Ecological Assessment Report Water to Grade Pipeline Corridor Investigations Lot 6CP Santos

Transcription

1 Ecological Assessment Report Water to Grade Pipeline Corridor Investigations Lot 6CP Santos Report ref: June 2011 Revision 0

2 Document prepared by: Aurecon Australia Pty Ltd ABN Turbot Street Brisbane Queensland 4000 Australia T: F: E: brisbane@ap.aurecongroup.com W: aurecongroup.com Document control Document ID: _Santos_Fairview_Ecological Assessment_LOT_6 CP908635_ doc Rev No Date Revision details Typist Author Verifier Approver 0 10 June 2011 Final DPe DPe GAP JS A person using Aurecon documents or data accepts the risk of: a) Using the documents or data in electronic form without requesting and checking them for accuracy against the original hard copy version. b) Using the documents or data for any purpose not agreed to in writing by Aurecon. This document is solely for the purposes of an ecological assessment and does not provide any legal advice regarding development locations and/or activities

3 Contents 1. Background Project Description Purpose of Report 1 2. Methodology Desktop Methodology Field Methodology 3 3. Ecological Assessment Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Corridor F Road Corridor Corridor Powerline Corridor Powerline Corridor FV 93 Access Road Other Survey Area Summary Conclusion References 49 Appendix A Botanical Species List Page i

4 1. Background 1.1 Project Description Santos Ltd (Santos) have commissioned Aurecon Australia Pty Ltd (Aurecon) to conduct an ecological investigation of areas proposed for the construction of multiple water to grade pipelines within the Fairview gas fields. The Fairview gas fields are centred around the Injune area and are characterised by elevated sandstone ranges including the Carnarvon and Expedition Ranges and part of the Mount Hutton and Kongabula Ranges. The Dawson River and other smaller watercourses drain this area and the vegetation is dominated by Eucalyptus and White Cypress Pine woodland, Brigalow and Semievergreen Vine Thicket (Eddie, 2007). Much of this area has been subjected to cattle grazing and other agricultural practices as well as previous development associated with the gas fields. Santos have identified proposed corridors to allow for the construction of water to grade pipelines to transport water from existing gas wells. Aurecon has undertaken desktop and on-ground ecological assessments of the proposed pipeline corridors to identify any environmental constraints associated with the area. Numerous pipeline corridors are planned and this report addresses those corridors surveyed on Lot 6 CP The surveys have been conducted over variable seasons, with the first surveys occurring in March 2011 and the remaining surveys in late May Figure 1-1 below shows the corridors that were surveyed. 1.2 Purpose of Report The purpose of this report is to provide an ecological assessment of the proposed development area and identify potential ecological constraints to the development. Page 1

5 Figure 1-1 Location of proposed pipeline corridors investigated Page 2

6 2. Methodology 2.1 Desktop Methodology Areas of development have been projected on various maps as provided by Santos. These maps include Regional Ecosystem (RE) mapping, Environmentally Sensitive Areas (ESA) mapping, drainage mapping and aerial photography. Where available ahead of time, these resources were reviewed to determine areas of focus for the field inspection. It is important to note that throughout this report areas of remnant vegetation are referred to as endangered, of concern and no concern at present regional ecosystems. The classification used for this report is based on the biodiversity status of the vegetation not the Vegetation Management Act status of the vegetation. This is important as some areas mapped on the RE mapping (which used the VMA status) are categorised as of concern but are referred to in this report as endangered. 2.2 Field Methodology The proposed corridors were inspected by four (4) Aurecon ecologists (Vanessa Boettcher, Luke Foster, Grant Paterson and Dan Pedersen) on the week 23-29th March The inspections aimed to assess the existing vegetation communities and habitat value of the proposed clearing within the pipeline corridors as well as verifying regional ecosystem (RE) mapping as produced by the Department of Environment and Resource Management (DERM). GIS layers of the proposed corridor locations and environmental constraints mapping (eg Regional Ecosystem Mapping, Ecologically Significant Area Mapping) and high resolution aerial photography were uploaded onto a toughbook (C5 mobile clinical assistant CFT-001 Motion computing) with an integrated GPS to facilitate the detection of boundaries whilst traversing the site. A handheld Garmin GPS (GPSmap 76) was also used in the inspection. The flow line corridors and power line corridors were up to 100 m wide and of varying lengths. The ground-truthing of these corridors included undertaking detailed flora species observations including sampling of unknown flora. All flora species known to be of conservation significance (such as endangered, vulnerable, near threatened or Type A species under the Nature Conservation Act 1992 or endangered, vulnerable or rare species under the Environment Protection and Biodiversity Conservation Act 1999) were recorded by GPS. Fauna observations were also recorded during the inspections. A complete list of flora species observed in the flow line assessment in each season has been included in Appendix A. Page 3

7 3. Ecological Assessment 3.1 Corridor F1 General Corridor F1 is predominantly located in non-remnant vegetation on the RE mapping with the exception of a small section of mapped no concern at present RE (see Figure 3-1 below). The corridor occurs approximately 25 m from the edge of mapped endangered RE which is a Semi Evergreen Vine Thicket. This RE is mapped correctly and therefore the proposed corridor occurs 25 m from the edge of a Category B ESA. Areas of Semi Evergreen Vine Thicket are also protected under the EPBC Act. Two low level (stream order 1) watercourses are crossed within the proposed corridor footprint. Figure 3-1 Aerial photograph of proposed corridor F1 overlaid with RE mapping Page 4

