HomeMy WebLinkAboutBIRCH WOODS General Information Tract B
,-.,, & ENGINEERS, INC.
"' $
~ 7125 OLD SEWARD HIGHWAY · ANCHORAGE, ALASKA 99502
An-Cot, Inc.
Attn: Greg 3ohnson
7#1 Sesame Street
Anchorage, AK 99503
Re: Soil Investigation for Lots I through 5, Birch Woods Subdivision
Dear Mr. 3ohnson:
On June 7, 1983 S&S Engineers Inc. conducted an investigation on the subject
property for the purpose of classifying soil types, recording ground water levels and
determining foundation criteria.
The property is located directly south of the .intersection of .New Birchwood Loop
Road and Old Birchwood Loop. Road. All five lots suPport-'a mixed stand of birch and
white spruce. A small stream runs northwest across the sOuthwest corner of the property.
Five test holes were drilled on Lots l-through 5 by Alaska Geotechnical Drilling
Services Inc. The test holes were terminated at various depths, and the locations are
shown on the attached soil log location diagrams. The holes were drilled with a CME 55
drill mounted on a FN 60 Nodwell) using 8" O.D. hollow stem auger. Samples were
obtained with a 1.#" I.D. split-spoon sampler diven with a l#0-pound drop hammer) having
a 30" free fall. The sampler is driven below the auger bit and the penetration resistance~
as measured by the blow counts per foot, gives an indication of relative density of the in-
place natural soil. Samples Were taken at various depths and were classified in the field
by an Engineering Geologist. Please see the attached soil logs for further detail.
One test hole was drilled on each lot in order to determine the soil types~ relative
density and to install observation wells for future water level readings. The locations of
the drilled test holes were based on information obtained from a previous soil
investigation~ consisting of eleven test pits dug with a backhoe. The investigation was
performed by S&S Engineers Inc. during April 1'983. The five test holes were drilled in
areas most suitable for on-site sanitary sewer systems.
TH's 1, 2, 3 and ~ have similar profiles. In summary, gravel with some sand, tace
silt and scattered to numerous cobb~were found overlying silty sand. The depth of
gravel varied from 8.5' in TH-2 to I/3.5' 1~ TH-#. No sand was encountered in TH-O. The
profile for TH-5 was brown silliy sqtnd from 0.0' to 7t5' over gray, silty sand with some
gravel. The Unified Classification Varies from (~W-{IP to SM .These soils are adequate
WAS I LLA AN OH ORAG E SOLDOTN A
(907) 376-3770 (flO7) 349-6561 '< (907) 262-9534
Birchwood Subdivision
Page 2
Free water was found in all ol the test holes. Two-inch ABS pipe was installed in
each hole after drilling for Iuture monitoring. On July 13, 1983 and on August 16, 1983,
the test hole sites were inspected for changes in surface runoff and the observation wells
were monitored. Two of the observation wells were not read on July 13. Both missing
wells were recovered by excavation on August 16, I983. The observed water levels are
shown below. The monitoring program and the two previous geological studies show that
the water levels I~ave remained reasonably consistent. In general~ the water levels are
such that they may preclude trench systems, but bed systems can be utilized.
,, 5// %0. %0,
l~ / t0.0' / / / 9.0' j 9.0' ~
1~ l/ %0' / / / noreading/ None * J
~ ~ ~0.0, // / ~o~ / No~* /
/
The maximum allowable soil bearing capacity (Qa) which can be utilized for
foundation bearing design is 2000 psf.
This report was based on the interpretation of the subsurface soil conditions at the
test hole locations only. Soil and water conditions may vary between the holes.
If any problems occur during construction or should there be any questions regarding
this report, please do not hesitate to call us at 3t49-6.56i.
Respectfully submitted~
S & S Engineers~ Inc.
E. P, ichard Rahaim
Engineering Geologist
ERR:sc I
Job 3312
SS~S'I~.NGINEERS, INC. .STARTED .,'"~..,-J/7/, '~ .. HOLE NO, .,/~.--. '
PROJECT NUMBER ~-"~,,~ J~ FINISHEO. ~/~~ SHEET~.QF.
~ROJECT TI~E ~,~ ~, LOCATION / / ~D.
GEOLOGIST - ~, /~ , ,. , , GROUND WATER ,
CREW ~~ ,~/~)j/~ si'TN DESCRIPTION ~p ~,' ~c L , ~ WHIk[ Ppi;UNO AF~ERDEI~UNG
RIG
~ ~ .< ~ ~//~~
METHOD ~ ~/'//--~ ~ TIME
~"~. ~//~ ~.,~ ~r~ ........... D~TE ~/7/~ ..........
