILITIES LOCATED UPON OR ADJACENT TO THE SURVEYED PREMISES.
EXISTING UTILITY LOCATIONS ARE APPROXIMATE ONLY. THE CONTRACTOR
SHALL FIELD VERIFY ALL UTILITY CONFLICTS. ALL DISCREPANCIES SHALL BE
REPORTED TO THE ENGINEER. THE CONTRACTOR SHALL CONTACT DIG SAFE
(888-344-7233) PRIOR TO ANY CONSTRUCTION.
2.PROPERTY LINE INFORMATION IS APPROXIMATE AND BASED ON EXISTING TAX
MAP INFORMATION. THIS PLAN IS NOT A BOUNDARY SURVEY AND IS NOT
INTENDED TO BE USED AS ONE.
3.SITE INFORMATION IS BASED ON A FIELD SURVEY PERFORMED BY CIVIL
ENGINEERING ASSOCIATES, INC MARCH 2022. CIVIL ENGINEERING ASSOCIATES,
INC. SURVEY ORIENTATION IS "GRID NORTH", VERMONT COORDINATE SYSTEM
OF 1983 (HORIZONTAL) AND NAVD88 (VERTICAL) ESTABLISHED FROM GPS
OBSERVATIONS ON SITE.P:\AutoCADD Projects\2022\22101-Vermont Commons\1-CADD Files-22101\dwg\22101 - Site.dwg, C0.0, 3/18/2022 11:27:17 AM65 Green Mountain Drive - UVM
See Sheet C1.0 for Detailing
of the Proposed Path
Connection.
55 Green Mountain Drive
Vermont Commons School
75 Green Mountain Drive
ST
STS
WWW W WGGG
EXIST. XFMR
EXIST. GENERATOR
EXIST. XFMR
EXIST. UTIL. BOXES
S
EXIST.
UTIL.
BOX
EXIST.
MAIL BOX
EXIST.
UTIL.
BOX
PROPOSED SIDEWALK
PROPOSED SIDEWALK
PROPOSED
CROSSWALK
S=0.013
PROPOSED
CROSSWALKST15" AC
INV=207.9
GREEN MOUNTAIN DR.T
EXIST. BUILDING
(16,771 S.F.)
T
ST
ST
18" PINE
16" MAPLE 18" PINE
20" PINE
22" OAK
22" OAK
OE OE OE OE OE
THRESHOLD=212.8
216215214213212211211210
210
210 209209209
209209208 208208
2
0
8 207207206
2062
0
5
2044" CRAB
FFE ALUM=211.2
FFE CARPET=211.1LOADING DOCK
ELEV.=211.2
EX CB#3
RIM=209.3
EX CB#1
RIM=205.3
8" MAPLE
3" CRAB
8" CEDAR
6" CEDAR
42" LOCUST
(4)LOCUST
8"-14"
8" SPRUCE GATEEX CB#2
RIM=206.8
206.6 +
207.6 +
210.
7
+
211.2
+
+ 208.3
+ 210.0
REMOVE CURB AT
CROSSWALK
TAPER CURB PER DETAIL
208.0+
207.4+
ABANDONED
212
213
2
1
1
207208209207
207
209210PROPOSED 5' WIDE
SIDEWALK
S=0.015
REMOVE EXISTING
SIDEWALK
INSTALL 4" TOPSOIL
SEED AND MULCH IN
NEW LAWN AREAS
PROPOSED SIDEWALK
MATCH EX. WIDTH
S=0.03
+2
1
1
.
1
S
EX SMH#1
RIM=204.7
EX SMH#1
RIM=209.3
RELOCATED EX.
NO PARKING SIGN
MATCH EX. GRADE
AND WIDTHS=0.016EXISTING TREE
TO BE REMOVED
VERMONT COMMONS
SCHOOL
n/f
VERMONT COMMONS
SCHOOL
n/f
RAVA LLC
n/f
THE HERITAGE AUTOMOTIVE
GROUP INC.
n/f
THE HERITAGE
AUTOMOTIVE GROUP
INC.
n/f
UVM & STATE
AGRICULTURAL COLLEGE
C/O CAMPUS PLANNING
SERVICES
210
FFE ALUM=211.2
+ 208.3
209210211.0
210.96
210.86
5.3' @ 2%
211.1
7'x5"
LANDING 2%2%
7'x5"
LANDING
2%
2%
5' CLR
1:12RAMP+ 208.3
7'
208.79
208.89
208.93
209.03
208.25
208.35
3%
EX. LIGHT POLE
EX. AWNING
211210210
209
PROPOSED HANDRAIL
PER DETAIL C2.0
OE OE OE OE OE
211
210
3" CRAB
42" LOCUST
+ 207.7209 207.8
5'x7'
LAN
D
I
N
G
2%2%
+ 207.9
207.66
210
.
2
+
211
210
209
20820
8
209
209.
8
+
210.02
210.16
RAMP1:12209.92
210.06
S
EX SMH#1
RIM=209.3
5'x7'
LANDING
2%2%
RELOCATED EX.
