Green Village Amendment Four.pdf

(x)

33330221RF0010024

x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT TO BE

RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR

OFFER. If by virtue of this amendment you desire to change an offer already submitted , such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

OCON

Washington DC 20013-7012

MRC 1200

P.O. BOX 37012

SMITHSONIAN INSTITUTION

06/24/20210004

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended , by one of the following methods: (a) By completing

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

05/13/2021

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

E. IMPORTANT: Contractor is not is required to sign this document and return __________________ copies to the issuing office.

ORDER NO. IN ITEM 10A.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

A. The Solicitation Number cited above, for the Green Village Cottages and Site

Improvements, located at the Smithsonian Environmental Research Center (SERC), is hereby amended as follows:

A.1. The Due Date for Receipt of Proposals has been extended to July 7, 2021 at 12:00 noon.

A.2. The "questionnaires" cited in Section 2a. General Contractor, Factor 1 - Past

Performance, will not be required as part of Offerors submission.

A.3. Addendum No. 1 Narrative dated June 11, 2021 is attached hereto and made part of the

Solicitation.

Continued ...

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

(Signature of person authorized to sign) (Signature of Contracting Officer)

Willard B. Powell

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

Except as provided herein, all terms and conditions of the document referenced in Item 9 A or 10A, as heretofore changed, remains unchanged and in full force and effect .

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

2 2

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

33330221RF0010024/0004

END OF AMENDMENT FOUR

Period of Performance: 05/13/2021 to 07/07/2021

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

ADDENDUM NO. 1 - NARRATIVE

DATE:

PROJECT:

June 11, 2021

Smithsonian Institution

Smithsonian Environmental Research

Green Village

OFEO Project No. 1282111

Drawings

1. General

a. Limits of Disturbance updated on all sheets

2. Sheet C-1-1:

a. Indicated trailer and shed to be removed by others.

b. Added callout and boundary to clarify areas of selective clearing that must be coordinated with and approved by COTR.

3. Sheet C-1-3:

a. Added new grading east of dormitory.

b. Added callout and boundary to clarify areas of selective clearing that must be coordinated with and approved by COTR.

4. Sheet C-1-4:

a. Removed temporary electric and telephone connections to trailer which have been removed from this contract.

5. Sheet C-1-5:

a. Added new grading east of dorm.

b. Added new stabilized construction entrance.

c. Added callout and boundary to clarify areas of selective clearing that must be coordinated with and approved by COTR.

d. Modified ssf location around utility construction and second SCE entrance.

e. Updated Sequence of Construction to reflect the above additions.

f. Added note regarding maintenance of existing rain garden and associated veg to ensure contractor endeavors to keep this out of the work area and unimpacted.

6. Sheet C-5-2:

a. Updated LOD area and earthwork volumes to reflect updated grading.

7. Sheet C-5-4:

a. Updated riser structure detail (number 7) to show brick/mortar in weir opening.

8. Sheet T1-01:

a. Included underground telecom pathway from new communications hand hole

CHH-1.3 to existing Building 185 and existing Trailer T5.

End of Addendum No. 1

SHED

Smithsonian Institution Washington, DC 20024-2520

600 Maryland Avenue S.W. Suite 5001 Smithsonian Facilities

FOX CREEK

SELLM

AN CREEK

SMITHSONIAN

PROPERTY

TAX MAP 60

M

UD

DY

C

RE

EK

R D.

(R

TE

. 4

M

UDDY

CENTRAL AVE.

P. 415

CREEK

RD.

214)

C O

N

TEES

W H

AR

F

R O

AD WHITEMARSH

CREEK

BEAR

CREEK

CLUBHOUSE

RD.

JAVA FARMROAD

DOCK

TO WASHINGTON DC

C

AM

P

LETTSR

O

AD

SHORE

W

RD.

GERMANTOW

N

RD.