8 Floristics The pipeline corridor occurs predominantly in cleared non-remnant vegetation dominated by Buffel Grass (Pennisetum ciliare) and other exotic grasses and forbs. The area at the western end of the corridor mapped as remnant vegetation is correctly mapped and is a Eucalypt woodland dominated by Narrow Leaved Ironbark(Eucalyptus crebra) with associated Silver Leaved Ironbark (Eucalyptus melanophloia), White Cypress Pine (Callitris glaucophylla) and Smooth Barked Apple (Angophora leiocarpa). The watercourse within the remnant vegetation was comprised of the same vegetation with additional scattered Blue Gum (Eucalyptus tereticornis). Seven (7) Kurrajong (Brachychiton populneus) trees were observed along the corridor. All species of the genus Brachychiton are Type A restricted plants under the NC Act. The locations of these species have been outlined in Table 3-1 below and are depicted in Figure 3-1 below. No other species of conservation significance under the NC Act or EPBC Act were observed within the proposed corridor. Table 3-1 Species of conservation significance for Corridor F3 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Habitat values The habitat values of corridor F1 are very high in the area of remnant vegetation and low in the adjoining cleared land. The remnant vegetation area had an intact canopy with a shrubby mid storey and was not dominated by exotic species. Multiple bird calls were heard during the inspection and Double Bar Finches (Taeniopygia bichenovii) were observed. Another unidentified Finch species was also observed as well as multiple small bird nests. A Monarch Butterfly was observed in along the drainage line. Macropods scats were also noted along the entire length of the corridor. The area of cleared vegetation was mainly dominated by Buffel grass and had very little woody vegetation cover. This area is considered to be of low habitat value and is not a primary foraging or nesting habitat. Page 5

9 3.2 Corridor F2 General Corridor F2 is a very small corridor approximately 215 m in length. The area is located almost entirely in heavily disturbed non-remnant vegetation with the exception of a small area (0.026 ha) of mapped remnant vegetation (see Figure 3-2 below). This corridor is traversed by two major access tracks and an existing well pad. The area is not located within any areas mapped as ESA and is located approximately 270 m from an area mapped as endangered RE which is also a Category B ESA. Figure 3-2 Aerial photograph of corridor F2 Floristics The proposed corridor is mostly devoid of woody vegetation and is dominated by Buffel Grass and other exotic grasses and forbs. The south-eastern edge of the corridor is mapped as remnant vegetation no concern at present RE which extends 13 m into the corridor footprint. There is vegetation present in this area however it is disturbed and is does not have the canopy cover of intact remnant RE Therefore as the RE mapping is only accurate to +/- 75 m, it is likely that this is a mapping scale issue and the remnant vegetation does not extend into the corridor. Page 6

10 Habitat values The habitat values of corridor F2 are very limited due to the highly disturbed nature of the corridor and the lack of mature native vegetation. No fauna were observed during the inspection. Page 7

11 3.3 Corridor F3 Corridor F3 is currently mapped by DERM as occurring within both non-remnant and remnant vegetation. The areas mapped as remnant vegetation consist of REs and which are endangered and no concern at present, respectively. Recent field investigations have resulted in confirmation of RE map accuracy. RE is a Semi Evergreen Vine Thicket (SEVT) community which is listed as endangered by both Queensland and Commonwealth legislation. Due to the presence of the endangered SEVT, the corridor occurs within and adjacent to areas classed as a Category B Environmentally Sensitive Area (ESA). Land clearing and current grazing practices have resulted in the non-remnant status of the remaining vegetation within this corridor. Multiple watercourses (classified DERM as stream orders 1, 2 and 3) bisect the proposed corridor. A major access road and pre-existing track traverse the southern side of the corridor (Figure 3-3 below). Figure 3-3 Aerial photograph and associated RE mapping of proposed corridor F3 Floristics As discussed, the proposed corridor occurs in areas mapped by DERM as remnant and non-remnant vegetation. Within the mapped remnant vegetation, both a Eucalypt community and SEVT have been identified. Page 8

12 The Eucalypt community is dominated by Silver-leaved ironbark (Eucalyptus melanophloia) and Narrow-leaved ironbark (Eucalyptus crebra) with a shrubby understorey and less dominance of Buffel grass (Cenchrus ciliaris) in the ground layer than other, cleared areas on site. The SEVT community (which is analogous to RE ) consists of a diverse range of rainforest species, including multiple Type A restricted species. These species have not been recorded due to the inaccessibility of the steep slope. Two Type A restricted species, namely Kurrajong (Brachychiton populneus) and Narrow-leaved bottle tree (Brachychiton rupestris) were observed on the edge of the SEVT community, within the no concern at present RE and its location has been identified in Table 3-2 below. Table 3-2 Species of conservation significance for Corridor F3 Species name Common name Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton populneus Kurrajong Brachychiton rupestris Narrow-leaved bottle tree The non-remnant areas of the corridor are located on land which has been historically cleared for agricultural purposes, and is presently utilised as grazing land for cattle. There are few mature trees within these areas, and the dense ground layer is dominated by Buffel grass. Habitat values The habitat values of corridor F3 are relatively high within the areas of the remnant vegetation. The remnant vegetation has an intact canopy with a diverse mid-storey and ground layer dominated by native flora species. The remnant vegetation area also contains SEVT which is a dense, diverse vegetation community with a very high habitat value for insect, avian, reptile, and mammalian fauna. Multiple bird nests were observed within the remnant vegetation. Brown Quails (Coturnix ypsilophora), Red Backed Fairy-Wrens (Malurus melanocephalus) and a Tommy Round Head lizard (Diporiphora australis) were observed during field investigations, and a diverse array of bird calls were heard. Macropod scats were also recorded. The areas of non-remnant vegetation have a low-moderate habitat value due to the lack significant mature vegetation and dominance of Buffel grass and other non-native species. The habitat value is increased by the presence of watercourses of moderate size with sparse fringing riparian vegetation. A high amount of woody debris was also observed within the cleared areas. Double Barred Finches (Taeniopygia bichenovii) were heard in the area but no other fauna were observed. Due to its close proximity to remnant vegetation, it is likely that the non-remnant areas within the corridor are utilised as stepping stones for highly mobile species, and may be utilised by more disturbance tolerant species for foraging. Page 9

