HomeMy WebLinkAboutT14N R2W SEC 11 LT 54 LESS N 150'T14N R2W
Sec 11
Lot 54 Less N 150'
#050-261-23
On -Site Wastewater Disposal System Permit
MUNICIPALITY OF ANCHORAGE
Development Services Department
On -Site Water & Wastewater Program
4700 Elmore Road, PO Box 196650
Anchorage, AK 99519-6650
Telephone: (907) 343-7904
Permit Number: OSP161263
Tax Code Number: 05026123000
Work Type: Septic Initial
Permit Effective Dates: September 26, 2016
to September26, 2017
Design Engineer: ANDERSON ENGINEERING
Subdivision: T14N R2W SEC 11
Site Legal Address: T14N R2W SEC 11 LT 54 LESS N 150' G:0051
Owner/Address:
TROY DAVIS HOMES INC
1689 KNIK GOOSE BAY RD STE 400 WASILLA AK 996547059
Site Mailing Address: 10309 VFW RD, Eagle River
Lot Size in Sq Ft: 43858
Total Bedrooms: 4
This permit is for the construction of:
Y Disposal Field Y Septic Tank N Holding Tank N Privy N Private Well N 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 wastewater code requires inspections during the installation. The engineer must notify the Development Services
Department at least 2 hours prior to each inspection. Provide notification by calling (907) 343-7904 (24 hours).
4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather must either:
A. Open and Close on the same day.
B. Covered, sealed, and heated to prevent freezing.
IsSpecial Provisions: Construction may proceed prior to 7 day ground water monitoring at your own
risk.
Received By:
Issued By:
ore, pricy P/346
CO -4'f /%7'6 Chun d f eid
9` o negfa tori oF' ���5
Date: °Ratifier
Date: (/ 6/�
MUNICIPALITY OF ANCHORAGE
Community Development Department
Development Services Division
On -Site Water & Wastewater Program
ON-SITE SEWER/WELL PERMIT APPLICATION
Parcel I.D. 050-261-23-000
Property owner(s) Troy Davis Homes, Inc Day phone 250-4989
Mailing address 1689 Knik Goose Bay Road, Suite 400, Wasilla, AK 99564
Site address 10309 VFW Road, Eagle River, AK
Legal description (Sub'd., Block & Lot)
Legal description (Township, Range & Section) T14N R2W SEC11 LT54 LESS N 150'
Lot Size 43,858 Sq. Ft. Number of Bedrooms 4
APPLICATION IS FOR: APPLICATION IS AN:
(Lf all that apply)
Absorption Field ❑X Initial
Septic Tank ❑X Upgrade
Holding Tank 0 Renewal
Privy ❑
Private Well ❑
Witer'Storage ❑
¥#& le
THIS APILICATION INCLUDES A VARIANCE / WAIVER REQUEST FOR:
❑X
TYPE OF DWELLING:
Single Family (SF)
(w/wo ADU)
Duplex (D)
Multiple Dwellings
(SF and/or D)
Distance:
I certify that the above information is correct. I further certify that this is in accordance with
applicable Municipal Codes.
( ure
operty owner or authorized agent)
Permit/Rush Fees: "/b 46 Waiver Fees:
Date of Payment: UbJrl/t'D Date of Payment:
Receipt Number 0 1?06 Receipt Number:
Permit No. OSPl &l a4,3 Waiver No.
Permit App_.:- :L�
ANDERSON ENGINEERING
P.O. BOX 246773
ANCHORAGE, AK 99524
522-7773 677-7766 (FAX)
September 12, 2016
Municipality of Anchorage
Development Services Dept- On -Site Water & Wastewater Program
4700 Elmore Rd
Anchorage, AK 99507
Subject: T14N R2W SEC11 LT54 LESS N 150'
Septic system design and permit application
Dear On -Site Services Engineer:
The owner of the above lot intends to construct a 4 -bedroom home on the lot, so we are
submitting this permit application for the construction of a new septic system. The lot currently
has an existing foundation, well, and septic system. The foundation and well will be used for the
new home, but the septic system will need to be abandoned and a new system constructed. The
attached site plan identifies the location of the home, existing well, and existing septic, as well as
the proposed septic location and alternate site. No conflicts exist between this proposed system
and any wells, whether on this lot or adjacent lots. Drainage arrows are shown on the site plan
showing the grade and direction of flow. The drainage pattern in general will not be changed by
the construction.
