HYDINFRA -- Mn/DOT’s
Hydraulic Infrastructure Database
and
Illicit Discharge Inspection
Bonnie Peterson,
HYDINFRA Coordinator
Mn/DOT Bridge Hydraulics
HYDINFRA
is Mn/DOT’s
Hydraulic Infrastructure Database
HYDINFRA’s Purpose:
Manage information about storm drainage
system components, including:
Pipes
Hydraulic Structures
Special Hydraulic Structures
Ponds
Structural Pollution Control Devices (SPCDs)
Ditches
Outfalls
Illicit Discharge
MS4 changes to HYDINFRA:
Ponds, SPCDs and Ditches
Outfalls and Illicit Discharge Inspection
Inputs for Mn/DOT’s
Illicit Discharge Data Development:
AMEC/Bonestroo’s Illicit Discharge Data
Form for Mn/DOT Metro’s MS4 Permit
CWP’s IDDE Guidance Manual
MS4 Permit, Page 9
MS4s must develop, implement and enforce a
program to detect and eliminate illicit discharges
(with bmps and goals):
With a storm sewer map that has:
– Ponds, streams, lakes, wetlands in our system
– SPCDs in our system
– All Pipes with 24” diameter at minimum but “all conveyances” is
requested.
– Outfalls – outlets to others’ storm systems (not diffuse flow)
Prohibit non-stormwater discharges and enforce.
Program to “detect non-stormwater discharges including dumping”
Inform employees, business and public of hazards of improper waste
disposal and illegal discharge.
(Other mostly clean waters sources are not included unless identified
as a problem. Residential car washing, street washing and fire-fighting
water plus cleaner water sources aren’t included in illicit discharge.)
MS4 Permit Requirements for Illicit Discharge, pg 9 of permit
Illicit Discharge
is a discharge or deposit of
polluting materials, liquid or solid,
that can be transported to natural
waterways.
How Mn/DOT is Inspecting for
Illicit Discharges
HYDINFRA Inspectors
Student Workers
Maintenance People
Consultants
Long-Term HYDINFRA
Inspectors
Illicit Discharges to Mn/DOT:
Look for:
– Unexpected pipes coming into the highway
storm drain system.
– Pipes flowing when storm drains shouldn’t
be.
HYDINFRA can also record deposits of
dumped or otherwise deposited polluting
materials.
Trimble GPS Units
If Mn/DOT Inspectors find an
Illicit Discharge:
Report it to Area Maintenance Supervisor
within 24 hours for follow-up.
Accidental chemical spills by trucks are not
reported as Illicit Discharge, but are logged
by Dispatch and forwarded to MPCA Duty
Officer and cleaned up by trucking
company’s contractor. Mn/DOT
Maintenance does emergency
containment.
HYDINFRA
and
Illicit Discharge
Record Keeping
HYDINFRA
Database
Data Access
Methods
Oracle Server
Forms
Reports
ArcView GIS
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HYDINFRA Features, located with GPS,
plotted on FSA Aerial Photo in ArcView
Illicit
Discharge
Data in
HYDINFRA
End