__NOTOC__ This is a list of the

Sites of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...

(SSSIs) in the former county of Avon, England, United Kingdom. In England the body responsible for designating SSSIs is

Natural England Natural England is a non-departmental public body in the United Kingdom sponsored by the Department for Environment, Food and Rural Affairs. It is responsible for ensuring that England's natural environment, including its land, flora and fauna, ...

, which chooses a site because of its

fauna Fauna is all of the animal life present in a particular region or time. The corresponding term for plants is ''flora'', and for fungi, it is '' funga''. Flora, fauna, funga and other forms of life are collectively referred to as '' biota''. Zoo ...

flora Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. E ...

geological Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other E ...

or physiographical features. Although the county of Avon no longer exists, Natural England still uses its former borders to mark one of its Areas of Search. As of 2006, there are 86 sites designated in this

Area of Search The following is a list of Sites of Special Scientific Interest (SSSI) by area of search, in the United Kingdom. SSSIs are areas of conservation, consisting of protected areas, recognised for their biological or geological significance. In Northe ...

, of which 38 have been designated due to their biological interest, 39 due to their geological interest, and 9 for both. Natural England took over the role of designating and managing SSSIs from

English Nature English Nature was the United Kingdom government agency that promoted the conservation of wildlife, geology and wild places throughout England between 1990 and 2006. It was a non-departmental public body funded by the Department for Environmen ...

in October 2006 when it was formed from the amalgamation of English Nature, parts of the

Countryside Agency The Countryside Agency was a statutory body set up in England in 1999 with the task of improving the quality of the rural environment and the lives of those living in it. The agency was dissolved in 2006 and its functions dispersed among other bod ...

and the Rural Development Service. The English counties were revised under the 1974 reorganisation of local government. Until the 2010s,

, which maintains the database of English SSSIs, kept the listing of counties as it was in 1974, but by 2015 they had updated their lists to reflect some later changes. However, even though Avon was abolished in 1996 it is still used as an area of search by Natural England, rather than being divided between the

Gloucestershire Gloucestershire ( abbreviated Glos) is a county in South West England. The county comprises part of the Cotswold Hills, part of the flat fertile valley of the River Severn and the entire Forest of Dean. The county town is the city of Gl ...

and

Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...

lists. The data in the table is taken from English Nature in the form of citation sheets for each SSSI.''English Nature'' citation sheets for each SSSI ( PDF files). Retrieved on 2006-08-05. For other counties, see

List of SSSIs by Area of Search The following is a list of Sites of Special Scientific Interest (SSSI) by area of search, in the United Kingdom. SSSIs are areas of conservation, consisting of protected areas, recognised for their biological or geological significance. In North ...

Sites

, - ,

Barns Batch Spinney Barns Batch Spinney () is a 0.06-hectare geological Site of Special Scientific Interest near the village of Dundry, North Somerset, notified in 1987. The English Nature citation says that Barns Batch Spinney is important because of the exposur ...

, , align="center" , , align="right" , 0.1 , align="right" , 0.2 , align="center" , , align="center" , 1987 , align="center" , , - , Bickley Wood , , align="center" , , align="right" , 9.5 , align="right" , 23.5 , align="center" , , align="center" , 1988 , align="center" , , - ,

Biddle Street, Yatton Biddle Street, Yatton () is a 44.8 hectare biological Site of Special Scientific Interest (SSSI) near the village of Yatton in North Somerset, notified in 1994. Management practices and the variation in the soils has resulted in the watercourses ...

, align="center" , , , align="right" , 44.8 , align="right" , 110.7 , align="center" , , align="center" , 1994 , align="center" , , - ,

Bishop's Hill Wood Bishop's Hill Wood () is a biological Site of Special Scientific Interest (SSSI) in England. It lies just to the east of the village of Wickwar, South Gloucestershire South Gloucestershire is a unitary authority area in the ceremonial coun ...

, align="center" , , , align="right" , 30.6 , align="right" , 75.6 , align="center" , , align="center" , 1984 , align="center" , , - ,

Blagdon Lake Blagdon Lake lies in a valley at the northern edge of the Mendip Hills, close to the village of Blagdon and approximately south of Bristol, England. The lake was created by Bristol Water (Bristol Waterworks Company as it was known then), when ...

