W91236-16-R-0004_Attachment_J-02_Facility_Description_and_Building_Inventory.pdf

1 February 2016

ATTACHMENT 2

Facility Descriptions and Building Inventory

1. Albemarle and Chesapeake Canal (ACC)

1.1 North Landing Bridge

1.1.1 Type-of-Bridge: This is a plate girder, twin symmetrical swing span structure that crosses at a 75-degree angle with the centerline of the canal. Both spans are arranged to swing in a counter-clockwise direction to open, and clockwise direction to close. It has a 24-foot concrete surfaced roadway with sidewalks on each side two feet wide for pedestrians. Each section of the swing span is 120 feet long and can be operated together or separately. The clearance between the fender systems is 80 feet horizontally and is normally 6.5 feet vertically. The control house on the north east end of the bridge is arranged to give full view of the canal and highway from the operating panel.

1.1.2. Bridge Approaches: The approach to the bridge on the south side is protected by the southeast warning gate, south southeast warning gate, and traffic signal lights on the right hand half of the approach road 200 feet, 550 feet, and 600 feet, respectively, ahead of the south monolith. The approach to the bridge on the north side is protected by the northwest warning gate, north northwest gate, 570 feet, and 620 feet, respectively, ahead of the double safety gates at the north monolith. These gates are electrically operated, but can be operated manually in an emergency.

1.1.3. Lights-Navigation-and Safety: All safety gates and the fender system are provided with the necessary navigation and safety signal lights in accordance with Coast Guard regulations.

At the first warning gate is a traffic light and bell. This traffic light is composed of three signal lights, one GREEN, one AMBER, and one RED in a vertical row. Each safety gate arm also carries three flashing RED lights.

a. When the RED lights are showing to highway traffic it means STOP, the swing span(s) is OPEN. When the GREEN light is showing it means GO, ALL CLEAR.

b. On each wing of the fender system there are RED navigation warning lights. The swing span(s) carries a RED light in the center when closed. These lights go out and GREEN lights come on when the swing span(s) is fully open. When all lights show RED it means STOP, the bridge is closed. Vessels should not approach within the system until the bridge tender SIGNALS the swing span(s) is OPEN with one long blast followed by one short blast on the horn.

1.2. Great Bridge Locks

1.2.1 Location: The Great Bridge Lock connects the southern branch of the Elizabeth River with the Albemarle and Chesapeake Canal. The Elizabeth River (referred to in these instructions as "the River") is part of Norfolk Harbor, and the regular lunar tides and fall therein twice a day. Strong gales and hurricanes produce tides ranging from the normal high elevation of plus 2.7 feet MLW to Plus 9.0 MLW. The Albemarle and Chesapeake Canal (referred to in these instructions as "the canal") connects with the Sounds of North Carolina via North Landing River. The surface fluctuations in the sounds and the canal are referred to as wind tides and are caused by winds. The water in the canal accordingly rises and falls irregularly, according the direction and intensity of the winds. The factors produce two conditions of operating head, the water in the canal at times being higher than in the River and vice versa.

1.2.2. Lock-Description: The function of the lock is to prevent the inflow of salt water from the Southern Branch of the canal and other connecting fresh waters to the south. The lock is a "two-way lock" and accordingly requires two opposing sets of gates; one set to be used when the head is from the river, and the other set to be when the head is from the canal. Each set consists of two gates, making four gates in all. Each gate has two leaves, making eight leaves in all. The weight of each leaf is approximately 50 tons.

There are also four sets of valves, two sets in each monolith. Each set consists of two valves the two which are opposite each other. This makes eight valves in all. The gates are lettered A, B, C, and D. The two leaves of each gate are called the "north leaf" of that gate. The four sets of valves are numbered 1, 2, 3, and 4 as shown on the drawing; and the two valves in each set are called the "north valve" and the south valve" of that set. The number of each gate and of each valve is marked clearly on the gate or valve; on the operating machinery, and on the controls. The lock was under construction during the period May 1931 to June 1932. The Prime Contractors and costs of each were as follows:

Founder, Monoliths and Merritt, Chapman and New York, N.Y. $397,772.31 Lock Walls Scott Corp.

