ACPh1RTAPlansVol120171109_-_Part_12_of_17.pdf

PDF 10 MB Posted Nov 16, 2017

Attached to: Aircraft Apron and Airfield Site Improvements
Solicitation number: W9123617R0001
Issued by: Department of the Army Corps of Engineers Engineering District Norfolk

About this file

From the source

AC_Ph1_RTA_Plans_Vol1_2017_11_09: Due to large files of Plans Volume 1, a total of 17 parts will be attached for Plans Volume 1: 12 of 17

View the file

Other files

File	Type	Posted
ACPh1RTAPlansVol120171109_-_Part_10_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_13_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_14_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_7_or_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_2_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_3_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_15_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_4_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_16_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_1_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_8_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_9_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_6_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_11_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_17_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109_-_Part_5_of_17.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol320171109.pdf	PDF	Nov 16, 2017
AC_RTA_Geotech_Horiz_2017-07-12.pdf	PDF	Nov 16, 2017
W91236-17-R-0001_Aircraft_Apron_Airfield_Site_Improvement.pdf	PDF	Nov 16, 2017
ACPh1RTASpecsPart220171109.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol220171109.pdf	PDF	Nov 16, 2017
ACPh1RTAPlansVol120171109.zip	ZIP file	Nov 16, 2017
ACPh1RTASpecsPart320171109.pdf	PDF	Nov 16, 2017
ACPh1RTASpecsPart120171109.pdf	PDF	Nov 16, 2017

Show all 24

On GovTribe

Work with this file

Download the original file
Contacts named in this file
Similar government files
Ask GovTribe AI about this file

Try for free Login

Text version

The file's text, extracted by GovTribe without its formatting.

US Army Corps of Engineers ®

SHEET OF

SHEET ID

U S

R M

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

L Y

P R

O J E

C T

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

M E

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

CG516

F C

D P

NOTES:

1. ALL DENUDED AREAS WHICH WILL BE LEFT DORMANT FOR AN EXTENDED PERIOD OF TIME SHALL BE SEEDED WITH FAST

GERMINATING TEMPORARY VEGETATION IMMEDIATELY FOLLOWING GRADING. SELECTION OF THE SEED MIXTURE WILL

DEPEND ON THE TIME OF YEAR IT IS APPLIED ACCORDING TO TABLE 3.31-C. SEEDING MADE IN FALL FOR WINTER COVER

AND DURING HOT AND DRY SUMMER MONTHS SHALL BE MULCHED ACCORDING TO STD. & SPEC. 3.35.

2. ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED WITH PERMANENT SEEDING IMMEDIATELY FOLLOWING

FINISH GRADING. SEEDING SHALL BE DONE ACCORDING TO TABLE 3.32-D.

3. EROSION CONTROL BLANKETS WILL BE INSTALLED OVER FILL SLOPES WHICH HAVE BEEN BROUGHT TO FINAL GRADE AND

HAVE BEEN SEEDED TO PROTECT THE SLOPES FROM RILL AND GULLY EROSION AND TO ALLOW SEED TO GERMINATE

PROPERLY. MULCH WILL BE USED ON RELATIVELY FLAT AREAS.

4. IN ALL SEEDING OPERATIONS, SEED, FERTILIZER AND LIME WILL BE APPLIED PRIOR TO MULCHING. LIME REQUIREMENTS

FOR TEMPORARY SEEDING ACCORDING TO TABLE 3.31-A.

E R

O S

I O

I M

E N

O N

T R

O L

N O

T E

A I L

NOT TO SCALE

VEGETATIVE CONTROL MEASURES

SHEET OF

SHEET ID

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

P R

O J E

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

CG517

F C

D P

SAND FILTER (VDEQ DESIGN SPECIFICATION NO. 12)

INSPECTION AND MAINTENANCE OF PERMANENT STORMWATER MANAGEMENT BMPS

SECTION 9VAC25-870-112 OF THE REGULATIONS SPECIFIES THE CIRCUMSTANCES UNDER WHICH A MAINTENANCE

AGREEMENT MUST BE EXECUTED BETWEEN THE OWNER AND THE LOCAL PROGRAM. THIS SECTION SETS FORTH

INSPECTION REQUIREMENTS, COMPLIANCE PROCEDURES IF MAINTENANCE IS NEGLECTED, NOTIFICATION OF THE LOCAL

PROGRAM UPON TRANSFER OF OWNERSHIP, AND RIGHT-OF-ENTRY FOR LOCAL PROGRAM PERSONNEL.

