3. High Zone Water Storage: Approve Consultant Contract0
CI9'II 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
MEMORANDUM
TO
Todd Gerhardt, City Manager
<1,
UT 615"
Paul Oehme, Director of Public Works /City Engineer
DATE: June 13, 2011
SO
SUBJ: High Zone Water Storage, Project #11 -05: Approve Consultant
Contract
PROPOSED MOTION
"The City Council approves a contract for design and construction administration
services in the amount of $141,920 to Short Elliott Henderson, Inc. (SEH)"
City Council approval requires a simple majority vote of the City Council present.
BACKGROUND
In November 2008, the City completed an update to the Comprehensive Water
Plan. As part of the plan, a storage analysis was performed that recommended
additional storage be constructed in the existing high service zone. The high zone
water area has seen significant growth in recent years, which has driven the need
for additional storage capacity.
Fax: 952.227.1404
On May 19, 2011, staff discussed water storage needs in the high zone with the
Planning &
Minnetonka School District and presented a proposal to the board to construct a new
Natural Resources
water storage tower in the southwest corner of the Minnetonka Middle School West
Phone: 952.227.1130
campus.
Fax: 952.227.1110
On May 23, 2011, staff presented a water storage needs analysis in the high zone to
Public Works
the City Council at the worksession.
7901 Park Place
Phone: 952.227.1300
Fax: 952.227.1310
On June 8, 2011, staff held a neighborhood meeting to discuss the proposed water
tower at the southwest corner of the Minnetonka Middle School West campus.
Senior Center
Phone: 952.227.1125
DISCUSSION
Fax: 952.227.1110
Web Site The City completed an update to the Comprehensive Water Plan in 2008. As part
www.ci.chanhassen.mn.us of the plan, a storage analysis was performed that recommended additional
storage be constructed in the existing high service zone. The high zone water area
has seen significant growth in recent years, which has driven the need for
additional storage capacity.
Chanhassen is a Community for Life - Providing for Today and Planning for Tomorrow
Todd Gerhardt
High Zone Water Storage Project: Approve Consultant Contract
June 13, 2011
Page 2
The City has two main pressure zones. The low zone area services about 88% of the current city
demand. Two water towers service this area along with the East Water Treatment Plant. The
high zone area is serviced by two wells and a 200,000 water tower located next to Minnetonka
Middle School West. This tower was constructed in 1971. The population of Chanhassen in
1970 was 4,875. Today the population of Chanhassen is 22,952. The high zone is mainly in a
residential service area which has seen significant growth in the past 15 years. Currently, the
demand in the high zone area can be as little as 100,000 gallons per day during the winter
months and as much as 1,800,000 during peak summertime usage (2007). The continuous
cycling puts stress on pumps and motors needed to supply the tower and is a very inefficient way
to supply water. Also, the undersized storage facility leaves little time for utility staff to respond
to power outages and start auxiliary power generation. In addition, the tank at this time is
undersized for fire flow design.
CONSULTANT SELECTION
On June 3, 2011, proposals from SEH and WSB & Associates for this project were received at the
City. The scope of work included design, bidding and construction services necessary to complete
the project. Also included in the proposal are geotechnical borings and soil and materials testing.
The proposals are summarized as follows:
Short Elliott WSB &
Henderson, Inc Associates, Inc.
Submitted prior to the deadline ✓ ✓
Proposal format ✓ ✓
Transmittal letter submitted ✓ ✓
Understanding of project ✓ ✓
Total Fee $141,920 $166,251
Short Elliott Henderson, Inc. has worked on City water projects in the past and their work has been
satisfactory.
SCHEDULE
• Authorization for Design & Approve
Agreement with Minnetonka School District
• Bidding
• Soils Correction
• Foundation and Tank Construction
• Tank Construction Substantial Completion
• Remove Melody Hill Tower
FUNDING
July, 2011
September, 2011
October, 2011
June - September, 2012
June, 2013
June, 2013 (contracted out separately)
Budgets for the proposed work have been included in the 2011 CIP.
g: \eng \public \_2011 projects \11 -03 - high zone tower project \approve consultant contrac.doc
Todd Gerhardt
High Zone Water Storage Project: Approve Consultant Contract
June 13, 2011
Page 2
The City has two main pressure zones. The low zone area services about 88% of the current city
demand. Two water towers service this area along with the East Water Treatment Plant. The
high zone area is serviced by two wells and a 200,000 water tower located next to Minnetonka
Middle School West. This tower was constructed in 1971. The population of Chanhassen in
1970 was 4,875. Today the population of Chanhassen is 22,952. The high zone is mainly in a
residential service area which has seen significant growth in the past 15 years. Currently, the
demand in the high zone area can be as little as 100,000 gallons per day during the winter
months and as much as 1,800,000 during peak summertime usage (2007). The continuous
cycling puts stress on pumps and motors needed to supply the tower and is a very inefficient way
to supply water. Also, the undersized storage facility leaves little time for utility staff to respond
to power outages and start auxiliary power generation. In addition, the tank at this time is
undersized for fire flow design.
CONSULTANT SELECTION
On June 3, 2011, proposals from SEH and WSB & Associates for this project were received at the
City. The scope of work included design, bidding and construction services necessary to complete
the project. Also included in the proposal are geotechnical borings and soil and materials testing.
The proposals are summarized as follows:
Submitted prior to the deadline
Proposal format
Transmittal letter submitted
Understanding of project
Short Elliott WSB &
Henderson, Inc Associates, Inc.
✓ ✓
✓ ✓
✓ ✓
✓ ✓
Total Fee $141,920 $166,251
Short Elliott Henderson, Inc. has worked on City water projects in the past and their work has been
satisfactory.
SCHEDULE
• Authorization for Design & Approve
Agreement with Minnetonka School District
• Bidding
• Soils Correction
• Foundation and Tank Construction
• Tank Construction Substantial Completion
• Remove Melody Hill Tower
FUNDING
July, 2011
September, 2011
October, 2011
June- September, 2012
June, 2013
June, 2013 (contracted out separately)
Budgets for the proposed work have been included in the 2011 CIP.
g: \eng \public \_2011 projects \11 -03 - high zone tower project \approve consultant contrac.doc
Capital Improvement Program 2011 art; 2015
City of Chanhassen, MN
Project W -042
Project Name Hi Zone Elevated Storage Tank.
Account #1 700 - 702511751
Account #2
Account #3
Account #4
Department Water System Improvements
Contact PaulOehme
Type Improvement
Useful Life
Category Utilities
Priority n/a
Total Project Cost: $1,900,000
ed on current and projected system demands, the high zone should have additional storage capacity. The 2008 water comprehensive plan
)rnmends a total of- 750,000 gallons for storage. Currently, the high zone only has 200,000 gallons of storage. Thelocation.of the tank has not
been determined, but a few locations were identified in the 2008 comprehensive plan. A tank siting study should be completed to identify the
tlocation.
Justification
To meet current and future water demands for the high zone area and to meet recommended fire flow storage'requirements.
Expenditures 2011 2012 2013 2014 2015 Total
Construction 1,900,000 1,900,000
Total 1,900,000 1
Funding Sources 2011 2012 2013 2014 2015 Total
Water Utility Fund 1,900,000 119W.000
Total 1,900,000 1,900,000
Budget Impact/Other
135