Lock Gates Berkley Machine Works Norfolk, Va. $59,393.58

Operating Machinery Foote Bros. Gear and Chicago, Ill $42,797,34 Machine Co. $499,964.23

1.2.3 Dimensions of Lock:

Chamber Length 600 feet Chamber Width 72 feet Depth over Miter Sill 16 feet Normal Lift 2.7 feet Depth of Chamber from Top of Monolith to Miter Sill 25 feet

1.2.4 Lighting - Navigation, Signal Illumination: At each end of the lock is a semaphore signal consisting of a green light and a red light. When the RED light is showing, it is a DANGER sign, and vessels must not approach. When the GREEN light is showing, it is a CLEAR signal, and vessels may enter lock chamber. Navigation lights are only provided on the wings of the fender system on the north or east side of the lock. The lock chamber is illuminated at night by 11 non-glaring lights, 500 watts each, thus providing ample illumination for night operation.

1.2.5. Operating Control Houses: Operation to close the "A" gate leaves at the east end of the locks is described. Operation for other leaf pairs, east and west ends are similar.

a. 480 volt power is made available to the east end through existing switching at the centrally located lock tender's office building. This switching scheme allows energization of the east or west-end feeders, but not both simultaneously.

b. Upon energization of the east-end feeder, the operator depresses the main power pushbutton on the control console to energize the motor control center (MCC) 480 volt bus.

c. The control console pushbuttons labeled "valves" will then be depressed to open or close valves adjusting the water level within the lock as required.

d. Upon completion of the water level adjustment, the operator will then select, via the gate select pushbutton, the "A" gate leaf pair. Never operate a gate until the water level on each side of the gate is at the same elevation.

e. The operator will then select "close" for both the north and south gate leaves via the gate direction selector switches and set the run/jog selector switch to "run".

f. Depressing gate "A" brake footswitch to release the electric brakes, the operator will depress both north and south gate start pushbuttons simultaneously. Both gate leaves will accelerate uniformly at a preadjusted acceleration rate to full speed. If adjustments are required to equalize the travel of the two leaves, console mounted speed control potentiometers may be adjusted during this phase of the operation.

g. When the gates are nearly in the closed position, the operator may slow the gate motion through adjustment of the speed potentiometers to bring the gates to a joined position smoothly, releasing the footbrake and operating the pushbuttons simultaneously as the gates meet. Alternately as the gates are nearly in the closed position, the operator may depress the gate stop pushbuttons, switch run/jog selector switches to jog, the depress the start pushbuttons to jog the gates at a preset slow speed into their closed position.

h. Re-opening the gates is a similar operation with open/close selector switch set to "open".

i. Should the limit switches prevent full opening or closure of the gates, pressing the limit defeat pushbutton will activate an adjustable short timed interval to temporarily bypass the limit switch function while gates are operated slowly to final position

1.2.6 Manual Operation: Should it become impossible to operate a gate or valve by electric power, the machinery can be operated by hand. The necessary wrenches and appliances for switching to hand operation are available at each of the control houses.

2. Dismal Swamp Canal (DSC)

2.1 Deep Creek and South Mills Water Control Structures

2.1.1. Both Water Control Structures are of identical construction, built in 1964 by Carpenter Construction Company for a sum of $256,183.00. They are reinforced concrete structures with supporting wood pilings and steel sheet-pile cut-off wall. Mounted on top of the concrete ogee section are 8 steel slide gates. Each gate is 6 feet wide and 4 feet high. Total width of spillway is 50 feet. A normal full canal level is a canal gauge reading of 1.0 foot Dismal Swamp Canal Datum. This water level shall be maintained in order to provide a maximum navigation depth for the vessels using the canal. The large drainage area served by the 22 miles of canal length may cause rapid rise in the canal level during rainy periods. The steel-slide gates must be manually opened and closed to keep the water level in the canal at 1.0 foot Dismal Swamp Canal Datum and to accommodate the water releases from Lake Drummond.