, align="center" , , , align="right" , 212.7 , align="right" , 525.6 , align="center" , , align="center" , 1971 , align="center" , , - ,

Bleadon Hill Bleadon Hill () is a 13.52 hectare geological Site of Special Scientific Interest just north of the village of Bleadon, North Somerset, notified in 1999. The site is a Geological Conservation Review site, as it shows a low ridge of calcite-cem ...

, , align="center" , , align="right" , 13.5 , align="right" , 33.4 , align="center" , , align="center" , 1999 , align="center" , , - ,

Bodkin Hazel Wood Bodkin Hazel Wood () is a biological Site of Special Scientific Interest (SSSI), just south of the village of Hawkesbury Upton in South Gloucestershire, notified in 1974. Biological interest The site has a diverse ground flora. In addition to ...

, align="center" , , , align="right" , 10.6 , align="right" , 26.2 , align="center" , , align="center" , 1974 , align="center" , , - ,

Bourne Bourne may refer to: Places UK * Bourne, Lincolnshire, a town ** Bourne Abbey ** Bourne railway station * Bourne (electoral division), West Sussex * Bourne SSSI, Avon, a Site of Special Scientific Interest near Burrington, North Somerset * Bourne ...

, , align="center" , , align="right" , 8.5 , align="right" , 20.9 , align="center" , , align="center" , 1992 , align="center" , , - ,

Bowlditch Quarry Bowlditch Quarry () is a 0.25 hectare geological Site of Special Scientific Interest near the village of Clandown, Bath and North East Somerset, notified in 1952. The site provides a remarkable attenuated and broken succession stretching from ...

, , align="center" , , align="right" , 0.3 , align="right" , 0.6 , align="center" , , align="center" , 1952 , align="center" , , - ,

Brinkmarsh Quarry Brinkmarsh Quarry () is a 0.5 hectare geological Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Irela ...

, , align="center" , , align="right" , 0.5 , align="right" , 1.2 , align="center" , , align="center" , 1974 , align="center" , , - ,

Brockley Hall Stables Brockley Hall Stables () is a 0.065 hectare biological Site of Special Scientific Interest near the village of Brockley, North Somerset, England notified in 1987. Biological Interest The SSSI designation applies to part of the former stable blo ...

, align="center" , , , align="right" , 0.1 , align="right" , 0.2 , align="center" , , align="center" , 1987 , align="center" , , - , Brown's Folly , align="center" , , align="center" , , align="right" , 39.9 , align="right" , 98.5 , align="center" , , align="center" , 1974 , align="center" , , - , Buckover Road Cutting , , align="center" , , align="right" , 1.7 , align="right" , 4.1 , align="center" , , align="center" , 1967 , align="center" , , - , Burledge Sidelands and Meadows , align="center" , , , align="right" , 48.7 , align="right" , 120.3 , align="center" , , align="center" , 2005 , align="center" , , - ,

Burrington Combe Burrington Combe is a Carboniferous Limestone gorge near the village of Burrington, on the north side of the Mendip Hills Area of Outstanding Natural Beauty, in North Somerset, England. "Combe" or "coombe" is a word of Celtic origin found i ...

, align="center" , , align="center" , , align="right" , 139.1 , align="right" , 343.8 , align="center" , , align="center" , 1952 , align="center" , , - ,

Cattybrook Brickpit Cattybrook Brickpit is a geological Site of Special Scientific Interest near the village of Almondsbury, South Gloucestershire, SSSI notification, notified in 1989. It began as a clay pit and brickworks. History The Cattybrook Brick Company w ...

, , align="center" , , align="right" , 2.2 , align="right" , 5.5 , align="center" , , align="center" , 1989 , align="center" , , - , Chew Valley Lake , align="center" , , , align="right" , 565.2 , align="right" , 1,396.6 , align="center" , , align="center" , 1971 , align="center" , , - , Cleaves Wood , align="center" , , , align="right" , 40.4 , align="right" , 99.8 , align="center" , , align="center" , 1988 , align="center" , , - , Cleeve Wood, Hanham , align="center" , , , align="right" , 8.9 , align="right" , 21.9 , align="center" , , align="center" , 1966 , align="center" , , - ,

Clevedon Shore Clevedon Shore () is a 0.38 hectare geological Site of Special Scientific Interest adjacent to the Severn Estuary at Clevedon, North Somerset, notified in 1991. It is the side of a mineralised fault, which runs east-west adjacent to the pier, an ...

