Detailed Survey Report Thief River Falls Flood Damage Reduction

Project and Improvem ent to Pennington

County D itch #1

(Red Lake Watershed District Ditch #14)

October 2010

Prepared by:

HDR Engineering, Inc. 324 2nd Street East Thief River Falls, Minnesota 56701 DETAILED SURVEY REPORT

THIEF RIVER FALLS FLOOD DAMAGE REDUCTION PROJECT AND IMPROVEMENT TO PENNINGTON COUNTY DITCH #1 RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT #171)

October 2010

I hereby certify that this plan, specification, or 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.

______Nathan P. Dalager, P.E.

License Number 25309

HDR Engineering, Inc. 324 Second Street East Thief River Falls, Minnesota 56701

RED LAKE WATERSHED DISTRICT TABLE OF CONTENTS

TABLE OF CONTENTS 1.0 INTRODUCTION ...... 1

1.1 PETITION ...... 3 1.2 DITCH IMPROVEMENT PROCESS ...... 4

2.0 PROJECT NEED ...... 5

2.1 PROJECT HISTORY AND PERFORMANCE ...... 5 2.2 CONCERNS AND DESIGN ISSUES ...... 6

3.0 PROJECT DESCRIPTION ...... 8

3.1 ALTERNATIVES AND OPTIONS CONSIDERED ...... 8 3.2 SURVEYS ...... 11 3.3 DATA COLLECTION ...... 11 3.4 ALIGNMENT & STATIONING ...... 11 3.5 PLANS & RIGHT‐OF‐WAY ...... 13

4.0 PROJECT DESIGN CRITERIA ...... 14

4.1 DESIGN GOALS ...... 14 4.2 DESIGN CRITERIA ...... 14 4.3 HYDROLOGY ...... 14 4.3.1 Design Storm Data ...... 15 4.3.2 Design Rainfall Distribution ...... 16 4.3.3 Subwatersheds ...... 16 4.3.4 Peak Flow Rates ...... 17 4.4 HYDRAULICS ...... 17

5.0 RESULTS & ADDITIONAL CONSIDERATIONS...... 25

5.1 IMPROVED DITCH CROSS‐SECTIONS ...... 25 5.2 IMPROVED DITCH GRADES ...... 26 5.3 CULVERT IMPROVEMENTS ...... 27 5.4 STORM SEWER IMPROVEMENTS ...... 28 5.5 UTILITIES ...... 31 5.6 SIDE INLETS AND APPROACHES ...... 31 5.7 ADEQUACY OF THE OUTLET ...... 31

6.0 OPINION OF PROBABLE COST ...... 33

7.0 SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS ...... 46

7.1 BENEFITED AREA AND FUNDING ...... 46 7.2 PERMITS & REGULATORY REQUIREMENTS ...... 46 7.3 SOCIAL IMPACTS ...... 46 7.4 ECONOMIC IMPACTS ...... 46

PENNINGTON COUNTY DITCH #1 IMPROVEMENT II DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT TABLE OF CONTENTS 7.5 ENVIRONMENTAL & LAND USE CRITERIA ...... 48

8.0 CONCLUSIONS AND RECOMMENDATIONS ...... 51

9.0 BIBLIOGRAPHY ...... 52

LIST OF FIGURES

FIGURE 1. PROJECT LOCATION MAP ...... 2 FIGURE 2. HIGH FLOWS IN THE CD 1 DRAINAGE AREA ...... 5 FIGURE 3. FLOODING IN CD 1 DRAINAGE AREA ...... 6 FIGURE 4. PONDING OCCURS AFTER RUNOFF EVENTS ...... 7 FIGURE 5. CD 1 OVERGROWN WITH VEGETATION ...... 7 FIGURE 6. PROJECT ALTERNATIVES MAP ...... 10 FIGURE 7. CD 1 ALIGNMENT AND STATIONING ...... 12 FIGURE 8. HEC‐HMS SCHEMATIC ...... 15 FIGURE 9. ALTERNATIVE 2 VS ALTERNATIVE 1 – 10 YEAR EVENT ...... 18 FIGURE 10. ALTERNATIVE 3 VS ALTERNATIVE 1 – 10 YEAR EVENT ...... 19 FIGURE 11. ALTERNATIVE 4 VS ALTERNATIVE 1 – 10 YEAR EVENT ...... 19 FIGURE 12. ALTERNATIVE 5 VS ALTERNATIVE 1 – 10 YEAR EVENT ...... 20 FIGURE 13. ALTERNATIVE 6 VS ALTERNATIVE 1 – 10 YEAR EVENT ...... 20 FIGURE 14. ALTERNATIVE 7 VS ALTERNATIVE 1 – 10 YEAR EVENT ...... 21 FIGURE 15. ALTERNATIVE 2 VS ALTERNATIVE 1 – 100 YEAR EVENT...... 21 FIGURE 16. ALTERNATIVE 3 VS ALTERNATIVE 1 – 100 YEAR EVENT...... 22 FIGURE 17. ALTERNATIVE 4 VS ALTERNATIVE 1 – 100 YEAR EVENT...... 22 FIGURE 18. ALTERNATIVE 5 VS ALTERNATIVE 1 – 100 YEAR EVENT...... 23 FIGURE 19. ALTERNATIVE 6 VS ALTERNATIVE 1 – 100 YEAR EVENT...... 23 FIGURE 20. ALTERNATIVE 7 VS ALTERNATIVE 1 – 100 YEAR EVENT...... 24 FIGURE 21. IMPACTS NEAR EDGEWOOD DRIVE AND DALE STREET ...... 25 FIGURE 22. TYPICAL SECTIONS AND DETAILS ...... 29 FIGURE 23. DIVERSION DETAILS ...... 30 FIGURE 24. BENEFITED AREA ...... 47 FIGURE 25. LAND USE MAP ...... 50

LIST OF TABLES

TABLE 1. ALTERNATIVES AND OPTIONS ...... 9 TABLE 2. CD 1 RIGHT‐OF‐WAY NEEDS ...... 13 TABLE 3. DESIGN STORM EVENTS FOR CD 1 ...... 16 TABLE 4. DRAINAGE AREAS ...... 16 TABLE 5. PEAK FLOW RATES AND PROPOSED DITCH CAPACITY ...... 17 TABLE 6. DITCH GEOMETRY ...... 26 TABLE 7. DITCH GRADES ...... 27

PENNINGTON COUNTY DITCH #1 IMPROVEMENT III DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT TABLE OF CONTENTS TABLE 8. CULVERT SCHEDULE ...... 27 TABLE 9. STORM SEWER CAPACITIES ...... 28 TABLE 10. ALTERNATIVE 2 – OPTION A PROBABLE COST ...... 33 TABLE 11. ALTERNATIVE 2 – OPTION B PROBABLE COST ...... 34 TABLE 12. ALTERNATIVE 2 – OPTION A ‐ URBAN PROBABLE COST ...... 35 TABLE 13. ALTERNATIVE 2 – OPTION B ‐ URBAN PROBABLE COST ...... 36 TABLE 14. ALTERNATIVE 3 – OPTION A PROBABLE COST ...... 37 TABLE 15. ALTERNATIVE 3 – OPTION B PROBABLE COST ...... 38 TABLE 16. ALTERNATIVE 4 – PROBABLE COST ...... 39 TABLE 17. ALTERNATIVE 4 – URBAN PROBABLE COST ...... 40 TABLE 18. ALTERNATIVE 5 – PROBABLE COST ...... 41 TABLE 19. ALTERNATIVE 6 – PROBABLE COST ...... 42 TABLE 20. ALTERNATIVE 6 – URBAN PROBABLE COST ...... 43 TABLE 21. ALTERNATIVE 7 PROBABLE COST ...... 44 TABLE 22. DESIGN ALTERNATIVE SELECTION TABLE (LANDOWNER COST PARTICIPATION IS ASSUMED TO BE 25%) ...... 45 TABLE 23. PENNINGTON COUNTY DITCH 1 CURRENT LAND USAGE ...... 50

APPENDICES

APPENDIX A. PETITION APPENDIX B. ALTERNATIVE PROS AND CONS / UTILITIES APPENDIX C. LANDOWNERS AND RIGHT‐OF‐WAY

PENNINGTON COUNTY DITCH #1 IMPROVEMENT IV DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT TABLE OF CONTENTS ACRONYMS AND SHORT FORMS

CD County Ditch

CFS Cubic Feet per Second

CN Curve Number

CR County Road

CSAH County State-Aid Highway

CSP-A Corrugated Steel Pipe-Arch Culvert

CSP Corrugated Steel Pipe Culvert

DNR Department of Natural Resources

GPS Geographic Positioning System

HEC USACE Hydrologic Engineering Center

HMS HEC Hydrologic Modeling System

Mn/DOT Minnesota Department of Transportation

NGS National Geodetic Survey

RAS HEC River Analysis System

RCP-A Reinforced Concrete Pipe-Arch Culvert

RCP Reinforced Concrete Pipe Culvert

RLWD Red Lake Watershed District

SCS Soil Conservation Service

SWCD Soil and Water Conservation District

TH Trunk Highway

WCA Wetland Conservation Act

PENNINGTON COUNTY DITCH #1 IMPROVEMENT V DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT INTRODUCTION

1.0 INTRODUCTION

Pennington County Ditch #1 (CD 1) has been a source of agricultural and urban flooding problems for years. Since its construction 100 or more years ago, the ditch has routinely flooded out of its banks in spite of cleanouts and culvert replacements. In 2005, the Pennington County Board of Commissioners and Thief River Falls City Council requested that HDR Engineering conduct a drainage study and provide a report of findings. The affected 5-6 square mile drainage area that was studied is shown in Figure 1. The drainage area shown in Figure 1 represents the drainage area when significant flooding occurs. During smaller storm events, the drainage area may vary, due to the difference in ditch flow versus overland flow directions. Additional study partners included the Red Lake Watershed District, Mn/DOT, and Rocksbury Township.

The purpose of the 2005 study was to present findings and recommendations for storm drainage infrastructure for both existing and future conditions. The existing and future drainage patterns were re-created during the analysis in order to understand the probable causes of the drainage problems and flooding, and identify structural improvements to the drainage infrastructure in the area which could help alleviate flooding. Due to funding limitations and procedural uncertainties relating to Minnesota ditch law, no entity was able to advance the project forward until a landowner petition was received by the Red Lake Watershed District (RLWD) in 2009.

In response to this petition, the RLWD has prepared this Detailed Survey Report for the consideration of the Thief River Falls Flood Damage Reduction Project and CD 1 Improvement. Upon construction, the ditch will be re-named RLWD Ditch #14, falling under the administrative authority of the RLWD.

The goal of the project is to reduce the impacts of local flooding, while allowing the potential for future development in the community and along Trunk Highway 59. Improvements may include increasing ditch cross-sectional area, steepening the slope of ditch grades, upsizing culverts, diversion of portions or all of CD 1 flows, and installing storm sewer in urbanized areas of Thief River Falls. Because of the project history and the number of entities that have a real interest in the outcome of the project, the report identifies alternatives that may actually go beyond the scope of the improvement petitioned for by landowners. A solution to the problem and funding for the project will likely require multiple partners as described throughout the Detailed Survey Report.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 1 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT INTRODUCTION FIGURE 1. PROJECT LOCATION MAP

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 2 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT INTRODUCTION

1.1 PETITION The Red Lake Watershed District has accepted a petition to improve CD 1 located southeast of, and within the City of Thief River Falls, Minnesota. A copy of the petition is provided in Appendix A. County Ditch #1 is located in Rocksbury and Smiley townships and the municipality of Thief River Falls in Pennington County. The proposed ditch has a drainage area of approximately six square miles. The petition reads as follows: “Petition for Improvement of Pennington County Ditch No. 1 under M.S. 103E.215. Whereas, the Petitioners are requesting improvements, as that term is defined by 103E.215 Subd. 2, to that drainage system, known as Pennington County Ditch No. 1; and Whereas, County Ditch No. 1 has insufficient capacity or needs enlarging to furnish sufficient capacity or a better outlet; and Whereas, the approximate description of the original portion of Pennington County Ditch No. 1 to be improved, is as follows: ‘Commencing at or near the SE corner of government lot 4, Section 34, Twp 154, R 43 W in the town of North on the Red Lake Indian Reservation line (now a part of the City of Thief River Falls), then south-southeasterly direction where it terminates at a point approximately 500 ft south of the north line of Section 19, Twp 153, R 42 W.’ Whereas, the Petitioners are interested in having Engineers appointed to examine the present drainage system and make an improvement report; and (Whereas, the names and addresses of the owners of the 40 acre tracts or government lots that the improvement passes over, or the name of the political subdivision, if the property is in its jurisdiction and is passed over by the proposed drainage project, are as follows) Whereas, the proposed improvement will be of public utility and promote the public health; and Whereas, the Petitioners are at least 26% of the owners of the property that the proposed improvement passes over; and Whereas, the Petitioners agree that they will pay all costs and expenses that may be incurred, if the improvement proceedings are dismissed; and Whereas, the Petitioner’s bond required by M.S. Statute 103E.202 Subd. 5, conditioned to pay the costs incurred if the proceedings are dismissed or a contract is not awarded to construct the proposed improvement, is attached.”

