P1102_Amend 0007_Drawings3of3.pdf

VICINITY MAP LOCATION MAP

SITE OF OPERATIONS

BUILDING

SITE OF TYPE G AND CLWS

MAGAZINES

SITE OF TYPE H

MAGAZINE

SITE OF TRUCK

INSPECTION AND

SENTRY BUILDING

VISITOR

ENTRANCEPROJECT SITE

NAVAL SUBMARINE BASE NEW LONDON, GROTON, CONNECTICUT

NAVAL FACILITIES ENGINEERING COMMAND MID-ATLANTIC

NAVFAC FACILITIES ENGINEERING AND ACQUISITION DIVISION (FEAD)

WETLAND MITIGATION

P-1102 WEAPONS MAGAZINE & ORDNANCE OPERATIONS FACILITY

NEK

FAX: 571.218.1600

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HPN

1667770

APPROVED BY LCDR ELIZABETH

OLOKODE NAVFAC NLOD FEAD

DIRECTOR NEW LONDON, GROTEN, CT

05/27/2025

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WETLAND MITIGATION AREAS

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FAX: 571.218.1600

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JWJ

HPN

1667770

APPROVED BY LCDR ELIZABETH

OLOKODE NAVFAC NLOD FEAD

DIRECTOR NEW LONDON, GROTEN, CT

05/27/2025

OFF-SITE AREAS

PROJECT DESCRIPTION

1. THE P-1102 NEW LONDON WEAPONS COMPOUND MAGAZINE

RECAPITALIZATION PROJECT WILL REPLACE 18 EXISTING MAGAZINES

WITH 6 CONTAINERIZED LONG WEAPONS STORAGE (CLWS), 2 TYPE G

MAGAZINES, 1 TYPE H MAGAZINE, REPLACE BUILDING 524 (ORDNANCE

OPERATIONS BUILDING), AND REPLACE BUILDING 393 (TRUCK

INSPECTION AND SENTRY BUILDING).

2. THE PROJECT IS LOCATED WITHIN THE EXISTING WEAPONS STORAGE

COMPOUND LOCATED AT THE NORTHERN END OF THE NAVAL

SUBMARINE BASE NEW LONDON ALONG TRITON DRIVE.

GENERAL E & S NOTES

1. THE US GOVERNMENT IS THE OWNER OF RECORD ASSOCIATED WITH

THIS PROJECT.

2. THE GENERAL CONTRACTOR IS THE OPERATOR OF THE SITE AND

RESPONSIBLE FOR PROVIDING AND MAINTAINING EROSION AND

SEDIMENT CONTROL MEASURES DURING CONSTRUCTION

OPERATIONS.

3. PROVIDE SEDIMENT AND EROSION CONTROLS IN ACCORDANCE WITH

THE CONNECTICUT GUIDELINES FOR SOIL EROSION AND SEDIMENT

CONTROL, LATEST EDITION; AND THE CONTRACT DOCUMENTS.

4. KEEP A COPY OF THE GUIDELINES ON-SITE FOR REFERENCE DURING

CONSTRUCTION.

MONITORING & MAINTENANCE

1. E&S PLAN AND REVISIONS MUST IDENTIFY AN AGENT OR AGENTS WHO

HAVE THE RESPONSIBILITY AND AUTHORITY FOR THE IMPLEMENTATION,

OPERATION, MONITORING AND MAINTENANCE OF E&S MEASURES. SUCH

AGENT(S) MUST BE FAMILIAR WITH EACH CONTROL MEASURE USED

INCLUDING ITS LIMITATIONS, INSTALLATION, INSPECTION AND

MAINTENANCE. WHEN CONTROL MEASURES FAIL, OR ARE FOUND

INEFFECTIVE, SUCH AGENT(S) MUST COORDINATE PLAN REVISIONS

WITH A PROFESSIONAL EXPERIENCED IN EROSION AND SEDIMENT

CONTROL AND APPROVING AGENCY, WHEN THAT AGENCY’S APPROVAL

IS REQUIRED. SUCH AGENT(S) MUST HAVE THE ADDITIONAL

RESPONSIBILITY FOR ENSURING EROSION AND SEDIMENT CONTROLS

ARE INSTALLED AND MAINTAINED ACCORDING TO STATE OF

CONNECTICUT STANDARDS. INSPECT CONSTRUCTION SITE BEFORE

PREDICTED MAJOR STORMS. A MAJOR STORM IS DEFINED AS A STORM

PREDICTED BY THE NATIONAL OFFICE OF ATMOSPHERIC

ADMINISTRATION (NOAA) WEATHER SERVICE WITH WARNINGS OF

FLOODING, SEVERE THUNDERSTORMS OR SIMILARLY SEVERE WEATHER

CONDITIONS OR EFFECTS.