E R

O S

I O

I M

E N

O N

T R

O L

N O

T E

A I L

PERSON RESPONSIBLE FOR MAINTENANCE INSPECTION AND MAINTENANCE OF BMPS:

MS. PANDORA HOWELL

CHIEF, PORTFOLIO OPTIMIZATION ELEMENT

pandora.m.howell.civ@mail.mil

(MILITARY INSTALLATION UNNAMED AT THE REQUEST OF THE PROJECT SPONSOR)

MAINTENANCE INSPECTIONS

REGULAR INSPECTIONS ARE CRITICAL TO SCHEDULE SEDIMENT REMOVAL OPERATIONS, REPLACE FILTER MEDIA, AND RELIEVE

ANY SURFACE CLOGGING. FREQUENT INSPECTIONS ARE ESPECIALLY NEEDED FOR UNDERGROUND AND PERIMETER FILTERS

SINCE AN ORGANIC MAT CAN QUICKLY CLOG THE FILTER SURFACE. DEPENDING ON THE LEVEL OF TRAFFIC OR THE

PARTICULAR LAND USE, A FILTER SYSTEM MAY BECOME CLOGGED WITHIN A FEW MONTHS OF NORMAL RAINFALL. FREQUENT

MAINTENANCE CAN QUICKLY ESTABLISH A ROUTINE FREQUENCY ACCLIMATED TO THE LAND USE. MAINTENANCE INSPECTIONS

SHOULD BE CONDUCTED WITHIN 24 HOURS FOLLOWING A STORM THAT EXCEEDS 1/2 INCH OF RAINFALL IN ORDER TO

EVALUATE THE CONDITION AND PERFORMANCE OF THE FILTERING PRACTICE, INCLUDING CHECKING FOR THE FOLLOWING:

· CHECK TO SEE IF SEDIMENT ACCUMULATION IN THE SEDIMENTATION CHAMBER HAS EXCEEDED 6 INCHES. IF SO, SCHEDULE

A CLEANOUT.

· CHECK TO SEE IF INLETS AND FLOW SPLITTERS ARE CLEAR OF DEBRIS AND ARE OPERATING PROPERLY.

· CHECK THE DRY SEDIMENT CHAMBER AND SAND FILTER BED FOR ANY EVIDENCE OF STANDING WATER OR PONDING MORE

THAN 48 HOURS AFTER A STORM, AND TAKE NECESSARY CORRECTIVE ACTION TO RESTORE PERMEABILITY.

· DIG A SMALL TEST PIT IN THE SAND FILTER BED TO DETERMINE WHETHER THE FIRST 3 INCHES OF SAND ARE VISIBLY

DISCOLORED AND NEED REPLACEMENT.

· INSPECT WHETHER THE CONTRIBUTING DRAINAGE AREA TO THE FILTER IS STABLE AND NOT A SOURCE OF SEDIMENT.

· CHECK WHETHER TURF ON THE FILTER BED AND BUFFER IS MORE THAN 12 INCHES HIGH, AND SCHEDULE NECESSARY

MOWING OPERATIONS.

· CHECK THE INTEGRITY OF OBSERVATION WELLS AND CLEANOUT PIPES.

· CHECK CONCRETE STRUCTURES AND OUTLETS FOR ANY EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION, ETC.

· ENSURE THAT THE FILTER BED IS LEVEL AND REMOVE TRASH AND DEBRIS FROM THE FILTER BED. SAND OR GRAVEL COVERS

SHOULD BE RAKED TO A DEPTH OF 3 INCHES. FILTERS WITH A TURF COVER SHOULD HAVE 95% VEGETATIVE COVER.

THE RESULTS OF THE INSPECTION WILL THEN DETERMINE THE LEVEL OF MAINTENANCE REQUIRED (ROUTINE OR MAJOR - SEE

TABLE 12.5) EXAMPLE MAINTENANCE INSPECTION CHECKLISTS FOR FILTERING PRACTICES CAN BE ACCESSED IN APPENDIX C

OF CHAPTER 9 OF THE VIRGINIA STORMWATER MANAGEMENT HANDBOOK (2010)

ROUTINE MAINTENANCE TASKS

A CLEANUP SHOULD BE SCHEDULED AT LEAST ONCE A YEAR TO REMOVE TRASH AND FLOATABLES THAT ACCUMULATE IN THE

PRETREATMENT CELLS AND FILTER BED. SEDIMENT CLEANOUTS IN THE DRY AND WET SEDIMENTATION CHAMBERS SHOULD BE

PERFORMED AS NEEDED IN ORDER TO MAINTAIN THE FUNCTION AND PERFORMANCE OF THE FILTER. IF THE FILTER TREATS

RUNOFF FROM A STORMWATER HOTSPOT, CREWS MAY NEED TO TEST THE FILTER BED MEDIA BEFORE DISPOSING OF THE

MEDIA AND TRAPPED POLLUTANTS. TESTING IS NOT NEEDED IF THE FILTER DOES NOT RECEIVE RUNOFF FROM A DESIGNATED

STORMWATER HOTSPOT, IN WHICH CASE THE MEDIA CAN BE SAFELY DISPOSED BY EITHER LAND APPLICATION OR LAND

FILLING.

VEGETATED FILTER STRIP (VDEQ DESIGN SPECIFICATION NO. 2)

MAINTENANCE INSPECTIONS

ANNUAL INSPECTIONS ARE USED TO TRIGGER MAINTENANCE OPERATIONS SUCH AS SEDIMENT REMOVAL, SPOT

RE-VEGETATION AND LEVEL SPREADER REPAIR. IDEALLY, INSPECTIONS SHOULD BE CONDUCTED IN THE NON-GROWING

SEASON WHEN IT EASIER TO SEE THE FLOW PATH.

