Green Village Drawings.pdf

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

SCALE: 1"=2000'

PROJECT AREA

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Copyright © 2020 by EWINGCOLE

SCALE: 1"=300'

MATHIAS

LAB

SERC

ADMINISTRATION

BUILDING

JA

V

A F

A R

M R

O A

D

C O

N T E

E S

W H

A R

F R

O A

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SCHMIDT

BUILDING

PROPOSED

GREEN

VILLAGE

PROJECT

EX. SWM POND

approved by email approved by email approved by email approved by email approved by email

HayDav Typewriter approved by email

E

W

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T

C

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S D

S D

CONC.

EXISTING BUILDING (TRAILER)

F.F.=53.91'

B.F.=43.42'

OVERHANG

CONC.

CoB (B)

DnB (D

UxB (C)

UxB (C

CoB (B)

CoB (B

DnB (D

12" TREE

18" TREE

20" TREE

18" TREE

18" TREE

24" OAK

12" TREE

TWIN

40" TREE

E D

G E

O F

P A

V E

M

E N

T

GATE

EX. HC SIGNS

E

X

R

W

GATE

CONC. PORCH

E X

W

C

O

N

C

S

W

W A

L L

EXISTING

SHED

EX.

BLDG

F.F.=53.92'

EXISTING BUILDING

OVERHANG

EXISTING BUILDING

F.F.=52.66'

18" TREE

12" TREE

TWIN

12" TREE

18" TREE

15" TREE

24" TREE

18" TREE

20" TREE

12" TREE

18" TREE

20" TREE

TWIN

18" TREE

18" TREE

I N

V E

R

T

SIGN

SECURITY

D

I

T

C

H

SIGN

RESEARCH

PARKING

E X

W

E

X

R

W

E

X

R

E X

R

W

E

X

R

W

M

E D

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O

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U

N P

A V

D

CONC.

E D

P

A V

E M

E N

T

E

W

M

W

M

W

M

WALL

S D

S D

E

D

U

N

P

A

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E D

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N P

A V

T

TMH TOP

EL=47.19'

RIP RAP

AC

H

E

D

C m

A (C

D nB

(D

15" TREE

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EX. WOODLAND PARKING

(ASPHALT)

E

M

A

B

A

N

D

E

L

E

E

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EXISTING BUILDING TR

EXISTING BUILDING TR

EX. GRAVEL DRAIN TBRM

E X

P

A V

E R

S

T

B R

M

E X

P

A V

E R

S T

B R

M

PAVEMENT TBRM

AND REPLACED

EX. LIGHT POLE

TBRL SEE SITE PLAN

& UTILITY PLAN

EXISTING UTILITY YARD TR

E D

U

N P

A V

T

R

E D

U

N P

A V

T

R

EXISTING CLEAN OUT

EXISTING SIGN

EXISTING ELECTRIC HAND HOLE

EXISTING POWER POLE

EXISTING LIGHT POLE

EXISTING TREE

125 MAGNETIC NAIL SET

445402.449 1440298.949

43.45'

PT. #

NORTHING EASTING

ELEV.

DESCRIPTION

TRAVERSE TABLE

445323.038

1439760.943 39.03'

MAGNETIC NAIL SET

502 MAGNETIC NAIL SET

445778.484 1439817.529

101.10'

503 MAGNETIC NAIL SET

445709.883 1440130.529

63.50'

MAGNETIC NAIL SET445592.779 1440306.266

58.60'

507 MAGNETIC NAIL SET445283.267

1439958.233

35.66'

501 MAGNETIC NAIL SET

445575.858 1439614.323

72.79'

500 MAGNETIC NAIL SET

445454.500 1439620.460

53.08'

GENERAL NOTES:

1. THE SURVEY INFORMATION SHOWN HEREON HAS BEEN COLLECTED IN ACCORDANCE

WITH THE MARYLAND MINIMUM STANDARDS OF PRACTICE, ADOPTED BY THE BOARD FOR

PROFESSIONAL LAND SURVEYORS (COMAR 09.13.06.04) AND SUPPLEMENTED WITH GIS

INFORMATION PROVIDED BY OTHERS.

2. ALL MEASUREMENTS SHOWN HEREON REPRESENT GROUND MEASUREMENTS.

3. BEARINGS, DISTANCES AND COORDINATES SHOWN HEREON ARE BASED UPON THE

NORTH AMERICAN DATUM OF 1983.

4. ELEVATIONS SHOWN HEREON ARE BASED UPON THE NORTH AMERICAN VERTICAL DATUM

OF 1988 (NAVD 88). BENCHMARKS ARE AS FOLLOWS:

5. WETLAND DELINEATION WAS PREPARED BY ECO-SCIENCE PROFESSIONALS,INC IN

AUGUST 2018.

6. FIELD SURVEY WAS COMPLETED BY DEWBERRY ON JANUARY 20, 2017 & SUPPLEMENTED

ON JUNE 25, 2019

7. TOTAL DISTURBED AREA = 1.38 AC.

8. THERE ARE EXISTING WETLANDS PRESENT ON THE EAST SIDE OF THE SITE.

9. THE SITE IS NOT WITHIN THE 100-YEAR FLOODPLAIN, PER FEMA FIRM #24003CO243F

10. THE SITE IS NOT WITHIN THE CHESAPEAKE BAY CRITICAL AREA.

11. THERE ARE NO KNOWN HISTORIC RESOURCES OR CEMETERIES WITHIN THE LIMITS OF

DISTURBANCE

COORDINATE

DEMOLITION WITH BGE

EX. CONDUIT TBRM OR

ABANDONED

NOTE: THIS PLAN IS FOR DEMOLITION ONLY

EX. CONDITION/DEMOLITION NOTES:

1. VISIBLE ABOVE GROUND UTILITIES HAVE BEEN SHOWN. SUBSURFACE UTILITIES, WHERE SHOWN, FOLLOW ASCE 38-02 QUALITY LEVELS A-D. A: VISUALLY VERIFIED VIA TEST HOLES; B: DESIGNATED

AND SURVEYED; C: RECORD INFORMATION CORRELATED WITH SURVEYED SURFACE FEATURES; D:

RECORD INFORMATION ONLY. WHERE SUBSURFACE UTILITIES HAVE BEEN APPARENTLY DESIGNATED

BY OTHERS ON SITE, THOSE LOCATIONS WILL BE SHOWN AS QUALITY LEVEL C. UTILITIES MAY EXIST

THAT ARE NOT SHOWN. UNLESS OTHERWISE LABELED AS ABOVE, THIS SURVEY REPRESENTS

QUALITY LEVEL C.

2. FOR DISPOSITION OF EXTERIOR MECHANICAL/ELECTRICAL EQUIPMENT, REFER TO ELECTRICAL

PLANS.

3. THIS PLAN IS FOR IDENTIFIED SITE FEATURES ONLY AND DOES NOT ADDRESS VEGETATION BEYOND

GENERAL CLEARING.

4. CONTRACTOR TO ABANDON UTILITIES IN PLACE AS NOTED ON THIS PLAN. IF EXISTING UTILITIES ARE

IN CONFLICT WITH PROPOSED DESIGN, THEY MAY BE REMOVED AND TRENCHES BACKFILLED TO

GRADE.

5. CONTRACTOR SHALL COORDINATE RELOCATION OR REMOVAL/DISPOSAL OF EXISTING BUILDINGS

SHOWN "TO BE REMOVED" OR "TO BE RELOCATED" WITH COTR. ONCE EXISTING BUILDINGS HAVE

BEEN REMOVED OR RELOCATED, CONTRACTOR SHALL REMOVE ASSOCIATED CONCRETE SLABS. IF

CONCRETE SLAB REMAINS FROM THE SHED NEXT TO THE EX. TRAILER, CONTRACTOR SHALL BE

RESPONSIBLE FOR ITS REMOVAL.

6. WHEN LODGE IS CONSTRUCTED IN THE FUTURE, THERE WILL BE A PARKING REDUCTION OF 5

SPACES DUE TO LODGE ACCESS, DROP OFF, AND HANDICAP SPACE ACCOMMODATIONS. FOR THE

INFRASTRUCTURE PACKAGE (THIS CONTRACT), PARKING TO BE RE-STRIPED TO ACCOMMODATE

FUTURE PARKING LAYOUT. SEE SITE PLAN, SHEET C-1-2.

7. REMOVE AND REPLACE EX. PAVEMENT AS SHOWN.

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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ABBREVIATIONS:

TBRL - TO BE RELOCATED

TBRM - TO BE REMOVED

TR - TO REMAIN

SHED TBRL. SEE EX.

COND/DEMO NOTE 5,

THIS SHT.

C-5-4

EXISTING TREELINE

EXISTING TOPOGRAPHY

EXISTING ASPHALT

EXISTING GRAVEL ROAD

EXISTING BUILDING

EXISTING STORM DRAIN

EXISTING RECLAIMED WATER

LEGEND

EXISTING POTABLE WATER

EXISTING SEWER

EXISTING TELECOMM

EXISTING COMMUNICATION LINE

EXISTING UNDERGROUND POWER

EXISTING UTILITY TO BE ABANDONED

IN PLACE OR REMOVED

EXISTING PAVEMENT TO BE REMOVED

EXISTING SLOPES, 15-25%

EXISTING SLOPES, > 25%

EXISTING PAVEMENT TO BE REMOVED

& REPLACED

REMOVE AND STORE EX. WHEEL

STOPS (TYP. 9) DURING

CONSTRUCTION. REPLACE UPON

COMPLETION OF TRENCHING

AND PAVEMENT RESTORATION.

EX. LIGHT POLE TR

TBRL (SEE

SITE PLAN)

RIPRAP TO BE REMOVED

FOR POND FOREBAY.

RIPRAP TO REMAIN. ADJUST

RIPRAP TO MATCH

PROPOSED GRADES ON

SHEETS C-1-3 & C-1-5.

FUTURE

COTTAGE #2

R

R

R

F U

T U

R

E

C

O

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A

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

R

R

R

R

167°

167°

R

T

CONC.

EXISTING BUILDING (TRAILER)

F.F.=53.91'

B.F.=43.42'

OVERHANG

GATE

EX. HC SIGNS

GATE

C

O

N

W

W A

L L

EXISTING

SHED

EX.

BLDG

F.F.=53.92'

EXISTING BUILDING

OVERHANG

EXISTING BUILDING

F.F.=52.66'

I N

V E

R

T

SIGN

SECURITY

D

I

T

C

H

SIGN

RESEARCH

PARKING

CONC.