, , align="center" , , align="right" , 0.4 , align="right" , 0.9 , align="center" , , align="center" , 1991 , align="center" , , - ,

Combe Down and Bathampton Down Mines Combe Down and Bathampton Down Quarries () make up a 6.22 hectare (15.37 acre) Site of Special Scientific Interest (SSSI) in Bath and North East Somerset, England, important for its bat population. The disused quarries date from the 17th and 18t ...

, align="center" , , , align="right" , 6.2 , align="right" , 15.4 , align="center" , , align="center" , 1991 , align="center" , , - , Compton Martin Ochre Mine , align="center" , , align="center" , , align="right" , 0.9 , align="right" , 2.1 , align="center" , , align="center" , 1988 , align="center" , , - ,

Congrove Field and The Tumps Congrove Field and The Tumps is a () is a biological Site of Special Scientific Interest (SSSI) on Lansdown Hill, north of Bath in Bath and North East Somerset, notified in 1991. It is an area of calcareous grassland lying over Oolitic (Jura ...

, align="center" , , , align="right" , 12.5 , align="right" , 30.8 , align="center" , , align="center" , 1991 , align="center" , , - ,

Court Hill Court Hill () is a 10.45 hectare geological Site of Special Scientific Interest near the town of Clevedon, North Somerset, England, notified in 1997. Pleistocene Court Hill is a Geological Conservation Review Site because it is the only examp ...

, , align="center" , , align="right" , 10.5 , align="right" , 25.8 , align="center" , , align="center" , 1997 , align="center" , , - , Cullimore's Quarry , , align="center" , , align="right" , 0.9 , align="right" , 2.2 , align="center" , , align="center" , 1974 , align="center" , , - , Damery Road Section , , align="center" , , align="right" , 0.5 , align="right" , 1.0 , align="center" , , align="center" , 1974 , align="center" , , - ,

Dolebury Warren Dolebury Warren (also known as Dolebury Camp) is a biological Site of Special Scientific Interest (SSSI) and ancient monument near the villages of Churchill and Rowberrow in North Somerset, part of South West England. It is owned by the Natio ...

, align="center" , , , align="right" , 90.6 , align="right" , 223.3 , align="center" , , align="center" , 1952 , align="center" , , - , Dundry Main Road South Quarry , , align="center" , , align="right" , 0.7 , align="right" , 1.8 , align="center" , , align="center" , 1974 , align="center" , , - , Ellenborough Park West , align="center" , , , align="right" , 1.8 , align="right" , 4.4 , align="center" , , align="center" , 1989 , align="center" , , - , Folly Farm , align="center" , , , align="right" , 3.1 , align="right" , 7.7 , align="center" , , align="center" , 1987 , align="center" , , - ,

Goblin Combe Goblin Combe is a dry valley in North Somerset which stretches for approximately 3½ km from Redhill, Somerset, Redhill, near Bristol International Airport on the A38 road, A38, through to Cleeve, Somerset, Cleeve on the A370 road, A370. The combe ...

, align="center" , , , align="right" , 51.9 , align="right" , 128.2 , align="center" , , align="center" , 1999 , align="center" , , - ,

Gordano Valley Gordano (or the Gordano Valley; ) is an area of North Somerset, in England. It has been designated as a National Nature Reserve. The name Gordano comes from Old English and is descriptive of the triangular shape of the whole valley from Cleved ...

, align="center" , , align="center" , , align="right" , 161.7 , align="right" , 399.5 , align="center" , , align="center" , 1971 , align="center" , , - , Ham Green , , align="center" , , align="right" , 1.1 , align="right" , 2.7 , align="center" , , align="center" , 1990 , align="center" , , - , Hampton Rocks Cutting , , align="center" , , align="right" , 1.3 , align="right" , 3.2 , align="center" , , align="center" , 1990 , align="center" , , - , Harptree Combe , align="center" , , , align="right" , 13.1 , align="right" , 32.3 , align="center" , , align="center" , 1954 , align="center" , , - ,

Hartcliff Rocks Quarry Hartcliff Rocks Quarry () is a 1.6 hectare (3.9 acre) Site of Special Scientific Interest (SSSI) near Felton, Somerset notified in 1991. According to the citation, the site "provides exposures of Triassic Dolomitic Conglomerate unconforma ...