RHODE

RIVER

SCALE: 1"=2000'

SMITHSONIAN ENVIRONMENTAL RESEARCH CENTER (SERC)

GREEN VILLAGE SITE INFRASTRUCTURE

GREEN VILLAGE SITE INFRASTRUCTURE

MDE #: 20-SF-0117

SF#: 1282111

ROADPROJECT AREA

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:

ROUTE

(M D

Copyright © 2020 by EWINGCOLE

SCALE: 1"=300'

MATHIAS

LAB

SERC

ADMINISTRATION

BUILDING

JA

VA

F

AR

M R

OA

D

CONTEES

W

HARF

RO

AD

SCHMIDT

BUILDING

PROPOSED

GREEN

VILLAGE

PROJECT

EX. SWM POND

N 445,250

E 1, 0, E

W M

W M

T

CO

SD

SD

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

EDGE OF PAVEMENT

GATE

EX. HC SIGNS

EX. 8" RW

GATE

CONC. PORCH

EX. 2" W

CONC. S

/W

W

ALL

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

INVERT

SIGN

SECURITY

DITCH

SIGN

RESEARCH

PARKING

EX. 4" W

EX. 8" R

W

EX

. 4

" R W

EX. 4" R

W

EX. 1" R

W

M

ED

G

E O F U

N

PAVED

R D

ED

G

E O

F

PA

VE

M

EN

T

E

W M

W M

W M

WALL

SD

SD

EDGE OF UNPAVED RD

ED

G

E O F U

N

PAVED

R D

T

TMH TOP

EL=47.19'

RIP RAP

AC

SHED

C m

A (C

D nB

(D

15" TREE

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EX. WOODLAND PARKING

(ASPHALT)

N 445,500

E 1,440,000

N 445250

E

EX

. C

O M

M (A

BA

ND

EX

. E

LE

C

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EXISTING BUILDING TR

EXISTING BUILDING TR

EX. GRAVEL DRAIN TBRM

EX

. P

AV

ER

S

TB

R M

EX. PAVERS TBRM

PAVEMENT TBRM

AND REPLACED

EX. LIGHT POLE

TBRL SEE SITE PLAN

& UTILITY PLAN

EXISTING UTILITY YARD TR

ED

G

E O F U

N

PAVED

R D

TR

ED

G

E O F U

N

PAVED

R D

TR

EX. SIGN TR

EX. TELECOMM PEDESTAL TR

(LOCATION APPROXIMATE)

CONTRACTOR TO LOCATE

CONTINUATION OF ELECTRIC

LINE WITHIN LOD

EX. TRAILER TBR BY OTHERS

EX. SHED

TBR BY

OTHERS

EXISTING CLEAN OUT

EXISTING SIGN

EXISTING ELECTRIC HAND HOLE

EXISTING POWER POLE

EXISTING LIGHT POLE

EXISTING TREE

125 MAGNETIC NAIL SET445402.449 1440298.949 43.45'

PT. # NORTHING EASTING ELEV. DESCRIPTION

TRAVERSE TABLE

103 445323.038 1439760.943 39.03' MAGNETIC NAIL SET

502 MAGNETIC NAIL SET445778.484 1439817.529 101.10'

503 MAGNETIC NAIL SET445709.883 1440130.529 63.50'

504 MAGNETIC NAIL SET445592.779 1440306.266 58.60'

507 MAGNETIC NAIL SET445283.267 1439958.233 35.66'

501 MAGNETIC NAIL SET445575.858 1439614.323 72.79'

500 MAGNETIC NAIL SET445454.500 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 = 1.79 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 OF EXISTING SHED SHOWN "TO BE RELOCATED"

WITH COTR. ONCE EXISTING SHED HAS BEEN RELOCATED, CONTRACTOR SHALL REMOVE

ASSOCIATED CONCRETE SLAB.

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:

EX. PARKING

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.

ALL CLEARING IN THIS

AREA MUST BE

APPROVED BY COTR.

WITH COTR APPROVAL,

SELECT CLEARING IS

PERMITTED FOR

STAGING, STORAGE

AND ACCESS ONLY.