WALL

RIP RAP

AC

EX. WOODLAND PARKING

E

B

A

N

D

E

E

E

0+00

0+50

L

L2

L

L

C

C

20'

P

LINE TABLE

NUMBER

L1

L2

L3

L4

BEARING

N04°37'19"W

N82°53'24"E

N62°47'36"E

N77°27'44"E

LENGTH (FT)

95.74

49.02

24.72

109.12

START POINT

N445,351.51, E1,439,631.50

N445,438.97, E1,439,566.41

N445,450.18, E1,439,631.73

N445,465.83, E1,439,665.72

END POINT

N445,446.93, E1,439,623.78

N445,445.04, E1,439,615.06

N445,461.49, E1,439,653.72

N445,489.52, E1,439,772.24

CURVE TABLE

NUMBER

C1

C2

RADIUS (FT)

LENGTH (FT)

17.54

12.80

TANGENT (FT)

8.86

6.44

DELTA

020°05'48"

014°40'08"

CHORD

LENGTH (FT)

17.45

12.77

CHORD BEARING

N72°50'30"E

N70°07'40"E

EXISTING TREELINE

EXISTING TOPOGRAPHY

EXISTING ASPHALT

EXISTING GRAVEL ROAD

EXISTING BUILDING

EXISTING STORM DRAIN

EXISTING RECLAIMED WATER

LEGEND

EXISTING POTABLE WATER

EXISTING SEWER

EXISTING CLEAN OUT

EXISTING SIGN

EXISTING ELECTRIC HAND HOLE

EXISTING POWER POLE

EXISTING LIGHT POLE

EXISTING TREE

EXISTING TELECOMM

EXISTING COMMUNICATION LINE

EXISTING UNDERGROUND POWER

PROPOSED LIMIT OF

DISTURBANCE

FUTURE RETAINING WALL

PROPOSED SIDEWALK

FUTURE RAILING

FUTURE BUILDING

PROPOSED DRIVE

PROPOSED TREELINE

FUTURE SIDEWALK

2 PARKING SPACE COUNT

C-5-4

DETAIL NUMBER

SHEET NUMBER

(SCHMIDT CENTER)

(DORMITORY)

PROPOSED DRIVEWAY

FULL DEPTH ASPHALT PAVEMENT

CONCRETE LEAD

WALK, LANDING,

STEPS

FUTURE RAMP

& HANDRAIL

PATIO

RET. WALL

HT. = 3' ±

TREE

PIT

E X

. W O

O D

L A

N D

P A

R K

IN

G

T O

J A

V A

F A

R M

R O

A D

EX. UTILITY YARD

PROPOSED WALKWAY

FULL DEPTH ASPHALT

PAVEMENT

RET. WALL

HT. = 5' ±

RET. WALL

HT. = 3' ±

NOTE: THIS PLAN IS FOR SITE IMPROVEMENTS ONLY

SITE PLAN NOTES:

1. HANDICAP PARKING SYMBOLS SHALL BE WHITE WITH BLUE BACKGROUND.

2. THESE PLANS WERE PREPARED WITH THE BENEFIT OF A SITE SPECIFIC

GEOTECHNICAL REPORT BUT WITHOUT CERTAIN DESIGN ELEMENT

RECOMMENDATIONS INCLUDING ASPHALT AND CONCRETE PAVING SECTIONS.

THESE DESIGN ELEMENTS ARE SUBJECT TO CHANGE.

PATIO

TREE

PIT

P

A

T

I

O

T

R

E

E

P

I

T

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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C-5-4

PROPOSED LIGHT POLES (2) PROVIDED

BY SERC (REMOVE EX. AND REPLACE

WITH SERC STANDARD)

C-5-4

PROPOSED LIGHT POLE

(CONTRACTOR TO

PROCURE)

C-5-4

PROPOSED LIGHT

POLE (CONTRACTOR

TO PROCURE)

PROPOSED LIGHT

POLE (CONTRACTOR

TO PROCURE)

C-5-4

CONNECT TO EX S/W

AT GRADE (SEE

NOTE 1 THS SHT)

E X

G

R A

V E

L

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O A

D

E X

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N S

P A

C E

13 2

SERC DRIVE

P R

O P

P A

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IN

G

C-5-4

EX. LIGHT POLE TO

BE RELOCATED AS

SHOWN

PROP. FIRE LANE SIGN

PROP. FIRE

LANE SIGN

C-5-4

PROP. FIRE

LANE SIGN

C-5-4

RELOCATED

HC SIGN

PROP. VAN

ACCESSIBLE

HC SIGN

PROP. HC SIGNS,

1 RELOCATED,

1 NEW

PARKING SUMMARY:

WOODLAND PARKING

SPACES PROVIDED: 86

ADA REQUIRED: 4

ADA VAN REQUIRED: 1

ADA PROVIDED: 4

ADA VAN PROVIDED: 1

F

IR

E L

A N

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- N

O P

A R

K

IN

G

PROPOSED

DRIVEWAY

FULL DEPTH

ASPHALT

PAVEMENT

PROP. 6" YELLOW

FIRE LANE STRIPING

WITH 'NO PARKING'

STENCIL

PROP. 6" YELLOW

FIRE LANE

STRIPING WITH 'NO

PARKING' STENCIL

F

IR

E L

A N

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N O

P A

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IN

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F I R

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L A

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P

A R

K I N

G

F I R

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L A

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P

A R

K I N

G

C-5-4

C-5-4

C-5-4

TRV # 501

ELEV = 72.79'

E

T

CONC.

EXISTING BUILDING (TRAILER)

F.F.=53.91'

B.F.=43.42'

OVERHANG

CONC.

12" TREE

18" TREE

20" TREE

18" TREE

18" TREE

24" OAK

12" TREE

TWIN

40" TREE

E D

G E

O F

P A

V E

M

E N

T

GATE

EX. HC SIGNS

GATE

CONC. PORCH

C

O

N

W

W A

L L

EXISTING

SHED

EX.

BLDG

F.F.=53.92'

EXISTING BUILDING

OVERHANG

EXISTING BUILDING

F.F.=52.66'

18" TREE

12" TREE

TWIN

12" TREE

18" TREE

15" TREE

24" TREE

18" TREE

20" TREE

12" TREE

18" TREE

20" TREE

TWIN

18" TREE

18" TREE

I N

V E

R

T

SIGN

SECURITY

D

I

T

C

H

SIGN

RESEARCH

PARKING

E D

U

N P

A V

CONC.

E D

P

A V

E M

E N

T

WALL

P

E

D

P

A

V

E D

U

N P

A V

TRENCH DRAIN

INV EL=50.68'

TOP EL=52.18'

TOP EL=43.37'

E

D

6" PVC

6" PVC

P V

C

8" PVC

15" TREE

EX. WOODLAND PARKING

E

E

B

A

N

D

E

E

C

E

FUTURE

COTTAGE #2

F U

T U

R

E

C

O

T T

A

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

ES

MH

MH

I

I

I

I

I

ES

I

ROOF

DRAIN

S

S

I

P

E

H

D

P

E

P

E

H

D P

E

H

D

P

E

H

D P

E

H

D P

E

P

E

H

D P

E

ROOF

DRAIN

(TD

-2)

T R

E N

C H

D R

A

IN

(T D

-1

P

E

TR

EN

C H

D R

AIN

T R

E N

C H

D R

A

IN

T

D -3

0 55

FUTURE RETAINING WALL

FUTURE RAILING

FUTURE BUILDING

PROPOSED DRIVE

EXISTING TREELINE

EXISTING TOPOGRAPHY

EXISTING ASPHALT

EXISTING GRAVEL ROAD

EXISTING BUILDING

EXISTING STORM DRAIN

EXISTING RECLAIMED WATER

LEGEND

EXISTING POTABLE WATER

EXISTING SEWER

EXISTING CLEAN OUT

EXISTING SIGN

EXISTING ELECTRIC HAND HOLE

EXISTING POWER POLE

EXISTING LIGHT POLE

EXISTING TREE

EXISTING TELECOMM

EXISTING COMMUNICATION LINE

EXISTING UNDERGROUND POWER

PROPOSED SIDEWALK

PROPOSED TOPOGRAPHY

PROPOSED LIMIT OF

DISTURBANCE

PROPOSED SPOT ELEVATION

PROPOSED STORM DRAIN

PROPOSED TREELINE

FUTURE SIDEWALK

NOTE: THIS PLAN IS FOR INTERIM GRADING ONLY

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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NOTE: GRADING IS SUBJECT TO CHANGE THROUGHOUT FINAL

ENGINEERING DESIGN.

CONNECT TO EX.

S/W AT GRADE

CONNECT TO EX.

S/W AT GRADE

CONNECT TO EX.

S/W AT GRADE

EXISTING ENHANCED EXTENDED

DETENTION POND

TREE PIT FOR

PROPOSED FILTERRA

UNIT OR SIMILAR SWM

FEATURE (TYP. 3)

GRADING NOTES:

1. CLASS II FILL TO BE PLACED BELOW ALL PAVED AREAS INCLUDING PARKING LOTS, DRIVES AND

SIDEWALKS.

2. CLASS III TO BE PLACED IN AREAS TO REMAIN "GREEN."

3. MAXIMUM SLOPE IN GRASSED AREAS IS 3:1, MINIMUM SLOPE IS 2.5%, UNLESS OTHERWISE NOTED ON

THE PLANS.

4. MAXIMUM PAVEMENT SLOPE IS 12.5%, MINIMUM SLOPE IS 1.0%, UNLESS OTHERWISE NOTED ON THE

PLANS.

5. MAXIMUM SLOPE IN PARKING AREAS IS 7%, MINIMUM SLOPE IS 1%.

6. SLOPE IN HANDICAP PARKING AREAS SHALL BE NO MORE THAN 2% IN ALL DIRECTIONS.

7. CONTRACTOR SHALL COORDINATE WITH COTR TO MAINTAIN ACCESS TO SERC WATER TOWER AND

SEWER DRAIN FIELDS.

X

M

A

X

CONNECT TO EX.

ASPH. DRIVE AT

GRADE

E X

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E P

P O

O L S

Y S

T E

M

D O

N O

T D

IS

T

U R

B

BEST MANAGEMENT PRACTICES FOR WORKING IN NONTIDAL WETLANDS, WETLAND BUFFERS,

WATERWAYS, AND 100-YEAR FLOODPLAINS

(APPLIES TO EAST SIDE OF LOD, IN AND IMMEDIATELY ADJACENT TO EXISTING WETLAND BUFFER)

1) NO EXCESS FILL, CONSTRUCTION MATERIAL, OR DEBRIS SHALL BE STOCKPILED OR STORED IN

NONTIDAL WETLANDS, NONTIDAL WETLAND BUFFERS, WATERWAYS, OR THE 100-YEAR

FLOODPLAIN.