The test holes placed on the lot indicate silt with sand and gravel mixed in (GM). Groundwater
was found down at 12' and 14', and when checked later had risen as high as 7.5'. The
percolation rate was determined to be around 1-2 min/in An application rate of 1.2 gpd/sf was
used in the design of the absorption system. We are proposing to place a new 1250 -gallon septic
tank with two shallow absorption trenches 5' wide x 38' long x 1.5' effective depth. The
elevation of the distribution line will be 1' below the surface for a total depth of 2.5! Soil will be
mounded 1.5' above the trenches A minimum of 2" of insulation and 2' of fill will be placed
over the absorption trench and 4' over the septic tank.
The ground surface on the lot in the area of the septic system is relatively flat with a slight slope
to the southeast. The new trenches will be constructed parallel to the slope as much as possible.
They will be a minimum of 100' from all wells and surface water. There is a stream on the lot to
the south, on the other side of the driveway access to this lot (and the lots to the east). The new
trenches will be more than 100' away from this stream.
There are no records for the existing septic system. The absorption field appears to be located
where there are two existing PVC pipes in the ground. The new trenches must be a minimum of
10' from the abandoned field. If, during excavation, the field is discovered to extend beyond the
estimated size to be within 10' of a new trench, that portion of the drainage rock must be dug up
and replaced with soils from the site.
If the system is constructed as designed, it will have no adverse impact:
• On the wells in the area or those to be constructed in the future.
• On existing septic systems in the area or those to be constructed in the future.
• On reserve space, either surface or subsurface, on any lots located in the area.
• On drainage patterns in the area. The current drainage pattern will be maintained.
Sincerely,
Benjamin Schiller, PE
]91 1 ' .
••.MN.•.••••y
I War;
CE 92 .•• a
,_110rass0,.%.4*
:%\
0r
\(
Z>
Fq
°
q §
v1:11:
s ±i
z >0
%
0--
2
[
y«.
.,0c. m :
K
\ /
y yz
>
S GV 11]M
%
T14N R2W SEC11 LT54 LESS N 150'
DESIGN FACTORS:
600 GPD Peak Flow
Perc. Rate: 1-5 Min./Inch
Application Rate: 1.2 GPD/SF
SYSTEM REQUIREMENTS:
5' Wide Shallow Trench System
1,250 Gallon Septic Tank
600 GPD / 1.2 GPD/SF / 5 SF/LF * 0.78 5' WIDE REDUCTION = 78 LF Trench Length
THEREFORE: Construct 2-39' Long x 5' Wide x 1.5' Effective Depth Absorption Trenches.
Flow Line Elevation in Trenches to be 1' Below Original Ground Surface. Total Depth to be
2.5' Below Existing Ground. Provide 2' Cover And Insulation Over Absorption Trenches and 4' Cover Over
Septic Tank. Place Flow Splitter Valve to Insure Even Flow to Each Trench.
1'-6'
4' TO GROUNDWATER
6' TO BEDROCK
1'-6"
/Insulation
5'
4" Perforated
PVC (Holes Down)
Drainfield Rock
a *. 49111 1' e
i
IC"" c /�.ra.......». -
a s :Beni to J Schiyn a
CE -1z592 Zri
TYPICAL 5' WIDE TRENCH SECTION
NOTE:
(NO SCALE)
Grade Area Over Trench to Drain Away.
Minimum 6' Separation From Bedrock.
