(1113) Ogontz Bay is a shallow bight on the NW side of Big Bay de Noc between St. Vital Point on the W and Indian Point on the E. Between Indian Point and Stony Point, 3.5 miles E, Big Bay de Noc Shoal extends 6.6 miles S into the center of Big Bay de Noc. The bank has depths of 3 to 7 feet at the S end and is marked at the S end by a buoy.

(1114) Nahma, Mich., is a small village on the shore W of Stony Point and at the mouth of Sturgeon River. It contains the mills and docks of the American Playground Device Co. Three dilapidated docks extend about 450 feet into the bay, and E therefrom are the ruins of four other docks. There is a reported depth of about 12 feet between the docks, but they should be approached with extreme caution. The water is shoal on the W side of the W dock and on the E side of the E dock.

(1115) From Stony Point, the NE part of Big Bay de Noc extends NE for 3.8 miles to Porcupine Point, thence curves around through N to Valentine Point on the E side, thence extends SSW for 4.1 miles to Ansels Point. This part of the bay has central depths of 15 to 22 feet with gradual shoaling toward the shores. Garden Bay, on the S side of Ansels Point, has available depths of 8 to 12 feet and affords anchorage with protection from all but SW to NW winds. Between Garden Bluff, on the S side of Garden Bay, and Middle Bluff, white in color and 4 miles SSW, the shore is indented by a shallow bay. Snake Island is in the S end of the mouth of this bay, just N of Middle Bluff.

(1116) Snail Shell Harbor, a small cove just S of Middle Bluff, provides excellent protection for recreational craft. The entrance to the harbor is marked by a lighted bell buoy. In 1978, depths of 20 feet were reported in the entrance, with 10 feet along the W shore and 6 feet along the S shore. A Michigan State Waterways Commission dock with transient berths is in the cove. Fayette, Mich., is a town at the head of the cove.

(1117) Sand Bay, the broad bight just S of Snail Shell Harbor, has deep water within 0.3 mile of shore. Burnt Bluff, on the S side of Sand Bay, is deep-to, and this trend continues S for 3 miles to the W point of Sac Bay. A small private artificial small-craft basin is on the W side of Burnt Bluff. Transient berths, water, and electricity are available.

(1118) Sac Bay, a small indentation in the SW end of Garden Peninsula, provides anchorage with protection from all but SE to W winds.

(1119) Fairport, Mich., a small fishing settlement midway between Sac Bay and Point Detour, has several landings with depths of 5 to 6 feet at their outer ends. A sandy and stony flat connects the mainland shore at Fairport with the Summer Islands to the S. A narrow 6-foot channel leads across the flat, following close to the mainland shore. The channel is obstructed by a 1-foot spot, marked on the NW side by a buoy.

(1120) Point Detour (45°36.1′N., 86°36.7'W.), the S extremity of Garden Peninsula, is the N entrance point to Green Bay. The islands and passages S of the point were described previously.

(1121) Between Point Detour and Point aux Barques, 18 miles NE, the E shore of Garden Peninsula is broken by a series of bays and inlets opening to the E and S. Shoals extend about 0.8 mile S from Point Detour. A detached 16-foot shoal is 3.3 miles E of the first point N of Point Detour. From Point Detour to Portage Bay, 10 miles NE, the shore should be given a berth of 1 mile. Between Portage Bay and Parent Bay, 15 miles NE of Point Detour, rocks awash and shoals covered 1 to 6 feet extend as much as 2 miles offshore. Shoals extend over 1 mile SE from each side of the entrance to Parent Bay. Between the shoals, deep water extends to within 0.4 mile of the head of the bay. From Parent Bay E to Point

aux Barques, shoals and rocks awash extend 1 mile from the bluff shore. At Point aux Barques (45°48.0′N., 86°21.0′W.) a shoal extends SE about 1.5 miles. In August 1982, a rock covered 5 feet was reported at the outer end of the shoal in about 45°47′08′′N., 86°19′48′′W.