2) PLACE MATERIALS IN A LOCATION AND MANNER WHICH DOES NOT ADVERSELY IMPACT SURFACE

OR SUBSURFACE WATER FLOW INTO OR OUT OF NONTIDAL WETLANDS, NONTIDAL WETLAND

BUFFERS, WATERWAYS, OR THE 100-YEAR FLOODPLAIN.

3) DO NOT USE THE EXCAVATED MATERIAL AS BACKFILL IF IT CONTAINS WASTE METAL PRODUCTS, UNSIGHTLY DEBRIS, TOXIC MATERIAL, OR ANY OTHER DELETERIOUS SUBSTANCE. IF ADDITIONAL

BACKFILL IS REQUIRED, USE CLEAN MATERIAL FREE OF WASTE METAL PRODUCTS, UNSIGHTLY

DEBRIS, TOXIC MATERIAL, OR ANY OTHER DELETERIOUS SUBSTANCE

4) PLACE HEAVY EQUIPMENT ON MATS OR SUITABLY OPERATE THE EQUIPMENT TO PREVENT

DAMAGE TO NONTIDAL WETLANDS, NONTIDAL WETLAND BUFFERS, WATERWAYS, OR THE

100-YEAR FLOODPLAIN.

5) REPAIR AND MAINTAIN ANY SERVICEABLE STRUCTURE OR FILL SO THERE IS NO PERMANENT

LOSS OF NONTIDAL WETLANDS, NONTIDAL WETLAND BUFFERS, OR WATERWAYS, OR

PERMANENT MODIFICATION OF THE 100-YEAR FLOODPLAIN IN EXCESS OF THAT LOST UNDER

THE ORIGINALLY AUTHORIZED STRUCTURE OR FILL.

6) RECTIFY ANY NONTIDAL WETLANDS, NONTIDAL WETLAND BUFFERS, WATERWAYS, OR 100-YEAR

FLOODPLAIN TEMPORARILY IMPACTED BY ANY CONSTRUCTION.

7) ALL STABILIZATION IN THE NONTIDAL WETLAND AND NONTIDAL WETLAND BUFFER SHALL

CONSIST OF THE FOLLOWING SPECIES: ANNUAL RYEGRASS (LOLIUM MULTIFLORUM), MILLET

(SETARIA ITALICA), BARLEY (HORDEUM SP.), OATS (UNIOLA SP.), AND/OR RYE (SECALE CEREALE).

THESE SPECIES WILL ALLOW FOR THE STABILIZATION OF THE SITE WHILE ALSO ALLOWING FOR

THE VOLUNTARY REVEGETATION OF NATURAL WETLAND SPECIES. OTHER NON-PERSISTENT

VEGETATION MAY BE ACCEPTABLE, BUT MUST BE APPROVED BY THE NONTIDAL WETLANDS AND

WATERWAYS DIVISION. KENTUCKY 31 FESCUE SHALL NOT BE UTILIZED IN WETLAND OR BUFFER

AREAS. THE AREA SHOULD BE SEEDED AND MULCHED TO REDUCE EROSION AFTER

CONSTRUCTION ACTIVITIES HAVE BEEN COMPLETED.

8) AFTER INSTALLATION HAS BEEN COMPLETED, MAKE POST-CONSTRUCTION GRADES AND

ELEVATIONS THE SAME AS THE ORIGINAL GRADES AND ELEVATIONS IN TEMPORARILY IMPACTED

AREAS.

9) TO PROTECT AQUATIC SPECIES, IN-STREAM WORK IS PROHIBITED AS DETERMINED BY THE

CLASSIFICATION OF THE STREAM:

USE I WATERS: IN-STREAM WORK SHALL NOT BE CONDUCTED DURING THE PERIOD MARCH 1

THROUGH JUNE 15, INCLUSIVE, DURING ANY YEAR.

USE III WATERS: IN-STREAM WORK SHALL NOT BE CONDUCTED DURING THE PERIOD

OCTOBER 1 THROUGH APRIL 30, INCLUSIVE, DURING ANY YEAR.

USE IV WATERS: IN-STREAM WORK SHALL NOT BE CONDUCTED DURING THE PERIOD MARCH

1 THROUGH MAY 31, INCLUSIVE, DURING ANY YEAR.

10) STORMWATER RUNOFF FROM IMPERVIOUS SURFACES SHALL BE CONTROLLED TO PREVENT THE

WASHING OF DEBRIS INTO THE WATERWAY.

11) CULVERTS SHALL BE CONSTRUCTED AND ANY RIPRAP PLACED SO AS NOT TO OBSTRUCT THE

MOVEMENT OF AQUATIC SPECIES, UNLESS THE PURPOSE OF THE ACTIVITY IS TO IMPOUND

WATER.

V

E L E

TRV # 500

ELEV = 53.08'

TRV # 501

ELEV = 72.79'

TRV # 103

ELEV = 39.03'

EX. SMH 2A

INVERT

8" PVC (E) = 39.22'

8" PVC (W) = 39.18'

8" PVC (S) = 39.14'

EX. SMH-3

INVERT

8" PVC (W) = 40.59'

8" PVC (NE) = 40.73'

8" PVC (S) = 40.28'

E

W

M

W

M

T

CONC.

EXISTING BUILDING (TRAILER)

F.F.=53.91'

B.F.=43.42'

OVERHANG

CONC.

EMH TOP

EL=54.31'

12" TREE

18" TREE

20" TREE

18" TREE

18" TREE

24" OAK

12" TREE

TWIN

40" TREE

E D

G E

O F

P A

V E

M

E N

T

GATE

EX. HC SIGNS

E

X

R

W

E

X

S

GATE

E

X

S

CONC. PORCH

E X

W

E

X

O

N

W

W A

L L

EXISTING

SHED

EX.

BLDG

F.F.=53.92'

EXISTING BUILDING

OVERHANG

EXISTING BUILDING

F.F.=52.66'

12" TREE

TWIN

12" TREE

18" TREE

15" TREE

24" TREE

12" TREE

18" TREE

20" TREE

TWIN

18" TREE

LIGHT

POLE

SIGN

SECURITY

D

I

T

C

H

SIGN

RESEARCH

PARKING

LIGHT

POLE

TRV # 102

ELEV = 48.63'

E X

W

E

X

R

W

E

E X

R

W

M

LIGHT POLE

LIGHT POLE

E D

U

N P

A V

CONC.

E D

P

A V

E M

E N

T

E

W

M

W

M

W

WALL

P

E

D

P

A

V

E D

U

N P

A V

T

TRENCH DRAIN

INV EL=50.68'

TOP EL=52.18'

TMH TOP

EL=47.19'

TOP EL=43.37'

E

D

6" PVC

6" PVC

P V

C

8" PVC

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EX. WOODLAND PARKING

E

B

A

N

D

E

E

C

EX. SMH 2

INVERT

8" PVC (E) = 38.65'

E

FUTURE

COTTAGE #2

F U

T U

R

E

C

O

T T

A

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

ES

MH

MH

I

I

I

I

I

ES

I

ROOF

DRAIN

S

S

I

P

E

H

D

P

E

P

E

H

D P

E

H

D

P

E

H

D P

E

H

D P

E

P

E

H

D P

E

ROOF

DRAIN

(TD

-2)

T R

E N

C H

D R

A

IN

(T D

-1

P

E

TR

EN

C H

D R

AIN

T R

E N

C H

D R

A

IN

T

D -3

EXISTING TREELINE

EXISTING TOPOGRAPHY

EXISTING ASPHALT

EXISTING GRAVEL ROAD

EXISTING BUILDING

EXISTING STORM DRAIN

EXISTING RECLAIMED WATER

LEGEND

EXISTING POTABLE WATER

EXISTING SEWER

EXISTING CLEAN OUT

EXISTING SIGN

EXISTING ELECTRIC HAND HOLE

EXISTING POWER POLE

EXISTING LIGHT POLE

EXISTING TREE

EXISTING TELECOMM

EXISTING COMMUNICATION LINE

EXISTING UNDERGROUND POWER

PROPOSED DRIVE

PROPOSED STORM DRAIN

PROPOSED UNDERGROUND ELEC

PROPOSED COMMUNICATIONS,

FIBER, SECURITY LINES

PROPOSED SEWER CONNECTION WITH CLEANOUT

PROPOSED WATER CONNECTION

PROPOSED RECLAIMED WATER

PROPOSED DRY PIPE FOR FDC

PROPOSED FIRE HYDRANT

FUTURE RETAINING WALL

FUTURE RAILING

FUTURE BUILDING

FUTURE SIDEWALK

PROPOSED DOMESTIC WATER

PROPOSED SANITARY SEWER

NOTES

1. PLAN REPRESENTS INFRASTRUCTURE PHASE ONLY, ALL BUILDINGS SHOWN ARE FUTURE, FOR

INFORMATION ONLY.

2. COTTAGES 1, 3 AND 5 ARE MIRRORED.

3. UTILITY SERVICES TO SCHMIDT BUILDING AND DORMITORY SHALL BE MAINTAINED. COORDINATE

ANY OUTAGES WITH COTR.

4. COMMUNICATIONS SERVICE CONNECTIONS FOR COTTAGE 2, 4 AND 6 ARE INTERNAL TO THE

BUILDINGS- REFER TO ELECTRICAL DRAWINGS.

5. DOMESTIC WATER HOUSE CONNECTIONS SHALL BE 1" COPPER.

6. SANITARY SEWER HOUSE CONNECTIONS SHALL BE 4" PVC WITH CLEANOUT.

7. FDC SERVICE CONNECTIONS SHALL BE 4" DIP.

8. RW (FIRE PROTECTION) SERVICE CONNECTIONS SHALL BE 4" DIP.

9. REFER TO INTERIM GRADING AND DRAINAGE PLAN FOR STORM DRAIN INFORMATION (SHEET C-1-3).

10. CONTRACTOR SHALL PROVIDE GPS COORDINATES FOR ALL UTILITIES CAPPED BELOW GRADE.

11. ALL FIRE HYDRANTS WILL BE SET WITH STREAM OUTLET OF FIRE HYDRANT FACING THE EDGE OF

THE PAVEMENT

12. ALL BENDS AND FITTINGS ON POTABLE WATER (W) AND RECLAIMED WATER (RW) TO BE RESTRAINED

OR BLOCKED.

