HomeMy WebLinkAboutLog022
. .
e
e
JEFFERSON COUNTY
DEPARTMENT OF PUBLIC WORKS
P.O. Box 2070
1322 Washington 8t.
Port Townsend, WA 98368
(360) 385-9160
Frank Gifford, Public Works Director/County Engineer
TO:
Development Review Division
Department of Community Development
James W. Pearson, Project MaruJ.g~
ill rn @ m 0 " 1m
ocr 2 5 I99t
MEMORANDUM
FROM:
JEfFERSON COlliiTY
PERMIT CamH ,,',.. "
DATE:
October 21, 1999
RE:
ENV99-0006 Construct roads in Irondale Acre Tracts; Jacobsen Land Partnership
STATE ENVIRONMENTAL POLICY ACT REVIEW
After review of the environmental checklist for the referenced proposal, the Department of
Public Works has the following comments:
Sections 1-8 of the checklist refer to Earth.
The proposal includes clearing and grading to construct roadways that could result in adverse impacts
related to erosion and sedimentation.
The proposal is subject to the requirements of the Jefferson County Stormwater Management
Ordinance. Based on compliance with the Ordinance the proposal not likely to result in significant
adverse impacts to Earth. See below under Drainage, Erosion Control, and Stormwater,
Sections 12-22 of the checklist refer to Water (including storm water).
The proposal would create additional impervious surface that could result in significant impacts related
to the increased volume and peak flow of stormwater runoff from the site.
The proposal is subject to the requirements of the Jefferson County Stormwater Management
Ordinance. Based on compliance with the Ordinance the proposal not likely to result in significant
adverse impacts to Earth. See below under Drainage, Erosion Control, and Stormwater.
LOGfTEM
#_~
100% Recycled Paper
e
e
Sections 67-73 of the checklist refer to Transportation (including new roads or improvements to
existing roads).
The roads proposed for construction are served by Washington Street, County Road 576409. It is
opened from its intersection with Oak Bay Road for a distance of 0.27 miles. It has a 14 feet wide
traveled way with a chip seal surface and 2 feet wide shoulders. The current traffic volume is
approximately 50 average daily trip ends (ADT),
Opening McKinley and Lincoln Streets would provide access to 40 lots in Irondale Acre Tracts that are
currently not accessible. The Department projects that residences constructed on these lots would
generate approximately 10 ADT per residence. The project would increase the total ADT on
Washington Street to more than 400. The ADT on McKinley and Lincoln Streets would be greater than
100.
The Department has adopted the roadway design standards of the American Association of State
Highway and Transportation Officials (AASHTO) Policy on Geometric Design of Highways and
Streets. The AASHTO design standard for a rural local access roadway with 400-1,500 ADT is a 20
feet wide traveled way and 4 feet wide shoulders, The AASHTO design standard for a rural local
access roadway with less than 400 ADT is an 18 feet wide traveled way and 2 feet wide shoulders.
Lincoln and McKinley Streets would both be opened for approximately 3,600 feet southerly and 350
feet northerly of Washington Street. The proposal should make adequate provision for traffic
circulation and access by emergency vehicles (fire, sheriff, and ambulance). The Plat of Irondale Acre
tracts provides for this by means of a grid system of platted streets. Due to the low density of the plat, it
is not necessary to open all of the east-west streets connecting McKinley and Lincoln Streets. Adequate
circulation and emergency vehicle access could be achieved by constructing turnarounds at the
northerly and southerly ends of McKinley and Lincoln Streets and by opening one of the cross streets,
preferably Monroe or Madison, between McKinley and Lincoln Streets.
The Department has adopted the current edition of the Washington Department of Transportation
(WSDOT) Standard Specifications for Road, Bridge, and Municipal Construction as its standard for
roadway construction materials and methods.
The Jefferson County Comprehensive Plan policy regarding land development standards (Policy TRP
4.8) requires that developments "Ensure that unacceptable safety hazards will be mitigated. The
definition of unacceptable will be based on analysis of the existing facility(s) and the current standards
for that facility(s) contained in commonly used and adopted transportation publications,"
The proposal is likely to result in a significant adverse impact to the County road system. Based on the
analysis and policy above, the Department recommends the following mitigation measure intended to
avoid impacts to the County road system:
. The applicant shall enter into an agreement with Jefferson County regarding the proposal. The
agreement shall specify the following:
2
.
e
. The applicant shall construct McKinley and Lincoln Streets with an 18 feet wide traveled way
and 2 feet wide shoulders, a minimum 6 inches compacted gravel base over compacted
sub grade, and a minimum 2" compacted crushed surfacing top course. Prior to commencing
construction, road plans shall be submitted to the Department of Public Works for review and
approval.