NO PARKING SIGN
2112102092:1209210
208208EXISTING TREE
TO BE REMOVED
PROPOSED HANDRAIL
PER DETAIL C2.0
5' CLR
7'
DSM
DSM
MAB
1" = 30'
22101
C1.0
03/18/2022
LOCATION MAP
1" = 2000'
VERMONT
COMMONS SCHOOL
75 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
SITE
IMPROVEMENTS
EXISTING &
PROPOSED
CONDITIONS
PLAN
PROJECT
LOCATION
A
C
CIVIL ENGINEERING ASSOCIATES, INC.
E
10 MANSFIELD VIEW LANE, SOUTH BURLINGTON, VT 05403
P: 802-864-2323 FAX: 802-864-2271 web: www.cea-vt.com
7
LEGEND
G
ST
W
EXISTING CONTOUR
EXISTING CURB
EXISTING PAVEMENT
EXISTING GAS
EXISTING STORM
EXISTING WATER
EXISTING SEWER MANHOLE
EXISTING CATCH BASIN
EXISTING HYDRANT
EXISTING SHUT OFF
APPROXIMATE PROPERTY LINE
S
55 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
LOCUST MAP
SCALE: 1" = 100'
SITE PLAN
SCALE: 1" = 30'
NOTES
1.UTILITIES SHOWN DO NOT PURPORT TO CONSTITUTE OR REPRESENT ALL
UTILITIES LOCATED UPON OR ADJACENT TO THE SURVEYED PREMISES.
EXISTING UTILITY LOCATIONS ARE APPROXIMATE ONLY. THE CONTRACTOR
SHALL FIELD VERIFY ALL UTILITY CONFLICTS. ALL DISCREPANCIES SHALL BE
REPORTED TO THE ENGINEER. THE CONTRACTOR SHALL CONTACT DIG SAFE
(888-344-7233) PRIOR TO ANY CONSTRUCTION.
2.PROPERTY LINE INFORMATION IS APPROXIMATE AND BASED ON EXISTING TAX
MAP INFORMATION. THIS PLAN IS NOT A BOUNDARY SURVEY AND IS NOT
INTENDED TO BE USED AS ONE.
3.SITE INFORMATION IS BASED ON A FIELD SURVEY PERFORMED BY CIVIL
ENGINEERING ASSOCIATES, INC MARCH 2022. CIVIL ENGINEERING ASSOCIATES,
INC. SURVEY ORIENTATION IS "GRID NORTH", VERMONT COORDINATE SYSTEM
OF 1983 (HORIZONTAL) AND NAVD88 (VERTICAL) ESTABLISHED FROM GPS
OBSERVATIONS ON SITE.
ENTRY SIDEWALK
SCALE: 1" = 5'
NORTH SIDEWALK
SCALE: 1" = 5'
SEE INSET NORTH
SIDEWALK
SEE INSET ENTRY
SIDEWALK
P:\AutoCADD Projects\2022\22101-Vermont Commons\1-CADD Files-22101\dwg\22101 - Site.dwg, C1.0, 3/16/2022 3:43:14 PMCommercial 2 Zoning District
Institutional &
Agricultural-South
Zoning District
DSM
DSM
MAB
AS SHOWN
22101
C2.0
03/18/2022
LOCATION MAP
1" = 2000'
VERMONT
COMMONS SCHOOL
75 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
SITE
IMPROVEMENTS
SITE DETAILS
PROJECT
LOCATION
A
C
CIVIL ENGINEERING ASSOCIATES, INC.
E
10 MANSFIELD VIEW LANE, SOUTH BURLINGTON, VT 05403
P: 802-864-2323 FAX: 802-864-2271 web: www.cea-vt.com
7
55 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
NOTES:
1.SIDEWALK JOINTS:
- CONSTRUCTION JOINTS: SET CONSTRUCTION JOINTS AT SIDE AND END TERMINATIONS OF PAVING AND AT
LOCATIONS WHERE PAVING OPERATIONS ARE STOPPED FOR MORE THAN ONE-HALF HOUR UNLESS PAVING
TERMINATES AT ISOLATION JOINTS.
- ISOLATION JOINTS: FORM ISOLATION JOINTS OF PREFORMED JOINT-FILLER STRIPS ABUTTING CONCRETE
CURBS, CATCH BASINS, MANHOLES, INLETS, STRUCTURES, OTHER FIXED OBJECTS, AND WHERE INDICATED.
- CONTRACTION JOINTS: FORM WEAKENED-PLANE CONTRACTION JOINTS, SECTIONING CONCRETE INTO AREAS
AS INDICATED. TYPICAL JOINT SPACING IS 5 FEET BUT MAY BE INDICATED DIFFERENTLY ON PLANS FOR WIDER
SIDEWALKS OR PLAZA AREAS. CONSTRUCT CONTRACTION JOINTS FOR A DEPTH EQUAL TO AT LEAST
ONE-FOURTH OF THE CONCRETE THICKNESS, CONTRACTION JOINTS MAY BE EITHER GROOVED or SAWED
JOINTS.
2.NO DEICER SHALL BE APPLIED TO SIDEWALK UNTIL AT LEAST 30 DAYS OF AIR DRYING TIME HAS OCCURRED.