(1122) From Point aux Barques, the low sandy shore trends N and then NE for about 12 miles to Manistique Harbor. In this stretch, shoals extend about 0.5 to 1 mile offshore, except at Wiggins Point, 4 miles N of Point aux Barques. Wiggins Point Shoal, with prevailing depths of 2 to 13 feet and rocks awash, extends about 2 miles offshore around the point. A lighted bell buoy marks the outer edge of the shoal.

(1123) Manistique Harbor, serving the town of Manistique, Mich., is at the mouth of Manistique River on the N shore of Lake Michigan 73 miles W of the Straits of Mackinac. A stack 0.9 mile NNW of the river mouth and a silver tank 0.8 mile NNE of the river mouth are prominent.

(1124) Manistique Light (45°56.7'N., 86°14.8'W.), 50 feet above the water, is shown from a red tower on a concrete base on the outer end of the E breakwater; a fog signal and a radiobeacon are at the light.

(1125) Channels.-The dredged entrance channel leads NE from deep water in Lake Michigan between converging breakwaters through an outer basin to the mouth of the Manistique River. The W side of the river entrance is protected by a pier. The outer ends of the breakwaters and the pier are marked by lights. In JulyAugust 1990, the controlling depths were 17 feet (19 feet at midchannel) in the entrance channel, thence 12 feet (15 feet at midchannel) in the basin, thence 10 feet (11 feet at midchannel) to a point about 500 feet below the head of the project, thence 8 feet to the head of the project.

(1126) The channel and basin are not adapted for anchorage, and mooring to the breakwaters and pier is prohibited.

(1127) The current in the channel attains velocities up to 3 mph. (1128) Above the dredged channel, there are a number of abandoned wharves with channels between having depths of about 7 feet.

(1129) Caution.-Several shoals should be avoided by vessels approaching Manistique Harbor. A 23-foot spot is 3.1 miles S of Manistique Light. A rocky ledge, covered 18 feet, is 0.8 mile SSW of the light. Rock ledges, covered 8 to 17 feet, extend 0.4 mile S from the outer end of the E breakwater and 0.3 mile SW from the outer end of the W breakwater.

(1130) Small-craft facilities.-A small-craft basin developed by the town and the Michigan State Waterways Commission is on the E side of the river 0.3 mile above the mouth. Transient berths, gasoline, water, ice, electricity, launching ramps, and sewage pumpout facilities are available.

(1131) From Manistique Harbor E for 4.5 miles to Dutch Johns Point, shoals extend 0.3 to 1.2 miles offshore. A detached 16-foot spot is 2 miles SE of the point, and detached 19-foot spots are 1.7 and 2.3 miles S of the point. These shoals should be avoided when approaching Manistique Harbor.

(1132) Chart 14911.-About 2.5 miles E of Dutch Johns Point, the shoal border decreases to 0.3 mile wide for about 9.5 miles ESE to Seul Choix Point. Seul Choix Point Light (45°55.3′N., 85°54.7 W.), 80 feet above the water, is shown from a white conical tower connected to a red dwelling on Seul Choix Point.

(1133) A bay that opens between Seul Choix Point and Hughes Point, 4.5 miles NE, is protected from the N and W and has deep

water within 0.8 mile of shore. A detached shoal with a least depth of 9 feet is 0.9 mile S of Hughes Point.

(1134) Port Inland is a private harbor of the Inland Lime & Stone Co., built on the lake in front of the company's plant about 4 miles NE of Seul Choix Point.

(1135) The harbor basin is protected by a breakwater, marked at the outer end by a private light with a fog signal, that extends S and W from shore. The privately dredged entrance channel has depths of about 25 feet and is marked by a private 000° lighted range. A private 047° lighted range marks the channel through the harbor basin.

(1136) Limestone is shipped from a 900-foot wharf on the NW side of the basin. The wharf has a deck height of 9 feet and reported depths of 25 feet alongside. There is open storage for 200,000 tons of limestone.

(1137) From Hughes Point, the shore trends E for 7 miles to Scott Point and thence 2 miles to Point Patterson (45°58.1′N., 85°39.3 W.). This stretch is filled with shoals and rocks extending 0.5 to 1 mile offshore.

