Getting data on power line clearance - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #1  
Old 05-22-2008
Junior Member
 
Join Date: Jul 2000
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
oldjags is on a distinguished road
Getting data on power line clearance

I do all my sailing on a local hydroelectric reservoir in Alabama. There are several areas where power transmission lines cross the lake. I have contacted the power company and asked what the safe vertical clearance under these power lines is, and all I can get back from them is, basically, 'Stay away from the power lines'. Duh!

I feel like, from a legal liability standpoint, they are not willing go on record and tell me what height mast would safely pass under the lines, just in case they happen to be wrong. Either that, or they have no idea how high the lines are, and don't want to be bothered with having to go out and measure them. All they did was quote me the state law that says it's illegal to get within 6' of any high voltage transmission line.

That's fine, but if they won't tell me how high the lines are, how can I make sure I don't encroach? It's very difficult to judge height from the deck of the boat, and I'm not willing to go anywhere near the lines until I know for sure that it's safe. From a distance, it looks like there's plenty of room, but you never know.

Anybody got any advise on the best way to approach this issue with the power company? I don't want to piss them off to the point that they just decide to ban all sailboats on the lake.

Alabama just passed a law restricting the length and horsepower of power boats on all hydroelectic lakes in the state - a law that was pushed through the state legislature with the support of the power company despite the objections of most of the powerboat community. The sailing community has even less clout than the powerboaters, so I'm sure that if they deem it too inconvenient to go out and put clearance notices under all their transmission lines, they'll just go back to the state and get tall sailboats banned as well.

What's my next step? Contact the state Public Service Commission?

Lee Scott
1987 Catalina 27
Reply With Quote Share with Facebook
  #2  
Old 05-22-2008
Freesail99's Avatar
Senior Member
 
Join Date: Feb 2006
Location: New Jersey
Posts: 4,507
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
Freesail99 will become famous soon enough
Send a message via Yahoo to Freesail99
First off I think you need to look beyond the legal liability standpoint. Hitting one of those power lines could electrify your boat causing a lot of damage if not death. Where my boat is on the hard there is a 440 volt line across the creek. The chart says it is at 50 feet, which I would clear. But time and weather has caused that line to sag badly. So, we plan to place the mast on the boat and motor over to the next marina on the far side of that power line and having them put the mast up, so we don't need to past under it.
__________________
S/V Scheherazade
-----------------------
I had a dream, I was sailing, I was happy, I was even smiling. Then I looked down and saw that I was on a multi-hull and woke up suddenly in a cold sweat.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 05-22-2008
PBzeer's Avatar
Wandering Aimlessly
 
Join Date: Nov 2002
Location: Cruising
Posts: 20,258
Thanks: 0
Thanked 86 Times in 83 Posts
Rep Power: 14
PBzeer has a spectacular aura about PBzeer has a spectacular aura about PBzeer has a spectacular aura about
There should be Corps of Engineer charts for any lakes created for power generation. Particularly the Tennessee River ones. Those should have vertical clearance on them. What lake in particular are you on? Would make it much easier to give proper advice.

Try going here www.CorpsLakes.us - Corps Lakes Gateway to find the info you need.
__________________
John
Ontario 32 - Aria

Free, is the heart, that lives not, in fear.
Full, is the spirit, that thinks not, of falling.
True, is the soul, that hesitates not, to give.
Alive, is the one, that believes, in love.
JCP


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
- Website & Blog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #4  
Old 05-22-2008
merlin2375's Avatar
*starboard*
 
Join Date: Jul 2007
Posts: 495
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
merlin2375 will become famous soon enough
Do you have a reason to get near or to pass under these lines for navigation purposes or do you just want to or is it a matter of expanding your sailing area?
__________________
I sail.
Reply With Quote Share with Facebook
  #5  
Old 05-22-2008
Boasun's Avatar
Senior Member
 
Join Date: Feb 2007
Location: New Orleans, LA
Posts: 3,068
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 9
Boasun will become famous soon enough Boasun will become famous soon enough
A. If you have charts for that lake it should be on the chart, measured from the high water mark of the lake.
B. Measure the height of the towers supporting the wires. Using Trig. and a sextant.
C. Measure the low point of the catenary of the wire with a sextant and the water line of a boat that is directly under the wires. You do need to know your distance from that boat.
D. Shoot a line over the wire. and bring the ends together, trim at the water's level. Carefully retrieve the line, double it and measure.
E. Talk to the PR people of that power company and tell them that you are being given little or no information about the power lines height above the water. Smile when you do so. After all this is for safety. And those companies are always touting their safety concerns. THIS is ONE of THEM!
__________________
1600 Ton Master, 2nd Mate Unlimited Tonnage

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Maritime Instructor
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

S/V Rapture
Reply With Quote Share with Facebook
  #6  
Old 05-22-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Just remember that the wires will sag more in hot weather than in cold... since Copper expands with temperature. If the lake is high and the temps hot... and you're close to the clearance height, you might get into trouble.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #7  
Old 05-22-2008
Junior Member
 
Join Date: Jul 2000
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
oldjags is on a distinguished road
PBzeer, I've looked all over for charts that show the line clearance, but can't find any. This isn't a Corps of Engineers lake, so that link didn't help. This lake (Lay Lake) also isn't a navigable waterway, so about the only maps you can get are devoted to fishing, and are just topographical maps with depths marked in 5-10' increments - not real marine charts at all.

Sailingdog, I also just discovered that transmission lines also sag when they are under load, due to the heat generated. So, I think I'll take the minimum required clearance and double it, just to be safe.

I like Boasun's suggestion. I think I'll get a slingshot, some fishing line, and a lead fishing weight and just measure the height myself. Is there any fishing line that will conduct electricity???? Or are they all pretty much safe?
Reply With Quote Share with Facebook
  #8  
Old 05-22-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Just keep the line very, very dry...
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lines of Position, Bearings, and Fixes Jim Sexton Her Sailnet Articles 0 03-23-2004 07:00 PM
Charging with Solar Power Kevin Jeffrey Gear and Maintenance Articles 0 07-28-2003 08:00 PM
Off-Season Seminars, Part Two Dobbs Davis Racing Articles 0 01-09-2002 07:00 PM
Adapting from the Match Race Crowd Dean Brenner Racing Articles 0 11-14-2001 07:00 PM


All times are GMT -4. The time now is 05:30 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.