3.LIQUID MEMBRANE-FORMING CURING AND SEALING COMPOUNDS SHALL MEET ASTM C309 or C1315. SEALERS
SHALL BE BASED ON SILANE OR SILOXANE TECHNOLOGY FOR BEST SALT AND WATER REPELLENCY FOR
CONCRETE PAVEMENTS. TWO COATS SHALL BE APPLIED AT RIGHT ANGLES FOR EVEN COVERAGE. INSTALL IN
CONFORMANCE WITH MANUFACTURERS RECOMMENDATIONS.
4.INSTALL POLYURETHANE ELASTOMERIC SEALANT AT ALL SAWED JOINTS.
N.T.S.
CONCRETE SIDEWALK DETAIL
S-002S-002 Conc Walk6"6"
SIDEWALK WIDTH AS SHOWN ON PLANS
8" COMPACTED CRUSHED
GRAVEL (704.05 FINE)
5" THICK CONCRETE SIDEWALK
(8" THICK AT DRIVEWAY CROSSINGS)
UNDISTURBED SOIL OR
APPROVED COMPACTED
GRANULAR FILL
REVISED 7/01/2019
4" MINIMUM TOPSOIL, SEED AND MULCH
ALL SIDESLOPE
- USE EROSION MATTING (WHEN
REQUIRED) TO ESTABLISH VEGETATION
N.T.S.
TRANSITION CURB DETAIL
S-006S-006 Trans Curb7"6'-0"1"FACE OF CURB
END TRANSITION SLOPE
BEGIN TRANSITION SLOPE
TOP OF CURB (SEE PLAN
FOR TYPE OF CURB)
FINISHED GRADE OF ROAD
PAVEMENT
REVISED 08/01/2014
N.T.S.
CROSSWALK DETAIL
S-008S-008 Crosswalk8'-0"AS SHOWN ON PLANS
2'-0"
2'-0"
WHITE THERMOPLASTIC
REVISED 12/19/2014
REVISED 4/23/15S-024S-024 ADA RAMP HANDRAIL1
12
N.T.S.
ADA COMPLIANT RAMP HANDRAIL
HANDRAIL TO BE MANUFACTURED
BY 'THOMPSON FABRICATING L.L.C.
(OR EQUAL)
338"1516"278"1' MIN.
1' MIN.
36" MIN.34" - 38"POST
#ASF FITTING
UPPER
RETURN
LOWER
RETURN
POST
516" ALUM.
RIVET NUT
ALUM. PIPE CAP
#TC-1 OR #TC-2
112" SCH. 40 ALUMINUM PIPE
SPRING LOCK WASHER (S.S.)
14" ROUND HEAD MACHINE SCREW (S.S.)
516" SOCKET HEAD
CAP SCREW (S.S.)
HI-COLLAR SPRING LOCK WASHER (S.S.)
CAST ALUM. RAIL SUPPORT #ASF-2
CAST ALUM. POST ADAPTER #ASF-1
P:\AutoCADD Projects\2022\22101-Vermont Commons\1-CADD Files-22101\dwg\22101 - Site.dwg, C2.0, 3/16/2022 3:15:35 PM
DSM
DSM
MAB
NTS
22101
C3.0
03/18/2022
LOCATION MAP
1" = 2000'
VERMONT
COMMONS SCHOOL
75 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
SITE
IMPROVEMENTS
SPECIFICATIONS
PROJECT
LOCATION
A
C
CIVIL ENGINEERING ASSOCIATES, INC.
E
10 MANSFIELD VIEW LANE, SOUTH BURLINGTON, VT 05403
P: 802-864-2323 FAX: 802-864-2271 web: www.cea-vt.com
7
55 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
P:\AutoCADD Projects\2022\22101-Vermont Commons\1-CADD Files-22101\dwg\22101 - Site.dwg, C3.0, 3/16/2022 3:16:25 PM
DSM
DSM
MAB
NTS
22101
C3.1
03/18/2022
LOCATION MAP
1" = 2000'
VERMONT
COMMONS SCHOOL
75 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
SITE
IMPROVEMENTS
SPECIFICATIONS
PROJECT
LOCATION
A
C
CIVIL ENGINEERING ASSOCIATES, INC.
E
10 MANSFIELD VIEW LANE, SOUTH BURLINGTON, VT 05403
P: 802-864-2323 FAX: 802-864-2271 web: www.cea-vt.com
7
55 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
P:\AutoCADD Projects\2022\22101-Vermont Commons\1-CADD Files-22101\dwg\22101 - Site.dwg, C3.1, 3/18/2022 10:01:34 AM
DSM
DSM
MAB
NTS
22101
C3.2
03/18/2022
VERMONT
COMMONS SCHOOL
75 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
SITE
IMPROVEMENTS
EPSC NOTES AND
DETAILS
A
C
CIVIL ENGINEERING ASSOCIATES, INC.
E
10 MANSFIELD VIEW LANE, SOUTH BURLINGTON, VT 05403
P: 802-864-2323 FAX: 802-864-2271 web: www.cea-vt.com
55 GREEN MOUNTAIN DRIVE
SOUTH BURLINGTON
VERMONT 05403
E-001 EC SheetN.T.S.
