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Mount Stromlo Observatory, largely razed to the ground in Canberra's 2003 bushfires, has seen existing facades restored and a contemporary addition take centre stage

View of the observatory prior to renovations after ecoregion, geological phenomenon, landscape, painting, rural area, wildfire, brown
View of the observatory prior to renovations after it had been damaged by fire.

A classic renovation project is often well served by a bold, contemporary insertion. Restored traditional meets the strikingly new in this comprehensive rethink of the Mount Stromlo Observatory, home to the Research School of Astronomy and Astrophysics and part of the Australian National University.

The bushfires that devastated Canberra in January 2003 swept across Mount Stromlo, causing widespread destruction to the school's facilities. This included a number of historic telescopes and buildings. The observatory, established in the 1920s, is significant due to the history of scientific research undertaken on the site, and the fact that it is one of the oldest federal institutions in the ACT.

Following completion of a detailed conservation management plan for the whole observatory and its curtilage, Tanner Architects was commissioned for the reconstruction of the central Commonwealth Solar Observatory (CSO) Building. Robert Denton was project architect on the substantial undertaking.

"The CSO Building was originally designed by federal architect JS Murdoch and constructed in stages from 1925 through to 1940," says Denton. "The building consists of a series of pavilions arranged around two courtyards and joined by covered walkways. The bushfire almost completely destroyed the original building only the masonry walls and telescope domes were left standing."


Exterior view of the observatory which features steel architecture, corporate headquarters, elevation, estate, facade, home, house, property, real estate, roof, sky, window, blue, purple
Exterior view of the observatory which features steel and tiled roofing, cladding, glazing, glass doors and windows, paving, lighting.

A primary concept in the building's adaptive reuse was to restore the exterior to its general appearance before the fires, while providing contemporary, open and light-filled interior spaces suitable for the school's administrative and business functions. Where original walls were not reinstated in the reception pavilion and common room they are represented by contrasting timber floor elements that follow the original outline.

"The reconfigured building interior includes a generous reception area, office areas, meeting rooms, high technology resource library, amenities and a large common room," says Denton. "The once dark and cramped basement area was opened up through the provision of a new void and glazed stair wrapping around the original Sun telescope shaft, connecting the library areas with generous levels of natural light."

In addition, the CSO building was fully upgraded to meet current building codes, standards, accessibility requirements and bushfire protection. The building was provided with energy- and water-efficient services, rain water collection and discreet external sunshading.

"An important aspect of the project was the provision of a new and contemporary common room facility, taking advantage of expansive valley views and orientation," says the architect. "The common room replaces the original central north pavilion, which had been constructed as an expedient back-of-house structure with little consideration for maximising views to the mountain scenery, such as the modern structure affords."

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View of architectural plans.

The new addition has a prominent form, with an expressive roof, but does not dominate the existing telescope towers or the original building's presentation.

"The openness of the structure distinguishes it from the unaltered components, but integrates with the existing building through its symmetrical design and the use of common materials," says Denton. "This insertion provides a new focus for the school that is a further positive step from the devastation of the fire, and at the same time acknowledges the fire as an important event in the history of the building.

"The adaptive reuse has breathed life back into this important building, returning it to the administrative and social heart of the observatory, and reinstated the iconic status of the Mount Stromlo Observatory."

Credit list

Architect
Robert Denton AIA and Ian Burgher, Tanner Architects; project team, Karen Urquhart, Christina Rangel, Anna Moldt
Heritage architects
Scott MacArthur, Megan Jones,
Project co-ordinator
ANU Facilities and Services
Construction
GE Shaw and Associates
Quantity surveyor
Rider Hunt
Building regulations consultant
BCA Solutions
Roofing
CSR Wunderlich Marselle terra cotta roof tiles in Cottage Red; BlueScope Steel Kliploc 700 Monoclad and custom Orb
Floors
Select-grade messmate timber; recycled turpentine insets
Windows and doors
Lidco Heritage suite windows; Capral framing from Alspec Hawkesbury; bifold doors
Office furniture
Corporate Express
Pergolas and sunshades
Aluminium grating by Hi-Light Industries
Interior designer
Christina Mitkovski, Eloise Fotheringham,
Conservation management plan
Megan Jones, Jodie Ayres, Scott MacArthur, Tanner Architects
Environmentally sustainable design
Hyder Consulting
Civil, mechanical and electrical engineer
Hyder Consulting
Landscaping
ANU Facilities and Services
Cladding
Alucobond fascias
Facade
Pebble dash and smooth render
Lighting
Office lighting by Philips; external lighting by Pierlite
Wallcoverings
CSR Gyprock plasterboard
Drapes and blinds
Luxaflex

Story by: Charles Moxham

08 Jul, 2009

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