13. MINIMUM COVER OVER RECLAIMED WATER, FDC AND POTABLE WATER SHALL BE 4 FT. SEE STORM

DRAIN PROFILES ON SHEET C-2-1 FOR CROSSING ELEVATIONS.

NOTE: THIS PLAN IS FOR UTILITY CONSTRUCTION ONLY

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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T

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ABBREVIATIONS

BGE - BALTIMORE GAS & ELECTRIC

DIP - DUCTILE IRON PIPE

EMH - ELECTRIC MANHOLE

EX. - EXISTING

FDC - FIRE DEPARTMENT CONNECTION

FH - FIRE HYDRANT

PROP. - PROPOSED

PVC - POLYVINYL CHLORIDE PIPE

RW - RECLAIMED WATER

SHC - SEWER HOUSE CONNECTION

SMH - SEWER MANHOLE

TYP. - TYPICAL

WHC - WATER HOUSE CONNECTION

E X

. W

O O

D L A

N D

P A

R K

IN

G

J

A

D

EX. UTILITY YARD

2x6" PVC CONDUIT

COORDINATE WITH BGE

PROP. 6" DIP DRY FDC

PIPING

PROP. FDC

PROP. 4.5' FH

8" X 6" TEE & 6" VALVE.

SEE NOTE 11

ELEC. CONDUITS: 1

TO EACH COTTAGE

AND 2 SPARE. SEE

ELEC. PLANS

PROP. 4.5' FH,

8" X 6" TEE &

6" VALVE.

SEE NOTE 11

PROP. 1" PVC ELEC.

PROP. ELEC. SEE ELEC. PLANS

PROP. LIGHT

POLE, TYP. 3

PROP. 4"

DOMESTIC

WATER

PROP. 4" CAP (SEE NOTE 10)

SMH

PROP. 4" FDC

CONNECTION (TYP. 7)

PROP. 4" SPRINKLER LINE (TYP. 7)

PROP. 4" SHC (TYP. 7)

PROP. 1" WHC. (TYP. 7)

PROP. FDC

PROP. ELEC.

HANDHOLE

(TYP. 5)

PROP. ELEC. HANDHOLE

PROP. EMH

COORD.

WITH BGE.

PROP. STORM

MANHOLE (TYP. 3)

(SCHMIDT CENTER)

(DORMITORY)

PROP. 8"

DIP RW

APPROX. LOCATION

OF EX. TELECOM

PEDESTAL

CONTRACTOR SHALL FIELD

VERIFY LOCATION OF EX. FH

TEE PRIOR TO CONSTRUCTION.

INSTALL PROP. 8"X8" TEE AT

LEAST 5FT FROM EXISTING

FITTINGS

PROP. 4"

DOMESTIC

WATER

CONTRACTOR

MAY ADJUST EX.

UGE AS NEEDED

CONDUIT TO EACH LIGHT,

SEE ELECTRICAL PLANS

PVC CONDUITS. SEE

ELEC. PLANS.

CAP BELOW GRADE

FOR FUTURE LODGE

CONNECTION

PROP. 8" CAP (SEE NOTE 10)

SERC DRIVE

PROP. 6" CAP, TYP. 2 (SEE NOTE 10)

CAP PROP. 6" DIP

BELOW GRADE.

SEE NOTE 10

CAP BELOW GRADE

(TYP. ALL COMM HOUSE

CONNECTIONS) SEE NOTE 10

CAP BELOW GRADE

(TYP. ALL ELEC. HOUSE

CONNECTIONS)

SEE NOTE 10

CAP BELOW GRADE

(TYP. ALL DW, RW & FDC

HOUSE CONNECTIONS)

SEE NOTE 10

TEMPORARY ELEC.

CONNECTION TO

TRAILER. SEE ELEC.

PLANS.

EX. LIGHT POLE TO

BE RELOCATED AS

SHOWN

SMH

SCO

SCO

SCO

SCO

SCO

S

CONNECT PROP.

4" W TO EX. 4" W

CONNECT PROP. 8" DIP RW

TO EX. 8" DIP RW

SCO

CONNECT PROP. 8" RW

TO EX. 8" RW WITH 8"X8"

TAPPING SLEEVE & VALVE

PROP. 8" CAP

8"

HB

8"

HB

8"

HB

8"

HB

8"

HB

6"

HB

6"

HB

6"

HB

8"

HB

4"

HB

4"

HB

8"

HB

(2) 4"

HB

8"

HB

ROCK OUTLET PROTECTION II:

CLASS I RIPRAP

W = 15 FT

L a

= 13 FT

T = 19 IN

H = 12 IN

D

= 9.5 IN

ROCK OUTLET PROTECTION I:

CLASS I RIPRAP

W = 11.5 FT

L a

= 10 FT

T = 19 IN

H = 9 IN

D

= 9.5 IN.

8"

HB

STUB OUT 2" PVC AND CAP

BELOW GRADE FOR FUTURE

LODGE FORCE MAIN CONNECTION

CAP DOMESTIC AND

RECLAIMED WATER

BELOW GRADE FOR

FUTURE LODGE

CONNECTION

CONTRACTOR SHALL BE

RESPONSIBLE FOR INSTALLATION OF

3" ORIFICE STEEL PLATE IN EX. SWM

POND RISER STRUCTURE. SEE SHEET

C-5-4 FOR ADDITIONAL INFORMATION

C-5-4

C-5-4

C-5-4

E

L

TRV # 500

ELEV = 53.08'

TRV # 501

ELEV = 72.79'

TRV # 103

ELEV = 39.03'

E

W

M

W

M

T

CONC.

EXISTING BUILDING (TRAILER)

F.F.=53.91'

B.F.=43.42'

OVERHANG

CONC.

12" TREE

18" TREE

20" TREE

18" TREE

18" TREE

24" OAK

12" TREE

TWIN

40" TREE

GATE

EX. HC SIGNS

GATE

CONC. PORCH

C

O

N

W

W A

L L

EXISTING

SHED

EX.

BLDG

F.F.=53.92'

EXISTING BUILDING

OVERHANG

EXISTING BUILDING

F.F.=52.66'

18" TREE

12" TREE

TWIN

12" TREE

18" TREE

15" TREE

24" TREE

18" TREE

20" TREE

12" TREE

18" TREE

20" TREE

TWIN

18" TREE

18" TREE

I N

V E

R

T

SIGN

SECURITY

D

I

T

C

H

SIGN

RESEARCH

PARKING

TRV # 102

ELEV = 48.63'

E

X

R

W

E

E X

R

W

M

CONC.

E

W

M

W

M

W

M

WALL

T

RIP RAP

AC

15" TREE

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EX. WOODLAND PARKING

E

B

A

N

D

E

E

C

E

FUTURE

COTTAGE #2

F U

T U

R

E

C

O

T T

A

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

F

U

T

U

R

E

C

O

T

T

A

F U

T U

R E

C O

T T

A G

E

ES

MH

MH

I

I

I

I

I

ES

I

ROOF

DRAIN

S

S

I

P

E

H

D

P

E

P

E

H

D P

E

H

D

P

E

H

D P

E

H

D P

E

P

E

H

D P

E

ROOF

DRAIN

(TD

-2)

T R

E N

C H

D R

A

IN

(T D

-1

P

E

TR

EN

C H

D R

AIN

T R

E N

C H

D R

A

IN

T

D -3

P S

D

- 1

S C

E

STAGING/STORAGE

0 55

TGOS

EXISTING TREELINE

EXISTING TOPOGRAPHY

EXISTING ASPHALT

EXISTING GRAVEL ROAD

EXISTING BUILDING

EXISTING STORM DRAIN

EXISTING RECLAIMED WATER

LEGEND

EXISTING POTABLE WATER

EXISTING SEWER

EXISTING CLEAN OUT

EXISTING SIGN

EXISTING ELECTRIC HAND HOLE

EXISTING POWER POLE

EXISTING LIGHT POLE

EXISTING TREE

EXISTING TELECOMM

EXISTING COMMUNICATION LINE

EXISTING UNDERGROUND POWER

PROPOSED DRIVE

PROPOSED TOPOGRAPHY

PROPOSED LIMIT OF

DISTURBANCE

PROPOSED SPOT ELEVATION

PROPOSED STORM DRAIN

PROPOSED TREELINE

PSD

EARTH DIKE

SILT FENCE

PIPE SLOPE DRAIN

SUPER SILT FENCE

STABILIZED CONSTRUCTION ENTRANCESCE

TEMPORARY GABION OUTLET STRUCTURE

FUTURE RETAINING WALL

PROPOSED SIDEWALK

FUTURE RAILING

FUTURE BUILDING

FUTURE SIDEWALK

SEQUENCE OF CONSTRUCTION

1. CONTRACTOR SHALL ARRANGE A PRE-CONSTRUCTION MEETING WITH MDE A MINIMUM OF 5 DAYS PRIOR TO THE

BEGINNING OF CONSTRUCTION ACTIVITIES.

2. CLEAR AND GRUB AS NECESSARY TO INSTALL PERIMETER SEDIMENT CONTROLS. INSTALL PERIMETER

CONTROLS PRIOR TO ANY DEMOLITION.

NOTE: ALL FOREST AND WETLAND OUTSIDE THE LIMITS OF DISTURBANCE SHALL BE MARKED IN THE FIELD PRIOR

TO ANY LAND DISTURBING ACTIVITY.

3. REMOVE EXISTING BUILDINGS AND UTILITIES. SEE EXISTING CONDITIONS AND DEMOLITION PLAN C-1-1, SHEET 2.

CLEAR AND GRUB AS NECESSARY WITHIN INSTALLED PERIMETER CONTROLS.

4. INSTALL ALL 100 SERIES STORM DRAINS. DURING A NOAA THREE (3) DAY DRY FORECAST, REMOVE EX. RIPRAP

AT ES-101 AND GRADE THE FOREBAY AREA. STABILIZE WITH GEOTEXTILE MATTING IMMEDIATELY AFTER

GRADING. FOR INSTALLATION OF STORM DRAINS, SAME DAY STABILIZATION IS REQUIRED. INSTALL INLET

PROTECTION ON CONSTRUCTED INLETS. SEE UTILITY CONSTRUCTION NOTE 22 ON SHEET 9 (C-5-2).

5. INSTALL ALL OTHER SEDIMENT CONTROLS INCLUDING STABILIZED CONSTRUCTION ENTRANCE, EARTH DIKES, TEMPORARY SWALE, TEMPORARY GABION OUTLET STRUCTURE, AND PIPE SLOPE DRAIN AS SHOWN ON PLANS.