2.2 Deep Creek and South Mills Drawbridge

2.2.1. Type-of-Bridge: Both bridges are of identical construction, built in 1934 at a cost of $131,500.00. The single span through girder bascule type, two lane highway Bridges across the Dismal Swamp Canal carrying vehicle traffic on U. S. Route 17. The clearance between the fender systems is 55 feet horizontally and 4.5 feet vertically in the unopened position. The roadway is 20 feet wide with an open steel grate-type traffic deck. Traffic deck was replaced on both bridges in August 1979. A 3-foot wide wood deck walkway has been added on one side of each bridge opposite the bridge operator's control house.

2.2.2. Bridge Approaches: Single safety gates protect the approaches to the bridges, 30 feet from the bridge abutments. These gates are electrically operated but can be operated manually in an emergency. All traffic gates, the fender system and the draw span are provided with the required navigation and safety lights in accordance with current U. S. Coast Guard regulations. Red traffic signals on either side of the bridge are activated when it is desired to stop traffic to open the bridge.

2.2.3. Lights-Navigation-and Safety: Each safety gate arm carries four red flashing lights that operate when the gate is lowered. A green traffic signal on either side of the bridge is showing when the gates are raised and the bridge is ready for vehicular traffic. Red navigation warning lights show from each wing of the fender system on either side of the bridge. The pair of lights on the draw span shows RED when closed and GREEN when open to vessel traffic. No vessel should attempt to pass through the fender system until the bridge tender signals that the draw span is open.

2.3. Deep Creek and South Mills Lock

2.3.1. Location: The Dismal Swamp Canal, a 22 mile land cut, connects that part of the Intracoastal Waterway between the Southern Branch of the Elizabeth River with the Sounds of North Carolina via northerly end of the Pasquotank River, known as Route 2. The controlling depth at mean low water, Norfolk, Virginia, to Albemarle Sound, NC, is 6 feet. The Southern Branch of the Elizabeth River is a part of the Norfolk Harbor, and the regular lunar tides rise and fall twice daily with an average range of 2.8 feet. The only tides in the Sounds of North Carolina and the Pasquotank River are wind tides, which are caused by winds blowing over the Albemarle Sound and backing up or blowing out the water of Pasquotank River. Therefore, the rise and fall of the water in this area is very irregular, and is controlled by the direction and force of the wind. The elevation of the water in the Dismal Swamp Canal is maintained at 12 feet above the surface of connected Rivers. This height is controlled by the locks and two spillways, one at Deep Creek, Virginia and the other at South Mills, North Carolina. The South Mills lock connects with the Pasquotank River by a short land cut known as Turners Cut.

2.3.2. Lock Description: Both locks are of identical construction, built in 1941 by the Maxon Construction Company of Dayton, Ohio for a total cost of $671,800.00. They are a single lift lock with an approximate lift of 12 feet from the river end up to the canal. There are two sets of gates leaves mounted on pintles at each end of the lock chamber. The two leaves of each gate are called the east leaf and the west leaf of that gate. Each leaf of the lower or River gates weight 42,200 pounds. The weight of each leaf of the upper or Canal gate is 28,500 pounds.

There are two slide valves in each leaf which are mechanically operated by electric motors.

These slide valves are used to flood the lock and discharge water on the lower side of the lock.

2.3.3. Dimension of Locks:

Chamber Length 300 feet Chamber Width 52 feet Depth over Miter Sill 12 feet Normal Lift 12 feet

2.3.4. Electrical System: - The electrical system is divided into two main circuits, convenience outlets of 240 volts and lightening of 120/240 volts. The navigation lighting displayed on the locks is in accordance with Coast Guard regulations.

