/q7S//79

DEPARTMENT OFMINERALS AND ENERGY

BUREAU OF MONERAL RESOURCES,GEO_OGY AND GEOPHYSEICS

Record 1973/179

SEARCH FOR GRAVEL DEPOSITS FOR PADDYS RIVER ROAD,A.C.T., 1972

by

R.J. Hansen

Pie information contained in this report has been obtained by the Department of Minerals and Energyas part of the policy of the Australian Government to assist in the exploration and development ofmineral resources. It may not be published in any form or used in a company prospectus or statementwithout the permission in writing of the Director, Bureau of Mineral Resources, Geology and Geophysics.BMR

Record1973/179

c.3

r

Record 1973/179

SEARCH FOR GRAVEL DEPOSITS FOR PADDYS RIVER ROAD,A.C.T., 1972

by

R.J. Hansen

I I I I I I I I I I I I I I I I I I I I

-----------

COlltEl'fS

SUHMARY

INTRODUCTIOB

GEOLOGY GEBERAL WEA~BERDfG .ABD GRAVEL

FIELD INVESTIGATIONS GRAXODIORI'fE AID ADAMELLITE SEDDIENTARY ROCKS AID VOLCABICS CBEEK DEPOSITS

RESULTS AID COICLUSIOIS

RECOMHEllDATIOIlB

REPEREllCES

APPEllDIX 1. DefiDitions of Gravel, PlastiC. and ROD-Plastic

FIGURE • •

2. Particle Bize Di.strtbutioD of Pierces Creek Gravel . Deposit Samples

1 • LOCALITY MAP 2. AREA OF IlVESTIGA!IOB ,. LOCATIOI OF AUGER HOL&S, PIERCES CREEK DEPOSIT

Page

. ·1

1 1 ·1

1 1 2 2

2

2

2

2

3

I I I I I I I I I I I I I I I I I I I I

Plastio and DOn-plast1c gravel is requ1rec1. for use as baae oourse material and for the shoulders ot the Paddy's River Road, and a search of the surrom:adiDg area was undertaken to tind su1 table material. Weathe:red material hom the Sbalmons Flat GranocUor1te vas tound to 'be unsui table in most areas owiJIg to the abUDdance of blotl te and the high plasticlty indices, however, a prom1s1Dg area was found on IRiverlea l where a deposlt of at least 10 metres thick would probably be suitable tor use &8

plastio gravel. Material direotly usable as non-plastl0 gravel could not be located. However, 80me creek bed sec1.1.Jnent8 in Pieroes Creek have a ve'r3 low 8i1 t oontent whIch Is too low tor non-plaatlc gravel, but 1 t 18 oon81de:re4 that a sui table materlal oould be t01'med by mixing the Ple%'088 Creek gravel wlth p1astio gravel derived troJa the granocUarlte. .

FIGURE 1SEARCH FOR GRAVEL DEPOSITS FOR PADDYS RIVER ROAD,A.CT, 1972

1480 50^ 149°10'

'HAL L^

..._. ,

^

S^co, 7^ 1,4tIVO^,la• 4:1^.1-^2

,911..‘ glis

0".

—35°20 e .

_

01

"Zr ; Area Investigated

11110 Built up Area

Railway

Highway

Principal Road

^ Secondary Road

Vehicle Track

Territorial Boundary

•14/ 1;.#

../SA 'DRIARRA •/

,

/,'"=.'/COTTER

DA• =^M

142741/7

,111

Q14/7BENDORA DAM

/

CORI4 DAM(1,

■' o

--o^NAAS•cr.-4^....'

^

0— '^•

4.1^\ t .-.,^...,....../.."^N (N^,

0^),^.....'^I

^

'C' ^\ -,1:6

.:(^)^'i C 1,^\ \

0^(^(..-:.-^‘N\

2 '^ • , '— L.^l^

‘■^1

-i5°40.1^)

INtRODUCTION

In June 1970, the Bureau of Mineral. Resource8 (BMR) waa requested by the Department of the Interior (D.I.) to locate deposita ot plastic ad. non-plastic gravel* within a 4 km :rad1u8 of 'RiTerlea t homestead on Padd7s River Road. The area of 1Dvestigation was later extended to a. radius ot about 8 laB £:Nm 'Riverlea' homestead (Fig. 2), and. acoe8s was gained to Pierces Creek Forest and to Blocks 1, 10, 16, 24. 29, 33, 34, 35, 41, 47 and. 76, Paddya River Distriot.