, , align="center" , , align="right" , 1.6 , align="right" , 3.9 , align="center" , , align="center" , 1991 , align="center" , , - , Hawkesbury Meadow , align="center" , , , align="right" , 3.3 , align="right" , 8.2 , align="center" , , align="center" , 1987 , align="center" , , - , Hawkesbury Quarry , , align="center" , , align="right" , 0.3 , align="right" , 0.6 , align="center" , , align="center" , 1967 , align="center" , , - ,

Hinton Charterhouse Field Hinton Charterhouse Field () is a 0.32 hectare biological Site of Special Scientific Interest (SSSI) near the village of Hinton Charterhouse in Bath and North East Somerset, United Kingdom. It was SSSI notified in 1991. The site is situated on a ...

, align="center" , , , align="right" , 0.3 , align="right" , 0.8 , align="center" , , align="center" , 1991 , align="center" , , - ,

Hinton Charterhouse Pit Hinton Charterhouse Pit () is a 0.4 hectare geological Site of Special Scientific Interest near the village of Hinton Charterhouse, Bath and North East Somerset, notified in 1971. The Hinton Sands, where a sparse bivalve fauna has been found, is ...

, , align="center" , , align="right" , 0.4 , align="right" , 1.0 , align="center" , , align="center" , 1971 , align="center" , , - , Hinton Hill, Wellow , , align="center" , , align="right" , 0.3 , align="right" , 0.6 , align="center" , , align="center" , 1996 , align="center" , , - , Holly Lane , , align="center" , , align="right" , 0.5 , align="right" , 1.2 , align="center" , , align="center" , 1990 , align="center" , , - ,

Horseshoe Bend, Shirehampton Horseshoe Bend, Shirehampton () is an 11 acre (4.45 hectare) biological Site of Special Scientific Interest in Bristol, England, on the north bank of a lower, tidal stretch of the River Avon, Bristol, River Avon, 1.9 miles (3 kilometres) do ...

, align="center" , , , align="right" , 4.5 , align="right" , 11.0 , align="center" , , align="center" , 1999 , align="center" , , - , Huish Colliery Quarry , , align="center" , , align="right" , 0.8 , align="right" , 2.1 , align="center" , , align="center" , 1985 , align="center" , , - ,

Iford Manor Iford Manor () is a manor house in Wiltshire, England. It is a Grade II* listed building sitting on the steep, south-facing slope of the Frome valley, in Westwood parish, about southwest of the town of Bradford-on-Avon. Its Grade I registered ...

, align="center" , , , align="right" , 0.4 , align="right" , 1.0 , align="center" , , align="center" , 1996 , align="center" , , - , Kenn Church, Kenn Pier & Yew Tree Farm , , align="center" , , align="right" , 15.4 , align="right" , 38.0 , align="center" , , align="center" , 1997 , align="center" , , - ,

Kilmersdon Road Quarry Kilmersdon Road Quarry () is a 0.43 hectare geological Site of Special Scientific Interest between the village of Haydon and the town of Radstock, Bath and North East Somerset, notified in 1954. This is a key Lias locality spanning much of t ...

, , align="center" , , align="right" , 0.4 , align="right" , 1.1 , align="center" , , align="center" , 1954 , align="center" , , - , King's Wood and Urchin Wood , align="center" , , , align="right" , 128.1 , align="right" , 316.5 , align="center" , , align="center" , 1990 , align="center" , , - , Long Dole Wood and Meadows , align="center" , , , align="right" , 9.8 , align="right" , 24.3 , align="center" , , align="center" , 1997 , align="center" , , - , Lower Woods , align="center" , , align="center" , , align="right" , 280.1 , align="right" , 692.2 , align="center" , , align="center" , 1966 , align="center" , , - , Lulsgate Quarry , , align="center" , , align="right" , 1.1 , align="right" , 2.8 , align="center" , , align="center" , 1997 , align="center" , , - , Max Bog , align="center" , , , align="right" , 10.6 , align="right" , 26.2 , align="center" , , align="center" , 1988 , align="center" , , - ,

Middle Hope Sand Point in Somerset, England, is the peninsula stretching out from Middle Hope, an biological and geological Site of Special Scientific Interest. It lies to the north of the village of Kewstoke, and the stretch of coastline called Sand Bay ...