CONSTRUCTION FENCE DETAIL
REVISED 08/01/2014E-002E-002 Constr FenceWOOD POST
30"18"EXISTING GRADE
NATIVE MATERIAL
PLASTIC ORANGE
CONSTRUCTION FENCE
REVISED 08/01/2014E-004E-004 Constr. Ent20' (6m) RROADWAYAA
STABILIZED CONSTRUCTION ENTRANCE
N.T.S.12'. MIN.50' MIN.
SECTION A-A
DIVERSION RIDGE REQUIRED
WHERE GRADE EXCEEDS 2%
ROADWAY
2% OR GREATER
SPILLWAY
FILTER FABRIC
SANDBAGS OR
CONTINUOUS BERM OF
EQUIVALENT HEIGHT
DIVERSION RIDGE
SUPPLY WATER TO WASH
WHEELS IF NECESSARY
2"-3" (50-75mm) COURSE
AGGREGATE MIN. 8"
(150mm) THICK
PLAN VIEW
NOTES:
1.THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION THAT WILL PREVENT
TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC RIGHT-OF-WAYS. THIS MAY
REQUIRE TOP DRESSING, REPAIR AND/OR CLEAN OUT OF ANY MEASURES USED TO
TRAP SEDIMENT.
2.WHEN NECESSARY, WHEELS SHALL BE CLEANED PRIOR TO ENTRANCE ONTO PUBLIC
RIGHT-OF-WAY.
3.WHEN WASHING IS REQUIRED, IT SHALL BE DONE ON AN AREA STABILIZED WITH
CRUSHED STONE THAT DRAINS INTO AN APPROVED SEDIMENT TRAP OR SEDIMENT
BASIN.
NOTE:
USE SANDBAGS OR OTHER
APPROVED METHODS TO
CHANNELIZE RUNOFF TO
BASIN AS REQUIRED
REVISED 08/01/2014E-003E-003 Silt FenceN.T.S.
SILT FENCE DETAIL
NOTES:
1. INSTALL MIRAFI ENVIROFENCE, OR APPROVED EQUAL OR AS DETAILED HEREIN.
2. INSTALL SILT FENCES AT TOES OF ALL UNPROTECTED SLOPES AND AS PARALLEL TO
CONTOURS AS POSSIBLE. THIS INCLUDES ALL FILLED OR UNPROTECTED SLOPES
CREATED DURING CONSTRUCTION, NOT NECESSARILY REFLECTED ON THE FINAL
PLANS. CURVE THE ENDS OF THE FENCE UP INTO THE SLOPE. REMOVE SEDIMENT
WHEN ACCUMULATED TO HALF THE HEIGHT OF THE FENCE. SILT FENCES ARE TO BE
MAINTAINED UNTIL SLOPES ARE STABILIZED.
3. WHEN TWO SECTIONS OF FILTER CLOTH ADJOIN EACH OTHER, THEY SHALL BE
OVERLAPPED BY 6", FOLDED AND STAPLED.
10'
10'
2.5'
METAL POST
4 x 4 WOOD
POST SPACING
212 X 212 WOOD
36" MIN.12" MIN.POST
2"8"FILTER FABRIC TO BE
MIRAFI 100X OR APPROVED
EQUAL
FILTER FABRIC TO BE
CLIPPED, BACKFILLED AND
TAMPED 8" BELOW GRADE
STEEL OR WOOD STAKES
(SEE CHART AT RIGHT)
REVISED 08/01/2014E-005E-005 StockpileTEMPORARY STOCKPILE DETAIL
N.T.S.
TEMPORARY SEEDING & MULCH
OR NETTING
SILT FENCE OR HAY
BALES INSTALLED ON
DOWN GRADIENT SIDE
REVISED 08/01/2014E-007E-007 Infilt SectSILT FENCE CONSTRUCTION DETAIL
N.T.S.
2. ATTACH SILT FENCE
AND EXTEND IT TO
THE TRENCH.
3. STAPLE THE SILT
FENCING TO THE
END POSTS.
BACKFILL TRENCH.
1. SET POSTS AND
EXCAVATE A 4"X8"
TRENCH, SET POST
DOWNSLOPE.
ANGLE 10°
UPSLOPE FOR
STABILITY AND
SELF CLEANING
POSTS
SILT
FENCE
1
0
0
°12"MIN.8"COMPACTED
BACKFILL
Introduction
This project is subject to the terms and conditions of the authorization from the State of Vermont to
discharge construction related storm water runoff.
Coverage under the State Construction General Permit 3-9020 is required for any construction
activity that disturbs 1 or more acres of land, or is part of a larger development plan that will disturb
1 or more acres.
This project has been deemed to qualify as a Low Risk Site which is subject to the erosion
prevention and sediment control (EPSC) standards set for in the State of Vermont's
Low Risk Site Handbook for Erosion Prevention and Sediment Control
The following narrative and implementation requirements represent the minimum standard for
which this site is required to be maintained as regulated by the State of Vermont.
Any best management practices (BMP's) depicted on the project's EPSC Site plan which go beyond
the Handbook requirements are considered to be integral to the management of the site and
represent components of the municipal EPSC approval for the project which shall be implemented.
The EPSC plan depicts one snap shot in time of the site. All construction sites are fluid in their day
to day exposures and risks as it relates to minimizing sediment loss from the site. It is the
responsibility of the Contractor to implement the necessary BMP's to comply with the Low
Risk Handbook standards outlined on this sheet based on the interim site disturbance
conditions which may or may not be shown on the EPSC Site Plan.
