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Archive For: ICW – Trouble Spots – Channel South of McClellanville, SC to Awendaw Creek

  • Report and Local Notice to Mariners re McClellanville Problem Stretch, AICW Statute Miles 430-435

    McClellanville Problem Stretch - Click for Chartview

    We have been receiving AICW shallow water reports for time out of mind, centered on the Waterway channel south and west of McClellanville, South Carolina, to Awendaw Creek. And, in early 2011, we designated the area as an “ICW Problem Stretch.” As before, we recommend passage at mid or high tide and Capt. Powers confirms that recommendation with his observations. For the most recent survey of this area, see http://cruisersnet.net/?p=123112

    Transited McClellanville mm 430-435 area today- 2- 2.5 hrs after low water. No temp markers. Lowest water observed 8.0 ft
    Mike Powers S/V Second Flight

    SOUTH CAROLINA-AICW-WINYAH BAY CHARLESTON HARBOR: Severe Shoaling.
    The ACOE of Charleston, South Carolina has reported the location of severe shoaling in the AICW South of McClellanville, South Carolina. This area of severe shoaling is most significant between and near Winyah Bay-Charleston Harbor Daybeacon 35A (LLNR 34237) and Winyah Bay-Charleston Harbor Daybeacon 37(LLNR 34240). Further information can be found on the ACOE Charleston website at http://www.sac.usace.army.mil/ The ACOE has no future plans for dredging due to budget restrictions. Mariners are advised to transit the area with extreme caution. Chart 11518 LNM 44/13

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For the Waterway south of McClellanville to Awendaw Creek

    Click Here To Open A Chart View Window, Zoomed To This AICW Problem Stretch

  • Depth Survery For ” AICW Channel South of McClellanville, SC to Awendaw Creek” Problem Stretch (Statute Mile 430 to 435)

    We have been receiving AICW shallow water reports for time out of mind, centered on the Waterway channel south and west of McClellanville, South Carolina, to Awendaw Creek.
    Now, our good friends, and SSECN strategic partners, Captains Mark and Diana Doyle, founders and owners of “On The Water ChartGuides” (http://www.onthewaterchartguides.com/), give us an updated, graphic report relaying what they discovered as they navigated through the Waterway south of McClellanville on 8/27/13.
    NOTE THAT THE DOYLE’S SOUNDINGS WERE TAKEN NEAR HIGH TIDE, MEANING THAT YOU MUST SUBTRACT 4.7 FEET FROM THEIR SOUNDINGS TO DISCOVER WHAT MLW DEPTHS WOULD BE. As you will discover, there are a few spots southwest of marker #37 that would only carry as little as 5 to 5 1/2 feet at MLW!
    Incidentally, Diana and Mark have just published a new edition of their immensely popular “ICW CruiseGuide.” Click on the book graphic to the above right for more details, and to place an order!

     

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For the AICW Channel South of McClellanville, SC to Awendaw Creek

    Click Here To Open A Chart View Window, Zoomed To This AICW Problem Stretch

  • AICW Problem Stretch Shoaling Confirmed Near McClellanville, SC, Statute Mile 434

    Due to persistent shoaling, in early 2011 we designated the Waterway south of McClellanville to Awendaw Creek, as an “ICW Problem Stretch.” As before, we recommend passage at mid or high tide. Capt. Schmidt confirms that shoaling still persists in this area.

    As you know, there are problems here.
    Today, Jan. 11 starting at mile 430, beacon 35 depth drops to as low as 4 feet and is consistently 5 feet. Found two boats aground at beacon 40. It was 1330, dead low tide, new moon with prediction of -0.7 feet. By beacon 42 it was back to the normal 9-10 feet.
    Your advice to pass at mid to high rising tide is correct, but time and mother nature put us there at the wrong time. But we made it. I draw 3′-9″ so I slowly passed the grounded vessels.
    Ray Schmidt

    Went thru this area on January 6 2013 and saw 8.1′ at mid-tide. Be cautious in this area.
    Captains Gregory and Mary Yount

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For the Waterway south of McClellanville to Awendaw Creek

    Click Here To Open A Chart View Window, Zoomed To This AICW Problem Stretch

  • ARGUS Confirms Shoaling on AICW Problem Stretch – AICW Channel South of McClellanville, SC to Awendaw Creek (St. M. 430 to 435)

    Perhaps the #1 advantage of being Survice Enginnering’s ARGUS Project’s strategic web partner, is that the SSECN is the FIRST to receive shallow water updates from the various ARGUS volunteer research vessels traveling Southeastern USA coastal waters. And, that’s just what’s happened here!