, align="center" , , align="center" , , align="right" , 84.1 , align="right" , 207.8 , align="center" , , align="center" , 1952 , align="center" , , - ,

Midger Midger () is a biological Site of Special Scientific Interest straddling the border of Gloucestershire and South Gloucestershire, SSSI notification, notified in 1966 and renotified in 1984. Since the last revision in 1974, the size has been redu ...

, align="center" , , , align="right" , 65.7 , align="right" , 162.3 , align="center" , , align="center" , 1966 , align="center" , , - , Monkswood Valley , align="center" , , , align="right" , 30.7 , align="right" , 75.9 , align="center" , , align="center" , 1990 , align="center" , , - ,

Newton St. Loe Newton St Loe is a small Somerset village and Civil parishes in England, civil parish located close to the villages of Corston, Somerset, Corston and Stanton Prior, between Bath, Somerset, Bath and Bristol in England. The majority of the village ...

, , align="center" , , align="right" , 2.3 , align="right" , 5.6 , align="center" , , align="center" , 1992 , align="center" , , - , Nightingale Valley , , align="center" , , align="right" , 5.4 , align="right" , 13.3 , align="center" , , align="center" , 1989 , align="center" , , - , North Road Quarry, Bath , , align="center" , , align="right" , 0.3 , align="right" , 0.7 , align="center" , , align="center" , 1990 , align="center" , , - , Plaster's Green Meadows , align="center" , , , align="right" , 4.3 , align="right" , 10.6 , align="center" , , align="center" , 1989 , align="center" , , - , Portishead Pier to Black Nore , , align="center" , , align="right" , 71.8 , align="right" , 177.4 , align="center" , , align="center" , 1952 , align="center" , , - ,

Purn Hill Purn Hill () is a 6.1 hectare biological Site of Special Scientific Interest near the village of Bleadon, Somerset, notified in 1990. The site is a small promontory of Carboniferous Limestone projecting southward from the main Mendip ridge. The ...

, align="center" , , , align="right" , 6.1 , align="right" , 15.1 , align="center" , , align="center" , 1990 , align="center" , , - , Puxton Moor , align="center" , , , align="right" , 31.1 , align="right" , 76.8 , align="center" , , align="center" , 1994 , align="center" , , - , Quarry Steps, Durdham Down , , align="center" , , align="right" , <0.1 , align="right" , <0.1 , align="center" , , align="center" , 1990 , align="center" , , - ,

Severn Estuary The Severn Estuary ( cy, Aber Hafren) is the estuary of the River Severn, flowing into the Bristol Channel between South West England and South Wales. Its high tidal range, approximately , means that it has been at the centre of discussions in t ...

, align="center" , , align="center" , , align="right" , 15,950.0 , align="right" , 39,410.0 , align="center" , , align="center" , 1976 , align="center" , , - , Shiplate Slait , align="center" , , , align="right" , 33.9 , align="right" , 83.8 , align="center" , , align="center" , 1987 , align="center" , , - , Slickstones Quarry, Cromhall , , align="center" , , align="right" , 2.7 , align="right" , 6.6 , align="center" , , align="center" , 1966 , align="center" , , - , Spring Cove Cliffs , , align="center" , , align="right" , 2.0 , align="right" , 4.9 , align="center" , , align="center" , 1952 , align="center" , , - , St. Catherine's Valley , align="center" , , , align="right" , 156.1 , align="right" , 385.7 , align="center" , , align="center" , 1997 , align="center" , , - ,

Steep Holm Steep Holm ( cy, Ynys Rhonech, ang, Ronech and later ) is an English island lying in the Bristol Channel. The island covers at high tide, expanding to at mean low water. At its highest point it is above mean sea level. Administratively it ...

, align="center" , , , align="right" , 25.5 , align="right" , 63.0 , align="center" , , align="center" , 1952 , align="center" , , - , Stidham Farm , , align="center" , , align="right" , 17.3 , align="right" , 42.8 , align="center" , , align="center" , 1991 , align="center" , , - , Tickenham, Nailsea and Kenn Moors , align="center" , , , align="right" , 129.4 , align="right" , 319.7 , align="center" , , align="center" , 1995 , align="center" , , - ,

Tytherington Quarry Tytherington Quarry () is a 0.9 hectare geological Site of Special Scientific Interest near the village of Tytherington, South Gloucestershire, notified in 1989. The quarry is still working, operated by Hanson Hanson or Hansson may refer to: ...

