2d Dogwood-Tanadoona Improvement Project : Approve Consultant Contract
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.227.1110
Building Inspections
Phone: 952.227.1180
Fax: 952,227.1190
Engineering
Phone: 952.227.1160
Fax: 952.227,1170
Finance
Phone: 952.227.1140
Fax: 952.227,1110
Park & Recreation
Phone: 952.227.1120
Fax: 952,227.1110
Recreation Center
2310 Coulter Boulevard
Phone: 952.227.1400
Fax: 952.227.1404
Planning &
Natural Resources
Phone: 952.227.1130
Fax: 952.227.1110
Public Works
1591 Park Road
Phone: 952.227.1300
Fax: 952.227.1310
Senior Center
Phone: 952.227.1125
Fax: 952.227,1110
Web Site
WWVI, ci .chanhassen.mn. us
02-ct,
-
:MEMORANDUM
TO:
?c7(
FROM:
Paul Oehme, Director of Public Works/City Engineer
Alyson Fauske, Assistant City Engineer rt..1->f ~
~~Y .
June 11,2007 '
DATE:'
SUBJ:
Dogwood/Tanadoona Improvement Project No. 07-01: Approve
Consultant Contract for Additional Services
REQUESTED ACTION
Approve Consultant Contract for additional services with Kimley-Horn &
Associates in the amount of $51,200.
BACKGROUND
As part of the final design for this project, several additional services were
necessary to complete the project. The following are additional services that
Kimley-Horn provided during final design that were not in the original contract:
Dogwood Alternative Alignment Design
· Develop preliminary alignment and profile for alternative roadway
alignment for Dogwood Road based on property owner feedback.
. Cut cross sections and develop construction limits for alternative
alignment.
· Perform preliminary design on private driveway extensions including
alignments, profiles and earthwork calculations.
. Determine additional impacts to existing trees.
. Determine additional right-of-way required for the alternative
alignment.
. Calculate earthwork and quantities for alternative alignment.
. Prepare preliminary cost estimate for the alternative alignment.
· Prepare exhibits for City staff to facilitate discussions with property
owners regarding the alternative roadway alignment.
Additional Financing Summary Analysis
. Prepare four (4) different cost estimates for each of the following
improvements to reflect variations in design: Dogwood Road
Improvements, Tanadoona Drive Improvements, Sanitary Sewer
Improvements, Watermain Improvements, and Storm Sewer
Improvements.
. Prepare four (4) versions of the assessment roll to reflect different
The City of Chanhassen · A growing community with cle~1~~~~ua?rm~g~~a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play.
DogwoodJTanadoona Improvement Project
June 11, 2007
Page 2
· Perform two additional updates to the assessment rolls based on changes to the
assessment methodology.
Storm Water Pond Design
. Explore feasibility of construction of a storm water pond at the northwest corner of
Dogwood Road and Tanadoona Drive.
. Perform preliminary design of a storm water pond based on GIS contours provided by
the City.
. Determine easement requirements and prepare exhibit for City staff to facilitate
discussions with the property owner.
. Prepare legal description for drainage easement.
. Perform topographic survey and mapping for storm water pond area.
. Perform final design of storm water pond based on survey mapping.
· Determine wetland impacts from proposed storm water pond construction.
· Coordinate with City staff in preparing wetland banking application for project.
Starks Berm Design
. Explore feasibility of constructing a berm on the south side of Tanadoona Drive
adjacent to the Starks property.
. Provide exhibits to City staff to facilitate discussions with property owner regarding
berm construction.
. Prepare final design of berm including cross sections and earthwork calculations.
Additional Final Design Work
· Coordinate with City staff and product vendor on the design of an environmental
manhole for the project.
· Explore option of directional drilling the sanitary sewer and watermain on the project.
Meet with contractors to discuss the feasibility of directional drilling sewer.
Additional Soil Boring Investigation
· Perform deeper soil borings as necessary to accommodate extra depth in sanitary
sewer and proposed sanitary sewer lift station. This cost was past through to Kimley-
Horn by the soils investigation consultant.
Additional Meetings
. Attend two (2) additional meetings with City staff and the private developer.
Staff has reviewed these costs and finds them acceptable based on the work performed and the
time submitted for the service provided.
Funding for the additional services were included in the project cost and will be funded through
assessments, the revolving assessment fund, and the storm sewer utility fund based on the City's
assessment practice.
c: Chadd Larson, Kimley-Horn & Associates