Constraints imposed bi the Department of the Interior on the location of gravel pits were as tollovs:

pits should be less than 8 km from the roadwGrks th~should be accessible from existing roads they should not be located on freehold or resumed freehold land they should not be readily visible from eJ:i8ting roads

cp;0LOGY

General . The area was mapped by Snelling (1960), and is covered by the

Canberra 1:250,000 Geological Sheet, sm/55-16 (StruB8, 1971). The rocks are, in decreasing order of abundance, the Shannona Flat Granodiorite, sedimental7 rooks of prob~ble Ordovician age, Silurian Volcanics, !barva Adamellite and m1nor amounts of aplite, microg,t'anite, and propbyrlt1c leucog.ran1te.

hat"riA. ADd G'ay'~ The suitability of material tor u.e as plastiC gravel depends on

the chemistry of the parent rock, the development ot co.pletel1 weathered roCk, and the extent to which the weathered profile bas survived the present cycle of erosion. Completely weathered material derived trom a biotite-rich parent rock, such as the ShaDAons Flat Granodiorite or some of the volcanic rocks, invariably oontains a red.plastic clay. which renders it unsuitable for use as non-plastic gravel; however, areas of slopewash derived trom completely weathered volcanic or granitio rocks may provide suitable material because muoh of the olay would have been washed troll the material during transport. The weathered argillaceous sedtaentary rooks are ,aD.rally too claJey tor use as gravel.

9fIDQd~Qrite gnd td,,811it. The aoid igneous rocks of the A.C.!. provide both plastic and

non-plastic gravel and many thousands of cubic metres have been won in the past. Commonly ocourring:'ID1de8irab1e materials 1n such gravels are organic matter and f'lakey or platy minerals such as biotite. and to a lesser utent muscovite andchlor1te. Unfortunately, biotite.is present to varying amounts in lIlost parts of' the batholith and this generally readers in situ weathered material unsuitable as a souroe for gravel.

More than 150 hand auger holes (logs of'these are available at BMR) were drilled to check depth of' weathering, degrees of leaChing, and development of red clay. Favourable sites were chosen for ezamination with a power auger.

*

The most suite-ble ~terial for use as plastic gravel was found on

Minimum reserves of about 7000 au II are generally OODsidered to constitute a viable deposit. See Appendix 1 for def'initions of' terms 'Plastic' aDd '.on-Plastic Gravel'.

I I I I I I I I I I I I I I I I I I I I

PIERCES

--- --- --- -- --

( I

\ 10

\ I

FIGURE 2

AREA OF INVESTIGATION

Area investigated

Unsealed rood

Sealed Rood·

47 Freehold block

,~

\~ 'c:.

47 \ ~ '0

\~ \

TN MIV

'( \ -;/' \,-- ! I

\1----

29

36

" .. ---.---.---.......

\

I I

\

~,-____ ~~A~M~£~N~OM~£~N~T~Sro~-r.~~O SCAL£Z 3km ~No~.~ __ ~O~e~.C~"~Pf~lo~n ____ -+A~u~fh~o~r~C~h~ec~.~ed~~1 ______ ~L-______ ~ ____ ~I

COMMONWEALTH OF AUSTRALIA

BUREAU OF MINERAL RESOURCES CANBERRA, A CT

AI

I

I I I I

I-+--------------+--+----~ Bose mop/survey AC T LAND TENURE A2 ~------~~~~~~::--~~~~~::~~~~~~~

TITLE AREA OF INVESTIGATION A3

GeolOQy by R.J. HANSEN

CompIled and checked hacked ond approv A4 A.T.LAWS

A5 PrOjecf geologISt SenIor geoloQlst

E.G. WILSON

PROJECT Search for gravel deposits Paddys River Road,A.C.T, 1972

fO accompany Record

1973/179

Drown b)' OrOWlng No

P.BLYTHE I55/AI6/I073

HOLES FIGURE 3IN PIERCES CREEK DEPOSITOF AUGERLOCATION

p .C4 C (I,L'2)