6. INSTALL ALL 200 SERIES STORM DRAINS. INSTALL INLET PROTECTION ON THE CONSTRUCTED INLETS.

7. GRADE THE SITE. STABILIZE ALL DISTURBED AREAS. LIMITS OF DISTURBANCE TO BE STRICTLY MAINTAINED TO

ENSURE PROTECTION OF NATURAL AREAS. CONSTRUCTION EQUIPMENT AND VEHICLES MUST REMAIN INSIDE

THE APPROVED LIMITS OF DISTURBANCE. SEE STABILIZATION NOTE ON THIS SHEET FOR STABILIZATION

TIMEFRAME.

8. GRADE PROPOSED ROAD. DURING GRADING, THE SIZE OF THE TEMPORARY GABION OUTLET STRUCTURE CAN

BE REDUCED AS NEEDED. ONCE ROAD AND BERMS ARE GRADED TO DIRECT WATER TO PROPOSED INLETS, TGOS AND PIPE SLOPE DRAIN CAN BE REMOVED WITH APPROVAL OF THE INSPECTOR. SEE SHEET C-1-5A FOR

PROPOSED GRADING AFTER TGOS REMOVAL. INSTALL SUPER SILT FENCE AS SHOWN ON SHEET C-1-5A.

9. INSTALL TRENCH DRAINS AND TEMPORARILY BLOCK THE OUTFLOW UNTIL THE BASE COURSE OF PAVEMENT HAS

BEEN LAID.

10. INSTALL ALL OTHER UTILITIES.

NOTE: ANY SEDIMENT CONTROL DEVICE LOCATED OVER PROPOSED WATER, SEWER, OR STORM DRAINS MAY BE

DISTURBED TEMPORARILY TO ALLOW FOR CONSTRUCTION OF THE LINES. THE DISTURBED SECTION OF SEDIMENT

CONTROL SHOULD BE REPLACED THE SAME DAY. SUCH WORK SHOULD BE DONE ON A DRY DAY ONLY.

11. CONSTRUCT PROPOSED PAVEMENT TO THE BASE COURSE.

12. CONSTRUCT TOP COURSE OF PAVEMENT ON EXISTING AND PROPOSED PAVEMENT AREAS.

13. WITH THE APPROVAL OF THE INSPECTOR, REMOVE ALL SEDIMENT CONTROL MEASURES AND INSTALL

PERMANENT STABILIZATION TO ALL DISTURBED AREAS. UNBLOCK TRENCH DRAIN OUTFALLS.

NOTE: CONTRACTOR SHALL MAINTAIN ACCESS AT THE LOCATIONS NOTED ON THE PLAN.

NOTE: REFER TO SHEETS C-5-1 THROUGH C-5-3 (SHEETS 9-11) FOR EROSION AND SEDIMENT CONTROL STANDARD

DETAILS AND SPECIFICATIONS.

MAINTAIN CLEAR

PATH FOR INGRESS

AND EGRESS

MAINTAIN CLEAR

PATH FOR INGRESS

AND EGRESS

MAINTAIN 10' MIN.

CLEAR PATH FOR

INGRESS AND EGRESS

MAINTAIN CLEAR

PATH FOR INGRESS

AND EGRESS

MAINTAIN CLEAR

PATH FOR INGRESS

AND EGRESS

STABILIZATION NOTE

FOLLOWING INITIAL SOIL DISTURBANCE OR RE-DISTURBANCE,

PERMANENT OR TEMPORARY STABILIZATION MUST BE

COMPLETED WTIHIN:

A. THREE (3) CALENDAR DAYS AS TO THE SURFACE OF ALL

PERIMETER DIKES, SWALES, DITCHES, PERIMETER SLOPES,

AND ALL SLOPES STEEPER THAN 3 HORIZONTAL TO 1

VERTICAL (3:1); AND

B. SEVEN (7) CALENDAR DAYS AS TO ALL OTHER DISTURBED

OR GRADED AREAS ON THE PROJECT SITE NOT UNDER

ACTIVE GRADING.

NOTE: THIS PLAN IS FOR EROSION AND SEDIMENT CONTROLS ONLY

EXISTING MATURE

VEGETATION COVER

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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TGOS #1

DA = 0.77 AC

VOLUME REQUIRED:

0.77 AC * 1,800 CF/AC = 1,386 CF

VOLUME PROVIDED: 1,408 CF

WEIR CREST ELEV. = 49.25'

ED #2

TYPE: A-2

DA = 0.16 AC

SLOPE: 8.2%

ED #1

TYPE: A-1

DA = 0.61 AC

SLOPE: 1.9%

SIP-A

DA = 0.08 AC

SIP-A

DA = 0.03 AC

SIP-A

DA = 0.03 AC

SIP-A

DA = 0.08 AC

SIP-A

DA = 0.02 AC

SIP-A

DA = 0.02 AC

AGIP

DA = 0.40 AC

SUPER SILT FENCE:

PLACE ON LOD (FENCE OFFSET FOR

GRAPHIC PURPOSES)

CONSTRUCTION OF ALL

UTILITIES OUTSIDE OF

DESIGNED CONTROLS

PER NOTE 22 OF

STANDARD EROSION &

SEDIMENT CONTROL

NOTES ON C-5-2 (SHEET 9)

MAINTAIN POSITIVE

DRAINAGE ALONG

EARTH DIKE

STRUCTURE S-108 &

TRENCH DRAIN

(TYP. 3) TO REMAIN

BLOCKED UNTIL

UPSTREAM AREA IS

STABILIZED)

SIP-B

DA = 0.56 AC

ROP I

CLASS I

W = 11.5 FT

La = 10 FT

T = 19 IN

H = 9 IN

ROP II

CLASS I

W = 15 FT

La = 13 FT

T = 19 IN

H = 12 IN

(CONTRACTOR MAY USE OR

MODIFY EX. RIPRAP TO MEET

REQUIREMENTS ABOVE)

ALL 3:1 SLOPES SHALL

BE STABILIZED WITH

MATTING IMMEDIATELY

AFTER GRADING (TYP.)

NORTH

SD OUTFALL

Q10 = 1.25 CFS

V10 = 0.71 FPS

(MAX.Q & V OCCUR IN

INTERIM CONDITION)

SD OUTFALL

Q10 = 5.32 CFS

V10 = 1.69 FPS

(MAX. Q & V OCCUR IN

FINAL CONDITION)

FOREBAY TO BE GRADED DURING A NOAA

THREE (3) DAY DRY FORECAST AND

STABILIZED WITH GEOTEXTILE MATTING

IMMEDIATELY AFTER GRADING. SEE

SEQUENCE ITEM 4, THIS SHEET.

SEE DETAIL ON C-5-2 FOR SUPER SILT

FENCE ADJUSTMENTS DURING FOREBAY

AND PIPE OUTFALL CONSTRUCTION

USE EX. RIPRAP TO LINE CHANNEL FROM

FOREBAY TO EX. POND. RIPRAP TO

REMAIN SHALL BE ADJUSTED TO MEET

PROPOSED GRADES.

EX. 4" W

INV=50.37

EX. 8" RW

INV=49.24

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INV=32.62

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DETAIL D-11

AA CO.

TYPE A-1 MH

DETAIL D-11

AA CO.

TYPE A-1 MH

SEE SHT. C-5-5

24" END SEC.

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PROPOSED

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18" HDPE

FROM I-109

INV=35.26

PROP. 6" FDC

INV=32.88

EX. UGE (TBR)

INV=35.37

EX. UGE (TBR)

INV=36.51

PROP. 1" UGE

INV=37.50

EX. 2" COMM

INV=37.64

8" HDPE

FROM TD-1

INV=41.81

15" HDPE

FROM S-107

INV=45.89

EX. 2" COMM

INV=48.59

EX. UGE

INV=49.98

EX. 8" S

INV=38.88

(3) PROP.

4" UGE

INV=50.53

FUTURE

GRADE

PAVED

DRIVE

ROP II

CLASS I

W = 15 FT

La = 13 FT

T = 19 IN

H = 12 IN

(2) 6" HDPE

FROM TD-2 &

ROOF DRAIN

INV=48.50

PROP.

8" RW

INV=42.32

EX. 4" W

INV=49.92

PROP.

6" FDC

INV=50.35

EX. 8" S

INV=40.00

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TYPE A-1 MH

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PROPOSED

GRADE

PROP.

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INV=33.82

24" HDPE

TO ES-101

INV=34.76

18" HDPE

FROM MH-103

INV=35.26

PROP.

4" UGE

INV=40.37

PROP.

4" COMM

INV=42.40

PROP.

2" & 4" COMM

INV=51.06

PROP. 1" UGE

INV=49.83

PROP.

2" & 4" COMM

INV=43.72

EX. 8" RW

INV=49.41

8" HDPE

FROM ROOF

DRAIN

INV=46.17

FUTURE

GRADE

℄TRENCH DRAIN & PAVEMENT

(2) PROP. 2" UGE

INV=51.30

(3) PROP. 4" UGE

INV=48.67

(8) PROP. 2" UGE

INV=41.70

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MD SHA

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SEE SHT. C-5-5

18" END SEC.

PROP. 8" S

INV=46.17

PROP. 15" HDPE

@ 2.00%

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PROPOSED

GRADE

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INV=50.60

PROP. 4" W

INV=49.42

PROP. 8" RW

INV=49.06

PROP.

6" FDC

INV=49.01

FUTURE

GRADE

ROP I

CLASS I

W = 11.5 FT

La = 10 FT

T = 19 IN

H = 9 IN

PROP. 1" UGE

INV=49.92

(2) 2" UGE

INV=50.63

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NYLOPLAST

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PROPOSED

& FUTURE

GRADE

PROP. TRENCH DRAIN

(TD-3)

EX. 8" S

INV=39.62

EX. 8" S

INV=39.29

15" HDPE

TO I-104

INV=43.52

EX. 2" COMM

INV=49.58

PROP. 2" UGE

INV=50.12

EX. 8" S

INV=39.14

EX. 8" S

INV=39.14

EX. UGE

INV=50.53

PROP. 8" HDPE

@ 5.00%

S

EX. 2" COMM

INV=50.48

15" HDPE

FROM I-106

INV=43.62

(2) 6" HDPE

FROM TD-2 &

ROOF DRAIN

INV=47.50

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EXISTING

GROUND

PROPOSED

GRADE

EX.

SMH-2

SMH

SEE SHEET C-5-6

48" DROP MH

AA CO.

DETAIL S-11

STANDARD PRECAST MH

SCO

PROP. 8" S (PVC)

@ 2.00%

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EX.

SMH-2A

EX.

SMH-3

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PROP.

