To support essential travelers during the COVID-19 public health crisis, CTDOT has launched a temporary program for food trucks to operate at highway Rest Areas in Danbury (I-84), Middletown (I-91), Wallingford (I-91) and North Stonington (I-95). Read more here: Food Trucks Temporarily Permitted at CTDOT Highway Rest Areas

Drainage Manual Chapters 1 thru 5

Appendix C - In-House Development of Hydraulic Requirements for Crossings Conveying a Waterway Greater Than 2.59 km2 (1 mi2)
Chapter 1
Introduction Background, Overview,  Manuals and Computer Programs, Metric Conversion  References 
User Instructions Updates,  Consultant Engineers, 
Hydraulic Engineer Approval, ConnDOT Highway Encroachment Permit,  Major Traffic Generators,  Abbreviations 
General Hydraulic Design Practices   Hydrologic Analysis, Hydraulic Analysis, Engineering Evaluation , ConnDOT "Standard Engineering Practice" 
Construction Considerations
Maintenance Considerations
Documentation Definition, Purpose, Types,Scheduling, Standard Practices 
Appendix A Drainage Manual Comment Form
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Chapter 2
Legal Aspects  Overview Introduction, Order Of Authority, Related Publications 
Federal Laws General Laws, Drainage, Constitutional Power, Fish And Wildlife Service, Executive Orders 
National Flood Insurance Program Flood Disaster Protection Flood Insurance, Local Community NFIP Maps, Coordination With FEMA, Consistency With Floodways, Revisions Of Floodway, Data For Revisions  Allowable Floodway Encroachment 
State Drainage Law Origin of Law, Common Law, Statutory Law, Precedence of Law, Classification Of Waters
State Water Rules Basic Concepts, Surface Waters, Stream Waters, Flood Waters
Statutory Law Introduction, Eminent Domain, Drainage Statutes, Water Rights, Environmental Law, Sewage Draining into Highway Area
Local Laws 
Role Of The Designer Responsibility, Investigating Complaints, Legal Opinion, Witness Obligation
References 
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Chapter 3
Design Development Overview, Purpose, Project Development 
Permit Determination
Scope Review Meeting
Drainage Design Development at the Preliminary Design Phase for Roadway Projects General, Preliminary Design Statement, Preliminary Plans, Watercourses, Permits, Fish Passage, Watershed Area Maps, Unusual Designs/Special Provisions
Hydraulic Design Development for Structure Type Studies General, Procedure, Submissions
Drainage/Semifinal Submission General, Resolution of Previous Drainage Comments, 
Condition Survey, Drainage Computations, Right of Way Involvement, Culverts, Outlet Protection, Drainage Patterns, Grading Plans, Permits, Temporary Drainage, Meetings
Final Plans for Review Submission (Roadways and Structures) General, Resolution of Previous Drainage Comments, Drainage Report and Plans, Permits, Structures, Final Structure Plans, Environmental Permit Aspects
Process for Design of Culverts (State Design) 
Hydraulic Design Process with Hydraulics and Drainage Performing the Design (Structures) General 
Drainage Guidelines for Resurfacing Projects General, Adequate Cross Slope for Proper Drainage, Modifications to the Existing Drainage System, Drainage Computations, Existing Problems or Concerns
Permit Requirements General, Floodplain Management Certification, Stream Channel Encroachment Line Permit, Water Diversion Permits, Dam Safety Permits
References
Appendix A - Pre-Submission Quality Assurance/Control Guideline
Appendix B - Submission Check List
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Chapter 4
Culvert Repair, Materials, and Structural Design Introduction, Overview of the Problem, Construction Projects with Existing Drainage Facilities, Basic Characteristics, Types of Culverts, General Problems with Culverts, Need for Economical Methods of Repair and Replacement
Structural Design of Culverts Introduction, Loads, Flexible Culvert Behavior, Rigid Culvert, Behavior, Durability, Economic Considerations, Maintenance
Safety, Geotechnical
Culvert Shapes General, Circular Pipes, Pipe Arch and Elliptical Shapes, Arches, Box Sections, Multiple Barrels
Culvert Materials General, Concrete, Corrugated Steel, Corrugated Aluminum, Plastic, Other Materials, Coatings for Culvert Materials
Culvert Construction
General, Culvert Installation Methods 
ConnDOT Culvert Material Requirements Introduction, Reinforced Concrete Pipe (RCP), Corrugated Metal Pipe (CMP), Corrugated Structural Plate Pipe (CSPP), 
Corrugated Polyethylene Pipe (CPP), Polyvinyl Chloride (PVC), Special Connections, Railroad Crossings, Airports
References 
Appendix A - Culvert Inspection Guideline
Appendix B - Drainage Facility Condition Surveys Guideline
Appendix C - High Density Polyethylene Pipe (HDPE) Guideline 
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Chapter 5
Data Collection Introduction, Drainage Reconnaissance, Sources of Data
Watershed Characteristics Area, Slopes, Land Use, Streams, Rivers, Ponds, Lakes and Wetlands, Environmental Considerations, Geological Considerations
Site Characteristics Introduction, Roughness Coefficients, Stream Profile, Stream Cross-Sections, Existing Structures, Acceptable Flood Levels, Flood History, Debris and Ice, Scour Potential, Controls Affecting Design, Downstream Control, Upstream Control, Survey Requirements, Field Review
Data Evaluation Objective, Evaluation, Sensitivity
References
Appendix A - Sources of Data