Low Water Levels – Seite 3 – Captain's Handbook ©

22. Mai 201828. August 2019

MARINE NOTICE, No 032 of 2018

MARINE NOTICE, No 32 of 2018

GRAND CANAL

Grand Canal Dock, Dublin

Low Water Levels – Navigations Restrictions

Waterways Ireland wishes to notify owners and masters of vessels that Waterways Ireland are currently experiencing issues with low water levels in Grand Canal Dock.
As a result no passage will be possible through the Sea Lock until further notice. There will also be restrictions to movements on the Grand Canal Circular Line.
Masters of vessels moored in Grand Canal Dock are advised to tend their mooring lines to accommodate the reduction in water levels.
Waterways Ireland regrets any inconvenience the above causes its customers, and will issue a further marine notice when updated information is available.

P Harkin, Inspector of Navigation, 21 May 2018

1. Dublin Dragon Boat Regatta; Ringsend; © Michael Slevin

17. Oktober 201528. Oktober 2015

MARINE NOTICE 131 of 2015

MARINE NOTICE, No.131 of 2015

SHANNON NAVIGATION

LOW WATER LEVELS

WATERWAYS IRELAND WISHES TO ADVISE ALL MASTERS AND USERS OF THE SHANNON NAVIGATION THAT THE WATER LEVELS HAVE DROPPED BELOW ORDINARY SUMMER LEVEL DUE TO LOW RAINFALL IN RECENT WEEKS.

MASTERS OF VESSELS, PARTICULARLY THOSE WITH DEEP DRAFTS, ARE ADVISED TO NAVIGATE WITH DUE CAUTION.

Charles J. Lawn, Inspector of Navigation, 16 Oct 2015

15. Oktober 201418. Juni 2019

MARINE NOTICE 088 of 2014

Map Inland Waterways Ireland;© Waterways Ireland — Inland Waterway; © WI

MARINE NOTICE, No. 88 of 2014

(Re-issued 14 Oct 2014)

All Navigations

Low Water Levels

Advisory Information

The extended period of dry weather has meant that water levels in the navigations are presently lower than normal for this time of year.
Masters and users are advised of the following:

Navigation
Where water levels fall below normal summer levels masters should be aware that their vessels may be at risk of grounding, particularly deep drafted vessels.
To reduce this risk masters should navigate where possible on or near the centreline of the channel and also avoid short cutting in dog-legged channels and navigating too close to navigation markers.
Proceeding at a slow speed will also reduce “squat” effect i.e. where the vessel tends to sit lower in the water as a consequence of higher speed.
Slipways
Low water levels will also impact on slipways with reduced slipway length available under the water surface and the possibility of launching trailers dropping off the end of the concrete apron onto the river /lake bed and causing damage to trailer, outboard motor or boat. More slipway surface will also be susceptible to weed growth requiring care while engaged in launching boats.
Bank Erosion
Very dry riverbanks are more susceptible to erosion from vessel wash. Please ensure you adhere to the speed limits and maintain a reduced wash.
Lock Share.
Where appropriate by maximising on the number of vessels in a lock the total volume of water moving downstream is decreased. This also reduces the volume of water used. Please be patient and wait for other boaters to share the lock with you rather than using locks for single passages.
Efficient Lock Use.
Make sure lock cycles are used for vessels travelling each way. Each lock cycle should take boats both up and down stream. Shut all sluice gates and paddles when leaving a lock.
Service Blocks
You are requested not to leave taps running at watering points or service blocks in the interest of water conservation.

Charles Lawn, Inspector of Navigation, 18 July 2014

Bank Erosion, Very dry riverbanks SEW; click picture to "enlage" — Bank Erosion, Very dry riverbanks SEW

18. Juli 201418. Juni 2019

MARINE NOTICE 088 of 2014

MARINE NOTICE, No. 88 of 2014

All Navigations

Low Water Levels

Advisory Information

The extended period of dry weather has meant that water levels in the navigations are presently lower than normal for this time of year.
Masters and users are advised of the following:

Navigation
Where water levels fall below normal summer levels masters should be aware that their vessels may be at risk of grounding, particularly deep drafted vessels. To reduce this risk masters should navigate where possible on or near the centreline of the channel and also avoid short cutting in dog-legged channels and navigating too close to navigation markers. Proceeding at a slow speed will also reduce “squat” effect i.e. where the vessel tends to sit lower in the water as a consequence of higher speed.
Slipways
Low water levels will also impact on slipways with reduced slipway length available under the water surface and the possibility of launching trailers dropping off the end of the concrete apron onto the river /lake bed and causing damage to trailer, outboard motor or boat. More slipway surface will also be susceptible to weed growth requiring care while engaged in launching boats.
Bank Erosion
Very dry riverbanks are more susceptible to erosion from vessel wash. Please ensure you adhere to the speed limits and maintain a reduced wash.
Lock Share.
Where appropriate by maximising on the number of vessels in a lock the total volume of water moving downstream is decreased. This also reduces the volume of water used. Please be patient and wait for other boaters to share the lock with you rather than using locks for single passages.
Efficient Lock Use.
Make sure lock cycles are used for vessels travelling each way. Each lock cycle should take boats both up and down stream. Shut all sluice gates and paddles when leaving a lock.
Service Blocks
You are requested not to leave taps running at watering points or service blocks in the interest of water conservation.

Charles Lawn, Inspector of Navigation, 18 July 2014

24. September 20132. Juli 2019

MARINE NOTICE 113 of 2013

Lough Ree; © esri; click to Esri Map Lough Ree — Lough Ree; © esri

MARINE NOTICE, No 113 of 2013

SHANNON NAVIGATION
Lough Ree

Cautionary Warning – Low Water Levels

Waterways Ireland wishes to advise masters that due to the prolonged spell of dry weather water levels on Lough Ree have fallen below normal summer level.
Masters of vessels and particularly those of deep drafted vessels should navigate with due caution and at an appropriate speed to avoid striking the bottom.
Waterways Ireland thanks its customers for their cooperation in this matter.

Charles Lawn, Lt Cdr (rtd), Inspector of Navigation, 24 Sep 2013