(1138) From Point Patterson, the shore extends NE for 11 miles, thence E for 3.5 miles to Millecoquins Point (46°05.2′N., 85°26.8'W.). NE of Point Patterson the shoal border increases to a width of 2.8 miles and thence decreases to about 0.4 mile in the bight W of Millecoquins Point. Numerous submerged net stakes are within about 5 miles of shore in this stretch. Cranberry Shoal, with rocks awash, is 1.7 miles offshore 5.7 miles NE of Point Patterson. A detached 11-foot shoal is 1.3 miles WSW of Millecoquins Point, and a rock awash is 0.3 mile offshore 1 mile W of the point.

(1139) Naubinway Island, about 0.8 mile S of Millecoquins Point and marked by a light, is a small island surrounded by rocks and shoals. A 1-foot spot is 0.6 mile E of the island, and a detached 14-foot shoal is 0.8 mile SW of the island. Naubinway Reef, a rocky ledge with a least depth of 4 feet, is 1.5 miles SE of Naubinway Island. A detached 14-foot spot is midway between the reef and island.

(1140) Potter Reef, with a least depth of 1 foot and marked on the NE side by a buoy, is 7.3 miles SSW of Millecoquins Point and 6.5 miles ENE of Point Patterson. Millecoquins Reefs is a group of detached 7- to 13-foot spots that extend over 2 miles NW and SE, about 5 miles S of Millecoquins Point. A buoy marks the W end of the reefs. A number of detached shoal spots are within 3.5 miles S of Millecoquins Reefs. The shoalest are a boulder covered 9 feet 1.4 miles SE, 12-foot spots 2.2 and 3 miles S, and a 14foot spot 1.3 miles SW. These reefs and shoals are out of the normal vessel routes and are unmarked.

(1141) Lansing Shoals, Fagan Reef, Simmons Reef, and other shoals farther S in the vicinity of Beaver Island are described earlier in the chapter.

(1142) Between Millecoquins Point and Biddle Point, 3.3 miles E, a small bay has general depths of 12 feet or more with shoals within 0.4 mile of shore. On the W side of the bay, 2- and 7-foot spots are 0.6 mile ENE and E of Millecoquins Point, respectively. (1143) Naubinway, Mich., is a village on the W side of the bay, just N of Millecoquins Point. A former lumber dock on the N side of the point has washed out except for a few piles. Good shelter for craft drawing up to 10 feet is behind the small point just NE of Millecoquins Point, but the approach is rendered dangerous by the shoals E of Millecoquins Point. A small-craft harbor developed by the Michigan State Waterways Commission on the NE side of Millecoquins Point is protected by a breakwater. Transient berths, water, electricity, and a launching ramp are available.

(1144) From Biddle Point E for 9 miles to Point Epoufette (46°02.8′N., 85°11.7'W.), the shore is irregular and rocks and shoals extend 3 miles offshore in the bight just E of Biddle Point decreasing to 1 mile offshore just W of Point Epoufette. Pelkie Reef, with a depth of 11 feet at the N end and a rock awash at the S end, is 1.7 miles offshore 2.7 miles SW of Point Epoufette. A detached boulder ledge, covered 6 feet, is 1.5 miles WSW of Pelkie Reef. A 14-foot spot is 3 miles W of Pelkie Reef. Detached 16and 17-foot spots are 1.1 miles SSW and 0.9 mile S of Point Epoufette, respectively.

(1145) Charts 14880, 14911, 14881.-From Point Epoufette, the shore bends SE for 17 miles to Point aux Chenes (45°55.5′N., 84°54.6'W.). The shoal border reaches an extent of 1.8 miles about 4 miles E of Point Epoufette, thence decreases to 0.2 mile wide 3 miles N of Point aux Chenes. At Point aux Chenes, shoals and boulders, covered less than 18 feet, reach 1.5 miles W and 2.5 miles NW.

(1146) About 4.5 miles SE of Point Epoufette, a privately dredged channel, with a controlling depth of 24 feet in 1978, leads from deep water in Lake Michigan E to a private harbor of Sand Products Corp.

