HomeMy WebLinkAboutAccess Road - RAP Letters / Memos - 3/29/1993 MASON COUNTY
PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER
Shelton, Washington 98584
March 29, 1993
INTER-DEPARTMENTAL COMMUNICATIONS DATE
TO: GRACE MILLER, Planning Department
FROM: ALAN A. TAHJA, Department of Public Works
SU BJ: Engineering review of St. Hugh Episcopal Church in Allyn
Grace;
I have reviewed the plans for St. Hugh Episcopal Church in Allyn and have the
following comments;
(1) No legal access to the subject property has been
shown. A portion of Fawcett Street is a vacated street
as shown on the plans, by action of the Mason County
Commissioners (see attachment pg 6) . Portions of
Wheelwright Street have been vacated (by State statute
and by County Commissioners action) . By state statute,
platted roads that were not developed within five
years of the plat development (Allyn) , revert back to
the prior owners. Therefor Wheelwright is viewed as a
private easement available to the ownerships abutting
it within the plat. I am attaching some correspondence
concerning Wheelwright Road and undeveloped plat roads
in general .
(2) An erosion and sediment control plan (E&S plan) will
be required for the proposal (designed to provide
water quality for a 6 month design storm defined as
64 % of a 2 yr. storm event) along with a permanent
stormwater control plan, stamped by a Professional
Engineer registered in the state of Washington,
designed to infiltrate as much stormwater as
practical . What stormwater cannot be infiltrated must
be restricted to a release rate of half the 2 yr.
storm event runoff based on pre-development conditions
and to 100% of the 10 through 100 year storm events
based on pre-development conditions. For the Allyn
area, precipitation for a 100 year storm event is
expected to be 7.0 inches in a 24 hour period, 5
inches of rainfall in a 24 hr. period for the 10 yr
storm event and 3.5 inches of rainfall per 24 hours
for the 2 yr. storm events. Because of the stormwater
1 NOAA Atlas 2, Volume IX, figures 25,27 & 30. Isopluvial maps of western
Washington dated February, 1992
File: H:\LETTERS\EPC-ALN Page 1 of 2
problems already being experienced in the Allyn area,
these minimum standards should be strictly enforced.
Normally the E&S measures should precede any earthwork
done to the site, but I have visited the site and see
that the clearing appears to be substantially complete
and me requiring an E&S plan is after the fact. The
swale alluded to on the Utilities and Grading plan
might have existed when these plans were prepared, but
is now obliterated and the present stormwater is
collected in a small settling pond and discharged
through two 4" PVC pipes to the opposite side of the
neighbor's property into a wooded area and ultimately
into the drainage pond in the Allyn Mobile Home Park.
The Allyn Mobile Home Park pond is already taxed to
capacity and any discharges into this basin/watershed
should be carefully analyzed.
(3) Section 9.03 of Mason County Parking Ordinance (Ord. #
815) requires "one parking space for each 4 seats or
one per 50 square feet of floor area for assembly not
having fixed seats" . The plans provided me show that
the Nave and Narthex have a combined capacity of 327
seats. This suggests that 82 parking spaces should be
provided for them alone. The architect shows the total
building capacity as 342 occupants which suggests that
85.5 parking spaces should be provided. The plans I
have show 63 parking spaces planned. This should be
increased to a minimum of 85 spaces.
ALAN A. TAHJA - -- -
Engineering Support
AAT:aat
cc:MLY
attachments: 1 (6 pages)
File: H:\LETTERS\EPC-ALN Page 2 of 2
MASON COUNTY aaav ' 3q- °0 i L fl
PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER
Shelton, Washington 98584
August 26, 1994
INTER-DEPARTMENTAL COMMUNICATIONS DATE _ _
TO: JASON MANASSEE, DCD - Planner
FROM: AL'N A. TAHJA, P/W - Hydraulic Engineer
SUBJ. _St. Hugh Is Episcopal Church Access Road Upgrade
Jason,
I've reviewed the proposed plans for the reconstruction of the access
road for the St. Hugh's Church proposed in Allyn, Washington, and find them
acceptable except for its compatibility with the proposed stormwater detention
facility discharge location/needs.
The proposed detention facility relieves itself via a 12" CMP to the
lower side of Wheelwright street where no major ditch construction is planned.
Mr. Robert Boehm P.E. , designed and submitted the plans for the road
reconstruction and justified the lack of armoring the ditch on the lower side
of Wheelwright because its only function was expected to be to convey the
stormwater runoff from a small portion of the road surface. The relationship
between the road's drainage requirements and the building improvements
stormwater needs was overlooked. Two options appear to be immediately
available. An armored ditch could be constructed along the lower side of
Wheelwright Street, or the discharge from the detention facility could be
redirected to the upper side of Wheelwright Street and run down the proposed
armored ditch. I have contacted Mr. Boehm and he understands my concerns and
will be contacting the proponents to discuss how they want to remedy this
issue.
A check of my files on this proposal reveals that an O&M (operation &
maintenance) declaration has not been submitted to cover the stormwater
facilities for this project when completed. Attached please find a copy of an
O&M covenant that has been reviewed by the Mason County Prosecuting Attorney's
office and approved for use.
To my knowledge, these are the last issues before Public Works to be
resolved regarding this project.
4LZi-
TAHJA
cc: Boehm
File: H:\WP\LETTERS\ST-H HM.IDC
34-- �I
MASON COUNTY 1-7L1 y 0 s Vz_
PUBLIC WORKS DIRECTOR/COUNTY ROAD ENGINEER
Shelton, Washington 98584
JaMiary 4, 1995
INTER-DEPARTMENTAL COMMUNICATIONS DATE
TO:
DON BRUSH, DCD - Planner
FROM: ALAN A. TAHJA, P/W - Hydraulic Engineer
SUBJ:
St. Hugh's Episcopal Church Access Road Upgrade
Don,
Mr. Robert N. Boehm, P.E. , delivered a revised set of plans for the upgrading
of Wheelright Street in conjunction with the planned development of the Church
Party
The discharge from the Church's detention pond has been directed to the upper
side of Wheelright Street, and the applicant is proposing armoring the
Wheelright ditch from Station 0+32 to Sta. 4+00 to accommodate anticipated
flows.
In my last correspondence with Jason (IDC dated 8/24/94) , I forwarded him a
copy of an Operation and Maintenance (O&M) Covenant to be forwarded to the
applicant. This element of the stormwater plan still needs completion,
otherwise, I am satisfied with the stormwater plan and improvements as
submitted to date.
AAM
AiA
A. ZVUA
File: H:\WP\LETTERS\ST-H-B2M.IDC