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 3 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT INTRODUCTION 1.2 DITCH IMPROVEMENT PROCESS The proposed improvement project is being conducted in compliance with the provisions of Minnesota Statute 103E. The engineering tasks associated with this project include performing preliminary survey, meeting with area landowners and petitioners, reviewing and analyzing the drainage problems, preparing the Preliminary Survey Report, presenting the report to regulatory agencies for advisory comments, conducting a preliminary public hearing, performing detailed survey, preparing the Detailed Survey Report, preparing the Viewer’s Report, and being available to hear testimony at the Final Hearing.

The petition calls for an improvement to CD 1. Due to site constraints (roads, utilities, buildings, etc.) involving the downstream portion of CD 1 located in the City of Thief River Falls, it will be difficult to achieve petitioner drainage goals strictly with a ditch improvement, due to social impacts and cost factors relating to the site constraints. Therefore, some sort of diversion will likely be required to achieve appropriate flood damage reduction benefits (103E.227). The Engineer has the authority to recommend a practical plan that is different than the petitioned plan (103E.275). Additional applicable ditch law statutes may include the following:

. Improvement 103E.215 . Engineer’s Variance 103E.275 . Improvement of Outlet 103E.221 . Diversion 103E.227 . Use of System as Outlet 103E.401 . Outlet for Municipality 103E.411 . Stormwater 103D.730 . Water Management District 103D.729

The Engineer is obligated to point out concerns and design issues as part of the recommendations. Therefore, the issue involving a full improvement of CD 1 as compared to other alternatives must be addressed up front so that a feasible set of alternatives can be developed. The alternatives presented in this report include diversion alternatives in accordance with the referenced statutes, and could require that the District initiate a separate diversion project in conjunction with an overall improvement to CD 1.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 4 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT NEED 2.0 PROJECT NEED

2.1 PROJECT HISTORY AND PERFORMANCE County Ditch 1 is located in Pennington County. CD 1 was established in the early 1900s and references were made in public records to possible diversions nearly 100 years ago. Its drainage problems stem from very flat grades (~1 foot per mile) as well as the presence of vegetation such as cattails and willows. Lateral areas draining into CD 1 are slow to drain due to high water on CD 1 and its own inability to drain effectively, thus many areas draining into CD 1 experience flooding problems. Figures 2 through 5 depict examples of the ongoing drainage problems.

FIGURE 2. HIGH FLOWS IN THE CD 1 DRAINAGE AREA

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 5 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT NEED FIGURE 3. FLOODING IN CD 1 DRAINAGE AREA

2.2 CONCERNS AND DESIGN ISSUES

The flow capacity of CD 1 varies depending on location. CD 1 currently has approximately a 5- year flood frequency capacity in some areas, and as low as 1-year flood frequency capacity in problem areas. The ditch frequently overtops and water backs into adjacent fields and urban commercial and residential developments. The tributary ditches are filled with standing water for long periods due to the inadequacy of CD 1. The current ditch is a public safety hazard, a public nuisance, and frequently causes property damages. The petitioners have determined that something needs to be done to improve this ditch for the benefit of all. Therefore, they are pursuing this improvement to CD 1.

Investigation of the survey data revealed that CD 1 does not have a consistent cross-sectional area or grade. This has promoted the growth of vegetation in areas, causing it to drain even more slowly. Drainage can be improved by widening the channel bottom, flattening the channel side slopes, and lowering and creating a more consistent channel bottom profile. Details of the hydraulic modeling results and related design issues are discussed in detail in Section 4.0 of this report.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 6 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT NEED FIGURE 4. PONDING OCCURS AFTER RUNOFF EVENTS

FIGURE 5. CD 1 OVERGROWN WITH VEGETATION

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 7 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESCRIPTION 3.0 PROJECT DESCRIPTION

3.1 ALTERNATIVES AND OPTIONS CONSIDERED Seven alternatives were evaluated for this project. All alternatives include some level of improvement to CD 1, and may include diversion alternatives. For clarification, the alternatives and options are listed in Table 1 and Figure 6 below. Urbanization is included as an option in many of the alternatives. The term “urbanization” refers to the addition of storm sewer pipes inside the City limits from Greenwood Street to the intersection of TH 59 and 1st Street East, just north of the Holiday gas station. The storm sewer would likely include an overflow ditch on top of the storm sewer. Urbanization may require the replacement of storm sewer pipes at the Edgewood Drive/TH 59/1st Street East intersection. Urbanization may also require the relocation of numerous utilities. A description of alternative pros and cons is located in Appendix B of this report.

Alternative 1 is the “do nothing” alternative. This alternative will not resolve flooding problems in the area.

Alternatives 2 and 3 include diversions of 50% (Alt 2) and 100% (Alt 3) of CD 1 flows at CSAH 8.  Option A references eastward diversions and Option B references westward diversions. Therefore, Alternatives 2A, 2A-Urban, and 3A divert CD 1 flows east in the south ditch of CSAH 8. The diversion crosses TH 59 to the east, and turns north to the east ditch of 167th Avenue NE, crosses Sorteberg Drive, and outlets to the Red Lake River.  Alternatives 2B, 2B-Urban, and 3B take advantage of the existing ditch on the south side of CSAH 8, including the Challenger Ditch established by the RLWD from the railroad tracks going west. These Challenger (CSAH 8) alternative and option combinations would require a maximum cut of 6 feet in the vicinity of 150th Ave. NE in order to drain the flows west to the Red Lake River.

Alternatives 4, 4-Urban, and 5 include diverting 50% (Alt 4) and 100% (Alt 5) of CD 1 flows at the northwest corner of the Aaseby trailer court, between CSAH 8 and CR 62. The diversion will take flows east in an existing ditch west of TH 59 and would require a new ditch up to 9 feet deep east of TH 59. This diversion would outlet to the Red Lake River north of Nelson Drive.

Alternatives 6 and 6-Urban include a full improvement of CD 1, with culvert upsizing, ditch grade lowering, cross-section enlargement, and full utility relocations. Urbanization is included

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 8 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESCRIPTION in Alternative 6-Urban, and will include storm sewer north of Greenwood Street. This option will also include installing new culverts /storm sewer under the TH 59/1st St East intersection.

Alternative 7 includes a full improvement of CD 1 with the ditch and culverts designed to carry a 10-year 24-hour storm event. This construction includes culvert upsizing, ditch grade changes, cross-section modifications, and utility relocations. Urbanization is not included in this alternative, and the existing culverts under the TH 59/1st St East intersection will remain in place.

TABLE 1. ALTERNATIVES AND OPTIONS Alt. Alternative Description Option Option Description 1 Do Nothing Do Nothing 2 Divert 50% of CD 1 flows at Challenger A East Diversion (CSAH 8) B West Diversion A- East Diversion with full urbanization Urban B- West Diversion with full urbanization Urban 3 Divert 100% of CD 1 flows at Challenger A East Diversion (CSAH 8) B West Diversion 4 Divert 50% of CD 1 flows at Aaseby East Diversion Urban East Diversion with full urbanization 5 Divert 100% of CD 1 flows at Aaseby East Diversion 6 Improvement of CD 1 / No Diversion Full improvement / no urbanization Urban Full improvement / urbanization 7 10-yr Storm Event CD #1 Improvement / Improvements / no urbanization / No Diversion / No Urbanization existing TH 59/1st St E culverts to remain in place

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 9 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESCRIPTION FIGURE 6. PROJECT ALTERNATIVES MAP

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 10 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESCRIPTION

3.2 SURVEYS Survey data was collected by the RLWD and HDR Engineering. Horizontal and vertical control was obtained from the NGS Control Bench Mark Number: TD0126 (Mn/DOT geodetic database: RINDAL MNDT). Ditch profiles and cross-sections were surveyed at regular intervals. Information from culverts, adjacent roadways, field inlets, and crossings was also collected.

3.3 DATA COLLECTION HDR has worked with the participating agencies to compile utility data, roadway plans, ditch profiles, and reports. The following information was collected:

City of Thief River Falls: Storm sewer maps Pennington County: CD 1 profiles, CSAH 7 and 8 (CR 7 and CR 8) roadway plans Mn/DOT: TH 59 plans RLWD: Challenger Ditch Engineer’s report and plans SWCD: CD 1 bank stabilization plans Utility Companies: Utility plans and design-locate information

This data is important to assess the infrastructure impacted by CD 1. This data assists in creating realistic plans, alignments, profiles, cross-sections, and cost estimates.

3.4 ALIGNMENT & STATIONING Figure 7 displays the general alignment and stationing of CD 1 and potential diversions. The stationing used for the plan set and for hydraulic modeling is shown in the figure. The hydraulic stationing is slightly different than the stationing used in the plan set due to software differences. The hydraulic stationing is denoted with the prefix “RAS”. Non-HEC-RAS project stationing used for this report and for the design was set so that Sta. 0+00 is located at the confluence of the Red Lake River. The plan and report stationing begins at Sta. 0+00 and terminates at Sta. 265+54, which is approximately 500’ south of County Road 59.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 11 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESCRIPTION FIGURE 7. CD 1 ALIGNMENT AND STATIONING

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 12 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESCRIPTION

3.5 PLANS & RIGHT-OF-WAY The existing right-of-way for CD 1 is unknown. File research and discussions with Pennington County staff were not able to determine if the right-of-way is a typical 33 feet on either side of the ditch centerline. The City of Thief River Falls mapping depicts an 85-foot wide utility easement and possibly right-of-way for CD 1 within the City limits. Easement for temporary and permanent right-of-way will be obtained for the ditch system. The ditch statute requires a minimum permanently vegetated buffer zone of one rod from the top of the excavated slope or to the top of the spoil slope on the ditch side, which ever is greater. Temporary right-of-way will be purchased, as needed, beyond the permanent right-of-way to provide for construction access and spoil disposal. Recommended right-of-way corridor widths are shown in Table 2. Right-of-way drawings are included in Appendix C.

TABLE 2. CD 1 RIGHT-OF-WAY NEEDS East of West of Temporary CD 1 Main Ditch Centerline Centerline Right‐of‐Way Red Lake River to 1st St. Sta 0+00 to 10+50 40' 40' 40' Hwy 59 to Greenwood St. Sta 16+00 to 42+00 * 35' 0 *0 Greenwood St. to South end of ditch Sta 42+00 to 265+54 60' 60' 40' * Assumes 85' Existing Right of Way

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 13 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA 4.0 PROJECT DESIGN CRITERIA

4.1 DESIGN GOALS

The goal of this project is to increase the hydraulic capacity of CD 1 and reduce the level and frequency of flooding along CD 1 and surrounding areas such as the TH 59 roadside ditches and other adjacent township road and field ditches.

The primary design considerations are project function, cost, and impacts to the environment. Improvements must restore and enhance the proper functioning of the ditch. Project costs must be acceptable to provide a feasible project. Impacts to the environment, such as draining of wetlands, must be avoided, minimized, or mitigated.

