Megarritys Bridge | NSW Environment, Energy and Science

Culture and heritage

Heritage

Megarritys Bridge

Item details

Name of item: Megarritys Bridge
Other name/s: Warragamba Pipeline - Warragamba Emergency Scheme - Megarritys Bridge
Type of item: Built
Group/Collection: Utilities - Water
Category: Water Supply Reservoir/ Dam
Location: Lat: -33.8744092727697 Long: 150.611221308317
Primary address: Warragamba Dam, Warragamba, NSW 2752
Local govt. area: Wollondilly
Local Aboriginal Land Council: Tharawal
Property description
Lot/Volume CodeLot/Volume NumberSection NumberPlan/Folio CodePlan/Folio Number
LOT5 DP1055236
LOT6 DP1055236
LOT8 DP1055236
LOT1124 DP1159978
All addresses
Street AddressSuburb/townLGAParishCountyType
Warragamba DamWarragambaWollondilly  Primary Address

Owner/s

Organisation NameOwner CategoryDate Ownership Updated
Water NSWState Government 

Statement of significance:

Megarritys Bridge is considered to be of high significance as it serves the function of carrying the major Warragamba pipeline across Megarritys Creek. It is historically associated with the Warragamba Emergency Scheme, and at the time of construction, was one of the largest concrete arch bridges to be built in NSW. It is a unique item of engineering heritage as its design is based on an innovative 'bow string' arch design rather than the more common 'decked' arch design.
Date significance updated: 22 Mar 01
Note: The State Heritage Inventory provides information about heritage items listed by local and State government agencies. The State Heritage Inventory is continually being updated by local and State agencies as new information becomes available. Read the OEH copyright and disclaimer.

Description

Builder/Maker: METROPOLITAN WATER, SEWERAGE AND DRAINAGE BOARD
Physical description: The construction incoporated an arch formwork design using tubular steel scaffolding. It is believed that this was the first instance in NSW of the use of this material for such load carrying purposes.
Modifications and dates: Substantially as designed, but with an increase in height of the crest of 5.1m with post tensioning anchors undertaken in 1989 as part of interim flood mitigation works.
Further information: National Trust (NSW) Listing, January 1989, Clive Lucas Stapleton with John Collocott, Warragamba Dam Conservation Analysis and Management Guidelines for items of European Cultural Significance, 1994; McGlynn, JE 'The Warragamba Emergency Scheme 1937-1940', historical research section, 'Warragamba Dam Operations Manual', Water Board, Vols 1 & 2, 16 June, 1993
Current use: bridge
Former use: (Gundungurra) traditional lands, squatting, farming, timber getting, bridge

History

Historical notes: Upper Nepean Scheme:
The Upper Nepean Scheme was commenced in 1880 after supply from the Botany Swamps became insufficient to meet Sydney's growing water supply needs. The Upper Nepean Scheme was based on the diversion of the waters of four rivers, the Cataract, Cordeaux, Avon and Nepean, into a series of tunnels, canals and pipelines, collectively known as the Upper Canal, to be conveyed for storage in Prospect Reservoir, from which supply to Sydney was drawn.

By 1902, however, the water supply was found to be inadequate and a Royal Commission was held which recommended impounding the waters of the Cataract River by means of a major storage dam. The Cataract Dam was completed in 1907. In November 1918, a Board of Experts was appointed by the Government to draw up recommendations for the amplification of the Sydney water supply. It was upon the recommendations of this body, as approved by the Public Works Committee of the NSW Parliament, that not only Cordeaux, but also Avon and Nepean Dams were built. The Cordeaux Dam was completed in 1926 and the Avon Dam in 1927, on the Cordeaux and Avon Rivers respectively. As Cordeaux and Avon Dams were approaching completion, a fourth dam, Nepean Dam, was commenced in 1925 (Hannam, 2016, 16).

Megarrity's Creek Bridge:
Megarritys Creek Bridge is a concrete arch bridge spanning Megarritys Creek. The construction of the bridge provided a vital link across the Creek for the operation of the Warragamba Emergency Scheme. While it was designed eventually to carry the No 1 106" outlet main from Warragamba Dam, for the Emergency Scheme it carried the 48" main from the weir to Prospect Reservoir.

