HomeMy WebLinkAboutDUKE & DUCHESS w/ vacation Expired 12-05-97 S-9911A
MUNICIPALITY OF ANCHORAGE
Department of Health and Human Services
P.O. Box 196650
Anchorage, Alaska 99519-6650
Date:
June 12, 1998
To:
Q Zoning & Platting, CPD
Subject: /. Request for Comments on Subdivisions ~ Jnne 12, 1998
The Environmental Serwces Division, On-Site Services Program, has reviewed the following
cases and has these comments:
S-9042A:
Heritage Estates Time Extension (C.A.)
No objections.
S-9833A:
Parkside ]Estates Time Extension (C.A.)
No objections.
S-9911A:
Dnlce and Duchess Time Extension (C.A.)
No objections.
S-10282: Olday, Lot lA
No objections.
S-10283:
Alder~vood, Lots 5A, 6A, 7B, 8A Block 2
No objections.
S-10284: Nixa
The existing on-site water and wastewater disposal systems serving this
property mnst be docnmented and shown to comply with all applicable
portions of AMC Chapters 15.55 and 15.65.
S-.10285:
S-10287:
Screaming Eagle, Lots 1 - 23 and Tract A
No objections provided all lots are served by public sewer and water.
Meadows, Lot 1 and 2
No objections provided all lots are served by public sewer and water.
SAMUEl_ R. P£TERSCN, JR.
ATTORt~,E¥ AT LAW
P.O. Box 672149
Chugiak, AK 99567
(907) 688-5002
(907) 688-5012 Fax
Mr. Jerry Weaver
MOA Dept. of Community
Planning and Development
632 W. 6th Avenue, #210
Anchorage, AK 99501
IN RE:
Duke and Duchess Subdivision - Time L:xtension
May 4, 1998~-,
Dear Mr. Weaver:
I am writing to request an eighteen month t~me extension on the plat approval
which is to expire today. Bette MacClelland is my mother and I am handling this
matter.
I will need more time to comp:eta Lhe requirements of platting board conditions
of approval. Enclosed is payment in the u,-,mur, t c. $350.00 for the extension fee on
Bette MacClelland's behalf.
Please contact me if you have any questions and thank you in advance for your
attention to this matter.
SRPJ/ww
Enclosure
Samue~ R. Pe(~rs~n,~r.
A:~t. orgey at L~ ~
DATE:
TO:
FROM:
SUBJECT:
MUNICIPALITY OF ANCHORAGE
MEMORANDUM
December 4, 1996
Jerry Weaver, Supervisor, Plattiug Section, CPD
James Cross, P.E., Program Manager, On-Site Water Quality.
S-99i 1, Duke and Dnchess Snbdivision.
I have finished my review of tile iuformation provided on this snbdivision, and wonld like to make some
geueral comments prior to my reconnneadations.
Dne to the concerns of the residents in the immediate ama of this subdivision, I have spent considerable
time reviewing the Hydrogeological and Geophysical Investigation report prepared for this subdivisiou, as
well as additional information provided by area residents and ilfformation obtained from files in this
office.
This information sbows that:
1. Approval of this subdivision will allow the installation of fonr (,l) additional wells.
2. The static water levels in the wells surrounding this snbdivision varied by more than 100 feet in
elevation. This strongly indicates that the wells are not bydranlically connected, or that
production fi'om one well will not affect the yield of adjacent wells.
3. The well yield test conducted iii the Hydrological and Geophysical lnvestigatiou showed no effect
oil the observation well. This again strongly indicates that the production from one well within
this area will not affect the yield of adjoining wells.
4. The large recharge areas above this sabdivision consistently recharge the bedrock aquifers in this
area.
5. The above ilfformation predicts ilo significant impact from the development of 4 additioual wells
within this subdivision on the prodnction of the existing wells in the immediate area.
My recommendations for this subdivision are:
No objections, provided the following conditions are added to the plat:
1. Sonic bedrock aqnifers iu lhe area of this sobdivisiou have shown marginal yields of less than
1 gallon per minnie. Production of any new wells developed within this subdivision may expect
similar yields.
2. Thc maximnm allowable development of any lot within this snbdivision shall be for a three
bedroom dwelling, unless a well is first developed and its productiou is showu to sopport
additional bedrooms.
Municipality AN£ HORAGE, A LASi{A ~;)~.~9.650'q
TELEPHONE (907) 343~222
O~ RickMystrom SEP 25 1996
Mayor Murlicipality of Anchorage
Anchorage DoDt. Health & Human Services
I)EPARTMI:{NT OF COMMUNI'U/PLANN[NG AND DEVEI_OPMENT
REQUEST FOR COMMENTS ON SUBDIVISIONS
DATE: September 24, 1996
The Municipality of Anchorage has received an application relating to
platting activity for the following case:
Long Plat to be heard November 6, 1996. Please
Case No.
S-9911
add to previous
Subdivision Name
Duke & Duchess Approval Verification)
list.
Attached is a copy of the proposed plat. Please submit your comments
in writing, specifying any easements or other requirements that your
department or agency may need.
If no easements are required at this time, please provide a list of
those plats to which there is "no comment" or "no objection."
