HomeMy WebLinkAboutComments PWE 12/2/2009
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MEMORANDIJM
City of Soringfield
DATE: December 3, 2009
TO: Andy Limbird, Planner
FROM: Clay10n McEachern, Civil Engineer
SUBJECT: ZON2009-00024 L TD PEACEHEAL TH BALDY VIEW DW ACCESS
The subject application concerns construction of a new driveway and improvement of an existing
street to allow for a temporary bus route for the new EM-X line from the Riverbend campus to
International Way.
Applicant's Questions Regarding Public Works:
I. L TD proposed use of swales with infiltration for stormwater. Is this satisfactory to the
. City? Has the City ever considered use ofbio-slopes (ODOT BMP) for stormwater
treatment and if so would that be an acceptable BMP application here? When infiltrating
the water, other than DEQ injection well registration, what other permits would be
required. (i.e. drinking water protection, landldrainage alteration permit)?
This application will be subject to obtaining an LDAP for any portion of the project built
outside of a PIP. The bio slope treatment method appears satisfactory. Current DEQ
regulations stipulate that infiltration structures do not need to be registered if they are receiving
treated runoff, and the bioslope facility appears to meet this requirement.
This area is in the 5-10 year Time of Travel Zone for the Sports Way wellhead. A maintenance
agreement will be necessary to ensure the effectiveness of treatment facility is maintained
during its use. For this type of facility it .should state who is responsible for maintaining the
vegetation that will be the primary treatment method.
2. The project is within the McKenzie River Floodplain. ~revious floodplain analysis by
Peace Health indicates very little impact to the McKenzie River as a result of full buildout
ofthe campus or even the urban growth boundary to current zoning standards. It is
assumed construction of the roadway arid associated stormwater facilities would not be
considered an impact to the floodplain. Would the City require a .Floodplain Overlay
development permit application, giv.en that the proposal would not affect flood flows or
the capacity ofthe floodplain. Please confirm.
. This project is in zone AE with a base flood elevation of 435 and the latest elevation data
available to the city shows this area at 436. It appears that this project will not be subject to the
Floodplain Ordnance. However, this area is still within the.floodplain and the new road will
need to have as little disturbance to the existing topography as possible.
Date Received:_~~i
Planner: AL
3. Baldy View Lane, in places is failing or failed. L TD plans to remediate the roadway for
ride comfort ofthe EmX vehicle with a 2" overlay, but does not plan to structurally
reinforce the roadway. Depending on the duration of Em X on this route it is possible the
buses could further damage the structure ofthe road. L TD proposes to evaluate the road
after it is no longer used for EmX service and rehabilitate at that time if required by the
City. Is this proposal acceptable and what agreements, if any, need to be prepared
between the agencies? Note a similar agreement will be reached between LTD and Peace
Health for impacts to St Joseph Place east of Riverbend Drive.
-Before operations on the temporary access road begin the city will evaluate conditions, this can
be done in cooperation with LTD staff. Any ongoing maintenance needs for the temporary
access road will be done by L TD while the roadway is being used for ErnX ~ervice, including
drivability, drainage and stonnwater quality.
4. We understand that an amendment to the approved RiverBend MasterPlan is not
required to accommodate the interim improvements proposed. Are there any other
permits, land use approvals, or processes needed to accommodate this project (e.g., Public
Improvement Plans), and if so, what specifically are the processes, costs and timelines that
would be required?
The temporary roadway (Si Josephs PlacelBaldy View) within the ROW will need to be
constructed as a Public Improvement Project. This can be.an amendment to an existing PIP in
progress. The city would prefer this be done as PIP to ensure that any construction within city
owned property (ROW in this case) is to city standards as the city can be held responsible for
future maintenance needs.
Date Received: 1.tJ.i/~L.
Planner: AL I '