4.2 DESIGN CRITERIA Project goals were discussed with landowners and representatives of all involved entities during a project coordination meeting, and represent the best-case scenario. The following design criteria were used to analyze the hydraulic adequacy of the improved channel:  Channel containment of 10-year flows in rural/agricultural areas south of Greenwood Street (no freeboard required).  Channel and storm sewer pipe containment for 100-year flows in urban areas north of Greenwood Street (no freeboard required). Alternative 7 is an exception in the fact that the ditch will only contain 10-year flows north of Greenwood Street.

4.3 HYDROLOGY HDR conducted site reconnaissance to gather hydrologic data such as SCS Curve Numbers, channel roughness coefficients (Manning’s “n”), culvert information, document drainage patterns, and identify potential project and problem areas. CD 1 resembles a smaller field type ditch upstream of County Road 20 (Hazel Road), with a much broader cross-section on the order of an 8-foot ditch bottom with 3:1 side slopes from that point downstream to the outlet near First Street. It was clear that CD 1 and other drainage ditches in the study area have grown up with cattails and other vegetation.

The flows used for the project were developed using the RLWD’s Hydrologic Model. The drainage area was divided up into the seven different sub-watersheds to accurately simulate the flows entering the system at a given location. The flows for 10- and 100-year events were analyzed for each alternative.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 14 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA

Based on a meeting with the project petitioners and balancing the cost with drainage requirements, the 10-year and 100-year peak flow was selected for rural channel design and urban channel and storm sewer design, respectively. Alternative 7 is a lower cost design that will only provide 10-year peak flow capacity throughout the system, both in the rural and urban areas of the project. For alternatives meeting both design goals, it was determined that the consideration of these flows would provide the needed protection for agricultural production without increasing the cost of improvements beyond a socially acceptable value, and selecting the 100-year flow for urban design would protect the City of Thief River Falls from property damages and almost yearly nuisance that arises whenever there is a significant storm. Figure 8 displays a schematic from the original hydrologic model, with the subwatersheds shown.

FIGURE 8. HEC-HMS SCHEMATIC

4.3.1 Design Storm Data

The rainfall events used for the HEC-HMS model were taken from the Rainfall Frequency Atlas of the Midwest, by Huff and Angel. Potential future runoff increases due to additional

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 15 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA impervious development was accounted for by increasing curve numbers, and the City of Thief River Falls should also consider imposing storm water runoff controls on future development in order to maintain existing drainage area characteristics. See Table 3 for design rainfall amounts. Some values are for information only and were not used in project design. See Figure 7 (above) for flow input locations.

TABLE 3. DESIGN STORM EVENTS FOR CD 1 Event Rainfall Amount (in.) 2-year 24-hour 2.16 5-year 24-hour 2.94 10-year 24 hour 3.69 50-year 24-hour 5.41 100-year 24-hour 6.11

4.3.2 Design Rainfall Distribution

All storm events in the HEC-HMS model utilized the SCS Type II rainfall distribution.

4.3.3 Subwatersheds

Several subwatersheds contribute flows to CD 1. Roadside ditches of CSAH 20, CSAH 7, Challenger (CSAH 8), CR 62, Greenwood Street, as well as the Aaseby and drainage area outletting near the TH 59/1st Street East intersection transport flows to CD 1. Table 4 displays approximate drainage areas used in the hydrologic model.

TABLE 4. DRAINAGE AREAS

Subwatershed Description Drainage Area (Sq. mi.) CSAH 20 1.26 CSAH 7 1.70 Challenger (CSAH 8) 1.32 Aaseby 0.63 CR 62 0.24 Greenwood Street 0.25 TH 59/1st St E 0.31

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 16 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA 4.3.4 Peak Flow Rates

Table 5 shows calculated existing and future peak flow rates at the listed HEC-RAS station. Flows in the system are somewhat attenuated by the existing culverts. Peak flows slowly increase as you move downstream because of the storage upstream of the existing culverts. Flows remain at their peak for longer periods of time further downstream. This causes the longest duration of peak flows in the urban locations within the city limits of Thief River Falls. An improvement to CD 1 will cause some increases in downstream flows, but these increases will be within the capacity of the improved system.

The table also shows the approximate capacity of the proposed ditch design, based on the proposed ditch grade, 10-12 foot bottom width, 3:1 (H:V) side slopes, average ditch depth, and assumed Manning’s “n” of 0.035. Some stretches of CD 1 are deeper than others; therefore short stretches of ditch could potentially carry more flow than others.

TABLE 5. PEAK FLOW RATES AND PROPOSED DITCH CAPACITY 10-year Peak Flow 100-year Peak Flow Proposed Cumulative (cfs) (cfs) Ditch Drainage Capacity, Subwatershed RAS- Area Alt 2-6 Description Station (mi2) Existing Future Existing Future (cfs) CSAH 20 218+67 1.26 52 58 106 117 90 CSAH 7 182+27 2.96 104 111 213 225 210 Challenger 254 100+79 4.28 140 155 287 314 (CSAH 8) Aaseby 71+43 4.91 162 172 334 349 252 CR 62 56+43 5.15 165 183 342 371 487 Greenwood Street 40+45 5.40 166 190 346 385 745 Holiday/TH 59 11+55 5.71 171 208 358 428 430

4.4 HYDRAULICS

Hydraulic modeling of CD 1 open channel flow was performed using HEC-RAS 4.0. Storm sewer modeling was conducted using Flowmaster and HY-8. Project geometry was created by importing the survey information into ArcGIS and using HEC-GeoRAS tools to create bank stations, channel centerlines, cross-sections, ineffective flow areas, downstream reach lengths, and roadway deck information. Comparisons of existing and proposed water surface profiles are shown in Figure 9-20 for the 10- and 100-year events. The bottom profile represents the ditch

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 17 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA bottom or storm sewer invert. Each vertical line represents a culvert. The profile for the existing conditions model dips after each culvert due to an anomaly in the software Actual water surface elevation results are not affected as long as the results are reported by the HEC-RAS station number.

FIGURE 9. ALTERNATIVE 2 VS ALTERNATIVE 1 – 10 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 18 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA FIGURE 10. ALTERNATIVE 3 VS ALTERNATIVE 1 – 10 YEAR EVENT

FIGURE 11. ALTERNATIVE 4 VS ALTERNATIVE 1 – 10 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 19 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA FIGURE 12. ALTERNATIVE 5 VS ALTERNATIVE 1 – 10 YEAR EVENT

FIGURE 13. ALTERNATIVE 6 VS ALTERNATIVE 1 – 10 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 20 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA FIGURE 14. ALTERNATIVE 7 VS ALTERNATIVE 1 – 10 YEAR EVENT

FIGURE 15. ALTERNATIVE 2 VS ALTERNATIVE 1 – 100 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 21 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA FIGURE 16. ALTERNATIVE 3 VS ALTERNATIVE 1 – 100 YEAR EVENT

FIGURE 17. ALTERNATIVE 4 VS ALTERNATIVE 1 – 100 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 22 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA FIGURE 18. ALTERNATIVE 5 VS ALTERNATIVE 1 – 100 YEAR EVENT

FIGURE 19. ALTERNATIVE 6 VS ALTERNATIVE 1 – 100 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 23 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT PROJECT DESIGN CRITERIA FIGURE 20. ALTERNATIVE 7 VS ALTERNATIVE 1 – 100 YEAR EVENT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 24 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS 5.0 RESULTS & ADDITIONAL CONSIDERATIONS

5.1 IMPROVED DITCH CROSS-SECTIONS The CD 1 ditch modifications begin in Section 19 of Smiley Township (Station 265+53) and continue northwesterly to Section 34 of North Township in the City of Thief River Falls. The ditch improvements were designed to allow 10-year flow rates through the ditch below natural ground along the entire length of the improved ditch.

In some locations, particularly near the intersection of Dale Street and Edgewood Drive, urbanization and/or improvement of the ditch could cause impacts to surrounding property, requiring buildings, utilities and even portions of Edgewood Drive to be relocated. An example cross-section, showing the impact of urbanization, is shown in Figure 21 below.

FIGURE 21. IMPACTS NEAR EDGEWOOD DRIVE AND DALE STREET

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 25 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS In areas where the diversion channel is parallel to a major roadway (i.e. CSAH 8, TH 59), the inslope of the ditch will be 4:1 (H:V) where possible. Slopes of 4:1 or flatter are considered recoverable slopes. When motorists encroach upon a recoverable slope, they can generally stop or slow their vehicle enough to return to the roadway safely. Slopes of 3:1 will be used on the backslope in order to allow mowing or spraying of the slopes.

The proposed ditch cross-sections for each alternative are shown in Table 6 below. Typical ditch sections and details are shown in Figure 22 and Figure 23 on the following pages.

TABLE 6. DITCH GEOMETRY Alt. Ditch Bottom (ft) Side Slopes (H:V) 1 Do Nothing Do Nothing 2 12’ u/s of diversion; 10’ d/s of diversion; 10’ diversion 3:1 CD 1; 3:1 and 4:1 diversion 3 12’ u/s of diversion; 10’ d/s of diversion; 12’ diversion 3:1 CD 1; 3:1 and 4:1 diversion 4 12’ u/s of diversion; 10’ d/s of diversion; 10’ diversion 3:1 CD 1; 3:1 and 4:1 diversion 5 12’ u/s of diversion; 10’ d/s of diversion; 12’ diversion 3:1 CD 1; 3:1 and 4:1 diversion 6 12’ full length of CD 1 3:1 CD 1 including Edgewood 7 8-12’ full length of CD 1 3:1 entire length of CD 1

5.2 IMPROVED DITCH GRADES The proposed grade of the channel will be set such that it has a more consistent grade throughout the reach, thus, improving the sluggish grade in portions of CD 1.

For the West Challenger Diversion alternatives, a portion of the ditch will need to change flow direction, creating the need for a maximum ditch cut of 6 feet at the Challenger (CSAH 8) and 150th Ave NE intersection.

For the Aaseby Diversion and East Challenger Diversion alternatives, the ditch grade will remain consistent throughout the reach. The proposed grades allow for a steadily flowing ditch, without creating an excessive amount of earthwork. Examples of the proposed ditch grades for full improvements are listed in Table 7 below.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 26 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS TABLE 7. DITCH GRADES Reach Stations Proposed Slope CD 1 0+00 to 16+08 Existing grade CD 1 16+08 to 233+37 0.031% CD 1 233+37 to 257+49 0.028% CD 1 257+49 to 265+53 0.276% Challenger Diversion – West 345+44 to 394+31 0.048% Challenger Diversion – West 303+94 to 345+44 0.135% Challenger Diversion – West 300+00 to 303+94 0.062% Challenger Diversion – East 500+00 to 592+83 0.022% Aaseby Diversion – East 400+00 to 470+34 0.050%

5.3 CULVERT IMPROVEMENTS Proposed culvert sizing is based on results of the HEC-RAS analysis. Depending on the alternative chosen, varying degrees of culvert upsizing may be used. As an extreme case, see the example culvert schedule for Alternative 6B in Table 8 below for more details. The addition of culvert capacity at each location will greatly enhance the function of the ditch.