Please return blueline print only if
required.
Comments must reach our office by October
included in staff recommendations.
Jerry T. Weaver, Jr.
Platting Officer
Enclosures
additional easements are
18, 1996 in order to be
TRY(-K
N ffMAN
HAYES, INC.
ENGIN EER~SURVEYORSA-AN DSCAPE ARCHITECTS
TRANSPORTATION and COMMUNITY PLANNING
September 18, 1996
Jerry Weaver, Platting Officer
Economic and Cormnunity Plmming Department
Municipality of Anchorage
P.O. Box 196650
Anchorage, A~K 99519-6650
[)ear ]'erry:
REF: Duke & Duchess Subdivision (S 9911) - Potable Water Evaluation
Per the Platth~g Board requirements 6 and 12, summary of action dated June 5, 1.996,
please find attached the preliminary report on the water availability for the proposed
subdivision. This report verifies an adequate potable water supply for the development
of these lots.
Please schedule our appearance at the first available platting board hearing so we may
present our findings and proceed with finalizing the plat. A copy of the final report will
be submitted to the Chugiak Community Council.
If you have arty questions please contact me at 279-0543.
Thank you for your consideration of this request.
Sincerely,
Ke~mth M. Duffus, P.E.
Senior Engineer
Attachments:
Terrasat, h~c. Evaluation
cc:
Bette K. MacClelland
file
Over 40 Years Serving Alaska
911 West Eighth Avenue o Anchorage, Alaska 99501-3497 · (907) 279-0543,'FAX (907) 276-7579
o9/12/18 13:~1 ~90, ~44 1490 TERRASAT ~002
IT. ERF SAT, INC. -
9200 I~e ~ Pa~wa7 2~ R~r ~o~, N~ e9~07
Con~i~g ' ~onm~ R~o~on
_
SI.pt. 12, 1996
907344.8370 Fax=. ~O7344,14~0 ' I
· Regulatory Compliance
Duke & Duchess Prel;minary Ptm~ing Test Aualysis.
A. l:n'eHminm7 analysis of the puml~g test cond,~c~d on the wall_ in the D,,ke. &~ Duchess
subdiv~on is complete. Thc well was dewatci'cd at 2 gpm over a period of 4.20 minute.
this we d~x-mined that the wate~ ir~oduc~ dm'lng pumph~g is mostly at~utable to weI[ storage;
water stored w~hin the walt boring and in imm~bt~ly adjacent fractures. Recovering water
levels indicam fi,st them is enough n~ctm~e to] pZOVid¢ tota[ Ecov~-y to the smQc water level in
l~s than 12. houm Dam ~ndicams th~ pumCng'the production well h~a no effect on
levels in the. mot~itor well located at, proximately 500 fe~ to the NontL
C-eophysicaI well logging w~ conducted for both th~ pr~xiuction and monitor wells. A ct~7
exam~n,6au of the d~m ind[caE~ that the~e ~a'e'~F2a:~nt fractm zones ne~t the bottom of both
wells that c~ntfibut~ tho n~ority of the wat~ ~te,'ing the wells. FraCtUm.zon~ also eccu~ at
tdgh~ elc~dions in ~mch wall These oth~ zbnes contdbut~ smaller mounts of w'aE,.r to
well
Our pmlirr,inat~ conch,~0ns drown fzom the pumping test aud geopttys~cal well logging
follows:
The well should produce a sustaiaea y~la of 0.4 gpm if pumped continually for one y~tr.
· The well should produce yidds on tlm ontcr 0f2 gpm if givea adequate titae to recharge.
A pum~§ rote of 2, gpm should produce at~ro~i,nate, ly 840 gallo"'" of water in 7 hours.
~ .cqnams to ahout 12.00 GPD, adg[ua~ for eight
The wall should fully ~ch~t~ge h appm~ro~tely 8 ho~m.
· Pnml~.' ~g of th~ pwdu~on well appea~s to Imve no imp;~t on surrounding wells.
· We believe that a deeper well would[ be calmbl= of pumiudug mo~
~f you have any (tv~tions regarding this p~;;m~n~ry ~ please c~ll.
Siuc~x~ly,..~. ·
Bill La4h~mce
Staff'Hydtogcolo~:
' \/
/
Il
I
Platting Board Summary of Action
June 5. 1996
Page 5
2. Providing 25 ~oot wide stream protection and maintenan_ce~c~easement on Lot
100A per ~210.
,,
Where are designated~r' wetlan"cha.~n"~ the- nor[hem" portion of these
lots axed re,,qu~re~a~ General Perm~t~.~.rior to any new fill or
Resolving ~ dech'cated walk~_a_y, irt tti'e~son Street
5. en exact location to be resolved with Physical Planning. ~'"~
altgnm.~/nj~Ve d xvith Physicai Plan
6. Res6fving access to Lot 101 with the property owner and DCPD.
AppI'OVl~l of the vacation of the sect]on line easement subject to filing a suitable
replat w~thtn 18 months.
Approval of the vacation of the road easement where it replaced with right-of-
way and snow storage easements.