13 3.4 Corridor F11 General Proposed corridor F11 is very short and is approximately 215 m long. The corridor is located entirely in remnant vegetation on the RE mapping including RE s and (see Figure 3-4 below) RE is an endangered Semi Evergreen Vine Thicket RE and is also listed under the EPBC Act. RE is a no concern at present RE. Due to the presence of the endangered vegetation, the corridor also occurs within a Category B ESA. A significant portion of the proposed corridor has been heavily disturbed by access track and an existing well pad. No watercourses occur in or within close proximity to the proposed corridor. Floristics Figure 3-4 Aerial Photograph of corridor F11 with overlaid RE Mapping Despite being mapped as remnant vegetation, a significant portion of the proposed corridor is heavily disturbed and/or cleared due to access tracks and an existing well pad (see Figure 3-4 above ). The dominant vegetation is Buffel Grass (Pennisetum ciliare) and Rhodes Grass (Chloris gayana) in the disturbed areas and very little woody vegetation. Page 10

14 The northern section of the corridor (which overlaps with Corridor F3) does occur in semi evergreen vine thicket (SEVT) RE which has been correctly mapped. This area is comprised of dense rainforest vegetation on steep slopes. SEVT is endangered under Queensland legislation and listed as a threatened ecological community under the Commonwealth EPBC Act. Habitat Values The habitat value of the existing well pad area is very limited due to the highly disturbed nature of the site and lack of mature vegetation. No fauna or evidence of fauna were observed in this area during the inspection. The northern area of the corridor in the SEVT vegetation has a very high habitat value due to the presence of an intact regional ecosystem with a complex vegetation structure. Multiple bird calls were heard in the area and Brown Quails (Coturnix ypsilophora) and Red Backed Fairy-Wrens (Malurus melanocephalus) were observed. No EVNT fauna species were observed in the corridor. Page 11

15 3.5 Corridor F12 General Corridor F12 was presented in week 1 report (5 April 2011). The proposed area of disturbance is currently mapped as non remnant on the Department of Environment and Resource Management (DERM) Regional Ecosystem (RE) Mapping. The area does not occur in any areas identified as ESA s and the nearest ESA to the corridor is approximately 800 m to the north-west. The corridor does not occur across any watercourses or in close proximity to any watercourses. The nearest watercourse is approximately 400 m to the east. An existing cleared well pad is located at the southern end of the corridor. Figure 3-5 Aerial photograph of corridor F12 Floristics The corridor footprint is characterised by previously cleared land with predominantly Eucalyptus regrowth. The majority of woody vegetation was less than 5 m tall and sparsely distributed. Ground cover was very dense and dominated by Buffel grass. The species diversity at this site would be considered moderate although a large percentage of the species were exotic. No species of conservation significance under the provisions of the NC Act and/or the EPBC Act were observed within the area proposed for disturbance. Page 12

16 Habitat values The habitat values of corridor F12 are limited due to previous disturbance and the high level of exposure due to the sparse woody vegetation. Regrowth Eucalypt vegetation would offer temporary shelter however the area is not likely to be optimal habitat for native fauna. The dominance of Buffel grass is also likely to limit the use of the area by native fauna. Page 13

17 3.6 Corridor F26 General Corridor F26 was presented in week 1 report (5 April 2011). The proposed area of disturbance is mapped predominantly as non-remnant vegetation on the RE mapping (see Figure 3-6 below). A small area on the western end of the corridor is mapped as remnant / The extent of this remnant vegetation is incorrect as the vegetation has been cleared and the area is mostly regrowth. There is a small section which is remnant vegetation and occurs within the corridor. This has been highlighted on Figure 3-6 below. The status of the vegetation is discussed below. The area is mapped as being within a Category C ESA due to the mapped remnant of concern vegetation. This is addressed below. A stream order 1 watercourse traverses the corridor at the western end (see Figure 3-6 below). Page 14

