The Romans constructed a bridge of wood and stone just upstream of present-day Chepstow.
The River Wye has been navigable up to Monmouth since at least the early 14th century.
 It was improved from there to a short distance below Hereford by William Sandys in the early 1660s with locks to enable vessels to pass weirs.
 According to Herefordshire Council Archaeology, these were flash locks.
The work proved to be insufficiently substantial and in 1696 a further Act of Parliament authorised the County of Hereford to buy up and demolish the mills on the Wye and Lugg.
 All locks and weirs were removed, except that at New Weir forge below Goodrich, which survived until about 1815.
 This was paid for by a tax on the county.
 Weirs were removed all along the Wye in Herefordshire, making the river passable to the western boundary, and beyond it at least to Hay on Wye.
 A horse towing path was added in 1808, but only up to Hereford; previously, as on the River Severn, barges were man-hauled.
 Money was spent several times improving the River Lugg from Leominster to its confluence with the Wye at Mordiford, but its navigation is likely to have been difficult.
 The Wye remained commercially navigable until the 1850s, when commercial traffic moved to railways.
 It is still used by pleasure craft.
The Romans constructed a bridge of wood and stone just upstream of present-day Chepstow. The River Wye has been navigable up to Monmouth since at least the early 14th century.  It was improved from there to a short distance below Hereford by William Sandys in the early 1660s with locks to enable vessels to pass weirs.  According to Herefordshire Council Archaeology, these were flash locks. The work proved to be insufficiently substantial and in 1696 a further Act of Parliament authorised the County of Hereford to buy up and demolish the mills on the Wye and Lugg.  All locks and weirs were removed, except that at New Weir forge below Goodrich, which survived until about 1815.  This was paid for by a tax on the county.  Weirs were removed all along the Wye in Herefordshire, making the river passable to the western boundary, and beyond it at least to Hay on Wye.  A horse towing path was added in 1808, but only up to Hereford; previously, as on the River Severn, barges were man-hauled.  Money was spent several times improving the River Lugg from Leominster to its confluence with the Wye at Mordiford, but its navigation is likely to have been difficult.  The Wye remained commercially navigable until the 1850s, when commercial traffic moved to railways.  It is still used by pleasure craft.
River Wye