HomeMy WebLinkAboutBEAR VALLEY BLK 1 LT 5Valley
Iock:[
Lot
020-43 !
-1!
dcb
1141
14101,091N°S0 e5 68M19
i
_ �• p U1100'09I ALS0,85 69N
�+ N VD g
on
6-1
J tJill
W `i Z
12
IM CD
VA
_ o
Ongg
•
f.•:• N I'}So ern
m N W r' . O �•Z V
i,
61 ...d
CD
ia h as _ • •••-
Lu
�
on 5
En cn
22 on -in
190LLA
Municipality of Anchorage...~,.~.'~
Development Services Department :"~
Ruilding Safety Division
On-Site Water and Wastewater Program, 4700 S. Bragaw SL
P.O. Box 1.c6650 Anchorage, AK 99519-6650 Page
w,~w. ci. anchorage, aKus (907) 343-7~04
ON-SITE WASTEWATER DISPOSAL SYSTEM ANDIOR WELL INSPECTION REPORT
Permit Number: .~'t..~ 0 ~' 00~'1 , PID Number': ' OZ.o.-*/3'1 - II
,~me:/~r',e~,( '~ ~'e~/~.er i~2~',"' WastewaterSystem: ~'New [] Upgrade
NumbarcfBedrccms: I~gDeepTrench rl Sh, a~towTren,.~ i-I 8ed r'l ~,'~d n Oihec
$~'l RatJn~.. Total Dep~ from criGi¢~l Grade:
LEGAL DESCRIPTION I. 2 c~o~ ~.O F,.
Bl¢ck: Lot: S ul:x:livislcn: ~ la FiFe Ix~ttcm from o~g~al I;mde: Gravel de;ih benea~
Township: Range: Secfi~: F'~I added abov~ o~1 ;rade: Gruel Ler~J~
O~vel ~ Number o! ~nes: ) Distance bet'~een r~es:
Well: ~e~' ;n [] New [] Upgrade 5. ,g' Ft. I
Ctass;~cation (Private. A, B, C): Total Depth: Cased I0: Tolal abs~'pt~on area: Pipe Maledal;
Driller. Date Drilled:. StalJc Wale' Level: ~,sta~er. Date Imtalted:
,iel,: j ,amp Set ab j C~s~"~:~v. ~ TAN K
GPMI FLJ FL
SEPARATION DISTANCES [] septic [] Holding [] S.T.E.P. [] Othec.
T~,~"~..~oI Septic Absorption Lift Holding Pul:lic/Pdvate Manufa~ure". Capacity:
Tank Field Station Tank Sev,'erUne ~O¢'AC,~t~/"O,,~'~' '7--g::~ k" I~,J,"~ Gal.
I
Material: Number cf CcmFartments:
S,~,aceWat.r'>.,O0''>.,C~' -- __ ~ / LIFT STATION N.~.
V $¢e: Manufa~ufer,
Let Line 3~)' '~' . ,~ Gal
k 'Pump on' level aC 'Pump ef~ level at:
Cu,'tain Dra;n .... / ~ Pump Make & Model E!ec.,dca! InspecEons perfcrmed by:.
Remarks:
Lcca~Jcn and DesC~;tJcn:
Assumed E!evat~cm
bo. ~,~/e DOc' .Ao~e l oo, o
. Engineer's Stamp
Development Services Dep~rtment Approval~~ °"""'"'°'
;~*~ _ · THEODORE F. IU, OORE ~ ,
PERMIT NO: SW030051
PID NO: 020-431-11
i
N
HONEY BEAR LANE PAGE 2 OF 2
I
I
I
I
L _
SITE FOR SIM. REPL. TRENCH
68 -FOOT LONG-
SOILABS.TRENC ,-' T.H. "J"
w. 7.0' EFF. GVL.
SWING TIES:
-
--'
FROM: COR.
