HomeMy WebLinkAboutHUFFMAN HIGHLANDS S12659Onsite File
Huffman
Highlands
#S12659
Huffman Highlands S/D Lots 1-4
/\Subdivision of
T12NR3WSEC 27PTN NE 1/4
Municipality of Anchorage
Prepared for:
HultquistHornes
1Z57OOld Seward Highway
Anchorage, AK995lS
Via
S4 Group
Land Development Consultants
Prepared By:
Pannone Engineering Services, LLC
P.O.Box 1807
PALMER, AKS9645
P.O.BOX 1OU2l7
ANCHORAGE, AK995l0
Submitted By:
Steven R.Pannone, P£
Principal, Civil Engineer
S12659 Huffman Highlands SjD, Lots 1-4
Subdivision Report
Engineering Report
May 6, 2022
Project Description
This soils report is to identify the suitability of the soils on the lots for an on-site septic system
The subject lots are the proposed subdivision of T12N R3W SEC 27 PTN NE % to create Huffman
Highlands Subdivision, Lots 1-4. This report will detail the soils encountered during the soils
investigation, existing topography, impact to surrounding wells and septic system and the
suitability of the soils encountered for the use of an on-site wastewater disposal system and
water supply system. The proposed development will include four residential lots. It is assumed
the residential lots will support a single family structure containing three to five bedrooms.
Each lot is expected to also have a private well providing water to the residence.
Topography
The proposed subdivision is located on the south side of Huffman Road. The lots in the
subdivision slope is generally from the northeast to the southwest. The subject area slopes at
approximately 12% to 25%. Two small areas have slopes steeper than 25%. These areas are
identified on the attached Site Plan, Appendix B. There is a small depression in the south -center
of the proposed subdivision.
Soils Investigation
Pannone Engineering Services performed a soils investigation on January 13, 2022 on each of
the lots of the proposed subdivision. The intent of the investigation was to verify the
percolation rate of the soils and to obtain seasonal high ground water levels. The test pits
revealed a variety of soils as shown on the attached Soils Logs for each of the proposed
subdivision lots, Appendix A. Water monitoring was conducted on all five test holes on
February 9, 2022.
Existing water and wastewater systems
The proposed subdivision is located at 5550 Huffman Road in Anchorage. There are existing
residential wastewater disposal and water supply systems surrounding the proposed
development. The proposed wastewater systems shall be located greater than 100 feet from
any existing private well, and all proposed wells shall be located greater than 100 feet from any
existing wastewater disposal system.
S12659 Huffman Highlands S/D, Lots 1-4
Subdivision Report
May 6, 2022
Surface water
There are no wetlands or surface water within 200' of this Development. There is a low spot in
the center of this development. During the recent rain events, this low spot remained dry.
There is no indication of surface water in this low spot. A seasonal drainage pattern does exist
on the property. The drainage pattern is illustrated on the attached Site Plan, Appendix B. This
pattern has remained dry during recent rain events.
Engineering Criteria
PES conducted five test pits and percolation tests on the proposed lots and found consistent
soils in each pit of well -graded sands and gravels having a percolation rate varying from one
minute per inch (1.0mpi) to twelve minutes per inch (12.Ompi).
Based upon the soil test results there are several options for systems that could be installed on
all of the lots. There are no steep areas within the respective reserve areas nor 50 feet down
slope of the reserve area.
The table below has the test hole depths, percolation rates and depth to ground water on each
perspective lot in the subdivision. Seasonal high groundwater readings were conducted on May
5, 2022.
BLOCK, LOT
TH #
TH DEPTH
PERC RATE
GROUND H2O
LEVEL
SEASONAL HIGH GW
05.05.2022
REQUIRED RES
AREA
Lot 1
TH-1
16.0
6-12
Dry
DRY
12,000
Lot 2
TH-2
16.0
1-5
Dry
8.3'
10,000
Lot 3
TH-3
16.0
1-5
Dry
10.7'
10,000
Lot 4
TH-4
1 16.0
1-5
Dry
DRY
10,000
Site Information
The Municipality of Anchorage (MOA) Regulations (15.65) govern for single-family homes.
These regulations require a minimum of four (4) feet vertical separation between the bottom of
a soil absorption system and ground water for a conventional wastewater disposal system, six
feet (6') to bedrock or other impermeable layers (tight silts and clays) and must be located
greater than 100 feet horizontally from any surface water (Creeks and ponds). Additionally, the
accepting soils must have a percolation rate of less than 120 minutes per inch. A lot must have
room for a primary and reserve soil absorption system. Advanced treatments systems have
been approved for use by the MOA and have approval for much smaller separation distances
than conventional systems. Advanced treatment systems are an option for development of any
of these lots as well.