Historic themes

Australian theme (abbrev)New South Wales themeLocal theme
1. Environment-Tracing the evolution of a continent's special environments Environment - naturally evolved-Activities associated with the physical surroundings that support human life and influence or shape human cultures. Cultural: Rivers and water bodies important to humans-
1. Environment-Tracing the evolution of a continent's special environments Environment - naturally evolved-Activities associated with the physical surroundings that support human life and influence or shape human cultures. Changing the environment-
3. Economy-Developing local, regional and national economies Environment - cultural landscape-Activities associated with the interactions between humans, human societies and the shaping of their physical surroundings Landscapes of institutions - productive and ornamental-
3. Economy-Developing local, regional and national economies Environment - cultural landscape-Activities associated with the interactions between humans, human societies and the shaping of their physical surroundings Landscapes and parklands of distinctive styles-
3. Economy-Developing local, regional and national economies Events-Activities and processes that mark the consequences of natural and cultural occurences Developing local landmarks-
3. Economy-Developing local, regional and national economies Technology-Activities and processes associated with the knowledge or use of mechanical arts and applied sciences Technologies of bridge building-
3. Economy-Developing local, regional and national economies Technology-Activities and processes associated with the knowledge or use of mechanical arts and applied sciences Technologies for reticulated water supply-
3. Economy-Developing local, regional and national economies Transport-Activities associated with the moving of people and goods from one place to another, and systems for the provision of such movements Bridging rivers-
4. Settlement-Building settlements, towns and cities Utilities-Activities associated with the provision of services, especially on a communal basis Water and drainage-
4. Settlement-Building settlements, towns and cities Utilities-Activities associated with the provision of services, especially on a communal basis Providing drinking water-
7. Governing-Governing Government and Administration-Activities associated with the governance of local areas, regions, the State and the nation, and the administration of public programs - includes both principled and corrupt activities. State government-
7. Governing-Governing Government and Administration-Activities associated with the governance of local areas, regions, the State and the nation, and the administration of public programs - includes both principled and corrupt activities. Developing roles for government - administration of land-
7. Governing-Governing Government and Administration-Activities associated with the governance of local areas, regions, the State and the nation, and the administration of public programs - includes both principled and corrupt activities. Developing roles for government - building and operating public infrastructure-
7. Governing-Governing Government and Administration-Activities associated with the governance of local areas, regions, the State and the nation, and the administration of public programs - includes both principled and corrupt activities. Developing roles for government - conserving cultural and natural heritage-
7. Governing-Governing Government and Administration-Activities associated with the governance of local areas, regions, the State and the nation, and the administration of public programs - includes both principled and corrupt activities. Developing roles for government - providing reticulated water-

Assessment of significance

SHR Criteria f)
[Rarity]
This item is assessed as historically rare statewide. This item is assessed as scientifically rare statewide.
Assessment criteria: Items are assessed against the PDF State Heritage Register (SHR) Criteria to determine the level of significance. Refer to the Listings below for the level of statutory protection.

Recommended management:

Recommendations

Management CategoryDescriptionDate Updated
Recommended ManagementProduce a Conservation Management Plan (CMP) 
Recommended ManagementPrepare a maintenance schedule or guidelines 
Recommended ManagementCarry out interpretation, promotion and/or education 

Procedures /Exemptions

Section of actDescriptionTitleCommentsAction date
57(2)Exemption to allow workStandard Exemptions SCHEDULE OF STANDARD EXEMPTIONS
HERITAGE ACT 1977
Notice of Order Under Section 57 (2) of the Heritage Act 1977

I, the Minister for Planning, pursuant to subsection 57(2) of the Heritage Act 1977, on the recommendation of the Heritage Council of New South Wales, do by this Order:

1. revoke the Schedule of Exemptions to subsection 57(1) of the Heritage Act made under subsection 57(2) and published in the Government Gazette on 22 February 2008; and

2. grant standard exemptions from subsection 57(1) of the Heritage Act 1977, described in the Schedule attached.

FRANK SARTOR
Minister for Planning
Sydney, 11 July 2008

To view the schedule click on the Standard Exemptions for Works Requiring Heritage Council Approval link below.
Sep 5 2008

PDF Standard exemptions for works requiring Heritage Council approval

Listings

Heritage ListingListing TitleListing NumberGazette DateGazette NumberGazette Page
Heritage Act - State Heritage Register 0136718 Nov 99   
Heritage Act - s.170 NSW State agency heritage register 465194   
Local Environmental Plan     
National Trust of Australia register      
Within a National Trust conservation area     

Study details

TitleYearNumberAuthorInspected byGuidelines used
Sydney Water Heritage Study1996465194Graham Brooks and Associates Pty Ltd1 JULY 1996 Yes

References, internet links & images

TypeAuthorYearTitleInternet Links
WrittenHannam, Peter2016'Controversial South32 mine wins nod - Mining: concerns for groundwater'

Note: internet links may be to web pages, documents or images.

rez
(Click on thumbnail for full size image and image details)

Data source

The information for this entry comes from the following source:
Name: Heritage Office
Database number: 5051476
File number: 465194


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