"A”
COR. "B" COR. "C"
„G„
TO:
H
F
FDN C.O. "D"
15'
19'
"E" 1250 -GALLON
S.T. C.O. "E"
12'
31'
SEPTIC TANK
S.T. C.O. "F"
16'
38.5'
„A.,
DBL. C.O. "G"
19'
43'
"D"
TR. C.O. "H"
22'
22'
"B"
-BDRM
TR. M.T. "1"
27'
52'
HOUSE
TR. C.O. "J"
53'
63'UNDER
TBM-�
--C��
CONST
I I
I
I I
I I
I I
I I
I I
I I
I
I I
II
I
II
II
I I
I I
I
I I
I I
I I
I
I I
I I
II
I
BOT. T.H. #1
ELEV. 77.8'
WATER @
79.3'3/13/03
PLAN VIEW
SCALE: 1" = 30'
iL W0
Coll, eo O60000004PO8O a Ba¢:r4.^:
ry r•;
q ,s; ,,�souan°000 000 0000&0U t?07%
THEODORE F. +?1CORE m
C. - :35E39
3' SOIL
COVER
INV.
INV. 93.5'
93.3'
68 -FOOT LONG
SOIL ABS. TRENCH
w. 7.0' EFF. GVL.
BOT. TRENCH
ELEV. 86.3'
CROSS-SECTION
NOT TO SCALE
4' SOIL
COVER
C T,
INV.
93.7'
MUNICIPALITY OF ANCHORA GE
Development Services Department
On-Site Water & Wastewater Program
4700 South Bragaw Street
P,O. Box 196650, Anchorage, AK 99519-6650
(907) 343-7904
ON-SITE WASTEWATER DISPOSAL SYSTEM I WATER SUPPLY PERMIT
Initial
Date Issued: Mar 20, 2003
Expiration Date: Mar 19, 2004
Permit Number: Sw030051
iE~g'al Desc~:iption: Bear Valley Block 1 Lot 5
Design Engineer: 0019 Flattop Technical Services
Owner Name: Brad and Jennifer Benter
Owner Address: 6911 Terrys St
Anchorage, AK 99502-
Parcel ID: 020-431-11
Total Bedrooms: 4
Site Address: 6911 Terry St
Lot Size: 55526 SQ. FT.
Permit Bedrooms: 4
This permit is for the construction of:
[] Disposal Field ~-] SepticTank [~] Holding Tank D Privy
r-~ Private Well
r-~ Water Storage
All construction must be in accordance with:
1. The attached approved design.
2. All requirements specified in Anchorage Municipal Code Chapters 15.55 and 15.65 and the State of Alaska
Wastewater Disposal Regulations ( 18AAC72 ) and Drinking Water Regulations ( 18AAC80 ).
3. The engineer must notify DSD at least 2 hours prior to each inspection. Provide notification by calling
(907) 343-7904 ( 24 hours ). ( Not required for a Water Supply Permit only ).
4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather
must be either: A. Open and closed on the same day.
B. Covered, sealed, and heated to prevent freezing.
Received By: Date:
Issued By:
Date:
Municipality of Anchorage
Development Services Department
Building Safety Division
On-Site Water and Wastewater Program
4700 South Bragaw St.
P.O. Box 196650 Anchorage. AK 99519-6650
www.ci.anchorage.ak.us
(907) 343-7904
ON-SITE SEWER/WELL PERMIT APPLICATION
FOR A SINGLE FAMILY DWELLING
Parcel I.D.
Permit Number SW
Property owner(s) :~r, ,~ ~ ~7'<--.~'~'''
Mailing address (1)
Mailing address (2) ,,~'^
Legal description (Lot, Block & Sub'd.)
Legal description (Section, Township & Range)
Lot Size .~'-~ ~'- ~, Acres/~
Day phone
/'r-~ Zip Code .. ¢,..~o 7..
THIS APPLICATION IS FOR:
Sewer Only
Sewer and Well
Sewer Upgrade
THiS PROPERTY CONTAINS:
Hot Tub
Swimming Pool
Therapy Pool
Number of Bedrooms ~'/
Well Only []
Water Storage []
[-'] Jacuzzi []
E] Water softening Unit []
I certify that the above information is correct. I further certify that this application is being made for a
Single Family Dwelling and is in accordance with applicable Municipal Codes.
Date of Payment:
Receipt Number:
(Rev. 12J00)
(Signature of property owner or authorized agent)
Permit Fees: '¢~, ~,-~---o =
Waiver Fees:
Date of Payment:
Receipt Number:
THEODORE F. MOORE, P.E.
