state of connecticut department of transportation stormwater management plan connecticut department...

State of ConnecticutState of ConnecticutDepartment of Department of TransportationTransportation

Stormwater Stormwater Management PlanManagement Plan

CONNECTICUT DEPARTMENT OF

TRANSPORTATION

Bureau of Policy and Planning

Cynthia S. HoldenTransportation Assistant Planning Director

2800 Berlin Turnpike

P.O. Box 317546

Newington, CT 06131-7546

Phone: (860) 594-2922

Fax: (860) 594-3028

Email: [email protected]

Status of Phase 1 and Status of Phase 1 and Phase 2Phase 2

Phase 1Phase 1 Phase 2Phase 2 Phase 1 vs. Phase 2Phase 1 vs. Phase 2 Municipality’s RoleMunicipality’s Role Department of Environmental Department of Environmental

Protection’s RoleProtection’s Role

COVERAGECOVERAGE

SWMP will cover:SWMP will cover: – All of Department’s highways, All of Department’s highways,

roadways and railways located within roadways and railways located within urbanized areas urbanized areas

– All interstates regardless of locationAll interstates regardless of location 3732 miles of state maintained 3732 miles of state maintained

highways and roads (18% of total)highways and roads (18% of total)

COVERAGECOVERAGE continued continued

State covers 5554 square miles, 161 State covers 5554 square miles, 161 square miles of inland water, and 5385 square miles of inland water, and 5385 square miles of coastal water undersquare miles of coastal water under

169 municipalities - regulated by the 169 municipalities - regulated by the Department of Environmental ProtectionDepartment of Environmental Protection

Old New England state - long history, Old New England state - long history, little record of storm drainagelittle record of storm drainage

Strategy to ImplementStrategy to Implement Preparation of SWPP Plan Preparation of SWPP Plan - By Consultant- By Consultant Minimum Control MeasuresMinimum Control Measures - Department - Department

defines appropriate BMP’s, designates a defines appropriate BMP’s, designates a person(s) and job title responsible for person(s) and job title responsible for each BMP, defines a timeframe for each BMP, defines a timeframe for implementation for each BMP, defines implementation for each BMP, defines measurable goals for each BMP. - measurable goals for each BMP. - Prepared and implemented by consultant, Prepared and implemented by consultant, Department, contractors and the publicDepartment, contractors and the public

Cost to Prepare and Implement ProgramCost to Prepare and Implement Program

Cost to Implement Cost to Implement ProgramProgram

Preparation of Stormwater Preparation of Stormwater Management Plan - $450,000.00Management Plan - $450,000.00

Preparation of Mapping - Preparation of Mapping - $1,800,000.00$1,800,000.00

Update Mapping Annually - Update Mapping Annually - $450,000.00$450,000.00

Annual Maintenance and Design Costs Annual Maintenance and Design Costs - $9,000,000.00 - $10,000,000.00- $9,000,000.00 - $10,000,000.00

Illicit Discharge Detection and EliminationIllicit Discharge Detection and EliminationTable 3.1 Storm Sewer Map BMPTable 3.1 Storm Sewer Map BMP

Measurable Goals and Implementation DatesMeasurable Goals and Implementation Dates

Year 1 Acquire initial 25% of base mapping (AerialPhotogrmtry)Perform initial 10% of Field Data CollectionPurchase workstation and software

Bureau ChiefArthur W. Gruhn

Year 2 Acquire 25% of base mapping (Aerial Photogrmtry)Perform 22% of Field Data CollectionModify and maintain database (GIS)


Year 3 Acquire 25% of base mapping (Aerial Photogrmtry)Perform 22% of Field Data CollectionModify and maintain database (GIS)


Year 4 Acquire final 25% of base mapping (AerialPhotogrmtry)Perform 23% of Field Data CollectionModify and maintain database (GIS)


Year 5 Perform final 23% of Field Data CollectionModify and maintain database (GIS)


Year 6and 7

Continue compiling GIS information/preparing map(s) Bureau ChiefArthur W. Gruhn

Year 8 Complete initial layout of storm sewer system map Bureau ChiefArthur W. Gruhn

Table 3.2 Detection and Elimination Table 3.2 Detection and Elimination Program BMPProgram BMP

Measurable Goals and Implementation DatesMeasurable Goals and Implementation Dates

Target Date Activity PositionResponsible

Year 1 Purchase Monitoring EquipmentPersonnel trainingSelect outfalls to be tested in Year 2


Year 2 Begin outfall monitoring4 outfalls tested (4 per District 2; 1 perADT type)


Year 3 8 outfalls tested (4 per District 2 & 4; 1per ADT type)


Year 4 12 outfalls tested (4 per District 1,2 &4; 1 per ADT type)


Year 5 16 outfalls tested (4 per District 1,2,3& 4; 1 per ADT Type)


Construction Site Runoff ControlConstruction Site Runoff ControlTable 4.1 Requirements and Guidelines for Table 4.1 Requirements and Guidelines for

Erosion and Sediment Controls BMPErosion and Sediment Controls BMPMeasurable Goals and Implementation DatesMeasurable Goals and Implementation Dates

Target Date Activity PositionResponsible

Year 1 Revise Consultant Engineer’s Manual, DrainageManual and Standard Specifications toImplement 1 Acre Disturbance Treshold


Year 2-5 Continue Requirements and Guidelines forErosion and Sediment Controls on all Projects


Pollution Pollution Prevention/Good Prevention/Good

HousekeepingHousekeeping

Operation and Maintenance Operation and Maintenance ProgramProgram

Employee Training ProgramEmployee Training Program Street Sweeping ProgramStreet Sweeping Program Catch Basin Maintenance ProgramCatch Basin Maintenance Program Preventative Maintenance ProgramPreventative Maintenance Program

Uniqueness of Uniqueness of Connecticut’s SWMPConnecticut’s SWMP

Coverage - ExtensiveCoverage - Extensive Mapping - 8 years to completeMapping - 8 years to complete Illicit discharge testing - by district, by Illicit discharge testing - by district, by

ADT, 4 tests vs. 3 testsADT, 4 tests vs. 3 tests 15-inch outfall and greater15-inch outfall and greater Catchbasin rule, 15” pipeCatchbasin rule, 15” pipe Catchbasin prior to municipality system Catchbasin prior to municipality system

into state systeminto state system

Design and Design and Maintenance IssuesMaintenance Issues

Sediment basins in tidal zonesSediment basins in tidal zones Design 50% complete before drainage Design 50% complete before drainage

design starteddesign started Best available technologies - 0.1% used Best available technologies - 0.1% used

because numbers are not availablebecause numbers are not available Maintenance of systems not funded by Maintenance of systems not funded by

fedsfeds Reduction of sediment on roads equals Reduction of sediment on roads equals

more salt, less sand - more complaints of more salt, less sand - more complaints of contaminated wellscontaminated wells

Design and Design and Maintenance Issues Maintenance Issues

continuedcontinued Coordination between Design, Coordination between Design,

Maintenance OfficesMaintenance Offices StaffingStaffing Time FrameTime Frame Record KeepingRecord Keeping Consistency with MunicipalitiesConsistency with Municipalities

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