•PC 4 D(2 1/2

TITLE LOCATION OF AUGER HOLES

IN PIERCES CREEK DEPOSIT

PROJECT Search for gravel depositsPaddys River Road,A.C.T, 1972

Supervising geologist

TNMN

o^10^20^30m^1

Auger hole location with

depth in metres to cloy

Stream bank

• PC4N(l)

• PC40( 1 1/2)

•PC4M( 3/4)

• PC4L(I //2)

• PC4P(I)•PC4K(I I/2)

• PC4J(I)

.PC41-1(2

• PC4I(1)• PC4G(I1/2)

• PC4B(I/1 2)

PC4F(0) •

• PC4E(2)

• PC4E(2 )

-2-

Block 41, 'Riverlea' station (Hole Bo. P.R. PRo,), where seismic investigations indioated that granite at this looality was highly weathered to a depth of at least 10 m. loather potential deposits of plastic or non-plastic gravel were found on granite.

S,d1mentary fpot, and yplp8Di gB -The sedimentary roob oonsist mostly of shale and impure quartzite.

Although a suitable gravel deposit could possibly form in reworked slopewash from tbese parent materials, DO suitable material vas found in the Paddys River area. The Paddys River Volcanics are of intermediate composition, giving rise to·olayey weathered profiles of shallow depths, generally about 0.5 to 1.5 m.

Cleek depositA Creek sections were examined to determine suitability of the

creek-bed sediments. The only occurrence which did Dot show an excess of organic matter or clay was at Pieroes Creek (Fig. 2). Sixteen power auger holes were d~lled (rig. ,), but the material is poorly graded: it has a low silt and olay oontent (Appendix 2). The deposit is unsuitable for plastiC or non-plastic gravel, but could probably be mixed with a more plastic material to obtain a gravel with a satisfactory range of Plasticity Indu. Reserves of about 5000 cu m were proved.

RESULTS AND CONCLUSIOBS

With the exceptions of the plastic gravel deposit found on Block 41, and the small reserves of material with poor grading characteristics at Pierces Creek, no other suitable plastiC or non-plastic gravel deposits were found.

RECOMllENPATIO,S

The area south of 'Riverlea' may be served by the Gibraltar Creek gravel pit (Vandenbroek & Hansen, 1m), and the search for Suitable material should be extended to the Uriarra area, which couldserv. the Paddys River Road north of 'Riverlea'. -

REFERENCES

SNELLING, N.J., 1960 - The geology and petrology of the Mur.rumbidgee Batholith, oum, J. Gaol. SP9. LODd., (CXVI), Pt. 2, 110. 462, pp. 187-217.

STRUSZ, D.L., 1971 - Canberra, Australian Capital Territory and Bew South Wales 1 :50 000 geological series. Btn:, Min';' IeBQUE. Get. uplau. Notes SI/55-16.

VANDENBROEK, P.R. & HANSEN, R.J., 1973 - Gibraltar Creek Gravel Investigation, A.C.T., 1972. Bur. Min@l. Resgur.- Aust, leP. 1973/146-(ttnpubl.).

APP!liDIX 1

DEFINITI9NS OF GRAVEL. PLASTIC AND NOI-PLASTIC

'Gravel' is used in this report in an engineering rather than geological s~nse. It is defined as an unconsolidated, well-graded mixture of gravel-sized rock fragments and/or mineral graiDs 8~ch as quartz and feldspars,

together with sand and silt, in a feebly plastic soil binder. It should be stressed that the terms gravel, sand, and silt refer only to particle size according to the Unified Soil Classification System, and not to their mode or origin. .

'Gravel' derives its strength from meohanical interlock owing to high internal friotion of its sub-angular components and s,ec1fioations have been designed bf the Commonwealth Department or Works (CDr) for quality control (see Appendix 2). These specifications are based on the assumption that the performance of 'gravel' is influenced by two characteristics, partiole size distribution and plasticity. !he latter is determined by an empirical test which indicates the affinity or the material tor water and thereby the potential volume change of the clay binder. Particle eiBe l1Dd.ts are flexible, but the. grading curve should be smooth.and parabolic.