TABLE 8. CULVERT SCHEDULE Proposed Proposed Proposed Proposed Location Station Existing Culvert Shape Size Length Material Cty Rd 59 257+75 30" CSP Pipe Arch 64" x 43" 54 CSP Approx 835' DS of Cty Rd 59 249+50 24" CSP Circle (2) 42" 52 CSP Cty Hwy 20 220+16 42" x 27" RCP‐APipe Arch 73" x 45" 132 Concrete Approx 945' US of Cty Hwy 7 193+00 48" CSP Circle (2) 48" 51 CSP Cty Hwy 7 183+80 (2) 36" RCP Pipe Arch 73" x 45" 90 Concrete Approx 2455' DS yof Cty Hw 7 172+00 48" CSP Circle (2) 48" 50 CSP Approx 3565' US of CSAH 8 139+00 42" CSP Circle (2) 60" 54 CSP CSAH 8/Challenger 102+29 48" RCP Circle 96" 92 Concrete Approx 1200' DS of CSAH 8 90+00 42" CSP Circle 96" 60 CSP Cty Rd 62 57+91 42" CSP Circle 96" 100 Concrete Greenwood to Hwy 59 Urbanization 41+93 N/A Pipe Arch 88" x 54" 2638 Concrete Greenwood St 41+93 48" RCP Pipe Arch 88" x 54" 100 Concrete Dale St 28+00 72" X 46" CSP‐APipe Arch 88" x 54" 68 Concrete Apt Driveway N of Dale St 25+74 72" X 46" CSP‐APipe Arch 88" x 54" 60 Concrete Holiday/1st St/Hwy 59 13+11 (2) 36" RCP RCB 8'x6' RCB 600 Concrete

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 27 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS 5.4 STORM SEWER IMPROVEMENTS Urbanization alternatives include the option to install storm sewer between Greenwood Street and the TH 59/1st St intersection. Alternatives 2A-U, 2B-U, 4-U, and 6-U include storm sewer installation. As shown in Table 9 below, the combination of the storm sewer and an overflow ditch on top of the storm sewer will carry flows from the 100-year event.

TABLE 9. STORM SEWER CAPACITIES Storm Sewer Storm Sewer Size (between Recurrence Interval Recurrence Interval Capacity Alternative Greenwood and TH 59) Capacity (storm sewer) (storm sewer + overflow ditch) Alternative 2A-U 73” x 45” RC Arch 5- to 10-year 100-year Alternative 2B-U 73” x 45” RC Arch 5- to 10-year 100-year Alternative 4-U 73” x 45” RC Arch 5- to 10-year 100-year Alternative 6-U 88” x 54” RC Arch 10- to 25-year 100-year

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 28 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS FIGURE 22. TYPICAL SECTIONS AND DETAILS

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 29 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS FIGURE 23. DIVERSION DETAILS

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 30 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS

5.5 UTILITIES HDR has contacted Gopher State One Call to obtain design-locate utility information on utilities located inside the project area. In the rural areas of the project, most of the utilities are located inside the road right-of-way at each section line. Types of utilities include telephone, underground and overhead electric, fiber optic cable, natural gas lines, storm sewer, sanitary sewer, and water lines.

Appendix B displays the general locations of these utilities as well as a schedule of utilities in the CD 1 right-of-way. Costs associated with utility relocations for each alternative are indicated in the cost estimates in Section 6.0 of this report.

5.6 SIDE INLETS AND APPROACHES Side inlet pipe culverts will be installed where needed along the entire length of CD 1, the Challenger (Alt 2/3), and the Aaseby (Alt 4/5) diversions. These will be located at every major field ditch, where appropriate. Each side inlet pipe culvert shall be equipped with a flap gate on the outlet and riprap protection to reduce possibility of backflow, erosion, and sediment transport to the channel. The culverts will be corrugated steel pipe.

5.7 ADEQUACY OF THE OUTLET The Red Lake River has a drainage area upstream of Thief River Falls of about 4,000 square miles, and is a significantly larger watercourse than CD 1. Given such a large receiving watercourse, when considering the upstream watershed contributed by CD 1 is 5-6 square miles depending upon the severity of the flood, it has been concluded that the adequacy of the outlet is not in question. The outlet for the proposed improvements is adequate. The project is also consistent with the Mediation Agreement goals, and should be considered to have a negligible affect on increased downstream flooding.

The diverted drainage area is potentially about 4 square miles. This is also a small diverted area when compared to the receiving watercourse (Red Lake River). The diversion would be “early water” for the Red Lake River. The diversion is in the middle area for the Red River of the North, and this type of FDR measure receives a “variable” rating from the Flood Damage Reduction Work GroupTechnical Paper #11 in the middle area. A diversion receives a positive rating in an early area.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 31 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT RESULTS & ADDITIONAL CONSIDERATIONS

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 32 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST

