Exhibit A Mn/DOT Contract No

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1 SCOPE OF WORK AND DELIVERABLES Water Resources Engineering for US 52 and CSAH 24 Interchange in Cannon Falls S.P PROJECT OVERVIEW The State, Goodhue County and City of Cannon Falls have determined a need for an overpass at US Highway 52 (US 52) and County State-Aid Highway (CSAH) 24 in the City of Cannon Falls, a new interchange south of the overpass and a frontage road system within the 2.0 miles project length along US 52. Construction of the overpass and interchange will accommodate the growing truck and other heavy vehicular traffic at at-grade intersections within the project area. The construction will also replace the remaining two signals on this High Priority Interregional Corridor (IRC) between the Twin Cities and Rochester, provide connectivity of US 52 with other roadways in the area, and improve traffic safety. The work under this contract is part of the detail design of the project and covers water resource engineering (WRE) services including, but not limited to, detail design of hydraulics, erosion control and turf establishment necessary for construction of the new interchange project. SP is scheduled for letting on January 25, The Contractor will submit all deliverables as required to meet the letting date, in accordance with the following schedule: 1. 95% submittals to State (Construction Plans, Special Provisions, Engineer s Construction Cost Estimate) August 6, % submittals to State (Construction Plans, Special Provisions, Engineer s Construction Cost Estimate) (PS&E)... September 6, State Plan Turn-in to MnDOT Central Office.... October 18, 2012 Plan review and PS&E submittals will be made solely through the State s Project Manager. 1.0 PROJECT MANAGEMENT FOR WRE (Activity Code 1010) The Contractor will provide administration of the project to include the following: 1. Provide monthly progress and status reports 2. Schedule and attend all necessary meetings coordinated with the State s Project Manager 3. Provide agendas and meeting minutes for all meetings relative to WRE 4. Provide timely copies of critical correspondences and project issue data 5. Coordinate activities with State District 6 staff via phone, , fax, and written correspondence 6. Submit invoices in a timely manner as prescribed in the Contract. 2.0 WRE DETAIL DESIGN (Activity Code 1141) The Contractor will conduct all activities necessary to analyze and design the hydraulic system within the project area. The Contractor will run quality checks of completed deliverables in accordance with the MnDOT s design Quality Management Plan (QMP). The project specific QMP must be developed in accordance with State s current QMP Manual, located at: All drainage areas (watersheds greater than 100 acres) and receiving waters (lakes, wetlands, rivers, streams, and county/judicial ditches) identified as a part of the preliminary environmental studies will be identified and considered. The Contractor will identify major water crossings and potential pond locations using USGS maps, aerial photography and preliminary design mapping provided by the State. Temporary drainage will be designed to facilitate the progression of 1