PH: (907) 345-1355
C~ & EN~N~NT~ ENG~EER~G · ENERGY EONSERVA~ON & ~YS~
14530 ECHO ST.
~CHO~GE, ~KA 99516
March 17, 2003
M.O.A. DSD
P.O. Box 19-6650
Anchorage, AK 99519
Dear Sirs:
The purpos?f~,f', thi,s le.tterfis t9 p,rovide the required design narrative.in support of our application for
a permit to constrdct.wastewati~r, di~posal facilities on Lot 5, Block 1, BdarValley S/D,'10cated on
Honey Bear Lane. Soils logs, pert test results, a site plan, design drawings and specifications are
enclosed for your r,eview. We are also requesting a lot line waiver allowing the trench to be constructed
within 1 foot ofth~ lot line ~0m~hon bath Lot 6. ' ' '
The propOg~i'~ystem will be constructed in the vicinity of test hole # 1. As can be seen from the soil
log, the native'material between 1.75 and 7 feet below ground level is silty sandy gravel with a measured
pert rate of 2 minutes per inch. Using the soil application rate of 1.2 gpd/sq, fi. specified in the
wastewater ordinance, this proposed 4-bedroom residence requires a total absorption area of(4 x
150)/1.2 = 500 square feet. The proposed 70-foot long design with 7 feet of gravel beneath the
horizontal distribution pipe has a total effective absorption area of 700 square feet with an additional 280
square feet of absorption taking place below the 7-foot depth.
The topography of the lot in the area of proposed construction slopes down towards the north at a
little less than 25%. The proposed design is intended to maximize the absorption potential within a
single trench thr6ugh the incorporation of two conservative features: First, an additional two feet of
sewer gravel will be placed beloTM the 7-foot depth of the bottom of the'designated absorption stratum..
The additional gravel depth in the underlying siltier material should still provide a significant amount of
absorption, as well as providing void space for the settlement of suspended solids in the waste stream. It
should be noted that, although no groundwater was encountered during test hole excavation or even 3
days thereafter, during a rare midwinter thaw and rainstorm runoff water mn into the depression around
the test hole monitor tube and resulted in a high measured water level of 12.0 feet below ground level on
2/25/03. With the advent of drier weather the water level in the monitor tube has gradually receded,
leading me to conclude that the high measured water level should not be classified as groundwater.
Secondly, we are requesting a waiver allowing the east end of the trench to come within 1 foot of the
east property line in order to increase the longevity, of this soil absorption system. Being more or less
perpendicular to the property line, the impact on future potential absorption systems on Lot 6 is almost
negligible. A similar trench could still be constructed on the adjacent portion of Lot 6 within 10 feet of
the lot line. The proposed project will have no significant impact on present or future water supply and
wastewater disposal systems 'serving adjacent properties, nor will it have any significant impact on
reserved space-surface and subsurface, or on drainage.
Please give me a call at 345-1355 if you have any questions on this submittal.
Sincerely,
Ted Moore, P.E.
.- ,, 10( - ~,
/' ~'q~.'---'~'~'~.~. _ "~, ..'" HONEY BEAR LANE ~',
SllE FOR 60-FT ",
/ / ~ i /~--- REPLACEMENT TR. ',..
II i =---- ......... / .J
so~ ^~s. TRENCH
W. 7.0' OVL. ~ELOW
'~_ INSTALL 1250-GALLON
' ' ' '-SEPTIC TANK
, CT 6
LOT 4
.. ', IPaOPOSEDA
r~ \, /WELL SITE -
~.-"....':,';'-~ I
LOT ~, BLOCK ~, BEAR VALLEY
PROPOSED WELL AND ~EPTIO SYSTEM
81TE
F~OP ~C[~ICAL SERVICES 1 INCH = 50 FEET
14530 ECHO ST~ET D~WN BY TFM
ANCHO~GE, A~S~ 99516 ~ROH 2003
NOTE: THIS IS NOT A SURVEYED P~T.
ALL LOCATIONS SHOWN ARE APPROXI~TE.
LIMIT OF TRENCH EXCA VATION--~ "A" ~ 4" DIA. F-810 PERF. PIPF ~
7o __ __: __~__ _
' C.O. ~ 1~ M.T. C.O. ~'
I TE.E, INTO PERF. PIPE ~
"A" ~<50 FROM EITHER END DBL.
C.O.
