SW4210701_Plansheet - Landscape/Planting Plan_20211229

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WETLAND PLANTS INC., EDENTON, NC
95 SWAMP MILKWEED
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GRAPHIC SCALE
20 D 10 20 40
( IN FEET )
1 inch = 20 ft.
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100 STARRUSH WHITETOP
General Landscaping Guidance for All Stormwater BMPs SEDIMENT / EXTENDED DETENTION BASIN
1. Trees, shrubs, and woody vegetation are not allowed on any embankment impounding water. Construction Specifications
2. Plant trees and shrubs at least 15 feet away from the toe of slope of a dam and at least 25 feet 1. Clear, grub, and strip the area under the embankment of all vegetation
away from a principal spillway structures. and root mat. Remove all surface soil containing high amounts of organic
matter and stockpile or dispose of it properly. Haul all objectionable
3. Trees or shrubs known to have long taproots should not be within the vicinity of the earth dam or material to the designated disposal area.
subsurface drainage facilities. 2. Ensure that fill material for the embankment is free of roots, woody
vegetation, organic matter, and other objectionable material. Place the fill
4. Plant trees and shrubs at least 25 feet away from perforated pipes. in lifts not to exceed 9 inches, and machine compact it. Over fill the
embankment 6 inches to allow for settlement.
5.
Provide 15 foot clearance from a non -clogging, low flow orifice.
3. Shape the basin to the specified dimensions. Excavate a small
6.
Herbaceous embankment plantings should be limited to 10 inches in height.
peninsula about 1.5 feet above the basin bottom around the planned
location of the skimmer to accommodate a concrete slab for the skimmer
to settle on in order to keep grass and debris away from the skimmer.
7.
Use erosion control mats and fabrics in channels to reduce the potential
P
The slab also allows the skimmer to settle to the bottom and drain the
for
erosion.
entire basin. The additional 1.5 feet excavation will accumulate most of
the sediment and will become the basin bottom. The slab usually holds a
8.
Stabilize all emergency spillways with plant material that can withstand strong flows. Root material
small amount of water that aids in keeping debris away from the skimmer
should be fibrous and substantial but lacking a taproot.
that could clog the screen and inlet.
9.
Divert flows temporarily from seeded areas until stabilized.
4. Place the barrel (outlet pipe) on a firm, smooth foundation of
impervious soil. Do not use pervious material such as sand, gravel, or
10.
Check water tolerances of existingplant materials riot to inundation of area.
p p
crushed stone as backfill around the pipe. Place the fill material around
the pipe spillway in 4-inch layers and compact it under and around the
pipe to at least the same density as the adjacent embankment. Care
11.
Stabilize aquatic and safety benches with emergent wetland plants and wet seed mixes.
must be taken not to raise the pipe from the firm contact with its
foundation when compacting under the pipe haunches. Install anti -seep
12.
Do not block maintenance access to structures with trees or shrubs.
collars as specified slightly down stream from dam centerline. Place a
minimum depth of 2 feet of compacted backfill over the outlet pipe
13.
To reduce thermal warming, shade inflow and outflow channels as well as southern exposures of
before crossing it with construction equipment. In no case should the pipe
ponds.
conduit be installed by cutting a trench through the dam after the
embankment is complete. Install the concrete anti -floatation slab base;
14.
Avoid that intensive (i.e. turf
securely attach the box riser to the base at the proper elevations and
plantings will require routine or chemical applications area).
locations as shown on the plans.
15.
Have soil tested to determine if there is a need for amendments.
5. Assemble the skimmer following the manufacturer's instructions.
16. Native plant species should be specified over exotic or foreign species because they are well
6. Lay the assembled skimmer on the bottom of the basin with the
adapted to local on -site soil and temperature conditions, are beneficial for wildlife, and require little or no
flexible joint at the proper inlet location on the riser. Attach the flexible
additional amendments.
joint to the inlet pipe and position the skimmer over the excavated
peninsula and slob in the basin. The skimmer should settle level across
17. Decrease the areas where managed grass (turf) is used. Use low maintenance ground cover to absorb
the top of the pipe with the door on it, so that the debris guards work.
Otherwise, debris that accumulates around the float will flow under the
run-off.
float and clog the screen, when the water level drops. Adjust the flexible
joint connection if necessary, especially if the skimmer is pulled to the
18. Plant stream and water buffers and filter strips with trees, shrubs, ornamental grasses, and herbaceousside and the inlet pipe is not aligned with the riser. The float is balanced
materials where possible, to stabilize banks and provide shade.
so that the rear settles down as the last few inches of water drain from
the basin. This positions the float and guards to contain floating debris on
19. Maintain and frame desirable views. Be careful not to block views at entrances, exits, or difficult road
the outside of the float as the water level drops. Place a stake at the
curves. Screen unattractive views into the site. Aesthetics and visual characteristics should be second in
connection of the flexible joint so that the bockhoe operator will know the
location when excavating accumulated sediment from under the skimmer
importance only to pollutant removal and runoff control characteristics.
and not damage it. After installing the skimmer, check to make sure the
orifice has not fallen out while moving. Tie a polypropylene rope around
20. Use plants to prohibit pedestrian access to pools or steeper slopes.
the tee between the vent and horizontal tube. Anchor the other end of
the rope to a stake on the embankment or side of the basin. Tension the
21. The designer should carefully consider the long-term vegetation management strategy for the BMP,
rope as necessary so that the skimmer will settle into the pit after the
keeping in mind the maintenance legacy for the future owners. Make sure the facility maintenance
basin drains. (Adapted from A Manual for Designing, Installing and
agreement includes requirements to ensure vegetation cover in perpetuity.
Maintaining Skimmer Sediment Basins." February, 1999. J. W. Faircloth &
Son).
22. Provide a planting surface that can withstand the compaction of vehicles using maintenance access
7 Earthen spillways - Install the spillway in undisturbed soil. The
roads.
achievement of planned elevations, grade, design width, and entrance and
exit channel slopes are critical to the successful operation of the spillway.
23. If a BMP is likely to receive excessive amounts of deicing salt, salt tolerant plants should be used.
The spillway may be lined with laminated plastic or permeable geotextile
fabric. The fabric must be wide and long enough to cover the bottom and
24. Provide signage to help educate the public and to designate maintenance limits.
sides and extend onto the top of the dam for anchoring in a trench. The
edges may be secured with 12-inch staples or pins. The fabric must be
25. Chose plants to create a diversity of herbaceous, shrub and tree species.
long enough to extend down the slope and exit onto stable ground. The
width of the fabric must be one piece, not joined or spliced; otherwise
26. Preserve existing natural vegetation when possible.
g g p
water can get under the fabric. If the length of the fabric is insufficient
for the entire length of the spillway, multiple sections, spanning the
complete width, may be used. The upper section(s) should overlap the
SOIL:
lower section(s) so that water cannot flow under the fabric. Secure the
upper edge and sides of the fabric in a trench with staples or pins.
It is necessary to test the soil in which you are about to plant in order to determine the following:
(Adopted from A Manual for Designing, Installing and Maintaining Skimmer
Sediment Basins." February, 1999. J. W. Faircloth & Son.).
pH; whether acid, neutral, or alkaline
major soil nutrients; Nitrogen, Phosphorus, Potassium
8. Inlets - Discharge water into the basin in a manner to prevent erosion.
minerals; such as chelated iron, lime
Use temporary slope drains or diversions with outlet protection to divert
sediment laden water to the upper end of the pool area to improve basin
Have soil samples analyzed by experienced and qualified individuals, such as those at the USDA
trap efficiency.
Agricultural Extension Office, who will explain in writing the results, what they mean, as well as what soil
g. Erosion control - Construct the structure so that the disturbed area is
amendments would be required. Certain soil conditions, such as marine clays, can present serious
minimized. Divert surface water away from bare areas. Complete the
constraints to the growth of plant materials and may require the guidance of qualified professionals. When
embankment before the area is cleared. Stabilize the emergency spillway
poor soils can not be amended, seed mixes and plant material must be selected to establish ground
embankment and all other disturbed areas above the crest of the principal
cover as quickly as possible.
spillway immediately after construction.
Areas that recently have been involved in construction can become compacted so that plant roots cannot
penetrate the soil. Also seeds will lie on the surface of compacted soils and are often washed away or
10. Install porous baffles as specified in locations shown on plans.
eaten by birds. For planting success, soils should be loosened to a depth of three to five inches. Hard
soils may require disking to a deeper depth. The soil should be loosened regardless of the ground cover.
11. After all the sediment -producing areas have been permanently
This will improve seed contact with the soil, increase germination rates, and allow the roots to penetrate
stabilized, remove the accumulated silt and dispose properly, bringing the
the soil. For areas to be sodded, disking is necessary so that the roots can penetrate the soil. Providing
basin to its original design volume. Check the operation of the skimmer
and spillways and make sure all pipes and structures are clear. Dress
good growing conditions can prevent poor vegetative cover. This saves money because vegetation will
basin slopes and sow native grasses and flowers to make the basin as
not need to be replanted.
attractive as possible. Smooth the slopes to blend with the adjoining
areas and stabilize properly and immediately.
Whenever possible, topsoil should be spread to a depth of four to eight inches and lightly compacted to
minimum thickness of four inches. This provides organic matter and important nutrients for the plant
Maintenance
material. The use of topsoil allows vegetation to become established faster and roots to penetrate p g p
Inspect skimmer sediment basins weekly and after each significant
deeper. This ensures quicker and more complete stabilization, making it less likely that the plants will
(one-half inch or greater) rainfall event and repair immediately. Remove
wash out during a heavy storm. If topsoil has been stockpiled in deep mounds for a long period of time,
sediment and restore the basin to its original dimensions when sediment
it is necessary to test
accumulates to one-half the height of the first baffle. Pull the skimmer
the soil for pH as well as microbial activity. If the microbial activity has been destroyed, it is necessary toto one side so that the sediment underneath it can be excavated.
inoculate the soil after application.