18 Figure 3-6 Aerial Photograph of corridor F26 with overlaid RE Mapping Floristics The proposed pipeline corridor is mainly regrowth eucalypt species with a dense ground layer of native and exotic grasses and forbs. The area is relatively high in species richness and Buffel grass has not dominated as in other areas. The area which is presently mapped as remnant / is currently regrowth vegetation comprising mainly of Eucalyptus decorticans and Acacia leiocalyx. These species are not analogous to the species of either or which are predominantly Eucalyptus melanophloia +/- E. chloroclada for and E. populnea for In addition, the area is also not a Landzone 3 area due to its undulating nature and elevated position in the landscape. There area is a Landzone 10 due to the soils and geology of the area and its position in the landscape. Therefore, based on the species present and the Landzone the correct RE is most likely which is a no concern at present RE. A juvenile Brachychiton sp. was located within the pipeline corridor. All Brachychiton species are Type A restricted plant under the NC Act. The location of the juvenile Brachychiton has been identified in Table 3-3 below. No other species protected under the NC Act or EPBC Act were observed in the pipeline corridor. Page 15

19 Table 3-3 Species of conservation significance for Corridor F26 Species Easting Northing (GDA 94, Zone 55J) (GDA 94, Zone 55J) Brachychiton sp The watercourse present at the western end of the corridor is a minor drainage depression and does not contain mature riparian vegetation. The drainage line is consistent with the vegetation of the surrounding area. Habitat Values The habitat values of pipeline F26 are limited due to the level of disturbance and previous clearing at the site. There are no mature trees with the majority of the woody vegetation being less than 4 m in height. Very little woody debris was observed which further limits the potential habitat value. No fauna were observed during the field inspection Page 16

20 3.7 Corridor F33 General Corridor F33 was presented in week 1 report (5 April 2011). Corridor F33 is mapped as non-remnant vegetation on the DERM RE mapping. The area has been cleared for grazing purposes and is currently used by stock. A no concern at present remnant RE is located immediately to the west of the corridor. There are no ESA s mapped within the corridor footprint and no watercourses traverse the clearing area. A low order watercourse (stream order 1) occurs at the northern edge of the corridor however no riparian vegetation is located within the corridor. Another stream order 1 watercourse occurs approximately 80 m east of the corridor (see Figure 3-7 below). Figure 3-7 Aerial Photograph of proposed corridor F33 with overlaid RE Mapping Floristics The area of disturbance for corridor F33 is cleared land and consists of regrowth vegetation with multiple retained mature Brachychiton species. Ground cover was dominated by Buffel grass and other exotic species and the area was heavily grazed. Page 17

21 A total of 19 Brachychiton plants were observed and their locations are outlined in Table 3-4 below. The other species predominant at the site were regrowth Eucalyptus melanophloia, E. populnea, Atalaya hemiglauca and Eremophila mitchellii. Table 3-4 Species of conservation significance for Corridor F33 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris (four at this location) Brachychiton rupestris Brachychiton rupestris All species of the genus Brachychiton are declared as Type A restricted plants under the NC Act. No species protected under the EPBC Act were observed in the proposed corridor. Habitat Values The habitat values of corridor F33 are low to moderate. Scattered mature trees are present within the area which provides shelter and some fallen woody debris. The area is highly disturbed due to grazing and apart from the Brachychiton species, all other woody vegetation is limited to regrowth. A Tommy Round Head (Diporiphora australis) and a Double Barred Finch (Taeniopygia bichenovii) were observed during the field inspection to be present in the pipeline corridor. Page 18

22 3.8 Corridor F41 General Corridor F41 was presented in week 1 report (5 April 2011). This is summarised below. Corridor F41 is a very long pipeline corridor (approximately 8 km) and as such occurs through a variety of vegetation changes. Approximately 1.8 km occurs on Lot 6CP The majority of the pipeline corridor is mapped as non-remnant vegetation except for two areas mapped as RE / which are described as Spotted Gum (Corymbia citriodora) open forest and Eucalypt/Corymbia open forest. These areas are approximately 700m and 150m in length and not on Lot 6CP (see Figure 3-8 below). The corridor on Lot 6CP occurs in eucalypt plantation for the majority and some remnant vegetation does intersect the assessment area. Remnant vegetation surrounding the assessment location is mapped as: Not of Concern RE / a (90/10). No mapped watercourses occur within the corridor, however multiple low order watercourses occur in close proximity to the corridor (see Figure 3-8 below). Page 19

23 Figure 3-8 Aerial image of proposed corridor F41 overlaid with RE mapping Florisitics The area of disturbance occurs in both remnant and non-remnant vegetation. Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus fibrosa, E. decorticans, Corymbia clarksoniana) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was shrubby/grassy throughout. Therefore the mapped RE is a suitable descriptor for that remnant. The non-remnant vegetation along the corridor is characterised by Chinchilla White Gum eucalyptus plantation. Page 20

24 Habitat Values The habitat values on this corridor were significant. The remnant vegetation had good biodiversity for foraging and a lot of fallen timber and hollows. To the north of the corridor there was a low escarpment which would provide habitat diversity. The remnant area within the pipeline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. The areas of non-remnant vegetation had limited biodiversity and low habitat value. Page 21

25 3.9 Corridor F163 This corridor extends from Lot 20WT32 into Lot 6CP and Lot 8AB200. The data for this corridor is presented in the assessment report for Lot 20WT32. Figure 3-9 Aerial image of proposed corridor F163 overlaid with RE mapping This corridor is located within cleared lands and no remnant vegetation is mapped within the corridor. The whole corridor is within land mapped as ESA category B. One Brachychiton rupestris was observed and their locations are outlined in Table 3-5 below. Table 3-5 Species of conservation significance for Corridor F33 Species Easting Northing (GDA 94, Zone 55J) (GDA 94, Zone 55J) Brachychiton rupestris Page 22