Approval of the plat subject to:
1. Resolving utility easements with MTA, MEA and Enstar.
2. Entering into a subdivision agreement to construct:
a) telephone and electrical.
b) street name signs and traffic control devices.
3. Resolving the need for drainage improvements and drainage easemen~
with Project Management and Engineering.
4. Obtaining drainage from approval ADEC. t~)
5. Resolving soils and septic system~informa~l~ with DHHS.
- &'CC-' /. c-- ,.
MAY 23 '96 11:30 RE/MAX OF EAGLE RIVR P.2
CHUGIAK COMMUNII¥ COUNCIL
SERVING [:IRE LAKE, CHUGIAK, PETEPL~ CREEK:, MIRROR I,AKE,
THUNI)ERBIRD HEIGHTS AND EKLILITNA
18530 OLD GLENN HIGHWAY
CHUGIAK BENEFITS BUILDING alta CHUGIAK CHILDREN"S SERVICES
P.O, I[IOX 671350 CHUGIAK~ ALASKA 99562'
May 21, 1996
Commuaity Pla~miag a~d Development- J~y Weav~ ,: . ,
'~e Chu~ Co~ Co~ ~ed ~e p~elt~y p~ at o~ ~y 16, 1996 ~g for
~S.9911. We wo~d l~e fl~ ~I[o~g ~m~es ad~:
1 ..... We
. ~(~e m mb~l ~m:~ about ~e ~d~ of~e toad ea~t to ~e~ ptop~s,~
world a~'flmt Soott S~H ~om ~ Ea~ ~g S~eet M~t~oo pro~ ~ o~·
toggt~g tho ~,d~ ~d ~ten~ offl~ m'et~ of toad. We a~mo ~ ~e
]~bHo Works D~t h~ b~ ~ to oomm~t ~tey ge not ~e p~opl~ who a~y.do
1ho ~t~t~oe ~ ~ls ~ea. We ~ ~ ~ ~al ~at ~ be :~ed ~d o~d~ed
fxom ~ people who ~ow ~e mo~ aborn ~ ~a ~d do ~e a~l ~ol~t~auoe. ~y ~aoafl~ '
ofe~ts m~ ~ohde ~t gea to ~ow fox mow ~e~'~d ~ea to ~g ba~ ~ow
~om ~e roadway. (We ~ve ~ed o~ ~ad B0gd ~, Ted I~y to fo~w u~ ~ ~ ~put
2. We wo~d ~e ~mfi~ abo~ the rea~ for vaea~8 so ~. gea ~d ~e ~a~ on
the ~n~&ng proper~. ~ &o ~no~s ~ R~ 3 ~n~d~on for ~. ofwat~
$~ ~ ~e ~o ~s to phy ~ ~o~t p~ ~y approv~ Of~ pht. It $~e~ ~at '
s~t routes ~c profo~ed for o~on~i ~fl go ~ro co~ ~ffe~O, Apptop~te u~t~
easy--ts ~ bo o~b~ fix ~e ~. ROW ~ u~ ear.ts ~io~ go toge~r
to roflo~ fire ~o ~d ~o topo~phy. It ~s brou~t ~} how ~p t~a8 ~o~d I$ ~d a~ed
why ~at ~b~on is not ~olodcd ~ ~e app~afiom
3. A mjor ~neem ~ watg ~d ~fi.o. ~ adjac~t mb~o:~ below l~e
has a long ~ozy ofl~o wen goMg dw. ~e~e is ~d~oe on fi~ at DEC ~t the ~ate ieve~ M '
the w~H ~ ~ea~g ~oza 1.1 M 90, 2.90 ~ 92,~.80 ~ 94 ~d 1/1//9~ ~ey were
MAY 23 ~9~ ~1:30 RE/MAX OF EAGLE RIVR
paBo2
We have so Far not be, ca able to locate any test resorts that are mego ctwrgmt. It a~s flint ~p~c
contam~at~n ~ fo~g ~e b~ock down ~d cont~a~g ~ co~mlty we~ for S~
8~pe~ Sub, ~e ~n~ ~ s~ool was hoo~ ~ to pubic wat~ as a re~t ofM~atos ~d ~o
~ S~or c~ter ~ bo hooked ~ ~ou.
There are elevated liitrato level all along tho area from Cho~ak Eloinontary to awtmea $1opea
and further. It is imperative that no further d~vclopmont occur uatfl a solution for tho exiaing
problems is found. Additional Iota will cor~alnly put additional slrain on the existing problematic
well and tho surrounding ground water.
Tho engineers o£record for this plat gould have already researched MOA and DEC files. The
cxisth[§ ~0tics in Duke and Du~he~ should all be dye teated in tm attempt to locate possible
contamination. This information is ~r'cdoalin dec&ting the outcome of this plat application.
5. Wiry are the locations of the existing wells trod sq}tioa not ~ncluded in tho application? ff
you have fkr0aer domtmeaxtation regarding this plat we would be gra~othl for the oppernlttity to
review ig. Well and septic ~tcs with soils infomtion and locations of alternate a~pfio ~ea are
tiao not included for tho now lots being created. Age and condition of exiaing septics is $~ritioal
hff'omzatiott ia rcvt~wiog this plgt and $ettin§ answers to the ol~vafin§ nitrates.