Excavate the sediment from the entire basin, not just around the skimmer
or the first cell. Make sure vegetation growing in the bottom of the basin
Remember that newly installed plant material requires water in order to recover from the shock of being
does not hold down the skimmer. Repair the baffles if they are damaged.
transplanted. Be sure that some source of water is provided, especially during dry periods. This will
Re -anchor the baffles if water IS flowing underneath or around them. If
reduce plant loss and provide the new plant materials with a chance to establish root growth.
the skimmer is clogged with trash and there is water in the basin, usually
jerking on the rope will make the skimmer bob up and down and dislodge
the debris and restore flow. If this does not work, pull the skimmer over
to the side of the basin and remove the debris. Also check the orifice
inside the skimmer to see if it is clogged; if so remove the debris. If the
skimmer arm or barrel pipe is clogged, the orifice can be removed and
BMP PLANTING PLAN
the obstruction cleared with a plumber's snake or by flushing with water.
Be sure and replace the orifice before repositioning the skimmer. Check
the fabric lined spillway for damage and make any required repairs with
fabric that spans the full width of the spillway.
1. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING WORK AS SPECIFIED ON THESE PLANS.
2. CONTRACTOR SHALL NOTIFY THIS OFFICE OF ANY DISCREPANCIES PRIOR TO BEGINNING OR CONTINUING WORK.
3. SIZE OF PLANT MATERIALS SHALL CONFORM WITH THE CURRENT EDITION OF "AMERICAN STANDARD FOR NURSERY
STOCK" FOR NUMBER ONE GRADE NURSERY STOCK AS ADOPTED BY THE AMERICAN ASSOCIATION OF NURSERYMEN AND
AMERICAN NATIONAL STANDARDS INSTITUTE.
4. ALL DISTURBED AREAS ARE TO BE SEEDED OR SODDED UNLESS OTHERWISE NOTED.
5• PLEASE CONTACT LANDSCAPE DESIGNER REGARDING SUBSTITUTIONS.
6. A MINIMUM OF 50 HERBACEOUS PLANTS PER 200 SF OF SHELF AREA SHALL BE PLANTED IN THE SHALLOW WATER
ZONE AND IN THE SHALLOW LAND ZONE. WHERE SHRUBS ARE PROPOSED IN THE SHALLOW LAND ZONE, THEY SHALL BE
IN 1 GALLON CONTAINERS AND SPACED 8 SHRUBS PER 200 SF (5' D.C.).
7• ALL PLANT MATERIALS SHALL BE A NATIVE SPECIES AND PURCHASED FROM A LOCAL SOURCE TO ENSURE
SURVIVABILITY.
8.
SEE SHEET 7 FOR SEEDING SPECIFICATIONS AND ADDITIONAL LANDSCAPING NOTES.
POND PLANTING ZONES
N.T.S.
MAINTENANCE AND OPERATION MANUAL
FOR
PERMANENT EXTENDED DETENTION POND
(MAINTENANCE AND OPERATION ARE THE RESPONSIBILITY OF THE OWNER)
I. Monthly, or after every runoff producing rainfall event,
whichever comes first:
A. Inspect the trash rack; remove accumulated debris,
repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales;
remove trash, and repair eroded areas before the next
rainfall event.
II. Quarterly (Four times a year):
A. Inspect the collection system (i.e. catch basins, piping,
grassed swales) for proper functioning. Accumulated
trash will be cleared from basin grates, basin bottoms,
and piping will be checked for obstructions and cleared
as required.
B. Pond inlet pipes will be checked for undercutting. Riprap
or other energy dissipation structures will be replaced,
and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet
structure will be removed.
B. The fore bay depth will be checked at various points.
C. Grassed swales, including the vegetated filter if applicable,
will be reseeded twice a year as necessary.
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment
removal will occur when the depth is reduced to 75% of
RMANENT POOL the original design depth or 3 ft., whichever is greater.
Sediment must be removed to at least the original design
JD SIDE SLOPE depth.
V. General:
A. Mowing of the side slopes will be accomplished according
to the season. Maximum grass height will be 6 inches.
B. All components of the detention pond system will be kept
in good working order. Repair or replacement components
will meet the original design specifications as per the
approved stormwater plan. If previously approved components
are determined to be ineffective, the component must be
redesigned and/or replaced.
Gupton's Royal
Design Group
CIVIL ENGINEERING - SITE PLANNING
STORMWATER DESIGN
LANDSCAPE DESIGN o LAND SURVEYING
RDG
PO BOX 1070
KING, NC 27021
OFFICE 336-985-6519
E-MAIL [e-mail]
CORPORATE LICENSE NO: 0-0423
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PLAN SCALE: 1:20
REVISIONS:
07101120
BID SET
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UPDATE
SURVEYED BY. OTHERS
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SHEET TITLE:
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DATE:
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PROJECT NO:
12804-19

115 SWAMP MILKWEED
139 STARRUSH WHITETOP
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115 SPOTTED TRUMPETWEED
Plants 200SQ,FT 737.5 RIEQUIRPLANTS.
Installed:�Wetland Plants
Asclepids incomato
Rhynchospoira ,,
Swamp Milkweed
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H&H PLANTS, LLC, GARNER, NC
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GRAPHIC SCALE
20 0 10 20 40
( IN FEET )
1 inch = 20 ft.
80
General Landscaping Guidance for All Stormwater BMPs SEDIMENT / EXTENDED DETENTION BASIN
1. Trees, shrubs, and woody vegetation are not allowed on any embankment impounding water. Construction Specifications
2. Plant trees and shrubs at least 15 feet away from the toe of slope of a dam and at least 25 feet 1. Clear, grub, and strip the area under the embankment of all vegetation
away from a principal spillway structures. and root mat. Remove all surface soil containing high amounts of organic
matter and stockpile or dispose of it properly. Haul all objectionable
3. Trees or shrubs known to have long taproots should not be within the vicinity of the earth dam or material to the designated disposal area.
subsurface drainage facilities. 2. Ensure that fill material for the embankment is free of roots, woody
vegetation, organic matter, and other objectionable material. Place the fill
4. Plant trees and shrubs at least 25 feet away from perforated pipes. in lifts not to exceed 9 inches, and machine compact it. Over fill the
embankment 6 inches to allow for settlement.
5.
Provide 15 foot clearance from a non -clogging, low flow orifice.
3. Shape the basin to the specified dimensions. Excavate a small
6.
Herbaceous embankment plantings should be limited to 10 inches in height.
peninsula about 1.5 feet above the basin bottom around the planned
location of the skimmer to accommodate a concrete slab for the skimmer
to settle on in order to keep grass and debris away from the skimmer.
7.
Use erosion control mats and fabrics in channels to reduce the potential
P
The slab also allows the skimmer to settle to the bottom and drain the
for
erosion.
entire basin. The additional 1.5 feet excavation will accumulate most of
the sediment and will become the basin bottom. The slab usually holds a
8.
Stabilize all emergency spillways with plant material that can withstand strong flows. Root material
small amount of water that aids in keeping debris away from the skimmer
should be fibrous and substantial but lacking a taproot.
that could clog the screen and inlet.
9.
Divert flows temporarily from seeded areas until stabilized.
4. Place the barrel (outlet pipe) on a firm, smooth foundation of
impervious soil. Do not use pervious material such as sand, gravel, or
10.
Check water tolerances of existingplant materials riot to inundation of area.
p p
crushed stone as backfill around the pipe. Place the fill material around
the pipe spillway in 4-inch layers and compact it under and around the
pipe to at least the same density as the adjacent embankment. Care
11.
Stabilize aquatic and safety benches with emergent wetland plants and wet seed mixes.
must be taken not to raise the pipe from the firm contact with its
foundation when compacting under the pipe haunches. Install anti -seep
12.
Do not block maintenance access to structures with trees or shrubs.
collars as specified slightly down stream from dam centerline. Place a
minimum depth of 2 feet of compacted backfill over the outlet pipe
13.
To reduce thermal warming, shade inflow and outflow channels as well as southern exposures of
before crossing it with construction equipment. In no case should the pipe
ponds.
conduit be installed by cutting a trench through the dam after the
embankment is complete. Install the concrete anti -floatation slab base;
14.
Avoid that intensive (i.e. turf
securely attach the box riser to the base at the proper elevations and
plantings will require routine or chemical applications area).
locations as shown on the plans.
15.
Have soil tested to determine if there is a need for amendments.
5. Assemble the skimmer following the manufacturer's instructions.
16. Native plant species should be specified over exotic or foreign species because they are well
6. Lay the assembled skimmer on the bottom of the basin with the
adapted to local on -site soil and temperature conditions, are beneficial for wildlife, and require little or no
flexible joint at the proper inlet location on the riser. Attach the flexible
additional amendments.
joint to the inlet pipe and position the skimmer over the excavated
peninsula and slob in the basin. The skimmer should settle level across
17. Decrease the areas where managed grass (turf) is used. Use low maintenance ground cover to absorb
the top of the pipe with the door on it, so that the debris guards work.