26 3.10 Corridor F213 General F213 was surveyed 31 May The corridor is mapped as remnant vegetation RE / and non-remnant vegetation. The whole corridor is within land mapped as ESA category B. The mapping is determined correct. Not of Concern RE / a (90/10). Figure 3-10 Aerial photograph of proposed corridor F163 with overlaid RE mapping and notable species. Floristics The area of disturbance occurs in both remnant and non-remnant vegetation. Page 23

27 Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus fibrosa, E. decorticans, Corymbia clarksoniana) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was shrubby/grassy throughout. Therefore the mapped RE is a suitable descriptor for that remnant. This corridor contained 5 individual Type A restricted plants under the NC Act, Brachychiton rupestris. The GPS locations of these are provided in Table 3-6 below. Table 3-6 Species Species of conservation significance corridor F213 Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris Brachychiton rupestris Habitat Values The habitat values on the remnant vegetation of this corridor were significant. The remnant vegetation had good biodiversity for foraging and a lot of fallen timber and hollows. To the north of the corridor there was a low escarpment which would provide habitat diversity. The remnant area within the pipeline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. The areas of non-remnant vegetation had limited biodiversity and low habitat value. Page 24

28 3.11 Corridor F233 General The F233 is a 100 m wide corridor, which extends south from TP F142 to the boundary with Lot 8AB200. TP F141, TP F134 and TP F140 have been assessed within this corridor. This corridor is located on cleared land adjacent to the access road. The northern portion of the corridor is within land mapped as ESA category B. The vegetation was largely grass land with very little woody vegetation, having scattered Acacia regrowth. There were some small patches of remnant vegetation, particularly at the southern portion of the corridor within this Lot and at TP-134. The Dawson River is located as close as 100m to the proposed development area within Lot 6CP Vegetation surrounding the assessment location is mapped as (see Figure 3-11 below): Not of Concern RE The areas of remnant vegetation mapped are considered to be correct. Page 25

29 Figure 3-11 Aerial photograph of proposed corridor F233 with overlaid RE mapping and notable species. Floristics The area of disturbance occurs in both remnant and non-remnant vegetation. The non-remnant vegetation along the corridor is characterised by sparse regrowth amongst Buffel grass (Pennisetum ciliare) dominated grassland (estimated up to 90%) with little woody vegetation. Regrowth includes scattered Eucalypts, Acacia, Wilga and false Sandalwood. Shrubs are scattered throughout the grasslands. Within the remnant vegetation patches, the predominant vegetation is Eucalyptus species (Eucalyptus populnea, E. chloroclada, E. melanophloia and Corymbia tessellaris). The mid stratum was predominantly Acacia and Wilga. The ground cover was grassy throughout. Page 26

30 Two species of conservation significance were located within the proposed corridor footprint. Brachychiton populneus (Kurrajong) and Brachychiton rupestris were located within the 100m corridor footprint. The details of their locations are in Table 3-7 below. Table 3-7 Species of conservation significance in F233 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton australis Brachychiton populneus Brachychiton rupestris Habitat Values The habitat values over the majority of the corridor F233 were limited due to the clearing of native vegetation. There were scattered dead trees and an Eagle nest was observed in the corridor. The biodiversity was higher in Acacia regrowth patches. The remnant area within the pipeline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. Page 27

31 3.12 Corridor F235 General Corridor F235 extends south from TP-F029 and ends at intersection with corridor F2 and F213. Proposed corridor F235 is located in both remnant and non-remnant vegetation on the RE mapping. The mapped vegetation includes (see Figure 3-12 below): Not of Concern RE / a (90/10) Not of Concern RE Of Concern Dominant RE a. RE is a semi evergreen vine thicket community which is also listed as a threatened ecological community under the EPBC Act. Endangered RE s are also classified as Category B ESA areas. The corridor occurs across two mapped low order (stream order 1) watercourses Figure 3-12 Aerial image of corridor F235 overlaid with RE mapping and notable species. Floristics The northern section of the corridor does occur in semi evergreen vine thicket (SEVT) RE which has been correctly mapped. This area is comprised of dense rainforest vegetation on steep slopes. Page 28

32 SEVT is endangered under Queensland legislation and listed as a threatened ecological community under the Commonwealth EPBC Act. Three species of conservation significance (total 9 plants) were located within the proposed corridor footprint. Brachychiton populneus (Kurrajong), Brachychiton rupestris and Brachychiton australis were located within the 100m corridor footprint. The details of their locations are in Table 3-8 below. Table 3-8 Species of conservation significance in F235 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton australis Brachychiton rupestris Brachychiton rupestris Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Habitat Values The habitat values on this corridor were significant within remnant vegetation areas. The remnant vegetation had a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with these RE s. The northern area of the corridor in the SEVT vegetation has a very high habitat value due to the presence of an intact regional ecosystem with a complex vegetation structure. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. This includes good biodiversity for foraging and a lot of fallen timber and hollows. The areas of non-remnant vegetation had limited biodiversity and low habitat value. Page 29

33 3.13 Corridor F252 General Corridor F252 extends from TP-F168 north and ends at intersection with corridor F260. Proposed corridor F235 is located in both remnant and non-remnant vegetation on the RE mapping. The remnant vegetation is within land mapped as ESA category C. The mapped vegetation includes (see Figure 3-13 below): Not of Concern RE / a (90/10). Of Concern RE / (70/30). Figure 3-13 Aerial image of corridor F235 overlaid with RE mapping and notable species. Floristics The northern section of the corridor has a large area containing a Gonocarpus urceolatus population. There were several Acacia harpophylla (Brigalow) on the slopes but this is unlikely to constitute the endangered RE (11.9.5). Page 30