6.0 OPINION OF PROBABLE COST The following tables outline the estimated costs for the alternatives based on 2010 rates. TABLE 10. ALTERNATIVE 2 – OPTION A PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Excavation 73,132 C.Y. $2.25 $164,547.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 14,445 C.Y. $3.00 $43,335.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 846 L.F. $60.00 $50,760.00 72" CSP Culvert 58 L.F. $136.00 $7,888.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 83" x 57" CSP Arch Culvert 68 L.F. $141.00 $9,588.00 48" RCP Culvert 118 L.F. $135.00 $15,930.00 72" RCP Culvert 182 L.F. $235.00 $42,770.00 73" x 45" RCP Arch Culvert 220 L.F. $193.00 $42,460.00 88" x 54" RCP Arch Culvert 794 L.F. $262.00 $208,028.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 28 EA $900.00 $25,200.00 72" CSP Aprons 2 EA $1,627.00 $3,254.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 83" x 57" CSP Arch Aprons 2 EA $1,630.00 $3,260.00 48" RCP Pipe Aprons 2 EA $975.00 $1,950.00 72" RCP Pipe Aprons 4 EA $1,628.00 $6,512.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Aprons 6 EA $1,937.00 $11,622.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Trash Guard Racks 3 EA $1,400.00 $4,200.00 Diversion Structure and Sluice Gate 1 EA $50,000.00 $50,000.00 Class III Random Riprap 1,036 C.Y. $60.00 $62,160.00 Geotextile Fabric - Type 4 under RipRap 1,750 S.Y. $2.50 $4,375.00 Remove Existing Curb and Gutter 200 L.F. $3.00 $600.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 1,820 S.Y. $2.50 $4,550.00 Replace Roadway Pavement 614 Ton $100.00 $61,400.00 Geogrid - Type BX110 under Pavement 1,860 S.Y. $5.00 $9,300.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $85,600.00 $85,600.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,600.00 $61,600.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $19,366.00 $19,366.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 3,893 Ton $8.00 $31,144.00 Turf Establishment 85 Acre $550.00 $46,750.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 17 EA $200.00 $3,400.00 Subtotal $1,444,033.00 Land Acquisition and Easements 66 Acre $1,500.00 $99,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $361,009.00 Materials Testing $15,000.00 Contingencies 15 % $216,605.00 Total Construction $2,142,397.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 33 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 11. ALTERNATIVE 2 – OPTION B PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Excavation 95,312 C.Y. $2.25 $214,452.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 15,323 C.Y. $3.00 $45,969.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 946 L.F. $60.00 $56,760.00 54" CSP Culvert 62 L.F. $75.00 $4,650.00 72" CSP Pipe Culvert 58 L.F. $136.00 $7,888.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 83" x 57" CSP Arch Culvert 68 L.F. $141.00 $9,588.00 36" RCP Culvert 540 L.F. $75.00 $40,500.00 48" RCP Culvert 110 L.F. $135.00 $14,850.00 72" RCP Culvert 182 L.F. $235.00 $42,770.00 73" x 45" RCP Arch Culvert 220 L.F. $193.00 $42,460.00 88" x 54" RCP Arch Culvert 794 L.F. $262.00 $208,028.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 28 EA $900.00 $25,200.00 54" CSP Pipe Aprons 2 EA $1,000.00 $2,000.00 72" CSP Pipe Aprons 2 EA $1,360.00 $2,720.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 83" x 57" CSP Arch Pipe Aprons 2 EA $1,630.00 $3,260.00 36" RCP Pipe Aprons 4 EA $812.00 $3,248.00 48" RCP Pipe Aprons 2 EA $975.00 $1,950.00 72" RCP Aprons 3 EA $1,627.00 $4,881.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Pipe Aprons 6 EA $1,937.00 $11,622.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Trash Guard Racks 3 EA $1,400.00 $4,200.00 Floodplain outlet ditch 1 L.S. $50,000.00 $50,000.00 Diversion Structure and Sluice Gate 1 EA $50,000.00 $50,000.00 36" RCP Culvert - R/R jacking 80 L.F. $500.00 $40,000.00 Class III Random Riprap 1,109 C.Y. $60.00 $66,540.00 Class IV Random Riprap - Diversion Drop Structure Inlet/Outlet 148 C.Y. $65.00 $9,620.00 Geotextile Fabric - Type 4 under RipRap 2,380 S.Y. $2.50 $5,950.00 Remove Existing Curb and Gutter 200 L.F. $3.00 $600.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 2,090 S.Y. $2.50 $5,225.00 Replace Roadway Pavement 706 Ton $100.00 $70,600.00 Geogrid - Type BX110 under Pavement 2,150 S.Y. $5.00 $10,750.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower and Relocate RLEC OH & UG Power Lines 1 L.S. $25,900.00 $25,900.00 Lower or Relocate Qwest fiber -phone 1 L.S. $100,000.00 $100,000.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $39,000.00 $39,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $36,786.00 $36,786.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 4,232 Ton $8.00 $33,856.00 Turf Establishment 86 Acre $550.00 $47,300.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 15 EA $200.00 $3,000.00 Subtotal $1,704,607.00 Land Acquisition and Easements 65 Acre $1,500.00 $97,500.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $426,152.00 Materials Testing $15,000.00 Contingencies 15 % $255,692.00 Total Construction $2,505,701.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 34 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 12. ALTERNATIVE 2 – OPTION A - URBAN PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Fill 1,628 C.Y. $3.00 $4,884.00 Common Excavation 90,808 C.Y. $2.25 $204,318.00 Common Excavation and Removal by Truck 4,938 C.Y. $8.00 $39,504.00 Topsoil salvage and replacement 14,445 C.Y. $3.00 $43,335.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CS Pipe Culvert 104 L.F. $48.00 $4,992.00 48" CS Pipe Culvert 846 L.F. $60.00 $50,760.00 72" CS Pipe Culvert 58 L.F. $136.00 $7,888.00 64"x 43" CS Pipe Arch Culvert 54 L.F. $100.00 $5,400.00 48" RC Pipe Culvert 118 L.F. $135.00 $15,930.00 72" RC Pipe Culvert 118 L.F. $235.00 $27,730.00 65" x 40" RC Pipe Arch Culvert 228 L.F. $166.00 $37,848.00 73" x 45" RC Pipe Arch Culvert 2,858 L.F. $193.00 $551,594.00 88" x 54" RC Pipe Arch Culvert 600 L.F. $262.00 $157,200.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 28 EA $900.00 $25,200.00 72" CSP Pipe Aprons 2 EA $1,360.00 $2,720.00 64" x 43" CSP Pipe Arch Aprons 2 EA $900.00 $1,800.00 48" RC Pipe Aprons 2 EA $975.00 $1,950.00 72" RC Pipe Aprons 3 EA $1,627.00 $4,881.00 65" x 40" RCP Arch Pipe Aprons 6 EA $1,104.00 $6,624.00 73" x 45" RCP Arch Pipe Aprons 5 EA $1,270.00 $6,350.00 88" x 54" RCP Arch Pipe Aprons 1 EA $1,937.00 $1,937.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 108" Manhole Risers 7 EA $6,096.00 $42,672.00 Collection Structure 1 EA $25,000.00 $25,000.00 Diversion Structure and Sluice Gate 1 EA $50,000.00 $50,000.00 Trash Guard Rack 1 EA $1,400.00 $1,400.00 Class III Random Riprap 1,000 C.Y. $60.00 $60,000.00 Geotextile Fabric - Type 4 under RipRap 1,690 S.Y. $2.50 $4,225.00 Remove Existing Curb and Gutter 221 L.F. $3.00 $663.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 1,820 S.Y. $2.50 $4,550.00 Replace Roadway Pavement 614 Ton $100.00 $61,400.00 Geogrid - Type BX110 under Pavement 1,860 S.Y. $5.00 $9,300.00 Replace Curb and Gutter 221 L.F. $13.00 $2,873.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $85,600.00 $85,600.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,600.00 $61,600.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $19,366.00 $19,366.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall Fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 5,243 Ton $8.00 $41,944.00 Turf Establishment 85 Acre $550.00 $46,750.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 17 EA $200.00 $3,400.00 Subtotal $1,978,888.00 Land Acquisition and Easements 66 Acre $1,500.00 $99,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $494,722.00 Materials Testing $15,000.00 Contingencies 15 % $296,834.00 Total Construction $2,891,194.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 35 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 13. ALTERNATIVE 2 – OPTION B - URBAN PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Fill 1,628 C.Y. $3.00 $4,884.00 Common Excavation 112,988 C.Y. $2.25 $254,223.00 Common Excavation and Removal by Truck 4,938 C.Y. $8.00 $39,504.00 Topsoil salvage and replacement 15,323 C.Y. $3.00 $45,969.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CS Pipe Culvert 104 L.F. $48.00 $4,992.00 48" CS Pipe Culvert 946 L.F. $60.00 $56,760.00 54" CS Pipe Culvert 62 L.F. $75.00 $4,650.00 72" CS Pipe Culvert 120 L.F. $136.00 $16,320.00 64"x 43" CS Pipe Arch Culvert 54 L.F. $100.00 $5,400.00 36" RC Pipe Culvert 540 L.F. $75.00 $40,500.00 48" RC Pipe Culvert 110 L.F. $135.00 $14,850.00 72" RC Pipe Culvert 188 L.F. $235.00 $44,180.00 65" x 40" RC Pipe Arch Culvert 228 L.F. $166.00 $37,848.00 73" x 45" RC Pipe Arch Culvert 2,858 L.F. $193.00 $551,594.00 88" x 54" RC Pipe Arch Culvert 600 L.F. $262.00 $157,200.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 28 EA $900.00 $25,200.00 54" CSP Pipe Aprons 2 EA $1,000.00 $2,000.00 72" CSP Pipe Aprons 2 EA $1,360.00 $2,720.00 64" x 43" CSP Pipe Arch Aprons 2 EA $900.00 $1,800.00 36" RC Pipe Aprons 4 EA $812.00 $3,248.00 48" RC Pipe Aprons 2 EA $975.00 $1,950.00 72" RC Pipe Aprons 3 EA $1,627.00 $4,881.00 65" x 40" RCP Arch Pipe Aprons 6 EA $1,104.00 $6,624.00 73" x 45" RCP Arch Pipe Aprons 5 EA $1,270.00 $6,350.00 88" x 54" RCP Arch Pipe Aprons 1 EA $1,937.00 $1,937.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 108" Manhole Risers 7 EA $6,096.00 $42,672.00 Collection Structure 1 EA $25,000.00 $25,000.00 Diversion Structure and Sluice Gate 1 EA $50,000.00 $50,000.00 Trash Guard Rack 1 EA $1,400.00 $1,400.00 Floodplain outlet ditch 1 L.S. $50,000.00 $50,000.00 36" RCP Culvert - R/R jacking 80 L.F. $500.00 $40,000.00 Class III Random Riprap 1,109 C.Y. $60.00 $66,540.00 Geotextile Fabric - Type 4 under RipRap 1,880 S.Y. $2.50 $4,700.00 Remove Existing Curb and Gutter 221 L.F. $3.00 $663.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 1,820 S.Y. $2.50 $4,550.00 Replace Roadway Pavement 614 Ton $100.00 $61,400.00 Geogrid - Type BX110 under Pavement 1,860 S.Y. $5.00 $9,300.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower and Relocate RLEC OH & UG Power Lines 1 EA $25,900.00 $25,900.00 Lower or Relocate Qwest fiber -phone 1 L.S. $100,000.00 $100,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $39,000.00 $39,000.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $36,786.00 $36,786.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall Fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 6,165 Ton $8.00 $49,320.00 Turf Establishment 85 Acre $550.00 $46,750.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 15 EA $200.00 $3,000.00 Subtotal $2,250,465.00 Land Acquisition and Easements 66 Acre $1,500.00 $99,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $562,617.00 Materials Testing $15,000.00 Contingencies 15 % $337,570.00 Total Construction $3,271,402.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 36 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 14. ALTERNATIVE 3 – OPTION A PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Excavation 75,764 C.Y. $2.25 $170,469.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 14,445 C.Y. $3.00 $43,335.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 902 L.F. $60.00 $54,120.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 83"x 57" CSP Arch Culvert 200 L.F. $145.00 $29,000.00 48" RCP Culvert 298 L.F. $135.00 $40,230.00 73" x 45" RCP Arch Culvert 220 L.F. $193.00 $42,460.00 88" x 54" RCP Arch Culvert 238 L.F. $263.00 $62,594.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 30 EA $900.00 $27,000.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 83" x 57" CSP Arch Pipe Aprons 6 EA $2,040.00 $12,240.00 48" RCP Pipe Aprons 5 EA $975.00 $4,875.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Pipe Aprons 4 EA $1,937.00 $7,748.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Trash Guard Racks 3 EA $1,400.00 $4,200.00 Diversion Structure 1 L.S. $50,000.00 $50,000.00 Class III Random Riprap 1,028 C.Y. $60.00 $61,680.00 Geotextile Fabric - Type 4 under RipRap 1,745 S.Y. $2.50 $4,363.00 Remove Existing Curb and Gutter 100 L.F. $3.00 $300.00 Remove Roadway Pavement 492 S.Y. $2.50 $1,230.00 Replace Roadway Pavement 166 Ton $100.00 $16,600.00 Geogrid - Type BX110 under Pavement 530 S.Y. $5.00 $2,650.00 Replace Curb and Gutter 100 L.F. $13.00 $1,300.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $85,600.00 $85,600.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $11,000.00 $11,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,600.00 $61,600.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $19,366.00 $19,366.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 2,805 Ton $8.00 $22,440.00 Turf Establishment 85 Acre $550.00 $46,750.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 17 EA $200.00 $3,400.00 Subtotal $1,180,734.00 Land Acquisition and Easements 66 Acre $1,500.00 $99,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $295,184.00 Materials Testing $15,000.00 Contingencies 15 % $177,111.00 Total Construction $1,773,779.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 37 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 15. ALTERNATIVE 3 – OPTION B PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Excavation 99,886 C.Y. $2.25 $224,744.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 15,323 C.Y. $3.00 $45,969.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 1,070 L.F. $60.00 $64,200.00 66" CSP Culvert 286 L.F. $85.00 $24,310.00 72" CSP Culvert 62 L.F. $100.00 $6,200.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 48" RCP Culvert 298 L.F. $135.00 $40,230.00 54" RCP Culvert 80 L.F. $145.00 $11,600.00 60" RCP Culvert 460 L.F. $175.00 $80,500.00 66" RCP Culvert 110 L.F. $191.00 $21,010.00 73" x 45" RCP Arch Culvert 220 L.F. $193.00 $42,460.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 34 EA $900.00 $30,600.00 66" CSP Pipe Aprons 6 EA $1,100.00 $6,600.00 72" CSP Pipe Aprons 2 EA $1,200.00 $2,400.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 48" RCP Pipe Aprons 5 EA $975.00 $4,875.00 54" RCP Pipe Aprons 2 EA $1,150.00 $2,300.00 60" RCP Pipe Aprons 2 EA $1,270.00 $2,540.00 66" RCP Pipe Aprons 2 EA $1,449.00 $2,898.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Diversion Structure 1 L.S. $50,000.00 $50,000.00 Drop structure at diversion outlet 1 L.S. $49,000.00 $49,000.00 Floodplain outlet ditch 1 L.S. $50,000.00 $50,000.00 Trash Guard Rack 3 EA $1,400.00 $4,200.00 54" RCP Culvert - R/R jacking 80 L.F. $750.00 $60,000.00 Class III Random Riprap 1,203 C.Y. $60.00 $72,180.00 Class IV Random Riprap - Diversion Drop Structure Inlet/Outlet 148 C.Y. $65.00 $9,620.00 Geotextile Fabric - Type 4 under RipRap 2,470 S.Y. $2.50 $6,175.00 Remove Existing Curb and Gutter 100 L.F. $3.00 $300.00 Remove Roadway Pavement 762 S.Y. $2.50 $1,905.00 Replace Roadway Pavement 258 Ton $100.00 $25,800.00 Geogrid - Type BX110 under Pavement 800 S.Y. $5.00 $4,000.00 Replace Curb and Gutter 100 L.F. $13.00 $1,300.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower City UG Power Lines 1 EA $5,000.00 $5,000.00 Lower and Relocate RLEC OH & UG Power Lines 1 L.S. $25,900.00 $25,900.00 Lower or Relocate Qwest fiber -phone 1 L.S. $100,000.00 $100,000.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $11,000.00 $11,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $39,000.00 $39,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $36,786.00 $36,786.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 3,984 Ton $8.00 $31,872.00 Turf Establishment 86 Acre $550.00 $47,300.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 15 EA $200.00 $3,000.00 Subtotal $1,531,958.00 Land Acquisition and Easements 65 Acre $1,500.00 $97,500.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $382,990.00 Materials Testing $15,000.00 Contingencies 15 % $229,794.00 Total Construction $2,263,992.