S12659 Huffman Highlands S/D, Lots 1-4
Subdivision Report
May 6, 2022
Water Availability
Based upon surrounding lots in the subdivision there is availability for a private water system
on the proposed lots. A survey of the well data from the surrounding lots is provided on the
table below. Data shows ample water availability in the lots surrounding the above referenced
lot.
Legal Description
Well Depth
Well Production
Static Water Level
Nitrates
Heritage Hills, BS L1
240
4 gpm
227
12-1998 / 1.17 mg/I
Cross View Estates, B2 L6a
265
5 gpm
227
11-2009 / 2.33 mg/I
Cross View Estates, 132 LS
256
6 gpm
237
08-2013 / 4.33 mg/I
Contour Acres #1, Li
300
3-4 gpm
170
10-2016 / 6.66 mg/1
Contour Acres #1, L3
206
13 gpm
141
11-2016 / 5.91 mg/I
Contour Acres #2, LS
465
2 gpm119
07-1993 J 2.71 mg/I
Contour Acres #2, L4
203
3 gpm
136
07-2011 / 2.88 mg/1
Contour Acres #3, B2 L3
249
4 gpm
230
11-1998 / ND
Contour Acres, 62 L2
265
4 gpm
214
06-2000 / 0.80 mg/I
Contour Acres, 62 Ll
250
4-5 gpm
241
04-2019 / 5.61 mg/I
Conclusion
Based upon the soils investigations conducted to date, and review of the existing data from the
surrounding lots, the proposed subdivision has adequate soils for each lot to install and operate
an on-site wastewater disposal system. In addition, the area has sufficient water to provide for
individual private wells for each lot.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TEST HOLE 1
TOPSOIL
SAND &
GRAVEL
DATE PERFORMED: 01.13.2022
READING
DATE NET TIME
WATER
LEVEL
READING
NET DROP
RATE
(MPI)
1
01.13.22
6.49"
2
30 MIN
9.11"
2.62
11.45
3
6.49"
4
30 MIN
9.10"
2.61"
11.49
5
6.49"
6
30 MIN 1
9.09"
1 2.6"
11,53
WAS GROUND WATER
ENCOUNTERED? N
IF YES, AT WHAT
DEPTH? —NA—'
DEPTH TO WATER AFTER
MONITORING? — DRY —
DATE: 02.09.2022
SEASONAL HIGH GROUND WATER
DEPTH TO WATER: — DRY—
DATE: 05.05.2022
COMMENTS:
SOIL TEST RESULTS/ANALYSIS
• PERCOLATION RATE 6-12 (min/inch)
(Hydrologic Soils Group: HSG A)
• PERC HOLE DIAMETER 6"
• TEST RUN BETWEEN 3 FT AND 4 FT.
• TEST RUN FOR OVER AN HOUR.
PERFORMED BY: Dan Moran. I CERTIFY THAT THIS TEST
WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL
GUIDLINES IN EFFECT ON THE DATE OF THIS TEST.
NOTES: PANNONE ENG SVC LLC (C.I. 1088) ."" REVISIONS DATE
Only P.O. BOX 1807 PALER, AK 99645 _'p(E..O� A�qS , REV 05 O6 2022 04 04 2022
Subdivision Use Onl / /
PHONE 907) 745-8200 FAX (907) 745--820i _=h .. !ry , SCALE
HUFFMAN HIGHLANDS SUBDIVISION=...:.4. P.I.D. NO
DRAWN MMM HULTOUIST HOMES 'y ', ste R. Pannone PERMIT N0.
12570 OLD SEWARD HWY ce-a,as- S12659
TEST HOLE #1=
ANCAHORGE, AK 99515��'��=��
i� SHEET
1 OF 5
TEST HOLE 2
1 Um
TOPSOIL
2-
3456 3-
4-
5-
6
7
GW SAND &
8 GRAVEL
9
10
11
12
13
14
15
16 BOH
17
18
DATE PERFORMED: 01.13.2022
READING
DATE NET TIME
WATER
LEVEL
READING
NET DROP
RATE
(MPI)
1
01.13.22
9.33"
2
3 MIN
11.17"
1.84"
1.63
3
7.82"
4
4 MIN
11.17"
3.35"
1.19
5
3.10"
6
15 MIN
9.10"
6.00"
2.50
7
3.10"
8
8 MIN
9.10"
6.00"
1.33
9
3.10"
10
9 MIN
9.10"
6.00"
1.50
11
3.10"
12
9 MIN
9.10"
6.00"
1.50
11
3.10"
12
9 MIN
9.10"
6.00"
1.50
WAS GROUND WATER
ENCOUNTERED? N
IF YES. AT WHAT
DEPTH? N/A'
DEPTH TO WATER AFTER
MONITORING? 15'
DATE: 02.09.2022
SEASONAL HIGH GROUND WATER
DEPTH TO WATER: —8.3'
DATE: 05.05.22
COMMENTS:
SOIL TEST RESULTS/ANALYSIS
® PERCOLATION RATE 1-5 (min/inch)
(Hydrologic Soils Group: HSG A)
® PERC HOLE DIAMETER 6"
® TEST RUN BETWEEN 3 FT AND 4 FT.
