Maldon (Hythe Quay)

Year Implemented

2015

Project Type

Beneficial use of dredged sediment

Country

United Kingdom

Location

Blackwater Estuary (Essex)

Longitude

0.6904

Latitude

51.731

Habitat(s) Created
Size

Why Undertaken
  • Economic Need/Enhacement

  • Habitat Enhancement

Project Description Summary

The work at Maldon has been done for several years/decades at two key locations. The most regular work occurs on the saltmarsh spit on the north bank of the Chelmer River (immediately downstream of the Hythe Quay at Maldon, Here, in 1993, four gaps in the marsh were plugged with wooden planks bolted to timber piles at roughly 2.4m centres and infilled on both sides with dredged material using a mechanical grabbing arm attached to a barge. In 2001 dredged material was used to further nourish the saltmarsh. This work has been done for 10 years and is ongoing as material are excavated to maintain the accreting harbours and channel of upper Blackwater Estuary (Chelmer River Section). Around 2,500 tonnes of channel maintenance (approx. 2,000m3) dredge arisings are placed annually. On an intermittent basis small amounts are also placed on the south bank of the river west of Northey Island. This has been done for 30 years. All this work is done by excavating with a back hoe to a hopper (often on exposed drying intertidal) and then depositing by same backhoe approach. This keeps the materials relatively well consolidated during the whole process and enhances the stability of the deposits.

Documents/References uploaded
References
  • ABPmer, 2013 Wightlink Replacement Lymington to Yarmouth Ferries: Second Annual Mitigation and Monitoring Report (October 2013) Report R.2142 December 2013
  • Dixon M., Morris R.K.A, Scott C. R. Birchenough A and Colclough S (2008) Managed coastal realignment: lessons from Wallasea, UK. Proceedings of the Institution of Civil Engineers Maritime Engineering Print ISSN: 1741-7597 Volume: 161, Issue: 2 June 2008 Page(s): 61-71


ABPmer logo

A free resource maintained by ABPmer

CONTACT US

ABPmer
Quayside Suite
Medina Chambers
Town Quay
Southampton
SO14 2AQ

eZine Signup