(1147) Manitou Paymen Shoal, with depths of 1 to 10 feet and a dangerous rock awash at the center, is 4 miles offshore, 8 miles SE of Point Epoufette. A buoy marks the S side of the shoal. A boulder, covered 18 feet, is 0.9 mile SSE of the buoy.

(1148) Between Point aux Chenes and Gros Cap, 5.7 miles SE, the shore is indented by small bays with shallow depths and rocks, awash and submerged. A boulder ledge, with a least depth of 17 feet, is 2.2 miles S of Point aux Chenes. West Moran Bay, on the SE side of Gros Cap, affords protection for small craft from N to E winds.

(1149) St. Helena Island, 2 miles SW of Gros Cap, is marked by a light on the SE end. Shoals extend about 0.3 mile off the NW, SW, and SE sides of the island. A buoy marks the SE edge of the shoals. Approaching from the W, the island should be given a wide berth.

(1150) St. Helena Shoal, 2 miles W of St. Helena Island, is 1.3 miles long E and W and has a least depth of 4 feet. A buoy marks the SW side of the shoal. Do not attempt to round the NW end of St. Helena Island at night unless its appearance under Gros Cap and the position of St. Helena Shoal are well understood.

(1151) From West Moran Bay SE for 2.5 miles to Point La Barbe, shoals extend about 1 mile offshore. Point La Barbe is the SW point of Point St. Ignace, which forms the S side of the Straits of Mackinac. Green Island and several small islets are on the shoal bank off Point La Barbe.

(1152) Mackinac Bridge crosses the Straits of Mackinac between Point St. Ignace on the N and Mackinaw City on the S. The center span of the suspension bridge has a clearance of 148 feet at the center decreasing to 135 feet at each end. The approaches to the bridge are marked by lighted and unlighted buoys. A private fog signal is under the main bridge span on the channel line. A racon is at the center span of the bridge. (Mackinac Bridge is described more completely at the beginning of this chapter.)

(1153) Currents.-Currents in the Straits of Mackinac, particularly NE of Mackinac Bridge in the vicinity of the Graham Shoals, are often strong and irregular.

(1154) The Straits of Mackinac E of Mackinac Bridge are described in chapter 10.

(1)

Chart Datum, St. Mary's River.-Depths and vertical clearances given in this chapter are referred to the sloping surface of the river above the locks when Lake Superior is at Low Water Datum, elevation 601.1 feet (183.2 meters), and the gage above the U.S. locks reads 600.6 feet (183.1 meters), and below the locks when the gage below the U.S. locks reads 578.4 feet (176.3 meters) and Lake Huron is at Low Water Datum, 577.5 feet (176.0 meters). These elevations are above mean water level at Rimouski, Quebec, on International Great Lakes Datum 1985 (IGLD 1985). (See Chart Datum, Great Lakes System, indexed as such, chapter 1.)

(2) Charts 14882, 14883, 14884.–St. Marys River forms the outlet of Lake Superior, connecting it with Lake Huron. From Whitefish Bay at the SE corner of Lake Superior, the river flows in a general SE direction to empty into Lake Huron at Point De Tour, a distance of 63 to 75 miles depending on the route traveled. The river is bounded on the W side for its entire length by the E end of the upper peninsula of Michigan and on the E side by the Ontario mainland in the upper part and Drummond Island and St. Joseph Island in the lower part.

(3) De Tour Passage, at the mouth of the river, extends N from Lake Huron. The W side of the passage extends from Point De Tour to Gaffney Point, 4 miles N, and the E side extends from Barbed Point to Black Rock Point, 3 miles N.

(4) After passing through De Tour Passage, the river turns NW and widens. Between Black Rock Point and the S end of St. Joseph Island, the river extends across the mouth of Potagannissing Bay. From Old Fort St. Joe Point at the S end, the river extends along the W side of St. Joseph Island for about 19 miles to Stribling Point at the N end. About 3 miles NW of Old Fort St. Joe Point, the river narrows between Hay Point and Point aux Frenes. Munuscong Lake is the widening in the river between Point aux Frenes and the foot of Neebish Island, about 8 miles N. (5)

Neebish Island, about 8 miles long and 4 miles wide, is in midriver opposite the N end of St. Joseph Island. Narrow channels lead around either side of the island. Sugar Island, just N of Neebish Island, is about 15 miles long N and S and has a maximum width of about 8 miles at the N end. Lake George separates the E side of the island from the Ontario mainland, and Lake Nicolet, through which flows the main channel of the river, is W of the island. A narrow channel leads from the N end of Lake George around the N end of Sugar Island and joins with the channel that leads N from Lake Nicolet.