TRENCH

DRAIN

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PROP. 4" S (PVC)

@ 5.00%

FUTURE

GRADE

STUB FOR

FUTURE

EJECTOR PUMP

CONNECTION

FROM LODGE

INV = 41.81

P

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DRAIN (TD-1)

MH

PROP. 8" HDPE

@ 3.00%

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FROM I-104

INV=38.44

18" HDPE

TO MH-102

INV=38.19

DETAIL D-11

AA CO.

TYPE A-1 MH

PROP. 6" HDPE

@ 8.33%

PROP. TRENCH

DRAIN (TD-2)

EX. ROOF DRAIN

TO BE BURIED

AND CONNECTED

TO I-105

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PROP. 6" HDPE

@ 7.14%

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15" HDPE

FROM S-107

INV=45.89

15" HDPE

FROM I-106

INV=43.62

15" HDPE

TO I-104

INV=43.52

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

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Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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B-4-1 STANDARDS AND SPECIFICATIONS

FOR

INCREMENTAL STABILIZATION

DEFINITION

ESTABLISHMENT OF VEGETATIVE COVER ON CUT AND FILL SLOPES.

PURPOSE

TO PROVIDE TIMELY VEGETATIVE COVER ON CUT AND FILL SLOPES AS WORK PROGRESSES.

CONDITIONS WHERE PRACTICE APPLIES

ANY CUT OR FILL SLOPE GREATER THAN 15 FEET IN HEIGHT. THIS PRACTICE ALSO APPLIES TO STOCKPILES.

CRITERIA

A. INCREMENTAL STABILIZATION - CUT SLOPES

1. EXCAVATE AND STABILIZE CUT SLOPES IN INCREMENTS NOT TO EXCEED 15 FEET IN HEIGHT. PREPARE SEEDBED

AND APPLY SEED AND MULCH ON ALL CUT SLOPES AS THE WORK PROGRESSES.

2. CONSTRUCTION SEQUENCE EXAMPLE (REFER TO FIGURE B.1):

A. CONSTRUCT AND STABILIZE ALL TEMPORARY SWALES OR DIKES THAT WILL BE USED TO CONVEY RUNOFF AROUND THE

EXCAVATION.

B. PERFORM PHASE 1 EXCAVATION, PREPARE SEEDBED, AND STABILIZE.

C. PERFORM PHASE 2 EXCAVATION, PREPARE SEEDBED, AND STABILIZE.OVERSEED PHASE 1 AREAS AS NECESSARY.

D. PERFORM FINAL PHASE EXCAVATION, PREPARE SEEDBED, AND STABILIZE. OVERSEED PREVIOUSLY SEEDED AREAS AS

NECESSARY.

NOTE: ONCE EXCAVATION HAS BEGUN THE OPERATION SHOULD BE CONTINUOUS FROM GRUBBING THROUGH THE

COMPLETION OF GRADING AND PLACEMENT OF TOPSOIL (IF REQUIRED) AND PERMANENT SEED AND MULCH. ANY

INTERRUPTIONS IN THE OPERATION OR COMPLETING THE OPERATION OUT OF THE SEEDING SEASON WILL NECESSITATE

THE APPLICATION OF TEMPORARY STABILIZATION.

FIGURE B.1: INCREMENTAL STABILIZATION - CUT

B. INCREMENTAL STABILIZATION - FILL SLOPES

1. CONSTRUCT AND STABILIZE FILL SLOPES IN INCREMENTS NOT TO EXCEED 15 FEET IN HEIGHT. PREPARE SEEDBED

AND APPLY SEED AND MULCH ON ALL SLOPES AS THE WORK PROGRESSES.

2. STABILIZE SLOPES IMMEDIATELY WHEN THE VERTICAL HEIGHT OF A LIFT REACHES 15 FEET, OR WHEN THE

GRADING OPERATION CEASES AS PRESCRIBED IN THE PLANS.

3. AT THE END OF EACH DAY, INSTALL TEMPORARY WATER CONVEYANCE PRACTICE(S), AS NECESSARY, TO

INTERCEPT SURFACE RUNOFF AND CONVEY IT DOWN THE SLOPE IN A NON-EROSIVE MANNER.

4. CONSTRUCTION SEQUENCE EXAMPLE (REFER TO FIGURE B.2):

A. CONSTRUCT AND STABILIZE ALL TEMPORARY SWALES OR DIKES THAT WILL BE USED TO DIVERT RUNOFF AROUND THE

FILL. CONSTRUCT SILT FENCE ON LOW SIDE OF FILL UNLESS OTHER METHODS SHOWN ON THE PLANS ADDRESS THIS

AREA.

B. AT THE END OF EACH DAY, INSTALL TEMPORARY WATER CONVEYANCE PRACTICE(S), AS NECESSARY, TO INTERCEPT

SURFACE RUNOFF AND CONVEY IT DOWN THE SLOPE IN A NON-EROSIVE MANNER.

C. PLACE PHASE 1 FILL, PREPARE SEEDBED, AND STABILIZE.

D. PLACE PHASE 2 FILL, PREPARE SEEDBED, AND STABILIZE.

E. PLACE FINAL PHASE FILL, PREPARE SEEDBED, AND STABILIZE. OVERSEED PREVIOUSLY SEEDED AREAS AS NECESSARY.

NOTE: ONCE THE PLACEMENT OF FILL HAS BEGUN THE OPERATION SHOULD BE CONTINUOUS FROM GRUBBING

THROUGH THE COMPLETION OF GRADING AND PLACEMENT OF TOPSOIL (IF REQUIRED) AND PERMANENT SEED AND

MULCH. ANY INTERRUPTIONS IN THE OPERATION OR COMPLETING THE OPERATION OUT OF THE SEEDING SEASON WILL

NECESSITATE THE APPLICATION OF TEMPORARY STABILIZATION.

FIGURE B.2: INCREMENTAL STABILIZATION - FILL

B-3 STANDARDS AND SPECIFICATIONS

FOR

LAND GRADING

DEFINITION

RESHAPING THE EXISTING LAND SURFACE TO PROVIDE SUITABLE TOPOGRAPHY FOR BUILDING FACILITIES AND

OTHER SITE IMPROVEMENTS.

PURPOSE

TO PROVIDE EROSION CONTROL AND VEGETATIVE ESTABLISHMENT FOR EXTREME CHANGES IN GRADE.

CONDITIONS WHERE PRACTICE APPLIES

EARTH DISTURBANCES OR EXTREME GRADE MODIFICATIONS ON STEEP OR LONG SLOPES.

DESIGN CRITERIA

THE GRADING PLAN SHOULD BE BASED ON THE INCORPORATION OF BUILDING DESIGNS AND STREET LAYOUTS

THAT FIT AND UTILIZE EXISTING TOPOGRAPHY AND DESIRABLE NATURAL SURROUNDINGS TO AVOID EXTREME

GRADE MODIFICATIONS. INFORMATION SUBMITTED MUST PROVIDE SUFFICIENT TOPOGRAPHIC SURVEYS AND

SOIL INVESTIGATIONS TO DETERMINE LIMITATIONS THAT MUST BE IMPOSED ON THE GRADING OPERATION

RELATED TO SLOPE STABILITY, ADJACENT PROPERTIES, DRAINAGE PATTERNS, MEASURES FOR WATER REMOVAL, AND VEGETATIVE TREATMENT, ETC.

MANY JURISDICTIONS HAVE REGULATIONS AND DESIGN PROCEDURES ALREADY ESTABLISHED FOR LAND

GRADING THAT MUST BE FOLLOWED. THE PLAN MUST SHOW EXISTING AND PROPOSED CONTOURS FOR THE

AREA(S) TO BE GRADED INCLUDING PRACTICES FOR EROSION CONTROL, SLOPE STABILIZATION, AND SAFE

CONVEYANCE OF RUNOFF (E.G., WATERWAYS, LINED CHANNELS, REVERSE BENCHES, GRADE STABILIZATION

STRUCTURES). THE GRADING/CONSTRUCTION PLANS ARE TO INCLUDE THE PHASING OF THESE PRACTICES AND

CONSIDERATION OF THE FOLLOWING:

1. PROVISIONS TO SAFELY CONVEY SURFACE RUNOFF TO STORM DRAINS, PROTECTED OUTLETS OR

STABLE WATER COURSES TO ENSURE THAT SURFACE RUNOFF WILL NOT DAMAGE SLOPES OR OTHER

GRADED AREAS.

2. CUT AND FILL SLOPES, STABILIZED WITH GRASSES, NO STEEPER THAN 2:L. (WHERE THE SLOPE IS TO BE

MOWED, THE SLOPE SHOULD BE NO STEEPER THAN 3:L, BUT 4:L IS PREFERRED BECAUSE OF SAFETY

FACTORS RELATED TO MOWING STEEP SLOPES.) SLOPES STEEPER THAN 2:L REQUIRE SPECIAL DESIGN

AND STABILIZATION CONSIDERATIONS TO BE SHOWN ON THE PLANS.

3. BENCHING PER DETAIL B-3-1 WHENEVER THE VERTICAL INTERVAL (HEIGHT) OF ANY 2:L SLOPE EXCEEDS

20 FEET; FOR 3:L SLOPES, WHEN IT EXCEEDS 30 FEET; AND FOR 4:L SLOPES, WHEN IT EXCEEDS 40 FEET.

LOCATE BENCHES TO DIVIDE THE SLOPE FACE AS EQUALLY AS POSSIBLE AND TO CONVEY THE WATER

TO A STABLE OUTLET. SOILS, SEEPS, ROCK OUTCROPS, ETC. ARE TO BE TAKEN INTO CONSIDERATION

WHEN DESIGNING BENCHES.

A. PROVIDE BENCHES WITH A MINIMUM WIDTH OF SIX FEET FOR EASE OF MAINTENANCE.

B. DESIGN BENCHES WITH A REVERSE SLOPE OF 6:L OR FLATTER TO THE TOE OF THE UPPER SLOPE

AND WITH A MINIMUM OF ONE FOOT IN DEPTH. GRADE THE LONGITUDINAL SLOPE OF THE BENCH

BETWEEN 2 PERCENT AND 3 PERCENT, UNLESS ACCOMPANIED BY APPROPRIATE DESIGN AND

COMPUTATIONS.

C. THE MAXIMUM ALLOWABLE FLOW LENGTH WITHIN A BENCH IS 800 FEET UNLESS ACCOMPANIED BY

APPROPRIATE DESIGN AND COMPUTATIONS.