    Now, it isn’t exactly a surprise that the ARGUS equipment aboard M/V Elixir has just reported finding less than optimum depths along the path of the AICW south of McClellanville, South Carolina. After all, the Salty Southeast Cruisers’ Net declared these waters as an “AICW Problem Stretch” several years ago! However, it’s certainly nice for ARGUS to verify this data, and even to pin-point the shallowest spots!

    Take a look at the first graphic below, and note the color coded ARGUS “solution sets” along the track of the AICW immediately southwest of marker #37. This stretch of the AICW lies just southwest of Jeremy Creek and McClellanville. As you can see, Elixir discovered some 6-foot MLW depths right along the mid-width of the AICW channel. Still enough for most vessels, but definitely getting on the thin side:

    And, then we have a second set of ARGUS soundings (“solution sets”) depicted in the graphic below, just a small hop farther to the southwest (northeast of marker #40). Again, LOTS of 6-foot MLW depths noted here:

    PLEASE NOTE that these depths (“solution sets”) are so NEW, they are NOT yet depicted on the Salty Southeast Cruisers’ Net Chart View “ARGUS Layer.” That will be corrected on our next update from Survice Engineering, due to be received soon. However, we thought this data was so interesting, it was worth calling to the attention of the cruising community even before this update is received and processed!

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For the AICW Channel South of McClellanville, SC to Awendaw Creek

    Click Here To Open A Chart View Window, Zoomed To This AICW Problem Stretch

  • Shallow Water at Marker #43, South of McClellanville, SC, AICW Statute Mile 434.2

    Due to persistent shoaling, in early 2011 we designated the Waterway south of McClellanville to Awendaw Creek, as an “ACW Problem Stretch.” As before, we recommend passage at mid or high tide.
    And what began as a caution has turned into an excellent discussion on GPS. Read and learn!

    Yesterday we traveled from Charleston to Georgetown on the ICW. At GREEN 43 we were dead on the magenta line when the depth under our props went to 0.2 feet. We draft only 39 inches so this is really a problem for most boats.
    We put out a securite call on the VHF and saved a couple of boats from going aground. I later heard chatter from a couple of sailboats we had passed earlier that they were having to wait for high tide to traverse this section. It was only a bar and lasted a few seconds as we cleared it but it gave us a start. Today I heard locals in Georgetown talking about trouble in the same place. Be careful out there.
    Rusty and Jan Carlisle

    I too experienced the shallow water following the magenta line on my Garmin 4210 in this area. I have found that Mr Garmin has put my “boat cursor” in the marsh while in the waters of Georgia and S. Carolina. I have find deeper water by going off the magenta at slow speed usually toward the inside of turns. I poke around a bit and find the “real channel”. With all this said, I still love my Garmin electronics. Most of the time the magenta is right on.
    Rick, Sun Gypsy

    I think you meant the outside of the turns. General rule of thumb is stay 2/3 rds of width to the outside. Imagine the current flow scouring out a channel. The scouring velocity is greatest on the outside of the turn.Seek the side with larger vegetation and steeper banks. Of course there are many other factors that can cause variations with this “thumb” rule.
    Joe