Minimum 4' Separation From Groundwater.
Minimum 100' Separation From Nearby Wells.
Minimum 100' Separation From Surface Water or Streams.
MUNICIPALITY OF ANCHORAGE
DEVELOPMENT SERVICES DEPARTMENT
4700 ELMORE ROAD ANCHORAGE, AK 99519-6650
DEPTH
(feet)
1
2
SOILS LOG - PERCOLATION TEST
LEGAL DESCRIPTION: T 14N R2W SEC11 LT54 LESS N 150'
PERFORMED FOR: TROY DAVIS HOMES
DATE: 8-24-2016 PROJECT No
PARCEL ID#: TECHNICIAN: W. ROBERTS
3
4
5 -
6
7
8 -
9
10-
11
12
13-
14
V
15
16
17
18
19-
20
TEST HOLE 1
OB/OG
YELLOW SILT IN/ GRAVEL
GM
GRAY SILT/SAND WITH SOME GRAVEL
BOH
COMMENTS• -
WAS GROUND WATER ENCOUNTERED?
IF YES @ WHAT DEPTH?
DEPTH OF WATER AFTER MONITORING:
DATE OF MONITORING:
SLOPE
YES
12'
11.5'
9-9-2016
•
01(49TH i\.*4
'
ll Benj in Schiller
AE
tIFBF�5,2010
PROF •. 12592 �
Professional Engineers Stamp:
SITE PLAN
SEE SITE PLAN
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH TO
WATER
(INCHES)
NET DROP
(INCHES)
8/24
TEST HOLE PRESOAKED PRIOR TO TESTING:
1
3:17
0:00
0"
2
3:23
6:00
(DRY)
4"
3
3:24
0:00
0"
4
3:31
7:00
(DRY)
4"
5
3:33
0:00
0"
6
3:40
7:00
(DRY)
4"
PERCOLATION RATE:1.75 (MIN/INCH) PERC. HOLE DIA. 6 (INCHES)
1hST RUN BETWEEN: 4 FT. and 5 FT.
TEST PERFORMED BY ANDERSON ENGINEERING. I, BENJAMIN SCHILLER, CERTIFY THAT
THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS
DATE: AUGUST 24,2016
MUNICIPALITY OF ANCHORAGE
DEVELOPMENT SERVICES DEPARTMENT
4700 ELMORE ROAD ANCHORAGE, AK 99519-6650
DEPTH
(feet)
1
2
3
4
5
6
7
8
9
10
SOILS LOG - PERCOLATION TEST
LEGAL DESCRIPTION: T14N R2W SECII LT54 LESS N 150'
PERFORMED FOR: TROY DAvls HOMES
DATE: 8-24-2016 PROJECT No •
PARCEL ID#: TECHNICIAN: W. ROBERTS
11-
12
13-
14-
15-
16
17-
18-
19-
20
TEST HOLE 2
OB/OG
YELLOW SILT W/ GRAVEL
GM
GRAY SILT/SAND WITH SOME GRAVEL
BOH
COMMENTS- -
SLOPE
WAS GROUND WATER ENCOUNTERED' YES
IF YES @ WHATDEPTH' 10'
DEPTH OF WATER AFTER MONITORING: 7.5'
DATE OF MONITORING: 9-9-2016
r P•'
*:49 A\ •.*�0
frli t B9✓r,Aijimin Schiller if
.
t11F\FDPROFESS10Na�' r
Professional Engineers Stamp:
SITE PLAN
SEE SITE PLAN
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH To
WATER
(INCHES)
NET DROP
(INCHES)
TEST HOLE PRESOAKED PRIOR TO TESTING:
PERCOLATION RATE(MIN/INCH) PERC. HOLE DIA. (INCHES)
TEST RUN BETWEEN: FT. and FT.
