1c Longacres Drainage Impr & Lyman Blvd Sewer Repairs
CITY OF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen, MN 55317
Administration
Phone: 952.227.1100
Fax: 952.2271110
Building Inspections
Phone: 952.227.11BO
Fax: 952.2271190
Engineering
Phone: 952.2271160
Fax: 952.227.1170
Finance
Phone: 952.2271140
Fax: 952.2271110
Park & Recreation
Phone: 952.2271120
Fax: 952.2271110
Recreation Center
2310 Coulter Boulevard
Phone: 952.2271400
Fax: 952.2271404
Planning &
Natural Resources
Phone: 952.2271130
Fax: 952.227.1110
Public Works
1591 Park Road
Phone: 952.2271300
Fax: 952.2271310
Senior Center
Phone: 952.2271125
Fax: 952.2271110
Web Site
'INNI.ci.chanhassen.mn.us
i~
MEMORANDUM
TO:
Todd Gerhardt, City Manager CJ .
Paul Oehme, City Engineer/Dir. of Public Works ..<tv /ft
(J~,":"
April 10,2006
FROM:
DATE:
SUBl:
Longacres Neighborhood Drainage Improvements & Lyman Boulevard
Sanitary Sewer Repairs - Project Nos. 06-09 & 06-08
BACKGROUND
Longacres Neighborhood Drainage Improvements
On September 4 and 5,2005, Chanhassen experienced nearly a 100-year rainfall event.
The storm event caused drainage and erosion problems in many parts of the city. Newly
graded developments were particularly susceptible to erosion and drainage problems. In
the case of Highcrest Meadows, the final grading was not complete, the site was not
stabilized to withstand the extreme rainfall and the stormwater infrastructure had not been
installed. The volume of runoff and accompanying debris and sediment caused damage
to a number of existing homes. It also alerted the City to an existing condition in the
Longacres neighborhood that intensified the effects of the rain event.
If the development would have been finished and the storm sewer system functioning,
impacts to the existing property owners most likely would not have taken place.
However, due to the amount of runoff and debris that entered the City storm sewer
system from the development, the storm sewer system became clogged and backed up.
Normally, when storm systems backup or become clogged, an emergency overflow
(EOF) system should take the runoff and channel it over land away from structures to
minimize the amount of property damage. At this particular location, an EOF was
designed to flow over Longacres Drive but the road was built approximately 1.5' higher
than planned and therefore restricted the overflow from the pond. Also, the properties on
the south side of Longacres Drive where the EOF was designed to flow between two
properties was not graded to building plan and also restricted the overflow water from the
pond.
The developer of Highcrest Meadows (Coffman Development, Inc.) and the City have
been working together with the affected Longacres residents to identify and devise a
solution as a result of the Labor Day weekend storm. The attached drawing shows the
most feasible fix of the problem. It involves the installation of an EOF storm sewer pipe
from the pond.
Lvman Boulevard Sanitary Sewer Improvement
On December 16,2005, a sewer backup occurred in the Summerfield development. The
sewer backup was immediately cleared and the sewer pipe was cleaned by City staff. In
researching why the sewer backed up, it was determined that a segment of sewer pipe
The City 01 Chanhassen · A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play.
Todd Gerhardt
April 10, 2006
Page 2
under Lyman Boulevard has settled and caused the sewage to backup. The area of
settlement is adjacent to a wetland complex and it is speculated that poor soils under the
pipe have settled.
The sanitary sewer pipe can no longer be maintained or be relied on for proper sewer
flow. It is recommended that the sewer pipe be replaced and any poor soils under the
sewer pipe be removed and replaced with the necessary pipe bedding material.
DISCUSSION
In order to fix both of these system problems, plans for projects will need to be drafted,
the projects bid out and the projects constructed with proper oversight. Staff does not
have the expertise to complete the project so a consultant would need to be hired.
Staff solicited price proposals from a few consultants for these improvements. The
proposals were due back on March 17, 2006 and the fees are as follows:
Longacres Drive Pond Imp.
Lyman Boulevard Sanitary Sewer Imp.
TOT ALS
Bolton &
Menk, Inc.
$20,610.00
$16,100.00
$36,710.00
Bonestroo
& Assoc.
$24,459.00
$5,472.00
$29,931.00*
HTPO
$23,000.00
$8,000.00
$31,000.00
*Low Proposal
FUNDING
The Longacres Drive Pond Improvements are proposed to be funded through the Surface
Water Management Fund (Fund 720). Since this is a retrofit project, it is proposed to be
paid for out of the operating budget, not the Capital Improvement Program. The 2006
budget for the Surface Water Management Fund allocates $600,000 to fees for services.
The Lyman Boulevard sanitary sewer improvements are proposed to be funded through
the Sewer Operations budget. Since this is not a planned capital improvement, funding
for the design and construction administration services are proposed to come out of the
annual fees for Service budget. The construction cost is proposed to come out of the
sewer repair maintenance budget.
RECOMMENDA TION
Staff recommends awarding a contract to Bonestroo & Associates for the Longacres
Storm Sewer and Lyman Boulevard Sanitary Sewer Improvements work.
Attachments: 1.
2.
3.
