connection with mainland Jutland, but the towns and harbours in the western part of the Limfjord could benefit from becoming directly accessible from the North Sea, to the dismay of Aalborg. From the 1840s the western route became increasingly important, as Britain had opened for import of grain, and ships could return with British coal. However, the instability of Agger Channel made the towns of the western Limfjord look for a second option. In 1862, a flood pierced another opening, the Thyborøn Channel, through the remainder of Agger Tange (see satellite image). Agger Channel was continuously filling with sand and eventually closed in 1877. Since then, the remaining Thyborøn Channel has been kept open and navigable by dredging. The harbour of Thyborøn was built in 1914–1918 and a town was founded. The two isthmuses have shifted eastwards since the 1800s. They have only been preserved by groynes, persistent sandpumping and two road dams along their inward (eastern) side. Løgstør Banks and the Frederik VII Canal At Løgstør, where the wide, western part of the Limfjord meets the narrow eastern section, the infamous sand banks of Løgstør Grunde were an obstacle to ships. Larger ships needed to be unloaded and reloaded when passing the banks. The Frederik VII Canal at Løgstør was completed in 1861 to allow for easier passage. Traffic had increased after the western opening at Thyborøn became navigable. The sand banks were finally dredged out in 1901, rendering the canal obsolete. The canal is now a well-preserved heritage site. Plans for re-closing the western inlet A 1946 act provided for re-closing the Channel with dams and sluices at Thyborøn, but this was never carried out. This idea re-emerged in 2005 and is now officially being investigated. It is thought that the isthmuses would be easier to preserve, and that the water level of the Limfjord would be more controllable. In periods of persistent western winds, flooding occurs on low-lying land and harbour areas in the towns of the western Limfjord, since the water can't escape through the narrow, eastern part of the Limfjord. Historically, a North Sea to Limfjord canal has also been proposed between Hanstholm harbour and Vejlerne (or Klitmøller and Thisted), e.g. by Jørgen Fibiger in 1933, the engineer behind the project of Hanstholm harbour. In literature Limgrim legend According to myth, a woman (in some versions a jötunn) gave birth to a pig, Limgrim, which