'Plaatig' and 'ngn-plattig Ilayel' There are two types' or gravel required for rural roads. In anB1r&eeriDg

terminology they are known as 'plastic gravel' an4 'non-plaatic gravel'. '!he former is used for surfaoing unsealed roads and for· shouldera on sealed roads. It. plasticity iDdex (PI) should Dot exceed 8 and its m.axilnDa partiole si._ should not exceed ,.8 om in diueter. '.on-plastic gra"el' i8 uae4 aa a surface course underneath a aeal and its PI moat DOt exceed 6 and ite maxt.aa particle ei.e should not exceed ,.8 ca.' .

In general, the 'plastiC' variety should have a higher percen'tap of fine-grained material than the 'Don-plutic' type because vehicle traffic tenda to remove a considerable portion of the riner pained .. terial.

mgDIX 2

PARTICLE SIZE DISTRIBUTION OF PIERCES CREEK: GUm .1IP9SIT SMPLES

The following· oharta show the relatioDsh1~ betwe,n the sample particle size, the Commonwealth Department or Worke (en) Bl"&d1Ilg apeoifications and-the theoretical ideal grading derived from talbot's formula. !albot's formula gives the range of particle sizea, from the smallest to the largeat, which will reaul t in minimull pore space atter ccapaction •

. The formula ia p = (i). x 100,· . where p. perceDtage b,y weisbt smaller thaD &D7 partiole

aize d. d = particle aiBe D = maximum particle sise % ia a tuDction ot the particleahapeJ it is

usually taken betweeD 0.25 and 0.40. In this case the exponent was taken to be 0.". NOTE:· THE PARTICLE SIZE DISTRIBU!ION CURVES SHOULD BE 'l'REATED WI'rH CAUTIO., AS THEY BEPRE~ SAMPLES OBTAIIED BY CONTIlUOUS l>ISTtJRDD AUGERDlG.

The particle size distribution charts indicate tho ltmits of the CDV grac1ing specifications as daabed lines, the Talbot eurve aa·~ a dotted line, and the sample curve as & solid line.

--------------------PARTICLE SIZE DISTRIBUTION CHART

8.S.STEVE 3" 1" 3" 1" ;#7

16 4 & 2 " 1 " 2... 1" 1-

4 2 3" 4!.." 6"

2 9" 12" 1S"24" 36"

f-.- - ----1------. f--. - -- . 100r---~----~-.--,---~----~~-r----.----.~--._--_.--_.._--,_--_,r_~~----r_--·7r----.__r_r_,r_._,~

- -. -- . ~---~~ -~.~---- Ii -... -- ~-- Vl' . - /// 90 1-.------~---.-----_+_. _.-_-I-f----.--4---.--.---+-----..:.:..-.---4------.-+f--+.--+---+---+--I----+--t-t-~+_---tJ'-t-~'-,'__t_. ------¥;~-.-j--"""1---r-1---t-.. 1---1O

~--- .-.- -::. r:-:-=.~---r-~ - f--~ . .+---jh-= ,--+ ..• . / /- //

::~~-·~-·-_+.:I=-=·=~·=-·!::-·:=~~-=·-·· !::==-=-.. -::::!. ~-=---=-=-~-===-:::!:-=. ·-=--;tl--+--·-·-----t·----t-+-+---jt/-'---:-:t---:t, Jvrt·~/-/r_--__rt/-/--t---_t--II-,--t-J:: : ; ~ =~- i REFERENCE I~-~·~_·--·---~-~~··-·----~~~~·t-t~.-------.~.~ ~·~,·_!_/~~~~/~~~~~~·~-~----~·4_~--l.-1. ~ : ~._·--_.-_· .. -._Ii ---- CDWlimils ..... ----- --.----.- _1-/ 1(,./' /·i 1 ; 0. •••••••••••• Talbots ideal curve 11---·-~I--·----.... I--·----·-_1· ~f-_--.--+--~. p---.. --_1-I----I-IJ....-/~~-_+_-I----1~-_+---t---t--t-1-_t__j-.J'i~