INSPECTIONS SHOULD CHECK TO ENSURE THAT:

· FLOWS THROUGH THE VEGETATED FILTER STRIP DO NOT SHORT-CIRCUIT THE OVERFLOW CONTROL SECTION;

· DEBRIS AND SEDIMENT DOES NOT BUILD UP AT THE TOP OF THE VEGETATED FILTER STRIP;

· FOOT OR VEHICULAR TRAFFIC DOES NOT COMPROMISE THE GRAVEL DIAPHRAGM;

· SCOUR AND EROSION DO NOT OCCUR WITHIN THE FILTER STRIP;

· SEDIMENTS ARE CLEANED OUT OF LEVEL SPREADER FOREBAYS AND FLOW SPLITTERS; AND

· VEGETATIVE DENSITY EXCEEDS A 90% COVER IN THE BOUNDARY ZONE OR GRASS FILTER.

EXAMPLE MAINTENANCE INSPECTION CHECKLISTS FOR SHEET FLOW TO A VEGETATED FILTER STRIP OR CONSERVED OPEN SPACE

AREAS CAN BE ACCESSED IN APPENDIX C OF CHAPTER 9 OF THE VIRGINIA STORMWATER MANAGEMENT HANDBOOK (2010)

ONGOING MAINTENANCE

ONCE ESTABLISHED, VEGETATED FILTER STRIPS HAVE MINIMAL MAINTENANCE NEEDS OUTSIDE OF THE SPRING CLEANUP, PERIODIC MOWING, REPAIR OF CHECK DAMS AND OTHER MEASURES TO MAINTAIN THE HYDRAULIC EFFICIENCY OF THE STRIP

AND A DENSE, HEALTHY GRASS COVER. VEGETATED FILTER STRIPS THAT CONSIST OF GRASS/TURF COVER SHOULD BE MOWED

AT LEAST TWICE A YEAR TO PREVENT WOODY GROWTH.

DETENTION BASIN (VDEQ DESIGN SPECIFICATION NO. 15)

MAINTENANCE INSPECTIONS

MAINTENANCE OF ED PONDS IS DRIVEN BY ANNUAL INSPECTIONS THAT EVALUATE THE CONDITION AND PERFORMANCE OF THE

POND, INCLUDING THE FOLLOWING:

· MEASURE SEDIMENT ACCUMULATION LEVELS IN FOREBAY.

· MONITOR THE GROWTH OF WETLANDS, TREES AND SHRUBS PLANTED. RECORD THE SPECIES AND THEIR APPROXIMATE

COVERAGE, AND NOTE THE PRESENCE OF ANY INVASIVE PLANT SPECIES.

· INSPECT THE CONDITION OF STORMWATER INLETS TO THE POND FOR MATERIAL DAMAGE, EROSION OR UNDERCUTTING.

· INSPECT THE BANKS OF UPSTREAM AND DOWNSTREAM CHANNELS FOR EVIDENCE OF SLOUGHING, ANIMAL BURROWS, BOGGY AREAS, WOODY GROWTH, OR GULLY EROSION THAT MAY UNDERMINE EMBANKMENT INTEGRITY.

· INSPECT POND OUTFALL CHANNEL FOR EROSION, UNDERCUTTING, RIP-RAP DISPLACEMENT, WOODY GROWTH, ETC.

· INSPECT CONDITION OF PRINCIPAL SPILLWAY AND RISER FOR EVIDENCE OF SPALLING, JOINT FAILURE, LEAKAGE, CORROSION, ETC.

· INSPECT CONDITION OF ALL TRASH RACKS, REVERSE SLOPED PIPES OR FLASHBOARD RISERS FOR EVIDENCE OF CLOGGING, LEAKAGE, DEBRIS ACCUMULATION, ETC.

· INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND LOCKS CAN BE OPENED AND OPERATED.

· INSPECT INTERNAL AND EXTERNAL SIDE SLOPES OF THE POND FOR EVIDENCE OF SPARSE VEGETATIVE COVER, EROSION, OR SLUMPING, AND MAKE NEEDED REPAIRS IMMEDIATELY.

BASED ON INSPECTION RESULTS, SPECIFIC MAINTENANCE TASKS WILL BE TRIGGERED. EXAMPLE MAINTENANCE INSPECTION

CHECKLISTS FOR ED PONDS CAN BE ACCESSED IN APPENDIX C OF CHAPTER 9 OF THE VIRGINIA STORMWATER MANAGEMENT

HANDBOOK (2010).

OIL/WATER SEPARATOR (PROPRIETARY BMP)

REFER TO THE MANUFACTURER'S USER'S MANUAL FOR PROPER INSPECTION AND MAINTENANCE.

NOT TO SCALE

INSPECTION AND MAINTENANCE OF PERMANENT STORMWATER MANAGEMENT BMPS

SHEET OF

SHEET ID

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

P R

O J E

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

CG518

F C

D P

SILT FENCE WITH WIRE SUPPORT(STD. & SPEC. 3.05, VESCH)

INSPECTION AND MAINTENANCE OF TEMPORARY ESC CONTROL MEASURES

TEMPORARY DIVERSION DIKE (STD. & SPEC. 3.09, VESCH)

TEMPORARY SEDIMENT TRAP (STD. & SPEC. 3.13, VESCH)

THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH WILL PREVENT TRACKING OR FLOW OF MUD

ONTO PUBLIC RIGHTS-OF-WAY. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH ADDITIONAL STONE OR

THE WASHING AND REWORKING OF EXISTING STONE AS CONDITIONS DEMAND AND REPAIR AND/OR

CLEANOUT OF ANY STRUCTURES USED TO TRAP SEDIMENT. ALL MATERIALS SPILLED, DROPPED, WASHED, OR TRACKED FROM VEHICLES ONTO ROADWAYS OR INTO STORM DRAINS MUST BE REMOVED IMMEDIATELY.