2.3.5. Water Control Structures: Contiguous with each lock, there is a concrete spillway to discharge excess water independently of the lock. Deep Creek and South Mills Water Control Structures each have 8 wicket gates which are operated manually.

2.3.6. Mooring Bitts: - There are 13 steel mooring bitts, of 6 inch extra strong pipe welded to the lock wall, on each side of the lock chamber. These mooring bitts are for use in securing vessels while they are in the lock chamber.

2.3.7. Lock Walls: The lock walls are of steel sheet piling construction, type z-32 piling, driven approximately 7 feet below the lock floor. The corrugated effect of the wall is relieved by inserting two 6" X 8" yellow pine timbers in each U-section formed by the junction of each pair of piling sheets. Referring to drawing DSC-LP-20/17 in the operations manual in the lock office it will be noticed that the fender timbers are supported in back of clip angles, welded to the lock wall, and on each side are spaced by means of wood blocks.

2.3.8. Water Supply: From Lake Drummond for lockage. Domestic water service supplied by city water service.

2.3.9. Signal Lights: At each end of the lock is a semaphore signal consisting of a green light and a red light. When RED light is showing, it is a DANGER sign and vessels must not approach. When the GREEN light is showing it is a CLEAR signal, and vessels may enter lock chamber.

2.3.10. Office and Control Houses: At each lock is located a small framed house heated and air conditioned used as an office for the employee on duty. At each end of the lock chamber is a small metal control house in which the controls are located to activate the lock gate and lock valves operating electrically for that end of the lock.

2.4. Lake Drummond Reservation and Water Control Structures

2.4.1. Lake Drummond Reservation and Water Control Structure is located 3 miles west of the Dismal Swamp Canal and old U. S. Highway 17 approximately 11 miles south of Deep Creek in the Great Dismal Swamp. The purpose of the Lake Drummond Water Control Structure is to control the release of water from Lake Drummond into the Dismal Swamp Canal to maintain the canal level for navigation. The level in Lake Drummond will be maintained at 5.3 feet Lake Drummond Datum unless directed by the Contracting Officer’s Representative. This Water Control Structure is an integral part of the canal system, replacing the water lost by the operation of the two locks. Each full lockage requires 1,400,000 gallons of water. The spillway is a gravity type concrete structure 42 feet wide with an ogee shape to the spillway section.

The regulation of the discharge is manually controlled by 10 steel gates 3 feet by 3 feet located across the face of the structure. The Water Control Structure is located across the feeder ditch which was constructed between Lake Drummond and the Dismal Swamp Canal and is located about one-half mile east of the lake. There is a frame house located just south of the water control structure; this is the office for the operator of the spillway and of the adjacent day use recreation area located at the reservation.

2.4.2. Water Control Structure: The operating machinery consists of ten hand-power hoisting devices of rack and gear design. A hand crank is attached to a gear which in turn operates a large gear intermeshed with a short shaft and smaller gear working against the rack section of the slide gate strut. The slide gates are pin connected with a clevis at the top of each gate to allow the gate to operate freely within the limits of the gate guides. The upper part of the strut carries a rack gear, the teeth of which are held against the hoisting gear by a steel guide. The control gates, called "wickets" are steel slide gates 3'10" X 3'0". These gates slide vertically by means of the strut and hand hoisting device against the upstream face of the concrete spillway.

There are ten steel screens, one in front of each gate on the upstream side of the spillway hanging on hooks. Their purpose is to prevent trash, drift and logs from jamming the gates.

An overhead manually operated hoist services these trash screens. This hoist is used to pull the screens for painting and servicing as well as for large drift removal. This is a duty of the spillway operator. The approaches to the spillway from the lake side are protected by steel bulkhead. The downstream side is protected by a straight 230-foot long steel sheet-pile wall with riprap on the bottom providing a 42-foot wide discharge channel. The purpose of the bulkhead is to prevent scour around the spillway and along the banks of the feeder ditch below the spillway. The operator at the spillway has the responsibility of controlling the water level in the lake as well as meeting the water requirements for navigation in the canal. These releases must be coordinated with the lock and spillway operators at Deep Creeks and South Mills.