34 Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus fibrosa, E. decorticans, Corymbia clarksoniana) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was shrubby/grassy throughout. Therefore the mapped RE is a suitable descriptor for that remnant. The species of are predominantly Eucalyptus melanophloia +/- E. chloroclada and E. populnea for This is similar to the assemblage in that area. The non-remnant vegetation along the corridor is characterised by Chinchilla White Gum eucalyptus plantation on the higher elevation and Buffel Grass dominated paddocks of the lower slopes and valley. Two species of conservation significance were located within the proposed corridor footprint. A single Brachychiton populneus (Kurrajong) and scattered Gonocarpus urceolatus were located adjacent to the 100m corridor. The details of their locations are in Table 3-9 below. The Gonocarpus urceolatus are NCA Vulnerable listed plants. The Brachychiton populneus are Type A restricted plants under the Nature Conservation (Protected Plants) Conservation Plan 2000 which is subordinate legislation to the NC Act. Table 3-9 Species of conservation significance in F235 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton populneus Brachychiton populneus Brachychiton populneus Gonocarpus urceolatus Area around Area around Habitat Values The habitat values on this corridor were significant within remnant vegetation areas. The remnant vegetation had a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with these RE s. The remnant vegetation has a very high habitat value due to the presence of an intact regional ecosystem with a complex vegetation structure. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. This includes good biodiversity for foraging and a lot of fallen timber and hollows. The areas of non-remnant vegetation had limited biodiversity and low habitat value. Page 31

35 3.14 Corridor F258 General Within Lot 6 corridor F258 extends from Lot 20 FTY1805 and ends at Fairview 161. Proposed corridor F238 is located in both remnant vegetation on the RE mapping. The northern portion of the assessed corridor in this report is within land mapped as ESA category B. The mapped vegetation includes (see Figure 3-14): Not of Concern RE Of Concern Dominant RE a The a RE is SEVT and is adjacent to corridor. This will not be directly impacted. Figure 3-14 Aerial image of corridor F258 overlaid with RE mapping and notable species. Page 32

36 Floristics The vegetation description is detailed in the Lot 20 FTY1805 report as this corridor extends from that Lot. Scattered Gonocarpus urceolatus were located adjacent to the Lot boundary and are within corridor 258. No occurrences were detailed on Lot 6. Ten plants having conservation significance (all Brachychiton bidwillii) were located within the proposed corridor footprint. The details of their locations are in Table 3-10 below. Table 3-10 Species of conservation significance in F258 Species Easting Northing (GDA 94, Zone 55J) (GDA 94, Zone 55J) Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Brachychiton bidwillii Habitat Values The habitat values on this corridor were significant within Lot 6. The remnant vegetation had a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with these RE s. The remnant vegetation has a very high habitat value due to the presence of an intact regional ecosystem with a complex vegetation structure. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. This includes good biodiversity for foraging and a lot of fallen timber and hollows. Page 33

37 3.15 Corridor F260 General The majority of the F260 corridor which extends east to west between lots 20FTY1805 to Lot 5 WT217 occurs in non-remnant vegetation with some areas of regrowth acacia woodland. This area is predominantly pasture land with very little woody vegetation. The corridor does intersect one area of remnant vegetation approximately midway across the Lot, at a drainage line. Vegetation surrounding the assessment location is mapped as (see Figure 3-15 below): Not of Concern RE / (90/10). The areas of remnant vegetation mapped as / (90/10) is likely to be partially incorrect and are discussed further below. The corridor crosses three (3) minor mapped drainage depressions within Lot 6CP Figure 3-15 Aerial image of corridor F260 overlaid with RE mapping and notable species. Page 34

38 Floristics The area of disturbance occurs in both remnant and non-remnant vegetation. Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus melanophloia, E. chloroclada, Corymbia hendersonii) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was grassy throughout. The mapped area of RE / is incorrect due the vegetation composition. The species of the area are aligned with RE and this is a suitable descriptor for that remnant. The non-remnant vegetation along the corridor is characterised by sparse regrowth amongst Buffel grass (Pennisetum ciliare) dominated grassland with little woody vegetation. Regrowth includes scattered Eucalypts, Acacia, Wilga and Brachychiton. Shrubs are scattered throughout the grasslands. Two species of conservation significance were located within the proposed corridor footprint. Brachychiton populneus (Kurrajong) and Brachychiton rupestris were located within the 100 m corridor footprint. The details of their locations are in Table 3-11 below. Table 3-11 Species of conservation significance in F28 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton rupestris Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Brachychiton populneus Page 35

39 The above species are Type A restricted plants under the Nature Conservation (Protected Plants) Conservation Plan 2000 which is subordinate legislation to the NC Act. Habitat Values The habitat values on corridor F260 were low except for the drainage lines, and where remnant vegetation was observed. These areas had water, rocky areas, hollow trees and fallen timber and a higher diversity of flora supporting foraging values. The remnant area within the pipeline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. The drainage line had a Quoll, wild dog and wallaby sightings. Raptors were present and the remnant vegetation had significant avifauna biodiversity. The areas of non-remnant regrowth and open pasture land along the southern half of the corridor are very limited in habitat value due to the lack of cover and high prevalence of exotic species. Page 36

