are Pontchartrain's reefs?|
Dear Capt. Paul:Can you give me the GPS
coordinates for the artificial reef balls that were placed in Lake
Capt. Paul’s Response:
At this time,
there are three locations in Lake Pontchartrain where artificial
reefs are located. Two are on the south shore and one on the north
The first and older artificial reef is located along the south
shore about two miles east of Lakefront Airport.
The stated DWF position for the reef is in degrees, minutes and
seconds, and was determined using NAD 27 datum. Their published
position is N30 03’ 30” x W89 59’ 37”.
I recently checked the reef for an article, and found the
southernmost position to be located at N30º 03.514 x W89º 59.621. My
readings were determined using DDD,MM.mmm and WGS 84 Datum.
My position for the buoy marking the location is at or about N30º
03.548 x W89º 59.637. It is about 216 feet at a bearing of 340º
(magnetic) from the published reef position.
Checking with my depth finder, I noted that the water depth in
the area averaged about 13 feet, whereas water over the reef where
solid structure appeared was 10 to 12 feet. This indicated a rise in
the lake bottom of about 2 to 3 feet.
Also by using the depth finder, I noted that the marker buoy
marked the southernmost part of the reef. The reef, according to my
readings, is a random placement of rocks that total distance of
about 341 feet from the buoy at a bearing of 342º. The reef is not a
continuous reef, but it looked like several piles of rocks placed
from a point just south of the official marker buoy extending to the
There’s another collection of reefs farther to the west. For the
readers who may not have seen Andy Crawford’s article, “New reefs
adding to Pontchartrain habitat,” in the November issue of Louisiana
Sportsman magazine, I will quote part of his story.
“They (the three reefs) form a triangle around three existing
shell oil-field pads located about three miles west of the Causeway
Bridge and 2 ½ miles north of the Kenner/Metairie shoreline.”
The story continues by describing these reefs saying that unlike
the older Pontchartrain reef, which is made of various-sized rocks,
these newer ones are made of over 600 reef balls. These dome-shaped
reefs are hollow concrete structures with various-sized holes
throughout their surface. They look like half of a “Wiffle”
baseball, and are placed in 13 to 15 feet of water. Each is marked
with a yellow buoy.
I surmise that the state used NAD 27 datum for their positions,
as all of their other artificial reefs are stated in that datum.
The location of the first reef is N30 05’ 01.68” x W90 12’ 05.76.
The second location sits at N30 05’ 02.04 x W90 12’ 34.92. Reef No.
3 is located at N30 05’ 17.34 x W90 12’ 20.16.
Each reef is about 200 by 300 feet, and provides 3 to 4 feet of
A friend of mine investigated the northshore reef in mid January.
He indicated that there is a small yellow marker buoy over the site
and that there are several cane flags marking the area. He advised
that the reef is a rather small area, and that it is located at or
about N30 16.298 x W90 03.755 (DDD,MM.mmm using WGS 84 datum).
That location is about 2.8 miles due east (90 degrees) from the
causeway, 3.8 miles SSW (199 degrees) of Green Point, about 4.4
miles west-northwest (275 degrees) of Goose Point and about 6.5
miles SSE (164 degrees) from the entrance to Mandeville harbor at
the Causeway by the north shore.
Dear Capt. Paul:
I have the Garmin GPS map
76, the one with 8 megabytes of memory. The only problem I am having
with it is that the track line showing where I have traveled is thin
and hard to see in a moving boat.
Is there any way to darken or expand the width of the track
line, so when I am back-tracking the line will be more
Capt. Paul’s Response:
Not if you are trying to follow
the track in the form that it is shown on the map screen. To obtain
a better view, save the track back and navigate from the saved info.
It will then be possible to use any of the navigation screens to
backtrack your route.
To do that, you should clear the track log each time you go out
so that you have a clear, uncluttered track-back trail. Then save
the track, and navigate back using any of the screens you would
Keep in mind that the track-back log is meant to be a temporary
means of returning to your starting point. If it is important for
you to use the trail again, save it as a more permanent route.
Capt. Paul’s next seminar will be held at Memorial Baptist
School cafeteria located at 5701 Veterans Blvd., Metairie, on March
13. Sign-in and late registration will begin at 9 a.m.
The cost is $50 if preregistered or $60 at the door. Children
under the age of 16 are free when accompanied by a paying,
All attendees will receive a coupon worth 25 percent off
certain Maptech computer mapping products.
Call (504) 467-3485 or e-mail firstname.lastname@example.org for more