Carver Cty Development Access Review Comments 12-28-18 Carver County
Public Works
I. V. 11360 Highway 212, Suite 1
Cologne,MN 55322
December 28, 2018
City of Chanhassen,
c/o Paul Oehme, P.E.
Public Works Director/City Engineer
952-227-1169
poehme@)ci.chanhassen.mn.us
Re: Development / Access Review Comments: Nelson Property Preliminary Plat on CR
117/Galpin Blvd.
Thank you for the opportunity to review the subject development in the City of Chanhassen. Consistent
with the County Comprehensive Plan and County Codes, the following are comments and recommended
conditions of approval and as potential requirements for any necessary permits to be issued for the
project:
1. The subject plat and development has been reviewed against several other major planning
and infrastructure projects, with the result that several changes and/or cross-checks of the
subject plat will be required. CR 117/Galpin Blvd. is planned as turn back project and studied
as part of a Highway 117 Corridor Study. Galpin Blvd is also identified in the County's
Comprehensive Plan as an Urban/Urbanizing Collector, with a guided access spacing of 1/4-
mile full access and 1/8-mile secondary access. In addition, a draft master stormwater and
pond management was developed, based on planned development and road design
elements.
2. In terms of access management, the proposed accesses across from Hunter Dr. and
Longacres Dr. meet the guideline for full access. These two access points are also identified
in the Highway 117 Corridor Study for full access.
3. In terms of access management, the access across from Wynsong Ln. meets the 1/8 spacing
guideline for a secondary access. Note that this access could be restricted to a right-in/right-
out access in the future. As such, it is recommended the City and developer consider a local
through road connection instead of the proposed cul-de-sac. As a condition of the secondary
access across from Wynsong Ln, the driveway from parcel no. 250100400 will need to be
removed from CR 117/Galpin Blvd. and connect to the proposed new local road.
4. Exclusive left turn and right turn lanes should be required at all full access points across from
Hunter Dr. and Longacres Dr., and if full access allowed at Wynsong Ln. Left turn lanes are
preferred over right turn lanes if space is a premium. These are shown conceptually in the
preferred alternative from the Highway 117 Corridor Study. The Hunter Drive location looks
like it will need additional right of way and / or special design transitions to the south to fit
the recommended turn lane lengths and transition tapers.
Office (952) 466-5200 I Fax (952) 466-5223 I www.co.carver.mn.us
5. Right of way dedication will be required along the east side of CR 117/Galpin Blvd. per the
above considerations, the Highway 117 Corridor Study, and the typical roadway sections
identified in the County's Draft 2040 Comprehensive Plan. The Corridor Study identifies
specific right of way needs and the plat will need to follow and be consistent with the
preferred roadway alternative. The right of way will need to tie into the existing highway
right of way north and south of the proposed development. The preliminary and final
proposal will need to be reviewed and approved as to form and content by the County
Surveyor.
Specifically, given that most all of the existing corridor is platted at approximately 100-ft total
now, this new plat's right of way could also be a total of 100 ft total or 50-ft on center. The
typical roadway section for a 2-lane urban undivided with continuous left turn lane
(intersection) should be followed and revised to fit in the 100-ft right of way planned, with an
exact cross-section to be reviewed and approved by the County and City.
The recommended cross-section could run as follows from west to east: 1'-offset; 8'-trail-5'-
blvd; 2'-gutter; 4'-bike lane; 12'-right turn lane; 12'-thru lane; 12'-left turn lane; 12'-thru
lane; 12'-right turn lane; 4'-bike lane; 2'-gutter; 5'-blvd; 8'-trail; 1'-offset (with variations in
offset and/or blvd). Potentially, the right turn lanes could be shared Thru/Right Turn Lanes
as exclusive left turn lanes are preferred over right turn lanes if space is a premium.
It could be that the left turn lane or center left turn lane could be left out of the section
where Pond "C" Wetland is existing to keep the road narrower in this section. From the
Corridor Study centerline stationing reference numbers, it looks like the typical left turn lane
is about 600-800-feet long, such that the LT lane at Hunter Drive falls at Sta 32+00 to Sta
40+00; and the LT lane at Longacres Dr falls at Sta 40+00 to Sta 48+00; and so on to the
north. More exact design layouts can verify some of these details.
6. The technical details of the plat, its boundaries and form(s) will need to be reviewed and
approved by the County Surveyor.
7. The plat's final grading plans, ponds, and right of way along CR 117/Galpin Blvd. will need to
be reviewed and approved to show how this is set up for the potential future CR 117/Galpin
Blvd. reconstruction. A cross reference of grading plans, profiles, and respective cross
sections should be provided at key locations such as intersections, ponds, or other special
features.
8. A new a draft master stormwater and pond management will need to be developed for this
plat and area, based on planned development, road design elements, and the draft ponds
planned from the Corridor Study Storm Drainage Plan. Ponds "D", "C", and potentially "B"
will need to be verified accordingly.
9. Prior to any work affecting or on County highways or in County right of way, the applicant
shall coordinate plans with the County Engineer and obtain a Utility or
Excavating/Filling/Grading Permit(s) from Carver County Public Works:
(http://www.co.carver.mn.us/how-do-i/apply-for/a-permit). Final details of locations, grades,
and profiles affecting County roads as well as any utility connections will need to be reviewed
and approved prior to any permits.
2I
10. Any damages, modifications, or changes incurred on County highways from current or
approved conditions will need to remedied or updated at development expense, including
costs incurred by the County.
These are comments at this time. If you have any questions or need further assistance, please do not
hesitate to contact me at dmccormickPco.carver.mn.us or by phone at (952) 466-5208.
Sincerely,
r-7 )•.11%1VCIMAjt
Dan McCormick, P.E. PTOE
Transportation Manager
Carver County Public Works
3 H .