. ill 50 1-1--_-._-._.-1 Particle size of sampie ~_ --.:... -- -- -- f-j' - --:~1:'/ ~/ ·1 ~ .Ut ~-:-:'_I-- .-- -. . V..... I . .j ; 4 •• J 6t)

.; AO. ~ - .---- ... - -- .~_~ _. __ . - ... -.-_ ... ... - k(_ .•• ,.,. / // )1 ~ &.II .•.. ~ ._. ___ .• ~'-.::._: ~_ _ ~:___ .../.' . / p

u .. : f---. --I-:-.-r ... ~- '.- - . - -----... ./L_ - ··-~Io··' ~. . 1'~

: 30 ___ r=_---t--- .---- -:.:. ... - -~.--~- :-..~.= l~_--------_~·./ -_ -.~ •• ' ..... ~. -;,.,' L L -,,// '-1" 0. f-- --... - -- ~-- ~-- V ... ,-_" ~

20 ~--.------I----------_+_~---.. ..;..-~' -4------+---+--4-+-----::~=---+-4-~+--+_7~~-+--I---_+--+---+--t__t_--t--t-.. . s·o -- .. --.--~~ .. --~~.:.= ~-.~- _.~:~r:- -~~ :; ... :.:~< - V /'~/ 10 1---1--' =:::~-~ .. -+-' --'--.-1-..... --_-_·-4f-_·_--·_---..... --,-.. -+--+-1--.--.---.--+---. ---1--b.~L.V~-I---·-+--I--+--+----+--t---+-t-+--+-t--l %

1-.. -.- - .•.. - ----.- ,- - .~.........-:~ .,

o I •• I I I I ---:;~~~:.'-::.: .. -, .. -,.~~,-~ -, - , -~-~.-~~ I 'J , " I ", II .. .L _I.- .L....--u,J,oo 1 2 4.6 10 20 40 60 0-1 0-2 0-4 0'6 2 4 6 10 20 40 60 100 200 400 60(1

. PARTICLE SIZE -MICRON I PARTICLE SIZE -M ILL IMETRE M (G )368 (Iof ~

ClAY SILT SAND I G R AV E L COBBLES I BOULDER'" FINE I MEDIUM 1 COARSE FI NE IMEDIUM I COARSE I FINE TMEDIUM iCOARSE

u z -III III

~ 0..

11.1 UI

~ ~

z 11.1 u a: 11.1

0..

--------------------PARTICLE SIZE DISTRIBUTION CHART

8.S.S1EVE 16 4 , 2 3" 1" 3" 1" 2."1" ~"

4 2 3" 4~"6"

2

100r---~--~--~-,----~--~~~----~--~~~----~--,_--_r----r_--,_--_,--~r_~!I_._.--._._~A

:.--1----- 1---. -- .-- .. f---·-:~-l-- _~- o--:'j---- -/":. - _ 90~--~-------~----_+--~-~-·-~-------+----------··~·---~----+------~---+--~+_--~----r4.--.~.--~--------~ . .h . . ~'--~rr_------~-r~/-----~~-·------_r-~-~-·_t_t_1'0

: /1__ ----1---- J -(,/-~~ ;.-:._=~/ . t- _.

-.-.- - . - - --- -. ---- r----- --.-.- '~---t-----' "'--- c~ r ---- -+---+--+--- .~. 7 --. __ --- .1,',:/ _ j .. -. - . -. -- --80~--~--~~~-4----+---~-4-+----~--+_~_+--~~--~--_f~~~~1_~~----t_--_r~~~+_i__1~

~------+-----._4t--... ~-.~~~-----+.--_4--~~-_+-~~~~--+_--+_4_4_~--~.~vL----~~-+_~+_~-;lL'~:~·-~---~-·+;--'-:1· --~r_------r---~-~--r_~30; 70

60

50

40

30

20

- ----- . -.- --'-I- --.--. '--~- '- /, •• -- -- .-'-" - - ., n --~--- ... ---.- .-.- :I . - - I ""

