Bolton and Menk Engineers and Surveyors : Empire Township

City Of Eagle Lake

Comprehensive Infrastructure Planning Study City of Eagle Lake March 2006 Prepared By
Table of Contents - click on the underlined links to view report sections and figures.
Section 1 - Introduction and Growth Projections
1.0 Purpose of Report	1
2.0 Scope of Study	3
3.0 Report Organization	4
4.0 Population Projections	4
5.0 Household Projections	6
6.0 Development Projections	9
FIGURES
Figure 1.0: Land Use Plan	3
Figure 2.1: Land Use Assumptions	3
Figure 4.1: Comparison of Population Change by % (Fig. in report text)	5
Figure 4.2: Population Projection (Fig. in report text)	6
Figure 5.1: Household Projections Based Upon Population Projection (Fig. in report text)	8
Figure 6.1: Existing and future Developments	9
TABLES
Table 4.1: Population Change - 1970 to 2000	4
Table 5.1: Household & Housing Unit Change	7
Table 6.1: Existing and Future Developments	9
Table 6.2: Estimated Ultimate Population Based on Land Use Plan	10
Section 2 - Transportation Plan
1.0 Purpose of the Transportation Plan	1
2.0 Transportation System Principles and Standards	1
2.1 Functional Classification	1
2.2 Access Management Guidelines	4
2.3 Geometric Design Standards - Major Collector and Minor Collector	8
2.4 Roadway Jurisdiction	10
3.0 Existing Transportation System	11
3.1 Traffic Volumes 11
3.2 Existing Street Widths	12
3.3 Continuity Deficiencies	12
3.4 Development Areas	13
3.5 Jurisdictional Issues	13
3.6 Relevant Area Transportation Studies	13
3.6.1 Mankato/North Mankato Area Transportation and Planning Study	13
3.6.2 U. S. 14 Access Management Study	14
4.0 Future Transportation System	14
4.1 Future Roadway Corridors	14
4.2 Traffic Control Devices	17
4.2.1 Regulatory Signs	18
4.2.2 Warning Signs	19
4.2.3 Guide Signs	20
5.0 Recommendations Future Studies	20
FIGURES
Figure 1.1: Location Map	1
Figure 2.1: Existing Roadway - Functional Classification	2
Figure 2.2: Geometric Design Standards for Major Collectors	8
Figure 2.3: Geometric Design Standards for Local Collectors	8
Figure 2.4: Geometric Design Standards for Minor Arterial Roadways	10
Figure 2.5: Geometric Design Standards for Minor Arterial Roadways	10
Figure 3.1: Existing Transportation System	11
Figure 3.2: Eagle Lake and Surrounding Area: Traffic Counts	11
Figure 3.3: Traffic Volume	12
Figure 3.4: Existing Street Widths	12
Figure 3.5: Comprehensive Infrastructure Plan, Existing and Future Developments	13
Figure 4.1: Surrounding Area: Future Road System and Classification	15
Figure 4.2: Street Sign Inventory	17
Figure 5.0: Existing and Preliminary Proposed Sidewalks and Trails	21
TABLES
Table 2.1: Roadway Access Standards	7
Table 2.2: Access Spacing Guidelines for Collector Roadways in Eagle lake	7
Table 2.3: Roadway Design Speed Guidelines	10
Section 3 - Water System Plan
1.0 Purpose of the Water System Plan	1
2.0 Existing Water System	1
2.1 Water Supply and Treatment	1
2.2 Water Storage Facilities	2
2.3 Water Distribution Network	2
3.0 Evaluation of Existing Water System	3
3.1 Water Use	3
3.2 Water Supply	6
3.3 Water Treatment	7
3.4 Water Storage	9
3.5 Water Distribution System	11
4.0 Proposed Improvements	14
4.1 Water Supply	14
4.1.1 Alternative No. 1 - New Well and Well House	15
4.1.2 Alternative No. 2 -New Well and Expand Existing Well House	15
4.2 Water Storage	17
4.3 Water Distribution System	18
5.0 Cost Estimates for 20-yr Improvements and Financing	20
FIGURES
Figure 2.1: Existing Watermain System	2
Figure 3.1: Water Usage and Sanitary Sewer Flows (Fig. in report text)	4
Figure 3.2: Firm Well Capacity (Fig. in report text)	7
Figure 3.3: Existing Pressure	12
Figure 3.4: Existing Available Fireflow	12
Figure 4.1: Future Watermain System	18
Figure 4.2: Future Pressure	19
Figure 4.3: Future Available Fireflow	19
Figure 4.4: Future Improvements to Existing Watermain System	19
TABLES
Table 2.1: Existing Well Data	1
Table 3.1: Historical Water Use	3
Table 3.2: Projected Water Demand	5
Table 3.3: Iron and Manganese Data	8
Table 3.4: Water Storage Requirements	10
Table 3.5: Needed Fire Lows in Residential Areas	12
Table 3.6: Needed Fire Flow Assumptions	13
Table 3.7: Needed Fire Flows Durations	14
Table 4.1: Estimated Cost - New Well - Alternate No. 1	15
Table 4.2: Estimated Cost - New Well - Alternate No. 2	16
Table 5.1: Estimated Cost, 20-yr Watermain Oversizing	20
Table 5.2: Estimated Cost, 20-yr Improvements
APPENDIX
Hydrant Flow Test Data, WaterCAD Output
Section 4 - Wastewater System Plan
1.0 Purpose of the Wastewater Plan	1
2.0 Existing Wastewater System	1
2.1 Existing Wastewater Districts	1
3.0 Design Considerations for Wastewater Collection Systems	4
3.1 Existing Wastewater Flows	4
3.2 Projected Wastewater Flows	6
3.3 Pipe Depth and Capacity	9
3.4 Lift Stations	10
4.0 Evaluation of Existing Wastewater System	11
5.0 Proposed Wastewater Collection System Improvements	12
5.1 20-year Growth Area Improvements	12
5.2 Ultimate Growth Area Improvements	13