2. EACH MEASURE REQUIRE INSPECTIONS AT LEAST ONCE A WEEK AND

WITHIN 24 HOURS OF THE END OF A STORM WITH A RAINFALL AMOUNT

OF 0.5 INCH OR GREATER.

BEST MANAGEMENT PRACTICES

1. DEWATERING - THE REMOVAL OF WATER BY PUMPING, INFILTRATION,

OPEN AIR DRYING OR OTHER METHODS; DRAINAGE OF THE SOIL

PROFILE.

2. GEOTEXTILE - FABRIC OR SYNTHETIC MATERIAL PLACED (1) BETWEEN

THE SOIL AND A PIPE, GABION, STONE, OR RETAINING WALL TO

ENHANCE WATER MOVEMENT AND/OR RETARD SOIL MOVEMENT, (2) AS

A BLANKET OR MAT TO ADD REINFORCEMENT AND/OR SEPARATION (3)

TO PROVIDE AN ABOVE GROUND SEDIMENT BARRIER.

3. GEOTEXTILE SILT FENCE - A TEMPORARY SEDIMENT BARRIER

CONSISTING OF A GEOTEXTILE FABRIC PULLED TAUT AND ATTACHED TO

SUPPORTING POSTS AND ENTRENCHED.

4. PERMANENT STABILIZATION - ESTABLISHMENT OF PERMANENT STAND

OF GRASS AND/OR LEGUMES BY SEEDING AND MULCHING EXPOSED

SOILS WITH A SEED MIXTURE FOR LONG TERM STABILIZATION ON

DISTURBED OR ERODIBLE SOILS THAT HAVE BEEN BROUGHT TO FINAL

GRADE.

5. TEMPORARY STABILIZATION - ESTABLISHMENT OF TEMPORARY STAND

OF GRASS AND/OR LEGUMES BY SEEDING AND MULCHING SOILS THAT

WILL BE EXPOSED FOR A PERIOD GREATER THAN 1 MONTH BUT LESS

THAN 12 MONTHS.

SOILS

THERE ARE MULTIPLE SOIL TYPES FOUND AT THE SITE. THE SOILS ARE

IDENTIFIED ON THE EROSION AND SEDIMENT CONTROL PLAN. THESE SOILS

ARE LISTED BELOW:

73C - CHARLTON-CHATFIELD COMPLEX, 0 TO 15 % SLOPES, VERY ROCKY

PROPERTIES AND QUALITIES

HYDROLOGIC SOIL GROUP: B

75E - HOLLIS-CHATFIELD-ROCK OUTCROP COMPLEX, 3 TO 15 % SLOPES

PROPERTIES AND QUALITIES

HYDROLOGIC SOIL GROUP: D

306 - UDORTHENTS-URBAN LAND COMPLEX

PROPERTIES AND QUALITIES

HYDROLOGIC SOIL GROUP: B

EXISTING CONDITIONS

1. THE UNDEVELOPED PORTIONS OF NAVAL SUBMARINE BASE NEW

LONDON ARE WOODED. THE CLEAR ZONE AROUND THE SECURITY

FENCE IS MOWED GRASS. INSIDE THE SECURITY FENCE IS PRIMARILY

DEVELOPED WITH EXISTING STRUCTURES, PAVEMENT, AND SOME

GRAVEL.

2. WETLANDS ARE LOCATED WITHIN THE PROJECT SITE LOCATED ON THE

EAST SIDE OF THE WEAPONS STORAGE COMPOUND.

3. PROJECT SITE AND DISTURBANCE IS LOCATED WITHIN THE SECURE

PERIMETER OF NAVAL SUBMARINE BASE NEW LONDON.

MANAGEMENT STATEGIES

1. CONSTRUCTION MUST BE SEQUENCED SO THAT GRADING

OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE.

2. AREAS WHICH ARE NOT TO BE DISTURBED MUST BE CLEARLY MARKED

BY SIGNS, FLAGS, ETC.

MATERIALS

1. EROSION & SEDIMENT CONTROL MATERIALS MUST MEET THE

REQUIREMENTS OF THE CONNECTICUT GUIDELINES FOR SOIL EROSION

AND SEDIMENT CONTROL, LATEST EDITION.

1. PROVIDE REQUIRED PERMITS AND EROSION AND SEDIMENT CONTROL

ASSOCIATED WITH OFF-SITE BORROW OR SPOIL AREAS.