~--~--.--+~-.--~_4-------.-+----.. --~~+_.-----.. ---~.--_+--~+_. ~fL--~~·--:------·-~~------~-L/~·~·-·---~----·---AJ-··---1----t_~_r-----~--~·~----+_i__140 ~ .-- / -/.1/ - l . G'I '-:,.-:::---: . ---- .---- ..... -J' . / ""

- r-- - .. - --- ,... f------ - --- -...----/--. --- .. ,. - J ~--4----+--~-4----+---~~_+----~~+_~~--~~~~~~----~~4_--_4----+_--~~~~+_~_150 ~

-.-- -- - -.- -/ -.. . -~7'" / j' ~

~--4_--_+--~~-----+--~--.---~-_4---+_--~--_+.~~~~-_+--~~,'-.-~. ~~--+_~~j--~~--4---_+----~~~_+_+__;~ ~ ... _ ... _ __ . -v~",/ -'. V ,t.--- ~

~--~---+-·~---·~~~----~~··----+_----·~-~----4-_+----~/~~--~---_b~#+#-·/~~--~~L·4_·--~~/----~--~~~--~~--_r~r4--~~~70 0

-: 1- //- ----.-, ,/' . v· // V.' / ..

~--~--~~~-+--~----+-~4--.~.~.~.<~~---~~~~~/~~/~-.~4_--_+----~--1_--~--_1--+-T-~~-180 ......... V, ~/

.. --- -t- .. -

. -- ~--- ._-_ .. - - -

-+ --.. - - l/:~/ - . 10~--~--~--~~----+_--~~_+----~--4_~~~--~~~--_+----~--~--~----+_~~~~~;_;__190

~~v .. I-F=-"~==t:~-

o I I I

1 2 4 6 10 20 40 60 0·1 PARTIC LE SIZE - M I C RON I

CLAY SILT I FINE I M EOlUM I COARSET FINE

I I I I I

0·2 0-4 0" 2 4 6 10 20 40 60 100 PARTICLE SIZE -M ILL IMETRE

SAND GRAVEL fCOBBLES I MEDIUM I COARSE FINE I MEDIUM I COARSE

100 200 .00 600 -u

M(G)368(2of3)

BOULDERS

~(")

OI~

I tIl m --

u z -III III

~ IL

III

UI

~ I-

z III U

0::

III

IL

--------------------

80

70

60

SO

40

30

20

10

0

PARTICLE SIZE DISTRIBUTION CHART

8.S.STEVE 3" 1" 3" 1" 1.." 1" ~"

, 2 - - -16' 8 2 3" 4!." 6" g' '2" 19"24" 36"

2

- ....

1 2

.---- - . -1--"- .-

.... --- .- -----,I----t-- ---- --.. -----

.. --. - .- - .- .. - ..... --- --- 1--- .

. - '.- _._. .- -- - --I-'

-- - --f----.- - -- -.- -.--. .- --~.--

- -.-- _.. .. -' . - _.- - -... . - .--- -- ... - ----._. - - _ ..

- ._.

"-'- -..... I !. ---,-.- --.! ------.-. -- -.. --- --- . _~_I/ .. _ ~ I- - _=-= -,,/'-~ __ '1-- -- .. ~ - . - j-/

-.-- --- f---- l/-.

-- --._ .-=-- . -----_- -=:----.- - - V-·I . ;-V--",~ ..... _._. __ .. _-- .. - .' - -- .-- 1--- -'- . '--'- - / .. - . l/~~

. -.,.'-- ----I"'.~--'~" -:=-_---1- --. . .. - .. - --'- . --.--:--. :: ~£_/ ___ -- . _. >'~". ---~ __ -~- -'--" -- - ... - -_ .. _ .. -' ..

.. - -- 1---- --- - - . ~~ .

'-1- .- / --.. --.- .. -

/!.~ ----~ -- --. --­"/ .

- -- ... - --- - .. --- -- .-.-:. '--"--;/c----'- -., '7 ---. f--- -- "-- .------.. --;,/ . ...>'V

f--- -. ... ... 7 . .... _._.- -

, 6 10 20

.- -_._ .... / ~-.. -~ .,

._E-__ ... - I- - ---- - - -

- -'" -..----- -~---

/'.­

./'/ ;i""'- .. - --'-' ---- -.--- --- .....

