J-1503050-13(a5) CARD LID 2020_Amend 06 (Att 24).pdf

Low Impact Development Areas LAT LONG AREA (SF) QTY Location CRDR_SWM02 - bioretention 38.976579 -77.1929 2300 North Parking Lot CRDR_SWM03 - green roof 38.975987 -77.195105 5,000 Bldg 42 CRDR_SWM06 - dry swale 38.976556 -77.199461 1950 Bldg 18 CRDR_SWM07 - dry pond 38.97354 -77.199302 450 Bldg 18 CRDR_SWM08 - Sandfilter 38.976248 -77.199276 650 Bldg18 CRDR_SWM09 - wet pond 38.974456 -77.197812 10250 Bldg 60/68 CRDR_SWM10 - wet pond 38.97319 -77.196548 1250 Bldg 80 CRDR_SWM11 - vegetated swale 38.977465 -77.196419 2570 Bldg 80 CRDR_SMW12 - dry pond 38.973355 -77.182989 2500 South of Bldg 26 CRDR_SWM16 - bioretention 38.97512 -77.18631 600 Bldg P-110 East CRDR_SWM17 - bioretention 38.97512 -77.18661 450 Bldg P-110 South CRDR_SWM19 - microbioretention 38.974287 -77.192093 1100 Parade Ground, South of Bldg 3 CRDR_SWM22 - microbioretention 38.975712 -77.199294 550 Bldg 18 Trailers East CRDR_SWM23 - microbioretention 38.975778 -77.199482 550 Bldg 18 Trailers West Rain Barrells, 3 each 5 B198

30,170 5

North Swale Maintenance SF Zone 1 33,541 Zone 2 65,775 Zone 3 30,927 Zone 4 13,503

143,746

Grounds Maintenance Services throughout Naval District Washington J-1503050 - Grounds Maintenance Services Attachments - PWD Washington

J-1503050-11(a4) Grounds Inventories at the Washington Navy Yard (WNY)

CARDEROCK LID INVENTORY

Security grille at drainage ditch where it crosses Essex Road to the Clara Barton Pkwy Outfall S. of 4E Bldg. 31 drainage ditch at fence line Back gate ditch at the far NE corner of the base Security grille at drainage ditch adjacent to and west of Bldg 52 Security grille at drainage ditch in wooded area north of Bldg 18

Stormwater Outlets - Inlets Inventory

J-1503050-13(a5)

Outfall ID Latitude Longitude Receiving Water (HUC) Approximate Drainage Area (ac) Description of Outfall Description of Drainage Area

2 pipes (21 in. and

18 in. RCP)

MH; outgoing

36 in. RCP

CAR 003 38°58'31.32"N 77°11'58.47"W Tributary to Potomac River (HUC 020700081005) 5 36 in. clay pipe Rain leaders on the south and west side of Building 18. This outfall is also authorized to discharge Navy research basin water.

CAR 004 38°58'29.13"N 77°11'53.00"W Tributary to Potomac River (HUC 020700081005) 2 18 in. CMP

Rain leaders, floor drains and drop inlets from Buildings 12, 13, 68, and 157.

This outfall is also authorized to discharge water from non-contact cooling water. This outfall typically discharges because of groundwater infiltration and sump pumps.

CAR 005 38°58'32.77"N 77°11'50.94"W Tributary to Potomac River (HUC 020700081005) 4 12 in. CMP and swale Roads and parking lots a portion of Building 157and a sump pump in Building

187.

CAR 006 38°58'36.60"N 77°11'47.77'W Tributary to Potomac River (HUC 020700081005) 2 12 in. RCP Drop inlets around Building 40.

CAR 007 38°58'35.04"N 77°11'57.02"W Tributary to Potomac River (HUC 020700081005) 4 36 in. HDPE Rain leaders on the north and west side of Building 18.

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River 15 in. RCP pipe

(HUC 020700081005) at base of weir

Open drainage from detention pond

CAR 013 38°58'19.34"N 77°11'20.48"W Tributary to Potomac River (HUC 020700081005) 9 Open channel at fence line Various discharge points, swales, roads, and parking lots adjacent to Buildings

17, 21, 29, 31 L, 188, 189, and 193.

CAR 014 38°58'29.50"N 77°11'56.35"W Tributary to Potomac River (HUC 020700081005) 7 30 in. concrete Roads, parking lots and rain leaders from Buildings 11, 68, and 60. It includes a 5,676-square-foot stormwater retention pond.

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Outfall 016 38°58'37.97N 77°11'47.21"W Tributary to Potomac River (HUC 020700081005) 2.5 18 in. CMP Overflow from adjacent wet pond at Building 80 which provides treatment for the Building 80 roof drains and adjacent pavement.

Outfall 017 38°58'38.38"N 77°12'00.81"W Tributary to Potomac River (HUC 020700081005) 3 Open drainage Pavement and parking lots adjacent to the northwest side of Building 18.

Outfall 018 38°58'38.23"N 77°11'46.68"W Tributary to Potomac River (HUC 020700081005) 3 Open drainage Parking lots and roof drains from Buildings 52 and 152.

Open field and serves as conveyance for draining the 2,000,000-gallon water tank located in CAR008. This outfall is also authorized to discharge water from Navy research basins.

Outfall 015 38°58'27.73"N 77°11'13.14"W <0.5 12 in. RCP Witek Road, just west of the access road to Building 200.

CAR 010 38°58'28.06"N 77°11'00.59"W 4

Open fields, roads, parking lots and rain leaders from Buildings 4 (North), 9, 147, and 200. This outfall and the upstream manhole are typically surcharged by flow from the receiving stream.