4. DIVERSION OF SURFACE WATER FROM THE FACE OF ALL CUT AND FILL SLOPES USING EARTH DIKES OR

SWALES. CONVEY SURFACE WATER DOWN SLOPE USING A DESIGNED STRUCTURE, AND:

A. PROTECT THE FACE OF ALL GRADED SLOPES FROM SURFACE RUNOFF UNTIL THEY ARE

STABILIZED.

B. DO NOT SUBJECT THE SLOPE’S FACE TO ANY CONCENTRATED FLOW OF SURFACE WATER SUCH

AS FROM NATURAL DRAINAGE WAYS, GRADED SWALES, DOWNSPOUTS, ETC.

C. PROTECT THE FACE OF THE SLOPE BY SPECIAL EROSION CONTROL MATERIALS TO INCLUDE, BUT

NOT BE LIMITED TO, APPROVED VEGETATIVE STABILIZATION PRACTICES, RIPRAP OR OTHER

APPROVED STABILIZATION METHODS.

5. SERRATED SLOPE AS SHOWN IN DETAIL B-3-2. THE STEEPEST ALLOWABLE SLOPE FOR RIPABLE ROCK IS

1.5:1. FOR NON ROCK SURFACES, THE SLOPES ARE TO BE 2:1 OR FLATTER. THESE STEPS WILL

WEATHER AND ACT TO HOLD MOISTURE, LIME, FERTILIZER AND SEED THUS PRODUCING A MUCH

QUICKER AND LONGER LIVED VEGETATIVE COVER AND BETTER SLOPE STABILIZATION.

6. SUBSURFACE DRAINAGE PROVISIONS. PROVIDE SUBSURFACE DRAINAGE WHERE NECESSARY TO

INTERCEPT SEEPAGE THAT WOULD OTHERWISE ADVERSELY AFFECT SLOPE STABILITY OR CREATE

EXCESSIVELY WET SITE CONDITIONS.

7. PROXIMITY TO ADJACENT PROPERTY. SLOPES MUST NOT BE CREATED CLOSE TO PROPERTY LINES

WITHOUT ADEQUATE PROTECTION AGAINST SEDIMENTATION, EROSION, SLIPPAGE, SETTLEMENT, SUBSIDENCE, OR OTHER RELATED DAMAGES.

8. QUALITY OF FILL MATERIAL. FILL MATERIAL MUST BE FREE OF BRUSH, RUBBISH, LOGS, STUMPS, BUILDING DEBRIS, AND OTHER OBJECTIONABLE MATERIAL. DO NOT PLACE FROZEN MATERIALS IN THE

FILL NOR PLACE THE FILL MATERIAL ON A FROZEN FOUNDATION.

9. STABILIZATION. STABILIZE ALL DISTURBED AREAS STRUCTURALLY OR VEGETATIVELY IN COMPLIANCE

WITH SECTION B-4 STANDARDS AND SPECIFICATIONS FOR STABILIZATION PRACTICES.

MAINTENANCE

THE LINE, GRADE, AND CROSS SECTION OF BENCHING AND SERRATED SLOPES MUST BE MAINTAINED. BENCHES

AND SERRATED SLOPES MUST CONTINUOUSLY MEET THE REQUIREMENTS FOR ADEQUATE VEGETATIVE

ESTABLISHMENT IN ACCORDANCE WITH

SECTION B-4 VEGETATIVE STABILIZATION.

B-4 STANDARDS AND SPECIFICATIONS

FOR

VEGETATIVE STABILIZATION

DEFINITION

USING VEGETATION AS COVER TO PROTECT EXPOSED SOIL FROM EROSION.

PURPOSE

TO PROMOTE THE ESTABLISHMENT OF VEGETATION ON EXPOSED SOIL.

CONDITIONS WHERE PRACTICE APPLIES

ON ALL DISTURBED AREAS NOT STABILIZED BY OTHER METHODS. THIS SPECIFICATION IS DIVIDED INTO

SECTIONS ON INCREMENTAL STABILIZATION; SOIL PREPARATION, SOIL AMENDMENTS AND TOPSOILING;

SEEDING AND MULCHING; TEMPORARY STABILIZATION; AND PERMANENT STABILIZATION.

EFFECTS ON WATER QUALITY AND QUANTITY

STABILIZATION PRACTICES ARE USED TO PROMOTE THE ESTABLISHMENT OF VEGETATION ON EXPOSED SOIL.

WHEN SOIL IS STABILIZED WITH VEGETATION, THE SOIL IS LESS LIKELY TO ERODE AND MORE LIKELY TO ALLOW

INFILTRATION OF RAINFALL, THEREBY REDUCING SEDIMENT LOADS AND RUNOFF TO DOWNSTREAM AREAS.

PLANTING VEGETATION IN DISTURBED AREAS WILL HAVE AN EFFECT ON THE WATER BUDGET, ESPECIALLY ON

VOLUMES AND RATES OF RUNOFF, INFILTRATION, EVAPORATION, TRANSPIRATION, PERCOLATION, AND

GROUNDWATER RECHARGE. OVER TIME, VEGETATION WILL INCREASE ORGANIC MATTER CONTENT AND

IMPROVE THE WATER HOLDING CAPACITY OF THE SOIL AND SUBSEQUENT PLANT GROWTH.

VEGETATION WILL HELP REDUCE THE MOVEMENT OF SEDIMENT, NUTRIENTS, AND OTHER CHEMICALS CARRIED

BY RUNOFF TO RECEIVING WATERS. PLANTS WILL ALSO HELP PROTECT GROUNDWATER SUPPLIES BY

ASSIMILATING THOSE SUBSTANCES PRESENT WITHIN THE ROOT ZONE.

SEDIMENT CONTROL PRACTICES MUST REMAIN IN PLACE DURING GRADING, SEEDBED PREPARATION, SEEDING, MULCHING, AND VEGETATIVE ESTABLISHMENT.

ADEQUATE VEGETATIVE ESTABLISHMENT

INSPECT SEEDED AREAS FOR VEGETATIVE ESTABLISHMENT AND MAKE NECESSARY REPAIRS, REPLACEMENTS, AND RESEEDINGS WITHIN THE PLANTING SEASON.

1. ADEQUATE VEGETATIVE STABILIZATION REQUIRES 95 PERCENT GROUNDCOVER.

2. IF AN AREA HAS LESS THAN 40 PERCENT GROUNDCOVER, RESTABILIZE FOLLOWING THE ORIGINAL

RECOMMENDATIONS FOR LIME, FERTILIZER, SEEDBED PREPARATION, AND SEEDING.

3. IF AN AREA HAS BETWEEN 40 AND 94 PERCENT GROUNDCOVER, OVER-SEED AND FERTILIZE USING HALF

OF THE RATES ORIGINALLY SPECIFIED.

4. MAINTENANCE FERTILIZER RATES FOR PERMANENT SEEDING ARE SHOWN IN TABLE B.6.

B-4-2 STANDARDS AND SPECIFICATIONS

FOR

SOIL PREPARATION, TOPSOILING, AND SOIL AMENDMENTS

B-4-3 STANDARDS AND SPECIFICATIONS

FOR

SEEDING AND MULCHING

EMBANKMENT

EMBANKMENT

EMBANKMENT

REFER TO LANDSCAPE PLANS, DETAILS, AND SPECIFICATION 329113 "SOIL PREPARATION".

REFER TO LANDSCAPE PLANS, DETAILS, AND SPECIFICATION 329200 "TURF AND GRASSES".

Smithsonian Institution

Washington, DC 20024-2520 600 Maryland Avenue S.W. Suite 5001

Smithsonian Facilities

Dewberry Engineers Inc.

10461 MILL RUN CIRCLE

SUITE 300

OWINGS MILLS, MD 21117

(P) 410.265.9500

WWW.DEWBERRY.COM

Federal Reserve Bank Building

100 North 6th Street

Philadelphia, PA 19106-1590

Tel: 215-923-2020 Fax: 215-574-0952

PROFESSIONAL

CERTIFICATION:

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B-4-5 STANDARDS AND SPECIFICATIONS

FOR

PERMANENT STABILIZATION

B-4-4 STANDARDS AND SPECIFICATIONS

FOR

TEMPORARY STABILIZATION

DEFINITION:

TO STABILIZE DISTURBED SOILS WITH VEGETATION FOR UP TO 6 MONTHS.

PURPOSE:

TO USE FAST GROWING VEGETATION THAT PROVIDES COVER ON DISTURBED SOILS.

CONDITIONS WHERE PRACTICE APPLIES:

EXPOSED SOILS WHERE GROUND COVER IS NEEDED FOR A PERIOD OF 6 MONTHS OF LESS. FOR LONGER DURATION OF

TIME, PERMANENT STABILIZATION PRACTICES ARE REQUIRED.

CRITERIA:

1. SELECT ONE OR MORE OF THE SPECIES OR SEED MIXTURES LISTED IN TABLE B.1 FOR THE APPROPRIATE PLANT

HARDINESS ZONE (FIGURE B.3) AND ENTER THEM IN THE TEMPORARY SEEDING SUMMARY (BELOW) ALONG WITH

APPLICATION RATES, SEEDING DATES AND SEEDING DEPTHS.

2. FOR SITES HAVING SOIL TESTS PERFORMED, USE AND SHOW THE RECOMMENDED RATES BY THE TESTING

AGENCY (SEE TEMPORARY SEEDING SUMMARY THIS SHEET). SOIL TESTS ARE NOT REQUIRED FOR TEMPORARY

SEEDING.

3. WHEN STABILIZATION IS REQUIRED OUTSIDE OF A SEEDING SEASON, APPLY SEED AND MULCH OR STRAW MULCH

ALONE AS PRESCRIBED IN SECTION B-4-3.A.1.B AND MAINTAIN UNTIL THE NEXT SEEDING SEASON.

B-4-8 STANDARDS AND SPECIFICATIONS

FOR

STOCKPILE AREA

DEFINITION

A MOUND OR PILE OF SOIL PROTECTED BY APPROPRIATELY DESIGNED EROSION AND SEDIMENT CONTROL

MEASURES

PURPOSE

TO PROVIDE A DESIGNATED LOCATION FOR THE TEMPORARY STORAGE OF SOIL THAT CONTROLS THE POTENTIAL

FOR EROSION, SEDIMENTATION, AND CHANGES TO DRAINAGE PATTERNS.

CONDITIONS WHERE PRACTICE APPLIES

STOCKPILE AREAS ARE UTILIZED WHEN IT IS NECESSARY TO SALVAGE AND STORE SOIL

FOR LATER USE.

CRITERIA

1. THE STOCKPILE LOCATION AND ALL RELATED SEDIMENT CONTROL PRACTICES MUST BE CLEARLY

INDICATED ON THE EROSION AND SEDIMENT CONTROL PLAN.