4. A review of the areawido zoning should indicate documentation for the Alpine Sk}pe,
IG 10 zoning in this a~ea, Concern was voi~t by Council mcmber~ rogardiug lots under tm aero
the K-10 zone given tho slope of the area.
We look forward to a rate'wed effort of cooperation between rite del)a~i~oimt and the Chv~ak
Comnmnity Council. We ~re eonce.mcd that tho preservation of our previous resources is a top
priority. The elevated nitrate levels in the Anchorage area are indicative cfa larger problem. With
urban density itt rural areas we are putting septic into our ground water and into tho public's wolla.
This ia an issue that MOA cannot continue to ignore anymore.
()ur next meeting is June 20th. We hope you are able to ioply to these eoltooma prior to that ac
new information can bo made available to the Council.
Sincerely,
Chuglak Commonalty Council
Sharon Minseh, President
MUNICIPALITY OF ANCHORAGE
Department of Health and Human Services
P.O. Box 196650
Anchorage, Alaska 99519-6650
Date: May 16, 1996
To: Zoning and Platting Division, CPD
Froln: ~[//,..~James Cross, P.E., Program Manager, On-Site/Water Quality
Subject: Request for Comments on Cases due 5/17/96.
The Environmental Services Division, On-Site Services Section has reviewed tile
following cases and has these comments:
S-9910 Potter Point
No objections provided all development is served by public water and
sewer.
S-9911 Duke and Duchess Subdivision.
The existing on-site water and wastewater disposal systems serving homes
on this property have not been approved by DHttS. Prior to approval of
the request, these systems must be documented and the applicant must take
necessmy action to bring the unapproved systems into compliance
with on-site water and wastewater disposal regulations. Rese~we area
requirements may also apply.
Inadequate soils testing, percolation testing and ground water monitoring
has been conducted to confirm suitability for development using on-site
wastewater disposal systems.
~'eas designated for the original and replacement wastewater disposal
system sites must be identified and must meet all criteria specified in AMC
15.65
Supporting documentation on water availability must be provided.
S-9912 Tract 3A, 3B and 3C, Highland Hills #4
Tile following Plat Note must be added: "Prior to development or
subdivision of any tract within this subdivision using on-site water and
wastewater disposal systems, all provision of AMC 15.65 must be satisfied,
including reserve area requirements specified by AMC I5.65.180."
MUNICIPALITY O1: ANCHORAGE
COMIVIUNITY PLANNING AND DEVFLOPMENT
P.O. Box 196650
Anchorage, Alaska 9~519-66so
PRELIMINARY PLAT APPLICATION
A, Please fill in the Information requested below. Print one letter or number per block,
OFFIOE USE
REC'D BY:
1. Vacation Code 2. Tax identification No. 3. Street Address
4. NEW abbreviated legat description (T12N R2W SEC 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34).
~lul~--I~l I^l,~l~ I~l~kl~l~kl~l I~1o1~I I~1~[~1 I~1 I~- ~ ~ ~ ~ ~
I°1~1 I'1-1+1/ /I I I I I I I I I I I I I I II
5, EXISTING abbreviated legal description (T12N R2W SEC:- 2 LOT 45 OR SHORT SUB BLK 3 LOTS 34) full legal on back page.
6, Petitioner's Name (Last - First)
Address °1'd¢~¢;2 ~'~. ~'~O~l~OLx-) ~.
Phone~O~e~3~ Zip ~
7, Petitioner's Representative
Addrass _~1 [.,~ ~,m~¢._. ~,~ .
City_ A ~C kg)P--.A~_-. State
Phone~.7~~ ~ _ Zip %%~"~{
8. Petition Area Acreage
9, Proposed
Number Lots
10. Existing 11. Grid Number 12. Zone
Number Lots
13. Fees
14. CommunityCouncll ~{¥(2~{/~z~
Date:
I hereby certify tibet (I am) (I have been authorized to act for) the owner of the property described above and that I desire to subdivide it in
conformance with Chapter 21 of the Anchorage Municipal Code of Ordinances. I understand that payment of the basic subdivision fee is
nonrefundable and is to cover the costs associated with processing this application, tha~ it does not assure approval of the subdivision, lalso
understand that additional fees may be assessed if the Municipality's costs to process this application exceed the basic fee, I further
understand that assigned hearing dates are tentative and may have to be postponed by Planning Staff, Platting Board, Planning Commission,
or the Assembly due to administrative reasor~s,
'Agents must provi~e/e written proof:of d tt~horization.
Please check or fill in the following:
1. Comprehensive Plan 7- Land Use Classification
Residential
Commemlal
Parks/Open Space
Transportation Related
Marginal Land
Commercial/Industrial
Public Lands/institutions
Alpine/Slope Affected
Industrial
Special Study
Comprehensive Plan -- Land Use Intensity
Special Study
Dwelling Units per Acre Z, ~
~ Alpine/Slope Affected
Environmental Factors (if any):
a. Wetland
1. Developable
2. Conservation
3. Preservation
b. Avalanche ~',,~ ~,
c. Floodplain ~,[/~
d. Seismic Zone (Harding/Lawson)
D. Please indicate below if any of these events have occurred in the last five years on the property,
Rezoning Case Number
Subdivision · Casa Number
'Conditional Use Case'Number
Zoning Variance Case Number
Enforcement Action For
Building/Land Use Permit For
Army Corp of Engineers Permit
Legal description for advertising.