PLAN VIEW
SCALE: 1" = 10'
1250-GALLON
SEPTIC TANK
4" DIA. D-3034
FROM HOUSE
MONITOR TUBE
JT
MOUND BACKFILL 6"
3
7.5 7
,,%~, '~ ·
GROUND
RIGID INSULATION
FILTER FABRIC
4" DIA. F-810 PERF. PIPE
- 2 1/2" SEWER GRAVEL
OF EXCAVATION
CROSS-SECTION "A - A"
SCALE: 1" = 5'
LOT 5, BLOCK 1, BEAR VALLEY S/D
SEPTIC SYSTEM CONSTRUCTION
PLAN AND CROSS-SECTION
FLATrOP TECHNICAL SERVICES SCALE: AS SHOWN
14530 ECHO STREET DRAWN BY: TFM
ANCHORAGE, AK, 99516 MARCH, 2003
TEST HOLE
LEGAL DESCRIPTION:
DATE PERFORMED:
PERFORMED FOR:
FLATTOP TECHNICAL SERVICES
14530 ECHO ST.
ANCHORAGE, ALASKA 99516
SOILS LOG -- PERCOLATION TEST
Lot_5,_Block 1. Bear_V_alley_S/D
January_28, 2003
Brad and Jennifer Benter
DEPTH
(feet)
GP/GM
GM
Gray silty sandy gravel
Lenses of GP above 4'
Hard digging throughout
Gray silty gravel
Siltier than above 7 feet
SLOPE
SITE P~N
HONEY BEAR LANE
lO
18--
19--
20--
B.H.
Depth to Groundwater Date
No Groundwater 1/28/03
Monitor tub~e d_Cry 1/3-1703
Water 12.0' b.g.I. 2/25/_03'
---W~;4TO'_b._g I. 3/4/0_3
Water 16.0' b.g.I. 3/j3L03
Date Reading Clock Net Time Percometer Net Drop
Time (minutes) Reading (inches)
1/28 12" Presoak 27 1/2
12" Resoak 27_112
Add water & start 12:09:30 23 3/8
#1 12!-1-4730 5 i i9-5/8 3,3/4
Add wa_t_e r 12.1--5 23~i8
#2 12:_20 5 19 5/8 3~3/_4
Add .water 12:_20:30 23~3/8
#3 12:_25:30 5 19.5/8 I 3 3/4
PERCOLATION RATE 2 (minutes/inch) PERC HOLE DIAMETER 6"
TEST RUN BETWEEN 5.0 FTAND 5.5 FT
COMMENTS: * WaterJeyeLobse ~yedJn_mooJtor tube_wasj~mbably.ettdbutableJo_midwinte r t haw_a nd_rainst hat_washedJnto~epmssion
PERFORMED BY FLATTOP TECHNICAL SERVICES. IJ.J.__~ CERTIFY THAT THIS TEST WAS PERFORMED IN
ACCORDANCE WITH ALL STATE AND MUNICIPAL GUIDELINES IN EFFECT ON THIS DATE. DATE: ~> / / '7 / ~::~..~
G~t~p Tec~n~alSem6r. es
14530 Bc~o Street, AnchoraOe, AK 99516
Plume (907) 345-1355
Lot 5, Block 1, Bear Valley S/D
Honey Bear Land
NVastewater disposal system installation
Specifications
1.0 General:
1.1 The scope of the project consists of installing a 1250-gallon septic tank and constructing a 70-
foot long soil absorption trench containing a total of 7.5 feet of sewer gravel.
1.2 Construction shall be as depicted on the approved site plan and design drawings. Minor
deviations from these drawings may be allowed or required by the engineer conducting the inspections.
All construction procedures and material specifications shall conform to Municipal and State
requirements. All separation distances shall be in conformance with Municipal requirements, unless
specifically waived. The east end of the trench shall be no closer than l foot from the east property line.
1.3 The contractor shall be responsible to obtain any necessary utility locates, and to work around
any buried utilities.
1.4 The contractor shall provide adequate cover material and rough grading over all system
components to ensure that proper drainage is achieved after settlement and that there are no residual
depressions. Insofar as possible the contractor shall minimize damage to trees and existing lawn areas.
1.5 Unless specifically agreed otherwise, the homeowner shall be responsible for finish grading
after the soil is compacted, as well as placement of topsoil and reseeding all areas disturbed by the
construction.
