Report for Seven-foot Knoll (Maryland) - 1909
| General |
| District: | 5th |
| Inspector: | Major W. E. Craighill, Light-House Engineer |
| Location: | Seven-Foot Knoll, Md., off the mouth of Patapsco River, about 1/4 mile NE'ly from Cutoff Channel, and about midway of its length. |
| Date of Report: | 05/05/1909 |
| Latitude: | 39° 09' 19" |
| Longitude: | 76° 24' 33" |
| Premises |
| Site: | Submarine |
| Date of Reservation: | |
| Date of Deed: | |
| Date of Permission: | |
| Date of Lease: | |
| Area of the Entire Site: | |
| Area Inclosed: | |
| Character of Soil: | |
| Distance of tower from Nearest High-Water Mark: | |
| Inclosures to Premises / Type of Fence: | |
| Wharf or Landing on Premises: | |
| Road to Land or Wharf Chararacter of and Distance: | |
| Means to Reach Light Station: | Boat |
| Distance to Nearest Road: | 6 miles, to railroad station |
| Distance to Post Office: | 6 miles |
| Distance to Village: | 6 miles |
| Facilities for Public Conveyance: | None |
| Facilities for Private Conveyance: | Small boat, 6 miles |
| Means Used for Support of Lantern: | Dwelling |
| Number of Separate Lights: | 1 |
| First Built or Established: | 1855 |
| Last Rebuilt, Repaired, or Renovated: | |
| Condition at This Date: | Good |
| Shape of Tower in Plan: | Screwpile, Substructure, octagonal; superstructure, circular. |
| Form of Tower: | Cylindrical |
| Height from Base to Ventilator Ball: | |
| Height of Focal Plane Above Mean High Water: | 42 feet |
| Background of Lighthouse as Seen from Sea: | Woods |
| Color of Tower: | Brown |
| Color of Tower/ How Produced: | Paint |
| Tower Connection: | |
| Object of Navigation: | Bay, general |
| Building Materials: | |
| General Description: | |
| Wall Thickness at Base: | |
| Wall Thickness at Parapet: | |
| Diameter at Base: | 40 feet |
| Diameter at Parapet: | 12 feet |
| Kind of Stairway and Steps: | Wood |
| Number of Landings: | 1 |
| Size of Glass: | 10" x 15" |
| Number of Windows and Size of Sash: | 6 - 2' 4" x 3' 4" & 5' 10" x 3' 2.5" |
| Number of Doors: | 16 |
| Kind of Foundation and Depth Below Surface: | Mud & sand, 35 feet |
| Character of Soil Surrounding the Lighthouse: | |
| Soil Susceptibility: | |
| Miscellaneous Remarks: | Circular dwelling on octagonel screwpile foundation, and supporting lantern with illuminating apparatur. |
| Lantern and Fixtures |
| Order of Lantern: | 4th |
| Shape of Lantern: | Cylindrical |
| Diameter to Glass: | 76.5 inches |
| Diameter in the Clear: | |
| Number of Sides: | |
| Type of Bars: | Helical |
| Thickness of Bars: | |
| Height Glazed: | 35 5/8" |
| Number of Plates in Height: | 1 |
| Number of Plates Each Side: | 1 |
| Thickness of Plates: | 3/8" |
| Size of Plates: | 12" x 29" x 37" |
| Number of Storm Panes: | |
| Unglazed Side of Lantern: | |
| What Bearings: | |
| Construction Material Lantern: | Iron |
| Construction Material Roof / Cowl: | Iron |
| Ventilator / Cowl: | Iron |
| Lightning Spindle: | Iron |
| Description of Lightning Rod: | Iron rod extending from ball of lantern |
| Balustrade: | Iron |
| Lantern Doors: | Iron, fitted with hinges to outside of lantern |
| Floor of Lantern: | Iron |
| Watchroom Doors: | Iron, fitted with hinges to floor of lantern |
| Parapet Diameter: | 6 feet |
| Ventilators |
| Location / Number: | Lower part of lantern |
| Ladders / Cleaning Arrangement: | One, wood |
| Curtain Hooks / Hanger: | Screwed |
| Watchroom |
| How is Watchroom Fitted: | Fitted with service table and shelves |
| How is Relief Called: | |
| Where is Call System Led: |
| Illuminating Apparatus |
| Kind of Apparatus: | |
| Intensity in Candles: | |
| Name of Maker: | L. Sautter Co. |
| Year Made: | Not given |
| Marks and Number: | None |
| Order of Apparatus: | 4th |