EX. STEP POOL SYSTEMDO NOT DISTURB

FUTURE

COTTAGE #2

R15'

R1 2'

R 50'

FUTURECOTTAGE #3

FUTURE

COTTAGE #5

FUTURE

COTTAGE #4

FUTURE

COTTAGE #6

FUTURE

COTTAGE #1

R 40'

R60'

R 50'

R15

167° 167°

164°

150°

150°

R40'

N 445,250

E 1, 0, T

F.F.=53.91'

B.F.=43.42'

OVERHANG

GATE

EX. HC SIGNS

GATE

CONC. S

/W

W

ALL

EX.

BLDG

F.F.=53.92'

EXISTING BUILDING

OVERHANG

EXISTING BUILDING

F.F.=52.66'

INVERT

SIGN

SECURITY

DITCH

SIGN

RESEARCH

PARKING

WALL

RIP RAP

AC

EX. WOODLAND PARKING

(ASPHALT)

N 445,500

E 1,440,000

N 445250

E

EX

. C

O M

M (A

BA

ND

EX

. E

LE

C

2+13

0+00

0+50

1+00 1+50

2+00

0+

+5

0+

0+

L1

L2

L3

L4

C1

C2

20'

20'

20'PC

+4

9.

PC = 0+91.28

PT = 0+66.56

PT = 1+04.08

10'

10'

20'

44'

34'

61'

20'

17'

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

EX. WOODLAND PARKING

TO JAVA FARM ROAD

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

PATIO

TREE

PIT

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:

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 R

O A

D

EX. GREEN SPACE

13 2

SERC DRIVE

PROP.

PARKING

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

FIRE LANE - NO PARKING

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

FIRE LANE - NO PARKING

FI

R

E

LA

N E

- N O

P

AR

KI

N

G FIR

E LAN

E - N O

PAR

KIN

G

C-5-4

C-5-4

C-5-4

1, 0, TRV # 501

ELEV = 72.79'

E

T

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

EDGE OF PAVEMENT

GATE

EX. HC SIGNS

GATE

CONC. PORCH

CONC. S

/W

W

ALL

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

INVERT

SIGN

SECURITY

DITCH

SIGN

RESEARCH

PARKING

ED

G

E O F U

N

PAVED

R D

ED

G

E O

F

PA

VE

M

EN

T

E

WALL

R

IP R

AP

EDGE OF UNPAVED RD

ED

G

E O F U

N

PAVED

R D

TRENCH DRAIN

INV EL=50.68'

TOP EL=52.18'

TOP EL=43.37'

RIP RAP

AC

SHED

44 42

6" PVC 6" PVC

8" PVC

8" PVC

15" TREE

EX. WOODLAND PARKING

(ASPHALT)

N 445,500

E 1,440,000

N 445250

E

N 445,250

E 1, 9, EX

. C

O M

M (A

BA

ND

EX

. E

LE

C

N 445,250

E

,4

,0

FUTURE

COTTAGE #2

FUTURECOTTAGE #3

FUTURE

COTTAGE #5

FUTURE

COTTAGE #4

FUTURE

COTTAGE #6

FUTURE

COTTAGE #1

ES

MH

MH

I

I

I

I

I

ES

I

ROOF

DRAIN

S

S

I

24" HDPE

18" HDPE

15" HDPE

18" H D

PE

15" H D

PE

" H

D

PE

" H

D

PE

18" HDPE

15" H D

PE

ROOF

DRAIN

(TD-2)

TRENCH DRAIN (TD-1)

15" H

DPE

TRENCH DRAIN

TRENCH DRAIN (TD-3)

54 0

54 3

53 5

53 3

54 15

53 7553 5

54 7

55 0 55 0

55 55

53 9

53 5

51 05 51 3

63 62

FUTURE RETAINING WALL

FUTURE RAILING

FUTURE BUILDING

PROPOSED DRIVE

55 5

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:

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.

3:

M

AX

3:

M

AX

CONNECT TO EX.

ASPH. DRIVE AT

GRADE

EX. STEP POOL SYSTEMDO NOT DISTURB

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.

