Rhode Island Code of Regulations › Title 290 - Department of Transportation › Chapter 20 - Government and Utilities › Subchapter 00 - N/A › Part 4 - State Highway Right of Way Regulations › Section 290-RICR-20-00-4.15 - Stormwater

Current through June 14, 2024
A. It shall be unlawful for any person, firm
							or corporation to make any connection into a State road drainage system, or to
							drain or pump water onto the traveled surface of a State Highway without first
							obtaining written permission from the Director of the Department.
B. When the Permittee intends to grade their
							property towards the State highway, the Permittee shall make provision, at
							their own expense, for disposition of highway and/or site drainage by
							installing pipe, inlets, catch basins, manholes, headwalls and ditches of
							proper size and material as may be necessary, in the Department's
							determination, to protect the State's drainage rights.
C. Any Permittee making a direct connection
							to the State Highway drainage system shall clean, inspect and repair as
							necessary, that part of the State Highway drainage system (all assets) as part
							of the Permit work. These direct connection applications shall treat 50% of the
							water quality volume, at a minimum.
D. Where the construction of a driveway
							necessitates crossing a State Highway drainage ditch, a culvert pipe shall be
							installed in the ditch by the Permittee at their own expense. The culvert shall
							be no less than twelve inches in diameter, and of sufficient size to carry the
							stormwater runoff from a twenty-five (25) year storm, as determined by the
							National Oceanic and Atmospheric Administration, for the watershed area. Under
							no circumstances shall existing ditches, swales or gutters be filled without
							adequate alternate provisions for drainage being made and approved through
							application for and issuance of a Permit.
E. The Applicant, in the case of commercial
							applications, is required to submit detailed computations and site-grading
							plans for drainage conditions existing and proposed when applying for a Permit.
							These computations should be made considering a storm of twenty-five (25) -
							year frequency with a duration equal to the time of concentration. These
							computations and plans shall be approved and stamped by a Rhode Island
							Registered Professional Engineer. If storm drainage will not affect the State
							Highway drainage system, a statement of no impact should be submitted with a
							Application approved and stamped by a Rhode Island Registered Professional
							Engineer, or a Rhode Island Registered Land Surveyor when the property in
							question is graded away from the State Highway drainage system.
F. Drainage Appurtenances - All facilities,
							pipes, drains, catch basins, manholes and other appurtenances will be as
							indicated in "Rhode Island Department of Transportation, Standard
							Details."
G. The applicant shall be
							responsible to show no increase to peak flow and total volume of run off from
							existing conditions entering the State Highway drainage system in a twenty-five
							(25) year storm, unless in the case of total volume the applicant can
							demonstrate unconditionally that there will be no impact to the receiving
							[water] body(ies). In addition, if a connection to the State Drainage System is
							proposed, the applicant shall address water quality impacts through
							incorporation of Structural Stormwater Treatment Practices and through the use
							of Best Management Practices (BMPs). Design and construction of all stormwater
							mitigation shall be in accordance with the Rhode Island Department of
							Environmental Management's "Stormwater Design and Installation Standards
							Manual"
H. No activities that
							result in the exposure of soils shall occur prior to the installation of all
							proper Soil Erosion and Sediment Control (SESC) plans and procedures.
I. Consideration and care shall be made
							during the site planning and development process to locate dumpsters and other
							potential sources of pollutants so that any effluent from these assets is not
							directed into the State Highway drainage system.