1. FLAG LIMITS OF CONSTRUCTION NECESSARY TO FACILITATE THE PRE-CONSTRUCTION MEETING.

2. HOLD PRE-CONSTRUCTION MEETING ONSITE WITH CONTRACTOR, NAVFAC, AND ENVIRONMENTAL LEAD.

3. WETLAND MITIGATION MUST BE PROVIDED BETWEEN DELINEATED WETLAND LINE AND UPLAND EDGE. THE ENVIRONMENTAL LEAD WILL MARK TREES GREATER THAN 6" DIAMETER AT BREAST HEIGHT AND PROTECT THEM FROM REMOVAL. MATURE TREES MUST BE SAVED AND INCORPORATED INTO THE WETLAND

MITIGATION.

4. PROVIDE EROSION AND SEDIMENT CONTROLS AND TREE PROTECTION DEVICES IN ACCORDANCE WITH THE PLANS.

5. PREPARE SUB-BASE, SLOPES, AND OTHER AREA OF DISTURBANCE FOR FINAL GRADING.

6. GRADE MICROTOPOGRAPHY IN ACCORDANCE WITH THE PLANS.

7. MITIGATION AREAS MUST BE GRADED SO THAT FINISHED GRADE MEETS THE EXISTING WETLAND ELEVATIONS.

8. TREE AND SHRUB SPECIES MUST BE PLANTED ON-CENTER, AS PROVIDED IN THE PLANS. SPACING REFERS TO DIAGONAL MEASUREMENT BETWEEN PLANTS, AS SHOWN. PLANTING LOCATIONS MY BE ADJUSTED IN THE FIELD IN CONSULTATION WITH THE ENVIRONMENTAL LEAD.

9. SUBMIT PROPOSED PLANTING MEDIUM SPECIFICATION TO THE ENVIRONMENTAL LEAD FOR APPROVAL PRIOR TO INSTALLATION.

10. PLANT CONTAINER BOUND TREE AND SHRUB SPECIES WITHOUT GUY SUPPORT.

11. SHRUBS MUST HAVE A WARRANTY FOR PLANT GROWTH TO BE IN VIGOROUS GROWING CONDITION FOR A MINIMUM 12 MONTH PERIOD, WHICH MUST BE PROVIDED REGARDLESS OF THE CONTRACT PERIOD. FURNISHED SHRUBS MUST BE MAINTAINED AS NECESSARY DURING THE WARRANTY PERIOD, WHICH MUST INCLUDE BUT NOT TO BE LIMITED TO STRAIGHTENING PLANT MATERIAL, STRAIGHTENING STAKES, CORRECTING GIRDLING, SUPPLEMENTING MULCH PRUNING DEAD OR BROKEN BRANCH TIPS, MAINTAINING PLANT MATERIAL LABELS, ERADICATING WEEDS, INSECTS AND DISEASE. AT THE END OF THE WARRANTY PERIOD, A FINAL INSPECTION MUST BE PERFORMED ON FURNISHED PLANT MATERIAL. THE CONTRACTOR AND ENVIRONMENTAL LEAD WILL CONDUCT THE INSPECTION.

PLANT MATERIAL THAT IS DETERMINED TO BE UNHEALTHY MUST BE IMMEDIATELY REPLACED BY THE CONTRACTOR.

12. AT THE END OF EACH WORK DAY, THE CONTRACTOR MUST MAKE REASONABLE EFFORTS TO KEEP THE WORK AREA CLEAN AND FREE OF CONSTRUCTION DEBRIS, RUBBISH, SPOILS, TRASH, AND OTHER FOREIGN MATERIALS. RUBBISH, DEBRIS AND LIKE MATERIALS MUST BE DISPOSED OF IN ACCORDANCE WITH RULES AND REGULATIONS OF THE JURISDICTIONAL AUTHORITY, INCLUDING ENVIRONMENTAL REGULATIONS.

13. ADDITIONAL EROSION CONTROLS MUST BE INSTALLED AS CONDITIONS WARRANT, OR AS DIRECTED BY THE ENVIRONMENTAL LEAD.

14. DURING CONSTRUCTION, THE CONTRACTOR IS RESPONSIBLE FOR EROSION CONTROL MAINTENANCE AND MUST INSPECT AND/OR REPLACE CONTROLS, AS

NEEDED.

15. THE CONTRACTOR IS RESPONSIBLE FOR MAINTAINING RUNOFF FLOW DURING STORMS AND PERIODS OF RAINFALL.

16. MAINTAIN MITIGATION AREAS, PROVIDING IDENTIFIED AND REQUIRED MAINTENANCE, AS WELL AS REPLACE PLANTINGS THAT HAVE NOT SURVIVED FOR LENGTH

OF CONSTRUCTION PLUS AN ADDITIONAL 1 YEAR AFTER CONSTRUCTION COMPLETION.