Otherwise, debris that accumulates around the float will flow under the
run-off.
float and clog the screen, when the water level drops. Adjust the flexible
joint connection if necessary, especially if the skimmer is pulled to the
18. Plant stream and water buffers and filter strips with trees, shrubs, ornamental grasses, and herbaceousside and the inlet pipe is not aligned with the riser. The float is balanced
materials where possible, to stabilize banks and provide shade.
so that the rear settles down as the last few inches of water drain from
the basin. This positions the float and guards to contain floating debris on
19. Maintain and frame desirable views. Be careful not to block views at entrances, exits, or difficult road
the outside of the float as the water level drops. Place a stake at the
curves. Screen unattractive views into the site. Aesthetics and visual characteristics should be second in
connection of the flexible joint so that the bockhoe operator will know the
location when excavating accumulated sediment from under the skimmer
importance only to pollutant removal and runoff control characteristics.
and not damage it. After installing the skimmer, check to make sure the
orifice has not fallen out while moving. Tie a polypropylene rope around
20. Use plants to prohibit pedestrian access to pools or steeper slopes.
the tee between the vent and horizontal tube. Anchor the other end of
the rope to a stake on the embankment or side of the basin. Tension the
21. The designer should carefully consider the long-term vegetation management strategy for the BMP,
rope as necessary so that the skimmer will settle into the pit after the
keeping in mind the maintenance legacy for the future owners. Make sure the facility maintenance
basin drains. (Adapted from A Manual for Designing, Installing and
agreement includes requirements to ensure vegetation cover in perpetuity.
Maintaining Skimmer Sediment Basins." February, 1999. J. W. Faircloth &
Son).
22. Provide a planting surface that can withstand the compaction of vehicles using maintenance access
7 Earthen spillways - Install the spillway in undisturbed soil. The
roads.
achievement of planned elevations, grade, design width, and entrance and
exit channel slopes are critical to the successful operation of the spillway.
23. If a BMP is likely to receive excessive amounts of deicing salt, salt tolerant plants should be used.
The spillway may be lined with laminated plastic or permeable geotextile
fabric. The fabric must be wide and long enough to cover the bottom and
24. Provide signage to help educate the public and to designate maintenance limits.
sides and extend onto the top of the dam for anchoring in a trench. The
edges may be secured with 12-inch staples or pins. The fabric must be
25. Chose plants to create a diversity of herbaceous, shrub and tree species.
long enough to extend down the slope and exit onto stable ground. The
width of the fabric must be one piece, not joined or spliced; otherwise
26. Preserve existing natural vegetation when possible.
g g p
water can get under the fabric. If the length of the fabric is insufficient
for the entire length of the spillway, multiple sections, spanning the
complete width, may be used. The upper section(s) should overlap the
SOIL:
lower section(s) so that water cannot flow under the fabric. Secure the
upper edge and sides of the fabric in a trench with staples or pins.
It is necessary to test the soil in which you are about to plant in order to determine the following:
(Adopted from A Manual for Designing, Installing and Maintaining Skimmer
Sediment Basins." February, 1999. J. W. Faircloth & Son.).
pH; whether acid, neutral, or alkaline
major soil nutrients; Nitrogen, Phosphorus, Potassium
8. Inlets - Discharge water into the basin in a manner to prevent erosion.
minerals; such as chelated iron, lime
Use temporary slope drains or diversions with outlet protection to divert
sediment laden water to the upper end of the pool area to improve basin
Have soil samples analyzed by experienced and qualified individuals, such as those at the USDA
trap efficiency.
Agricultural Extension Office who will explain in writing the results what the mean as well as what soil
9 P 9 y
9. Erosion control -Construct the structure so that the disturbed area is
amendments would be required. Certain soil conditions, such as marine clays, can present serious
minimized. Divert surface water away from bare areas. Complete the
constraints to the growth of plant materials and may require the guidance of qualified professionals. When
embankment before the area is cleared. Stabilize the emergency spillway
poor soils can not be amended, seed mixes and plant material must be selected to establish ground
embankment and all other disturbed areas above the crest of the principal
cover as quickly as possible.
spillway immediately after construction.
Areas that recently have been involved in construction can become compacted so that plant roots cannot
penetrate the soil. Also seeds will lie on the surface of compacted soils and are often washed away or
10. Install porous baffles as specified in locations shown on plans.
eaten by birds. For planting success, soils should be loosened to a depth of three to five inches. Hard
soils may require disking to a deeper depth. The soil should be loosened regardless of the ground cover.
After all the sediment -producing areas have been permanently
This will improve seed contact with the soil, increase germination rates, and allow the roots to penetrate
stabilized, remove the accumulated silt and dispose properly, bringing the
s t
the soil. For areas to be sodded, diskingis necessary so that the roots can penetrate the soil. Providing
rY P 9
basin to its original desi n volume. Check the operation of the skimmer
9 P
and spillways and make sure all pipes and structures are clear. Dress
good growing conditions can prevent poor vegetative cover. This saves money because vegetation will
basin slopes and sow native grasses and flowers to make the basin as
not need to be replanted.
attractive as possible. Smooth the slopes to blend with the adjoining
areas and stabilize properly and immediately.
Whenever possible, topsoil should be spread to a depth of four to eight inches and lightly compacted to
minimum thickness of four inches. This provides organic matter and important nutrients for the plant
Maintenance
material. The use of topsoil allows vegetation to become established faster and roots to penetrate p g p
Inspect skimmer sediment basins weekly and after each significant
deeper. This ensures quicker and more complete stabilization, making it less likely that the plants will
(one-half inch or greater) rainfall event and repair immediately. Remove
wash out during a heavy storm. If topsoil has been stockpiled in deep mounds for a long period of time,
sediment and restore the basin to its original dimensions when sediment
it is necessary to test
accumulates to one-half the height of the first baffle. Pull the skimmer
the soil for pH as well as microbial activity. If the microbial activity has been destroyed, it is necessary toto one side so that the sediment underneath it can be excavated.
inoculate the soil after application.
Excavate the sediment from the entire basin, not just around the skimmer
or the first cell. Make sure vegetation growing in the bottom of the basin
Remember that newly installed plant material requires water in order to recover from the shock of being
the the baffles if air
does not hold down the skimmer. Repair Y are damaged.
transplanted. Be sure that some source of water is provided, especially during dry periods. This will
Re -anchor the baffles if water IS flowing underneath or around them. If
reduce plant loss and provide the new plant materials with a chance to establish root growth.
the skimmer is clogged with trash and there is water in the basin, usually
jerking on the rope will make the skimmer bob up and down and dislodge
the debris and restore flow. If this does not work, pull the skimmer over
to the side of the basin and remove the debris. Also check the orifice
inside the skimmer to see if it is clogged; if so remove the debris. If the
skimmer arm or barrel pipe is clogged, the orifice can be removed and
BMP PLANTING PLAN
the obstruction cleared with a plumber's snake or by flushing with water.
Be sure and replace the orifice before repositioning the skimmer. Check
the fabric lined spillway for damage and make any required repairs with
fabric that spans the full width of the spillway.
1. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING WORK AS SPECIFIED ON THESE PLANS.
2. CONTRACTOR SHALL NOTIFY THIS OFFICE OF ANY DISCREPANCIES PRIOR TO BEGINNING OR CONTINUING WORK.
3. SIZE OF PLANT MATERIALS SHALL CONFORM WITH THE CURRENT EDITION OF "AMERICAN STANDARD FOR NURSERY
STOCK" FOR NUMBER ONE GRADE NURSERY STOCK AS ADOPTED BY THE AMERICAN ASSOCIATION OF NURSERYMEN AND
AMERICAN NATIONAL STANDARDS INSTITUTE.
4. ALL DISTURBED AREAS ARE TO BE SEEDED OR SODDED UNLESS OTHERWISE NOTED.
5• PLEASE CONTACT LANDSCAPE DESIGNER REGARDING SUBSTITUTIONS.
6. A MINIMUM OF 50 HERBACEOUS PLANTS PER 200 SF OF SHELF AREA SHALL BE PLANTED IN THE SHALLOW WATER
ZONE AND IN THE SHALLOW LAND ZONE. WHERE SHRUBS ARE PROPOSED IN THE SHALLOW LAND ZONE, THEY SHALL BE
IN 1 GALLON CONTAINERS AND SPACED 8 SHRUBS PER 200 SF (5' D.C.).
7• ALL PLANT MATERIALS SHALL BE A NATIVE SPECIES AND PURCHASED FROM A LOCAL SOURCE TO ENSURE
SURVIVABILITY.
8.
SEE SHEET 7 FOR SEEDING SPECIFICATIONS AND ADDITIONAL LANDSCAPING NOTES.
POND PLANTING ZONES
N.T.S.
MAINTENANCE AND OPERATION MANUAL
FOR
PERMANENT EXTENDED DETENTION POND
(MAINTENANCE AND OPERATION ARE THE RESPONSIBILITY OF THE OWNER)
I. Monthly, or after every runoff producing rainfall event,
whichever comes first:
A. Inspect the trash rack; remove accumulated debris,
repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales;
remove trash, and repair eroded areas before the next
rainfall event.
II. Quarterly (Four times a year):
A. Inspect the collection system (i.e. catch basins, piping,
grassed swales) for proper functioning. Accumulated
trash will be cleared from basin grates, basin bottoms,
and piping will be checked for obstructions and cleared
as required.
B. Pond inlet pipes will be checked for undercutting. Riprap
or other energy dissipation structures will be replaced,
and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet
structure will be removed.
B. The fore bay depth will be checked at various points.
C. Grassed swales, including the vegetated filter if applicable,
will be reseeded twice a year as necessary.