    This may or may not be another example of what can happen by spending too much time following the magenta line rather than using visual observations and following the channel markers instead. Often coming up and down the waterway, we found our plotter showing us crossing land instead of being in the channel. We have transited this section many time and were told by other boats over the VHF that there was shallow water, one telling us they
    found 4 feet in the channel. When we crossed we actually found 8 feet of water in the channel some five minutes after they passed through. There are other areas like Cumberland Dividings where following the chartplotter will put you solidly aground. I’m not saying this is the case here, but would caution everyone to not depend on the plotter for more than a reference and use good old fashion navigation. When I hear any reports that the boat was aground and on the magenta line, I have to ask myself how accurate the plotter is in this section. Many boats will make the same mistake and before long there are several reports of groundings because too many of us religiously follow the magenta line. The towing companies will often tell us that they have pulled many boats off shallows in the area. The reason is because following the plotter into shallow water is a common problem. We often see many boats running from green to the next red marker down a channel instead of staying well in between the markers. Many channel markers along the ICW sit in one or two feet of water, but boaters will think that as long as they are inside the markers the channel is deep. Running up close to them will almost always lead to a grounding. Since our first trip south on the ICW in 1993 we have observed so many boats hard aground in what they thought was the channel, while we passed safely by. The depths do change for a variety of reasons and caution is always needed, especially in known problem spots. We too follow the various websites looking for the latest information, but often find reports that are based on operator inattention more than poor conditions. Some channels are less forgiving than others should one stray too far.
    Chuck Baier

    The problem isn’t with the chart plotter, it’s the map they used. The GPS is telling you exactly where you are, but the channel has moved relative to the chart that is published that was used on the chart plotter. The magenta line is published on the chart, and so if the channel has been moved by the moving water, which it has, then the magenta line will lead you astray.
    Follow the channel, NOT THE MAGENTA LINE! Makes no difference how new your chart plotter is, it has to do with when the chart used was updated. When you update your chart plotter, hopefully they have used the latest charts available.
    Chuck Gorgen aboard ODYSSEE

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For the Waterway south of McClellanville to Awendaw Creek

    Click Here To Open A Chart View Window, Zoomed To This AICW Problem Stretch

  • Report on AICW Problem Stretch Depths South of McClellanvile, SC, (Statute Mile 431)

    Due to persistent shoaling, in early 2011 we designated the Waterway south of McClellanville to Awendaw Creek, as an “ACW Problem Stretch.” Capt. Long gives us even more specifics. As before, we recommend passage at mid or high tide.

    Here is my track through the shoaling a mile south of McClellanville, mile 431. I went through at low water and could visually see the shallow spots that account for the “S” curve. I dug what felt like about a 3″ inch trench at the spot indicated at N33 04.239 W79 28.412. I don’t think there is a straight path through here at low water for a boat drawing more than four feet.

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For South of McClellanville

    Click Here To Open A Chart View Window, Zoomed To This AICW Problem Stretch

  • Good News on Depths in AICW Problem Stretch South of McClellanville at AICW Statute Mile 431

    As you approach the southside of McClellanville on the AICW, please heed earlier advice to favor the red side, especially in the stretch between markers 37 and 38. Please open the links below for more information and a Chart View of this area.

    Passed through this area 10/30/2011 without any indication of shallow areas. Carried over 12 foot depths and mostly deeper. Strong currents and erratic currents were common.
    Harry Miller

    Came through this stretch at absolute full-moon dead low tide 10/25/11. Took a lot of patience and feeling our way, the good news is we never saw less than 7.0 feet.
    Dan/Jaye Lunsford

    Of note are the shallow readings showing on our depth sounder from McClellanville almost to the Isle of Palms. When we came out of McClellanville, we saw readings as low at 5.5 feet but mostly 6 or 7 feet (as O.G’s depth transducer is 2 feet below the waterline, these reading translate into 7.5 feet to 9 feet, well below the nominal 12 feet supposed to be throughout the ICW. This is of no concern with our 4.5 foot draft, but I thought it worthy of note for Claiborne Young’s “Salty Southeast” blog.
    Captain Ted Jones

    We passed McClellanville, SC at low tide this morning, 3/14/2011. As anticipated, we hit very shallow water between markers 37 and 38. At one point, about midway through this section, we saw 3’9″ and were plowing through the mud. We were favoring the red side somewhat.
    Skipper Larry Thackston on M/V PEACH