CAR 011 38°58'23.72"N 77°10'57.22"W Tributary to Potomac River (HUC 020700081005) <1

CAR 009 38°58'21.84"N 77°11'16.50"W 1 10 in. clay Drop inlets around Building 21.

CAR 008 38°58'22.57"N 77°10'58.06"W 4 12 in. PVC Open fields, roads, parking lots and rain leaders from Buildings 4S and 4E.

This outfall is also authorized to discharge water from Navy research basins and non-contact cooling water.

CAR 002 38°58'19.92"N 77°11'30.59"W

Closed conduit which discharges to an offsite unnamed tributary to Potomac River (HUC 020700081005)

Open fields, roads, parking lots and rain leaders from numerous buildings. This outfall typically has flow due to groundwater inflows and is also authorized to discharge water from Navy research basins and non-contact cooling water.

Outfalls 025-028 drain into the 002 system.

Carderock Facility Outfalls

CAR 001 38°58'20.76"N 77°11'04.54"W Tributary to Potomac River (HUC 020700081005) 9 Open fields, roads, parking lots and rain leaders from Buildings 4 and 4E.

CARDEROCK OUTFALLS

Area (ac) Description of Outfall Description of Drainage Area

Outfall 019 38°58'39.15"N 77°11'54.70"W Tributary to Potomac River (HUC 020700081005) 1.5 24 in. CMP Culvert

A non-jurisdictional ditch system that drains paved road (Bill Morgan Road) and Building 83. This outfall typically has flow due to groundwater inflows. The 2015 sampling was performed at a 4-in. PVC line upstream of Bill Morgan Road as the only discharge to the outfall.

Outfall 020 38°58'37.97"N 77°11'53.52"W Tributary to Potomac River (HUC 020700081005) 0.5 Drainage swale Building 82 basement sump and adjacent overland flow.

Outfall 023 38°58'35.94"N 77°11'52.44"W Tributary to Potomac River (HUC 020700081005) N/A 4 in. PVC Sump pumps from Building 81. The remainder of CAR023 appears to drain overland to the stream.

Outfall 024 38°58'23.68"N 77°11'46.74"W Tributary to Potomac River (HUC 020700081005) 1 24 in. clay Open field and rain leaders from Building 60.

Outfall 025 38°58'23.20"N 77°11'40.20"W Tributary to Potomac River (HUC 020700081005) 1 Open drainage Overflow from adjacent bioretention area at Building 20, which provides treatment for the Building 20 roof drains and adjacent pavement.

Outfall 026 38°58'23.88"N 77°11'40.26"W Tributary to Potomac River (HUC 020700081005) <0.5 12 in. RCP Roads, parking lots and rain leaders from southeast end of Building 20.

2 in. PVC

(buried in bank)

Outfall 028 38°58'25.72"N 77°11'42.47"W Tributary to Potomac River (HUC 020700081005) 1 15 in. RCP Runoff from Forrestal Road and the east side of Building 60.

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Outfall 043 38°58'27.89"N 77°11’8.49'W <0.5 6 in. PVC Building 9 (North) and pavement and parking areas around it.

Outfall 042 38°58'27.89"N 77°11’8.27"W <0.5 4 in. HDPE Paved areas west of Building 9 (North).

Outfall 041 38°58'29.34"N 77°11'20.12"W 0.5 12 in. RCP Witek Road, northeast of Building 159.

Outfall 040 38°58'28.02N 77°11'14.66"W 1 12 in. RCP Building 28 and Witek Road in vicinity of intersection with Atlanta Road.

Outfall 039 38°58'27.86"N 77°11'14.01"W 2.5 18 in. RCP A portion of the north side of Building 4 and surrounding storage and pavement.

Outfall 038 38°58'32.22"N 77°11'31.21"W 5 24 in. RCP Tennis court and adjacent parking lots along Witek Road.

Outfall 037 38°58'27.86"N 77°11'10.98"W 0.5 12 in. RCP Witek Road, along the access road to Building 9.

Outfall 036 38°58'27.36"N 77°11'10.92"W N/A 3 in. Ductile Iron Uncertain.

Outfall 035 38°58'27.70"N 77°11'9.38"W <0.5 10 in. RCP Access road to Building 9.

Outfall 027 38°58'24.71"N 77°11'41.56"W Tributary to Potomac River (HUC 020700081005) <0.5 Roads, parking lots and rain leaders from northeast end of Building 20.

Area (ac) Description of Outfall Description of Drainage Area

Tributary to Rock Run and Potomac River Buried CMP to

(HUC 020700081005) open drainage

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

Tributary to Rock Run and Potomac River

(HUC 020700081005)

ac = acre

CMP = corrugated metal pipe

HDPE = high density polyethylene

in. = inch

RCP = reinforced concrete pipe

PVC = polyvinyl chloride

Outfall 053 38°58'29.136"N 77°11'0.96"W 1 8 in. PVC Underdrain and overflow from bioretention areas at Building 125.

Paved areas adjacent to Building 128.

Outfall 052 38°58'28.72"N 77°11'16.00"W 1 12 in. RCP Roof leaders of Buildings 24, 199, 148 and a portion of the parking area north of them.

Outfall 045 38°58'32.26"N 77°11’31.07"W 1 Pavement and parking areas of T-19, Buildings 116 and 100.

Outfall 050 38°58'32.37"N 77°11'17.26"W 0.5 6 in. Ductile Iron