THE USE OF WATER TRUCKS TO REMOVE MATERIALS DROPPED, WASHED, OR TRACKED ONTO ROADWAYS

WILL NOT BE PERMITTED UNDER ANY CIRCUMSTANCES.

1. SILT FENCES SHALL BE INSPECTED IMMEDIATELY AFTER EACH RAINFALL AND AT LEAST DAILY DURING

PROLONGED RAINFALL. ANY REQUIRED REPAIRS SHALL BE MADE IMMEDIATELY.

2. CLOSE ATTENTION SHALL BE PAID TO THE REPAIR OF DAMAGED SILT FENCE RESULTING FROM END RUNS AND

UNDERCUTTING.

3. SHOULD THE FABRIC ON A SILT FENCE DECOMPOSE OR BECOME INEFFECTIVE PRIOR TO THE END OF THE

EXPECTED USABLE LIFE AND THE BARRIER STILL BE NECESSARY, THE FABRIC SHALL BE REPLACED PROMPTLY.

4. SEDIMENT DEPOSITS SHOULD BE REMOVED AFTER EACH STORM EVENT. THEY MUST BE REMOVED WHEN

DEPOSITS REACH APPROXIMATELY ONE-HALF THE HEIGHT OF THE BARRIER.

5. ANY SEDIMENT DEPOSITS REMAINING IN PLACE AFTER THE SILT FENCE IS NO LONGER REQUIRED SHALL BE

DRESSED TO CONFORM WITH THE EXISTING GRADE, PREPARED AND SEEDED.

STORM DRAIN INLET PROTECTION (STD. & SPEC. 3.07, VESCH)

1. THE STRUCTURE SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS NEEDED.

2. SEDIMENT SHALL BE REMOVED AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT

HAS ACCUMULATED TO ONE HALF THE DESIGN DEPTH OF THE TRAP. REMOVED SEDIMENT SHALL BE DEPOSITED

IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE.

3. STRUCTURES SHALL BE REMOVED AND THE AREA STABILIZED WHEN THE REMAINING DRAINAGE AREA HAS

BEEN PROPERLY STABILIZED.

CULVERT INLET PROTECTION (STD. & SPEC. 3.08, VESCH)

1. THE STRUCTURE SHALL BE INSPECTED AFTER EACH RAIN AND REPAIRS MADE AS NEEDED.

2. AGGREGATE SHALL BE REPLACED OR CLEANED WHEN INSPECTION REVEALS THAT CLOGGED VOIDS ARE

CAUSING PONDING PROBLEMS WHICH INTERFERE WITH ON-SITE CONSTRUCTION.

3. SEDIMENT SHALL BE REMOVED AND THE IMPOUNDMENT RESTORED TO ITS ORIGINAL DIMENSIONS WHEN

SEDIMENT HAS ACCUMULATED TO ONE-HALF THE DESIGN DEPTH. REMOVED SEDIMENT SHALL BE DEPOSITED IN

A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE AND CAUSE SEDIMENTATION PROBLEMS.

4. TEMPORARY STRUCTURES SHALL BE REMOVED WHEN THEY HAVE SERVED THEIR USEFUL PURPOSE, BUT NOT

BEFORE THE UPSLOPE AREA HAS BEEN PERMANENTLY STABILIZED.

THE MEASURE SHALL BE INSPECTED AFTER EVERY STORM AND REPAIRS MADE TO THE DIKE, FLOW CHANNEL, OUTLET OR SEDIMENT TRAPPING FACILITY, AS NECESSARY. ONCE EVERY TWO WEEKS, WHETHER A STORM

EVENT HAS OCCURRED OR NOT, THE MEASURE SHALL BE INSPECTED AND REPAIRS MADE IF NEEDED.

DAMAGES CAUSED BY CONSTRUCTION TRAFFIC OR OTHER ACTIVITY MUST BE REPAIRED BEFORE THE END

OF EACH WORKING DAY.

OUTLET PROTECTION (STD. & SPEC. 3.18, VESCH)

1. SEDIMENT SHALL BE REMOVED AND THE TRAP RESTORED TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT

HAS ACCUMULATED TO ONE HALF THE DESIGN VOLUME OF THE WET STORAGE. SEDIMENT REMOVAL FROM

THE BASIN SHALL BE DEPOSITED IN A SUITABLE AREA AND IN SUCH A MANNER THAT IT WILL NOT ERODE

AND CAUSE SEDIMENTATION PROBLEMS.

2. FILTER STONE SHALL BE REGULARLY CHECKED TO ENSURE THAT FILTRATION PERFORMANCE IS MAINTAINED.

STONE CHOKED WITH SEDIMENT SHALL BE REMOVED AND CLEANED OR REPLACED.