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 38 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 16. ALTERNATIVE 4 – PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Excavation 91,295 C.Y. $2.25 $205,414.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 13,753 C.Y. $3.00 $41,259.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 530 L.F. $60.00 $31,800.00 54" CSP Culvert 104 L.F. $81.00 $8,424.00 78" CSP Culvert 58 L.F. $147.00 $8,526.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 83" x 57" CSP Arch Culvert 68 L.F. $141.00 $9,588.00 48" RCP Culvert 220 L.F. $135.00 $29,700.00 72" RCP Culvert 132 L.F. $235.00 $31,020.00 73" x 45" RCP Arch Culvert 220 L.F. $193.00 $42,460.00 88" x 54" RCP Arch Culvert 794 L.F. $262.00 $208,028.00 102" x 62" RCP Arch Culvert 88 L.F. $339.00 $29,832.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 18 EA $900.00 $16,200.00 54" CSP Pipe Aprons 4 EA $975.00 $3,900.00 78" CSP Pipe Aprons 2 EA $1,475.00 $2,950.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 83" x 57" CSP Arch Pipe Aprons 2 EA $1,630.00 $3,260.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 48" RCP Pipe Aprons 6 EA $975.00 $5,850.00 72" RCP Pipe Aprons 3 EA $1,627.00 $4,881.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Pipe Aprons 4 EA $1,937.00 $7,748.00 102" x 62" RCP Arch Pipe Aprons 6 EA $2,830.00 $16,980.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Trash Guard Racks 3 EA $1,400.00 $4,200.00 Diversion Structure 1 EA $50,000.00 $50,000.00 Class III Random Riprap 1,036 C.Y. $60.00 $62,160.00 Geotextile Fabric - Type 4 under RipRap 1,750 S.Y. $2.50 $4,375.00 Remove Existing Curb and Gutter 200 L.F. $3.00 $600.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 1,781 S.Y. $2.50 $4,453.00 Replace Roadway Pavement 601 Ton $100.00 $60,100.00 Geogrid - Type BX110 under Pavement 1,870 S.Y. $5.00 $9,350.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $85,600.00 $85,600.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,600.00 $61,600.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $27,600.00 $27,600.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 3,194 Ton $8.00 $25,552.00 Turf Establishment 78 Acre $550.00 $42,900.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 21 EA $200.00 $4,200.00 Subtotal $1,512,994.00 Land Acquisition and Easements 69 Acre $1,500.00 $103,500.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $378,249.00 Materials Testing $15,000.00 Contingencies 15 % $226,950.00 Total Construction $2,243,443.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 39 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 17. ALTERNATIVE 4 – URBAN PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Fill 1,628 C.Y. $3.00 $4,884.00 Common Excavation 108,971 C.Y. $2.25 $245,185.00 Common Excavation and Removal by Truck 4,938 C.Y. $8.00 $39,504.00 Topsoil salvage/covering 13,753 C.Y. $3.00 $41,259.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 530 L.F. $60.00 $31,800.00 54" CSP Culvert 104 L.F. $81.00 $8,424.00 78" CSP Culvert 58 L.F. $147.00 $8,526.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 48" RCP Culvert 220 L.F. $135.00 $29,700.00 72" RCP Culvert 138 L.F. $235.00 $32,430.00 65" x 40" RCP Arch Culvert 228 L.F. $166.00 $37,848.00 73" x 45" RCP Arch Culvert 2,858 L.F. $193.00 $551,594.00 88" x 54" RCP Arch Culvert 600 L.F. $262.00 $157,200.00 102" x 62" RCP Arch Culvert 88 L.F. $339.00 $29,832.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 18 EA $900.00 $16,200.00 54" CSP Pipe Aprons 4 EA $975.00 $3,900.00 78" CSP Pipe Aprons 2 EA $1,475.00 $2,950.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 48" RCP Pipe Aprons 6 EA $975.00 $5,850.00 72" RCP Pipe Aprons 3 EA $1,627.00 $4,881.00 65" x 40" RCP Arch Pipe Aprons 6 EA $1,103.00 $6,618.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Pipe Aprons 1 EA $1,937.00 $1,937.00 102" x 62" RCP Arch Pipe Aprons 2 EA $2,830.00 $5,660.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Diversion Structure 1 EA $50,000.00 $50,000.00 Collection Structure 1 EA $25,000.00 $25,000.00 108" Manhole Risers 7 EA $6,096.00 $42,672.00 Trash Guard Rack 1 EA $1,400.00 $1,400.00 Class III Random Riprap 1,063 C.Y. $60.00 $63,780.00 Geotextile Fabric - Type 4 under RipRap 1,795 S.Y. $2.50 $4,488.00 Remove Existing Curb and Gutter 200 L.F. $3.00 $600.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 1,781 S.Y. $2.50 $4,453.00 Replace Roadway Pavement 601 Ton $100.00 $60,100.00 Geogrid - Type BX110 under Pavement 1,870 S.Y. $5.00 $9,350.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $85,600.00 $85,600.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,600.00 $61,600.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $27,600.00 $27,600.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 5,089 Ton $8.00 $40,712.00 Turf Establishment 78 Acre $550.00 $42,900.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 21 EA $200.00 $4,200.00 Subtotal $2,065,809.00 Land Acquisition and Easements 69 Acre $1,500.00 $103,500.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $516,453.00 Materials Testing $15,000.00 Contingencies 15 % $309,872.00 Total Construction $3,017,384.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 40 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 18. ALTERNATIVE 5 – PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 9 Acre $2,000.00 $18,000.00 Common Excavation 99,243 C.Y. $2.25 $223,297.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 13,753 C.Y. $3.00 $41,259.00 18" CSP Culvert 600 L.F. $22.00 $13,200.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 924 L.F. $60.00 $55,440.00 66" CSP Culvert 76 L.F. $100.00 $7,600.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 48" RCP Culvert 482 L.F. $135.00 $65,070.00 66" RCP Culvert 88 L.F. $190.00 $16,720.00 72" RCP Culvert 104 L.F. $236.00 $24,544.00 73" x 45" RCP Arch Culvert 220 L.F. $193.00 $42,460.00 18" CSP Pipe Aprons 20 EA $150.00 $3,000.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 33 EA $900.00 $29,700.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 48" RCP Pipe Aprons 12 EA $975.00 $11,700.00 66" RCP Pipe Aprons 2 EA $1,449.00 $2,898.00 72" RCP Pipe Aprons 2 EA $1,628.00 $3,256.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 Flapgate for 18" CS Pipe Culvert 20 EA $275.00 $5,500.00 Trash Guard Rack 1 EA $1,400.00 $1,400.00 Diversion Structure 1 EA $50,000.00 $50,000.00 Class III Random Riprap 1,092 C.Y. $60.00 $65,520.00 Geotextile Fabric - Type 4 under RipRap 1,785 S.Y. $2.50 $4,463.00 Remove Existing Curb and Gutter 200 L.F. $3.00 $600.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 453 S.Y. $2.50 $1,133.00 Replace Roadway Pavement 153 Ton $100.00 $15,300.00 Geogrid - Type BX110 under Pavement 520 S.Y. $5.00 $2,600.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $85,600.00 $85,600.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,600.00 $61,600.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $27,600.00 $27,600.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 2,921 Ton $8.00 $23,368.00 Turf Establishment 78 Acre $550.00 $42,900.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 21 EA $200.00 $4,200.00 Subtotal $1,247,712.00 Land Acquisition and Easements 69 Acre $1,500.00 $103,500.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $311,928.00 Materials Testing $15,000.00 Contingencies 15 % $187,157.00 Total Construction $1,872,047.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 41 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 19. ALTERNATIVE 6 – PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 8 Acre $2,000.00 $16,000.00 Common Excavation 92,417 C.Y. $2.25 $207,939.00 Common Excavation and Removal by Truck 10,914 C.Y. $8.00 $87,312.00 Topsoil salvage/covering 10,678 C.Y. $3.00 $32,034.00 18" CSP Culvert 450 L.F. $22.00 $9,900.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 202 L.F. $60.00 $12,120.00 60" CSP Culvert 108 L.F. $90.00 $9,720.00 96" CSP Culvert 60 L.F. $181.00 $10,860.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 96" RCP Culvert 192 L.F. $340.00 $65,280.00 73" x 45" RCP Arch Culvert 222 L.F. $193.00 $42,846.00 8' Span x 6' Rise RC Box Culvert 962 L.F. $410.00 $394,420.00 18" CSP Pipe Aprons 15 EA $150.00 $2,250.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 8 EA $900.00 $7,200.00 60" CSP Pipe Aprons 4 EA $1,525.00 $6,100.00 96" CSP Pipe Aprons 2 EA $3,116.00 $6,232.00 96" RCP Pipe Aprons 4 EA $3,300.00 $13,200.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 8' Span x 6' Rise RC Box Culvert End Sections 6 EA $2,830.00 $16,980.00 Flapgate for 18" CS Pipe Culvert 15 EA $275.00 $4,125.00 Trash Guard Racks 3 EA $1,400.00 $4,200.00 Class III Random Riprap 593 C.Y. $60.00 $35,580.00 Geotextile Fabric - Type 4 under RipRap 965 S.Y. $2.50 $2,413.00 Remove Existing Curb and Gutter 1,563 L.F. $3.00 $4,689.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 6,110 S.Y. $2.50 $15,275.00 Replace Roadway Pavement 2,059 Ton $100.00 $205,900.00 Geogrid - Type BX110 under Pavement 6,300 S.Y. $5.00 $31,500.00 Replace Curb and Gutter 1,563 L.F. $13.00 $20,319.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $75,000.00 $75,000.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $61,000.00 $61,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $19,366.00 $19,366.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove Apartment Garage 1 EA $40,000.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 4,612 Ton $8.00 $36,896.00 Turf Establishment 68 Acre $550.00 $37,400.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Street Lights 7 EA $1,600.00 $11,200.00 Relocate Signs and Appurtenances 16 EA $200.00 $3,200.00 Subtotal $1,781,328.00 Land Acquisition and Easements 60 Acre $1,500.00 $90,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $445,332.00 Materials Testing $15,000.00 Contingencies 15 % $267,200.00 Total Construction $2,605,610.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 42 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 20. ALTERNATIVE 6 – URBAN PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 8 Acre $2,000.00 $16,000.00 Common Fill 1,628 C.Y. $3.00 $4,884.00 Common Excavation 95,267 C.Y. $2.25 $214,351.00 Common Excavation and Removal by Truck 4,938 C.Y. $8.00 $39,504.00 Topsoil salvage/covering 10,678 C.Y. $3.00 $32,034.00 18" CSP Culvert 450 L.F. $22.00 $9,900.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 202 L.F. $60.00 $12,120.00 60" CSP Culvert 108 L.F. $90.00 $9,720.00 96" CSP Culvert 60 L.F. $181.00 $10,860.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 96" RCP Culvert 192 L.F. $340.00 $65,280.00 73" x 45" RCP Arch Culvert 222 L.F. $193.00 $42,846.00 88" x 54" RCP Arch Culvert 2,866 L.F. $263.00 $753,758.00 96" x 72" RC Box Culvert 600 L.F. $410.00 $246,000.00 18" CSP Pipe Aprons 15 EA $150.00 $2,250.00 42" CSP Pipe Aprons 4 EA $800.00 $3,200.00 48" CSP Pipe Aprons 8 EA $900.00 $7,200.00 60" CSP Pipe Aprons 4 EA $1,525.00 $6,100.00 96" CSP Pipe Aprons 2 EA $3,116.00 $6,232.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 96" RCP Pipe Aprons 4 EA $3,300.00 $13,200.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Pipe Aprons 7 EA $1,937.00 $13,559.00 96" x 72" RC Box Culvert 1 EA $2,830.00 $2,830.00 Flapgate for 18" CS Pipe Culvert 15 EA $275.00 $4,125.00 Collector Structure 1 EA $25,000.00 $25,000.00 144" Manhole Risers 7 EA $12,000.00 $84,000.00 Trash Guard Rack 1 EA $1,400.00 $1,400.00 Class III Random Riprap 620 C.Y. $60.00 $37,200.00 Geotextile Fabric - Type 4 under RipRap 1,010 S.Y. $2.50 $2,525.00 Remove Existing Curb and Gutter 200 L.F. $3.00 $600.00 Remove Storm Sewer under TH #59 (2 lines) 1,170 L.F. $10.00 $11,700.00 Remove Roadway Pavement 1,639 S.Y. $2.50 $4,098.00 Replace Roadway Pavement 554 Ton $100.00 $55,400.00 Geogrid - Type BX110 under Pavement 1,650 S.Y. $5.00 $8,250.00 Replace Curb and Gutter 200 L.F. $13.00 $2,600.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $4,700.00 $4,700.00 Lower Sewer Main 1 L.S. $25,000.00 $25,000.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $75,000.00 $75,000.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $29,000.00 $29,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $27,000.00 $27,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $19,366.00 $19,366.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 4,343 Ton $8.00 $34,744.00 Turf Establishment 68 Acre $550.00 $37,400.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 11 EA $200.00 $2,200.00 Subtotal $2,162,408.00 Land Acquisition and Easements 60 Acre $1,500.00 $90,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $540,602.00 Materials Testing $15,000.00 Contingencies 15 % $324,362.00 Total Construction $3,139,122.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 43 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST TABLE 21. ALTERNATIVE 7 PROBABLE COST Item Quantity Unit Unit Cost Cost Mobilization 1 L.S. $30,000.00 $30,000.00 Clearing and Grubbing 8 Acre $2,000.00 $16,000.00 Common Excavation 47,558 C.Y. $2.25 $107,006.00 Common Excavation and Removal by Truck 5,068 C.Y. $8.00 $40,544.00 Topsoil salvage/covering 8,878 C.Y. $3.00 $26,634.00 18" CSP Culvert 450 L.F. $22.00 $9,900.00 42" CSP Culvert 104 L.F. $48.00 $4,992.00 48" CSP Culvert 312 L.F. $60.00 $18,720.00 78" CSP Culvert 60 L.F. $147.00 $8,820.00 64"x 43" CSP Arch Culvert 54 L.F. $100.00 $5,400.00 72" RCP Culvert 92 L.F. $235.00 $21,620.00 78" RCP Culvert 92 L.F. $275.00 $25,300.00 73" x 45" RCP Arch Culvert 222 L.F. $193.00 $42,846.00 88" x 54" RCP Arch Culvert 416 L.F. $263.00 $109,408.00 18" CSP Pipe Aprons 15 EA $150.00 $2,250.00 42" CSP Pipe Aprons 2 EA $800.00 $1,600.00 48" CSP Pipe Aprons 12 EA $900.00 $10,800.00 78" CSP Pipe Aprons 2 EA $1,475.00 $2,950.00 72" RCP Pipe Aprons 2 EA $1,627.00 $3,254.00 78" RCP Pipe Aprons 2 EA $1,925.00 $3,850.00 64" x 43" CSP Arch Pipe Aprons 2 EA $900.00 $1,800.00 73" x 45" RCP Arch Pipe Aprons 4 EA $1,270.00 $5,080.00 88" x 54" RCP Arch Culvert Aprons 4 EA $1,937.00 $7,748.00 Flapgate for 18" CS Pipe Culvert 15 EA $275.00 $4,125.00 Trash Guard Racks 2 EA $1,400.00 $2,800.00 Inlet grate and structure 1 L.S. $4,000.00 $4,000.00 Class III Random Riprap 558 C.Y. $60.00 $33,480.00 Geotextile Fabric - Type 4 under RipRap 915 S.Y. $2.50 $2,288.00 Remove Existing Curb and Gutter 202 L.F. $3.00 $606.00 Remove Roadway Pavement 461 S.Y. $2.50 $1,153.00 Replace Roadway Pavement 156 Ton $100.00 $15,600.00 Geogrid - Type BX110 under Pavement 461 S.Y. $5.00 $2,305.00 Replace Curb and Gutter 202 L.F. $13.00 $2,626.00 Lower Water Service 4 EA $4,000.00 $16,000.00 Lower Sewer Service 5 EA $2,000.00 $10,000.00 Lower Water Main 1 EA $700.00 $700.00 Lower Sewer Main 1 L.S. $14,550.00 $14,550.00 Lower City UG Power Lines 2 EA $5,000.00 $10,000.00 Lower or Relocate Qwest fiber -phone 1 L.S. $58,200.00 $58,200.00 Lower or Relocate MERC Nat. Gas Lines 1 L.S. $24,000.00 $24,000.00 Lower or Relocate Sjobergs fiber -cable 1 L.S. $50,000.00 $50,000.00 Lower or Relocate Wikstrom fiber optic lines 1 L.S. $19,366.00 $19,366.00 Relocate Sheds 16 EA $2,500.00 $40,000.00 Remove / Reinstall fence 300 L.F. $20.00 $6,000.00 Aggregate Bedding - for Structures and Roadways 4,142 Ton $8.00 $33,136.00 Turf Establishment 22 Acre $550.00 $12,100.00 Traffic Control 1 L.S. $10,000.00 $10,000.00 Sediment/Erosion Control 1 L.S. $20,000.00 $20,000.00 Relocate Signs and Appurtenances 10 EA $200.00 $2,000.00 Subtotal $901,557.00 Land Acquisition and Easements 60 Acre $1,500.00 $90,000.00 Temporary Right of Way 45 Acre $150.00 $6,750.00 Engineering and Admin. (Inc. Legal Ditch Engineers Reports and Hearings) 25 % $225,390.00 Materials Testing $15,000.00 Contingencies 15 % $135,234.00 Total Construction $1,373,931.00

