Figure 1 a Generalised Map of Regional Geology of Blueskin Bay and Surrounding Hinterland (Source: Nicholson, 1979)

Figure 1 A generalised map of regional geology of Blueskin Bay and surrounding hinterland (Source: Nicholson, 1979).

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Figure 2 Spatial distribution of five main sediment facets deposited on the South Otago shelf (Source: Andrews 1973).

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20 25 30

25 15 20

A 1

30 PeninsulaSpit 25

Figure 3 POL seabed sounding lines (2 km spacing offshore) and contours at 1 m increments and annotated every 5 m increments (m; Chart Datum), illustrating the bathymetry coverage within Blueskin Bay and the inner shelf. The hatched squares (A1, A2) indicate initial site options considered for placement of dredged sediment (Source: Figure 3.1 Bell et al. 2009).

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Figure 4 New Zealand Hydrographic Chart NZ661 Approaches to Otago Harbour (Thumbnail download www.LINZ.co.nz)

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Figure 5 Distribution of fine sand (grain size 125-250 m) content (%) in the sediments of Blueskin Bay. Note that Box A and Box B in this diagram are referred to as Site A1 and A2 respectively in this and the biological resources report (Source: Willis et al. 2008).

Figure 6 Distribution of silt (grain size < 63 m) content (%) in the sediments of Blueskin Bay. Depth contours are at 5 m intervals from 10 m to 30m. Note that Box A and Box B in this diagram are referred to as Site A1 and A2 respectively in this and the biological resources report (Source: Willis et al. 2008).

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KARITANE PEN

Key 10 5 Coastline Shipping Channel 15 Relative Rollability Contour 5 Zero Relative Rollability Contour 5 10

N Scale 10 0 2km BRINNS PT 5

5 10 5 10 5 15 10 10 5 Casseys Cr 5 10 15 15

WARRINGTON SP 15 25 10 5 10 20 15 10 -5 20 10 5 15 10 10 BLUESKIN BAY 5 ESTUARY Heyward Pt Dump -5

20 15 5 -5 Alexander Cr 10 -10 -15 -5 -20 LONG BEACH -5 -10 Purakanui Inlet -10 -15 -10 -5 -5 -15 HEYWARD -5 -25 POINT -10 -20 -5 Drivers Cr -15 -5 -10 Aramoana Dump -5 10 5

Shelly Beach Dump -5 -10 5 10 TAIAROA HEAD

-5

Figure 7 Average relative rollability (%) distribution for sediment samples collected 2002. Negative values indicate a ‘sink’ or depositional area, while positive values indicate a ‘source’ area for sediment transport.

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Figure 8 Sediment transport paths inferred from rollability analysis of samples (red crosses) collected by NIWA for Willis et al. (2008).

JES-453609-372-338-V2 generally soft to very soft and non-plastic. Water content was between ~ 30 – 40% and had a measured shear strength between 14 – 24kPa. generally soft to very soft and non-plastic. Water content was between ~ 30 – 40% and had a measured shear strength between 14 – 24kPa.

FigureFigure 9 2 Location.17 Locat iofon sediment of sedim esamplingnt sampli nsitesg sit e(Ports (Po Otagort Otago Drawing Drawin g11011). 11011) . Figure 2.17 Location of sediment sampling sites (Port Otago Drawing 11011).

Figure 2.18 Description of sediments taken from bores relative to channel position (Po rt Otago Drawing 11024). FigureFigur e10 2 Description.18 Descripti ofon sediments of sedim etakennts ta fromken f rboresom b orelativeres rel atotiv channele to cha positionnnel pos (Portition (OtagoPort DrawingOtago D 11024).rawing 11024).

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