3. THE STRUCTURE SHOULD BE CHECKED REGULARLY TO ENSURE THAT IT IS STRUCTURALLY SOUND AND HAS

NOT BEEN DAMAGED BY EROSION OR CONSTRUCTION EQUIPMENT. THE HEIGHT OF THE STONE OUTLET

SHOULD BE CHECKED TO ENSURE THAT ITS CENTER IS AT LEAST 1FOOT BELOW THE TOP OF THE

EMBANKMENT.

THE MEASURE SHALL BE INSPECTED AFTER EVERY RAINFALL AND REPAIRS MADE, IF REQUIRED. LEVEL

SPREADER LIP MUST REMAIN AT 0% SLOPE TO ALLOW PROPER FUNCTION OF MEASURE. THE CONTRACTOR

SHOULD AVOID THE PLACEMENT OF ANY MATERIAL ON AND PREVENT CONSTRUCTION TRAFFIC ACROSS THE

STRUCTURE. IF THE MEASURE IS DAMAGED BY CONSTRUCTION TRAFFIC, IT SHALL BE REPAIRED

IMMEDIATELY.

LEVEL SPREADER (STD. & SPEC. 3.21, VESCH)

ONCE A OUTLET PROTECTION INSTALLATION HAS BEEN COMPLETED, IT SHOULD REQUIRE VERY LITTLE

MAINTENANCE. IT SHOULD, HOWEVER, BE INSPECTED PERIODICALLY TO DETERMINE IF HIGH FLOWS HAVE

CAUSED SCOUR BENEATH THE RIPRAP OR FILTER FABRIC OR DISLODGED ANY OF THE STONE. CARE MUST BE

TAKEN TO PROPERLY CONTROL SEDIMENT-LADEN CONSTRUCTION RUNOFF WHICH MAY DRAIN TO THE POINT

OF THE NEW INSTALLATION. IF REPAIRS ARE NEEDED, THEY SHOULD BE ACCOMPLISHED IMMEDIATELY.

TEMPORARY STONE CONSTRUCTION ENTRANCE (STD. & SPEC. 3.02, VESCH)

E R

O S

I O

I M

E N

O N

T R

O L

N O

T E

A I L

PERSON RESPONSIBLE FOR MAINTENANCE INSPECTION AND MAINTENANCE OF BMPS:

MS. PANDORA HOWELL

CHIEF, PORTFOLIO OPTIMIZATION ELEMENT

pandora.m.howell.civ@mail.mil

(MILITARY INSTALLATION UNNAMED AT THE REQUEST OF THE PROJECT SPONSOR)

NOT TO SCALE

INSPECTION AND MAINTENANCE OF TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES

S F

L O

I T

I N

L O

US Army Corps of Engineers ®

SHEET OF

SHEET ID

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

P R

O J E

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

CG519

F C

D P

TRANSVERSE SLOPES

TEMPORARY DIVERSION DIKE/SAND BAGS AS NEEDED

ON TRANSVERSE SLOPES

SILT FENCE WITH WIRE SUPPORT

DOWN SLOPE OF TRANSVERSE SLOPES

TEMPORARY DIVERSION DIKE/SAND BAGS

AT UPPER END OF TRENCH EXCAVATION

SILT FENCE WITH WIRE SUPPORT

AT LOWER END OF TRENCH EXCAVATION

NOTES:

1. THE PROJECT WILL BE PHASED SO THAT NO MORE THAN 500

FEET OF TRENCH IS OPEN AT ANY GIVEN TIME.

2. WORK WILL PROGRESS FROM HIGHER ELEVATIONS TO

LOWER ELEVATIONS WHERE EVER PRACTICAL.

3. EROSION CONTROL SYSTEMS WILL BE MOVING AND

ADAPTING IN SIZE AS THE PROJECT PROGRESSES.

4. SILT FENCE WITH WIRE SUPPORT AND TEMPORARY

DIVERSION DIKE WILL BE UTILIZED IN AREAS WHERE

GROUND COVER WILL BE DISTURBED.

5. CONSTRUCTION ZONE FENCING WITHIN 50' OF RUNWAYS OR

TAXIWAYS IS TO BE CONSTRUCTED OF LOW PROFILE

BARRIERS WITH AMBER LIGHTS AT NIGHT, BARRIERS TO BE

SPACED 20' ON CENTER.

TEMPORARY DIVERSION DIKE/ SAND BAGS

SILT FENCE WITH WIRE SUPPORT

TRENCH LINE

E R

O S

I O

I M

E N

O N

T R

O L

N O

T E

A I L

NOT TO SCALE

TYPICAL BMP LAYOUT

130+00

111+00

126+00

125+00

124+00

104+00

106+00

129+00

128+00

127+00

101+00

102+00

103+00

122+00

123+00

120+00

121+00

119+00

117+00

118+00

116+00

115+00

114+00

113+00

112+00

110+00

109+00

108+00

107+00

105+00

794+00

795+00

796+00

797+00

798+00

799+00

800+00

801+00

802+00

803+00

804+00

805+00

806+00

807+00

809+00

810+00

811+00

812+00

18+00

20+00

21+00

22+00

23+00

24+00

25+00

26+00

27+00

28+00

29+00

30+00

31+00

32+00

33+00

34+00

35+00

25+00

XXX

794+00

795+00

796+00

797+00

798+00

799+00

800+00

801+00

802+00

803+00

804+00

805+00

806+00

807+00

808+00

809+00

810+00

811+00

812+00

813+00

814+00

X X

A=11.75 ACRE

A=2.15 ACRE

A=5.05 ACRE

SF SF SF

S F

7 9

S F

BEGINING OF

GABION WALL

BEGINING OF

GABION WALL

BEGINING OF

GABION WALL

END OF

GABION WALL

END OF

GABION WALL

END OF

GABION WALL

SILT FENCE

FOR PERIMETER CONTROL

SILT FENCE

4' OFFSET FROM

GABION WALL

TEMPORARY SEDIMENT TRAP TO TREAT RUNOFF

FROM 6 ACRE APRON AREA PENDING VDEQ APPROVAL.

