HomeMy WebLinkAboutT12N R3W SEC 33 LT 32A12N R3W SEC 33
Lot 32A
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
http://www.muni.org/onsite
On -Site Wastewater Disposal System Permit
Permit Number: OSP251141
Work Type: Septic Upgrade
Tax Code Number: 01818118000
Site Legal Address: T12N R3W SEC 33 LT 32A G:3035
Site Mailing Address: 14100 ELMORE RD, Anchorage
Owner: TILLMAN GEORGE & ANNA
Design Engineer:
This permit is for the construction of:
Effective Date
Expiration Date:
Lot Size in Sq Ft:
Total Bedrooms:
8/11 /2025
8/11 /2026
49003
Q Disposal Field Q Septic Tank ❑ Holding Tank ❑ Privy ❑ 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: �✓ Date:
Issued By: Date: / '�
4
ON -SITE SEPTIC/WELL PERMIT APPLICATION
Parcel I.D. 018-181-18
Property owner(s) George & Anna Tillman Day phone 9072501502
Mailing address 14100 Elmore Road, Anchorage, AK 99516-3545
Site address 14100 Elmore Road, Anchorage, AK
Legal description T 12 N R3W Sec 33 Lot 32A
Number of Bedrooms 4
Engineering Firm Alaska Rim Engineering
Building Permit Number
Not Applicable n
APPLICATION IS FOR: APPLICATION IS AN:
(2 all that apply)
Absorption Field
RX Initial D
Septic Tank
ED Upgrade FX I
Holding Tank
D Renewal D
Privy
R
Well
F-1
Water Storage
R
THIS APPLICATION INCLUDES A WAIVER REQUEST FOR:
r--n 5_00
Permit/Rush Fees:
Date of Payment: 3j- 13 W S-
Permit No. �2�sj ) L] I
Waiver Fees:
Date of Payment:
Waiver No.
Distance:
ARE, LLC
dba ALASKA RIM ENGINEERING
CONSULTING CIVIL ENGINEERS & PLANNERS
1920 Kentucky Derby Dr.
Palmer Alaska 99645
Telephone: 907.775.2347
Email: alaskarimengineering.llc@gmail.com
Professional Consulting --- Practical Solutions
ARE LLC, project # 2025009
June 19, 2025
Municipality of Anchorage, D.S.D.,
On-Site Water and Wastewater Department
4700 Elmore Road, Anchorage, AK, 99519
Re: 2025009 T12N R3W Sec 33 Lot 32A
14100 Elmore Rd
Parcel ID 018-181-18
Subject: Septic System Replacement/Upgrade
Design Narrative and Permit Application
Dear Plan Reviewer,
The owners of the above 4-bedroom home log-crib is in a need of replacement and a permit is required
to replace the outdated septic system.
SOILS INVESTIGATION
Test Hole
One test hole was excavated on March 5, 2025, and logged by Charles A. Leet, PE. The test hole was
advanced to a depth of 12-feet. Groundwater was observed at 10-feet, and no impermeable layer were
encountered. Groundwater was observed to be at 7.5 on May 5, 2025. See the attached soil log.
Percolation Test
A percolation was conducted and determined to drain faster than a minute per inch, therefore a soil
sample of the receiving soils were taken to the laboratory for testing, see attached gradation test results
from Hansen, PE, dated March 27, 2025.
Based on the percolation test and laboratory results a sand liner will be required.
TOPOGRAPHY
The lot slopes generally from the northeast to the southwest at approximately 5%-6%. See the attached
site plan for the topography.
SEPTIC TANK REQUIREMENTS
There is no existing septic tank. The existing log crib will be pumped limed and backfilled with Type
II gravel and topped with 4-inches of topsoil.
DRAIN FIELD DESIGN
We are proposing a 15-foot wide by 58-foot absorption bed. See Sheet 1 of the design package
REPLACEMENT SYSTEM
See Sheet 2 of the design package.
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
T12N, R3W, Sec 33, Lot 32A Page 2 of 2
14100 Elmore Road June 19, 2025
Professional Consulting --- Practical Solutions
ARE LLC, project # 2024061
SURFACE WATERS
There is no surface water within 100 feet of the proposed system. Drainage arrows on the site plan
indicate the slope and direction of stormwater runoff. (See attached site plan)
WELLS & DRINKING WATER
This lot and the surrounding developed lots are served by private wells the required separation distance
will be maintained.
SURROUNDING PROPERTIES
We do not anticipate any adverse effects on the neighboring septic systems, reserve areas or drainage
patterns by the installation of the proposed septic system.
