2011 - 2016 Capital Improvement Program

Project #8063, SWC Interceptor - Lake Elmo Connections  

Description:

This project provides regional interceptors to convey wastewater from Lake Elmo. This project was originally included as part of the South Washington County Interceptor project. It includes two new connections to Lake Elmo. The Lake Elmo East Connection will provide 1.7 MGD of average daily capacity to eastern Lake Elmo. A gravity interceptor sewer would start at I-94 and proceed about 0.4 miles south along Cottage Grove Drive to a new regional lift station to be built in Woodbury. Initially this flow will be temporarily routed through Woodbury trunk sewers. Eventually the flow will be diverted into the planned Northeast Leg of the South Washington County Interceptor. In both cases the flow will be conveyed to the Eagles Point Plant in Cottage Grove via the portion of South Washington County Interceptor along County Road 19 south of Lake Road, which was completed in 2005.

The first phase of a second, new connection for Lake Elmo, entitled Lake Elmo Forcemain to WONE, was constructed in 2005 under the Small Systemwide Improvements Program (SSIP). The remainder of the project is being constructed under this project. This new connection will provide 0.5 MGD of average daily capacity to southwestern Lake Elmo. The existing 3,600 feet of 12-inch forcemain along Radio Drive will be extended to Lake Elmo by construction of about 3,500 feet of new 12-inch forcemain terminating at the existing Lake Elmo lift station located east of Inwood Avenue. Also, 4,600 feet of the existing 16-inch Woodbury Wilmes Lake Forcemain to the WONE Interceptor need to be acquired from Woodbury, inspected and rehabilitated as necessary. This wastewater will flow to the Metropolitan Treatment Plant via the MCES' WONE (1-WO-500) Interceptor.

Purpose and Justification:

This project will provide interceptor facilities to convey wastewater from portions of Lake Elmo and northeast Woodbury to the regional plant in Cottage Grove. The project is needed to support growth in this eastern portion of the metropolitan area.

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Project Authorization:

Project Schedule

Authorizations

Start

End

Funding

Status

Prelim. Engr.

Jan-06 Dec -06

$180,000

Approved

Design

Jan-05 Dec-07

$2,820,000

Approved

Construction

Mar-07 Dec-13

$14,500,000

Approved

Prior Authorization:

$17,500,000

2011 Budget Adjustment:

$0

Total 2011 Authorization:

$17,500,000

Future Authorizations:

$10,000,000

Total Project Cost:

$27,500,000

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   Projected Cash Flow:

Authorized

Future

Total

Prior to 2011
$8,386,000
$0
$8,386,000
2011 Budget
700,000
0
700,000
2012
3,000,000
0
3,000,000
2013
2,000,000
0
2,000,000
2014
0
0
0
2015
0
0
0
2016
0
0
0
2017 - 2021
2,000,000
10,000,000
12,000,000
2022 - 2026
0
0
0
Contingency
1,414,000
0
1,414,000
Totals
$17,500,000
$10,000,000
$27,500,000

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Impact on O&M Costs:

Will increase O&M costs by approximately $15,000 annually due to new interceptor systems and another $70,000 annually when the Woodbury Northeast Lift Station is added.

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