Specific BMP's which are critical to allowing the project to be considered a Low Risk site include the
items checked below:
·Limit the amount of disturbed earth to two acres or less at any one time.
·There shall be a maximum of 7 consecutive days of disturbed earth exposure in any location
before temporary or final stabilization is implemented.
1.Demarcate Limits of Disturbance
Purpose:
Delineating the site will help to: limit the area of disturbance to only what is necessary for
construction, prevent unauthorized disturbance, preserve existing vegetation, and limit erosion
potential on the site.
Requirement:
You must physically mark the limits of construction activity using one of the methods described
below.
How to comply:
Before initiating any earth disturbing activities, install a perimeter fence, orange barrier tape, or
flagging on stakes or trees to physically demarcate the approved limits of earth disturbance.
2.Pollution Prevention
Purpose:
Many construction sites require storage of chemicals and materials that have detrimental effects if
released into our waterways. A storage plan for these potential pollution sources as well as a spill
prevention and clean up plan are required to mitigate these risks.
Requirement:
Design, install, implement, and maintain effective pollution prevention measures to minimize the
discharge of pollutants. At a minimum, such measures must be designed, installed, implemented
and maintained in accordance with the following requirements.
How to comply:
1. Minimize the exposure of the following to precipitation and to stormwater: building materials,
building products, construction wastes, trash, landscape materials, fertilizers, pesticides,
herbicides, detergents, sanitary waste, and other materials present on the site.
2. Minimization of exposure is not required in cases where the exposure to precipitation and to
stormwater will not result in a discharge of pollutants, or where exposure of a specific material
or product poses little risk of stormwater contamination (such as final products and materials
intended for outdoor use).
3.Limit Concurrent Earth Disturbance
Purpose:
Limit the amount of soil exposed at one time to reduce the potential erosion on the construction
site.
Requirement:
The maximum area of concurrent earth disturbance is specified on the site's written authorization
to discharge. Earth disturbance at any one time cannot exceed the maximum concurrent
disturbance identified in the authorization. Areas that are at final stabilization ornthat have been
temporarily stabilized in accordance with Section 4 of this handbook, are not counted toward the
maximum concurrent disturbance area.
How to comply:
Plan ahead and phase the construction activities to ensure that no more than the permitted
maximum concurrent acreage is disturbed and unstabilized at one time. Be sure to properly
stabilize exposed soil using one of the methods introduced in Section 4 of this handbook before
beginning work in a new section of the site.
4.Site Stabilization
Purpose:
Seeding and mulching, applying erosion control matting, and hydroseeding are all methods to
temporarily stabilize exposed soil and prevent soil erosion prior to vegetative growth. Mulches and
matting protect the soil surface while grass is establishing. Areas of earth disturbance may also be
stabilized with stone, such as rip-rap or gravel, or other impervious surfaces such as pavement and
concrete.
Requirements for Temporary Stabilization:
All areas of earth disturbance must have temporary or final stabilization within 14 days of initial
disturbance, as stated in the project authorization. After this time, disturbed areas must be
temporarily stabilized or permanently stabilized in advance of any runoff producing event. A runoff
producing event is an event that produces runoff from the construction site.
The following exception applies:
Temporary stabilization is not required if the work is occurring in a self-contained excavation (i.e.
no outlet) with a depth of 2 feet or greater (e.g. house foundation excavation, utility trenches),
provided any dewatering, if necessary, is conducted in accordance with Part 13.
How to comply:
As required by the authorization, temporary stabilization for areas of earth disturbance shall be
completed utilizing one or more of the methods below:
Straw Mulch
Mulching Rates
April 16 - Oct. 14 -- Straw: 1 inch deep (1-2 bales/1,000 s.f.)
Oct. 15 - April 15 -- Straw: 2 inch deep (2-4 bales/1,000 s.f.)
*seed may also be incorporated
Wood Chip Mulch or Stump Grindings
Cover entire area with 2-7 inches or more of wood chip mulch or stump grindings.
Hydroseed
As per manufacturer's instructions. Must include mulch component. Not acceptable stabilization for
winter construction period.
Requirements for Dust Control:
Construction roads, access points, and other disturbed areas subject to surface dust movement
and dust blowing during dry periods where off-site damage may occur if dust is not controlled shall
be sprayed with water to prevent dust mobilization. Chemical applications, including the use of
chloride, shall not be applied without written approval from the VT DEC.
Requirements for Final Stabilization:
All areas of disturbance must have permanent stabilization within 48 hours of reaching final grade.
Bring the site or sections of the site to final grade as soon as possible after construction is
completed. This will reduce the need for additional sediment and erosion control measures and will
reduce the total disturbed area. Prepare bare soil for seeding by grading the top 4 to 6 inches of
soil and removing any large rocks or debris, and apply seed per suppliers specifications.
5.Stabilized Construction Access
Purpose:
A stabilized construction access helps remove mud and sediment from vehicles and equipment to
prevent tracking onto streets.
Requirements:
If there will be any vehicle or equipment traffic off of the construction site, you must install a
stabilized construction access at the start of construction.