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment
removal will occur when the depth is reduced to 75% of
RMANENT POOL the original design depth or 3 ft., whichever is greater.
Sediment must be removed to at least the original design
JD SIDE SLOPE depth.
V. General:
A. Mowing of the side slopes will be accomplished according
to the season. Maximum grass height will be 6 inches.
B. All components of the detention pond system will be kept
in good working order. Repair or replacement components
will meet the original design specifications as per the
approved stormwater plan. If previously approved components
are determined to be ineffective, the component must be
redesigned and/or replaced.
Gupton's Royal
Design Group
CIVIL ENGINEERING - SITE PLANNING
STORMWATER DESIGN
LANDSCAPE DESIGN o LAND SURVEYING
IP
PO BOX 1070
KING, NC 27021
OFFICE 336-985-6519
E-MAIL [e-mail]
CORPORATE LICENSE NO: 0-0423
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PROGRESS
DRAWINGS
GOVERNMENTAL
PERMITS
APPLIED
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DO NOT
USE FOR
CONSTRUCTION
PLAN SCALE: 1:20
REVISIONS:
07101120
BID SET
01115121
SET
08126121
UPDATE
SURVEYED BY. OTHERS
DRAWN BY. DHB
DRAWN BY. MDE
DRAWN BY. BSH
DESIGNED BY. HBG
APPROVED BY. HBG
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SHEET TITLE:
POND #2 PLANTING
= OF 19
DATE: 04101119
PROJECT NO: 12804-19
M

0� 11n M rMl uAMrrAlrrM
IS
STARRUSH WHITETOP
88 SWAMP MILKWEED
GRAPHIC SCALE
20 0 10 20 40
( IN FEET )
1 inch = 20 ft.
80
General Landscaping Guidance for All Stormwater BMPs SEDIMENT / EXTENDED DETENTION BASIN
1. Trees, shrubs, and woody vegetation are not allowed on any embankment impounding water. Construction Specifications
2. Plant trees and shrubs at least 15 feet away from the toe of slope of a dam and at least 25 feet 1. Clear, grub, and strip the area under the embankment of all vegetation
away from a principal spillway structures. and root mat. Remove all surface soil containing high amounts of organic
matter and stockpile or dispose of it properly. Haul all objectionable
3. Trees or shrubs known to have long taproots should not be within the vicinity of the earth dam or material to the designated disposal area.
subsurface drainage facilities. 2. Ensure that fill material for the embankment is free of roots, woody
vegetation, organic matter, and other objectionable material. Place the fill
4. Plant trees and shrubs at least 25 feet away from perforated pipes. in lifts not to exceed 9 inches, and machine compact it. Over fill the
embankment 6 inches to allow for settlement.
5.
Provide 15 foot clearance from a non -clogging, low flow orifice.
3. Shape the basin to the specified dimensions. Excavate a small
6.
Herbaceous embankment plantings should be limited to 10 inches in height.
peninsula about 1.5 feet above the basin bottom around the planned
location of the skimmer to accommodate a concrete slab for the skimmer
to settle on in order to keep grass and debris away from the skimmer.
7.
Use erosion control mats and fabrics in channels to reduce the potential
The slab also allows the skimmer to settle to the bottom and drain the
for
erosion.
entire basin. The additional 1.5 feet excavation will accumulate most of
the sediment and will become the basin bottom. The slab usually holds a
8.
Stabilize all emergency spillways with plant material that can withstand strong flows. Root material
small amount of water that aids in keeping debris away from the skimmer
should be fibrous and substantial but lacking a taproot.
that could clog the screen and inlet.
9.
Divert flows temporarily from seeded areas until stabilized.
4. Place the barrel (outlet pipe) on a firm, smooth foundation of
impervious soil. Do not use pervious material such as sand, gravel, or
10.
Check water tolerances of existingplant materials riot to inundation of area.
p p
crushed stone as backfill around the pipe. Place the fill material around
the pipe spillway in 4-inch layers and compact it under and around the
pipe to at least the same density as the adjacent embankment. Care
11.
Stabilize aquatic and safety benches with emergent wetland plants and wet seed mixes.
must be taken not to raise the pipe from the firm contact with its
foundation when compacting under the pipe haunches. Install anti -seep
12.
Do not block maintenance access to structures with trees or shrubs.
collars as specified slightly down stream from dam centerline. Place a
minimum depth of 2 feet of compacted backfill over the outlet pipe
13.
To reduce thermal warming, shade inflow and outflow channels as well as southern exposures of
before crossing it with construction equipment. In no case should the pipe
ponds.
conduit be installed by cutting a trench through the dam after the
embankment is complete. Install the concrete anti -floatation slab base;
14.
Avoid that intensive (i.e. turf
securely attach the box riser to the base at the proper elevations and
plantings will require routine or chemical applications area).
locations as shown on the plans.
15.
Have soil tested to determine if there is a need for amendments.
5. Assemble the skimmer following the manufacturer's instructions.
16. Native plant species should be specified over exotic or foreign species because they are well
6. Lay the assembled skimmer on the bottom of the basin with the
adapted to local on -site soil and temperature conditions, are beneficial for wildlife, and require little or no
flexible joint at the proper inlet location on the riser. Attach the flexible
additional amendments.
joint to the inlet pipe and position the skimmer over the excavated
peninsula and slob in the basin. The skimmer should settle level across
17. Decrease the areas where managed grass (turf) is used. Use low maintenance ground cover to absorb
the top of the pipe with the door on it, so that the debris guards work.
Otherwise, debris that accumulates around the float will flow under the
run-off.
float and clog the screen, when the water level drops. Adjust the flexible
joint connection if necessary, especially if the skimmer is pulled to the
18. Plant stream and water buffers and filter strips with trees, shrubs, ornamental grasses, and herbaceousside and the inlet pipe is not aligned with the riser. The float is balanced
materials where possible, to stabilize banks and provide shade.
so that the rear settles down as the last few inches of water drain from
the basin. This positions the float and guards to contain floating debris on
19. Maintain and frame desirable views. Be careful not to block views at entrances, exits, or difficult road
the outside of the float as the water level drops. Place a stake at the
curves. Screen unattractive views into the site. Aesthetics and visual characteristics should be second in
connection of the flexible joint so that the bockhoe operator will know the
location when excavating accumulated sediment from under the skimmer
importance only to pollutant removal and runoff control characteristics.
and not damage it. After installing the skimmer, check to make sure the
orifice has not fallen out while moving. Tie a polypropylene rope around
20. Use plants to prohibit pedestrian access to pools or steeper slopes.
the tee between the vent and horizontal tube. Anchor the other end of
the rope to a stake on the embankment or side of the basin. Tension the
21. The designer should carefully consider the long-term vegetation management strategy for the BMP,
rope as necessary so that the skimmer will settle into the pit after the
keeping in mind the maintenance legacy for the future owners. Make sure the facility maintenance
basin drains. (Adapted from A Manual for Designing, Installing and
agreement includes requirements to ensure vegetation cover in perpetuity.
Maintaining Skimmer Sediment Basins." February, 1999. J. W. Faircloth &
Son).
22. Provide a planting surface that can withstand the compaction of vehicles using maintenance access
7 Earthen spillways - Install the spillway in undisturbed soil. The
roads.
achievement of planned elevations, grade, design width, and entrance and
exit channel slopes are critical to the successful operation of the spillway.
23. If a BMP is likely to receive excessive amounts of deicing salt, salt tolerant plants should be used.
The spillway may be lined with laminated plastic or permeable geotextile
fabric. The fabric must be wide and long enough to cover the bottom and
24. Provide signage to help educate the public and to designate maintenance limits.
sides and extend onto the top of the dam for anchoring in a trench. The
edges may be secured with 12-inch staples or pins. The fabric must be
25. Chose plants to create a diversity of herbaceous, shrub and tree species.
long enough to extend down the slope and exit onto stable ground. The
width of the fabric must be one piece, not joined or spliced; otherwise
26. Preserve existing natural vegetation when possible.
g g p
water can get under the fabric. If the length of the fabric is insufficient
for the entire length of the spillway, multiple sections, spanning the
complete width, may be used. The upper section(s) should overlap the
SOIL:
lower section(s) so that water cannot flow under the fabric. Secure the
upper edge and sides of the fabric in a trench with staples or pins.
It is necessary to test the soil in which you are about to plant in order to determine the following:
(Adopted from A Manual for Designing, Installing and Maintaining Skimmer
Sediment Basins." February, 1999. J. W. Faircloth & Son.).
pH; whether acid, neutral, or alkaline
major soil nutrients; Nitrogen, Phosphorus, Potassium
8. Inlets - Discharge water into the basin in a manner to prevent erosion.
minerals; such as chelated iron, lime
Use temporary slope drains or diversions with outlet protection to divert
sediment laden water to the upper end of the pool area to improve basin
Have soil samples analyzed by experienced and qualified individuals, such as those at the USDA
trap efficiency.
Agricultural Extension Office, who will explain in writing the results, what they mean, as well as what soil
g. Erosion control - Construct the structure so that the disturbed area is
amendments would be required. Certain soil conditions, such as marine clays, can present serious
minimized. Divert surface water away from bare areas. Complete the
constraints to the growth of plant materials and may require the guidance of qualified professionals. When
embankment before the area is cleared. Stabilize the emergency spillway
poor soils can not be amended, seed mixes and plant material must be selected to establish ground
embankment and all other disturbed areas above the crest of the principal
cover as quickly as possible.
spillway immediately after construction.