ALL CLEARING IN THIS

AREA MUST BE

APPROVED BY COTR.

WITH COTR APPROVAL,

SELECT CLEARING IS

PERMITTED FOR

STAGING, STORAGE

AND ACCESS ONLY.

1, 0, TRV # 507ELEV = 35.66'

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

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

EDGE OF PAVEMENT

GATE

EX. HC SIGNS

EX. 8" RW

EX. 8" S

GATE

EX. 8" S

CONC. PORCH

EX. 2" W

EX. 8" S

EX

. 8

" S

CONC. S

/W

W

ALL

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

DITCH

SIGN

RESEARCH

PARKING

LIGHT

POLE

TRV # 102

ELEV = 48.63'

EX. 4" W

EX. 8" R

W

EX

. 4

" R W

EX. 4" R

W

M

LIGHT POLE

LIGHT POLE

ED

G

E O F U

N

PAVED

R D

ED

G

E O

F

PA

VE

M

EN

T

E

W M

W M

W M

WALL

R

IP R

AP

EDGE OF UNPAVED RD

ED

G

E O F U

N

PAVED

R D

T

TRENCH DRAIN

INV EL=50.68'

TOP EL=52.18'

TMH TOP

EL=47.19'

TOP EL=43.37'

RIP RAP

AC

SHED

6" PVC 6" PVC

8" PVC

8" PVC

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EX. WOODLAND PARKING

(ASPHALT)

N 445,500

E 1,440,000

N 445250

E

EX

. C

O M

M (A

BA

ND

EX

. E

LE

C

EX. SMH 2

INVERT

8" PVC (E) = 38.65'

FUTURE

COTTAGE #2

FUTURECOTTAGE #3

FUTURE

COTTAGE #5

FUTURE

COTTAGE #4

FUTURE

COTTAGE #6

FUTURE

COTTAGE #1

ES

MH

MH

I

I

I

I

I

ES

I

ROOF

DRAIN

S

S

I

24" HDPE

18" HDPE

15" HDPE

18" H D

PE

15" H D

PE

" H

D

PE

" H

D

PE

18" HDPE

15" H D

PE

ROOF

DRAIN

(TD-2)

TRENCH DRAIN (TD-1)

15" H

DPE

TRENCH DRAIN

TRENCH DRAIN (TD-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:

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

EX. WOODLAND PARKING

TO JAVA FARM ROAD

EX. UTILITY YARD

2x6" PVC CONDUIT

COORDINATE WITH BGE

PROP. 6" DIP DRY FDC

PIPINGPROP. FDCPROP. 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 PLANSPVC 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

EX. LIGHT POLE TO

BE RELOCATED AS

SHOWN

SMH

SCO

SCO

SCO

SCO

SCO

8" S

8" 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" 1

32 HB

8" 1

16 HB

8" 18 HB

8" 1

16 HB

8" 1

16 HB

6" 18 HB

6" 18 HB 6" 1

32 HB

8" 1

32 HB

4" 1

32 HB

4" 18 HB

8" 18 HB

(2) 4" 1

16 HB

8" 18

HB

ROCK OUTLET PROTECTION II:

CLASS I RIPRAP

W = 15 FT

La= 13 FT

T = 19 IN

H = 12 IN

D50 = 9.5 IN

ROCK OUTLET PROTECTION I:

CLASS I RIPRAP

W = 11.5 FT

La = 10 FT

T = 19 IN

H = 9 IN

D50 = 9.5 IN.

8" 18 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

1, 0, TRV # 507ELEV = 35.66'

TRV # 500

ELEV = 53.08'

TRV # 501

ELEV = 72.79'

TRV # 103

ELEV = 39.03'

E

W M

W M

T

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

CONC. S

/W

W

ALL

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

INVERT

SIGN

SECURITY

DITCH

SIGN

RESEARCH

PARKING

TRV # 102

ELEV = 48.63'

EX. 8" R

W

EX

. 4

" R W

EX. 4" R

W

M

E

W M

W M

W M

WALL

T

RIP RAP

AC

44 42

15" TREE

APPROX. LOCATION OF EX.

