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The Middle River Cam

In the winter you can navigate a powered vessel through many famous colleges, but go carefully.

The Bridge of Sighs

Bridge of Sighs (St. John's).
St.Johns Kitchen bridge

St John's Kitchen Bridge
The Middle River is the part of the River Cam that runs through the backs of the Colleges. In the summer it is used almost exclusively for punting. At its upper limit there is a weir and boats cannot pass unless they can be hauled up the special ramp which is fitted with metal rollers. At its lower limit is the lock at Jesus Green which is normally kept padlocked.

It is not widely known, but in the winter (from 31 October to 31 March) it is permitted to navigate a powered vessel along the Middle River. The fee is set in the 1922 River Cam Conservancy Act at one shilling and sixpence. In practice, you simply ring up the Conservators (the phone number is displayed at Jesus Green Lock) and explain that you wish to pass through the lock; they check that your licence is valid, swear you to secrecy and then tell you the combination of the padlocks. They don't ask for the 1/6d. The Conservators like to know what boats are above the lock because they sometimes drain that part of the river so buildings by the river can be repaired. As long as they know you are there, they can warn you in advance.

pictures of the drained river

There are many shallows in the river, particularly beyond Silver Street Bridge. Press the button below to see my photographs of the river when the water was drained. These show you exactly where the shallows are.

Kings College Chapel

King's College chapel
The Mathematical bridge

Newton's Mathematical Bridge

There are ten beautiful bridges in the mile of river from Jesus Lock to Coe Fen. Some of the bridges are quite small and some are very close together. On your way upstream things are fairly straightforward but on the way back, travelling with the current, things happen rather fast. It's best not to attempt to navigate the backs after a period of heavy rain.

Jesus Lock Footbridge
Magdelene Bridge (Great Bridge)
Bridge of Sighs (St.John's Bridge)
St.John's Kitchen Bridge
Trinity Bridge
Garret Hostel Bridge
Clare Bridge
King's Bridge
Queens' Bridge (Newton's Mathematical Bridge)
Silver Street Bridge

The Mathematical bridge at Queens College was designed by Newton. Every piece of wood was in compression and the structure should have held together simply by its own weight. It is said that the iron pins were put in after they had fished all the pieces out of the river.

At the upper end of the Middle River you emerge from under Silver Street Bridge into Coe Fen where you can moor on the common opposite Charles Darwin's house where "The Origin of Species" was written. In priciple, you can continue to along the tiny stream next to Darwin College and reach the Mill Pond. However, I don't think it is deep enough to take a narrowboat.

There is no towpath on the Middle River (historically, the horses waded along a causeway which was built in the middle of the river by the Conservators to break the University's stranglehold over waterway). However, you can moor and turn it a boat at Coe Fen just next to Charles Darwin's house and opposite the Garden House Hotel. Keep to the south side of this weir pool - it is very shallow on the north side. When passing Darwin College keep well to the north where the channel is deepest.

Kings Bridge

King's Bridge
Charles Darwin's house and Coe Fen

Moored at Coe Fen
If you are planing to navigate to Cambridge why not join the "camboaters" e-mail newsgroup? This will keep you informed of important news and gossip about the river including warnings about rowing races and plans to drain the Middle River.

Camboaters e-mail list

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