Checklist
40 Copies of Plat (Long Plat)
30 Copies of Plat (Short Plat)
Reduced Copy of Plat (8 ¥~x 11)
CeRificate to Plat
Aerial Photo
Housing Stock Map
Zoning Map
Fee
· Drainage Plan
Topo Map 4 Copies
Soils Report 4 Copies
Pedestrian Walkways
Landscaping Requirements
Waiver
Water:
Sewer:
. Private Wells
Private Septic
Community Well
Community Sys.
Public Utility
Public Utility
VACATION OF RIGHT-OF-WAY OR OFFICE U,~iE
EASEIVJENI' APPLICATION
Munlclpll!~y of Anchorage ~sc'o sY:
DEPARTMENT OF COMMUNITY PLANNING VERIFY OWN:
P.O, BOx 6650
Anchorage, Alasl(a 99502-0650
A. Please fill in the reformation requested below. Print one letter or number per block, DO not write in the shaded blocks.
Case Number (IF KNOWN)
1. Vacation Code
Abbreviated Description of Vacation (EAST 200 FEET SOME STREET)
Existing abbrewated legal description (T12N R2W SEC 2 LOT 45 OR SHOR'r SUB BLK 3 LOT 34).
Petitioner's Name (Last- First) 5. Petitioner's Representative
Address _c~/l ~.' A~J~--,
City ..~>~' (~)~- iA State ~A'-d'-
Phone NO. t/..~d~'~ ~'~' ~' ~ ¢~('¢ 8ill Me. __
City A ~ObOf&A ~'¢. State
Phone No. ~o-'/~ ~.'7~~ (~,~4~__ [3ill Me
Petition Area Acreage 7. Proposed Number 8. Existing Number
9. Traffic Analysis Zone
t0. Grid Number 11. Zone
12. Fees
13. Commun,ty Council
B. I hereby cemfy that (I am) (I have been authorized to act for) the owner of the property described above and that I desire to
vacate ~t m conformance with Chapter 2 t of the Anchorage Mumc~pal Code of Ordinances. I understand that payment of
~he basra veL;trion fee is nonrefundable and ~s to cover the costs associated w~th processing this application, that ~t does
not assure approval of the vacation. I also understand that additional fees may be assessed if the Municipality's costs to
process th~s application exceed the basic fee. I further understand that assigned hearing dates are tentative and may have
to be postponed by Planning ,Staff, Platting Board, Pianmng Commission, or the Assembly due to administrative reasons.
C. Please check or fill in the following:
1. Comprehensive Plan ~ Land Use Classification
~ Residential
Commercial
Parks/Open Space
Transportation Related
2. Comprehensive Plan -- Land Use Intensity
Special Study Y
3. Environmental Factors (if any):
a. Wetlanci ~ ,~
1. Developable
2. Conservation
3. Preservation
Marginal Land
Co m mercial/I ndustrial
Public Lands/Institutions
Alpine/Slope Affecteci
Industrial
Special Study
Dwelling Units per Acre
Alpine/Slope Affectecl
b. Avalanche
c. Floodplain
d. Seismic Zone (Harding/Lawson)
Please indicate below ~f any of these events have occurred in the last three years on the property.
Rezoning Case Number
~ Subdivision Case Number
Conditional Use Case Number
Zoning Variance Case Number
Enforcement Action For
Building/Land Use Permit For
E. Legal description for advertising.
F. Checklist Waiver
30 Copies of Plat
Reduced Copy of Plat (8'/2 x 11)
Certificate to Plat
Fee
Topo Map 3 Copies
Soils Repor~ 4 Copras
Aerial Photo
Housing Stock Map
Zoning Map
Water: {// Private Wells Community Well
Sewer: ---'-'-'-r/-- Private Septic Community Sys.
Public Utility
Public Utility
PRoPoSED EASEMENT VACA'r]ON /
/'
I
MFNT
BLO(;~ 1
2
J [/
ROAD EASEMENT BK 1365 PG 824
2 3
BLOCK
2O
DUKE AND DUCHE88 8LJBDIVISION
PROPOSED EASEMENT
VACATION AND DEDICATION.
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MUNICIPALITYOFANCHORAGE L*.
I:IEPARTMENT OF HEAl. TH AND ENVIRONMENTAL PROTECTION
SOILS lOG -- PERCOLATION 'l?Eb~'
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MUNICIPALITY OF ANCHORAGE
DEPAI~TMENTOF HEALTH AND ENVIRONMENTAL )ROTECTION
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COMMENT~__
TEST
PllqCO LATION RATff ,,. .Im~ulelh*'~l
December 3, 1996
Stephen W. Powell
21535 Canyon Drive
Chugiak, AK 99567
Jim Cross
Mtmicipality of Anchorage
Anchorage~ AK. 99519
Dear Mr. Cross:
REF-. Duke & Duchess Subdivision (S 9911) - Potable Water Evaluation
Per the Platting Board requirement 12, summary of action dated June 5, 1996,
a report on the water availability for the proposed subdivision was snbmitted
by Kenneth M. Duffus. This report describes an investigation/evaluation
conducted by Terrasat Inc. which purports to verify an adequate potable
water supply for the development of these lots.