EMERGENCY CALL BOX

EX. WOODLAND PARKING

(ASPHALT)

N 445,500

E 1,440,000

N 445250

E

EX

. C

O M

M (A

BA

ND

EX

. E

LE

C

FUTURE

COTTAGE #2

FUTURECOTTAGE #3

FUTURE

COTTAGE #5

FUTURE

COTTAGE #4

FUTURE

COTTAGE #6

FUTURE

COTTAGE #1

55 55

63 62

ES

MH

MH

I

I

I

I

I

ES

I

ROOF

DRAIN

S

S

I

24" HDPE

18" HDPE

15" HDPE

18" H D

PE

15" H D

PE

" H

D

PE

" H

D

PE

18" HDPE

15" H D

PE

ROOF

DRAIN

(TD-2)

TRENCH DRAIN (TD-1)

15" H

DPE

TRENCH DRAIN

TRENCH DRAIN (TD-3)

P S

D

- 1

S C

E

>50

46 5

STAGING/STORAGE

54 0

54 3

53 5

53 3

54 15

53 75 53 5

54 7

55 0 55 0534

53 5

51 05 51 3

53 9

S C

E

TGOS

55 5

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. NOTE: ALL CLEARING WITHIN THE FORESTED AREA IN THE SOUTHEAST CORNER OF THE SITE MUST BE APPROVED BY COTR PRIOR TO ANY TREE

REMOVALS, CLEARING OR GRUBBING. THIS AREA IS SHOWN ON THE PLAN ABOVE.

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 ENTRANCES, 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:

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

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)

USE EX. RIPRAP TO LINE CHANNEL FROM

FOREBAY TO EX. POND. RIPRAP TO

REMAIN SHALL BE ADJUSTED TO MEET

PROPOSED GRADES.

ALL CLEARING IN THIS

AREA MUST BE

APPROVED BY COTR.

WITH COTR APPROVAL,

SELECT CLEARING IS

PERMITTED FOR

STAGING, STORAGE

AND ACCESS ONLY.

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.

EX. STEP POOL SYSTEMDO NOT DISTURB

I

EX. 4" W

INV=50.37

EX. 8" RW

INV=49.24

I

I

MH

MH

ES

PROP. 6" FH LEAD

INV=32.62

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

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.

0+

IN

V

O U

T:

.6

0+

IN

V

IN

:4

3.

0+

IN

V

O U

T:

.5

0+

IN

V

IN

:3

9.

1+

IN

V

O U

T:

.1

0+

IN

V

IN

:3

5.

1+

IN

V

O U

T:

.7

0+

IN

V

IN

:3

4.

0+

IN

V

O U

T:

.3

0+

IN

V

IN

:3

8.

PROP. 15" HDPE

@ 6.51%

PROP. 15" HDPE

@ 6.50%

PROP. 15" HDPE

@ 5.00%

PROP. 18" HDPE@ 2.50%

PROP. 24" HDPE

@ 0.50%

EXISTING

GROUND

PROPOSED

GRADE

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

I

I

MH

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

DETAIL D-11

AA CO.

TYPE A-1 MH

0+

IN

V

O U

T:

.7

0+

IN

V

IN

:4

5.

1+

IN

V

O U

T:

.9

0+

IN

V

IN

:3

5.

PROP. 15" HDPE@ 3.00%

PROP. 18" HDPE@ 3.00%

EXISTING

GROUND

PROPOSED

GRADE

PROP.

8" RW

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

I

ES

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

DETAIL 374.04

MD SHA

STD. WR INLET

SEE SHT. C-5-5

18" END SEC.

PROP. 8" S

INV=46.17PROP. 15" HDPE

@ 2.00%

PROP. 18" HDPE@ 3.00%

EXISTING

GROUND

PROPOSED

GRADE

0+

IN

V

O U

T:

.4

0+

IN

V

IN

:4

6.

