James Dredge calls this "Occupation Bridge". Bridges so called were usually between two parts of an estate which had been divided by a canal (or in this case lock cut).
1884: Culham Lock Cut Footbridge, Henry Taunt -

Culham Lock Cut Footbridge, Henry Taunt, 1884
Culham Lock Cut Footbridge, Henry Taunt, 1884
© Oxfordshire County Council Photographic Archive; HT3880

1897: Occupation Bridge, Culham Cut, James Dredge -

Occupation Bridge, Culham Cut, James Dredge, 1897
Occupation Bridge, Culham Cut, James Dredge, 1897
© Oxfordshire County Council Photographic Archive; D230542a

Culham Lock Cut Footbridge
Culham Lock Cut Footbridge

Culham Cut Footbridge. It is said there that there was another footbridge at the western end of the cut, removed in 1940. The old maps show a footbridge about halfway between the existing bridge and the western end of the cut.

2005:  Culham Lock Footbridge, Doug Myers –

Culham Cut Footbridge, Doug Myers © 2005

Culham Cut Footbridge, Doug Myers © 2005

1890: Culham Church, Francis Frith -

1890:  Culham Church, Francis Frith

1890:  Culham Church, Francis Frith

Culham Cut is on the Right bank.
Going upstream turning into Culham Reach keep well to the right.
Coming downstream turning into Culham Cut, don't cut the corner (but don't miss it either!)