6.0 Cost Estimates for 20-year Improvements and Financing	17
FIGURES
Figure 2.1: Existing Sanitary Sewer System	1
Figure 2.2: Existing Sanitary Sewer Districts	1
Figure 2.3: Existing Lift Station Service Areas	1
Figure 3.1: Water Usage and Sanitary Sewer Flows (Fig. in report text)	4
Figure 4.1: Existing Sanitary Sewer Capacity	11
Figure 5.1: Future Trunk Sewers	13
Figure 5.2: Future Interceptor Sewer Improvements	14
Figure 5.3: Future Sanitary Sewer Capacity	15
Figure 5.4: Future Lift Station Service Areas	17
TABLES
Table 3.1: Project Wastewater Flows	5
Table 3.2: Housing Density Assumptions for Wastewater Flow Calculations	6
Table 3.3: Factors for Commercial & Industrial Wastewater Flow Calculations	7
Table 3.4: Peaking Factors Used for Wastewater Flows	8
Table 3.5: Projected Wastewater Flows	9
Table 3.6: Minimum Requirements for Design	10
Table 4.1: Existing Lift Station Configurations and Capacities	12
Table 5.1: Estimated Future Development Capacities for Current Interceptor System	15
Table 5.2: Maximum Lift Station Capacities and Corresponding Development	16
APPENDIX
SewerCAD Output
Section 5 - Stormwater Management Plan
1.0 Project Introduction	1
2.0 Summary Of Goals	2
2.1 Water Quality	2
2.2 Runoff Management And Flood Control	2
2.3 Wetlands	3
2.4 Erosion And Sediment Control	3
2.5 Groundwater	3
2.6 Recreation And Habitat Management	3
2.7 Education And Public Involvement	3
2.8 Financing	3
3.0 Modeling Methodology And Mapping	4
3.1 Hydrological Methodology	4
3.2 General Procedures	6
3.3 Gis Mapping	8
4.0 Hydrologic Parameters	9
4.1 Topography	9
4.1.1 East Watershed	9
4.1.2 North Watershed	10
4.1.3 West Central Watershed	10
4.1.4 Southwest Watershed	10
4.1.5 South Watershed	11
4.2 Soils	11
4.3 Land Use	12
5.0 Watershed Assessment And Recommended Solutions	13
5.1 Runoff Pollution Prevention Best Management Practices (Bmp's)	13
5.1.1 Pavement Management	13
5.1.2 Bmp Maintenance	13
5.1.3 Animal Management	13
5.2 Regional Ponding	14
5.3 Watershed Specific Assessment And Recommendations	15
5.3.1 Existing System	15
5.3.2 East Watershed (E)	16
5.3.3 North Watershed (N)	17
5.3.4 West Central Watershed (W)	17
5.3.5 Southwest Watershed (Sw)	18
5.3.6 South Watershed (S)	19
6.0 Recommended Ordinances And Policies	20
6.1 Recommended Ordinances	20
6.2 General Recommendations	22
6.3 Recommended Citywide Policy	24
7.0 Costs And Funding	25
7.1 Costs	25
7.2 Funding	26
7.2.1 Storm Water Development Charge	26
7.2.2 Storm Water Utility	28
8.0 Conclusion	31
TABLES
Table 5.1: Rainfall depths per Recurrence Interval	6
Table 5.2: Recommended SCS Runoff Curve Numbers (CN)	20
Table 5.3: Projected Regional Pond Costs	27
FIGURES
Figure 5.1: Watershed Map-Outer Growth Area (Aerial)
Figure 5.2: Watershed Map-Outer Growth Area (Topo)
Figure 5.3: Watershed Map-Inner Growth Area (Aerial)
Figure 5.4: Watershed Map-Inner Growth Area (Topo)
Figure 5.5: Drainage Area Map (Aerial)
Figure 5.6: Drainage Area Map (Topo)
Figure 5.7: Proposed Ponding Improvements Map
Figure 5.8: Soil Classification Map
Figure 5.9: Hydrologic Soil Classification Map
Figure 5.10: National Wetlands Inventory Map
Figure 5.11: 100yr Highwater Elev. for Drainageways
Figure 5.12: Land Use Map
Figure 5.13: Current Storm Sewer System Map
Figure 5.14: County Ditches within Growth Area
Figure 5.15: Bysected Detention Pond Exhibit

City of Eagle Lake
Comprehensive Infrastructure Planning Study
March 2006

I hereby certify that this report, with the exception of the transportation plan and stormwater management plan sections, was prepared by me or under my direct supervision, and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota.
Signature:                                              Typed or Printed Name:                      Brian P. Malm, P.E.
Date:                                                       License No:                                                              40457
I hereby certify that the transportation plan section of this report was prepared by me or under my direct supervision, and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota.
Signature:                                              Typed or Printed Name: Christopher S. Chromy, P.E., P.T.O.E.
Date:                                                       License No:                                                              26512
I hereby certify that the stormwater management plan section of this report was prepared by me or under my direct supervision, and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota.
Signature:                                              Typed or Printed Name:                      Ryan J. Barney, P.E.
Date:                                                       License No:                                                              43073
This plan was prepared with the assistance of and in coordination with:
Brad Potter, Eagle Lake City Administrator
Rick Reinbold, Eagle Lake Public Works Director
Alan Forsberg, P.E., Blue Earth County Engineer