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 44 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT OPINION OF PROBABLE COST

Table 22 displays the cost for each alternative and the calculated benefit in reduction of water surface elevation compared to the existing conditions. It is assumed that the landowner costs for the project are 25% of the totals given the magnitude of the problem and the large public benefit from an overall diversion and/or improvement project. In actuality, the landowner financial participation could be more or less. Please note that landowner participation is not calculated based upon assessed values. Final landowner costs may be revised to account for real property values after the viewing process.

TABLE 22. DESIGN ALTERNATIVE SELECTION TABLE (LANDOWNER COST PARTICIPATION IS ASSUMED TO BE 25%)

Alternative Selection Table *Cost Per *Pay / Ac Ras Station 37+03 Ras Station 174+34 Acre / Yr Greenwood St. CSAH 7 (Local 10-Year 100-Year 10-Year 100-Year Share- (WSE (WSE (WSE (WSE 25% Local Alt. Description of Alternative Total Cost Not decrease decrease decrease decrease Share (20 yrs @ Based compared compared compared compared 6%) Upon to to to to Assessed existing in existing in existing in existing in Value) feet) feet) feet) feet) 1 Do Nothing N/A N/A N/A - N/A N/A N/A N/A 2A Divert Flow 50% East at CSAH 8 $2,142,397 $535,600 $166.70 $14.33 2.67 1.84 2.78 2.44 2B Divert Flow 50% West at CSAH 8 $2,505,701 $626,426 $194.97 $16.76 2.67 1.84 2.78 2.44 2A-U Divert Flow 50% East at CSAH 8 w/ Urbanization $2,891,194 $722,799 $224.96 $19.34 2.67 1.84 2.78 2.44 2B-U Divert Flow 50% West at CSAH 8 w/ Urbanization $3,271,402 $817,851 $254.54 $21.88 2.67 1.84 2.78 2.44 3A Divert Flow 100% East at CSAH 8 $1,773,779 $443,445 $138.02 $11.87 4.14 4.08 2.75 1.59 3B Divert Flow 100% West at CSAH 8 $2,263,992 $565,998 $176.16 $15.14 4.14 4.08 2.75 1.59 4 Divert Flow 50% East at Aaseby Road $2,243,443 $560,861 $174.56 $15.01 2.61 2.16 2.26 1.26 4-U Divert Flow 50% East at Aaseby Road w/ Urbanization $3,017,384 $754,346 $234.78 $20.18 2.61 2.16 2.26 1.26 5 Divert Flow 100% East at Aaseby Road $1,872,047 $468,012 $145.66 $12.52 4.83 5.33 2.61 1.29 6 No Diversion, Full Improvement $2,605,610 $651,403 $202.74 $17.43 2.77 1.06 2.86 1.21 6-U No Diversion, Full Urbanization and Improvement $3,139,122 $784,781 $244.25 $21.00 2.77 1.06 2.86 1.21 7 No Diversion, Full Improvement, No Urbanization $1,373,931 $343,483 $106.90 $9.19 1.61 0.41 2.55 2.00 *Not Based Upon Assessed Value

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 45 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS

7.0 SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS

7.1 BENEFITED AREA AND FUNDING The existing CD 1 benefited area map is displayed in Figure 24 below. The existing benefited area does not match well with the current drainage area of CD 1. The benefited area needs to be re-determined in conjunction with the RLWD and the Viewers through the viewing process.

Possible funding partners for any future project may include State/Federal grants, the City of Thief River Falls, Mn/DOT, RLWD, benefiting landowners, and others. Statute 103E.011 does allow multiple funding sources to be used, as opposed to a project wholly funded by the benefited area landowners. Minnesota statute 103D.905 may allow the RLWD to levy a special tax across the entire District for a project meeting certain criteria. Statute 103E.411 states that the ditch authority may determine the amount that the municipality (The City of Thief River Falls) must pay to use the drainage system as an outlet for its municipal drainage system. It is likely that future project costs will be cost shared by multiple government entities in addition to benefiting landowners.

7.2 PERMITS & REGULATORY REQUIREMENTS It is anticipated that permit approvals will be required from the Minnesota Department of Natural Resources (DNR) because the outlet of CD 1, the Red Lake River, is a public water protected by the DNR. Permit approvals may also be required from the Pennington County SWCD (WCA) and the US Army Corps of Engineers.

7.3 SOCIAL IMPACTS This project is socially and politically sensitive due to the potential for construction in urban and residential areas. Careful consideration and involvement from the public will be conducted in order to construct a socially acceptable project for the City and the rural benefited areas of the project.

7.4 ECONOMIC IMPACTS This project will result in a net positive economic impact over a number of years. The initial cost of construction will be offset over a period of time by reduced rural and urban flood damage costs and reduced costs associated with the flooding. Given the location of CD 1 in a growing urban area, the long-term benefits of this ditch improvement should be recognized as a necessary step in the long-term planning for the community.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 46 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS FIGURE 24. BENEFITED AREA

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 47 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS

7.5 ENVIRONMENTAL & LAND USE CRITERIA

This section addresses the Minnesota Statutes, 103E.015 criteria for consideration before drainage work is done.

1. Private and Public benefits and costs of the proposed drainage project: The private benefits of this project are the reduction of crop loss due to flooding, creating increased productivity of the land. This potentially has a positive affect on agricultural land values. Overland flooding causes significant loss of top soil. Public benefits are created by reducing potential flood damages to the City of Thief River Falls. This project reduces the safety hazards that are created by flooded ditches in urban settings. Public and private benefits outweigh the cost of constructing the proposed project by having a relatively short break-even period.

2. Present and anticipated agricultural land acreage available and use in the drainage project or system. The majority of the current land use in the CD 1 drainage area is agricultural. In the future, there could be some loss of agricultural land due to future development of the City of Thief River Falls. However, it is predicted that the majority of the CD 1 watershed area will remain agricultural for many years along with steady growth from the City.

3. Present and anticipated land use within the drainage project or system. The present land use in the CD 1 drainage basin is a mix of agricultural, residential, and commercial, with the majority of the watershed agricultural. Anticipated land use in the future could become slightly more commercial or residential, as the City of Thief River Falls grows to the south, but the majority of land should remain agricultural for many years.

Figure 25 shown below displays the current land use in the project area. Table 23 shows numeric values of the existing land use. Data was obtained from the DNR.

4. Flooding characteristics of the property in the drainage project or system and downstream for 5-, 10-, 25-, and 50-year flood events. The existing ditch currently has less than 5-year event capacity. The ditch flows out of its banks and standing water occurs in ditches for many days, or even weeks with more significant events (i.e. 25-year, 50-year). The existing ditch has extremely flat grades, with vegetation overgrowing the ditch, causing very slow drainage in the system. The system discharges into the Red Lake River, which is a tributary of the Red River of the North. The proposed project will increase the

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 48 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS capacity of the ditches to accommodate a 10-year event in rural areas of the project, which is the most practically cost-effective design. All flood discharges from the proposed project will be contained within the banks of the Red Lake River.

5. Waters to be drained and alternative measures to conserve, allocate, and use the waters including storage and retention of drainage waters. The project does not propose to drain any public waters. There will be an improvement and/or diversion of an agricultural drainage ditch that has developed wetland vegetation characteristics. The potential diversion ditch will re-allocate waters to utilize an additional ditch to store and convey the water to its eventual outlet. Storm water storage and retention (i.e. impoundments) is not practical within this watershed due to flat slopes and lack of topographic depressions.

6. Effect on water quality of constructing the proposed drainage system. The project will have a positive impact on water quality. The project will increase the ability of the ditch to convey flows, oxygenating the water, and decreasing stagnant water. The project will reduce agricultural losses of topsoil. The proposed project will incorporate side inlet pipes, a grassy buffer, and sufficient riprap at culverts to reduce the transport of sediment and topsoil in the ditch system.

7. Fish and wildlife resources affected by the proposed drainage system. The project area contains no wildlife management areas or resources to speak of. The land use is primarily agricultural, with some residential and commercial. The project will have a positive effect on water quality and will reduce sediment transport to downstream water bodies. Thus, it should increase in desirability for water resources and wildlife. It is not anticipated that the project will negatively impact vegetation or aquatic life in the system.

8. Shallow groundwater availability, distribution, and use in the drainage project or system. There are no known shallow groundwater reserves in the project area. Shallow ground water irrigation or sub-surface drainage is not practiced in the project drainage area.

9. Overall environmental impact of all the above criteria. The project incorporates modern ditch design principles of flatter side slopes, piped side water inlets and grassed buffer areas. The project should improve downstream water quality and provide environmental improvements to the watershed.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 49 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT SOCIAL, ECONOMIC & ENVIRONMENTAL IMPACTS TABLE 23. PENNINGTON COUNTY DITCH 1 CURRENT LAND USAGE Land Use Percent (%) Cultivated Land 68.22% Urban and Industrial 13.78% Deciduous Forest 8.11% Grassland 6.69% Farmsteads and Rural Residences 1.52% Transitional Ag Land 0.90% Rural Residential Development Complex 0.50% Grassland-Shrub-Tree 0.27% Water 0.01% Total 100.00%

FIGURE 25. LAND USE MAP

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 50 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT CONCLUSIONS AND RECOMMENDATIONS

8.0 CONCLUSIONS AND RECOMMENDATIONS

The petition calls for a full improvement of CD 1. An improvement of CD 1 all the way north to the Red Lake River may be prohibitive from a practical and cost standpoint in terms of impacts to property and existing infrastructure. It may be difficult to achieve petitioner goals with strictly a ditch improvement. Some diversion will likely be required to achieve acceptable flood damage reduction benefits.

Each alternative presented meets the design goals set forth by the project, except that Alternative 7 does not provide 100 year capacity within the City. It would be possible to consider additional alternatives containing lesser levels of flood protection in an effort to reduce costs. However, lesser design frequencies, such as 5-year agricultural capacity and 50-year urban protection are not proposed at this time.