    Went through today (5/8/11) , 1 hour before high tide and saw no less than 9.5 feet at my transducer which occurred at Marker 40 and 35 A. The transducer is two feet below the surface so looking at 11.5 feet. With an 7 to 8 foot fall it might be a little skinny for some boats.
    Capt. David

    5/16/2011
    With an almost full moon low tide we passed through the AICW Channel South of McClellanville, SC. Unfortunately, a late start from Charleston had us arriving at Green 47 at low tide, but we made it through with our 6′ draft without a problem.
    The least water we saw was 6.1′ when we turned into the wind near G47 to take down the mainsail. We were on the green side, but well inside the channel. Recommend staying on the red side at R46.
    The rest of the way up to R32 was in 8-9′ range with a couple of spots that flashed at 6.9′.
    As recommended we found the best depths by staying centered in the channel.
    Also note that Green 27 is missing the northbound face place.
    And an oh by the way, just north of McClellanville, we spotted two alligators casually swimming in the channel. One in the 7-8′ size range and the other 5-6′. Think twice about that little swim along this leg ;) .
    Capt Pete

    Click Here To View the Cruisers’ Net’s “AICW Problem Stretches” Listing For South of McClellanville, SC

    Passed through this area 10/30/2011 without any indication of shallow areas. Carried over 12 foot depths and mostly deeper. Strong currents and erratic currents were common.
    Harry Miller

    Click Here To Open A Chart View Window, Zoomed To the Location of South of McClellanville

    Click Here To View An Earlier Posting on this Area

  • Grounding Reported South of McClellanville, AICW Statute Mile 439

    Please note that this grounding was near high tide in the center of the channel. We have reports of recent shoaling in various spots in the AICW between Charleston Harbor and McClellanville, particularly at Mile 431. Past advice has to been to stay in the center of the channel. Maybe this new spot will be an exception. See the link for more on this area.

    We hit a shallow spot (less than 5 ft) north of Charleston just past Graham Creek between markers G64 and G61. It was close to high tide and we were aground right in the middle of the channel just opposite a small creek on the east side. I suggest staying to the green side of the channel to avoid this spot!
    Captains Harriet and Skip aboard S/V Moondance

    Click Here To Open A Chart View Window, Zoomed To the Location of Shoaling Report

    Click Here To View An Earlier Posting on Depths South of McClellanville

  • More Shallow Depths South of McClellanville at AICW Statute Mile 431

    As you approach the southside of McClellanville on the AICW, please heed earlier advice to favor the red side, especially in the stretch between markers 37 and 38. Please open the links below for more information and a Chart View of this area.

    After anchoring in the South Santee River we headed for Isle of Palms yesterday morning ( 11/5/2010 )… we traversed the McClellanville stretch 2 hours after high tide (falling) all seemed well in the middle of the channel until we sited depths in the 5 foot range in 3 different places through that run … all in mid-channel … had our water tanks been full, we’d have grounded for sure.

    Transited the area today about 2 hours before low tide. While we did see the occasional 8′ or 7.9 we saw nothing approaching 5′ while following the channel. The channel does indeed favor the red in general (that is, it is NOT in the center of the water) but it was quite possible to transit in relatively low water.
    Captain Leigh

    Click Here To Open A Chart View Window, Zoomed To the “Alert” Section of the AICW South of McClellanville, SC Where The Shallow Water Described Above Was Encountered

    Click Here To View An Earlier Posting on this Area

  • Continued Reports of AICW Skinny Water at Statute Mile 431 (south of McClellanville)

    As you approach the southside of McClellanville on the AICW, please heed the advice given below, especially in the stretch between markers 37 and 38. Please open the links below for more information and a Chart View of this area.

    Submitted on 2010/06/14 at 12:16pm
    Hit the McClellanville area in early afternoon Saturday, June 12 near low tide. A 44 ft power boat was aground on the green side between markers 37 and 38. Hang near the red side as I had no problem there.
    Capt Jim J.

    Click Here To Open A Chart View Window, Zoomed To the “Alert” Section of the AICW South of McClellanville, SC Where The Shallow Water Described Above Was Encountered

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