Falls Creek Alpine Resort – Mapping & Condition Assessment of the Sewer System

The Falls Creek Alpine Resort Management Board is responsible for the management, development and promotion of the Falls Creek Alpine Resort.


Mapping & Condition Assessment of the Sewer System

Background

The Falls Creek Alpine Resort Management Board is responsible for the management, development and promotion of the Falls Creek Alpine Resort.

The Falls Creek sewer system has been progressively developed since the resort was established in the 1950’s and existing documents regarding the location and extents of the system are incomplete and have been poorly maintained.

Objective

The main requirements of the project were to:

  • Locate, document and map all of the reticulated sewer network.
  • Perform a detailed condition assessment of the network.
  • Develop a maintenance and upgrade program.

RapidMap was responsible for delivery of item 1 above, while our project partner, Veolia Water Network Services, delivered the services required to complete items 2 and 3. (The network condition assessment was carried out using CCTV).

Falls Creek Sewer System

The sewer system consists of approximately 3km of PVC mains and over 150 concrete manholes. The system is predominantly gravity based at terminates on site at treatment facility. The majority of the system is constructed of 150mm PVC with a short section of 200mm PVC prior to the inflow of the treatment plant. At the top end of the system there are also several short runs of 100mm PVC connecting the uppermost sites in the village.

At this time there is known to be several manholes that have been covered under roadways and possibly in other areas.

Project

The project included mapping the location of all sewer mains within the Resort including the dimensions of pipes, pits, junctions, in-flow pipes, out-flow pipes and other infrastructure, assessing the condition of the sewer infrastructure, and developing a sewer mains maintenance and replacement schedule.

Detailed information collected included:

  • Pit locations, types, dimensions and invert levels
  • Pipe locations, types, dimensions, and invert levels
  • All points where pipes changes direction and/or dimension
  • Rising main locations, dimensions, invert levels and pump details
  • Junctions to site sewer pipes and dimensions of in-flow pipes; and
    Location and details of any other sewer mains infrastructure.

Many sewer related assets could only be located after extensive searching, the final dataset included full details of many manholes that had been covered over for many years.

Deliverables

The project deliverables included the following outputs to FCRM:

  • Digital files in MapInfo format compatible with existing GIS data
  • Pipe types, locations, dimensions, invert levels and all points where pipes changes direction and/or dimension
  • Pit types, locations, dimensions and invert levels
  • Rising main locations, dimensions, invert levels and pump details
  • Junctions to site sewer pipes and dimensions of in-flow pipes
  • Location and details of any other sewer mains infrastructure.
  • A hardcopy of all digital information in a format accessible by FCRM;
  • An assessment in hardcopy and electronic copy of the condition of all sewer mains infrastructure including pipes, pits, pit seals, pit lids, rising mains, junctions, and pumps in a format accessible by FCRM
  • An assessment in hardcopy and electronic copy of a proposed maintenance and replacement schedule for all sewer mains infrastructure in a format accessible by FCRM.

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