CONSTRUCTION SEQUENCE

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GRAPHIC SCALE

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LEGEND

SENTRY BUILDING

(BLDG B)

EXST-001

(A114)

TYPE H-001

EXST-002

(A113)

TYPE

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CLWS-001

CLWS-002

CLWS-003

CLWS-004

CLWS-005

CLWS-006

SURVEY LIMITS

A1 WETLAND MITIGATION PLAN - OVERALL

1" = 100'

1. EXISTING CONTOURS ARE BASED ON 20XX US ARMY CORPS OF

ENGINEERS (USACE) NCMP TOPOBATHY LIDAR, DOWNLOADED FROM

THE NATIONAL OCEANIC AND ATMOSPHERIC ASSOCIATION (NOAA) ON

XXXX XX, XXXX (https://coast.noaa.gov/dataviewer/#/lidar/search/).

2. VERTICAL DATUM IS NAVD 88.

3. DIMENSIONS ARE US SURVEY FEET UNLESS NOTED OTHERWISE.

FAX: 571.218.1600

1100 NORTH GLEBE ROAD

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JWJ

HPN

1667770

APPROVED BY LCDR ELIZABETH

OLOKODE NAVFAC NLOD FEAD

DIRECTOR NEW LONDON, GROTEN, CT

05/27/2025

STREAM DELINEATION FLAG

DELINEATION FLAG HUNG OVER OBSERVED

AVINIZIS' FLAG

WETLAND DELINEATION FLAG

PROPOSED MITIGATION AREAS

OTHER DELINEATED WETLANDS

PROJECT LOD

PROPOSED MITIGATION AREA

DELINEATED WETLANDS 4-9-2026

LOD

C1

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.6%

GENERAL SHEET NOTES

GRAPHIC SCALE

KEYED NOTES

1. MITIGATION AREA = 30,171 SF

2. MITIGATION AREA = 30,813 SF

3. PROVIDE EROSION CONTROL BLANKET ON SLOPES STEEPER THAN 4

HORIZONTAL TO 1 VERTICAL, REFER TO A1/CE501

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LEGEND

A1 NORTH MITIGATION AREA SECTION A-A

1" = 15' (HORZ.)

1. EXISTING CONTOURS ARE BASED ON U.S. ARMY CORPS OF ENGINEERS

(USACE) NCMP TOPOBATHY LIDAR, DOWNLOADED FROM THE

NATIONAL OCEANIC AND ATMOSPHERIC ASSOCIATION (NOAA)

(https://coast.noaa.gov/dataviewer/#/lidar/search/).

2. VERTICAL DATUM IS NAVD 88.

3. DIMENSIONS ARE US SURVEY FEET UNLESS NOTED OTHERWISE.

4. PROVIDE MICROTOPOGRAPHIC RELIEF IN ADDITION TO THE FINISHED

GRADE INDICATED TO CREATE LOCALIZED HUMMOCKS, TUSSOCKS,

AND VARIABILITY TO PROMOTE SUCCESS OF PLANTING, PLUGS, AND

SEEDING.

5. PROVIDE MICROTOPOGRAPHY BETWEEN THE 80 TO 75 CONTOURS IN

THE NORTH MITIGATION AREA AND THE 76 TO 70 CONTOURS IN THE

SOUTH MITIGATION AREA, REFER TO A1/CE502.

6. PROVIDE DEWATERING STRCTURES OUTSIDE OF DELINEATED

WETLANDS AND MITIGATION AREAS., REFER TO C4/CE501.

COORDINATE LOCATIONS WITH THE DOR, ENVIRONMENTAL LEAD, AND

CONTRACTING OFFICER.

7. PROVIDE EROSION CONTROL PROTECTION ON STOCKPILED SOIL

MATERIAL, REFER TO C2/CE501.

8. REFER TO C1/CE502 FOR PLANTING REQUIREMENTS WITHIN THE

MITIGATION AREAS.

FAX: 571.218.1600

1100 NORTH GLEBE ROAD

SUITE 500

ARLINGTON, VIRGINIA 22201

571.218.1000

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SMS/CWJ

JWJ

HPN

1667770

APPROVED BY LCDR ELIZABETH

OLOKODE NAVFAC NLOD FEAD

DIRECTOR NEW LONDON, GROTEN, CT

05/27/2025

C1 NORTH MITIGATION AREA

1" = 50'

A3 SOUTH MITIGATION AREA SECTION B-B

1" = 15' (HORZ.)

C3 SOUTH MITIGATION AREA

1" = 50'

1" = 5' (VERT.) 1" = 5' (VERT.)

