Approved Plans for Change to Existing Approval OPW11/0116.01

 

 

 

 

 

 

 

NOTES

1. Design conditions
1A. Tides [QT tide tables, Noosa Head]

AHD LAT
HAT +1.06m +2.18m
MHWS +0.62m +1.74m
AHD +0.00m +1.12m
MLWS -0.80m +0.32m
LAT -1.12m +0.00m
1.2. Flood [Noosa River Flood Study, John Wilson & Partners, 1995]

50yr ARI 1.44mAHD

entrance scour 0.5m
1.3. Currents [6CCM numerical model]
Max spring tide 1 -1.5m/s.
Velocities expected to vary in response to prevailing channel configurations and location within
the estuary.
1.4. Waves
Hs 1m [nominal]
Potential wave conditions at the foreshore are expected to vary in
response to prevailing channel configurations.

2. Materials - Geotextile and Sand-filled Geotextile Mega-Containers

24; Containers to be fabricated using ELCOMax 1209RP geotextile (or equivalent). Expected lifetime
25 years.

2:2: Container length to be 20m [may be altered if necessary or preferred by contractor].

2.3: Containers to have suitably spaced filling ports [MIN 3 preferred] with "screw & glue" closure types.

2.4. Geotextile underlay to be ELCOMax 600R (or equivalent)

25s Geotextile flaps, where required, are to be of sufficient size to provide a 30m x 6m flap. Flaps are to
be fabricated using ELCOMax 600R (or equivalent). Flaps are to be adequately secured (e.g.
stiched) to the bottom of the container.

26; If flaps cannot be fabricated, may be replaced with separate geotextile fabric with 1m laps.

3. Filling of Containers
3.1. Excavation tolerances
Vertical +/- 0.2m
B12. Containers to be filled in accordance with manufacturer's specifications using either jetpump, dredge
or suitable alternative.
3:3. Design filled container dimensions as shown.
3.4. Finished container tolerances
Horizontal +/- 1.0m from design alignment [containers to be well butted together]
Vertical +/- 0.5m at any single point
+/- 0.3m averaged over 10m

4. Maintenance

4.1. Nominated geotextile is more robust than the standard geotextile, however may be subject to
damage from vandalism, vessel impact, anchors etc.

4.2. Structures to be inspected periodically and after all major events.

4.3. Any minor damage is to be repaired as soon as practicable.

4.4. Any major damage or deflation and the container is to be replaced.

4.5. If damage is an ongoing concern, consideration may need to be given to armouring the structures
[e.g. with rock].

46. Scour may require topping up with additional containers or placing of rock in scour holes

5. Monitoring
5.1. The natural system is highly variable. Monitoring is to be undertaken in accordance with ICM Report
"Option Review - Noosa River Spit" to determine the performance and impacts of the works.
5.2. Works may be modified or removed if monitoring indicates that this is necessary.
5.3. Implementation of later stages of the works to be undertaken as required.

 

 

Sand-filled Geotextile Containers
Finished dimensions
[Filled above water level]

Nominal Diameter = 3.0m
Volume = 81m?

Nominal Diameter = 3.4m
Volume = 103m°

Nominal Diameter = 4.2m
Volume = 183m?

Nominal Diameter = 4.6m
Volume = 224m?

ys os

/ T3 \ | 20m
—— _ 6m

|

 

 

 

Sand-filled Geotextile Containers
Finished dimensions
[Filled below water level]

Nominal Diameter = 4.6m

6
Flap peta ON

 

 

 

|] LOCALITY PLAN

 

NOOSA SPIT

7 Tere)

 

LEGEND

 

ERTICAL DATUM AKO

Fonzoraomton wea

 

REVISION REGISTER

 

 

 

 

 

8 |t61103

Amended te lec | A

 

A loson.11

For IDAS approval rol ec | A

 

fhevne | DATE

CESCRIPTION BY ENG | APP

 

 

 
 
   

POST PO Bax ‘HE, Main Beach LPO, Man Beach QLD, 4
TELEPHONE 61 /SHbHREL FAK Bt 40
WeBSTE

) International
Coastal
= Management

‘eww coastalmanagement Com au

 

PROJECT NAME

NOOSA RIVER SPIT

 

DRAWING TLE

NOTES

 

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NRS-011

 

 

RAVAN RO

 

 

 

 

 

 

 

 

[CHECKED SS APPROVED AI

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