® TEST RUN FOR OVER AN HOUR.
PERFORMED BY: Dan Moran. I CERTIFY THAT THIS TEST
WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL
GUIDLINES IN EFFECT ON THE DATE OF THIS TEST.
NOTES: PAINNOPNE ENG SVC LLC C.1. 1088) DATE
.� �������„� REVISIONS
P.O. BOX 1807 PAL+IER, AK 9645 OF q 04/04/2022
Subdivision Use Only �E ...�q ', REV 05/06/2022
PHONE 907) 745-8200 FAX (907) 745-8201 = ��? s�rS hSCALE
HUFFMAN HIGHLANDS SUBDIVISION P.I.D. NO _
DRAWN MMM HULTQUIST HOMES 5t- R. Ponnone ,
'._ CE -8149 -"" PERMIT NO.
12570 OLD SEWARD HWY S12659
TEST HOLE #2 AN CAHORGE, AK 99515 SHEET
2 OF 5
TEST HOLE 3
VK
TOPSOIL
2
3-
4-
5-
6 456
7
GW SAND &
8 ,GRAVEL
9
10
11
12
13
14
15
16 BOH
17
18
DATE PERFORMED: 01.13.2022
READING
DATE NET TIME
WATER
LEVEL
READING
NET DROP
RATE
(MPI)
1
01.13.22
5.17"
2
6 MIN
11.17"
6.00"
1.00
3
5.17"
4
8 MIN
11.17"
6.00"
1.33
5
5.17"
6
10 MIN
11.01"
5.84"
1.71
7
5.17"
8
10 MIN
10.50"
5.33"
1.88
9
5.17"
PO
10 MIN
10.45"
5.28"
T.89
11
5.17"
12
10 MIN
10.41"
5.24"
1.91
13
5.17"
14
10 MIN
10.40"
5.23"
1.91
WAS GROUND WATER
ENCOUNTERED? N
IF YES. AT WHAT
DEPTH? –NA–'
DEPTH TO WATER AFTER
MONITORING? – DRY –
DATE: 02.09.2022
SEASONAL HIGH GROUND WATER
DEPTH TO WATER: –10.7'
DATE: 05.05.22
COMMENTS:
SOIL TEST RESULTS/ANALYSIS
• PERCOLATION RATE 1-5 (min/inch)
–(Hydrologic Soils Group: HSG A)
• PERC HOLE DIAMETER 6"
• TEST RUN BETWEEN_3 FT AND 4 FT.
• TEST RUN FOR OVER AN HOUR.
PERFORMED BY: Dan Moran. I CERTIFY THAT THIS TEST
WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL
GUIDLINES IN EFFECT ON THE DATE OF THIS TEST.
NOTES: PANNONE ENG SVC LLC (C.I. 1088) " ` "`«1 REVISIONS DATE
Subdivision Use Only PHONE 9087)X745-8200ALFAX (907)UE, AK 97445-8201 = `i�P(E. OF .4411' 4/04/2022 REV 05/06/202-2 SOA E04/2022
HUFFMAN HIGItLANDS SUBDIVISION P.I.D. NO
HULTQUIST HOMES
DRAWN MMM Sty R. P....- .
fid`., ce-8149 �= —"' PERMIT NO.