40 3.16 Road Corridor General Road corridor is a 100 m wide corridor that commences from TP-F158 in remnant forest at its eastern portion adjacent to the forestry lot (Lot 20 FTY1805) and extends through a eucalypt plantation, then follows an access road west into remnant vegetation, over the escarpment and aligns with corridor F260 on the valley floor. All data for the road on the valley floor is detailed in F260 summary in section 3.15 above. This section discusses the assessment for the Road corridor from F260 in the valley up the slope and to TP-F158 (see Figure 3-16 below) which occurs in remnant and non-remnant vegetation. The northern portion of the corridor is within land mapped as ESA category B. Remnant vegetation includes remnant roadside vegetation and vegetation in the escarpment and slopes. Vegetation surrounding the assessment location is mapped as: Not of Concern RE / a (90/10). Of Concern RE / (70/30). Endangered RE The areas of remnant vegetation mapped as / a (90/10) is likely to be relatively correct. The RE / (70/30) is located at the lower elevation below the escarpment. The is the Brigalow endangered vegetation type, found in a small clump at the base of the slopes. Page 37

41 Figure 3-16 Aerial image of Road corridor described in this section overlaid with RE mapping and notable species. Floristics The area of disturbance occurs in both remnant and non-remnant vegetation. Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus fibrosa, E. decorticans, Corymbia clarksoniana) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was shrubby/grassy throughout. Therefore the mapped RE is a suitable descriptor for that remnant. The species of are predominantly Eucalyptus melanophloia +/- E. chloroclada and E. populnea for This is similar to the assemblage in that area. The small patch of Brigalow (11.9.5) located at the base of the slopes is adjacent to and west of the existing track and can be avoided. Page 38

42 The non-remnant vegetation along the corridor is characterised by Chinchilla White Gum eucalyptus plantation on the higher elevation and Buffel Grass dominated paddocks of the lower slopes and valley. Two species of conservation significance were located within the proposed corridor footprint. A single Brachychiton populneus (Kurrajong) and scattered Gonocarpus urceolatus were located adjacent to the 100 m corridor and at the base of the steep slope. The details of their locations are in Table 3-12 below. The Gonocarpus urceolatus are NCA Vulnerable listed plants. The Brachychiton populneus are Type A restricted plants under the Nature Conservation (Protected Plants) Conservation Plan 2000 which is subordinate legislation to the NC Act. Table 3-12 Species of conservation significance in Road Corridor Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Gonocarpus urceolatus From boundary to TP-60 From boundary to TP-60 Brachychiton populneus Brachychiton populneus Brachychiton populneus Habitat Values The habitat values on this corridor were significant. The remnant vegetation had good biodiversity for foraging and a lot of fallen timber and hollows. The low escarpment would provide habitat diversity. The remnant area within the pipeline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. The areas of non-remnant vegetation had limited biodiversity and low habitat value. Page 39

43 Ecological Assessment Report 3.17 Corridor Powerline 1 General Powerline 1 is a 20 m wide corridor that occurs in non-remnant vegetation between F260 and F26 in the north of Lot 6CP The majority of the corridor is within the existing road corridor (Figure 3-17 below). Figure 3-17 Aerial image of Powerline 1 corridor described in this section overlaid with RE mapping and notable species. Floristics The area of disturbance occurs in non-remnant vegetation. Buffel is the dominant vegetation throughout, with scattered Acacia shrubs and False Sandalwood. No species of conservation significance were located within the proposed corridor footprint. Project File _Santos_Fairview_Ecological Assessment_LOT_6 CP908635_ doc 10 June 2011 Revision 0Aurecon Page 40

44 Habitat Values The habitat values on this corridor were not significant. The areas of non-remnant vegetation had limited biodiversity and low habitat value. Page 41

45 3.18 Corridor Powerline 2 General Powerline 2 surveyed a 20m wide corridor that commences at 6399-TP-60 in remnant vegetation and extends west and intersects with F41 (Figure 3-18 below). Land use is typically roadside remnant vegetation on the east portion and eucalypt plantation on the western portion. The corridor within the remnant vegetation is located at the edge of a steep escarpment (northerly aspect). If the powerline easement is moved 20m to the south and adjacent the access road, it would avoid traverse steep slopes and The majority of the corridor is within land mapped as ESA category B. Vegetation surrounding the assessment location is mapped as: Not of Concern RE / a (90/10). Of Concern - Sub-dominant / (70/30) The areas of remnant vegetation mapped as RE / a (90/10) is likely to be largely correct. The RE / (70/30) is located at the lower elevation below the escarpment. Page 42

46 Ecological Assessment Report Figure 3-18 Aerial image of Powerline 2 corridor described in this section overlaid with RE mapping and notable species. Floristics The area of disturbance occurs in both remnant and non-remnant vegetation. Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus fibrosa, E. decorticans, Corymbia clarksoniana) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was shrubby/grassy throughout. Therefore the mapped RE is a suitable descriptor for that remnant. The non-remnant vegetation along the corridor is characterised by Chinchilla White Gum eucalyptus plantation. Two species of conservation significance were located within or adjacent to the proposed corridor footprint. A single Brachychiton populneus (Kurrajong) and scattered Gonocarpus urceolatus were Project File _Santos_Fairview_Ecological Assessment_LOT_6 CP908635_ doc 10 June 2011 Revision 0Aurecon Page 43