I I 1 I

0-2 0-, 0·6 2 , 6

. -

10 20

i- -.- .--f- --

. - 1--- -- 1----

-:-- ._.

1 IJ 1

60 100 200 '00 600 PARTICLE SIZE -MICRON I PARTICLE SIZE -M ILL IMETRE M(G)368(30f3)

II l S 1 L T SAND GRAVEL r .... BOULDERS CLAY I FI NE I MEOlUM I COARSE FINE IMEDIUM I COARSE FINE IMEDIUM ICOARSE I OBBlES

10

20

30

'0

SO

60

70

80

90

100

m I

Ul

"V

'" ,. n

'" z -4 .. en fit

lD

'" -4 .--z

"" 0

'"0 (")

-" !D

--------------------PARTICLE SIZE DISTRIBUTION CHART

9.S.S1EVE .,

" , ]" ," ]" ," !"1" ,.r , 2

.. ---.--.f--._--.- ---- .--- -

10

u I-

z - 60 III 1---III <C(

Q.. 50

'OOr---~--~--~--r---.----'--~r----.--~--r-~--~--~r---.---~r-r-~--~--~w---~--r-r--r-r~A

! '--'V1-:'~ ./. .. ----, ._-. . /. 90~--~~--------~~------+:----~--'~~--~~--4-~---~--------'~--+_~~----+-----+·---+---_--~~--~-:---~-/4-~-_·~~~L4--~_------~---~:~/'---+----+---+_-+-~r-r-,'O ___ _ ,t -_I' -.. / ~~~--- / '0~~~-~-~--~~~-~--+-------~-~------~--~-~--41--+"=-~-----~--------~~---~--"4_--_+~--+_---H~--__ ~'--~--~/~~--~--~--~+--r-+~~.

~I ~:-/ .1. ,./ /...,. -- --- -. "1J

~--~-------4-----4----+--~~---'~~--4--+--------~--------4---+_4_--~----+_~~_+·~/~--~~~i---.~~~----~_+_+--r_+_~30: ----- -. --.----- -' ~- - /./ --.. ---.. -. r/ ~ ~--~--~---+_---------~--~----~~------+_-"~-----------~-------.~---+_4_~t---+-----_+_+/~-~,.~,.-·--~------~~~ J----~~--;_----+~-·---+_--+~-·----r_--~·_1'O ~

- ... ~~ .. +--+~. ~~~~~~.~ ... = l·.······ V-// ;

. - - ---I-- - -

-~ --- ----

l&J

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8.5.51 EVE 3" 1" 3" 1" ].." 1" 11."

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PARTICLE SIZE -MICRON I- PARTICLE SIZE -M ILL IMETRE M{G} 369 {SofS}

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- .'-'.---" -f_-'-

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ClAY t-:F::-:", -.:-:N=E--r~M=:E==O:=;lU~M~~~'"'""='~F~I~N~E~~M~E=-:D:-=-:IU:..::M~-:-C~O-:-A~R~S~E~F~I~N~E=--~~~=-rC~O~AR:-=-::S~E~08BLES BOULOERS ci:

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c( .... AO z III

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20

10

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f-

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8.S.S1EVE

--- ------

PARTICLE SIZE DISTRIBUTION CHART

--- -- - ------- - - -- --

2.." 2.." 2.." 1" 2.. .. 1" 12.." 16 A 8 2.A 2

_ _l_ -_ ----/ - X/--- -: - ---- - '- ~ -/- -- ---+-----.; -. ----- I --

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PARTICLE SIZE -M ICRON I PARTICLE SIZE -M ILLIMETRE

CLAY SILT I SAND 1 GRAVEL

FINE \ M EOlUM 1 COARSE I FINE \MEDIUM I COARSE I FINE I MEDIUM I COARSE

3" 4~" 6" 9"12" 18"24" 36" 2

20

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100

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70

60 ...

50

40

30

20

10

PARTICLE SIZE DISTRIBUTION CHART 3" 1 '.' 3" 1"

16. 8 2 .1." 1" 12.." • 2

/ I ~.,/ ./' .'

