HomeMy WebLinkAboutHENKINS BLK 1 LT 10HENKINS
Lot 10
MUNICIPALITY OF ANCHORAGE
On -Site Water & Wastewater Program
PO Box 196650 4700 Elmore Road
Anchorage, Alaska 99519-6650 Phone: (907) 343-7904 Fax: (907) 343-7997
hftp://www.muni.org/onsite
On -Site Water & Wastewater System Permit
Permit Number: OSP251128
Work Type: WellSeptic Initial
Tax Code Number: 05129232000
Site Legal Address: HENKINS BLK 1 LT 10 G:0755
Site Mailing Address:
Owner: MIDNIGHT SUN CONSTRUCTION LLC
Design Engineer: FORGE ENGINEERING
This permit is for the construction of:
Effective Date
Expiration Date:
Lot Size in Sq Ft
Total Bedrooms:
L>cpartai�<:•nr
5/8/2025
5/8/2026
40511
Q Disposal Field Q Septic Tank ❑ Holding Tank ❑ Privy W Private Well ❑ Water Storage
All construction shall 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 shall notify the Development
Services Department per AMC 15.65. Provide notification by calling (907) 343-7904 (24/7).
4. From October 15 to April 15, a subsurface soil absorption system under construction during freezing weather
shall be either:
a. Opened and Closed on the same day, or
b. Covered, sealed, and heated to prevent freezing
Received By: -5 ' �- - Date:
Issued By: Date: S '✓ r
ON -SITE SEPTIC/WELL PERMIT APPLICATION
Parcel I.D. 051-292-32
Property owners) Midnight Sun Construction LLC Day phone (907)727-1433
Mailing address2000 E Dowling RD STE 8
Site address 19980 Gilbert Rd
Legal description
Henkins Block 1 Lot 10
Number of Bedrooms4
Engineering Firm Forge Engineering
Building Permit Number R251714
Not Applicable ❑
APPLICATION IS FOR: APPLICATION IS AN:
(Z all that apply)
Absorption Field
Initial El
Septic Tank
Upgrade ❑
Holding Tank
❑ Renewal ❑
Privy
❑
Well
Fi
THIS APPLICATION INCLUDES A WAIVER REQUEST FOR:
Permit/Rush Fees:vv
Date of Payrnent:.
Permit No. II
Waiver Fees:
Date of Payment:
Waiver No.
Distance:
May 5, 2025
MOA Development Services, On-Site Water & Wastewater Program
4700 Elmore Rd
Anchorage, AK 99507
Subject: Henkins B1 L10 - 19980 Gilbert Rd
Septic system design
Dear On-Site Services Engineer:
The owner of the above lot intends to build a 4-bedroom home on the property. This permit
application is for the construction of a new well and septic system. The attached site plan identifies
the location of the home as well as the proposed well, septic location and alternate site. No conflicts
exist between this proposed system and any other well or septic system, whether on this lot or
adjacent lots.
The ground surface on the lot slopes toward the southwest at a relatively steady slope. There are
no slopes greater than 25% within 50 feet downslope of either the primary or alternate site.
Contours are shown on the site plan showing the grade and direction of flow. Stormwater drainage
will not impact this septic system. The new trench will be constructed parallel to the slope as much
as possible.
Wells on this and adjacent lots are shown. The new system will be a minimum of 100’ from all
wells and surface water, and more than 5’ away from the septic tank. The alternate site is located
more than 6’ away. Please refer to the attached test hole logs, plan and profile pages for the septic
design. If this design is followed, there will be no adverse impacts to adjacent properties.