12570 OLD SEWARD HWY _
TEST HOLE #3 y- S12659
ANCAHORGE, AK 99515 `5=,.= SHEE3 OF 5
TEST HOLE 4
1 vR
TOPSOIL
2
3-
4-
5-
6-
7 4567
GW SAND &
8 GRAVEL
9
10
11
12
13
14
15
16 BOH
17
18
DATE PERFORMED: 01.13.2022
READING
DATE NET TIME
WATER
LEVEL
READING
NET DROP
RATE
(MPI)
1
01.13.22
3.06"
02.09.2022
SEASONAL
2
9 MIN
8.35"
5.29"
1.70
3
3.00"
4
10 MIN
8.35"
5.35"
1.87
5
3.00"
6
10 MIN
8.25"
5.25"
1.90
7
3.00"
8
10 MIN
8.17"
5.17"
1.93
9
3.00"
10
10 MIN
8.10"
5.10"
1.96
11
3.00"
12
10 MIN
7.99"
4.99"
2.00
13
3.00"
14
10 MIN
7.94"
4.94"
2.02
15
3.00"
16
10 MIN
7.92"
4.92'
2.03
WAS GROUND WATER
ENCOUNTERED? N
IF YES. AT
WHAT
DEPTH?
—NA—'
DEPTH TO
WATER AFTER
MONITORING? — DRY —
DATE:
02.09.2022
SEASONAL
HIGH GROUND WATER
DEPTH TO
WATER: DRY
DATE:
05.05.2022
COMMENTS:
SOIL TEST RESULTS/ANALYSIS
• PERCOLATION RATE 1-5 (min/inch)
(Hydrologic Soils Group: HSG A)
• PERC HOLE DIAMETER 6"
• TEST RUN BETWEEN 3 FT AND 4 FT.
• TEST RUN FOR OVER AN HOUR.
PERFORMED BY: Dan Moran. I CERTIFY THAT THIS TEST
WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL
GUIDLINES IN EFFECT ON THE DATE OF THIS TEST.
NOTES: DATE
Pe4NNONE ENG SVC LLC �C.1. '1088) .� �����", REVISIONS
P.O. BOX 1807 PALMER,AK 9645 OFA "' 04/04/2022
Subdivision Use Only = �� .._.,,4qs hl REV 05/06/2022
PHOT 907} 745-8200 FAX 907) 745-8201 = ��? �rq SCALE
4':
HUFFMAN HIGHLANDS SUBDIVISION P.I.D. NO
DRAWN MMM HULTQUIST HOMES % s — R. P—... _
��o . CE -8149 = PERMIT NO.
12570 OLD SEWARD HWY
TEST HOLE #4 ANCAHORGE, AK 99515
SHEET
S12659
,, 4 OF 5
11
TR 1
1
2-
3456 3-
4-
5-
6
7
GW
8
9
10
11
12
13
14
15
16 BOH
17
18
TOPSOIL
SAND &
GRAVEL
DATE PERFORMED: 01.13.2022
READING
DATE NET TIME
WATER
LEVEL
READING
NET DROP
RATE
(MPI)
1
01.13.22
6.20"
02.09.2022
DEPTH TO
2
30 MIN
9.88"
3.68"
8.15
3
DEPTH TO
6.20"
DATE:
05.05.2022
4
30 MIN
9.85"
3.65"
8.22
5
6.20"
6
30 MIN
9.85"
3.65"
8.22
WAS GROUND WATER
ENCOUNTERED? N
IF YES, AT
WHAT
DEPTH?
—NA—'
DEPTH TO
WATER AFTER
MONITORING? — DRY —
DATE:
02.09.2022
DEPTH TO
WATER AFTER
MONITORING? — DRY —
DATE:
02.09.2022
SEASONAL
HIGH GROUND WATER
DEPTH TO
WATER: DRY
DATE:
05.05.2022
COMMENTS:
SOIL TEST RESULTS/ANALYSIS
• PERCOLATION RATE 6-12(min/inch)
(Hydrologic Soils Group: HSG A)
• PERC HOLE DIAMETER 6"
• TEST RUN BETWEEN _3 FT AND 4 FT.
• TEST RUN FOR OVER AN HOUR.
PERFORMED BY: Dan Moran. I CERTIFY THAT THIS TEST
WAS PERFORMED IN ACCORDANCE WITH ALL STATE AND MUNICIPAL
GUIDLINES IN EFFECT ON THE DATE OF THIS TEST.
NOTES: PANNONE ENG SNC LLC C.'. 10$$) " ` "" ,, REVISIONS DATE
Subdivision Use Only P.O. 80X 1807 PALM, AK 9964504/04/2022 �F A�gs', 06 2022 04/04/2022
PHONE 907) 745-8200 FAX 907 745-8201 REV 05 _-��, !ry , / / SCALE
HUFFMAN HIGHLANDS SUBDIVISION = P.LD. NO
DRAWN MMM HULTQUIST HOMES St—R P..-..,
12570 OLD SEWARD HWY" �E-B149 _ PERMIT No.
'�' � S12659
TRACT ##1 ANCAHORGE AK 99515ss� SHEET of 5