Areas that recently have been involved in construction can become compacted so that plant roots cannot
penetrate the soil. Also seeds will lie on the surface of compacted soils and are often washed away or
10. Install porous baffles as specified in locations shown on plans.
eaten by birds. For planting success, soils should be loosened to a depth of three to five inches. Hard
soils may require disking to a deeper depth. The soil should be loosened regardless of the ground cover.
11. After all the sediment -producing areas have been permanently
This will improve seed contact with the soil, increase germination rates, and allow the roots to penetrate
stabilized, remove the accumulated silt and dispose properly, bringing the
the soil. For areas to be sodded, disking is necessary so that the roots can penetrate the soil. Providing
basin to its original design volume. Check the operation of the skimmer
and spillways and make sure all pipes and structures are clear. Dress
good growing conditions can prevent poor vegetative cover. This saves money because vegetation will
basin slopes and sow native grasses and flowers to make the basin as
not need to be replanted.
attractive as possible. Smooth the slopes to blend with the adjoining
areas and stabilize properly and immediately.
Whenever possible, topsoil should be spread to a depth of four to eight inches and lightly compacted to
minimum thickness of four inches. This provides organic matter and important nutrients for the plant
Maintenance
material. The use of topsoil allows vegetation to become established faster and roots to penetrate
Inspect skimmer sediment basins weekly and after each significant
deeper. This ensures quicker and more complete stabilization, making it less likely that the plants will
(one-half inch or greater) rainfall event and repair immediately. Remove
wash out during a heavy storm. If topsoil has been stockpiled in deep mounds for a long period of time,
sediment and restore the basin to its original dimensions when sediment
it is necessary to test
accumulates to one-half the height of the first baffle. Pull the skimmer
the soil for pH as well as microbial activity. If the microbial activity has been destroyed, it is necessary toto one side so that the sediment underneath it can be excavated.
inoculate the soil after application.
Excavate the sediment from the entire basin, not just around the skimmer
or the first cell. Make sure vegetation growing in the bottom of the basin
Remember that newly installed plant material requires water in order to recover from the shock of being
does not hold down the skimmer. Repair the baffles if they are damaged.
transplanted. Be sure that some source of water is provided, especially during dry periods. This will
Re -anchor the baffles if water IS flowing underneath or around them. If
reduce plant loss and provide the new plant materials with a chance to establish root growth.
the skimmer is clogged with trash and there is water in the basin, usually
jerking on the rope will make the skimmer bob up and down and dislodge
the debris and restore flow. If this does not work, pull the skimmer over
to the side of the basin and remove the debris. Also check the orifice
inside the skimmer to see if it is clogged; if so remove the debris. If the
skimmer arm or barrel pipe is clogged, the orifice can be removed and
BMP PLANTING PLAN
the obstruction cleared with a plumber's snake or by flushing with water.
Be sure and replace the orifice before repositioning the skimmer. Check
the fabric lined spillway for damage and make any required repairs with
fabric that spans the full width of the spillway.
1. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING WORK AS SPECIFIED ON THESE PLANS.
2. CONTRACTOR SHALL NOTIFY THIS OFFICE OF ANY DISCREPANCIES PRIOR TO BEGINNING OR CONTINUING WORK.
3. SIZE OF PLANT MATERIALS SHALL CONFORM WITH THE CURRENT EDITION OF "AMERICAN STANDARD FOR NURSERY
STOCK" FOR NUMBER ONE GRADE NURSERY STOCK AS ADOPTED BY THE AMERICAN ASSOCIATION OF NURSERYMEN AND
AMERICAN NATIONAL STANDARDS INSTITUTE.
4. ALL DISTURBED AREAS ARE TO BE SEEDED OR SODDED UNLESS OTHERWISE NOTED.
5• PLEASE CONTACT LANDSCAPE DESIGNER REGARDING SUBSTITUTIONS.
6. A MINIMUM OF 50 HERBACEOUS PLANTS PER 200 SF OF SHELF AREA SHALL BE PLANTED IN THE SHALLOW WATER
ZONE AND IN THE SHALLOW LAND ZONE. WHERE SHRUBS ARE PROPOSED IN THE SHALLOW LAND ZONE, THEY SHALL BE
IN 1 GALLON CONTAINERS AND SPACED 8 SHRUBS PER 200 SF (5' D.C.).
7• ALL PLANT MATERIALS SHALL BE A NATIVE SPECIES AND PURCHASED FROM A LOCAL SOURCE TO ENSURE
SURVIVABILITY.
8.
SEE SHEET 7 FOR SEEDING SPECIFICATIONS AND ADDITIONAL LANDSCAPING NOTES.
POND PLANTING ZONES
N.T.S.
MAINTENANCE AND OPERATION MANUAL
FOR
PERMANENT EXTENDED DETENTION POND
(MAINTENANCE AND OPERATION ARE THE RESPONSIBILITY OF THE OWNER)
I. Monthly, or after every runoff producing rainfall event,
whichever comes first:
A. Inspect the trash rack; remove accumulated debris,
repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales;
remove trash, and repair eroded areas before the next
rainfall event.
II. Quarterly (Four times a year):
A. Inspect the collection system (i.e. catch basins, piping,
grassed swales) for proper functioning. Accumulated
trash will be cleared from basin grates, basin bottoms,
and piping will be checked for obstructions and cleared
as required.
B. Pond inlet pipes will be checked for undercutting. Riprap
or other energy dissipation structures will be replaced,
and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet
structure will be removed.
B. The fore bay depth will be checked at various points.
C. Grassed swales, including the vegetated filter if applicable,
will be reseeded twice a year as necessary.
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment
removal will occur when the depth is reduced to 75% of
RMANENT POOL the original design depth or 3 ft., whichever is greater.
Sediment must be removed to at least the original design
JD SIDE SLOPE depth.
V. General:
A. Mowing of the side slopes will be accomplished according
to the season. Maximum grass height will be 6 inches.
B. All components of the detention pond system will be kept
in good working order. Repair or replacement components
will meet the original design specifications as per the
approved stormwater plan. If previously approved components
are determined to be ineffective, the component must be
redesigned and/or replaced.
i
Gupton's Royal
Design Group
CIVIL ENGINEERING -SITE PLANNING
STORMWATER DESIGN
LANDSCAPE DESIGN o LAND SURVEYING
IP
PO BOX 1070
KING, NC 27021
OFFICE 336-985-6519
E-MAIL [e-mail]
CORPORATE LICENSE NO: 0-0423
(D
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PROGRESS
DRAWINGS
GOVERNMENTAL
PERMITS
APPLIED
FOR
DO NOT
USE FOR
CONSTRUCTION
PLAN SCALE: 1:20
REVISIONS:
07101120
BID SET
01115121
SET
08126121
UPDATE
SURVEYED BY. OTHERS
DRAWN BY. DHB
DRAWN BY. MDE
DRAWN BY. BSH
DESIGNED BY. HBG
APPROVED BY. HBG
' C A '
:l�L�o'ESS,jOQ�/,
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SHEET TITLE:
POND #3 PLANTING
8.30 OF 19
DATE: 04101119
PROJECT NO: 12804-1951

I%
99 SPOTTED TF
POND 4# VEGETATIVE SHELF: 2340.85 SQ. FT.
50 Wetland Plants per 200 SQ FT: 585.21 REQUIRED PLANTS TOTAL
TOTAL #
SCIENTIFIC NAME
I COMMON NAME
IMINSIZEISOURCE
Wetland Plants Installed: 588
D D
156
Swamp Milkweed
5" Plug
H&H PLANTS, LLC, GARNER, NC
198
Spotted trumpetweed
5" Plug
WETLAND PLANTS INC., EDENTON, NC
234
Starrush Whitetop
5" Plug
WETLAND PLANTS INC., EDENTON, NC
wv VTTr11V11 wuL_r%TVL_w
a
GRAPHIC SCALE
20 0 10 20 40
( IN FEET )
1 inch = 20 ft.
General Landscaping Guidance for All Stormwater BMPs
SEDIMENT / EXTENDED DETENTION BASIN
1. Trees, shrubs, and woody vegetation are not allowed on any embankment impounding water.
Construction Specifications
2. Plant trees and shrubs at least 15 feet away from the toe of slope of a dam and at least 25 feet
1. Clear, grub, and strip the area under the embankment of all vegetation
away from a principal spillway structures.
and root mat. Remove all surface soil containing high amounts of organic
matter and stockpile or dispose of it properly. Haul all objectionable
3. Trees or shrubs known to have long taproots should not be within the vicinity of the earth dam or
material to the designated disposal area.
subsurface drainage facilities.
2. Ensure that fill material for the embankment is free of roots, woody
vegetation, organic matter, and other objectionable material. Place the fill
4. Plant trees and shrubs at least 25 feet away from perforated pipes.
in lifts not to exceed 9 inches, and machine compact it. Over fill the
embankment 6 inches to allow for settlement.
5. Provide 15 foot clearance from a non -clogging, low flow orifice.
3. Shape the basin to the specified dimensions. Excavate a small
6. Herbaceous embankment plantings should be limited to 10 inches in height.
peninsula about 1.5 feet above the basin bottom around the planned
location of the skimmer to accommodate a concrete slab for the skimmer
7. Use erosion control mats and fabrics in channels to reduce the potential
P
to settle on in order to keep grass and debris away from the skimmer.
The slab also allows the skimmer to settle to the bottom and drain the
for erosion.
entire basin. The additional 1.5 feet excavation will accumulate most of
the sediment and will become the basin bottom. The slab usually holds a
8. Stabilize all emergency spillways with plant material that can withstand strong flows. Root material
small amount of water that aids in keeping debris away from the skimmer
should be fibrous and substantial but lacking a taproot.
that could clog the screen and inlet.