BUOYANCE DETERMINATION
See attached buoyance calculations. We do not anticipate the need for additional anchoring of the tank.
The tank will need to be filled during installation until four feet of backfill material has been placed
over the tank, to avoid floating during construction.
Sincerely,
June 19, 2025
Charles A. Leet, P.E.
Principal Engineer
Attachments:
Permit application
Neighboring Wells and Septic’s
Proposed Septic Plan
Absorption Field Cross Section
Absorption Bed Details
Soil(s) log w/ percolation test data
Orenco Pump calculation and Pump Curve
Buoyancy Calculations
Asbuilt
ON-SITE WASTEWATER
DISPOSAL SYSTEM WITH RAISE MOUND
14100 ELMORE PAGE 1 OF1
JUNE 19, 2025
Alaska Rim Engineering
Professional Consulting…Practical Solutions
BUOYANCY
The following are calculations for buoyancy and tank restraints:
Assume the 1,500-gallon tank is buried with 3-feet soil cover + 2-inches ridged
insulation; tank footprint = 12-feet by 4.8-feet = 58 sf; tank weight = 1,200 lbs.
Groundwater has been determined by groundwater monitoring to be at 7.5-feet.
Accounting for foundation depth and 2% fall in the sewer pipe coming from the house
the tank will be mostly submerge during construction. Therefore, assuming the tank fully
immersed in water; assume tank covered with 3-foot of dry soil.
Sum of the force in the Y-direction +(positive) in the up direction:
LOADS ACTING DOWNWARD
Dead load = weight tank + weight soil cover (unsaturated conditions)
= 1,200 lbs. + 115 lbs./cft x 3-feet x 58 sf = -21,210 lbs.
UPLIFT FORCE ON TANK
Uplift force on tank = (1,500 gal / 7.48 gal/cft) x 62.4 lbs./cft = +12,513 lbs.
SUMMATION OF FORCES
Summation of forces =-21,210 lbs. + 12,513 lbs. = -8,696 lbs.
RECOMMENDATION:
No additional anchors are required for final installation
The contractor will need to fill the tank for installation.
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
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Municipality of Anchorage
On-site Water and Wastewater
REVIEWED FOR CODE COMPLIANCE
OSP251141, Curtis Townsend, 08/11/25
Pump Selection for a Pressurized System - Single Family Residence Project
T12N, R3W, SEC 33, GOV LOT 32 / 14100 ELMORE ROAD
Parameters
Discharge Assembly Size
Transport Length
Transport Pipe Class
Transport Line Size
Distributing Valve Model
Max Elevation Lift
Manifold Length
Manifold Pipe Class
Manifold Pipe Size
Number of Laterals per Cell
Lateral Length
Lateral Pipe Class
Lateral Pipe Size
Orifice Size
Orifice Spacing
Residual Head
Flow Meter
'Add-on' Friction Losses
1.25
20
40
1.25
None
5
10
40
1.25
4
58
40
1.25
1/8
3
6
None
0
inches
feet
inches
feet
feet
inches
feet
inches
inches
feet
feet
inches
feet
Calculations
Minimum Flow Rate per Orifice
Number of Orifices per Zone
Total Flow Rate per Zone
Number of Laterals per Zone
% Flow Differential 1st/Last Orifice
Transport Velocity
0.47
80
38.1
4
2.1
8.2
gpm
gpm
%
fps
Frictional Head Losses
Loss through Discharge
Loss in Transport
Loss through Valve
Loss in Manifold
Loss in Laterals
Loss through Flowmeter
'Add-on' Friction Losses
10.2
3.5
0.0
0.5
0.3
0.0
0.0
feet
feet
feet
feet
feet
feet
feet
Pipe Volumes
Vol of Transport Line
Vol of Manifold
Vol of Laterals per Zone
Total Volume
1.6
0.8
18.0
20.4
gals
gals
gals
gals
Minimum Pump Requirements
Design Flow Rate
Total Dynamic Head
38.1
25.4
gpm
feet
0 5 10 15 20 25 30 35 40
0
50
100
150
200
250
300
Net Discharge (gpm)
PumpData
PF3005 High Head Effluent Pump
30 GPM, 1/2HP
115/230V 1Ø 60Hz, 200V 3Ø 60Hz
Legend
System Curve:
Pump Curve:
Pump Optimal Range:
Operating Point:
Design Point:
Ia-
CD-
Noo°o7'W 165.00
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