(6)

From the junction, the river extends 2 miles W between the cities of Sault Ste. Marie in Michigan and Ontario to St. Marys Falls and the canals and locks which overcome them. Above the locks, the river extends 5 miles SW to the narrows between Pointe aux Pins and Brush Point, thence W for 3 miles before turning NW around Pointe aux Chenes and extending about 5 miles to the head of the river in Whitefish Bay.

(7) Channels.-A series of dredged deep-draft channels lead through the St. Marys River to connect the deep water of Lake Huron with that of Lake Superior. A detailed description of the various channel reaches is given later in the chapter. These channels are well marked by lighted and unlighted buoys and lighted ranges.

(19) Note.-The depths given in this chapter for the improved dredged channels in the St. Marys River are the Federal project depths. The Corps of Engineers makes periodic bar sweeps through all the improved dredged reaches of the St. Marys River, and these channels are well maintained at the project depths. Any depths found to be less than the project depths are published in the Local Notice to Mariners. (20) Fluctuations of water level.-Each year the St. Marys River rises and falls about 1 foot as measured by the monthly mean levels. Since 1900, the difference between the highest and the lowest monthly mean levels above the locks has been about 4 feet and below the locks about 6 feet. From day to day, the level fluctuates somewhat due to changes of wind and barometric pressure; such fluctuations frequently amount to several inches and sometimes to 1 foot or more. In addition to these changes in level, barometric pressure changes occasionally cause a considerable oscillation to take place within a short period; such changes amounting to over 5 feet have been known to occur within 3 hours. As much of the present sailing route in the St. Marys River has been made navigable by dredging, the changes in level have a direct effect on the available depth.

(21)

Currents.-As the speed limits established for the St. Marys River in 33 CFR 161.880 and 161.886, chapter 2, refer to the speeds over the bottom, and as the currents in the river are variable, masters are cautioned to regulate the speed of their vessels by running on time from point to point instead of relying on the number of revolutions per minute of the propeller. (22) The swiftest currents in the navigable channels of the St. Marys River are found at Little Rapids cut (course 2), West Neebish Channel Light 29, Six Mile Point, and West Neebish Channel rock cut (course 6). The strength of the current depends largely upon the discharge of the river and the elevation of the water surface at the mouth of the river. The discharge of the river is now under control and is varied according to water-level requirements. When the water surface at the upper end of Lake Huron is high, because of E or S winds or because of barometric variations, the current velocity is temporarily checked. When the stage on Lake Superior is such that a large flow is being permitted, the current is strong and is further increased if the level of Lake Huron is low.

(23) The attention of masters is also directed to the fact that at times the current over the rapids at Sault Ste. Marie is slight, while a very strong set is often experienced when passing the inlets of both the Michigan and Ontario power canals, adjacent S and N of the locks at Sault Ste. Marie, respectively. This is especially true of the Ontario canal where vessel masters have encountered difficulty through attaching too much importance to the rapid's current and not enough to that of the power canal.

(24) It is well to note that E and S winds make high water below the locks and low water above the locks and that W and N winds have the opposite effect.

(26)

Little Rapids cut (course 2): 2.2 mph (2.0 knots), 1.6 mph (1.4 knots), and 1.4 mph (1.2 knots)

(27) West Neebish Channel Light 29: 1.8 mph (1.6 knots), 1.3 mph (1.1 knots), and 1.0 mph (0.9 knots)

(28) Six Mile Point: 1.6 mph (1.4 knots), 1.1 mph (1.0 knots), and 1.0 mph (0.8 knots)

(29) West Neebish Channel rock cut (course 6): 1.5 mph (1.3 knots), 1.1 mph (0.9 knots), and 0.8 mph (0.7 knots)

(30) Middle Neebish Channel dike (course 6): 1.4 mph (1.2 knots), 1.0 mph (0.9 knots), and 0.9 mph (0.8 knots).