9. Divert flows temporarily from seeded areas until stabilized.
4. Place the barrel (outlet pipe) on a firm, smooth foundation of
impervious soil. Do not use pervious material such as sand, gravel, or
10. Check water tolerances of existingplant materials prior to inundation of area.
p p
crushed stone as backfill around the pipe. Place the fill material around
the pipe spillway in 4-inch layers and compact it under and around the
pipe to at least the some density as the adjacent embankment. Care
11. Stabilize aquatic and safety benches with emergent wetland plants and wet seed mixes.
must be taken not to raise the pipe from the firm contact with its
foundation when compacting under the pipe haunches. Install anti -seep
12. Do not block maintenance access to structures with trees or shrubs.
collars as specified slightly down stream from dam centerline. Place a
minimum depth of 2 feet of compacted backfill over the outlet pipe
13. To reduce thermal warming, shade inflow and outflow channels as well as southern exposures of
before crossing it with construction equipment. In no case should the pipe
ponds.
conduit be installed by cutting a trench through the dam after the
embankment is complete. Install the concrete anti -floatation slab base;
14. Avoid plantings that will require routine or intensive chemical applications (i.e. turf area).
securely attach the box riser to the base at the proper elevations and
locations as shown on the plans.
15. Have soil tested to determine if there is a need for amendments.
5. Assemble the skimmer following the manufacturer's instructions.
16. Native plant species should be specified over exotic or foreign species because they are well
6. Lay the assembled skimmer on the bottom of the basin with the
adapted to local on -site soil and temperature conditions, are beneficial for wildlife, and require little or no
flexible joint at the proper inlet location on the riser. Attach the flexible
additional amendments.
joint to the inlet pipe and position the skimmer over the excavated
peninsula and slab in the basin. The skimmer should settle level across
17. Decrease the areas where managed grass (turf) is used. Use low maintenance ground cover to absorb
the top of the pipe with the door on it, so that the debris guards work.
Otherwise, debris that accumulates around the float will flow under the
run-off.
float and clog the screen, when the water level drops. Adjust the flexible
joint connection if necessary, especially if the skimmer is pulled to the
18. Plant stream and water buffers and filter strips with trees, shrubs, ornamental grasses, and herbaceousside and the inlet pipe is not aligned with the riser. The float is balanced
materials where possible, to stabilize banks and provide shade.
so that the rear settles down as the last few inches of water drain from
the basin. This positions the float and guards to contain floating debris on
19. Maintain and frame desirable views. Be careful not to block views at entrances, exits, or difficult road
the outside of the float as the water level drops. Place a stake at the
curves. Screen unattractive views into the site. Aesthetics and visual characteristics should be second in
connection of the flexible joint so that the backhoe operator will know the
location when excavating accumulated sediment from under the skimmer
importance only to pollutant removal and runoff control characteristics.
and not damage it. After installing the skimmer, check to make sure the
orifice has not fallen out while moving. Tie a polypropylene rope around
20. Use plants to prohibit pedestrian access to pools or steeper slopes.
the tee between the vent and horizontal tube. Anchor the other end of
the rope to a stake on the embankment or side of the basin. Tension the
21. The designer should carefully consider the long-term vegetation management strategy for the BMP,
rope as necessary so that the skimmer will settle into the pit after the
keeping in mind the maintenance legacy for the future owners. Make sure the facility maintenance
basin drains. (Adapted from A Manual for Designing, Installing and
agreement includes requirements to ensure vegetation cover in perpetuity.
Maintaining Skimmer Sediment Basins." February, 1999. J. W. Faircloth &
Son).
22. Provide a planting surface that can withstand the compaction of vehicles using maintenance access
7. Earthen spillways - Install the spillway in undisturbed soil. The
roads.
achievement of planned elevations, grade, design width, and entrance and
exit channel slopes are critical to the successful operation of the spillway.
23. If a BMP is likely to receive excessive amounts of deicing salt, salt tolerant plants should be used.
The spillway may be lined with laminated plastic or permeable geotextile
fabric. The fabric must be wide and long enough to cover the bottom and
24. Provide signage to help educate the public and to designate maintenance limits.
sides and extend onto the top of the dam for anchoring in a trench. The
edges may be secured with 12-inch staples or pins. The fabric must be
25. Chose plants to create a diversity of herbaceous, shrub and tree species.
long enough to extend down the slope and exit onto stable ground. The
width of the fabric must be one piece, not joined or spliced; otherwise
26. Preserve existing natural vegetation when possible.
g g p
water can get under the fabric. If the length of the fabric is insufficient
for the entire length of the spillway, multiple sections, spanning the
complete width, may be used. The upper section(s) should overlap the
SOIL:
lower section(s) so that water cannot flow under the fabric. Secure the
upper edge and sides of the fabric in a trench with staples or pins.
It is necessary to test the soil in which you are about to plant in order to determine the following:
(Adopted from A Manual for Designing, Installing and Maintaining Skimmer
Sediment Basins." February, 1999. J. W. Faircloth & Son.).
pH; whether acid, neutral, or alkaline
major soil nutrients; Nitrogen, Phosphorus, Potassium
8. Inlets - Discharge water into the basin in a manner to prevent erosion.
minerals; such as chelated iron, lime
Use temporary slope drains or diversions with outlet protection to divert
sediment laden water to the upper end of the pool area to improve basin
Have soil samples analyzed by experienced and qualified individuals, such as those at the USDA
trap efficiency.
Agricultural Extension Office, who will explain in writing the results, what they mean, as well as what soil
g. Erosion control - Construct the structure so that the disturbed area is
amendments would be required. Certain soil conditions, such as marine clays, can present serious
minimized. Divert surface water away from bare areas. Complete the
constraints to the growth of plant materials and may require the guidance of qualified professionals. When
embankment before the area is cleared. Stabilize the emergency spillway
poor soils can not be amended, seed mixes and plant material must be selected to establish ground
embankment and all other disturbed areas above the crest of the principal
cover as quickly as possible.
spillway immediately after construction.
Areas that recently have been involved in construction can become compacted so that plant roots cannot
penetrate the soil. Also seeds will lie on the surface of compacted soils and are often washed away or
10. Install porous baffles as specified in locations shown on plans.
eaten by birds. For planting success, soils should be loosened to a depth of three to five inches. Hard
soils may require disking to a deeper depth. The soil should be loosened regardless of the ground cover.
11 After all the sediment -producing areas have been permanently
This will improve seed contact with the soil, increase germination rates, and allow the roots to penetrate
stabilized, remove the accumulated silt and dispose properly, bringing the
basin to its original design volume. Check the operation of the skimmer
the soil. For areas to be sodded, disking is necessary so that the roots can penetrate the soil. Providing
and spillways and make sure all pipes and structures are clear. Dress
good growing conditions can prevent poor vegetative cover. This saves money because vegetation will
basin slopes and sow native grasses and flowers to make the basin as
not need to be replanted.
attractive as possible. Smooth the slopes to blend with the adjoining
areas and stabilize properly and immediately.
Whenever possible, topsoil should be spread to a depth of four to eight inches and lightly compacted to
minimum thickness of four inches. This provides organic matter and important nutrients for the plant
Maintenance
material. The use of topsoil allows vegetation to become established faster and roots to penetrate
Inspect skimmer sediment basins weekly and after each significant
deeper. This ensures quicker and more complete stabilization, making it less likely that the plants will
(one-half inch or greater) rainfall event and repair immediately. Remove
wash out during a heavy storm. If topsoil has been stockpiled in deep mounds for a long period of time,
sediment and restore the basin to its original dimensions when sediment
it is necessary to test
accumulates to one-half the height of the first baffle. Pull the skimmer
the soil for pH as well as microbial activity. If the microbial activity has been destroyed, it is necessary toto one side so that the sediment underneath it can be excavated.
inoculate the soil after application.
Excavate the sediment from the entire basin, not just around the skimmer
or the first cell. Make sure vegetation growing in the bottom of the basin
Remember that newly installed plant material requires water in order to recover from the shock of being
does not hold down the skimmer. Repair the baffles if they are damaged.
transplanted. Be sure that some source of water is provided, especially during dry periods. This will
Re -anchor the baffles if water IS flowing underneath or around them. If
reduce plant loss and provide the new plant materials with a chance to establish root growth.
the skimmer is clogged with trash and there is water in the basin, usually
jerking on the rope will make the skimmer bob up and down and dislodge
the debris and restore flow. If this does not work, pull the skimmer over
to the side of the basin and remove the debris. Also check the orifice
inside the skimmer to see if it is clogged; if so remove the debris. If the
skimmer arm or barrel pipe is clogged, the orifice can be removed and
BMP PLANTING PLAN
the obstruction cleared with a plumber's snake or by flushing with water.
Be sure and replace the orifice before repositioning the skimmer. Check
the fabric lined spillway for damage and make any required repairs with
fabric that spans the full width of the spillway.
1. THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING WORK AS SPECIFIED ON THESE PLANS.
2. CONTRACTOR SHALL NOTIFY THIS OFFICE OF ANY DISCREPANCIES PRIOR TO BEGINNING OR CONTINUING WORK.
3. SIZE OF PLANT MATERIALS SHALL CONFORM WITH THE CURRENT EDITION OF "AMERICAN STANDARD FOR NURSERY
STOCK" FOR NUMBER ONE GRADE NURSERY STOCK AS ADOPTED BY THE AMERICAN ASSOCIATION OF NURSERYMEN AND
AMERICAN NATIONAL STANDARDS INSTITUTE.