WETLAND DELINEATION FLAG

PROPOSED MITIGATION AREAS

SILT FENCE, REFER TO C1/CE501

PROPOSED MITIGATION AREA

DELINEATED WETLANDS 4-9-2026

W1-85

W1-86 W1-87

W1-88 W1-89

W1-90

W1-91

W1-92

W1-93 W1-59

W1-60

W1-61

W1-62

W1-63

W1-64 W1-65

W1-66 W1-67

W1-68 W1-69

W1-70

W1-71

W1-72

W1-73

W1-74

W1-75 W1-77

W1-78

W1-44 W1-43

W1-42

W1-41

W1-40

W1-39

W1-94 W1-95

W1-96 W1-97

MITIGATION

AREA = 30,813 SF

SF

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CE501

FAX: 571.218.1600

1100 NORTH GLEBE ROAD

SUITE 500

ARLINGTON, VIRGINIA 22201

571.218.1000

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PM/DM

BRANCH MANAGER

CHIEF ENG/ARCH

FIRE PROTECTION

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SMS/CWJ

JWJ

HPN

1667770

APPROVED BY LCDR ELIZABETH

OLOKODE NAVFAC NLOD FEAD

DIRECTOR NEW LONDON, GROTEN, CT

05/27/2025

A

SECTION A

1. PROVIDE WING WHEN FENCE IS MORE THAN 4' FROM TOP

OF SLOPE AND FENCE LINE GRADIENT IS 5% OR MORE.

2. FASTEN GEOTEXTILE FABRIC FENCE TO WOOD STAKE

JOINTS ONLY AT SUPPORT POSTS WITH MIN. 6" OVERLAP,

SECURELY SEALED

3. WOOD STAKE MIN. DIMENSIONS 1.5" x 1.5" x 42"

4. EXCAVATE TRENCH 6" x 6" MIN.

5. BACKFILL AND COMPACT OVER GEOTEXTILE FABRIC

FENCE WITH SOIL

6. BURY BOTTOM OF GEOTEXTILE FENCE 6" BELOW

FINISHED GRADE

7. GEOTEXTILE FABRIC FENCE

8. PROVIDE A 5' POST SPACING ON SLOPES 2:1 OR

STEEPER

ISOMETRIC VIEW

3 7

4 510'-0"

MAX.

ELEVATION

" M

IN

6"

" M

IN

FLOW

FLOW

GEOTEXTILE SILT FENCE

SCALE: NTS CE501CE301

C1

GENERAL NOTES:

1. TAPE OR WEIGH DOWN SEAMS FULL LENGTH. PROVIDE MINIMUM 12" OVERLAP ON

SEAMS.

2. ON SEAMS PARALLEL TO SLOPE CONTOUR PLACE UPHILL SHEET OVER DOWNHILL

SHEET.

3. DO NOT ALLOW SURFACE RUN-OFF TO RUN UNDER PLASTIC COVERING.

4. CONTROL DRAINAGE FROM AREAS COVERED BY REINFORCED PLASTIC SHEETING SO

NO DISCHARGE OCCURS DIRECTLY ONTO UNCONTROLLED DISTURBED AREAS OF THE

CONSTRUCTION SITE.

5. MAINTAIN SAND BAGS IN PLACE WITH ROPE.

1. REINFORCED BLACK PLASTIC

COVERING, 6 MIL MINIMUM

2. 10'-0" MAX.

3. SAND BAGS, TYP.

4. EXISTING GROUND

5. TEMPORARY STOCKPILED

MATERIAL

6. 2H:1V MAXIMUM SLOPE

7. GRASS LINED DITCH AROUND

STOCKPILE, 2H:1V MAXIMUM SIDE

SLOPES, TYP.

3'-0" TYP.

5 6

4 7

TEMPORARY STOCKPILE COVERING

SCALE: NTS CE501CE301

C2

EROSION CONTROL BLANKET

FOR STEEP SLOPES

SCALE: NTS CE501CE301

A1

PROPOSED DEWATERING

STRUCTURE

SCALE: NTS CE501CE301

C4

ISOMETRIC VIEW

GENERAL NOTES

1. PROVIDE MATTING WITH SHEAR STRESS STRENGTH FOR THE APPLICATION.

2. PROVIDE SOIL STABILIZATION MATTING MADE OF OPEN WEAVE, BIODEGRADABLE FIBERS OR ELEMENTS OF UNIFORM THICKNESS AND DISTRIBUTION THROUGHOUT. IF PRESENT, NETTING MUST BE EXTRUDED PLASTIC WITH A MAXIMUM MESH OPENING OF 2x2 INCHES AND SUFFICIENTLY BONDED

OR SEWN ON 2 INCH CENTERS ALONG LONGITUDINAL AXIS OF THE MATERIAL TO PREVENT

SEPARATION OF THE NET FROM THE PARENT MATERIAL.