IT WILL BE CONVERTED TO PERMANENT

DETENTION/ SAND FILTER FACILITY ONCE THE CONSTRUCTION

IS COMPLETED AND THE SITE IS STABILIZED

NOTES:

1. DRAINAGE AREA DELINEATION IS BASED ON EXISTING GROUND CONTOURS. THIS

MEASURE OF ESC WILL NOT BE LIMITED BY MAXIMUM CONTRIBUTING DRAINAGE AREA

2. SEE SHEET CG521 FOR GABION WALL SEDIMENT BASIN CONSTRUCTION

SEQUENCE NOTES

EARTH BERM TO CONTAIN

LARGER STORM EVENT

WITHIN THE PROPOSED

GABION WALL SEDIMENT BASIN (TYP.)

SILT FENCE

4' OFFSET FROM

GABION WALL

EARTH BERM TO CONTAIN

LARGER STORM EVENT

WITHIN THE PROPOSED

GABION WALL SEDIMENT BASIN (TYP.)

EARTH BERM TO CONTAIN

LARGER STORM EVENT

WITHIN THE PROPOSED

GABION WALL SEDIMENT

BASIN (TYP.)

CG520

E R

O S

I O

I M

E N

O N

T R

O L

W G

N O

T E

A I L

SCALE: 1" = 100'

ALTERNATIVE EROSION AND SEDIMENT CONTROL CONCEPT PLAN WITH GABION WALL SEDIMENT BASIN

CG521

US Army Corps of Engineers ®

SHEET OF

SHEET ID

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

P R

O J E

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

AutoCAD SHX Text

GABION WALL

FILTER FABRIC

GABION BLOCK WALL,

FOR DETAILS SEE SHEET SB512

PROPOSED

FINISHED

GRADE

I N

1' - 0"

11' - 0"

3' - 0" 3' - 0" 3' - 0"

WALL B AND BACK

FACE OF WALL

CONCRETE FOUNDATION

AND LEVELING PAD

4' - 0"

EXISTING

GROUND

LARGE EVENT

OVERFLOW

ADJACENT GROUND TO

BE LEVELED AS

NECESSARY FOR SHEET

FLOW, AND STABILIZED

WITH SEEDING, SOD, OR

TREATED WITH TRM.

OUTER PERIMETER OF

DISTURBED AREA TO BE

LINED WITH SILT FENCE

WITH WIRE SUPPORT

UNTIL DISTURBED

SURFACE IS STABILIZED.

NOT TO SCALE

SILT FENCE WITH WIRE SUPPORT

SILT FENCE

WITH WIRE

SUPPORT

PROPOSED

LINEAR SAND

FILTER

SEDIMENT

STORAGE

2 FEET WIDE AND 2.5 FEET DEEP

TRENCH FOR SEDIMENT STORAGE

WITH 2:1 SIDE SLOPE

GABION WALL

SILT FENCE

FINISHED GRADE

EXISTING GROUND

GABION WALL

SILT FENCE

SEDIMENT STORAGE

US Army Corps of Engineers ®

SHEET OF

SHEET ID

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

P R

O J E

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

CG521

W G

NOTES:

ALTERNATIVE EROSION AND SEDIMENT CONTROL CONCEPT PLAN OUTLINE (PENDING

ACCEPTANCE OF VARIANCE REQUEST THAT A GABION WALL SEDIMENT BASIN BE

ACCEPTED AS AN ESC CONTROL MEASURE)

- GABION WALL ALONG DOWNSTREAM PERIMETER OF DRAINAGE AREA WILL BE

INSTALLED PRIOR TO STARTING FILL PLACEMENT.

- STORMWATER MAY HAVE TO BE PUMPED TO A TEMPORARY SEDIMENT TRAP

DURING EXCAVATION OF FOUNDATION TRENCH FOR GABION WALL (LEVELING PAD).

- EXTERIOR AREAS IMMEDIATELY ADJACENT TO GABION WALLS MAY NEED TO BE

REGRADED TO ENHANCE SHEET FLOW CONDITIONS. REGRADED AREAS WILL HAVE

VEGETATION REESTABLISHED AS QUICKLY AS POSSIBLE, AND/OR WILL BE TREATED

WITH TRM. SILT FENCE WITH WIRE SUPPORT WILL BE UTILIZED AT THE OUTSIDE

PERIMETER OF THE GABION WALL DURING CONSTRUCTION.

- A TRENCH WITH 2 FEET WIDE BOTTOM, 2.5 DEEP AND 2:1 SIDE SLOPE WILL BE

EXCAVATED ALONG THE GABION WALL TO DETAIN RUNOFF AND ALLOW THE

SEDIMENT TO SETTLE OUT. ACCUMULATED SEDIMENT SHALL BE REMOVED WHEN IT

REACHES 1/2 THE TRENCH HEIGHT.