TEST PERFORMED BY ANDERSON ENGINEERING. I, BENJAMIN SCHILLER, CERTIFY THAT
THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS
DATE: AUGUST 24,2016
MUNICIPALITY OF ANCHORAGE
DEVELOPMENT SERVICES DEPARTMENT
1.700 ELMORE ROAD ANCHORAGE, AK 99519-6650
DEPTH
(feet)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
PERCOLATION TEST
LEGAL DESCRIPTION: T 14N R2W SECT I LT54 LESS N 150'
PERFORMED FOR: TROY DAVIS HOMES
DATE: 9-21-2016 PROJECT No •
PARCEL ID#: TECHNICIAN: W. ROBERTS
PERK TEST 2
SLOPE
WAS GROUND WATER ENCOUNTERED,
IF YES ® WHAT DEPTH'
DEPTH OF WATER AFTER MONITORING:
DATE OF MONITORING
Benj •u in Schiller
#1 -*•P••. AEmLs12.2592 .. 7r
k�ki P OFES510NP�
Professional Engineers Stamp:
SITE PLAN
SEE SITE PLAN
DATE
READING
GROSS TIME
(MINurEs)
NET TIME
(MINUTES)
DEPTH TO
WATER
(INCHES)
NET DROP
(INCHES)
9/21
TEST HOLE PRESOAKED PRIOR TO TESTING:
1
2:08
0:00
0"
2
2:18
10:00
3.60"
3
2:19
0:00
0"
4
2:29
10:00
3.80"
5
2:30
0:00
0"
6
2:40
10:00
4.25"
PERCOLATION RATE:2.7 (MIN/INCH) PERC. HOLE DIA. 4 (INCHES)
TEST RUN BETWEEN: 4 FT. and 5 FT.
COMMENTS.
TEST PERFORMED BY ANDERSON ENGINEERING. I, BENJAMIN SCHILLER, CERTIFY THAT
THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS
DATE: SEPTEMBER 21, 2016
MUNICIPALITY OF ANCHORAGE
DEVELOPMENT SERVICES DEPARTMENT
4700 ELMORE ROAD ANCHORAGE, AK 99519-6650
SOILS LOG - PERCOLATION TEST
LEGAL DESCRIPTION: T 14N R2W SECT I LT54 LESS N 150'
PERFORMED FOR: TROY DAVIS HOMES
DATE: 9-21-2016 PROJECT No •
PARCEL ID#: TECHNICIAN• W. ROBERTS
DEPTH
(feet)
1
2 -0404 t*
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
0
TEST HOLE 3
OB/OG
GM
GRAY SAND WITH SILT AND GRAVEL
BOH
SLOPE
WAS GROUND WATER ENCOUNTERED? YES
IF YES @ WHAT DEPTHS 12.0'
DEPTH OF WATER AFTER MONITORING: et.t
DATE OF MONITORING- tc(3/i .
.- tl
,4t .jr 'If
F Be min Schiller
rttPFss, • AsE L 112592• • ��a e.
tkAlkfPROFESSION���
lZkieeekr
Professional Engineers Stamp:
SITE PLAN
SEE SITE PLAN
DATE
READING
GROSS TIME
(MINUTES)
NET TIME
(MINUTES)
DEPTH TO
WATER
(INCHES)
NET DROP
(INCHES)
9/21
TEST HOLE PRESOAKED PRIOR TO TESTING:
1
12:33
0:00
0"
2
12:43
10:00
5.55"
3
12:44
0:00
0"
4
12:54
10:00
5.50"
5
12:55
0:00
0"
6
1:05
10:00
5.49"
PERCOLATION RATE:18 (MIN/INCH) PERC. HOLE DIA. 4 (INCHES)
TEST RUN BETWEEN: 4 FT. and 5 FT.
COMMENTS -
TEST PERFORMED BY ANDERSON ENGINEERING. I, BENJAMIN SCHILLER, CERTIFY THAT
THIS WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPLE GUIDELINES IN EFFECT ON THIS
DATE: SEPTEMBER 21, 2016