3. SECURE MATTING USING WOOD STAKES.

4. PERFORM FINAL GRADING, TOPSOIL APPLICATION, SEEDBED PREPARATION, AND PERMANENT SEEDING. PLACE MATTING WITHIN 48 HOURS OF COMPLETING SEEDING OPERATIONS, UNLESS END OF WORKDAY STABILIZATION IS SPECIFIED ON THE APPROVED EROSION AND SEDIMENT CONTROL PLAN.

5. UNROLL MATTING DOWN SLOPE. LAY MATTING SMOOTHLY AND FIRMLY UPON THE SEEDED SURFACE.

AVOID STRETCHING THE MATTING.

6. OVERLAP OR ABUT EDGES OF MATTING ROLLS PER MANUFACTURER RECOMMENDATIONS. OVERLAP ROLL ENDS BY 6 INCHES (MINIMUM), WITH THE UPSTREAM MAT OVERLAPPING ON TOP OF THE DOWN

SLOPE MAT.

7. KEY IN TOP OF SLOPE END OF MAT 6 INCHES (MINIMUM) BY DIGGING A TRENCH, PLACING THE MATTING ROLL END IN THE TRENCH, STAPLING THE MAT IN PLACE, REPLACING THE EXCAVATED

MATERIAL, AND TAMPING TO SECURE THE MAT END IN THE KEY.

8. STAKE MAT IN A STAGGERED PATTERN ON 4 FOOT (MAXIMUM) CENTERS THROUGHOUT AND 2 FOOT

(MAXIMUM) CENTERS ALONG SEAMS, JOINTS, AND ROLL ENDS.

9. IF SPECIFIED BY THE MANUFACTURER, AND DEPENDING ON THE TYPE OF MAT BEING PROVIDED, ONCE MATTING IS KEYED AND STAPLED IN PLACE, FILL MAT VOIDS WITH TOP SOIL OR GRANULAR MATERIAL AND LIGHTLY COMPACT OR ROLL TO MAXIMIZE SOIL/MAT CONTACT WITHOUT CRUSHING

MAT.

6" DEEP (MIN.)

KEY IN TRENCH

OVERLAP OR ABUT

ROLL EDGES (TYP.)

6" MIN. OVERLAB

AT ROLL END (TYP.)

1. PREPARED SLOPE WITH SEED IN PLACE

2. FILL MAT VOIDS, REFER TO NOTE 9

GENERAL NOTES

1. TIGHTLY SEAL SLEEVE AROUND PUMP DISCHARGE HOSE WITH A STRAP OR SIMILAR DEVICE.

2. PLACE FILTER BAG ON BASE (E.G., MULCH, LEAF/WOOD COMPOST, WOOD CHIPS, SAND, OR STRAW BALES) LOCATED ON A LEVEL OR 5%

MAXIMUM SLOPING SURFACE. DISCHARGE TO A STABILIZED AREA. EXTEND BASE A MINIMUM OF 12" FROM EDGES OF BAG.

3. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE WITHIN THE FILTER BAG IN ACCORDANCE WITH THE MANUFACTURER

RECOMMENDATIONS. AS BAG FILLS WITH SEDIMENT, REDUCE PUMPING RATE.

4. REMOVE AND DISPOSE OF FILTER BAG UPON COMPLETION OF PUMPING OPERATIONS OR AFTER BAG HAS REACHED CAPACITY, WHICHEVER OCCURS FIRST. SPREAD DE-WATERED SEDIMENT FROM BAG IN AN APPROVED UPLAND AREA AND STABILIZE WITH SEED AND MULCH BY END OF WORK DAY. RESTORE SURFACE AREA BENEATH BAG TO ORIGINAL CONDITION UPON REMOVAL OF DEVICE.

5. USE NON-WOVEN GEOTEXTILE WITH DOUBLE STITCHED SEAMS USING HIGH STRENGTH THREAD. SIZE SLEEVE TO ACCOMMODATE A MAXIMUM 4" DIAMETER PUMP DISCHARGE HOSE. BAG MUST BE MANUFACTURED FROM NON-WOVEN GEOTEXTILE THAT MEETS OR

EXCEEDS MINIMUM AVERAGE ROLL VALUES (MARV) FOR THE FOLLOWING:

GRAB TENSILE 250 LB ASTM D-4632

PUNCTURE 150 LB ASTM D-4833

FLOW RATE 70 GAL/MIN/FT² ASTM D-4491

PERMITTIVITY (SEC-1) 1.2 SEC-1 ASTM D-4491

UV RESISTANCE 70% STRENGTH @ 500 HOURS ASTM D-4355

APPARENT OPENING SIZE 0.15-0.18 MM ASTM D-4751

SEAM STRENGTH 90% ASTM D-4632

6. REPLACE FILTER BAG IF BAG CLOGS OR HAS RIPS, TEARS, OR PUNCTURES. DURING OPERATION KEEP CONNECTION BETWEEN PUMP

HOSE AND FILTER BAG WATER TIGHT. REPLACE BEDDING IF IT BECOMES DISPLACED.

