A coastal management scheme: Lyme Regis

Lyme Regis

Lyme Regis is a small seaside town in west Dorset, on the Jurassic Coast World Heritage Site. It depends on : visitors come for its beaches, its historic harbour wall, the Cobb, and to hunt for fossils.

Its council describes it as sitting on one of the most unstable and actively eroding stretches of coastline in the country.

Why a scheme was needed

Unstable land: slippery clays and sands lie on top of layers of limestone and shale that slope towards the sea. In wet weather, the top layer slides over them in .
Erosion: the sea eats away the bottom of the landslides, so the land keeps moving. It had undermined the old sea walls and washed away much of the beach.
Damage: as the land moved, buildings subsided and houses were damaged.
The future: after years of high rainfall, landslides east of the town advanced rapidly. Studies showed that, without action, the sea wall would fail, and homes, roads, a car park, the football ground and important pipes and cables would be lost within 50 years.

Key terms

The strategy

The Lyme Regis Environmental Improvements scheme was planned in the early 1990s and built in phases:

Phase I (finished 1995): a new and , a promenade, and a sewage pumping station.
Phase II (2005 to 2007): the beach was replenished with sand and shingle; the rock armour at the end of the Cobb was extended; a new sea wall and promenade were built. Behind, 1,150 bored piles and soil nails pin the unstable ground to firmer rock below, and new drains take water out of the slopes. It included what had been planned as Phase III.
Phase IV (from 2013, about two years): a new concrete sea wall at East Cliff, with 34 km of soil nails and more piles and drains. It cost about £19 million.

Key terms

Effects

Phase IV secured about 390 m of coast for the next 50 years, saving up to 480 homes from damage or loss of access, and protecting major pipes and cables.
a wider beach of sand and shingle, new promenades, access along the beach even at high tide, and re-landscaped gardens.
Recognition: Phase I won awards for the quality of its design.
The environment: the East Cliff works removed invasive plants from the slopes and restored natural habitats.

A further phase, to strengthen the Cobb, has been planned.

Key terms

Conflicts

Cost: the scheme cost millions of pounds. Most came from the government (Defra gave £14.6 million for Phase IV alone). Some argue that money should go to places where more people are at risk.
Disruption: residents and businesses lived with years of building work. The council kept the main beach and at least one garden open each summer holiday.
Heritage and wildlife: much of the East Cliff work lies within the World Heritage Site and protected wildlife sites. The coast is valued for its landslides, which expose fossils and create habitats; stabilising the cliffs stops them.

Judgement: the scheme has protected the town and its tourism, but at a high cost, and by stopping natural processes on a world-famous coast.

Exam tip

Use Lyme Regis facts in a 6-mark answer: the phases, 480 homes, £19 million.

Exam practice

Plan your own answer first, then open the model answers to see what each level looks like.

9 marks · about 9 minutes

To what extent has a coastal management scheme you have studied been successful?

To what extent means: Weigh up how far something is true, with evidence on both sides, then give a clear judgement.

Link it

Use the facts from:

Lyme Regis Environmental Improvements (Lyme Regis, west Dorset, Early 1990s to about 2015)

Level 1 (Basic)· 3/9 marks (band 1–3)

The Lyme Regis scheme was successful because it built a sea wall and protected the town. It was expensive though.

Why this level: A named scheme with simple points but little detail and no weighing up. To reach Level 2: explain the strategy with facts, and give its successes and problems.

Level 2 (Clear)· 5/9 marks (band 4–6)

Lyme Regis sits on one of the most unstable coastlines in the country. The scheme built new sea walls, rock armour and promenades, and Phase II used 1,150 bored piles and drains to stabilise the slopes. Phase IV secured about 390 m of coast for 50 years, saving up to 480 homes. It cost about £19 million for the eastern works.

Why this level: Clear, accurate description of the scheme and its successes. But the conflicts and costs aren't evaluated, and there's no judgement. To reach Level 3: weigh successes against costs and conflicts, then judge "to what extent".

Level 3 (Detailed)· 8/9 marks (band 7–9)

Lyme Regis, in west Dorset, sits on one of the most unstable, actively eroding coastlines in the country, and studies showed that without action homes, roads and services would be lost within 50 years. The scheme has largely succeeded. Phase II replenished the beach and used 1,150 bored piles, soil nails and drains to stabilise the slopes, and Phase IV at East Cliff secured about 390 m of coast for 50 years, saving up to 480 homes from damage or loss of access. A wider beach and new promenades also helped tourism, an important part of the town's economy. However, there have been costs and conflicts. The eastern works alone cost about £19 million, mostly from Defra, residents lived with years of disruption, and much of East Cliff lies in the World Heritage Site: stabilising the cliffs stops the natural landslides that expose fossils. Overall, the scheme has been very successful in protecting the town, but at a high financial and environmental cost.

Why this level: Detailed, accurate evidence of the strategy, its successes and its conflicts, weighed to reach a clear "to what extent" judgement. This is Level 3.

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