4. ALL DISTURBED AREAS ARE TO BE SEEDED OR SODDED UNLESS OTHERWISE NOTED.
5• PLEASE CONTACT LANDSCAPE DESIGNER REGARDING SUBSTITUTIONS.
6• A MINIMUM OF 50 HERBACEOUS PLANTS PER 200 SF OF SHELF AREA SHALL BE PLANTED IN THE SHALLOW WATER
ZONE AND IN THE SHALLOW LAND ZONE. WHERE SHRUBS ARE PROPOSED IN THE SHALLOW LAND ZONE, THEY SHALL BE
IN 1 GALLON CONTAINERS AND SPACED 8 SHRUBS PER 200 SF (5' D.C.).
7• ALL PLANT MATERIALS SHALL BE A NATIVE SPECIES AND PURCHASED FROM A LOCAL SOURCE TO ENSURE
SURW VABILI TY.
8.
SEE SHEET 7 FOR SEEDING SPECIFICATIONS AND ADDITIONAL LANDSCAPING NOTES.
80
POND PLANTING ZONES
N.T.S.
MAINTENANCE AND OPERATION MANUAL
FOR
PERMANENT EXTENDED DETENTION POND
(MAINTENANCE AND OPERATION ARE THE RESPONSIBILITY OF THE OWNER)
I. Monthly, or after every runoff producing rainfall event,
whichever comes first:
A. Inspect the trash rack; remove accumulated debris,
repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales;
remove trash, and repair eroded areas before the next
rainfall event.
II. Quarterly (Four times a year):
A. Inspect the collection system (i.e. catch basins, piping,
grassed swales) for proper functioning. Accumulated
trash will be cleared from basin grates, basin bottoms,
and piping will be checked for obstructions and cleared
as required.
B. Pond inlet pipes will be checked for undercutting. Riprop
or other energy dissipation structures will be replaced,
and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet
structure will be removed.
B. The fore bay depth will be checked at various points.
C. Grassed swales, including the vegetated filter if applicable,
will be reseeded twice a year as necessary.
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment
removal will occur when the depth is reduced to 75% of
RMANENT POOL the original design depth or 3 ft., whichever is greater.
Sediment must be removed to at least the original design
ID SIDE SLOPE depth.
V. General:
A. Mowing of the side slopes will be accomplished according
to the season. Maximum grass height will be 6 inches.
B. All components of the detention pond system will be kept
in good working order. Repair or replacement components
will meet the original design specifications as per the
approved stormwater plan. If previously approved components
are determined to be ineffective, the component must be
redesigned and/or replaced.
Gupton's Royal
Design Group
CIVIL ENGINEERING -SITE PLANNING
STORMWATER DESIGN
LANDSCAPE DESIGN o LAND SURVEYING
V
PO BOX 1070
KING, NC 27021
OFFICE 336-985-6519
E-MAIL [e-mail]
CORPORATE LICENSE NO: C-0423
(D
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PROGRESS
DRAWINGS
GOVERNMENTAL
PERMITS
APPLIED
FOR
DO NOT
USE FOR
CONSTRUCTION
PLAN SCALE: 1:20
REVISIONS:
07101120
BID SET
01115121
SET
08/26/21
UPDATE
SURVEYED BY. OTHERS
DRAWN BY. DHB
DRAWN BY. MDE
DRAWN BY. BSH
DESIGNED BY. HBG
APPROVED BY. HBG
CA
10
360 -
y9,Q��0
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SHEET TITLE:
POND #4 PLANTING
8.40 OF 19
DATE: 04101119
PROJECT NO: 12804-19

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150 SWAMP MILKWEED
190 STARRUSH WHITETOP
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GRAPHIC
( IN FEET )
1 inch = 20 ft.
General Landscaping Guidance for All Stormwater BMPs SEDIMENT / EXTENDED DETENTION BASIN
1. Trees, shrubs, and woody vegetation are not allowed on any embankment impounding water. Construction Specifications
2. Plant trees and shrubs at least 15 feet away from the toe of slope of a dam and at least 25 feet 1. Clear, grub, and strip the area under the embankment of all vegetation
away from a principal spillway structures. and root mat. Remove all surface soil containing high amounts of organic
matter and stockpile or dispose of it properly. Haul all objectionable
3. Trees or shrubs known to have long taproots should not be within the vicinity of the earth dam or material to the designated disposal area.
subsurface drainage facilities. 2. Ensure that fill material for the embankment is free of roots, woody
vegetation, organic matter, and other objectionable material. Place the fill
4. Plant trees and shrubs at least 25 feet away from perforated pipes. in lifts not to exceed 9 inches, and machine compact it. Over fill the
embankment 6 inches to allow for settlement.
5.
Provide 15 foot clearance from a non -clogging, low flow orifice.
3. Shape the basin to the specified dimensions. Excavate a small
6.
Herbaceous embankment plantings should be limited to 10 inches in height.
peninsula about 1.5 feet above the basin bottom around the planned
location of the skimmer to accommodate a concrete slab for the skimmer
to settle on in order to keep grass and debris away from the skimmer.
7.
Use erosion control mats and fabrics in channels to reduce the potential
P
The slab also allows the skimmer to settle to the bottom and drain the
for
erosion.
entire basin. The additional 1.5 feet excavation will accumulate most of
the sediment and will become the basin bottom. The slab usually holds a
8.
Stabilize all emergency spillways with plant material that can withstand strong flows. Root material
small amount of water that aids in keeping debris away from the skimmer
should be fibrous and substantial but lacking a taproot.
that could clog the screen and inlet.
9.
Divert flows temporarily from seeded areas until stabilized.
4. Place the barrel (outlet pipe) on a firm, smooth foundation of
impervious soil. Do not use pervious material such as sand, gravel, or
10.
Check water tolerances of existingplant materials riot to inundation of area.
p p
crushed stone as backfill around the pipe. Place the fill material around
the pipe spillway in 4-inch layers and compact it under and around the
pipe to at least the same density as the adjacent embankment. Care
11.
Stabilize aquatic and safety benches with emergent wetland plants and wet seed mixes.
must be taken not to raise the pipe from the firm contact with its
foundation when compacting under the pipe haunches. Install anti -seep
12.
Do not block maintenance access to structures with trees or shrubs.
collars as specified slightly down stream from dam centerline. Place a
minimum depth of 2 feet of compacted backfill over the outlet pipe
13.
To reduce thermal warming, shade inflow and outflow channels as well as southern exposures of
before crossing it with construction equipment. In no case should the pipe
ponds.
conduit be installed by cutting a trench through the dam after the
embankment is complete. Install the concrete anti -floatation slab base;
14.
Avoid that intensive (i.e. turf
securely attach the box riser to the base at the proper elevations and
plantings will require routine or chemical applications area).
locations as shown on the plans.
15.
Have soil tested to determine if there is a need for amendments.
5. Assemble the skimmer following the manufacturer's instructions.
16. Native plant species should be specified over exotic or foreign species because they are well
6. Lay the assembled skimmer on the bottom of the basin with the
adapted to local on -site soil and temperature conditions, are beneficial for wildlife, and require little or no
flexible joint at the proper inlet location on the riser. Attach the flexible
additional amendments.
joint to the inlet pipe and position the skimmer over the excavated
peninsula and slob in the basin. The skimmer should settle level across
17. Decrease the areas where managed grass (turf) is used. Use low maintenance ground cover to absorb
the top of the pipe with the door on it, so that the debris guards work.
Otherwise, debris that accumulates around the float will flow under the
run-off.
float and clog the screen, when the water level drops. Adjust the flexible
joint connection if necessary, especially if the skimmer is pulled to the
18. Plant stream and water buffers and filter strips with trees, shrubs, ornamental grasses, and herbaceousside and the inlet pipe is not aligned with the riser. The float is balanced
materials where possible, to stabilize banks and provide shade.
so that the rear settles down as the last few inches of water drain from
the basin. This positions the float and guards to contain floating debris on
19. Maintain and frame desirable views. Be careful not to block views at entrances, exits, or difficult road
the outside of the float as the water level drops. Place a stake at the
curves. Screen unattractive views into the site. Aesthetics and visual characteristics should be second in
connection of the flexible joint so that the bockhoe operator will know the
location when excavating accumulated sediment from under the skimmer
importance only to pollutant removal and runoff control characteristics.
and not damage it. After installing the skimmer, check to make sure the
orifice has not fallen out while moving. Tie a polypropylene rope around
20. Use plants to prohibit pedestrian access to pools or steeper slopes.
the tee between the vent and horizontal tube. Anchor the other end of
the rope to a stake on the embankment or side of the basin. Tension the
21. The designer should carefully consider the long-term vegetation management strategy for the BMP,
rope as necessary so that the skimmer will settle into the pit after the
keeping in mind the maintenance legacy for the future owners. Make sure the facility maintenance
basin drains. (Adapted from A Manual for Designing, Installing and
agreement includes requirements to ensure vegetation cover in perpetuity.
Maintaining Skimmer Sediment Basins." February, 1999. J. W. Faircloth &
Son).
22. Provide a planting surface that can withstand the compaction of vehicles using maintenance access
7. Earthen spillways - Install the spillway in undisturbed soil. The
roads.
achievement of planned elevations, grade, design width, and entrance and
exit channel slopes are critical to the successful operation of the spillway.