LOCATION DIAGRAM ~
- o - ~ ,
U ~ Z -- ~ ~0
fi ~ ~ ~ ~ ~ U , m , m m ,
- - 2 - ~t~ - ~ ~,'~/ G ~/~_~ '
- - ~'~l _ ,,
·
- - 9 ~
- ' ~ I -
6-
-- 0 -
~ OR6ANIGS SILT BEDROCK S.R. SAMPLER REFUSAL
GRAVEL OLAY A.R. AUG[R R[FU~AL s~' 2J' SPUT S~ON ~/340L~ H~M
~. - ~ WATER C · AUGE~ CUTTING
.......":Y':: .... SA~ ~ ICE A: SAMPL( FNOM AUGER
S~S'EN(~tNEERs. INC. I so,, ~..s~,~.~,o ..~ .o.~
'PROJEC'¢ NUMBER .'"~'/.~ _ FINISHE~~/~gg~ SHEET
~ROJECT TIT~ ~,~.I~~ ~ LOCATION ' '
~o~o~,~T'~'~~X~ ~ . '''~~ ~.o~.~ W~T~. ....
METHOD ~ .$.~ ~f,'// / TIME
~ LOCATION DIAGRAM ~.~.~,~ ~ .
~ ~ ~ " ~ u .......
~ -o- ~¢ '
-~- ~ t -
- 5- ~ -
_ 9.~ ~P-
7 - ~'
-- 0
~ ORGANICS SILT BEDROCK S.R. SAMPLER REFUSAL
GRAVEL CLAY A.R. AUGER REFUSAL SP,2$'SPUT SPOON
WATER C" AUG~ EUTTINO
'::'::: SAND A ~ ~A~PLE F~OM AUG~R I.D.
':.,,. ~ ICE
pROJECT NUMBER ~J~ ' FINISHE~
METHOD ~.~ ~;]] I ' TIME
~ L~CATION DIAGRAM
2-
4-
_ _
-- 0
~ SAMPLING METH~
GfiAVEL GLAY A.~. AUG~ fiEFUSAL sp, 2~' SPLIT SPOON W/340Li H~R
......~ ~'~~ WAT~fi C · AUGER CUTTING
S 8~S' ENGINEER SOil ~ STARTED -' ~"/?/ ; HOLE
PROJECT NUMBER ,'"~;,_~ ,,/,.~ FINISHED_ ~,?/d/~ SHEET ,
~ROJECT TIT~ ~/~ ~ ~. LOCATION ~D. ~'
- o- ~+-
- 3- .~.~
. -_ ~ I I -
6- ~
8 - 'o~,
9 - ,~
~o ~r. ~ ~ ~r, ti,'~ i
-i~ -~.~ ~'
6-
~ 0
- ORGANICS SILT BEDROCK S.R. SAMPLER R[FUSAL
GR~VEL CL~Y A.R. AUGER REFUSAL ~.~"~u~oou w/~4oL~
:' ~ WATER c, AUGEE CUTTING
PROJECT NUMBER '~k.~,/,.~
CREW ~ ~.~+ . ~ ~d.~ SI'TE DESCRIPTION ~f~ ~1'/. ~. WH,Lt Dm:UNG A~,ER ~R,LL, NO
~ LOCATION DIAGRAM .//
~ ORGANICS SILT BEDROCK S.R. SAMPLER REFUSAL
~ SS~1.4' SPLIT SPOON W/14OL~ HAMMER
GRAVEL CLAY ~ A.R. AUGER REFUSAL SP'25"SPLIT SPOON
WATER C · AUGER CUTTING
Opon Pit
q
2~.1 b
y
I
!
C)~-~on t> [ t
~ ,,....:: ..~ Jim Smvb5 ] 1
%)!~ Soi 1
] :Io I e )
Gravel
Itole ~4 )
~ n--'d Grave]
~St.e' WaLe
hol
C] g~v
1--2.5'
I
,-I- A ~ -
1-<t. 5 ' Mi nu ~ ......... £o.~ .................~
Wa!er at 7'
5-2 5'
'"-/ I
]
1]
3
4
6
7
8
9
12
13
t4
18
19
20
Rrmding Date Gross NoT ' Depth lo Net
Time Time W;~ler 1 Drop
PERCOLAI'ION RATE
F I' AND
TEST RUN RETWEEN
(6/79)
·
~,I i Er)
1
2
3
4
5
6
7
8
9
10
11
12
13
WAS (;ROUND WATER
ENCOUN EERED?