3. AIWW Building Inventory

3.1. Great Bridge Reservation (ACC)

3.1.1. Building #1 Office Building, 1 story cinder block, 31'4" X 58'8" X 11'4" (1,838 sf), reinforced concrete with non-friable asbestos floor tiles cover with carpet on creosoted piles foundation, shingle roof, with old furnace room attached, 13'3" X 12'6" X 6'3" (166 sf)

3.1.2. Building #2. - Shop Building, 1 story frame construction 208'7" X 32' X 12'(6,675 sf), concrete foundation, corrugated galvanized iron siding and roof, 6" concrete floor, with attached storage shed, 44'7" X 10'2" X 9'(453 sf) and old boiler room, 15'9" X 10' X 8' (157sf).

3.1.3. Building #3 – “B” Warehouse, 1 story frame construction 160' X 32' X 16'(5,120 sf), concrete foundation, corrugated galvanized iron siding and roof, with stairway to loft storage area, 6" concrete floor.

3.1.4. Building #4, Auto Shop Building, 1 story frame construction 64' X 30' X 12' 4" (1,920 sf), corrugated galvanized iron siding and roof, 6" concrete floor, with attached restrooms14'6" X 12'3" X 6'9"(178 sf), concrete foundation.

3.1.5. Building #5, Union Hall, 1 story frame construction 34'2” X 20'3” X 9' (692 sf), wood foundation, corrugated galvanized iron siding, sheet metal roof, concrete floor, with additional 16' X 16' X 8'(256 sf), wood frame construction, screened-in siding sheet metal roof, concrete floor.

3.1.6. Building #6, Dry Storage, 1 story frame construction 14'2” X 12'2” X 9' (170 sf) concrete pile foundation, corrugated galvanized iron siding and roof, 6' concrete floor with attached storage room, 24' X 12' X 9' (288 sf).

3.1.7. Building #8, Generator Building and Electric Shop, 1 story frame 30' X 27'6" X 8'(825 sf) structure, metal siding and roof, 6" concrete floor.

3.1.8. Building #10, Vehicle Shed (18 bays), 1 story 181' X 24' X 10'4"(4,344 sf), concrete pier foundation, galvanized iron siding, aluminum roof, gravel floor, open front.

3.1.9. Building #11, Storage Building, 1 story frame construction 71' X 24" X 8"(1,704 sf), concrete foundation, wood siding, aluminum roof 6" concrete floor. Building also has a 10 foot by 12 foot cover for the fuel tank.

3.1.10. Building #12, Lumber Storage Building/Shed, building 1 story frame construction 51' X 24' X 10' (1,224 sf), open shed 23’ X 24’ x 10’ (552 sf), concrete pile foundation, wood siding aluminum roof, earth floor.

3.1.11. Building #13, Storage Building, 1 story frame construction 30'2" X 20' 2" X 8'(608 sf), concrete foundation corrugated galvanized iron siding and roof, 6" concrete floor.

3.1.12. Building #14, Dry Dock Storage Shed, 1 story frame construction 9' X 9' X 7'6"(81 sf), concrete foundation, vinyl siding, and shingles.

3.1.13. Building #15, Boat House, 30’ X 18’ (540 sf) wood frame, shingle roof.

3.2. Great Bridge Lock (ACC)

3.2.1. Building #1, Lock Operators Office, 1 story 23' X 33'(759 sf), CMU walls on concrete slab, built-up roof on steel joists, restrooms, ceramic tile, vinyl floor tile, synthetic exterior wall finish.

3.2.2. Buildings #2 (west end) and #3 (east end), 2 Lock Gate Control Houses, 1 story 16’ X 18’ (288 sf each) vinyl cover wood siding and shingle roof.

3.2.3. Building #4, Lawnmower Storage Building, 1 story framed construction, wood floor, shingle, vinyl siding, 8’ X 8’ (64 sf).

