HomeMy WebLinkAboutSEAVIEW HEIGHTS Block 2 Lots 5-A to 5-D2w.
MUNICIPALITY OF ANCHORAGE_
DEPARTMENT OF HEALTH & ENVIRONMENTAL PF30TECTION
ENVIRONMENTAL HEALTH CASE REVIEW WORKSHEET
❑ PLATTING BOARD ❑ PLANNING & ZONING
CASE NUMBER
NAME
S-5222
Lots 5A - 5D Block 2 Seaview Heights S/D
DATE RECEIVED
January 3, 1980
COMMENT TO PLANNING BY
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January 21, 1980
FOR MEETING OF CASE__' !=�_ - OFOWN
ID PUBLIC WATER NOIR AVAILABLE TO PETITION AREA
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FJ PUBLIC SEWER �VOY,AVAILABLE TO PETITION AREA
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4YE:ST' 15 TH AVE NCHORAGE
..e_ PLAN MACHINE. -�, PRODUCT
i' r MATERIAL
l_7 DESIGN CONSTRUCT ION O RESOURCE DEVELOPMENT
203 WEST 15TH AVENUE e ANCHORAGE, ALASKA 99501 • TIELEPHONE: 907.274-5235
ENGINEERING REPORT
For: Lots 5A Thru 5u, Block 2
SEAVIEW HEIGHT'S SUBDIVISION
Description of the Site
Geologically, the site is described as a Delta Deposit
which consists of variable depths of overburden underlain
by clean sandy gravel. Structurally, the site surface`
includes a glacial esker with a kettle or bowl -like
formation which lies within the site. The esker then
extends in a northeasterly direction. There are elevation
differences of approximately ninety feet within the confines
of Lot 5. To date, Lot 5 has a residential building and
accessory buildings located in the southeast corner of
the lot. The low area has been partially frilled with
waste material excavated from other projects. This material
includes peat, clay, wood with mixed sand and gravel etc.
The north half of the site is relatively undisturbed. The
area to the north of the site is an unreclaimed gravel
extraction area.
Proposed Development
The unique characteristics of the site and R-•lA coming
restrict the land use to single family dwellings. A
Planned Unit Development could be used, however public sewer
is not available. Even if public sewer were available,
service to this site would be almost impossible to accomplish.
Following exhaustive study, we have determined that a
four --lot subdivision with provisions for on --site water and
sewer is the most sensible plan of development.
After discussion with staff members, it was decided
that a four -lot subdivision with a cul--de-sac would be
practical.. The conditions which support this concept are
- as follows:
1. All lots will be restricted to a common access, Roseland
-- Circle, to Dimond Boulevard.
'a� }s. _ 1� - +1.. ';}r� 11,f F � s =.tai i. t�7,%/µs. %^���. � - 4 -rr nr� rt'e• I ti:.�-,'r r�Afs -.f �P t, �'}c li::----"r� r r�r �i -
gyp, Seaview Heights Subdivision
�• Engineering Report page 2
2. A plat requirement that any building placed on Lot 5B
shall have a foundation designed by a registered engineer.
3. The street construction for Roseland Circle shall conform
to the design submitted with the revised subdivision plan.
4. Use of the site as a disposal area shall be permitted
until the construction of Roseland Circle is completed
and all fill slopes are completed. The maximum fill
slope shall be four horizontal to one vertical.
5. The developer_ shall be .responsible for structural main-
tenance of Roseland Circle relative to line and grade for
a period of two years after the street surface is completed.
As an explanation, Condition No. 2 is proposed as an
answer to an Inspection Report by Bert Sumerlin of Building
Safety Division dated August 9, 1.979. Understandably,' the
Building Safety Division is concerned with building safety.
Inspector Sumerlin must have assumed that a building or
buildings were going to be placed on the unclassified fill
without proper design consideration. In the report, he
stated that a stop -work order was being issued at that time.
There was no work in progress on that date, there hasn't
been work done since that date and there are no plans in
process for placement of a building on unclassified fill
in the proposed subdivision. However, if a building should
ever be placed on Lot 5B, Condition No. 2 would stipulate
design by a registered engineer. In addition, Lots 5C and
5D have desirable building sites on undisturbed ground and
Lot 5A is presently developed.
Summary
There are two adverse conditions which accompany this
project. First, construction of Roseland Circle on unclass-
ified fill will result in some settlement and deformation
of the street surface. Secondly, foundation conditions on
Lot 5B are questionable; thus an engineered foundation
consisting of either piles or drill piers will be necessary
for any building_ which may be placed on this lot. The one
exception would be a commercial greenhouse so constructed
that minor differential. settlement would not affect its
F�� �17�,*" 7. Fxi ff 3j -1 5i - 4i g �s ii J .jn ! {._ .it -.a i , -s
Seaview Heights Subdivision
Engineering Report page 3
safety. However, this use would require a special. exception.
The above adverse conditions are covered by subdivision
Conditions Numbers 3 and 5 and Number 2 respectively.
By'�t��
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