2 construction. The plan will also show the appropriate labels, direction of surface flow, and direction of water flow into the drainage structures. The analysis and designs will be prepared in accordance with the State s Drainage Manual and current Technical Memoranda (TM) utilizing GEOPAK Drainage, GEOPAK Site, State generated Microsoft Excel spreadsheets, HydroCAD or XP-SWMM, HY8 or CulvertMaster, and Microstation V8i. The work performed in this task must also be done in compliance with all applicable State Technical Memorandums. The Contractor will provide the following deliverables: Design Criteria Summary Prior to any work, the Contractor will submit a Water Resources Design Criteria Summary. The summary shall include all hydrology and hydraulic criteria to be used for City, County, and State roadways. The criteria should include the following drainage structures: ponds, catch basins, manholes, drop inlets, spread, storm sewer, culverts and ditches. The Contractor will submit written documentation on the pipe material to be used at each location and document the reason for the selected material. a) Storm Sewer Design The storm sewer design will follow the procedures in State s Drainage Manual, TM B-05, the Standard Specifications for Highway Construction, and State Aid Manual. The Contractor will be required to use State s spreadsheet format for both the catch basin spacing and the storm drainpipe computation sheets. All storm sewer will consist of concrete gasketed pipe and be located so future excavation will result in minimal traffic disruption of the mainline highway.. The drainage areas will be modeled with consideration of future development and increased runoff associated with development. The Contractor will develop drainage area maps for each storm drain inlet with pertinent data such as boundaries of the drainage area, runoff coefficients, time of concentration, and land use with design curve number. The drainage plan sheets will document the roadway cross slope and super elevations in accordance with State s standard plan. Water Resource Engineering (WRE) drainage plan sheets, related notes, tabulations, and specifications will be prepared according to State s latest sample plan and will be provided in a format that is easily transferable. (b) (c) Detention Pond Design When ponds are required, they will be designed utilizing HydroCAD, GEOPAK Site software packages, and Microstation V8i. Ponding may be required to address water quality, water quantity, and rate control issues. Water quality ponds must meet the National Pollution Discharge Elimination System (NPDES) and local water planning organization requirements. Pond locations and all applicable pond information will be developed and coordinated with the State Project Manager. The Contractor will develop a graphic display (both paper and electronic format) showing which areas are treated by each pond. The display must also show those areas not treated. Pond designs will be in accordance with the appropriate design parameters based on State requirements and/or applicable regulatory standards and sound engineering practice. All ponds will have an emergency spillway sized to carry events beyond the 100-year event and a minimum vertical freeboard above the 100-year flood elevations. Dead storage beneath the outlet invert elevation for water quality ponds must meet the National Pollutant Discharge Elimination System (NPDES) or local water planning organization requirements. All inlet and outlet details, skimmers and emergency spillway designs are to be included in the design. All flood routings determined by the Contractor and calculations will be submitted for review. The Contractor will perform special analysis for any ponds affected by significant environmental issues like hazardous waste or groundwater concerns and include all documentation in the submittal of deliverables. Culvert Design Culvert design will follow the same requirements as the storm sewer design listed above under Section 2.0 (a) Storm Sewer and will be designed in accordance with the Hydraulic Design Series No. 5, Hydraulic Design of Highway Culverts, September 1985 including future modifications and new editions thereof, unless otherwise specified. The Contractor will be required to utilize HY8 or CulvertMaster software. Centerline culverts will have case treatments designed to reduce frost 2

3 damage potential as required by Mn/DOT District 6 Soils and Materials Unit. A waterway analysis and risk assessment using State s form will be completed on centerline culverts larger than 48 inches. Culverts larger that 48 will require a special riprap basin design in accordance with Federal Highway Administration HEC No. 14, Third Edition, Hydraulic Design for Energy Dissipaters for Culverts and Channels, July The Contractor will prepare a drainage tabulation to be placed in a final construction plans, in accordance to the District 6 sample format.. (d) (e) (f) (g) (h) (i) (j) (k) Storm Water Pollution Prevention Plan (SWPPP) The Contractor will complete the SWPPP and related plan details, as required for the NPDES permit. The Contractor will prepare and submit to the State for review, signature, and agency submittal, application for the NPDES permit. Temporary Erosion/Sediment Control Plans The location and type of temporary erosion control devices that will be used to control project runoff and sediment during construction will be shown on the construction plans. The Best Management Practices (BMP) will be consistent with the Environmental Assessment (EA) and the plans and comply with Department of Natural Resources (DNR), Corp of Engineers (COE), and NPDES permit requirements. Turf Establishment and Permanent Erosion/Sediment Control The plan sheets will show the locations and types of permanent turf establishment in areas of construction disturbance and permanent erosion control devices. Erosion control will be developed in conjunction with State s construction personnel. The development efforts will be coordinated by the State s Project Manager. Existing Surface Drainage Tabulation A list of the type, size, location, and proposed construction impact of all drainage structures within the project limits, including removal quantities will be tabulated shown on the existing topography and utility plan sheets. The Contractor will also assemble list of applicable drainage-related Standard Plates. Proposed Surface Drainage Tabulation The tabulation will include a list of structure location, type, size, length, inlet and outlet elevations, slope, class, alternative structure types, case treatment, erosion control, riprap, granular backfill, and bedding for each proposed culvert. Tabulations will indicate acceptable pipe material alternatives in accordance with TM B-01. Proposed Storm Sewer Tabulation The tabulation will include a list of the location, structure designation, structure type, pay height, elevations (top of casting, pipe flow line at structure outlet and at inlet of downstream structure) casting assembly, pipe size, length, type and class, acceptable pipe material alternatives, aprons, top of casting, inlet and outlet elevations, pipe slope, steps, guide posts, turf establishment, riprap class and quantity. Also include casting assembly schedule. Proposed Storm Sewer Profiles Proposed Storm Sewer Profiles will be generated by GEOPAK Drainage and will show the hydraulic grade line, structure number, top-of-casting elevation, flow line elevation, pipe size, material class or gage, pay length and pipe slope. Hydraulic Drainage Reports The Contractor will prepare and submit a preliminary report documenting hydraulic analysis of the project as described in the Mn/DOT Drainage Manual, Section 1.4, and as required by the NPDES permit. Documentation of the water quality event, design event, and check storm event is required. The Contractor will submit a preliminary and final hydraulic report documenting hydraulic analysis of the project as described in the Mn/DOT Drainage Manual, Section 1.4, and as required by the 3