Sincerely,
Benjamin Schiller, PE
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251128, Curtis Townsend, 05/08/25
5
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Benjamin Schiller
CE 12592REGISTEREDPROFESSION A L E N GINEER
1"=50'
CO - CLEANOUT
2CO - DOUBLE CLEANOUT
FCO - FOUNDATION CLEANOUT
FS - FLOW SPLITTER VALVE
MT - MONITORING TUBE
TH - TEST HOLE
LEGEND
HENKINS, BLOCK 1 LOT 10
FEET
0 50 100
SEPTIC PLAN
5/1/25
GI
L
B
E
R
T
R
O
A
D
(2) 60' LONG x 5' WIDE, 6" EFFECTIVE
DEPTH ABSORPTION TRENCHES
NEW 1250-GAL
SEPTIC TANK
CO
CO
CO CO
MT MT
MT
MT
2CO
FCO
EXISTING NEIGHBORING SEPTIC
TH#1
PROPOSED WELL
UNDEVELOPED
UNDEVELOPED
SEPTIC SYSTEM OUTSIDE WELL RADIUS
FS
ALTERNATE SITE
CAT III SYSTEM
25'LF, 5' WIDE, 6" ED
ENSURE >100' SEPARATION
FROM WELL ON LOT 8
(LOCATION ESTIMATED)
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251128, Curtis Townsend, 05/08/25
HENKINS, BLOCK 1 LOT 10
TYPICAL TRENCH SECTION
(NO SCALE)
NOTES:
1. GRADE AREA OVER TRENCH TO DRAIN AWAY
2. PROVIDE 3' OF COVER OVER TRENCHES AND 4' OVER SEPTIC TANK, OR 2'
WITH 2" OF INSULATION
3. CHECK GROUNDWATER AT TIME OF CONSTRUCTION. IF LEVEL IS HIGHER
THAN PREVIOUSLY OBSERVED, CALL ENGINEER IMMEDIATELY
Benjamin Schiller
CE 12592REGISTEREDPROFESSION A L E N GINEER
4" PERFORATED PVC (HOLES DOWN)
DRAINFIELD ROCK
6"
4'
6"
DESIGN FACTORS:SYSTEM REQUIREMENTS:
600 GPD PEAK FLOW
PERK RATE: 0.07 MIN/IN
APPLICATION RATE: 1.0 GPD/SF (FILTER SAND)
5-WIDE TRENCH SYSTEM
WITH 2' SAND FILTER
1250-GAL SEPTIC TANK
BOTTOM OF TRENCH: 5' BELOW GRADE
FLOW LINE ELEVATION: 4.5' BELOW GRADE
600 GPD / 1.0 GPD/SF / 5' WIDE * 1.0 RED FACTOR [0.5' DEEP] = 120 LF TRENCH REQUIRED
(120 LF SPECIFIED)
GEOTEXTILE FABRIC
6"
5/1/25
5'
2'
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251128, Curtis Townsend, 05/08/25
LEGAL DESCRIPTION:
PERFORMED FOR:
DATE: PARCEL ID#:
SOILS LOG AND PERCOLATION TEST
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
DEPTH
(feet)
TEST HOLE 1
DATE READING NET TIME
(minutes)
DEPTH to
WATER NET DROP
PERCOLATION RATE: (MIN/INCH)
(inches)(inches)
DATE OF MONITORING
DEPTH TO WATER AFTER MONITORING
0.07
11/14/24 1
2
3
4
5
6
GP
Professional Engineers Stamp:
HENKINS BLOCK 1 LOT 10
11/14/24 051-291-11
MIKE ANDERSON
1 0
16
1' OB
0:21
Benjamin Schiller
CE 12592REGISTEREDPROFESSION A L E N GINEER
PERC TEST LOCATION
TECHNICIAN: M Jakubisin
7 0
16
13'
11/21/24
COMMENTS:
SITE PLAN
6 0
16
USCS SOIL CLASSIFICATION WAS VISUALLY DETERMINED
5/1/25
MOISTURE NOTED AT TIME OF DIGGING?n/a
0:18
0:23
0:25
0:26
0:26
1 0
16
1 0
16
1 0
16
1 0
16
1 0
16
7 0
16 6 0
16
7 0
16 6 0
16
7 0
16 6 0
16
7 0
16 6 0
16
7 0
16 6 0
16
GM (SANDY)
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251128, Curtis Townsend, 05/08/25
