Here is a page about Ringmoylan, a quay on the south side of the estuary.
We are informed that Maurice O’Connell Esq, MP for Clare, has proceeded to Scotland on a matrimonial excursion. Our correspondent states that on Saturday morning the Member for Clare induced Miss Scott to leave her father’s residence at Cahircon and proceed with him to Gretna Green. The Lady is young, handsome, and an heiress.
Wexford Conservative 3 October 1832
A letter has just arrived in town from a friend of the member for Clare, which states that, on Saturday morning, a Miss Scott eloped from Cahir Con (between Knock and Kildysart), with Maurice O’Connell, MP. They crossed the Shannon in a pleasure-boat, and landed at Shanagolden, county of Limerick. From thence they proceeded in a chaise through Limerick. Their route will probably be through Waterford to Bristol, and thence northward to Gretna Green. Miss Scott has, or will have, it is said, £20,000.
Spectator 6 October 1832 citing “Dublin Paper”
It’s not safe to believe conservative papers.
At Tralee, by special licence, by the Very Rev Dr McEnery, and afterwards at Kenmare, by the Rev William Godfrey, Rector of that parish, Maurice O’Connell, MP for the County of Clare, to Mary Frances, only daughter of Bindon Scott Esq of Caheracon in that County.
Limerick Chronicle 3 October 1832
Who said Cahircon was boring?
Mind you, Mary Frances may have inherited less than she expected. Perhaps if her father had spent less on the house of the dead, he might not have ended up as the only Shannon Estuary landlord unable to pay his debt to the Shannon Commissioners. His estate was offered for sale in the Encumbered Estates court in 1854.
Encouraged by the erection of the fishery piers on this coast, two persons registered themselves as fish-curers, viz Francis Coffee, on the 10th of March, at Liscannor, and James Shannon, on the 26th of April, at Seafield.
On the 26th instant I had a request note from the former to attend at his curing-house on the 28th, to inspect seven hundred and sixty ling, and nine hundred and ninety-six cod; I accordingly attended, and have great pleasure in saying, that a finer parcel of fish I never beheld; I at the same time registered twenty-six row-boats.
From thence I proceeded to Seafield to see what was going on there, where, I am sorry to say, I found the fishermen very desponding; they had an immense quantity of fish, offering at 1½d per dozen; but few purchasers, Mr Shannon not having as yet begun to cure. At Liscannor, agreeable to a previous arrangement made with the fishermen, Mr Coffee pays 3½d per dozen.
It would tend greatly to promote this speculation if some little additions were made to the bounty in lieu of the drawback on the salt, which they find it very difficult to recover, principally owing to the great distance to any custom-house, and the difficulty of travelling bad roads.
I send herewith the production bounty debenture. As the curer has but a small capital, I hope the board will order payment with as little delay as possible; every little encouragement that can be given this speculation in its infancy will greatly tend to promote it; and I have no doubt, in a short time, it will become very general, and productive of great advantage to the country.
I am, Sir, &c, &c, (signed) James Patterson
Report from the Select Committee on the Employment of the Poor in Ireland Ordered, by The House of Commons, to be Printed, 16 July 1823  with edits by me
The word “slob” is a provincial term, and applied to banks of mud in the same way that the word “warp” is used to signify similar formations in the River Humber.
Second Report of the Commissioners appointed pursuant to the Act 5 & 6 William IV cap 67 for the improvement of the navigation of the River Shannon; with maps, plans, and estimates HMSO, Dublin 1837
According to the eleventh and final report of the Shannon Commissioners, published in 1850 but covering the year 1849, each of the quays built by the commissioners on the Shannon Estuary had an officer stationed at it to collect tolls and other charges. Five of the six — Querrin, Saleen, Kilteery, Kildysart [aka Cahircon] and Clare [now Clarecastle] — had Second Class Collectors; Kilrush, being busier, had a First Class Collector.Moving upriver, Limerick was one of only two places on the Shannon to have an Inspector; it also had a First Class Collector and a Lock-keeper. Park, the next lock up on the Limerick Navigation, also had a keeper, as did five of the six locks on the Plassey–Errina Canal — Plassey [aka Annaghbeg], Gillogue, Newtown, Cloonlara [so spelt] and Errina. Presumably the Cloonlara keeper also locked after the nearby Monaskeha Lock. Preusmably, too, the keepers collected any tolls or charges due at the locks: there were no separate collectors, yet from other evidence we know that tolls and wharfage were collected at Plassey [Annaghbeg] and Errina. Back on the river, O’Briensbridge had a Second Class Collector. On the Killaloe Canal, each of the three locks — Cussane, Moyse [sic] and Killaloe — had a keeper; the Cussane keeper must have collected tolls and wharfage. Killaloe had a First Class Collector.
On Lough Derg, Scarriff and Portumna each had a Second Class Collector. Portumna, like several places upstream, had an opening bridge, but the Shannon Commissioners did not employ a bridge-keeper: the bridge was not built, owned or operated by the Shannon Commissioners.
Back on the river, on what used to be called the Middle Shannon, the commissioners employed both a Second Class Collector and a lock-keeper at Victoria Lock (Meelick). There was another Second Class Collector, and a bridge-keeper, at Banagher. At Wooden Bridge, the crossing of the Shannon from the Grand Canal’s main line to its Ballinasloe line, the commissioners employed two ferry boatmen: by that stage the bridge no longer existed and the commissioners had installed a ferry to carry horses and tow boats between the canals.
Shannon Bridge had a Second Class Collector and a bridge-keeper; Athlone had a bridge-keeper but earned itself a First Class Collector. On Lough Ree, Lecarrow and Lanesborough each had a Second Class Collector but Tarmonbarry had nobody: a First Class Collector was assigned to Cloondragh [so spelt] but presumably had to look after Clondra and Tarmonbarry locks, the weir, Tarmonbarry bridge and the collection of tolls. Mighty men they had back then.
The second Inspector was based at Rooskey, along with a lock-keeper who presumably also operated the bridge and did anything that needed doing on the weir. Albert Lock on the Jamestown Canal had a lock-keeper but Kilbride, the quay at the upper end of the canal, had a wharfinger, the only one on the Shannon.
The collection of tolls (presumably by the wharfinger) did not begin at Kilbride until March 1849 but in that year it took in £6 in tolls and £1 in wharfage, compared with £1 + £2 at Drumsna and £0 + £0 at Jamestown. Perhaps the road beside the quay made it a suitable place for cargoes from Roscommon to transfer from road to water transport.
Carrick-on-Shannon, not an important station on the Shannon, had just a Second Class Collector; there was a lock-keeper at Knockvicar for the Boyle Water and another at Battle Bridge who presumably looked after all the locks on the Lough Allen Canal.
Cranes were provided at several places but there is no mention of designated crane-operators.
Source: Eleventh and Final Report of the Commissioners under the Act 2 & 3 Vict c61 for the improvement of the Navigation of the River Shannon, Ireland; with an appendix Ordered, by The House of Commons, to be Printed, 3 June 1850 
Kilteery pier, on the Shannon estuary, August 2015
Bartlett drawing of turf boats below Wellesley (now Sarsfield) Bridge, Limerick.