4 NPDES permit. Documentation of the water quality event, design event, and check storm event is required. The report will include drainage elements of the stage construction. The report will also include an evaluation of drainage effect on environmentally sensitive areas with the appropriate design controls provided in the plan. Electronic models utilized in hydraulic design and analysis will be included with hydraulic report documentation submittals. The CONTRACTOR will develop readily discernable drainage area maps for each storm drain, culvert, and control structure inlet with pertinent data such as boundaries of the drainage area, drainage area identifier, and peak runoff for design event. The CONTRACTOR will also develop major drainage area maps with the same data for existing conditions as well as proposed conditions and identify discharge points where runoff leaves the STATE highway rights-of-way. Hydraulic reports, drainage area maps, drainage models, and construction plans, and other drainage documentation will contain drainage area and structure labeling and other identifying information to provide direct correlation between drainage documents. The report will include: 1. Drainage elements of the stage construction. 2. An evaluation of drainage effect on environmentally sensitive areas with the appropriate design controls provided in the plan. 3. Electronic models utilized in hydraulic design and analysis will be included with hydraulic report documentation submittals. Submitted reports should include electronic software error messages including errors and hints. 4. The Contractor will also develop major drainage area maps with the same data for existing conditions as well as proposed conditions and identify discharge points where runoff leaves the STATE highway rights-of-way. 5. Drainage area map with readily discernible information for each storm drain, culvert, and control structure inlet with pertinent data such as boundaries of the drainage area, drainage area identifier, and peak runoff for design event. 6. Hydraulic reports, drainage area maps, drainage models, and construction plans, and other drainage documentation will contain drainage area and structure labeling and other identifying information to provide direct correlation between drainage documents. Prepare a final report based on comments for the various reviewers. 7. The Contractor will submit a change log report with each subsequent plan submittal. The change log will document decisions made between plan submittals and identify all hydraulic related modifications made to the plan since the previous submittal. 3.0 SURVEYING (Activity Code 1040) The State will furnish previously completed Digital Terrain Mapping (DTM) files, survey control point information, Geometric Layout and other electronic files that were used as the basis for preliminary design. The Contractor will review survey data information supplied by the State and will run quality checks in accordance with the project specific QMP. The Contractor will review the supplied survey information and will identify where supplementary survey work is required to complete the design deliverables, acquire additional data/information in coordination with the State s Project Manager. 1. Mapping and surveys will be delivered in English units (NAD adjustments for horizontal datum and NAVD 88 for the vertical datum). 4