23. If a BMP is likely to receive excessive amounts of deicing salt, salt tolerant plants should be used.
The spillway may be lined with laminated plastic or permeable geotextile
fabric. The fabric must be wide and long enough to cover the bottom and
24. Provide signage to help educate the public and to designate maintenance limits.
sides and extend onto the top of the dam for anchoring in a trench. The
edges may be secured with 12-inch staples or pins. The fabric must be
25. Chose plants to create a diversity of herbaceous, shrub and tree species.
long enough to extend down the slope and exit onto stable ground. The
width of the fabric must be one piece, not joined or spliced; otherwise
26. Preserve existing natural vegetation when possible.
g g p
water can get under the fabric. If the length of the fabric is insufficient
for the entire length of the spillway, multiple sections, spanning the
complete width, may be used. The upper section(s) should overlap the
SOIL:
lower section(s) so that water cannot flow under the fabric. Secure the
upper edge and sides of the fabric in a trench with staples or pins.
It is necessary to test the soil in which you are about to plant in order to determine the following:
(Adopted from A Manual for Designing, Installing and Maintaining Skimmer
Sediment Basins." February, 1999. J. W. Faircloth & Son.).
pH; whether acid, neutral, or alkaline
major soil nutrients; Nitrogen, Phosphorus, Potassium
8. Inlets - Discharge water into the basin in a manner to prevent erosion.
minerals; such as chelated iron, lime
Use temporary slope drains or diversions with outlet protection to divert
sediment laden water to the upper end of the pool area to improve basin
Have soil samples analyzed by experienced and qualified individuals, such as those at the USDA
trap efficiency.
Agricultural Extension Office, who will explain in writing the results, what they mean, as well as what soil
g. Erosion control - Construct the structure so that the disturbed area is
amendments would be required. Certain soil conditions, such as marine clays, can present serious
minimized. Divert surface water away from bare areas. Complete the
constraints to the growth of plant materials and may require the guidance of qualified professionals. When
embankment before the area is cleared. Stabilize the emergency spillway
poor soils can not be amended, seed mixes and plant material must be selected to establish ground
embankment and all other disturbed areas above the crest of the principal
cover as quickly as possible.
spillway immediately after construction.
Areas that recently have been involved in construction can become compacted so that plant roots cannot
penetrate the soil. Also seeds will lie on the surface of compacted soils and are often washed away or
10. Install porous baffles as specified in locations shown on plans.
eaten by birds. For planting success, soils should be loosened to a depth of three to five inches. Hard
soils may require disking to a deeper depth. The soil should be loosened regardless of the ground cover.
After all the sediment -producing areas have been permanently
This will improve seed contact with the soil, increase germination rates, and allow the roots to penetrate
s t
stabilized, remove the accumulated silt and dispose properly, bringing the
the soil. For areas to be sodded, disking is necessary so that the roots can penetrate the soil. Providing
basin to its original design volume. Check the operation of the skimmer
and spillways and make sure all pipes and structures are clear. Dress
good growing conditions can prevent poor vegetative cover. This saves money because vegetation will
basin slopes and sow native grasses and flowers to make the basin as
not need to be replanted.
attractive as possible. Smooth the slopes to blend with the adjoining
areas and stabilize properly and immediately.
Whenever possible, topsoil should be spread to a depth of four to eight inches and lightly compacted to
minimum thickness of four inches. This provides organic matter and important nutrients for the plant
Maintenance
material. The use of topsoil allows vegetation to become established faster and roots to penetrate
Inspect skimmer sediment basins weekly and after each significant
deeper. This ensures quicker and more complete stabilization, making it less likely that the plants will
(one-half inch or greater) rainfall event and repair immediately. Remove
wash out during a heavy storm. If topsoil has been stockpiled in deep mounds for a long period of time,
sediment and restore the basin to its original dimensions when sediment
it is necessary to test
accumulates to one-half the height of the first baffle. Pull the skimmer
the soil for pH as well as microbial activity. If the microbial activity has been destroyed, it is necessary toto one side so that the sediment underneath it can be excavated.
inoculate the soil after application.
Excavate the sediment from the entire basin, not just around the skimmer
or the first cell. Make sure vegetation growing in the bottom of the basin
Remember that newly installed plant material requires water in order to recover from the shock of being
does not hold down the skimmer. Repair the baffles if they are damaged.
transplanted. Be sure that some source of water is provided, especially during dry periods. This will
Re -anchor the baffles if water IS flowing underneath or around them. If
reduce plant loss and provide the new plant materials with a chance to establish root growth.
the skimmer is clogged with trash and there is water in the basin, usually
jerking on the rope will make the skimmer bob up and down and dislodge
the debris and restore flow. If this does not work, pull the skimmer over
to the side of the basin and remove the debris. Also check the orifice
inside the skimmer to see if it is clogged; if so remove the debris. If the
skimmer arm or barrel pipe is clogged, the orifice can be removed and
BMP PLANTING PLAN
the obstruction cleared with a plumber's snake or by flushing with water.
Be sure and replace the orifice before repositioning the skimmer. Check
the fabric lined spillway for damage and make any required repairs with
fabric that spans the full width of the spillway.
THE LANDSCAPE CONTRACTOR IS RESPONSIBLE FOR IMPLEMENTING WORK AS SPECIFIED ON THESE PLANS.
CONTRACTOR SHALL NOTIFY THIS OFFICE OF ANY DISCREPANCIES PRIOR TO BEGINNING OR CONTINUING WORK.
SIZE OF PLANT MATERIALS SHALL CONFORM WITH THE CURRENT EDITION OF "AMERICAN STANDARD FOR NURSERY
STOCK" FOR NUMBER ONE GRADE NURSERY STOCK AS ADOPTED BY THE AMERICAN ASSOCIATION OF NURSERYMEN AND
AMERICAN NATIONAL STANDARDS INSTITUTE.
ALL DISTURBED AREAS ARE TO BE SEEDED OR SODDED UNLESS OTHERWISE NOTED.
PLEASE CONTACT LANDSCAPE DESIGNER REGARDING SUBSTITUTIONS.
A MINIMUM OF 50 HERBACEOUS PLANTS PER 200 SF OF SHELF AREA SHALL BE PLANTED IN THE SHALLOW WATER
ZONE AND IN THE SHALLOW LAND ZONE. WHERE SHRUBS ARE PROPOSED IN THE SHALLOW LAND ZONE, THEY SHALL BE
IN 1 GALLON CONTAINERS AND SPACED 8 SHRUBS PER 200 SF (5' D.C.).
ALL PLANT MATERIALS SHALL BE A NATIVE SPECIES AND PURCHASED FROM A LOCAL SOURCE TO ENSURE
SURVIVABILITY.
�9X�9:1���lYil:�9��.If.�reLy�x9f�c�l rrc.1.�l.`L�.9.z�.1.Irrcl.7���1►9►LY�11�1►�1e1►�[.�rX.�
POND PLANTING ZONES
N.T.S.
MAINTENANCE AND OPERATION MANUAL
FOR
PERMANENT EXTENDED DETENTION POND
(MAINTENANCE AND OPERATION ARE THE RESPONSIBILITY OF THE OWNER)
I. Monthly, or after every runoff producing rainfall event,
whichever comes first:
A. Inspect the trash rack; remove accumulated debris,
repair/replace if it is not functioning.
B. Inspect and clear the orifice of any obstructions.
C. Inspect the pond side slopes and grassed inlet swales;
remove trash, and repair eroded areas before the next
rainfall event.
II. Quarterly (Four times a year):
A. Inspect the collection system (i.e. catch basins, piping,
grassed swales) for proper functioning. Accumulated
trash will be cleared from basin grates, basin bottoms,
and piping will be checked for obstructions and cleared
as required.
B. Pond inlet pipes will be checked for undercutting. Riprap
or other energy dissipation structures will be replaced,
and broken pipes will be repaired.
III. Semi-annually (twice a year):
A. Accumulated sediment from the bottom of the outlet
structure will be removed.
B. The fore bay depth will be checked at various points.
C. Grassed swales, including the vegetated filter if applicable,
will be reseeded twice a year as necessary.
IV. Annually (Once a year):
A. The pond depth will be checked at various points. Sediment
removal will occur when the depth is reduced to 75% of
RMANENT POOL the original design depth or 3 ft., whichever is greater.
Sediment must be removed to at least the original design
JD SIDE SLOPE depth.
V. General:
A. Mowing of the side slopes will be accomplished according
to the season. Maximum grass height will be 6 inches.
B. All components of the detention pond system will be kept
in good working order. Repair or replacement components
will meet the original design specifications as per the
approved stormwater plan. If previously approved components
are determined to be ineffective, the component must be
redesigned and/or replaced.
Gupton's Royal
Design Group
CIVIL ENGINEERING - SITE PLANNING
STORMWATER DESIGN
LANDSCAPE DESIGN o LAND SURVEYING
RDG
PO BOX 1070
KING, NC 27021
OFFICE 336-985-6519
E-MAIL [e-mail]
CORPORATE LICENSE NO: 0-0423
(D
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J O
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12
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Y
PROGRESS
DRAWINGS
GOVERNMENTAL
PERMITS
APPLIED
FOR
DO NOT
USE FOR
CONSTRUCTION
PLAN SCALE: 1:20
REVISIONS:
07101120
BID SET
01/15/21
SET
08/26/21
UPDATE
SURVEYED BY. OTHERS
DRAWN BY. DHB
DRAWN BY. MDE
DRAWN BY. BSH
DESIGNED BY. HBG
APPROVED BY. HBG
CA
opt/,
:Q
= E _
360
SHEET TITLE:
POND #5 PLANTING
M OF 19
DATE: 04101119
PROJECT NO: 12804-19
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