A close study of the Terrasat report prompted me to point out errors in tiffs
report regarding content and conclusion. These errors are higl~ighted in the
attached document.
Please consider the contents of the attached document when you make your
judgment to accept or reject the Terrasat repm~ as sufficient verification of
adequate potable water supply. A copy of the attached document will be
submitted to the Chugiak Community Council.
If you have any questions please contact me at 271-5448.
Thank you for your consideration of this request.
Introduction
The Platting Bom'd is being asked to accept a hydrogeological and geophysical
investigation report produced by TERRASAT liNC., as sufficient to meet their 5
June, 1996 requirement to "prove there is adequate water for the subdivision
(Duke & Duchess) in this location".
This report is constructed to point out the Terrasat report shortcomings. Text,
presented as follows:
UWe also recommend that no further studies be conducted at this
site,"
is taken directly from the Terrasat report.
The TERRASAT report draws erroneous conclusions based on outdated
infornmtion and/or information not in evidence. The TERRASAT report should
not be considered sufficient to prove adequacy of water for this subdivision.
Additionally, it falls woefully short of providing evidence of non-impact on
surrounding well water supplies on the hill.
Examples of poor research, biased information gathering, wealc report writing,
mid improper conclusions are resplendent in their report. These begin in the
EXECUTIVE SUMMARY and continue throughout. The specific instances are
as follows:
"The aqu{fer has a storativity around 0,001 and a trar~smissivity
around three gp d/ft'
Storativity - result of compression of aquifer and expansion of the confined
water when head (pressure) is reduced during pumping.
Reference to storativity is meaningless in this context. It is a dimensionless
number. "Transmissivity around three gpd/ft' is extremely low.
"This ~ggests that the well nmy produce up to 1200 gpd ~f the aquifer is
given ttnl~ to r~cover qfter each .pumping event. 1200 gpd is an adequate
supiJlg te support up to eight bedrooms."
This last sentence is true when taken by itself. 150 gpd/person is adequate,
however these calculations are of a design flow based on storage, not well
production.
Report Inadequacies
Terrasat's INTRODUCTION
Terrasat addressed only two of four requirements that they outlined as the
"purpose of our study".
· Evaluate the aquifer beneath the proposed s~bdivisio~ to
predict both short and long term yields and capacities,
· Determine potential impacts te the neighbors if this aquifer is
further developed.
· Support aquifer testf~ndings with borehole log~ng, GIS~ and
air photo interpretation.
· Identify possible alternative sources of water.
Terrasat gathered no data on potential impacts to the neighbors and they did
not identify alternative sources of water. The data gathering of the borehole
logging, GIS, ,and air photo interpretation was halfhearted and biased. This is
based on the Chugiak Community Council well production information
gathered ,mud presented in the NEW WE[-[- DATA area of this document.
Project design
"We have reviewed the logs and identified the depth of casing,
major rock units, and fractured zones within bedrock that mall
contribute significant amounts of water to the wells..
Under what conditions might this take place? What does this statement
mean?
AQUIFER TESTING
"Water levels in the observation well were monitored to dete~nine the
potential impacts to the neighbors caused by the aquifer test.'
Nowhere, in this Terrasat report, was a relationship established between the
water levels in the observation well and neighbor's wells. Unless neighbor's
wells were monitored, during the flow test, there can be no correlation between
them. Therefore, any. conclusion about "potential impacts to the neighbors"
forwarded by Te~'rasat's report are false.
Conclusions ~ Recommendations
"We interpret that the major fracturo zone identified in the well
log,.~ ma,~! be the major contributor' of water to the well,"
This is supposition without basis.
"We also.see that the well does not full!l pass through this zone
and believe that deeper drilling_ma_a_a_a_a_a_a_a_a_~y intercept more water bearing
fractures..
This is a huge leap of faith for the average man. Terrasat has not provided
sufficient evidence that deeper drilling will intercept anything. There are seven
wells within 1000' of the production well that average a depth of 558.57' and
produce an average of 0.91 gpm. One 600' well is dry. Deeper drilling may
not intercept more waterH
~Our investigation show~ that the chanee.,~ of finding water at
other locations within the proposed Duke 8~ D~chess Subdivision
are good."
2
This conclusion'is not based in fact. The tests outlined and reported on in the
Terrasat report in no way support a prediction of success in future drilling in
the subdivision. They have provided evidence of two separate aquifers, one for
the production well and one for the monitor well. They have provided that they
are not connected. They have not provided data to suggest anything more.
"Our. investigation suggests that the impact on sur~'ounding wells
should be small to nonexistent..