The selection of a final alternative presents its own set of challenges from a practical and social standpoint that must be considered as outlined further in Appendix B. Non-diversion alternatives pose significant impacts within city limits to existing properties, buildings, roads, and utilities. Diversion alternatives pose the question of introducing significant “new CD 1 water” where CD 1 water does not currently drain. Of the diversion alternatives, the 2B-Urban and 3B Challenger Diversion (CSAH 8) has been talked about historically including the establishment of the Challenger Ditch in the 1990’s, and are more socially acceptable than eastern alternatives, albeit more expensive.

Alternatives 2B-Urban, 3A, 3B, and 5 include the following components: 1. Ditch cross-section enlargement 2. Ditch side slope and grade improvements 3. Culvert improvements 4. 100% Diversion

Alternative 2B-Urban is recommended for final design with the capability for 100% diversion (Alt 3B) because it achieves the design goals and landowner expectations of flood damage reduction at a reasonable cost that is most likely more socially acceptable than other alternatives. Alternative 2B-Urbanalso includes the Challenger Ditch outlet, which is downstream from a majority of the community. Additional components of any recommended or chosen alternative may include cleaning or re-grading of the Aaseby ditch between CD 1 and TH 59, and an extension of CD 1 in a southerly direction up to 1 mile.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 51 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT BIBLIOGRAPHY

9.0 BIBLIOGRAPHY

HDR Engineering, Inc. Pennington County Ditch 1 Drainage Study. Thief River Falls, MN, 2005.

Huff, Floyd A. and James R. Angel. Rainfall Frequency Atlas of the Midwest. Champaign: Illinois State Water Survey, 1992.

Minnesota Department of Transportation (Mn/DOT). "Road Design Manual." 2004.

Petitioners. "Petition for Improvement of Pennington County Ditch No. 1." Thief River Falls, MN, September 2009.

PENNINGTON COUNTY DITCH #1 IMPROVEMENT PAGE 52 DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

APPENDIX A. PETITION

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX A

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B

APPENDIX B. ALTERNATIVE PROS AND CONS / UTILITIES

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B

Alternative Pros and Cons

Alternatives 2A & 3A - Divert flow East at Challenger/CSAH 8  Diversion Structure  Utility Relocation and Lowering o Move 2,060 feet Sjoberg's Fiber Optic line  Provide Stable Diversion Outlet into River  Culverts under Hwy 59 need to be replaced to handle 100-yr event for 50% diversion

Alternatives 2B & 3B - Divert flow West at Challenger/CSAH 8  Diversion Structure  Utility Relocation and Lowering o Move 4,480 feet Wikstrom Fiber Optic line o Move 3,200 feet Red Lake Electric power lines o Move Qwest crossing box – $25,000  6 feet additional cut in ditch bottom through ridge  Pipe jacking 36” or 54” RCP under Railroad  Replace Drop Structure for 100% diversion  Provide Stable Diversion Outlet into River Through Floodplain  Culverts under Hwy 59 need to be replaced to handle 100-yr event for 50% diversion

Alternatives 4 & 5 - Divert flow East at Aaseby Road  Diversion Structure  Utility Relocation and Lowering o Move 2,760 feet Wikstrom Fiber Optic line o Move 2,250 feet Qwest Telephone line  Provide Stable Diversion Outlet into River  Culverts under Hwy 59 need to be replaced to handle 100-yr event for 50% Diversion

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B Alternative 6 - No Diversion with Full Improvement  Utility Relocation and Lowering, moving long runs of several utilities  Encroaching into all Adjoining Urban Properties  Apartment Garages need to be Demolished  Large Portion of Edgewood Drive needs to be relocated Westward, Encroaching into private front yards and driveways  Replace Streetlights, curb and gutter  Culverts under Hwy 59 need to be replaced to handle 100-yr event  Sinuous Natural channel North of First Street unable to handle flows  This Option forces fast moving water through an urban area in a large open ditch

Alternative 7 – No Diversion, Full Improvement, TH 59/1st St East culverts to remain in place  This option only has protection to a 10-year 24-hour storm event, will not solve flooding problems for large storm events  Open water ditch running through Thief River Falls  Utility Relocations, but not as many as in the Urbanization Alternatives  Edgewood Drive will not be disturbed, resulting in a huge cost savings  Less encroachment onto adjacent properties through the City  Apartment Garages can remain in place  Culverts under TH 59/1st St East can remain in place  TH 59/1st St East intersection will not need to be dug up and replaced  Cheapest Alternative , will provide some benefits at the lowest cost

Urbanization Alternatives - Divert flow East or West with urbanization within City Limits  Diversion Structure  Utility Relocation and Lowering - See Alternatives above, as well as:  Provide Stable Diversion Outlet into River for Diversions  2,638 feet of Storm Sewer, Greenwood St to Hwy 59  Collection Structure at Hwy 59 for Storm Sewer and Collector Ditch above  Seven Manhole Access and Drop Structures  Culverts under Hwy 59 need to be replaced for all Urbanization options  Sinuous Natural channel North of First Street unable to handle flows

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B CD 1 main ditch affects the following Utilities: o 20 Qwest Telephone lines o 11 Cable or Fiber Optic lines o Five Natural Gas lines o 18 City Storm or Sanitary Sewer lines o Nine City underground Electric lines o Five City Water lines

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITIES SCHEDULE FOR CD 1 APPROX. TYPE OF UTILITY LOCATION U/G OR O/H DIRECTION QWEST ‐ TELEPHONE 220+70 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 220+70 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 219+90 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 219+90 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 184+00 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 78+75 UNDERGROUND ADJACENT QWEST ‐ TELEPHONE 73+20 UNDERGROUND ADJACENT WIKSTROM ‐ FIBER OPTIC 58+45 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 58+00 UNDERGROUND CROSSING SJOBERGS ‐ CABLE 57+70 UNDERGROUND CROSSING MERC ‐ NAT. GAS 57+70 UNDERGROUND CROSSING CITY OF TRF ‐ STORM SEWER 50+40 UNDERGROUND ADJACENT MINNKOTA ELEC. LINE 42+30 OVERHEAD CROSSING MERC ‐ NAT. GAS 42+20 UNDERGROUND CROSSING MERC ‐ NAT. GAS 42+20 ‐ 28+30 UNDERGROUND ADJACENT ON WEST SLOPE CITY OF TRF ‐ SAN. SEWER 42+00 UNDERGROUND ADJACENT QWEST ‐ TELEPHONE 41+90 UNDERGROUND CROSSING CITY OF TRF ‐ WATER 41+80 UNDERGROUND CROSSING SJOBERGS ‐ CABLE 41+65 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 41+55 UNDERGROUND CROSSING ??? ELEC. LINE 41+50 OVERHEAD CROSSING QWEST ‐ TELEPHONE 41+50 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 41+50 ‐ 28+40 UNDERGROUND ADJACENT ON EAST SLOPE CITY OF TRF ‐ STORM SEWER 41+43 UNDERGROUND ADJACENT SJOBERGS ‐ FIBER OPTIC 41+40 ‐ 17+25 UNDERGROUND ADJACENT ON WEST SLOPE SJOBERGS ‐ CABLE 41+40 ‐ 28+35 UNDERGROUND ADJACENT ON EAST SLOPE CITY OF TRF ‐ SAN. SEWER 41+43 ‐ 16+00 UNDERGROUND ADJACENT ON WEST SLOPE CITY OF TRF ‐ SAN. SEWER 38+30 UNDERGROUND CROSSING MERC ‐ NAT. GAS 38+30 UNDERGROUND CROSSING CITY OF TRF ‐ WATER 38+30 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 38+30 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 38+30 ‐ 28+50 UNDERGROUND ADJACENT ON WEST SLOPE CITY OF TRF ‐ STORM SEWER 38+00 UNDERGROUND ADJACENT CITY OF TRF ‐ STORM SEWER 32+46 UNDERGROUND ADJACENT CITY OF TRF ‐ ELECTRIC 32+00 UNDERGROUND CROSSING CITY OF TRF ‐ ELECTRIC 32+00 ‐ 28+50 UNDERGROUND ADJACENT ON WEST SLOPE CITY OF TRF ‐ STORM SEWER 29+65 UNDERGROUND ADJACENT MERC ‐ NAT. GAS 28+30 UNDERGROUND CROSSING CITY OF TRF ‐ WATER 28+00 UNDERGROUND CROSSING

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITIES SCHEDULE (CONTINUED) CITY OF TRF ‐ WATER 28+00 ‐ 14+00 UNDERGROUND ADJACENT ON WEST SLOPE CITY OF TRF ‐ SAN. SEWER 27+90 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 26+00 UNDERGROUND CROSSING SJOBERGS ‐ CABLE 25+90 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 25+80 UNDERGROUND CROSSING CITY OF TRF ‐ STORM SEWER 24+60 UNDERGROUND ADJACENT CITY OF TRF ‐ STORM SEWER 23+05 UNDERGROUND ADJACENT CITY OF TRF ‐ STORM SEWER 21+90 UNDERGROUND ADJACENT MERC ‐ NAT. GAS 21+75 UNDERGROUND CROSSING CITY OF TRF ‐ ELECTRIC 21+70 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 21+50 UNDERGROUND CROSSING CITY OF TRF ‐ SAN. SEWER 20+65 UNDERGROUND CROSSING SJOBERGS ‐ CABLE 19+60 UNDERGROUND CROSSING SJOBERGS ‐ FIBER OPTIC 19+60 UNDERGROUND CROSSING CITY OF TRF ‐ STORM SEWER 17+35 UNDERGROUND ADJACENT QWESTTELEPHONE ‐ 15+40 UNDERGROUND CROSSING CITY OF TRF ‐ STREET LIGHTS 14+30 UNDERGROUND CROSSING CITY OF TRF ‐ WATER 14+10 UNDERGROUND CROSSING SJOBERGS ‐ FIBER OPTIC 14+05 UNDERGROUND CROSSING CITY OF TRF ‐ SAN. SEWER 13+90 UNDERGROUND CROSSING SJOBERGS ‐ CABLE 13+80 UNDERGROUND CROSSING CITY OF TRF ‐ ELECTRIC 13+70 UNDERGROUND CROSSING CITY OF TRF ‐ ELECTRIC 13+70 UNDERGROUND ABANDONED ‐ CROSSING CITY OF TRF ‐ ELECTRIC 13+15 UNDERGROUND CROSSING CITY OF TRF ‐ STORM SEWER 12+60 UNDERGROUND ADJACENT CITY OF TRF ‐ STREET LIGHTS 12+40 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 10+80 UNDERGROUND CROSSING MERC ‐ NAT. GAS 10+75 UNDERGROUND CROSSING QWEST ‐ TELEPHONE 10+70 UNDERGROUND CROSSING CITY OF TRF ‐ STORM SEWER 10+22 UNDERGROUND ADJACENT CITY OF TRFSTORM ‐ SEWER 10+22 UNDERGROUND ADJACENT SJOBERGS ‐ CABLE 7+60 UNDERGROUND CROSSING CITY OF TRF ‐ ELECTRIC 7+50 UNDERGROUND CROSSING

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITY INFORMATION – OUTLET TO DALE STREET

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITY INFORMATION – DALE STREET TO CR 62

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITY INFORMATION – COUNTY HWY 7 TO COUNTY RD 59

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITY INFORMATION – WEST DIVERSION

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX B UTILITY INFORMATION – EAST DIVERSION

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX C APPENDIX C. LANDOWNERS AND RIGHT-OF-WAY LANDOWNERS NORTH OF AASEBY DIVERSION

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX C LANDOWNERS IN COUNTY ROAD 61 AREA

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX C LANDOWNERS IN COUNTY HWY 7 AND COUNTY HWY 20 AREA

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515 RED LAKE WATERSHED DISTRICT APPENDIX C LANDOWNERS AT SOUTH END OF PROJECT

PENNINGTON COUNTY DITCH #1 IMPROVEMENT DETAILED SURVEY REPORT RED LAKE WATERSHED DISTRICT DITCH #14 (PROJECT NO. 171) HDR PROJECT NO. 131515