How to install:
Rock Size: Use a mix of 1 to 4 inch stone
Depth: 8 inches minimum
Width: 12 feet minimum, flared at road for vehicle turning
Length: 40 feet minimum (or length of driveway for residential projects, if shorter)
Geotextile: Place filter cloth under entire stone bed
Maintenance:
Redress with clean stone or scarify to open voids as required to keep sediment from tracking onto
the street.
·Where sediment has been tracked-out from your site onto paved roads, sidewalks, or other
paved areas outside of your site, remove the deposited sediment by the end of the same
business day in which the track-out occurs or by the end of the next business day if track-out
occurs on a non-business day.
·Remove the track-out by sweeping, shoveling, or vacuuming these surfaces, or by using other
similarly effective means of sediment removal.
·You are prohibited from hosing or sweeping tracked out sediment into any stormwater
conveyance, storm drain inlet, or water of the state.
6.Divert Upland Runoff
Purpose:
Diversion berms intercept stormwater runoff contributing from above the construction site and
direct it around the disturbed area. This prevents offsite runoff from entering the construction site,
thus reducing the potential for erosion and reducing the drainage area contributing to the site.
Requirements:
If stormwater runoff contributes to the construction site from upslope areas and the site meets the
following two conditions, you are required to first install a diversion berm and stabilized swale
before disturbing any additional soil.
1. One or more acres of soil will be disturbed at any one time.
2. Average slope of the disturbed area is 20% or steeper.*
Diversion Berm installation:
1. Construct berm to the minimum specification above.
2. Compact the berm with a shovel or earth-moving equipment.
3. Seed and mulch berm or cover with erosion control matting immediately after installation.
4. Stabilize the flow channel with seed and mulch or erosion control matting. Line the
channel with 4 inch stone if the channel slope is greater than 20%.
5. Ensure the berm drains to an outlet stabilized with ripra p. Ensure that there is no erosion
at the outlet.
6. The diversion berm shall remain in place until the disturbed areas are completely
stabilized.
7.Install Perimeter Controls
Purpose:
Silt Fence and Erosion Control Berms intercept runoff and allow suspended sediment to settle or
filter out. Filter Socks and Straw Wattles also filter construction runoff and are acceptable for use in
specific situations. Silt Fence, Erosion Control Berms, Filter Socks and Straw Wattles are all
acceptable perimeter controls based on site specific conditions. Permittee(s) must ensure the
right practice is selected for erosion prevention and sediment control.
Requirements:
Perimeter controls must be installed:
·On the downhill side of the construction activities
·Between any ditch, swale, storm drain, or surface water and the disturbed soil
·Perimeter controls not labeled as biodegradable shall be removed once the drainage area has
reached final stabilization
How to Comply:
Select and install a perimeter control from the following options: Silt Fence, Erosion Control
Berms, Filter Socks, or Straw Wattles.
Where to place:
·Place perimeter controls on the downhill side of disturbed soil. If space is available, place
perimeter control 10 ft from the bottom of the slope, otherwise place along the contour at
the bottom of the slope.
·Ensure the perimeter control catches all runoff from distrubed soil.
·Maximum drainage area is¼ acre for 100 feet of silt fence and erosion control berm.
·Install perimeter controls across the slope (not up and down slope)
·Install multiplerows of perimeter control on long slopes to intercept flow.
·Do not install perimeter controls across ditches, channels, or streams.
·Maximum slope length (in feet) above a filter sock or straw wattle
Silt Fence
A temporary barrier of geotextile fabric installed on the contours across a project site to intercept
sediment laden runoff from small drainage areas of disturbed soil.
Silt Fence Installation:
·Dig a trench 6 inches deep across the slope
·Unroll silt fence along the trench
·Ensure stakes are on the downhill side of the fence
·Join fencing by rolling the end stakes together
·Drive stakes in against downhill side of trench
·Drive stakes until 16 inches of fabric is in trench
·Push fabric into trench; spread along bottom
·Fill trench with soil and pack down
·Gravel can be used to create ground contact with filter fabric when bedrock, ledge, or nearby
tree roots do not allow for trenching. (A secondary perimeter control can be effective in these
locations as well.)
Silt Fence Maintenance:
Remove accumulated sediment before it is halfway up the fence. Ensure that silt fence is trenched
in ground and there are no gaps. Replace any silt fence that is torn, ripped, or otherwise damaged
that
8.Storm Inlet Protection
Purpose:
Existing or new storm inlets on construction sites constitute a site perimeter and must be protected
from sediment laden runoff. The practices below allow stormwater to settle and filter through the
practice and not bypass the in let entirely.
Requirements:
Stormwater inlets shall be 4 inches above grade or an acceptable inlet control/protection should be
installed.
Inlet Protection Installation:
Proprietary Inlet Protection:
Shall provide for storage and removal of sediment and be sized appropriately for the drainage
area, while allowing stormwater to filter through. These may be used if installed and maintained in
accordance with the manufacturer's specifications.
Stone and Block Inlet Protection:
Concrete blocks placed around an inlet with a circle of filtering stone sloped against the blocks.
Filter Fabric and Stone Inlet Protection:
Vertical filter fabric installed around drop inlet with stone around fabric for stormwater filtering and
creating ground contact with filter fabric. Alternatively, fabric may be buried below ground.