5 4.0 State s Deliverables Exhibit A Mn/DOT Contract No Mn/DOT's Surveys Office will provide existing mapping, right of way, and topography in the same format. 3. State has established horizontal and vertical control points to be used in the field. 4. State will provide horizontal and vertical control information to Contractor in electronic and hard copy formats at kick-off meeting. 5. State will furnish previously completed DTM files, planimetric mapping, survey control point information, geometric layout, proposed alignments and other data used for preliminary design. Files will be delivered in English units (NAD adjustments for horizontal datum and NAVD 88 for the vertical datum) and will conform to standards and requirements for Contractor deliverables under this Contract. The State will provide the following: 4.1 Provide project oversight and direction for the Contractor. 4.2 Review and approve submittals in a timely manner. 4.3 Furnish copies of pertinent project correspondence and project data. 4.4 Attend key project meetings. 4.5 Digital orthographic photography and preliminary mapping to be provided by the State 4.6 Detailed construction plan sheets of the project providing information on the location of items such as roadways, shoulders, radii, turn lanes, acceleration lanes, driveways, curb and gutter, tapers, right-ofway, railroad property, easements, obliterations, station equations, fencing, etc. 4.7 Electronic Data: roadway alignment, existing topography, proposed geometrics, existing drainage survey, superelevation shapes, GEOPAK Coordinate Geometry database, proposed cross-sections, and existing ground tin files. 4.8 Existing and proposed impervious areas 4.9 Request for NPDES permit 4.10 Existing surveys information 5.0 Contractor s Deliverables The Contractor will provide all surface drainage plans, pond designs, erosion control plans (temporary and permanent), SWPPPs, and any supporting calculations required for conformance with Mn/DOT standards. The deliverables will be in conformance with the State s Drainage Manual and will include the following: 5.1 Water Resources Design Criteria Summary 5.2 Storm Sewer System Design Plans 5.3 Detention Pond Design Plans 5.4 Culvert Designs Plans 5.5 SWPPP 5.6 Temporary Erosion/Sediment Control Plans 5.7 Turf Establishment and Permanent Erosion/Sediment Control Plans 5.8 Existing Surface Drainage Tabulation 5.9 Proposed Surface Drainage Tabulation 5.10 Proposed Storm Sewer Tabulation 5

6 5.11 Detailed hydraulic construction plan sheets of the project providing all WRE features 5.12 Coordinate proposed storm sewer locations with City water and sanitary sewer utility reconstruction Final Drainage Report in paper and electronic format, including hydraulic models, catch basin spacing reports, drainage area map, and BMP design as required List of MnDOT Standard Plates utilized in plans 5.15 Final cost estimate for drainage facilities 5.16 Review existing surveys information for additional surveys needs Milestones for submittal of detailed WRE construction plan sheets and documents for review and approval as follows: 1. Detail Design (60% Complete) The Contractor will submit five (5) sets of prints and 1 PDF version of the proposed WRE Construction Plan. The State will complete review and comment on this submittal within 10 working days of the submittal date. The Contractor will make a single iteration of revisions required by State staff. Multiple iterations of revisions are not included in this task. 2. Detail Design (95% Complete) The Contractor will submit five (5) sets of prints and 1 PDF version of the proposed WRE Construction Plan, five (5) copies of the Special Provisions and the Engineer s Construction Cost Estimate, and two (2) copies of the Permits for the State s Review and Comment. The State will complete review and comment on this submittal within 10 working days of the submittal date. Selected sheets will be sent to STATE s Central Office for preparation of necessary Agreements. The Contractor will make a single iteration of revisions required by State staff. Multiple iterations of revisions are not included in this task. 3. Construction Plan (100% Complete) The Contractor will submit five (5) sets of prints for the proposed Construction Plan, (5) copies of the Special Provisions and the Engineer s Construction Cost Estimate and five (5) copies of the Permits. The State will complete review and comment on this submittal within 10 working days of the submittal date. The Contractor will make a single iteration of revisions required by State staff. Multiple iterations of revisions are not included in this task. Upon making the revisions to the 100% WRE Construction Plan submittal, the Contractor will submit one signed and certified set of bond prints with the vellum title sheet, and five (5) additional copies. The original prints will be submitted to District 6 or Bridge Office as set forth in SEC PLAN TURN-IN AND SUPPORT. The STATE s Central Office Design Liaison Unit will make a final review and comment on the certified Construction Plan. Upon making the revisions requested by State s Central Office Design Liaison Unit, the Contractor will submit new signed and certified sheets, as necessary. An electronic copy of the project s Geopak design files (.gpk) and each sheet in Microstation V8i format will be submitted. One copy of the design computations and quantity calculations will also be submitted. 6

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