2. THE FOOTPRINT OF THE STOCKPILE MUST BE SIZED TO ACCOMMODATE THE ANTICIPATED VOLUME OF

MATERIAL AND BASED ON A SIDE SLOPE RATIO NO STEEPER THAN 2:1. BENCHING MUST BE PROVIDED IN

ACCORDANCE WITH SECTION B-3 LAND GRADING.

3. RUNOFF FROM THE STOCKPILE AREA MUST DRAIN TO A SUITABLE SEDIMENT CONTROL PRACTICE.

4. ACCESS THE STOCKPILE AREA FROM THE UPGRADE SIDE.

5. CLEAR WATER RUNOFF INTO THE STOCKPILE AREA MUST BE MINIMIZED BY USE OF A DIVERSION DEVICE

SUCH AS AN EARTH DIKE, TEMPORARY SWALE OR DIVERSION FENCE. PROVISIONS MUST BE MADE FOR

DISCHARGING CONCENTRATED FLOW IN A NON-EROSIVE MANNER.

6. WHERE RUNOFF CONCENTRATES ALONG THE TOE OF THE STOCKPILE FILL, AN APPROPRIATE

EROSION/SEDIMENT CONTROL PRACTICE MUST BE USED TO INTERCEPT THE DISCHARGE.

7. STOCKPILES MUST BE STABILIZED IN ACCORDANCE WITH THE 3/7 DAY STABILIZATION REQUIREMENT AS

WELL AS STANDARD B-4-1 INCREMENTAL STABILIZATION AND STANDARD B-4-4 TEMPORARY STABILIZATION.

8. 8. IF THE STOCKPILE IS LOCATED ON AN IMPERVIOUS SURFACE, A LINER SHOULD BE PROVIDED BELOW

THE STOCKPILE TO FACILITATE CLEANUP. STOCKPILES CONTAINING CONTAMINATED MATERIAL MUST BE

COVERED WITH IMPERMEABLE SHEETING.

B-4-6 STANDARDS AND SPECIFICATIONS

FOR

SOIL STABILIZATION MATTING

DEFINITION

MATERIAL USED TO TEMPORARILY OR PERMANENTLY STABILIZE CHANNELS OR STEEP SLOPES UNTIL GROUNDCOVER IS

ESTABLISHED.

PURPOSE

TO PROTECT THE SOILS UNTIL VEGETATION IS ESTABLISHED.

CONDITIONS WHERE PRACTICE APPLIES

ON NEWLY SEEDED SURFACES TO PREVENT THE APPLIED SEED FROM WASHING OUT; IN CHANNELS AND ON STEEP

SLOPES WHERE THE FLOW HAS EROSIVE VELOCITIES OR CONVEYS CLEAR WATER; ON TEMPORARY SWALES, EARTH

DIKES, AND PERIMETER DIKE SWALES AS REQUIRED BY THE RESPECTIVE DESIGN STANDARD; AND, ON STREAM BANKS

WHERE MOVING WATER IS LIKELY TO WASH OUT NEW VEGETATIVE PLANTINGS.

DESIGN CRITERIA

1. THE SOIL STABILIZATION MATTING THAT IS USED MUST WITHSTAND THE FLOW VELOCITIES AND SHEAR STRESSES

DETERMINED FOR THE AREA, BASED ON THE 2-YEAR, 24-HOUR FREQUENCY STORM FOR TEMPORARY

APPLICATIONS AND THE 10-YEAR, 24-HOUR FREQUENCY STORM FOR PERMANENT APPLICATIONS. DESIGNATE ON

THE PLAN THE TYPE OF SOIL STABILIZATION MATTING USING THE STANDARD SYMBOL AND INCLUDE THE

CALCULATED SHEAR STRESS FOR THE RESPECTIVE TREATMENT AREA.

2. MATTING IS REQUIRED ON PERMANENT CHANNELS WHERE THE RUNOFF VELOCITY EXCEEDS TWO AND HALF FEET

PER SECOND (2.5 FPS) OR THE SHEAR STRESS EXCEEDS TWO POUNDS PER SQUARE FOOT (2 LBS/FT2). ON

TEMPORARY CHANNELS DISCHARGING TO A SEDIMENT TRAPPING PRACTICE, PROVIDE MATTING WHERE THE

RUNOFF VELOCITY EXCEEDS FOUR FEET PER SECOND (4 FPS).

3. TEMPORARY SOIL STABILIZATION MATTING IS MADE WITH DEGRADABLE (LASTS 6 MONTHS MINIMUM), NATURAL, OR MANMADE FIBERS OF UNIFORM THICKNESS AND DISTRIBUTION OF FIBERS THROUGHOUT AND IS SMOLDER

RESISTANT. THE MAXIMUM PERMISSIBLE VELOCITY FOR TEMPORARY MATTING IS 6 FEET PER SECOND.

MAINTENANCE

THE STOCKPILE AREA MUST CONTINUOUSLY MEET THE REQUIREMENTS FOR ADEQUATE VEGETATIVE

ESTABLISHMENT IN ACCORDANCE WITH SECTION B-4 VEGETATIVE STABILIZATION. SIDE SLOPES MUST BE

MAINTAINED AT NO STEEPER THAN A 2:1 RATIO. THE STOCKPILE AREA MUST BE KEPT FREE OF EROSION. IF THE

VERTICAL HEIGHT OF A STOCKPILE EXCEEDS 20 FEET FOR 2:1 SLOPES, 30 FEET FOR 3:1 SLOPES, OR 40 FEET FOR

4:1 SLOPES, BENCHING MUST BE PROVIDED IN ACCORDANCE WITH SECTION B-3 LAND GRADING.

TABLE H.1: GEOTEXTILE FABRICS

PROPERTY TEST METHOD MD CD MD CD MD CD

MINIMUM AVERAGE ROLL VALUE*

WOVEN SILT

FILM

GEOTEXTILE

WOVEN

MONOFILAMENT

GEOTEXTILE

NONWOVEN

GEOTEXTILE

GRAB TENSILE STRENGTH

GRAB TENSILE ELONGATION

TRAPEZOIDAL TEAR STRENGTH

PUNCTURE STRENGTH

APPARENT OPENING

SIZE**

PERMITTIVITY

ULTRAVIOLET RESISTANCE

RETAINED AT 500 HOURS

ASTM D-4362

ASTM D-4362

ASTM D-4533

ASTM D-6241

ASTM D-4751

ASTM D-4491

ASTM D-4355

200LB

15%

75LB

200LB

10%

75LB

370LB

15%

100LB

250LB

15%

60LB

200LB

15%

80LB

200LB

50%

80LB

450LB 900LB

U.S. SIEVE 30

(0.59MM)

0.05 SEC⁻¹

450LB

U.S. SIEVE 70

(0.21MM)

U.S. SIEVE 70

(0.21MM)

0.28 SEC⁻¹ 1.1 SEC⁻¹

70% STRENGTH 70% STRENGTH 70% STRENGTH

* ALL NUMERIC VALUES EXCEPT APPARENT OPENING SIZE (AOS) REPRESENT

MINIMUM AVERAGE ROLL VALUES (MARV). MARV IS CALCULATED AS THE

TYPICAL MINUS TWO STANDARD DEVIATIONS. MD IS MACHINE DIRECTION; CD

IS CROSS DIRECTION.

** VALUES FOR AOS REPRESENT THE AVERAGE MAXIMUM OPENING.

4. PERMANENT SOIL STABILIZATION MATTING IS AN OPEN WEAVE, SYNTHETIC MATERIAL CONSISTING OF NON-

DEGRADABLE FIBERS OR ELEMENTS OF UNIFORM THICKNESS AND DISTRIBUTION OF WEAVE THROUGHOUT. THE

MAXIMUM PERMISSIBLE VELOCITY FOR PERMANENT MATTING IS 8.5 FEET PER SECOND.

5. CALCULATE CHANNEL VELOCITY AND SHEAR STRESS USING THE FOLLOWING PROCEDURE:

SHEAR STRESS (Τ) IS A MEASURE OF THE FORCE OF MOVING WATER AGAINST THE SUBSTRATE AND IS

CALCULATED AS:

Τ = Γ ⋅ R ⋅SW

WHERE:

Τ = SHEAR STRESS (LB/FT2)

Γ = WEIGHT DENSITY OF WATER (62.4 LB/FT3)

R = AVERAGE WATER DEPTH (HYDRAULIC RADIUS) (FT)

SW = WATER SURFACE SLOPE (FT/FT)

VELOCITY (V) MEASURES THE RATE OF FLOW THROUGH A DEFINED AREA AND IS CALCULATED AS:

V=1.486R S

N

WHERE:

V = VELOCITY (FT/SEC)

N = MANNING’S ROUGHNESS COEFFICIENT

R = HYDRAULIC RADIUS (FT)

S = CHANNEL SLOPE (FT/FT)

6. USE TABLE B.7 TO ASSIST IN SELECTING THE APPROPRIATE SOIL STABILIZATION MATTING FOR SLOPE APPLICATIONS

BASED ON THE SLOPE, THE SLOPE LENGTH, AND THE SOIL-ERODIBILITY K FACTOR.

* SLOPE LENGTH INCLUDES CONTRIBUTING FLOW LENGTH.

** SLOPES STEEPER THAN 2:1 MUST BE ENGINEERED.

*** SOIL HAVING A K VALUE LESS THAN OR EQUAL TO 0.35 CAN BE STABILIZED EFFECTIVELY WITH STRAW MULCH OR

WOOD CELLULOSE FIBER WHEN LOCATED ON SLOPES STEEPER THAN 5%. SOIL STABILIZATION MATTING IS

REQUIRED ON ALL SLOPES STEEPER THAN 5% THAT HAVE SOIL WITH A K FACTOR GREATER THAN 0.35. K FACTOR

RATINGS ARE PUBLISHED IN THE NRCS SOIL SURVEY HTTP:// WEBSOILSURVEY.NRCS.USDA.GOV/APP. DURING

CONSTRUCTION OR RECLAMATION, THE SOIL- ERODIBILITY K VALUE SHOULD REPRESENT THE UPPER 6 INCHES OF

THE FINAL FILL MATERIAL RE-SPREAD AS THE LAST LIFT. ONLY THE EFFECTS OF ROCK FRAGMENTS WITHIN THE

SOIL PROFILE ARE CONSIDERED IN THE ESTIMATION OF THE K VALUE. DO NOT ADJUST K VALUES TO ACCOUNT FOR

ROCKS ON THE SOIL SURFACE OR INCREASES IN SOIL ORGANIC MATTER…