9.Water Bars
Purpose:
Some sites may benefit from the use of water bars on the construction site. When installed these
may capture and redirect runoff to a stable low gradient location. Water bars limit the erosive
velocity of water by diverting surface runoff at pre-designed intervals.
Requirements:
These can be constructed per the following detail, with side slopes no steeper than 4:1 where
vehicles cross with a minimum design height of 12 inches, measured from channel bottom to ridge
top.
Water Bar installation:
Water bars should have stable outlets, either natural or constructed. The spacing should follow
Table 1:
10.Slow Down Channelized Runoff
Purpose:
Stone check dams reduce erosion in drainage channels by slowing down the stormwater flow.
Requirements:
If there is a concentrated flow(e.g. in a ditch or channel) of stormwater on your site, then you are
required to install stone check dams. Hay bales and silt fence must not be used as check dams.
Check Dam installation:
Height: No greater than 2 feet. Center of dam should be 9 inches lower than the side elevation
Side slopes: 2:1 or flatter (see p.63 for slope calculation)
Stone size: Use a mixture of 2 to 9 inch stone; the larger stone should act as armoring, while the
smaller stone helps to filter the channelized runoff. The small stone should be placed primarily in
the interior of the check dam and the large stone should be placed in an armoring layer on the
outside.
Width: Dams should span the width of the channel and extend up the sides of the banks
Spacing: Space the dams so that the bottom (toe) of the upstream dam is at the elevation of
the top (crest) of the downstream dam. This spacing is equal to the height of the check dam
divided by the channel slope.
Check Dam Maintenance:
Correct all observed damage immediately after every ru naff event.
Remove all sediment accumulated behind the check dams and dispose of in an upland location.
If significant erosion is observed between check dams, the channel shall be stone lined.
Rock Outlet Protection:
Waterways or outlets with concentrated stormwater runoff shall be stabilized with riprap, proprietary
stabilization product or permanent material. This additional stabilization is applicable in areas
where the channel slope and velocity or soil type require additional stabilization. All outlets from
concentrated stormwater flows will require a stabilized bed. Stone shall be sized so it is not
mobilized during high flows.
11.Slope Stabilization
Purpose:
Surface covering designed to protect and stabilize an area prone to erosion where seeding and
mulching may be inadequate, generally slopes 3:1 or greater. The erosion potential may be due
solely to slope angle; however,
a more gradual slope and poor soil structure can also require additional stabilization.
Requirements for Temporary Stabilization:
Use of one of the listed slope protection practices below on slopes 3:1 and greater or as needed on
flatter slopes based on soil type.
Riprap: A layer of stone designed to protect and stabilize areas subject to erosion.Rolled Erosion
Control Product:
A preformed protective blanket of straw or other plant residue, formed into a mat, with a supporting
mesh framework on one or both sides. This mesh cannot be made of a material with welded joints.
Erosion Control Matting:
Install per manufacturer's instructions.
12.Winter Construction Requirements: October 15 - April 15
Purpose:
'Winter construction' as discussed here, describes the period from October 15 through April 15,
when erosion prevention and sediment control is significantly more difficult. There are specific
requirements for sites that conduct earth disturbance during the defined Winter Construction
Period and for sites where disturbed areas have not reached final stabilization by October 15.
Rains in late fall, thaws throughout the winter, and spring melt and rains can produce significant
flows over frozen and saturated ground, greatly increasing the potential
for erosion. A construction site can be managed to anticipate these conditions to prevent erosion
and thus minimize the risk to water quality during this time period.
Requirements for Winter Shutdown:
For projects or areas of a site that will have completed earth disturbance activities prior to the
winter construction period (October 15 through April 15), the following requirements must be
adhered to:
1. For areas to be stabilized for the winter through the establishment of vegetation, seeding and
mulching shall be completed no later than September 15 to ensure adequate growth and cover
before the start of the winter period.
2. If seeding is not completed by September 15, additional non-vegetative protection must be
used to stabilize the site for the winter period. Areas of disturbance not seeded and mulched by
September 15 are required to temporarily stabilize by one of the following methods:
Implement Rolled Erosion Control Products (i.e. matting) over the areas of earth disturbance.
Apply a 2" mulch layer to areas of earth disturbance, equivalent to double the standard rate.
Mulch should be tracked in open areas vulnerable to wind.
Seeding with winter rye is recommended to allow for early germination during wet spring
conditions.
Requirements for Winter Construction
If construction activities involving earth disturbance continue into the winter construction period,
the following requirements apply:
1. Enlarged access points, stabilized to provide for snow stockpiling.
2. Snow shall be managed with adequate storage and control of meltwater, requiring cleared
snow to be stored down slope of all areas of disturbance and out of stormwater treatment
structures.
3. For areas of disturbance within 100 ft of a waterbody, the following must be installed across
the slope, down gradient of the earth disturbance: a combination of one practice from group A
placed in front of a practice from group B, or two group B practices, or a single row of Reinforced
Silt Fence
4. Drainage structures must be kept open and free of snow and ice dams.
5. Silt fence and other practices requiring earth disturbance must be installed ahead of frozen
ground.
6. Mulch used for temporary stabilization must be applied at a minimum of 2 inches with an
80-90% cover.
