Water storage

Rain does not always fall where humans want it to fall, but we work with it to our own advantage.

On a national level, dams such as the Gariep Dam, Vanderkloof Dam, Midmar Dam, Pongolapoort Dam, Vaal Dam or Theewaterskoof Dam have been constructed to collect and store rain water on a large scale. To address the country’s needs, government plans to build new dams or expand existing ones at Mzimvubu River (Eastern Cape), Clanwilliam Dam (Western Cape), the Nwamitwa Dam and Tzaneen Dam (Limpopo), the Hazelmere Dam (KwaZulu-Natal) and the Polihali Dam (in Lesotho to provide water to Gauteng).

On a local or farming level, thousands of smaller dams have been built by the owners of the land, using their tractors, dam scrapers, front-end loaders or other equipment available on the farm. At a later date this water will be used for irrigating crops, drinking water for animals and even as drinking water for human consumption.

The companies listed in this chapter are involved in water storage. Other companies involved in the water sector are listed in the general “Water” chapter.

Contents

Legal requirements before constructing new dams, altering existing dams or repairing dams that failed
Legal requirements for existing dams
National Strategy
Associations involved
Companies involved
Websites and publications

Legal requirements before constructing new dams, altering existing dams or repairing dams that failed

All relevant forms and contact details can be downloaded from www.dwa.gov.za.

There are three legal requirements that must be met before a person may construct, alter or repair a dam, namely Entitlement to Water Use, Dam Safety Regulations and Environmental Legislation.

 

Entitlement to water use (Chapter 4 of the National Water Act, 1998)

A Water Use Licence or other appropriate authorisation must be obtained from the Regional Director of the relevant region. An extensive guideline named “Water Use Authorisation Application Process” describes this process in detail. Since the acquisition of a new licence for the storage of water takes a considerable time, it is advisable to apply for such a licence as early as possible. Furthermore, the dam safety licence will not be issued for any dam before the Water Use Licence is approved by the Department.

In the case of dams that failed, existing lawful water use (subject to verification) will normally be acknowledged but it is essential that confirmation is obtained in writing from the Regional Director.

 

Requirements in terms of dam safety legislation (Chapter 12 of the National Water Act, 1998)

The first step is to apply for classification of the dam on form DW 692E if the wall height exceeds 5,0 m and if the storage capacity exceeds 50 000 m3. The Department will then inform the applicant of the classification of the dam and of further procedures.

  • If the dam is classified as a category I dam, apply for a licence to construct on form DW 694E and submit construction drawings. Construction may only commence after the licence to construct has been issued.
  • If the dam is classified as a category II or III dam, the services of an approved professional person/engineer (APP) must be obtained. The APP must apply for a licence to construct on behalf of the dam owner (this involves the submission of an application form, design report, engineering drawings and construction specifications). Construction may only commence after the licence to construct has been issued. The APP must also ensure that an adequate quality control programme is in place during the construction period. Before starting with storage of water, the APP must apply for a licence to impound (this involves the submission of an operation and maintenance manual and emergency preparedness plan together with an application form DW 696E). After completion of all construction work, the APP must submit a completion report, completion drawings and a completion certificate stating that the work has been completed according to his/her specifications.

On completion, the dam must be registered on form DW 693E.

There are further requirements in terms of environmental legislation.

Legal requirements for existing dams

All relevant forms and contact details can be downloaded from www.dwa.gov.za.

Entitlement to water use

Section 21(b) of the National Water Act, 1998 (Act 36 of 1998) defines storage of water as a water use. If more than 10 000 m3 of water is stored or in case a dam has a full supply surface area of more than 1,0 hectare, then that water use must be registered on a form that will be supplied by the Regional Director for this purpose. However, in some Water Management Areas the general authorisation does not allow any dam, irrespective of size, outside the licensing procedure and in those areas all dams must be registered. Please contact the relevant Regional Office for information in this regard.

Requirements in terms of dam safety legislation

All dams with a safety risk (a dam with a wall height exceeding 5,0 m and with the storage capacity exceeding 50 000 m3) must be registered on form DW 693E. The Department must be notified of any changes of particulars (dam owner, address, telephone numbers, person in control, etc.)

The dam must be operated and maintained in a responsible manner. Basically this requires that the owner, or the person appointed by the owner, will visit and inspect the dam on a regular (at least weekly) basis. Maintenance work must be done regularly. In the case of unsafe conditions, emergency procedures and safety measures must be taken and the Department informed about it.

The dam owner must arrange for the execution of a formal dam safety inspection when instructed to do so by the Department (at intervals between 5 and 10 years). In the case of category II and III dams the inspection must be done by an APP. In the case of category I dams it is not prescribed by whom the inspection must be done but it is in the owner’s interest to appoint an experienced person to perform this task. If necessary, the inspection report will indicate what work should be done to upgrade the dam to acceptable safety standards.

National Strategy and government contact

The Regulations regarding the safety of dams in terms of section 123(1) of the National Water Act, 1998 (Act No.36 of 1998) apply.

Department of Water and Sanitation (DWS)

A Water Use Licence or other appropriate authorisation must be obtained from the regional offices. Contact details can be found on www.dwa.gov.za (“Customer Care” and “Provincial Customer Care Walk-In Centres”).

Additional information regarding national norms and standards on water storage for irrigation purposes can also be obtained from the Department of Agriculture, Forestry and Fisheries:

Department of Agriculture, Forestry and Fisheries

  • Directorate: Water Use and irrigation Development Tel: 012 846 8567, DWUID [at] daff.gov.za
  • Directorate: Infrastructure Support Tel: 012 319 846 8502, ATvC [at] daff.gov.za

Associations involved

Companies involved

 

Earth moving equipment

Tanks, reservoirs, water proofing and dam linings

Engineering

Finance

NERPO Financial Services’ Infrastructure fund is a credit line that provides emerging farmers with finance for infrastructural developments on their farms. Visit www.nerpo.org.za.

Websites and publications

Call 012 842 4017 or email iaeinfo [at] arc.agric.za for the following publications, available from the ARC in Silverton (these publications are also available in Afrikaans):

  • Earth Dams
  • Manual for the building of circular reservoirs
  • Affordable round dam for farms: a do-it-yourself manual

Information and statistics on water can be found on www.wrc.org.za, website of the Water Research Commission.

Information on the daily and weekly flow into the major dams can be found on www.dwa.gov.za.

Find the article “Agricultural Dams Provide Drought Insurance” at www.mbb.co.za/facts-news/projects/agricultural-dams-provide-drought-insurance.

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