ELEVATION

PLAN VIEW

FILTER BAG

FLOW

FLOW

M

IN

SLOPE

5% MAX.FILTER BAG

8" MIN.

1. STRAP

2. PUMP DISCHARGE

HOSE

3. NON-WOVEN

GEOTEXTILE FABRIC

ON MULCH,

LEAF/COMPOST,

WOOD CHIPS, OR

SAND

4. STRAW BALES

5. NON-WOVEN

GEOTEXTILE FABRIC

6. STAKE GEOTEXTILE

TO STRAW BALES

NOTE: PROVIDE AND MAINTAIN GATOR BAGS OR SIMILAR

FOR ALL TREES THROUGH ESTABLISHMENT PERIOD

TREE AND SHRUB PLANTING

SCALE: NTS CE501CE502

A3

1. MULCH MUST NOT TOUCH PLAN STEM

2. 3" MULCH

3. 3 WIRE TIES AND HOSES/TREE

POSITION BETWEEN 50-75% TREE

HEIGHT

4. (3) - 4" U CHANNEL STEEL POSTS IN

COLOR GREEN

5. 4" MULCH SAUCER

6. FINISHED GRADE

7. REMOVE BURLAP FROM TOP 3

4 OF

ROOT BALL

8. BACKFILL MIX

9. UNAMENDED NATIVE SOIL

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AROUND ROOT BALL

6"

9ROOT BALL DIA.

MIN. 12" AROUND

ROOT BALL

TREE

SHRUB

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CE502

FAX: 571.218.1600

1100 NORTH GLEBE ROAD

SUITE 500

ARLINGTON, VIRGINIA 22201

571.218.1000

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CHIEF ENG/ARCH

FIRE PROTECTION

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SMS/CWJ

JWJ

HPN

1667770

APPROVED BY LCDR ELIZABETH

OLOKODE NAVFAC NLOD FEAD

DIRECTOR NEW LONDON, GROTEN, CT

05/27/2025

MICROTOPOGRAPHIC GRADING

SCALE: NTS CE502CE301

A1

1. HUMMOCKS 1' TO 2' ABOVE FINISHED GRADE (TYP.)

2. PLANT TREES AND SHRUBS ON TOP OF HUMMOCKS

3. AVERAGE OF 1' BACKFILL WITH ORGANIC SOIL AND 1'

BACKFILL WITH STRUCTURAL FILL

7' TO 12' (TYP.)

5' BUFFER

7' TO 12' (TYP.) 7' TO 12' (TYP.)

6' TO 10' (TYP.) 6' TO 10' (TYP.) 6' TO 10' (TYP.)

DIRECTION OF

WETLAND FLOW

3:13:1 3:1

3 4

PLANTING PLAN

SCALE: NTS CE502CE301

C1

PLANTINGS FOR MITIGATION AREAS

STRATUM SPECIES SIZE PLANTING SPECIFICATIONS APPROXIMATE

QUANTITIES PREFERENCES

TREES

RED MAPLE (Acer Rubrum) 4-6' ROOT BALL SPACED APPROXIMATELY 10 FEET APART 40 FULL SUN TO FULL SHADE

YELLOW BIRCH (Betula alleghaniensis) 4-6' ROOT BALL SPACED APPROXIMATELY 10 FEET APART 40 FULL SUN TO PARTIAL SHADE

SHRUBS

SILKY DOGWOOD (Cornus amomum) 2-3' ROOT BALL SPACED APPROXIMATELY 6 FEET APART 50 FULL SUN TO PARTIAL SHADE

HIGHBUSH BLUEBERRY

(Vaccinium corymbosum) 2-3' ROOT BALL SPACED APPROXIMATELY 6 FEET APART 50 FULL SUN TO PARTIAL SHADE

NORTHERN ARROWWOOD

(Viburnum dentatum) 2-3' ROOT BALL SPACED APPROXIMATELY 6 FEET APART 50 FULL SUN TO FULL SHADE