Budget Pages
Longacres Drainage Improvement Map
Lyman Boulevard Sanitary Sewer Improvements Map
G:\ENGIPAULIMEMOSlbkgd 041006longacres Iyman blvd consnltant contract award 06-08 06-09.doc
CITY OF CHANHASSEN
2006 BUDGET
ENTERPRISE FUNDS
Sewer 0 erations
2004 2005 2006
ACCOUNT DESCRIPTION ACTUAL BUDGET BUDGET
4010 Salaries & Wages-Reg $184,432 $237,000 " $247,500 4.4%
4011 Overtime-Reg 8,947 9,500 15,000 57.9%
4012 Stand-By Pay 5,877 6,000 6,000 0.0%
4020 Salaries & Wages-Temp 9,546. 9,600 11,000 14.6%
4030 Contributions-Retirement 25,500 31,300 33,800 8.0%
4040 Contributions-Insurance 31,510 32,700 37,200 13.8%
4050 Workers Compensation 4,705 4,300 4,800 11.6%
* TOTAL PERSONAL SERVICES 270,517 330,400 355,300 7.5%
4120 Supplies-Equipment 4,901 6,750 6,800 0.7%
4130 Supplies-Program 500 500 0.0%
4140 Supplies-VehiGles 4,900 6,000 6,000 0.0%
4150 Maintenance Materials 3,850 5,000 10,000 100.0%
4160 Chemicals 768 1,000 1,000 0.0%
4170 Motor Fuels & Lubricants 6,500 6,500 0.0%
4210 Books & Periodicals 250 250 0.0%
4240 Uniforms & Clothing 1,952 1 ,400 1 ,400 0.0%
4260 Small Tools & Equipment 1,667 750 1,000 33.3%
* TOTAL MATERIALS & SUPPLIES 18,038 28,150 33,450 18.8%
~300 Fees, Services (12,950) 24,000 26,500 10.4%
4301 Auditing 11,175 4,000 6,000 50.0%
4310 Telephone 5,428 10,000 10,000 0.0%
4320 Utilities 35,006 85,000 85,000 0.0%
4330 Postage 4,348 5,000 8,000 60.0%
4340 Printing & Publishing 2,353 6,500 6r5OO 0.0%
4350 Cleaning & Waste Removal 49 50 250 400.0%
4360 Subscriptions & Memberships 300 400 33.3%
4370 Travel & Training 2,270 3,000 3,500 16.7%
4410 Rental~Equipment 254 500 1,500 200.0%
4440 License & Registration 125 250 250 0.0%
4483 Insurance-General Liability 12,960 8,250 13,000 57.6%
.4509 Remit to Other Agencies 1,203,666 1,250,000 1,385,000 10.8%
4510 Repair & Maintenance-Building 1,413 1,500 1,700 13.3%
4520 Repair & Maintenance-Vehicles 2,842 1,250 1,600 28.Q%
4530 Repair & Maintenance-~!Jlp 7,699 27,500. 28,000 1.8%
4531 Repair & Maintenance-Radios 400 100 (75.0%)
.. 4550 Repair & Maintenance-Water. 137 0.0%
4551 Repair & Mai~er 49,347 75,000 75,000 0.0%
4553 Emergency Sewer RepaIrs 32,237 10,000 40,000 300.0%
* TOTAL CONTRACTUAL SERVICES 1,358,359 1,512,500 1 ,692,300 11.9%
** TOTAL SEWER OPERATIONS 1,646,914 1,871,050 2,081,050
80
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I CITY OF CHANHASSEN
2006 BUDGET
I ENTERPRISE FUNDS I
I
720 Surface Water Management Fund
2005 to I
2004 2005 2006 2006
ACCOUNT DESCRIPTION ACTUAL BUDGET BUDGET % INC/(DEC) I
EXPENDITURES
PERSONAL SERVICES
4010 Salaries & Wages-Reg $74,811 $119,000 $122,100 2.6%
4020 Salaries & Wages-Temp 14,810 15,000 100.0%
4030 Contributions-Retirement 10,951 15,700 16,700 6.4%
4040 Contributions-Insurance 7,515 17,600 13,300 (24.4%)
4050 Workers Compensation 605 900 900 0.0%
4060 Unemployment 269 0.0%
* TOTAL PERSONAL SERVICES $108,961 $153,200 $. 168,000 9.7%
MATERIALS & SUPPLIES
4120 Supplies-Equipment 23,805 500 500 0.0%
4130 Supplies-Program 1 ,431 1,000 1,500 50.0%
4150 Maintenance Materials 218 1,000 1,000 0.0%
4210 Books & Periodicals 12 200 200 0.0%
4240 Uniforms & Clothing 67 0.0%
* TOTAL MATERIALS & SUPPLIES 25,533 2,700 3,200 18.5%
iNTRACTUAL SERVICES
4300 Fees, Services 132,358 820,000 600,000 (26.8%)
4301 Fees, Financial/Audit 7,550 1,500 8,000 433.3%
4340 Printing & Publishing 2,279 6,000 6,000 0.0%
4360 Subscriptions & Memberships 193 500 3,000 500.0%
4370 Travel & Training 809 4,500 4,500 0.0%
4380 Mileage 199 500 500 0.0%
4410 Rental-Equipment 5,000 5,000 0.0%
* TOTAL CONTRACTUAL SERVICES 143,388 838,000 627,000 (25.2%)
CAPITAL OUTLAY
4701. Land, Purchase & Improv. 300,000 300,000 0.0%
* TOTAL CAPITAL OUTLAY 300,000 300,000 0.0%
** TOTAL EXPENDITURES 277 ,882 1,293,900 1,098,200 (15.1%)
84
+
Longacres Area Ponds Emergency
Outlet Improvement
;
~ Proposed Emergency Storm Sewer Outlet Pipe
/'\/' City Bike Trail ~ Existing Storm Sewer Pipe
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