This conclusion is illogical. {Well A's water is drawn down, well B is 500' away
from well A and it's water level is monitored fa-id it does not fluctuate. Well C,
D, E, F, and G are all within a 500' radius of well A. Well's C thru G are not
monitored. It's unknown if well's C thru G have water in them or if their water
level's fluctuated during the draw down on well A. This is a simple statement
which lays out the facts of a situation. Most elementary school children will
draw the correct conclusion, that is, occurrences in A do not..~a'ppea~r to
effect B.) Nothing more (about surrounding wells) can be inferred or suggested.
Terrasat's conclusion suggests they do not understand as much as the children
in the example or some portion of their investigation was not included in their
report:.
"Large water level differences suEgest that at least two unconnected
aquifers occur within the bedrock and each well tapl~ a different
aquifer. Thiu means that pumping of one aquifer would not affec~
the water in an adjacent aquifer?
Monitoring of one aquifer while pumping the adjacent aquifer does not produce
sufficient empirical data to mal~e a blanket statement that, ~...pumping of one
aquifer would not affect the water in an adjacent aquifer? Your attention is directed
back to the example of the adjacent wells above.
,We also recommend that no further studies be conducted at thiz
site?
?. Was this last recommendation a misprint?
New Well Data
The Terrasat "Well Yield Map based on Available Logs" (Figure 1) seemingly
depicts, with colored circles, a picture of well yield on and about the Duke &
Duchess subdivision, This map shows 30 well sites and their approximate gpm
yield. Data to produce this map comes from their "Well Information Database".
There are 60 data columns in the "Well Information Database". Why are only
50% depicted on the 'well yield map?
Three of the'30 wells (10%) are now dry. Data has been gathered that shows
well yields on 36 additional wells. The wells closest to the Production well are
not accurately depicted on Terrasat's map. These wells are located on the
Swanson property.. Both wells go dry during the year ... they do not produce 1-
4.99 gpm as-represented by Terrasat. i The next closest neighbor's wells are the
Kirks. These wells produce 50 gallons per day (gpd).
3
COnclusion & Recommendations
The Terrasat Report does not satisfy the Platting Board, 5 June, 1996
requirement to "prove there is adequate water for the subdivision (Duke &
Duchess) in this location".
The Terrasat Report does not answer the four requirements that they outlined
as the purpose of their study.
The Terrasat Report misrepresents data and draws erroneous conclusions
based on 20 Year old information.
It is recommended that the Terrasat Report be considered by the Platting Board
as insufficient to prove there is adequate water for the subdivision.
It is recommended that any future conditions define "adoquate water"
4
MUNICIPALITY OF ANCHORAGE
MEMORANDUM
Date: November 20, 1996
To: Jerry Weaver, Supervisor, Platting Section
//~//?[fi~.¢ommunity Planning and Development
From:(.q/-L~a.~me~' Cross, P.E., Program Manager,
On-Site
Services
Subject.~ Duke and Duchess Subdivision.
I have reviewed information on the Duke and Duchess Subdivision case (S-991 i),
including soils information for suitability to support on-site wastewater disposal systems,
and an hydrologist's report on the area's capability to produce an adequate supply of
potable water.
I have been able to determine that the subdivision can support on-site wastewater disposal
systems. However, due to the community interest itl the water supply question, I would
like to withhold my recommendations on this issue until the area residents have had an
opportunity to publicly voice their concerns at the next meeting of the Platting Board.
It is my understanding that the next Platting Board meeting is on December 4, i996 at
7:30 PM. I plan to attend.
Attn:
Lab
N%lmbe= Method
Date Date
A.'t48045 S}I 4500'2
TUE 11',43 DESIGN BRRNOH
FAX NO;,; 190'/2494409
P, 03
J..- ,L]l., .
My nam~ liVe'on:'llll ( as come to mY concern that ~
Duke and DOchess Subdivision is going to put in fi new homos 'n the area, I am conoerned about
this because there is all ready a water problem Ul) here and I believe that this will only make
matters wors~ for all of us. I currently have, two wells on my property. .:
Thanks,
MUNICIPALITY OF ANCHORAGE iMOA) .;
HEALTH AUTHORITY APPROVAl. (HAA)
B SEPTIC/tlOLDINO TANK DATA
r
SUM IVAN WATER WELLS
~DRESS ~' ~ ~ ~" & ' ~ ,~" 'StAt C LVELO'WA~R~
~RHIT h~IBER .................................. KIND OF CASING
rum ' r~rt. lo~L~4~. .~ F~ ~F * _F .
Fh Io Fh
rom .... FI, to ..... Fl, -~ ~ ~ II
ISCL INFOR,~IATION:
/ ?. ;'..t c 6'~
A WELL DATA
MUNICIPALITY OF ANCHORAGE {MOA)
HEALTH AUTHORITY APPROVAL (HA.&)
CHECKLIL~T-FEBRUARYIg84- - ~ -, '. ' - ' ~.
