2008 - 2017 Capital Improvement Program

Project #8023, Northeast Interceptor Improvements

Description:

The Northeast Interceptor System Improvements Project will provide additional capacity to the northeast metropolitan service area. This service area can be described as all areas tributary to the Metropolitan WWTP through the Forest Lake (70-29), White Bear Township (69-01), Vadnais Heights (VH- 422), Little Canada (71-32) & LC-421, Gervais Lake (81-51), Upper Beltline (71-22), Middle (85-66-370) and Lower (77-05) Beltline interceptors. The Northeast Interceptor System extends north to the developing communities of Forest Lake, Hugo, Centerville, Lino Lakes, White Bear Township, White Bear Lake, and North Oaks.

Project Map

The project includes facility planning for the entire system along with anticipated design and construction of improvements to improve capacity and permit continued development. Projects defined to date include: a peak flow pump station in White Bear Township; a forcemain to divert flow from a capacity restricted area of the MSB 69-01 interceptor in White Bear Township to the Upper Beltline (71-22) in White Bear Lake; a parallel interceptor to improve capacity south of lift station L3 in White Bear Township; and improvements to lift stations L1, L2, and L3. A new express relief interceptor is needed to supplement the capacity of the Upper (71-22) and Middle (85-66-370) Beltline interceptors in Maplewood and St. Paul to meet future service needs. Also included in the project are improvements to Lift Stations L5, L6, and L7 and associated pipelines, Interceptor 1-WL-417, and an extension to Lino Lakes.

Purpose and Justification:

Accelerated plans for growth in the developing communities (primarily Forest Lake, Hugo, Centerville, Lino Lakes, and White Bear Township) as well as infill development from all tributary communities is anticipated to exceed the capacity of the Northeast Interceptor System. The capacity issues involve the entire northeast corridor; and is influenced by growth as well as significant inflow and infiltration. The peak flow pumping station will convey flow by forcemain from the Forest Lake Interceptor (MSB 7029) to the Beltline Interceptor (MSB 7122). The expedited facility construction is required to reduce the risk of a future spill to Bald Eagle Lake. The peak flow pumping station is expected to be operational by September 2007.

The Lino Lakes Extension project provides for construction of approximately 5,000 feet of gravity interceptor sewer and appurtenances to be located within County Road No. 8 right-of-way in the City of Hugo. The work will be performed in conjunction with County roadway improvements. This will allow for efficient utilization of public funds and minimize construction cost, project duration, and traffic disruption to the public.

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Project Authorization:

	Project Schedule		Authorizations
	Start	End	Funding	Status
Prelim. Engr.	Jan-03	Dec-08	$3,250,000	Approved*
Design	Mar-04	Dec-09	$5,550,000	Approved*
Construction	Jan-06	Dec-15	$79,200,000	Approved*
Prior Authorization:			$27,000,000
2008 Budget Adjustment:			$0
Total 2008 Authorization:			$27,000,000
Future Authorizations:			$61,000,000
Total Project Cost:			$88,000,000
* Approved funding includes all preliminary engineering; design of MSB 6901 and Belt Lines; and the construction of the peak flow pumping station, Interceptor 1-WL-417, and the Lino Lakes Extension. Easement costs are included under design.

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Projected Cash Flow:

	Authorized	Future	Total
Prior to 2008	$20,266,000	$0	$20,266,000
2008 Budget	1,000,000	0	1,000,000
2009	1,000,000	0	1,000,000
2010	4,000,000	1,000,000	5,000,000
2011	0	15,000,000	15,000,000
2012	0	20,000,000	20,000,000
2013	0	15,000,000	15,000,000
2014	0	5,000,000	5,000,000
2015	0	5,000,000	5,000,000
2016	0	0	0
2017	0	0	0
Post-2017	0	0	0
Contingency	734,000	0	734,000
Totals	$27,000,000	$61,000,000	$88,000,000

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Impact on O&M Costs:

Inclusion of lift stations in preferred alternative would impact annual operations and maintenance budget.

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Metropolitan Council

2008 - 2017 Capital Improvement Program