47 located at the 6399-TP-96 site and extended within the roadside corridor, east to the plantation area. The details of their locations are in Table 3-13 below. The Gonocarpus urceolatus are NCA Vulnerable listed plants. The Brachychiton populneus are Type A restricted plants under the Nature Conservation (Protected Plants) Conservation Plan 2000 which is subordinate legislation to the NC Act. Table 3-13 Species of conservation significance in Powerline 2 Species Easting (GDA 94, Zone 55J) Northing (GDA 94, Zone 55J) Gonocarpus urceolatus TP-96 TP-96 Brachychiton populneus Brachychiton populneus Habitat Values The habitat values on this corridor were significant. The remnant vegetation had good biodiversity for foraging and a lot of fallen timber and hollows. To the north of the corridor there was a steep escarpment which would provide variable habitat types. Many small birds were observed in this area. The remnant vegetation area within the powerline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. The areas of non-remnant vegetation (plantation) had limited biodiversity and low habitat value. Page 44

48 3.19 Corridor FV 93 Access Road General The majority of the FV 93 Access Road corridor occurs in non-remnant vegetation with some areas of regrowth acacia woodland. This area is predominantly pasture land with very little woody vegetation. The corridor does intersect remnant vegetation at the northern portion. Vegetation surrounding the assessment location is mapped as (see Figure 3-19 below): Not of Concern RE / (90/10). The areas of remnant vegetation mapped as / (90/10) is likely to be partially incorrect and are discussed further below. The majority of this corridor lays within the ESA Category A buffer. Figure 3-19 Aerial image of Fairview 93 Access Road corridor described in this section overlaid with RE mapping and notable species. Page 45

49 Floristics The area of disturbance occurs in both remnant and non-remnant vegetation. Within the remnant vegetation at the mid of the corridor, the predominant vegetation is Eucalyptus species (Eucalyptus melanophloia, E. chloroclada, Corymbia hendersonii) and Cypress Pine woodland, over a shrubby mid stratum dominated by Acacia species. The ground cover was grassy throughout. The mapped area of RE / is incorrect due the vegetation composition. The species of the area are aligned with RE and this is a suitable descriptor for that remnant. The non-remnant vegetation along the corridor is characterised by sparse regrowth amongst Buffel grass (Pennisetum ciliare) dominated grassland with little woody vegetation. Regrowth includes scattered Eucalypts, Acacia, Wilga and Brachychiton. Shrubs are scattered throughout the grasslands. Habitat Values The habitat values on this corridor were low except where remnant vegetation was observed. These areas hollow trees and fallen timber and a higher diversity of flora supporting foraging values. The remnant area within the pipeline footprint offers a relatively undisturbed environment and therefore retains the intrinsic habitat values associated with that RE. Mature trees and shrubby understorey provides a high level of cover and possible nesting hollows. The areas of non-remnant regrowth and open pasture land along the southern half of the corridor are very limited in habitat value due to the lack of cover and high prevalence of exotic species. Page 46

50 4. Other Survey Area Summary The following table lists all other areas within lot 6 that have been assessed. These areas have been surveyed within other corridors and consist of Test Pits, Access Roads and any other proposed development requirements. Table 4-14: Other Survey Areas and Associated Corridors on Lot 6 Corridor or Area Name Associated Corridor Note FV548 in F233 1 Brachychiton rupestris FV800 in F213 Remnant vegetation FV 92 Access Road Not in overview 2 Brachychiton populneus TP-F010 Not in overview Remnant vegetation TP-F134 In F213 1 Brachychiton rupestris TP-F140 in F233 Remnant vegetation TP-F141 in F233 - TP-F142 in F233 - TP-F156 in F258 1 Brachychiton plant TP-F178 in F260 4 Brachychiton plants TP-F179 Not in overview Remnant vegetation TP-F180 Not in overview RM-05 in F260 Gonocarpus lanceolatus 6399-RM-06 in F RM-11, 6399-TP-60 In Corridor Road 3.16 Remnant vegetation and Gonocarpus lanceolatus 6399-RM-19, TP-F160 in F258 Remnant vegetation and Gonocarpus lanceolatus 6399-RM-24, TP-F141 in F233 Remnant vegetation 6399-RM-25, 6399-TP-84 Powerline between F233 and F163 (in Lot 8 report) 6399-RM-27 in F TP-52 in F TP-53 in F260 Remnant vegetation 6399-TP-54 in F260 Gonocarpus lanceolatus 6399-TP-56 in F TP-96 in Powerline 2 Gonocarpus lanceolatus - Page 47

51 5. Conclusion The pipeline corridors occur across a variety of landscape and vegetation types. While most the corridors occur in previously disturbed areas, species of conservation significance occur in multiple corridors, including endangered communities and vulnerable species. Some of the proposed corridors also occur adjacent or in close proximity to Semi Evergreen Vine Thicket which is a Category B ESA and a small stand of Brigalow which is a Category B ESA. Remnant vegetation occurs within multiple proposed corridors. Multiple watercourses occur within or in close proximity to development areas. Areas of high ecological value occur in or near numerous corridors. Page 48

52 6. References Eddie, C. (2007). Field Guide to Trees and Shrubs of Eastern Queensland Oil and Gas Fields, Santos House, Adelaide. Regional Ecosystem Mapping, Version 6, Department of Environment and Resource Management Species Profile and Threats Database, Page 49

53 Appendix A Botanical Species List