- SILT FENCE WITH WIRE SUPPORT WILL BE INSTALLED 4 FEET FROM THE BACK OF

THE GABION WALL TO FILTER FLOWS, REMOVE ADDITIONAL SEDIMENT AND KEEP

GABIONS FROM CLOGGING.

- GABION WALL WITH SILT FENCE WITH WIRE SUPPORT WILL MAXIMIZE THE SEDIMENT

HOLDING CAPACITY AND ALLOW RUNOFF TO PASS THROUGH THE WALL WITH

MINIMAL CHANCE OF FAILURE DURING LARGER STORM EVENTS. LARGER EVENTS

WILL FLOW OVER THE SILT FENCE WITH WIRE SUPPORT, THROUGH THE GABION

WALL AND BE RELEASED AS SHEET FLOW.

- PRIOR TO BACKFILLING ADJACENT TO GABION WALLS, SILT FENCE WITH WIRE

SUPPORT WILL BE REMOVED AND REPLACED WITH A PERMANENT GEOTEXTILE

FABRIC EXTENDING THE ENTIRE HEIGHT OF THE BACK OF WALL.

- EARTH BERMS (2.5 HIGH) AT BOTH ENDS OF THE GABION WALL WILL BE

CONSTRUCTED TO CONTAIN 25-YR FLOOD. STORMWATER WILL SEEP THROUGH

THE GABION WALL AND WILL BE RELEASED SLOWLY TO THE ADJACENT AREA AS

SHEET FLOW.

- THE EARTH BERM SHALL BE INSPECTED AFTER EVERY STORM EVENT AND

REPAIRED IMMEDIATELY IF DAMAGED. WORK SHALL BE STOPPED UNTIL THE BERMS

ARE RESTORED.

SECTION A-A

HORIZONTAL SCALE:1"= 50'

VERTICAL SCALE: 1"= 10'

E R

O S

I O

I M

E N

O N

T R

O L

N O

T E

A I L

AS NOTED

GABION WALL SEDIMENT BASIN

AutoCAD SHX Text

AutoCAD SHX Text -5

AutoCAD SHX Text -10

AutoCAD SHX Text -15

AutoCAD SHX Text -20

AutoCAD SHX Text -25

AutoCAD SHX Text

AutoCAD SHX Text -5

AutoCAD SHX Text -10

AutoCAD SHX Text -15

AutoCAD SHX Text -20

AutoCAD SHX Text -25

AutoCAD SHX Text 0+00

AutoCAD SHX Text 1+00

AutoCAD SHX Text 2+00

AutoCAD SHX Text 3+00

AutoCAD SHX Text 4+00

AutoCAD SHX Text 5+00

AutoCAD SHX Text 6+00

AutoCAD SHX Text 7+00

AutoCAD SHX Text 8+00

AutoCAD SHX Text 9+00

AutoCAD SHX Text

SHEET OF

SHEET ID

O R

N G

I N

E E

R S

D R

A W

D E

S I G

N E

S U

B M

I T

T E

S I Z

C H

E C

K E

A N

S I

F I L

A M

I S

S U

A T

F I L

U M

B E

1 2 3 4 5

R T

U B

M I T

T A

P R

O J E

C O

N T

R A

M A

R K

D E

S C

R I P

T I O

N D

A T

PHASE 1

A M

A N

A M

A N

H A

E A

V E

A V

I A

T I O

O M

P L

E X

V O

L U

I T

O N

S T

R U

C T

I O

N O

R F

O L

I S

T R

I C

N O

R F

O L

PROPERTY OF UNITED STATES GOVERNMENT, FOR OFFICIAL USE ONLY (FOUO). COPYING, DISSEMINATION, AND DISTRIBUTION TO UNAUTHORIZED INDIVIDUALS PROHIBITED.

CG601

D R

A I N

A G

T R

U C

T U

E D

U L

W G

DRAINAGE SCHEDULE

STRUCTURE

NO.

CB-3B

CB-1A

CB-1B

CB-3A

CB-4B

CB-5A

CB-5B

CB-7A

CB-7B

CB-6A

CB-6B

CB-8A

CB-8B

CB-4A

CB-2B

CB-2A

DS-01

MH-01

NORTHING

3576635.60

3576745.05

3576735.10

3576645.55

3576508.49

3576499.92

3576489.97

3576400.42

3576390.47

3576329.99

3576320.04

3576270.29

3576260.33

3576518.44

3576608.00

3576617.95

3576178.24

3576155.92

EASTING

12033365.45

12033448.67

12033441.11

12033373.02

12033532.62

12033771.07

12033763.50

12033695.41

12033687.85

12033911.95

12033904.39

12033866.56

12033858.99

12033540.18

12033608.28

12033615.84

12033987.60

12034016.77

STRUCTURE

LENGTH/DIA.