IF YES, AT WHAT
14
15
16
17
18
19
2O
7 2 -',') 0 8 (6/79)
Depth to l'~el
Water Di OD
Reading Dale O~oss Net
Time Time
............ DATE:
'I
F:7~ ! Ctr~-'t ?,,ch~,, .:u'*, .\!-*ska .... 01 ~ 4/20
':.'f){f S I.OG i'*:~HCOI..^,';~ixJ I I:S¥
coM M L- i",I '1' S
Iq-I~COLA rlor~ RArE ............ (minul~:s/ir~ch)
DATE:
1
R75 I_, ~t,'~'l, ,'",nchr,,(:e, ,'.! "a '3!~()1 ::,~'I 4i20
17
19
20
[_
'J I-
WAS GROUND WATER
ENCOUN]ERED?
IF Y[~S, AT WHAT
{)[~P'FH?
I'Madin§
Time
Net 'Depth to
Time Water
i:O ,~ vIEN l'S .......... i 'i ..
Net
PERFORMED BY: ...........................
/2-008 (6/19)
,f
1
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
2O
t?NCOUN'[ERED? . _oL - - . .._ _.
Reading Gross ................
...... Time Water
22008
¢
' ~l . ",' q r~" .;,
] ,-:-,--
6
ENCOUNI'ER ED?
13 DEPTH?
14
15 ._ ~ ........ Time Time Water
17 ................. _
18 ............ '.
20 ........ .
PF i<COLA 110¢~ RAlE ..... .... (mit~ut,,s finch)
r:s'l RUN
PERFORMED BY: ~ ' -
.......................................... CERTIFIED By:
--- OA rE:
72 008 {6/79J
3
8
10
12
13
14
15
16
':X t? _ 'i, ~
F'ERFOP, ME D BY:
'2-oo8 (O/zgj
WAS GROUND WA-I ER
ENCOUN'FE {ED7
IF YES, ATWIfAT
D _: ~ FH?
Reading Date Gross
Time
I'ERCOI_A l ION RAJ E
'rEST RUN BETW£-EN
Net
Time
....... FT AtVD .... FT
Depth to
Wdter
Net
Drop
'1
I
5
6
?
8
9
10
11
12
13
14
15
16
17
18
19
20
IF YES, AT WHAT
D E P 'r H ?
Reading
Date,: Gross Net Depth to Net
Time Time Water ID~ Dp
Pr NC()I A ¥tO~J ~:;A T E
'TI:Si' RUN Bf:IWFF. I~ ..... t I qND ..... FT
!-,,.~- [:/., ( '~;',
BY: ............................. CERTIFIED BY: ............. DATE:
7 :~-008
WAS GROUNDWA1-ER
Et,,ICOUN1 ERED7
IF YFS, A'r WItAT
l_b C ~TIt?
Reading
Date Gross inlet Depth to Net
Time Time . j Wa~er [~ r o1'~
................ 0AIE:
008
r '-/-:,l l)t .
I
2
4
8
10
11
12
13
t4
1.5
17
18
19
2O
WASGR(-)LJND WA1ER
ENCOUN I
IF Yi~S, A'I WHAt'
DI~ P 1' H ?
Reading
4
~,~ Gross Net I Depth to Net
u.,~ Time Time [ Water · D~op
PERFORMED BY: Ci;H'I-IFIffD BY;
72-0'38
. _ t T AtxO ....... F T
........... f)AIE:
MUNICIPALITY OF ANCHORAGE
Departmen 3f Health & Environmental £otection
Environmental Health Division
Case Review Worksheet
Case Number
S-7016
Date Received
April 27, 1983
Subdivision or Project Title:
Lots 1 - 5 Birch Woods Subdivision
Comments Due By
May 18, 1983
( ) Public water available ( ) Public sewer available
( ) Commun~.ty water available
Comments:
P
MUNICIPALITY OF ANCHORAGE
Departmen of Health & Environmental rotection
Environmental Health Division
Case Review Worksheet
Case Number
S-6886
March 15, 1983
Comments Due By
April 1, 1983
Subdivision or Project Title:
Birch Woods Subdivision
Comments:
( ) Public water available
( ) Community water available
( ) Public sewer available
7
8
9
10
11
12
13
14
16
17
18
19
20
WAS GROUND WATER
ENCOUNFERED?
IF YES, ATWIiAT
DEl'TH?
R~;ading
OPE
L
Net Depth to Net
Time Water D~op
PEP~CO LA 1' tON RATE .....
-lEST RUN BEiWEEN ......... FT AND
COMM i: N'FS
PERFORMED BY: CER'IIFIED BY: DARE:
12-008