. The applicant shall construct roadway improvements to Washington Street from Oak Bay Road
through the intersection with Lincoln Street. Washington Street shall be improved to a 20 feet
wide traveled way with a chip seal or asphalt concrete traveled way and 4 feet wide gravel
shoulders. The roadway section shall be designed by a licensed civil engineer and approved by
the County Engineer prior to commencing construction.
. The applicant shall construct turnarounds at the northerly and southerly ends of McKinley and
Lincoln Streets.
. The applicant shall construct either Monroe or Madison Street to the same design standard as
McKinley and Lincoln Streets,
. The agreement shall be based on roadway plans and an engineer's estimate of improvement
costs prepared by a licensed civil engineer. The estimate shall be reviewed by and be acceptable
to the Jefferson County Engineer.
. Construction methods and materials shall meet the Washington State Department of
Transportation Standard Specifications.
. Roadway plans shall meet the requirements of the Washington State Department of
Transportation Plans Manual.
. The applicant shall obtain a permit to work within the Washington Street right-of-way and to
open the McKinley and Lincoln Street rights-of-way from the Department of Public Works.
Work shall be carried out in conformance with the standards set forth in the permit.
. All street signs, traffic signs, and traffic striping shall be installed prior to final approval.
APPLICATION REVIEW
After review of the proposal, the Department has the following recommendations:
A. DRAINAGE. EROSION CONTROL. AND STORMW ATER MANAGEMENT
The Jefferson County Stormwater Management Ordinance sets standards for erosion control
and stormwater management. The Ordinance adopts the requirements of the Washington State
Department of Ecology Stormwater Manaeement Manual for the Pu~et Sound Basin. The
standards are based on the amount of impervious surface created and amount of land disturbing
activity performed.
Common impervious surfaces include, but are not limited to, roof tops, walkways, patios,
driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed
earthen materials, and oiled, macadam or other surfaces which similarly impede the natural
infiltration of storm water.
3
, .
.
e
Land disturbing activities means any activity that results in a change in the existing soil cover
(both vegetative and nonvegetative) and/or the existing soil topography. Land disturbing
activities include, but are not limited to demolition, construction, clearing, grading, filling and
excavation.
. The proposal includes the construction of more than 5.000 square feet impervious surface and
more than one acre ofland disturbing activity. The Stormwater Management Ordinance requires
proponents of developments that meet these criteria to implement a Stormwater Site Plan that
includes a Large Parcel Erosion Control Plan and a Permanent Stormwater Quality Control Plan.
The Stormwater Site Plan shall apply Minimum Requirements #1-11 from the Washington
Department of Ecology Stormwater Management Manual for the Puget Sound Basin. A
Stormwater Site Plan that meets these requirements shall be submitted to the Jefferson County
Department of Public Works for review and approval prior to commencing land disturbing activity.
. Approved temporary erosion and sedimentation control Best Management Practices shall be
employed during land disturbing activities. An approved set of plans shall be on site during
construction.
B. PLAN REVIEW AND INSPECTION
. Construction of roads, driveways, parking, and stormwater management facilities requires that the
applicant submit plans for review and approval to the Department of Public Works.
. The applicant shall notify the Department of Public Works during various phases of construction in
accordance with the Department's inspection schedule, Typically the following inspections are
required:
A. Installation of temporary erosion and sediment control measures;
B. Clearing and road sub grade preparation;
C. Placement of gravel base;
D. Placement of compacted crushed surfacing top course;
E. Placement of asphalt concrete pavement or chip sealing;
F, Construction of stormwater management facilities;
Additional inspections may be necessary based on site-specific conditions or the nature of the
project.
C. GENERAL COMMENTS
Fee Requirement
. The applicant shall pay all costs of work incidental to the proposal before final project approval is
granted, In accordance with the Jefferson County Department of Public Works Fee Schedule, the
Department's current fee is $49 per hour,
4