7. To ensure cover of disturbed soil in advance of a precipitation or melt event, areas of
disturbed soil must be stabilized prior to any runoff producing event.
Stabilization is not required if the work is occuring in a self-contained excavation (i.e. no outlet)
with a depth of 2 feet or greater (e.g. house foundation excavation, utility trenches), provided
any dewatering, if necessary, is conducted in accordance with Part 13.
8. Prior to stabilization, snow or ice must be removed to the extent practicable.
9. Use stone to stabilize areas such as the perimeter of buildings under construction or where
construction vehicle traffic is anticipated. Stone paths should
be sufficient width to accommodate vehicle or equipment traffic.
13.Dewatering Activities
Purpose:
To minimize and prevent discharges of sediment as a result of dewatering activities.
Requirements:
Stormwater and groundwater from dewatering activities shall be uncontaminated and shall be
filtered or passed through a sediment trapping device, or both, and routed in a manner that does
not result in visually turbid discharges to waters. Pump intake for dewatering must be at or near
the surface of the ponding area to prevent disturbance of the settled material. Visually turbid water
must not be pumped directly to storm drains or other conveyance that leads to waters without
implementing one or more of the practices described below.
How to comply:
Implement one or more of the following practices when dewatering:
Implement sock filters or sediment filter bags on dewatering pump discharge hoses or pipes.
Route dewatering pump into silt fence enclosures or into staked hay bale enclosures lined with
fabric.
Route dewatering pump to vegetated area at least 50 feet from surface waters and at a slope no
greater than 5%. Remove accumulated sediment after the water has dispersed or infiltrated and
stabilize the area with seed and mulch as necessary. A sufficient area of vegetation greatly
improves the efficacy of filtering/settling of turbid water discharged from a dewatering enclosure.
14.Concrete Washout
Purpose:
Concrete wash water often contains a slurry of heavy metals, can be caustic, and has a high pH.
As a result, concrete washwater is not a permitted discharge.
Requirements:
Concrete washwater and excess washout concrete should go in a lined washout. This washout
should be accessible to the cement truck and at least 50 feet away from stormwater inlets and
surface water.
Concrete Washout Installation:
If cement washout is going to occur on site, a lined concrete washout as shown below shall be
used onsite. Care should be given to assure that the washout does not overtop during a storm
event. Proprietary lined and
contained concrete washout basins may also be utilized in accordance with manufacturer's
specifications.
Concrete Washout Maintenance:
Concrete washout shall be pumped to a concrete truck as necessary, for disposal or reuse at a
batch plant. Washout may also be allowed to evaporate/harden for disposal in accordance with all
applicable local, state, and federal regulations.
15.Permanent Controls
Permanent stormwater treatment practices are constructed to maintain water quality, preserve
existing water table elevations, prevent downstream flooding, and are often required for a project
under a Vermont operational stormwater discharge permit applicable to the construction or
redevelopment of impervious surfaces.*
Permanent Stormwater Treatment Practices (STPs) include infiltration and filtering practices as well
as detention ponds and treatment wetlands. It is critical that infiltration practices do not receive
runoff until the site area has reached final stabilization.
The outlet of permanent controls that are used as temporary storage and sediment basins during
construction constitutes a potential discharge point and therefore must be managed to minimize
and prevent sediment laden stormwater discharges. These practices will often need to be reshaped
to meet the operational design criteria for volumes, grades and geometry once final grading and
stabilization has occurred.
16.Inspection, Maintenance, and Discharge Reporting
Site inspections are required to ensure that all erosion prevention and sediment control practices
are sufficient and functioning properly. Regular inspections and maintenance of practices will help
to reduce costly repairs and minimize the risk to water quality from construction stormwater
discharges.
Requirements:
Inspect the site at least once every 7 days and after every rainfall or snowmelt that results in
stormwater runoff. Perform maintenance to ensure that practices are functioning according to the
specifications outlined in this handbook. In the event of a visibly turbid discharge from the
construction site, you must take immediate action to inspect and maintain existing erosion
prevention and sediment control practices. Additional erosion prevention and sediment control
measures must be installed as necessary, including temporary stabilization, to minimize and
prevent the discharge of sediment laden stormwater runoff. If after maintaining and supplementing
BMPs, a discharge of visibly discolored stormwater from the construction site to surface waters
continues, the permittee is required to notify DEC within 24 hours.
While documentation of a routine inspection is not required, example inspection forms and forms
for required discharge reporting are available at the Stormwater Program website. Permittees shall
review Construction General Permit 3-9020 for all discharge reporting requirements. A copy of the
Low Risk Site Handbook shall be kept on-site. Daily inspections are required from October 15
through April 15.
MULCH NOTE:
MULCH FOR PURPOSES OTHER THAN
HYDROSEEDING WILL BE CLEAN STRAW, FREE
FROM WEEDS. HAY MULCH WILL NOT BE
ALLOWED TO AVOID THE SPREAD OF
NON-NATIVE SPECIES SUCH AS WILD PARSNIP.P:\AutoCADD Projects\2022\22101-Vermont Commons\1-CADD Files-22101\dwg\22101 - Site.dwg, C3.2, 3/18/2022 10:03:43 AM