| Inside Diameter: | 19.5 inches |
| Light Characteristic: | Fixed white with red sector |
| Time of Revolution: | |
| Flash Interval: | |
| Duration of Flash: | |
| Arc of Each Fixed Part: | |
| Number of Panels: | 4 |
| Number of Flash Panels: | |
| Arc of Each: | |
| Number of Elements in Central Drum: | 5 |
| Number of Prisms Above Center Drum: | 5 |
| Number of Prisms Below Center Drum: | 3 |
| Does Apparatus Revolve?: | False |
| Is There a Revolving Belt?: | False |
| Revolving Panels: | |
| How Flash is Produced: | |
| Number of Vertical Elements Panel: | |
| Fixed Lens Covered: | |
| Pedestal: | Iron |
| Service Table: | Iron |
| Draft Tube Description: | None |
| Revolving Machinery: | |
| Standby and Description: | |
| Chariot Float or Balls: | |
| Chariot Description: | |
| Length of Drop Tube: | |
| Clock Weight: | |
| Length of Winding Time: | |
| Drive During Rewind: | |
| Machinery Protection: | |
| Regulated: | |
| Lens Protection: | |
| How Color is Produced: | Ruby glass |
| Red Sectors Description: | 133 degrees 30' true (SE 3/8 S) mag. & 334 degrees 30' true (N 7/8 W) mag. |
| Where Color Attached: | To lantern |
| Form of Colored Glass: | |
| Lamp Description: | 4th order, one wick |
| Type of Illuminant: | |
| Number of Spare Lamps: | 2 |
| Number of Spare Burners: | None |
| Candle Power: |
| Closets and Store Rooms |
| Tower Closet Use: | |
| Oil House Description: | Room on 1st floor, fitted with stand |
| Oil House Inside Dimension: | 30" x 84" |
| Oil House Construction Material: | Wood, covered with zinc |
| Oil House Capacity: | 50 5-gallon cans |
| Other (Describe): | Closets on first floor, fitted with shelves for general purposes. |
| Suitability: | Suited |
| Fog Signal General |
| Fog Signal Kind: | Custer Bell Machine |
| Time to Start: | 2 minutes |
| How Long Will Pressure Last: | |
| Manufacturer: | Not known |
| Year of Manufacture: | Not known |
| Characteristic: | A single blow every 12 seconds |
| Duplication: | None |
| Timing Device: | |
| If whistle, siren, or trumpet, Pressure at Which Blown: | |
| Height Above Water: | |
| Compass Direction: | |
| Location: | |
| Distance and Direction: | |
| Water Supply: | |
| Reached from Lighthouse: | |
| Description of Fog Signal Building: | |
| Pressure And Recording Gauge: |
| Bell Signal |
| Weight: | 1,000 lbs. |
| Metal: | Bell metal |
| Diameter: | 31" |
| Height: | 24.5" |
| Time: | 45 minutes |
| Manufacturer: | |
| Weights for Operation: |
| Dwelling |
| Location: | Tower and dwelling one structure |
| Coloring: | Brown |
| Construction Materials: | Iron lined with wood |
| Number of Rooms: | 5 |
| Number of Dwellings: | |
| Heating Plant: | |
| Number of Keepers: | 2 |
| Furnished Quarters: | |
| NOT Furnished Quarters: | |
| Outhouses: | |
| Outhouse Coloring: | |
| Paths and Walks: | |
| Area Inclosed: | |
| Area of Garden: | |
| Area Timber or Shrubbery: | |
| Cultivation Area Available: | |
| Area Cultivated: | |
| Character of Surroundings: | |
| Stove, Maker: | |
| Stove, Size: | |
| Sink, Maker: | |
| Sink, Size: | |
| Pump, Maker: | |
| Pump, Size: | |
| Lamps: |
| Water |
| How Procured: | From roof |
| Quality: | Good |
| Quantity: | Ample |
| Injury Possible: | Not liable |
| Purity Precaution: | Tanks cleaned when necessary |
| Tank Capacity: | 3 tanks, 200 gallons each, on first floor |
| Tank Material: | Iron |
| Distilling Apparatus: | False |
| Distilling Manufacturer: | |
| Well Description: | |
| Well Diameter: | |
| Well Lining: | |
| Pump or Bucket: | |
| What Power Used: | |
| Distance from Dwelling: |
| Healthfulness |
| General Opinion: | Good |
| Diseases: | Malaria |
| Prevalency: | Spring and fall |
| Local Causes: | No |
| Recommended Improvements: |