(31) Ice.-The upper and lower parts of the St. Marys River reach average ice thicknesses of 14 and 17 inches and average maximum thicknesses of 20 and 26 inches, respectively. The river is not much affected by wind, and the channel track remains well defined with a stable ice sheet outside the channel. Broken pieces of ice accumulate in the channels and may become concentrated in some bottleneck areas. In some reaches, brash ice may accumulate up to 4 feet thick around mid-January. (See Winter Navigation, chapter 3.)

(32) A Vessel Traffic Service (St. Marys River), operated by the U.S. Coast Guard, has been established for St. Marys River and lower Whitefish Bay from De Tour Reef Light to Ile Parisienne Light, except for the waters of the St. Marys Falls Canal. The Service is designed to prevent collisions and groundings and to protect the navigable waters concerned from environmental harm resulting from such collisions or groundings.

(33) The Vessel Traffic Service provides for a Vessel Traffic Center (VTC), that may regulate the routing and movement of vessels by movement reports of vessels, specific reporting points, and VHF-FM radio communications. The Service includes oneand two-way traffic areas, areas of allowed and prohibited anchorage, and speed limits.

(34) The Vessel Traffic Center, call sign "Soo Control," is operated continuously, and maintains radiotelephone communications with vessels on VHF-FM channel 16 and channel 12.

(35) Participation in the Service is mandatory for certain vessels. (See 33 CFR 161.801, chapter 2, for classes of vessels affected.)

(36) This Service is intended in no way to relieve any person of complying with the navigation rules for harbors, rivers, and inland waters generally; the Inland Navigation Rules; Vessel Bridge-toBridge Radiotelephone Regulations; the Federal Boating Safety Act of 1971, or any other law or regulation.

(37) See St. Marys Falls Canal, this chapter, for procedures and regulations affecting vessel operations approaching and traversing St. Marys Falls Canal.

(38)

The initial reporting point for upbound vessels is abeam De Tour Reef Light; for downbound vessels, abeam Ile Parisienne Light in Whitefish Bay. Permanent reporting points have been established throughout the waterway. Temporary or seasonal reporting points are established as conditions dictate. (See 33 CFR 161.801 through 161.894, chapter 2, for rules affecting vessel operations in the Vessel Traffic Service.) (39)

Pilotage.-The waters of St. Marys River, bounded at the lower end by latitude 45°59′N., and at the upper end by longitude 84°33'W., are Great Lakes designated waters. Registered vessels of the United States and foreign vessels are required to have in their service a United States or Canadian registered pilot. Registered pilots for the St. Marys River are supplied by Western Great Lakes Pilots Association. (See appendix for address.) Pilot exchange points are at the lower entrance to the river off De Tour, Mich., and at the upper entrance to the river about 3.5 miles SE of Point Iroquois. The pilot boat at De Tour, LINDA JEAN, has a green hull and a white cabin. The pilot boat at the head of the river, J. P. IX, docks just above the locks at Sault Ste. Marie. (See Pilotage, chapter 3, and 46 CFR 401, chapter 2.)

(40)

Chart 14882.-De Tour Passage forms the mouth, or S end, of St. Marys River. The passage has deep water for a width of over 2,500 feet between the E end of the upper peninsula of Michigan on the W and the W end of Drummond Island on the E. The shoals that border the passage are well marked. (41) De Tour Reef, a rocky ledge covered 15 feet, is 0.7 mile SE of Point De Tour on the W side of the entrance to De Tour Passage. De Tour Reef Light (45°57.0′N., 83°54.2'W.), 74 feet above the water, is shown from a white square tower on a concrete crib on De Tour Reef; a fog signal, a radiobeacon, and a radar beacon (Racon) are at the light.

(42) De Tour Shoal, 0.8 mile N of De Tour Reef, is marked on the E side by a buoy that marks the W edge of the deep water through the passage.