NANNYBERRY (Viburnum lentago) 2-3' ROOT BALL SPACED APPROXIMATELY 6 FEET APART 50 FULL SUN TO FULL SHADE

STEEPLEBUSH (Spiraea tomentosa) 2-3' ROOT BALL SPACED APPROXIMATELY 6 FEET APART 50 FULL SUN

FERNS SENSITIVE FERN (Onoclea sensibilis) #1 CONTAINERS PLANTED IN MASSES, 18" OFF-CENTER 500 CONTAINERS FULL SUN TO FULL SHADE

HERBACEOUS LURID SEDGE (Carex lurida) 2" PLUGS 40,000 PLUGS/ACRE 20,000 PLUGS FULL SUN TO PARTIAL SHADE

SEED MIX NEW ENGLAND WETLANDS

PLANTS WETMIX N/A 1 LB./2,500 SQ. FT. OR 18 LBS./ACRE ~25 POUNDS (24.39 POUNDS) N/A

GENERAL NOTES:

1. SPLIT EVENLY IN QUANTITIES A MIX OF SPECIES IN THE TREE, SHRUB, AND HERBACEOUS STRATUMS BETWEEN THE NORTH AND SOUTH MITIGATION AREAS. TREES AND SHRUBS SPECIES MUST BE PLANTED BELOW THE 83 FOOT CONTOUR IN THE NORTH MITIGATION AREA AND THE 78 FOOT CONTOUR IN THE SOUTH MITIGATION AREA. STAKE THE LOCATION OF EACH, INDIVIDUAL TREE AND SHRUB FOR DOR, CONTRACTING OFFICER, AND

ENVIRONMENTAL LEAD REVIEW AND APPROVAL PRIOR TO INSTALLATION.

2. FERN AND HERBACEOUS SPECIES MUST OVERLAP TREES AND SHRUBS BY PLANTING ABOVE THE 82 FOOT CONTOUR IN THE NORTH MITIGATION AREA AND 77 FOOT CONTOUR IN THE SOUTH MITIGATION AREA. EQUAL QUANTITIES OF FERNS AND PLUGS MUST BE EVENLY DISPERSED AMONG THE NORTH AND SOUTH MITIGATION AREAS. PROVIDE AN OVERLAP BETWEEN THE STRATUMS TO PROVIDE ADDED VARIABILITY, RESILIENCY, PROMOTE SUCCESSIONAL GROWTH BEYOND A SCRUB-SHRUB WETLAND IN THE WESTERN PORTIONS, AND EMERGENT WETLAND IN THE EASTERN

PORTIONS.

3. PLANTS MUST BE OBTAINED FROM LOCAL NATIVE NURSERIES. PROVIDE LOCALLY SOURCED PLANTS FOR BETTER PERFORMANCE AND ARE ADAPTED TO LOCAL AND REGIONAL CONDITIONS. SEEDS MUST BE OBTAINED FROM LOCAL SOURCES TO REPRESENT NATIVE SPECIES. IN ADDITION TO THE PLANTINGS, SEEDING MUST OCCUR IN THE HABITAT TYPE SCRUB-SHRUB WETLAND AND THE EMERGENT WETLAND. SEED AREAS

IMMEDIATELY AFTER FINAL GRADING TO PROVIDE IMMEDIATE NATIVE COVER.

4. SOILS FOR THE SITE ARE ANTICIPATED TO BE A FINE LOAMY MATERIAL SUITABLE FOR THE PLANTINGS. ONCE FINISHED GRADE IS ACHIEVED, THE FINAL GRADE MUST REMAIN ROUGH TO PROVIDE VOIDS AND MICROTOPOGRAPHY FOR PLANTINGS, PLUGS, SEED ESTABLISHMENT, AND MICROHABITATS FOR AMPHIBIAN AND REPTILIAN POPULATIONS TO PROMOTE HABITAT DIVERSITY.

5. ELEVATION RANGE FOR THE PROPOSED PLANTINGS MUST OVERLAP TO PROVIDE A MIX OF SHRUB SPECIES.

6. OVERLAP OF SPECIES MUST ENHANCE SPECIES SURVIVAL WITH SEASONAL VARIATIONS IN THE RANGE OF HYDROLOGICAL INFLUENCE AND CREATE MICROHABITATS. PLANTS MUST BE ESTABLISHED AT THE PREFERRED SATURATED REGIME WITH AN EXPECTED NATURAL DIE-OFF AFTER PLANTING. PROVIDE SUPPLEMENTAL PLANTING TO ACHIEVE NATURAL VEGETATIVE AERIAL COVER.

7. REFER TO A3/CE501 FOR PLANTING DETAILS.

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2026-06-12T09:16:34-0400

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2026-06-12T09:16:46-0400