/ /

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PARTICLE SIZE -MICRON I PARTICLE SIZE -MILL IMET E M(G)370(4of4) Ut ~

'1 SI LT. I SAND I GRAVEL JC088LES lSOULDERS ~ 0 I CLAY FINE I MEDlUM I COARSE 1 FINE lMEDIUM I COARSE J FINE IMEDIUM J COARSE I ~ I

~l

----------~---------PARTICLE SIZE DISTRIBUTION CHART

8.S.STEVE 1." .1./1 1." .1." 1.." 1" ~ .. 164824 2

100 ,.

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-- -- - . - --90

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ICLAY i 51LT I SAND GRAVEL fc088LES BOULDERS 1 FINE I MEOlUM I COARSE I FINE I MEDIUM I COARSE FINE 1M EDIUM I COARSE

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90

80

70

60

50

40

30

20

10

0 1

8.S.S1EVE

PARTICLE SIZE DISTRIBUTION CHART J" 1"

16 , 3" 1 n

, 2 " 1" 2.. 1" ~.

4 2 3" 41.. .. 6"

2

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PARTICLE SIZ'E DISTRIBUTION CHART 3 " 1" 3" ," 3" 1" - - - - - 1" 1-164824 2

.- .

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SAND GRAVEL N G)

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B.S.S1EVE

---

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FINE 1 ME[)lUM I CO~ FINE

/ f

--- .- I· 'Vl

3" 1" 3" 4.!... .. 6" g' 12" 19"24" 36" 2

2.." 1" 12.. .. 4 2

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SAND G R AV E l '''OBBlES IMEDIUM I COARSE FINE 1M EDIUM r COARSE. f\..

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U1

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80

70

60

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40

30

20

10

PARTICLE SIZE DISTRIBUTION CHART 3" 1 II 3" 1 to

8. S. S 1 EVE 16" , 2 2.." 1" -g." " 2

3" 4.!..." 6" 2 ..

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. PARTICLE SIZE -MICRON I PARTICLE SIZE -MI.LL IME M (G) 373 (lot 4)

SlL T SAND GRAVEL L oaBLES BOULDERS CLAY FI,NE I MEDiUM 1 COA~ FINE IMEDIUM I COARSE . FIN E . I MEDIUM I COARSE I"·

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80

70

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8.5.51 EVE

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M(G)373 (30f4) .... 0 '!'~ UI 1%

lMEDIUM I COARSE - FINE I MEDIUM 1 COARSE ~OBBLES }aOULDERS ~

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--------------------100

90

80

70 u z - 60 VI VI

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10

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PARTICLE SIZE DISTRIBUTION CHART J" 1" J" 1"

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2

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PARTICLE SIZE -MICRON I PART ICLE SIZE -M ILL I METRE _~1(G) 373 (40f4)

lCLAY S1LT SAND GRAVEL

" ... OBBLES BOULDERS FINE J-.MEOlUM_1 CO_A~ FINE IMEDIUM I,COARSE FINE IMEDIUM I COARSE • ____ 4 -,

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90

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8.S.SIEVE

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SILT I FINE I M EDlUM 1 COARSE I FINE

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PARTICLE SIZE -M ILL IMETRE M(G)374 (lof2)

SAND I GRAVEt I""'OBBLES BOULDERS

IMEDIUM I COARSE I FINE !MEDIUM I COARSE I'

--------------------PARTICLE SIZE DISTRIBUTION CHART

8.S.stEVE # 200 41100 #s2 #Js #25 :If 14 )" ," )" 1" 2." 1" ,.;" 4 2 16 4 , 2

0'2 0'4 0'6 2 4 6 '0 20 40 60 100

PARTICLE SIZE - MICRON I PARTICLE SIZE -M ILL IMETRE

CLAY SILT SAND I GR AVEL t .... FINE I M EQlUM I COARSE FINE IMEDIUM I COARSE I FINE IMEDIUM ICOARSE T OBBLES

200 400 600

M(G) 374 (2 of 2)

BOULDERS I ~" NO U1~

I ......

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