1+

IN

V

O U

T:

.9

0+

IN

V

IN

:3

9.

I

PROP.

2" & 4" COMM

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

S

I

DRAIN BASIN

NYLOPLAST

DETAIL 381.02

MD SHA

PRECAST

YARD INLET

PROP. 15" HDPE

@ 4.50%

0+

IN

V

O U

T:

.0

0+

IN

V

IN

:4

5.

0+

IN

V

IN

:5

0.

0+

IN

V

O U

T:

.6

EXISTING

GROUND

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=50.53PROP. 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

EX 8" S

0+

N V.

8.

V.

9.

EXISTING

GROUND

PROPOSED

GRADE

EX.

SMH-2

SMH

5SEE SHEET C-5-6

48" DROP MH AA CO.

DETAIL S-11

STANDARD PRECAST MH

SCO

PROP. 8" S (PVC)

@ 2.00%

PROP. 8" S (PVC)

@ 2.00%

SMH

EX.

SMH-2A

EX.

SMH-3

EX 8" S

V.

9.

1+

V.

0.

V.

0.

V.

1.

V.

5.

V.

6.

V.

6.

V.

9.

PR

O

P.

5" S

D

IN

V=

.4

PR

O

P.

" S D

IN

V=

.5

IN

V.

.9

PR

O P.

" U

G T

IN

V.

.9

PR

O P.

" U

G E

IN

V.

.2

PR

O P.

" R

W

IN

V.

.5

PR

O P.

" W

IN

V.

.0

PR

O P.

" W

IN

V.

.7

PR

O P.

" R

W

IN

V.

.0

PR

O

P.

" U G

T

IN

V.

.0

(3

) P R

O P.

" U

G E

IN

V.

.9

PR

O P.

" W

IN

V.

.6

PR

O P.

" W

IN

V.

.1

PR

O P.

" U

G E

IN

V.

.7

PR

O P.

" R

W

IN

V.

.1

PR

O P.

" W

IN

V.

.4

PR

O P.

" U

G E

IN

V.

.3

PR

O P.

" U

G T

PR

O

P.

5" S

D

IN

V=

.2

PR

O

P.

8" S

D

IN

V=

.6

EX

. U

G E

IN

V=

U N

K

IN

V.

.2

(3

) P R

O P.

" U

G E

EX

. U

G T

IN

V=

U N

K

EX

. U

G E

IN

V=

U N

K

IN

V.

.8

PR

O P.

" W

EX

. 2

" W

IN

V= U

N K

EX

. 4

" R W

IN

V=

U N

K

IN

V.

.1

PR

O P.

" W

PROP.

TRENCH

DRAIN

IN

V.

.9

PR

O P.

" U

G T

IN

V.

.9

PR

O P.

" U

G E

EX

. U

G E

IN

V=

U N

K

IN

V.

.9

PR

O P.

" R

W

EX

. 1

" R W

(T

BR

IN

V= U

N K

IN

V.

.3

PR

O P.

" U

G T

IN

V.

.4

PR

O P.

" U

G E

IN

V.

.1

PR

O P.

" W

IN

V.

.9

PR

O P.

" W

V.

1.

V.

1.

PROP. 4" S (PVC)

@ 5.00%

FUTURE

GRADE

STUB FOR

FUTURE

EJECTOR PUMP

CONNECTION

FROM LODGE

INV = 41.81

PROP. 4" S (PVC)

@ 5.00%

PROP. TRENCH

DRAIN (TD-1)

MH

PROP. 8" HDPE

@ 3.00%

0+

IN

V

O U

T:

.1

0+

IN

V

IN

:4

1.

15" HDPE

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

I

PROP. 6" HDPE

@ 7.14%

0+

IN

V

IN

:4

8.

0+

IN

V

O U

T:

.0

0+

IN

V

IN

:4

8.

0+

IN

V

O U

T:

.0

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

CERTIFICATION:

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:

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".

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CERTIFICATION:

B-4-5 STANDARDS AND…