Overview (map) of Russian long-distance river regular passenger ships in regions too remote for roads or railways

Question

It appears many of the big Russian rivers have passenger ships going along the river, in areas where roads and railways do not reach. What I have found so far:

• On the Yenisey river via PassazhirRechTrans, such as from Красноярск to Дудинка
• On the Pechora river, with RTK Komi: connectinng Усть-Цильма (Ust-Tsilma) with Ермица, Чаркабож with Щельяюр, Печора (Pechora) – Аранец (Aranets) – Усть-Щугер (Ust-Shchuger) (location of the European cold record at -58.1°C) – Вуктыл (Vuktyl), and Печора (Pechora) with Озерный.
• On the Lena River by Lenaturflot, such as from Yakutsk to Tiksi, between Усть — Кут (Ust-Kut) and Пеледуй (Peleduy).
• On the Ob River by Severflot, such as between Омск (Omsk) to Салехард (Salekhard), and also routes on the Irtysh, Konda, Kazim, Severnaya Sosva, Lyapin, Nadym, and Vakh rivers.

It seems such boats could be a suitable way to connect from the Trans-Siberian railway to (even) more remote locations (such as the vicinity of Lake Vivi), where roads and railways do not reach. However, I find it difficult to find information about such boats, routes, schedules, etc.. Where can I find an overview, preferably a map, of long-distance boats in Russia? By long-distance boats I mean boats that run along the river for at least some dozens of kilometres, but preferably for several days, as opposed to ferries that simply cross the river from shore to shore.

Note that I'm looking for regular passenger ships, not special tourist cruises. Specifically, I'm looking for areas where travel by river is the only way of transportation, such as in the examples I've shown; there are no roads or railways in these areas.

I don't think this map from Wikimedia Commons shows actual passenger ship routes, just old used routes:

So, a map like this but with actually trafficated routes would be nice to see!

Answer 1

As far as I know there is no such super-site that covers all river routes, since there is no monopoly in river transportation in Russia (unlike train transportation like RZD.ru where you can find and book almost everything related to trains).

If you are looking for regular passenger ships then you should search on sites that belong to local river transportation companies. Usually those companies are situated in major cities on the route.
How to find those sites? Take start point and end point on the route and google it. There is however an inconvenience that you must use a translator, because many of these sites are simple static HTML's in Russian.

For example, for the route Krasnoyarsk-Dudinka, here is the site of the transportation company prt24

Answer 2

An overview of the river routes I was able to find:

European Russia

Pechora river

On the Pechora river, the company RTK Komi has:

• Усть-Цильма (Ust-Tsilma) – Уег – Верхнее Бугаево – Окунёв Нос – Крестовка – Медвежка – Новый Бор – Ермица, see timetable
• Чаркабож – Кипиево – Чика – Няшабож – Пиль-Егор – Щельяюр, see timetable
• Печора (Pechora) (train station) – Красный Яг – Медвежская – Кедровый Шор – Конецбор – Аранец (Aranets) – Приуральское – Даниловка – Усть Воя – Усть Сонлеск – Усть-Щугер (Ust-Shchuger) (location of the European cold record at -58.1°C) – Кырта – Подчерье – Вуктыл (Vuktyl) (see timetable)
• Печора (Pechora) with Озерный (see timetable), which is just a 10-minute car ferry.

Openstreetmap also claims a car ferry to from Щельяюр to Нарьян Мар, but I can find no evidence this still exists and it appears there are roads there now, so this might have been withdrawn.

Siberia

Yenisey river

On the Yenisey river, the company PassazhirRechTrans has:

• Красноярск (Krasnoyarsk) – Енисейск / Yeniseysk – Ярцево / Yartsevo – Ворогово / Vogorovo – Бор / Bor – Бахта – Чулково – В.Имбатское – Сургутиха – Верещагино – Бакланиха – Костино – Туруханск /Turukhansk – Горошиха – Курейка – Игарка (Igarka) – Потапово – Дудинка (Dudinka), distance 1992 km, travel time downstream 3 days 14 hours, upstream 5 days 8 hours. Runs around 20 times per year between July and October. See PRT timetable. Note that Dudinka is a closed city. I don't know the limitations of travelling all the way there, but see this question.
• Подтесово / Podtyosovo – Енисейск / Yeniseysk – Анциферово – Усть - Пит – Шишмарево – Колмогорово / Kolmogorovo – Назимово – Ярцево / Yartsevo – Никулино – Зотино – Ворогово / Vogorovo – Бор / Bor (near the occurrence of the Tunguska event), 473 km, downstream 8 hours 40 minutes, upstream 10 hours 40 minutes, July to October. See PRT timetable.
• Ярцево / Yartsevo – Кривляк – Майское, June to September, 108 km on the Sym, 3 hours downstream or 3 hours 40 minutes upstream, see PRT timetable.
• A line connecting "Торг.центр – Реч.вокзал – Караульная – Известковый – О.Овсянский – Телефонистов – Боровое – Усть-Мана", appears to be a commuter line, not sure, thrice daily April to October, see PRT timetable.
• Many short car ferries

Lena River

On the Lena River, the company Lenaturflot has:

• Якутск / Yakutsk — Тикси / Tiksi (which may well be the northernmost place one can reach with regular public transport without flying)
  Map boat Yakutsk – Tiksi. Source: Lenaturflot.
• Усть — Кут (Ust-Kut) – Пеледуй (Peleduy), 765 km, see timetable).
• Пеледуй – Ленск, 211 km, see timetable
• Ленск – Олёкминск, 408 km, see timetable

Ob-Irtysh basin

In Western Siberia on the Ob River, Severflot and other rivers operates 36 lines, including:

• Along the Irtysh and Ob rivers between Омск (Omsk) to Салехард (Salekhard), 2783 km, see timetable
• Along the Ob river and out to the Gulf of Ob, between Салехард (Salekhard) and Антипаюта (Antipayuta), 715 km in 40 hours, see timetable
• Along the Lyapin river: Саранпауль (Saranpaul) – Хурумпауль – Ломбовож – Сосьва (Sosva) (see Lyapin timetable)
• Along the Severnaya Sosva river: Берёзово / Beryovozo – Шайтанка – Ванзетур – Игрим / Igrim – Анеева – Сартынья – Сосьва
• Other routes on the Konda, Kazim, Nadym, and Vakh rivers.