(43) Crab Island Shoal, with boulders just below the surface, is on the E side of the passage, 1.3 miles E of Point De Tour. A lighted bell buoy marks the W edge of the shoal. Adjacent W of the buoy, De Tour Passage has been dredged to a depth of 30 feet. (44) Frying Pan Shoal, boulders covered 18 feet, extends about 0.25 mile from shore on the W side of the passage 2.2 miles N of De Tour Reef Light. Frying Pan Island, 0.3 mile N of Frying Pan Shoal, is marked on the E side by a light. An abandoned fueling dock on the SE side of the island has a depth of about 21 feet alongside.

(45) De Tour Village, Mich., is on the W side of De Tour Passage NW of Frying Pan Island. A ferry for passengers, autos, and limited freight operates year round from the village across the passage to Drummond Island. Small craft landing at De Tour Village must take care to avoid submerged cribs and dock ruins. A Michigan State Waterways Commission small-craft harbor protected by a breakwater is about 400 yards N of the ferry pier. Transient berths, gasoline, diesel fuel, water, electricity, sewage pump-out, and harbormaster services are available. The harbormaster monitors VHF-FM channels 16 and 9.

(46) A U.S. Customs representative is available at De Tour village. The breakwater is marked by a light on its S end.

(47) The W shore of Drummond Island fronts De Tour Passage from Barbed Point N for 3 miles to Black Rock Point. Dolomite is shipped from an 800-foot dock of Osborne Materials Co., 1.3 miles N of Barbed Point. The dock has a deck height of 10 feet and reported depths of 23 feet alongside. A conveyor system can

load vessels at 4,000 tons per hour. Buoys mark shoals N and S of the dock.

(48)

Gaffney Point (46°00.7′N., 83°54.5'W.) is on the W side of De Tour Passage 1.4 miles N of De Tour Village. Watson Reefs is a narrow shoal about 0.2 mile offshore between Gaffney Point and the village. Buoys mark the NE and SE sides of the shoal, and a light is near the center. Pipe Island, marked on the SW side by a light, is 0.6 mile NE of Gaffney Point. A buoy marks the extent of shoals SW of the island. Pipe Island Twins is a pair of small islands about 0.5 mile NE of Pipe Island with shoals between. The E island is marked at the N end by a light, and shoals that extend N from the light are marked by a lighted buoy. Pipe Island Shoal, with a least depth of 11 feet, is 0.5 mile SE of Pipe Island. A lighted buoy marks the SE side of the shoal.

(50)

A coaling station of the Interlakes Steamship Company is at a 1,000-foot wharf 0.6 mile NW of Gaffney Point. The reported controlling depth is 26 feet along the lower 700 feet of the wharf face. A shoal with a least depth of 22 feet is about 400 feet NE of the face.

(51) Sweets Point is about 2 miles NW of Gaffney Point. Shoals extend about 0.6 mile N from the point and are marked near the outer end by a light.

(52) Raber Point (46°04.0′N., 84°01.9′W.), 7 miles NW of Gaffney Point, is the S entrance point to Raber Bay. Lime Island is in the middle of the river, 1.7 miles NE of Raber Point. An 800foot wharf is the W side of Lime Island. The wharf, marked at its S end by two lights, has least depths of about 17 feet along the upper 300 feet and 25 feet along the lower 500 feet. In 1988, it was reported that the wharf was no longer in operation.

(53) At the N end of De Tour Passage, the upbound and downbound vessel channels are divided by the Pipe Island group. The upbound channel leads N on the E side of Pipe Island Shoal. Abreast Pipe Island Twins Light, the channel turns NW, leads S of Squaw Island, and rejoins the downbound channel N of Sweets Point. Pipe Island Course, downbound, leads SE from Sweets Point between Gaffney Point and Pipe Island to the N end of De Tour Passage. These channels have a depth of 29 feet.

(54) Lime Island Channel, upbound and downbound, leads NW from Sweets Point to the turn between Raber Point and Lime Island and has a depth of 29 feet. At the turn, a lighted midchannel buoy separates the two-way traffic.

(55) Round Island Course, upbound and downbound, leads N from the turn at the upper end of Lime Island Channel for 3.5 miles to the turn between Point aux Frenes and Hay Point. The depth in the channel is 28 feet. Round Island, marked by a light, is on the W side of the channel near its midlength.