2.0 Septic Tank:
2.1 The new 1250-gallon, 2 compartment septic tank shall be Municipally approved and shall be set
level on undisturbed soil. Each compartment shall be equipped with a watertight manhole cover and a
4" cleanout. If the tank is buried less than 4 feet, it shall be insulated with 2 inches of approved burial
type, rigid insulation.
2.2 All pipe connections to the tank shall be equipped with waterproof mechanical couplings. The
waste line from the residence to the septic tank shall have a minimum slope of 1/4'" per foot, and the
waste line between the tank and the soil absorption system shall have a minimum slope of 1/8" per foot.
A cleanout shall be installed 1 - 4 feet from the building foundation, and a double cleanout shall be
installed within 5 feet downstream of the septic tank.
3.0 Soil absorption system:
3.1 The soil absorption system shall be constructed by excavating a 70-foot long trench to a depth of
9 feet below ground level. The long axis of the excavation shall parallel an existing contour
3.2 The bottom of the excavation shall be level. Any compacted or smeared surfaces shall be raked
to allow proper infiltration. Sand for leveling or serving as filter material shall comply with Municipal
specifications.
3.3 A total of 7.5 feet of approved sewer gravel shall be placed in the bottom of the excavation with
the perforated distribution pipes laid level such that the pipe inverts are no less than 7.0 feet above the
bottom of the sewer gravel. Sewer gravel shall be 0.5" - 2.5" screened gravel, with less than 3% passing
the #200 sieve.
3.4 Monitor tubes and cleanout pipes shall be of 4" diameter and installed in the locations shown on
the design drawings. The portion of the monitor tube extending through the sewer gravel shall be
perforated.
3.5 Approved filter fabric shall be placed over the entire top surface of the sewer gravel. A
minimum of 2 feet of soil cover is to be placed over the filter fabric. If the soil cover thickness is less
than 3 feet, two inches of rigid, burial type insulation is to be placed over the entire top surface of the
gravel, in addition to the filter fabric.
3.6 The top surface of the cover material shall be raised a minimum of 6 inches higher than the
surrounding terrain to allow for subsequent settlement, and shall be graded to smooth contours. Fill
slopes shall be no steeper than 3:1.
3.7 Unless specifically agreed otherwise the homeowner shall be responsible for arranging to have
the site finish graded after the backfill material has stabilized, and for placement of adequate topsoil and
seed to promote rapid revegetation of all areas disturbed by the construction.
4.0 Inspections:
4.1 A total of 4 engineering inspections will be required during the course of the project: (1) initial
stakeout with the contractor to establish the location of the system and to discuss the plans,
specifications and construction procedures, (2) after the native material has been excavated to expose the
infiltrative surface to ensure that it is level and at the right elevation, and conforms with the soil test
information, (3) after the sewer gravel is in place and the distribution pipes have been laid and connected
up to the septic tank, but prior to placement of insulation or filter fabric, and (4) after rough backfill and
grading is complete. The septic tank requires one inspection after it is set level and the piping
connected, but prior to backfill. This inspection may be incorporated with any of the above inspections.
4.2 The installer shall coordinate the timing of the inspections with the engineer sufficiently far in
advance to ensure the availability of the engineer.
ill-America Ci~
George I: Wucrch,
Ma!lor 2002
4/11/2003
Ted Moore
Flattop Technical Services
Subject:
Waiver Request for 1 ft Lot Line
Waiver Request #WR030027
Parcel ID #020-431-11
Dear Ted Moore:
Your request for a waiver of the required 10 feet horizontal separation from the
absorption field to property line has been approved. The approved separation distance is
1.0 feet.
This waiver approval applies to the existing absorption field to property line separation
only. Any future upgrade to the on-site wastewater disposal system will require all
separation distances be met or another approval from this department.
If there are any further concerns or questions regarding this waiver, please call our office
at 343-7904.
Sincerely,
& Wastewater Program
P.O. Box 196650 · Anchoragc, Alaska 99519-6650 · Tclcphonc: (907) 343-8301 · F,mx: (907) 343-8200
4700 South Bragaw Strcct ° Anchoragc, Alaska 99507
http://www.ci.anchoragc.ak.us