, , align="center" , , align="right" , 0.9 , align="right" , 2.2 , align="center" , , align="center" , 1989 , align="center" , , - ,

Uphill Cliff Uphill Cliff () is a 19.8 hectare biological Site of Special Scientific Interest near the village of Uphill, North Somerset, although it is in the Avon Area of Search used by English Nature which is based on the 1974-1996 county system. The s ...

, align="center" , , , align="right" , 19.8 , align="right" , 48.9 , align="center" , , align="center" , 1952 , align="center" , , - , Upton Coombe , align="center" , , , align="right" , 7.4 , align="right" , 18.3 , align="center" , , align="center" , 1989 , align="center" , , - ,

Walton Common Walton Common () is a 25.5 hectare biological Site of Special Scientific Interest (SSSI) near the village of Walton in Gordano, North Somerset, notified in 1991. The common, which is both a Scheduled Ancient Monument and an SSSI, is covered by ...

, align="center" , , , align="right" , 25.5 , align="right" , 63.0 , align="center" , , align="center" , 1991 , align="center" , , - ,

Weston Big Wood Weston Big Wood () is a 37.48 hectare woodland west of the town of Portishead, North Somerset, England. It is a nature reserve and biological Site of Special Scientific Interest, notified in 1971. The wood takes its name from the nearby vill ...

, align="center" , , , align="right" , 37.5 , align="right" , 92.6 , align="center" , , align="center" , 1971 , align="center" , , - , Weston-in-Gordano , , align="center" , , align="right" , 12.6 , align="right" , 31.0 , align="center" , , align="center" , 1993 , align="center" , , - , Winterbourne Railway Cutting , , align="center" , , align="right" , 2.0 , align="right" , 4.9 , align="center" , , align="center" , 1990 , align="center" , , - ,

Writhlington Writhlington is a suburb of Radstock and north-west of Frome in the Bath and North East Somerset district of Somerset, England. History The ancient parish of Writhlington was part of the Kilmersdon Hundred. Church The parish church was dedic ...

, , align="center" , , align="right" , 0.5 , align="right" , 1.2 , align="center" , , align="center" , 1992 , align="center" , , - , Yanal Bog , align="center" , , , align="right" , 1.6 , align="right" , 4.0 , align="center" , , align="center" , 1988 , align="center" ,

Notes

:Data rounded to one decimal place. :Grid reference is based on the

British national grid reference system The Ordnance Survey National Grid reference system (OSGB) (also known as British National Grid (BNG)) is a system of geographic grid references used in Great Britain, distinct from latitude and longitude. The Ordnance Survey (OS) devised the ...

, also known as OSGB36, and is the system used by the

Ordnance Survey , nativename_a = , nativename_r = , logo = Ordnance Survey 2015 Logo.svg , logo_width = 240px , logo_caption = , seal = , seal_width = , seal_caption = , picture = , picture_width = , picture_caption = , formed = , preceding1 = , di ...

. :Link to maps using the ''Nature on the Map'' service provided by ''Natural England''. :Size smaller than can be shown with one decimal place. Actual size: 0.006 (ha.) 0.015 (ac.). :Incorporates two former SSSIs: Severn Estuary (notified 1976) and part of Brean Down and Uphill Cliff (notified 1952). It was unified as Severn Estuary in 1989. It also overlaps with several other SSSIs: ::*Avon: Spring Cove Cliffs,

, Portishead Pier to Black Nore and

Aust Cliff Aust Cliff () is a 5.3 hectare geological Site of Special Scientific Interest adjacent to the Severn Estuary, near the village of Aust, South Gloucestershire, notified in 1954. The Severn Bridge crosses the cliff. Its SSSI designation is due to ...

. ::*Gloucestershire: Purton Passage ::*Somerset:

Brean Down Brean Down is a promontory off the coast of Somerset, England, standing high and extending into the Bristol Channel at the eastern end of Bridgwater Bay between Weston-super-Mare and Burnham-on-Sea. Made of Carboniferous Limestone, it is a ...

::*South Glamorgan: Penarth Coast :The Severn Estuary extends into two other counties and so can be found on lists of SSSIs in

and

. :The Long Dole Wood and Meadows site extends into the county of

and so can be found on the list of SSSIs in Somerset.

References

{{SSSI AOS lists Avon Avon (county)