Welt ClnsS~hcnhon ...~Z ,v_~ ~C. ....... A, O, G, D.£D, Appr .'~1 (Yt,)
~ G out~ .... , ,- ·
SlnhC Wnmr Level -- ~,?~ ................ : - ~mp ~t At ~
Casing He,ght Above O~ou~d -.~ ....... ~t~ly ~M ~ ~ (YIN) , ~
[lecmcal Wrong m Comlud IY,N) .... ~- ..... ~1~ AtOU~ W~ (Y/N) z ~ ' '
To Noa~.st Edge el AbsO~pho~ Fmld on LOt ,_/~¢ ~ '_~ Ad~ng LOll ~ ¢ ...... .
SEPTIC/HOLDIN(1 TANK DATA
St,lndptpo~, IY, N) --.~/- ....... AIr,hglll Cap5 (Y~N} . ~ = FC4NId&IIO~ Cteanou! [YIN) .~--
~,p~ess,on over ~ank {Y~N) .... ~ ......... Date Last ~ml~ ---~/)~
MUNICIPALITY OF ANCHORAGE (MOA)
HEALTH AUTHORITY APPROVAL
CHECKLIST- FEBRUARY lg~4
WELL DATA
Sa cW~te Leve ...~..~ ~. ..~mp,mtAt
Casing Height Above ~round ~.~2~ .... ~nta~a on Casing{Y/N)
Standp,pes {Y/N) ~ ~ Alrqlght ~ps (~tNJ ~ ~ '~- Four~ation Cba~ut
Holding T~n~ Ehgh-Wnter A~a~m (YIN) .~..~-- ~ ?': --..Te'~?rY, ,'~;',; -~'?H°tdmg-~ Tank
To Wnter-Supply Well _~_~ ..... ' ,- To~mg Foundation, ~1
To Stroam. Pond. Lathe, or Major Drainage [
Pago t ol 2
~11 ~ ~o~nt (Y~ ' ''into ~le~d/~ /97]-
Static ~tor ~1 . ~-- / ~ ~t At ~'~
Casino I~ [~ht ~ Gr~nd /~ ~' Sanit~ ~al ~ ~si~ ~) ....
~paratica Dista~s fr~ ~11~
TO ~a~st ~ of ~tion Field ~ ~,t~D ~t (~ ~Joirl~
To ~arest ~bllc ~r Lt~ /~ To
Wator S~lo ~st ~nult~ I,IL ~{~/' ~. - .- .~ ~/ ~ p~c ~-~ . y ,.,
SC~IC~' T~ ~TA
~nto Installed_ /~) .~' ~ C~ntS
Hold[r~ Tack Hloh-~ter Alas ~Y~) ~ ~)~ra~ ~ldi~ Tank mrmt ~Y~)'~
Se~roti~ Dista~ [r~ ~ptlC~ Ta~l
TO ~rty Lf~ /~ ~ ., ~ Dl~al Field_
(Pap) I of 21
2-15-84
A, B, or C, ~ttach
Cased to
FROM WELL LOG
AT INSPFCTION
g~p,m. ,~ '-f~ _g.p.m, ·
~ISTANCES ~RpM WELL 'to:
onbt lOot ~ ~IOna~a~bts.
~ e~er~"maln """': ~ ~[~ '"" 1~5~ s~r ~l~ctear~t_
AMPLE RESULTS: '~ '~,~ ,' : ' ' :: '-'~ .~, ·
5E~~TANK DATA . ;F .:..:-.': ~',.:-.'-... '....' ...
~ ~ ~, 51[~t "~;'~ ~",~ Y~b, .. ,-,.' .... ~ t~,~t L~'t:. ~'{: ~',~ } ~- -')~ ~'~ { ,'~, . ~,."~.. ?~'
~stall~ ' O~ Tank slze ~, I ~o~> ...... ~aaments.
. F~;~atbn clea~ut ~. ~/ ' [~ptessbn~Y~
water alam~ ~" ' ' ~ tested (~)
~TION DISTANCES FROM SEPTIC~I~LT~K TO: · ',
~ line /o ~ ~' ~n tlelcl ]~/ Water ~l~seMce line
ON
Well
· : ! WELL LOG
Give details of format on~ {~ne~r~,~,
MUNICIPALITY OF ANCHORAGE (MOA)
IlEAL'rtl AUTHORITY APPROVAl- (J'~.A)
W£1.L DATA
Weft Log Present
Total ~plh
RECE
....
To Sept c/Ho d ng Tank on LO I ~ r ' ~
To Nearest Ed o el Absorption Field on Lot ..~-- ~. Of 1 Ad~nlng Lo~L J I I II . r ~ i J
Cloanou~M~nhole · ~ T0 ~l ~ . ,,. .... - .
Waler Sarnplo Teal Results --- -~' ~ ~Z~ ~
~_._~ , . ,.
S~.PT~C/HOLDINO TANK DA'rA
81andp~P~S ~)/,Nt .... Air.light C~ps (~'~,, , , Foundation Ct~ano~ ~ ........ . ~
Water Mah~Se~ce Line _-- , ~ I e,~: ,~ ~i ' ', ~ TO Gffeam, I'~, take, m' Majo~ Dfalnlge
Page 1 el 2
OWNER OE L^NO ..L'
ADDRESS ~/ ,/
LEGAL I)~CRI~