3.3. North Landing Bridge (ACC)

3.3.1. Building #1, Bridge Operator House, masonry construction, 2 story 13’ X 11’ (143 sf each floor)

3.3.2. Building #2, Storage Shed, 1 story framed construction, wood floor, shingle, wood siding 10’ X 10’ (100 sf).

3.4. Deep Creek Lock (DSC)

3.4.1. Building #1, Lock Operators Office, 1 room with restroom, wood construction, 27'7" X 18'3" X 9"(503 sf), brick foundation, vinyl siding, shingle roof, wood floor with non-friable asbestos floor tiles cover with carpet with attached lawnmower shed, 8’ X 8’ (64 sf), frame construction, vinyl siding, shingle roof, and concrete floor.

3.4.2. Building #2 (north end) and #3 (south end), Lock Gate Control Houses, pre-fabricated aluminum buildings, 11'10" X 8' X 7' (95 sf each).

3.5. Deep Creek Bridge (DSC)

3.5.1. Building #1, Bridge Operator House, frame construction, shingle roof and siding, concrete floor, 13’ X 26’ (338 sf)

3.6. South Mills Lock (DSC)

3.6.1. Building #1, Lock Operators Office, 1 room with restroom, wood construction, 27'7" X 18'3" X 9"(503 sf), brick foundation, vinyl siding, shingle roof, wood floor with non-friable asbestos floor tiles cover with carpet with attached lawnmower shed, 8’ X 8’ (64 sf), frame construction, vinyl siding, shingle roof, and concrete floor.

3.6.2. Buildings #2 (north end) and #3 (south end), Lock Gate Control Houses, pre-fabricated aluminum buildings, 11'10" X 8' X 7' (95 sf each).

3.7. South Mills Bridge (DSC)

3.7.1. Building #1, Bridge Operator House, frame construction, shingle roof and siding, concrete floor, 13’ X 26’ (338 sf)

3.8. Lake Drummond Reservation and Feeder Ditch (DSC)

3.8.1. Building #5, Storage House, wood construction 14'3" X 9'4" X 7'6" (133 sf), concrete foundation, wood siding, non-friable asbestos shingle roof, 6" concrete floor.

3.8.2. Building #7, Maintenance Storage Shed, 16’ X 16’ (256 sf), pressure treated wood, vinyl siding, and vinyl trim, shingle roof, adjacent to Building #8. Building also has a 10 foot by 12 foot cover for the generator.

3.8.3. Building #8, Office Building- 1 story, 3 rooms, 1 bath wood construction 27' X 26'10" X 8'(724 sf), brick foundation, wood siding, shingle roof, wooden floor, and screened porch.

3.8.4. Building #9, Comfort Station, frame construction, 16' X 8' X 7' (128 sf), concrete foundation and floor, non-friable asbestos shingle siding, shingle roof.

3.8.5. Building #10, Comfort Station, pre-manufactured restroom with 750 gallon holding tank concrete pad located on the north side of the reservation.

3.8.6. Building #11, Storage Shed, wood framed and vinyl siding, shingle roof, concrete floor. 9' X 9' (81 sf), frame construction, pressure treated wood with vinyl siding, shingle roof, and located at the mouth of the feeder ditch by Dismal Swamp Canal Trail.

3.8.7. Building #12, Picnic Shelter, 16' X 20'(320 sf), roof with concrete pad and screen wire siding.

3.8.8. Building #13, Picnic Shelter, 16’ X 20'(320 sf), roof with concrete pad and screen wire siding

3.8.9. Building #14, Boat House 20' X 10' (200 sf), located on the Feeder Ditch below the water control structures.

3.8.10. Building #15, Boat House, 20” X 12” (240 sf) frame construction, pressure treated wood with vinyl siding, shingle roof, and located at the mouth of the feeder ditch by Dismal Swamp Canal Trail. The area also has a large wood landing, a small pier with steps located just south of the feeder ditch, and a small pier with steps located on the west side of the canal.