(FT)

8.00

7.34

4.00

STRUCTURE

WIDTH

(FT)

5.34

TOP

ELEVATION

(FT)

14.06

12.90

11.70

PIPE DIA

(IN)

INVERT

(FT)

9.97

9.54

9.97

9.54

9.97

8.15

9.97

9.69

9.97

7.42

9.54

9.97

8.83

9.97

6.70

6.50

PIPE DIA

OUT

(IN)

INVERT

OUT

(FT)

10.00

9.87

9.44

10.00

9.87

8.05

10.00

9.87

7.32

10.00

8.73

9.87

10.00

6.40

OWS 3576182.24 12034013.53 47.25 17.50 13.30 15 6.95 24 6.45

ES-01 3576052.09 12034110.44 6.15 5.00 8.70 30 6.00

*CB-11 3576856.50 12033049.03 4.17 4.17 13.50

15 9.25

*CB-12 3576810.46 12033014.06 4.17 4.17 13.34 15 9.90

*CB-13 3576913.31 12033092.22 4.17 4.17 13.50

15 8.55

18 5.40

EP-01 3576996.42 12033082.53

CB-18 3576584.82 12033030.63 4.17 4.17 13.00 18 9.07

EP-02 3576511.93 12032975.19

CB-19 3576369.77 12033267.20 4.17 4.17 13.00 18 8.79

EP-03 3576296.59 12033211.57

CB-20 3576117.79 12033598.61 4.17 4.17 13.00 18 8.13

EP-04 3576044.60 12033542.98

RS-01 3575973.30 12034203.30 5.33 5.33 6.80 24 2.80

ES-02 3575975.39 12034243.75 6.08 4.00 4.60 24 2.60

30 6.60

15 7.00

24 6.40

MH-02 3576765.24 12033298.21

15 7.9015 8.10

14.86

4.00 -

CB-14 3576719.04 12033271.65 15 8.70

CB-15 3576672.97 12033236.60 4.17 4.17 14.50 15 9.30

4.17 4.17 14.50

15 8.60

15 5.50

15 9.35

STORMDRAIN PIPE

FROM STRUCTURE NO.

TYPE

LENGTH

(FT)

TO STRUCTURE NO.

DIA./SIZE

(IN)

PIPE ID.

P-06

P-01

P-02

P-05

P-08

P-09

P-10

P-13

P-14

P-11

P-12

P-15

P-16

P-07

P-04

P-03

P-17

P-18

P-21

P-22

P-23

P-24

P-25

P-26

P-41

P-42

P-43

CB-2B

CB-1A

CB-1B

CB-2A

CB-4A

CB-5A

CB-5B

CB-6A

CB-6B

CB-7B

CB-7A

CB-8B

CB-8A

CB-4B

CB-3A

CB-3B

DS-01

MH-01

CB-12

CB-11

CB-15

CB-14

MH-02

CB-13

CB-18

CB-19

CB-20

CB-4A

CB-1B

CB-3A

CB-2B

CB-7A

CB-5B

CB-7A

CB-6B

CB-8A

CB-7A

CB-8A

DS-01

CB-4A

CB-3A

MH-01

ES-01

CB-11

CB-13

CB-14

MH-02

CB-13

EP-01

EP-02

EP-03

EP-04

42 x 27

RCP, CLASS V

HERCP, CLASS IV

RCP, CLASS IV

SLOPE

(FT/FT)

FULL FLOW

CAPACITY

(FT)

0.006 8.14

0.003 5.89

0.006 8.14

12.43

8.14

5.89

0.003

0.006

0.003

0.006 8.14

22.84

0.003

8.14 0.006

5.890.003

0.006 8.14

22.62

0.003

0.006 8.14

6.01

0.003

0.006 8.14

26.83

0.003

0.004

22.91

0.003

29.88

6.46

0.010

6.51

0.010

6.69

0.011

6.46

0.010

6.32

0.097

0.005 7.62

0.005 7.47

DETAIL

SHEETS

APRON INLET

DETAIL

SHEET CP501

SHEET CG402

SHEET CG504

SHEET CG403

SHEET CG501

SHEET CG404

SHEET CG501

SHEET CP514

END OF 18" RCP AT THE BACK OF GABION WALL AT ELEVATION 7.67

END OF 18" RCP AT THE BACK OF GABION WALL AT ELEVATION 8.33

END OF 18" RCP AT THE BACK OF GABION WALL AT ELEVATION 8.61

END OF 18" RCP AT THE BACK OF GABION WALL AT ELEVATION 5.00

SHEET CG503

*NOTE:

RIMS OF CATCH BASIN CB-11, CB-12 AND CB-13 WILL BE BELOW PROPOSED GRADE AND COVERED BY SOLID LID AT THE

END OF PHASE 1 TO PREVENT RUNOFF FROM ENTERING DURING PHASE 2 CONSTRUCTION. AREA AROUND THESE

CATCH BASINS WILL BE RE-GRADED TO OPEN UP CATCH BASIN TOPS BY OTHERS ONCE THE BUILDING IS BUILT.

Sheets and Views

CG516 EROSION CONTROL NOTES AND DETAILS

CG517 EROSION CONTROL NOTES AND DETAILS

CG518 EROSION CONTROL NOTES AND DETAILS

CG519 EROSION CONTROL NOTES AND DETAILS

CG520 EROSION CONTROL NOTES AND DETAILS

CG521 EROSION CONTROL NOTES AND DETAILS

CG601 DRAINAGE STRUCTURE SCHEDULE

File details come from the government source that posted it.