(56) Point aux Frenes (46°07.9′N., 84°01.7′W.) is on the W side of the river at the turn from Round Island Course into Munuscong Lake. Lights mark the course changes in the turn.

(57) Charts 14882, 14883.-Munuscong Lake is a widening in St. Marys River from Point aux Frenes upstream to Neebish Island. Lower Course 8, upbound and downbound, leads from the turn at Point aux Frenes NW for 4.6 miles through Munuscong Lake. The depth in the channel is 28 feet. The channel is marked at the lower end by a 128° lighted range on Hay Point.

(58) Chart 14883.-Near the middle of Munuscong Lake, at the upper end of Lower Course 8, the dredged channel of the St.

Marys River divides to lead around either side of Neebish Island. The upbound channel leads generally N between the E side of Neebish Island and St. Joseph Island, thence WNW between the N side of Neebish Island and the S end of Sugar Island, thence N again in Lake Nicolet to the junction with the downbound channel. The channel is about 17.5 miles long between the junctions with the downbound channel. The courses through this stretch are well marked by lighted and unlighted buoys and ranges.

(59) Course 10, marked by a 321° lighted range on the S end of Neebish Island, leads NW for 2.1 miles from the junction with the downbound channel at the upper end of Lower Course 8. The channel has a depth of 27 feet for a least width of 500 feet.

(60) Course 9 leads 3.6 miles NNE to Johnson Point on the SE side of Neebish Island. The E side of the channel has a depth of 21 feet for a width of 200 feet. The W side has a depth of 27 feet for a least width of 300 feet. The W side of the channel is marked by a 016°55' lightedrange at the upper end, and the E side is marked by an unlighted range. An L-shaped Government wharf NW of the front range light has a 46-foot face with 8 feet alongside.

(61)

Course 8 leads NW for 1 mile from Johnson Point to Mirre Point. The NE side of the channel has a depth of 21 feet for a width of 400 feet, and the SW side has a depth of 28 feet for a least width of 600 feet. The deep side of the channel is marked by a 134°56′ lighted range at the lower end and a 314° lighted range at the upper end.

(62) Course 7, Munuscong Channel, leads N for 3.2 miles from Mirre Point to Stribling Point (46°18.8′N., 84°06.9°W.), the NW point of St. Joseph Island. The E side of the channel has a depth of 21 feet for a width of 200 feet, and the W side has a depth of 27 feet for a least width of 300 feet. The E side of the channel is marked by a 177° range at the lower end and a 357° range at the upper end. The deep side is marked by a 177° lighted range at the lower end and a 357° lighted range at the upper end.

(63)

At the turn from the upper end of Course 7 into Course 6, a passage leads NE between Stribling Point and Harwood Point, the SE point of Sugar Island, to connect with St. Joseph Channel and the channel that leads N to Lake George. St. Joseph Channel separates St. Joseph Island from the mainland and leads E to connect with North Channel. (Several localities in St. Joseph Channel are described in chapter 10.)

(64) Lake George separates the E side of Sugar Island from the Ontario mainland. A channel, well marked by lighted and unlighted buoys, leads N from Harwood Point to the lake, and thence from the N end of the lake around the N side of Sugar Island to connect with St. Marys River at Sault Ste. Marie. The channel has a depth of about 10 feet. The buoys marking Lake George channel are not charted because the positions are frequently shifted to mark the best water.

(65) Course 6, Middle Neebish Channel, leads WNW for 3.2 miles from Stribling Point between the N side of Neebish Island and the S side of Sugar Island to the lower end of Lake Nicolet. The N side of the channel has a depth of 21 feet for a least width of 200 feet and is marked at the lower end by a 112° range. The S side of the channel has a depth of 28 feet for a least width of 300 feet and is marked at the lower end by a 111°55′ lighted range and at the upper end by a 292° lighted range. A dike, marked at the center and ends by lights, borders the N side of the channel for 1.2 miles near midlength of the course. The range structures at the upper end of the course are in the open water of Lake Nicolet. They are well protected with riprap and should not be passed close aboard.