(a) Any person or entity having been determined to violate this chapter or who enters a plea to a violation thereof shall be guilty of a minor misdemeanor. Each day such violation continues shall constitute a separate offense.
(b) The imposition of any fine or penalty pursuant to this chapter shall not preclude the Law Director from instituting any appropriate legal proceeding and pursuing any and all available legal remedies in a Court of proper jurisdiction to correct or abate a violation, require compliance with this chapter or other applicable chapters, ordinances, regulations or rules of the Municipality or State of Ohio as determined to be appropriate by the Law Director.
(Ord. 08-021. Passed 4-14-08.)
TABLE E
ACCEPTABLE METHOD OF CALCULATION
DRAINAGE AREA (ACRES) | STORMWATER QUANTITY | ||||
PEAK DISCHARGE ONLY | PEAK DISCHARGE AND TOTAL RUNOFF VOLUME | STORAGE VOLUME | |||
HOMOGEN. LAND USE | NON- HOMOGEN. | HOMOGEN. | NON- HOMOGEN. | ||
LESS THAN 200 | RATIONAL OR PEAK DISCHARGE | PEAK DISCHARGE | (*)TABULAR HYDRO- GRAPH | GRAPHICAL | (*) STORAGE- INDICATION |
200 TO 300 | PEAK DISCHARGE | ||||
GREATER THAN 300 | (*) TABULAR HYDROGRAPH | (*)STORAGE-INDICATION | |||
*Note: The “Tabular Hydrograph” and “Storage-indication” methods are preferred and are normally used to check drainage calculations submitted to the Engineer
Method References:
Rational: (Q = CIA); M.O.R.P.C., Stormwater Design Manual, 1977
Graphical: Ibid., Pg. 143
Peak Discharge: U.S. Department of Agriculture, Soil Conservation Service, Urban Hydrology for Small Watersheds, Technical Release No. 55, 1986
Storage – Indication: M.O.R.P.C., Stormwater Design Manual, 1977, Pg. 143.
SCS TR-20 and US Army COE’s HEC-1
Tabular Hydrography: SCS TR-55, Chap. 5
SCS TR-20
US Army COE’s HEC-1
USGS regression equations for Central Ohio may be used, where applicable, for estimating peak flows for culvert design and to estimate peak release rates.
TABLE F
DESIGN COEFFICIENT FOR ROADWAY CULVERTS
TYPE STRUCTURE | MANNING’S ROUGHNESS COEFFICIENT (N) | ENTRANCE LOSS COEFFICIENT (Ke)* |
CONCRETE PIPE | 0.013 | 0.2 |
BOX: 4-sided BOX: 3-sided | 0.013 weighted by wetted perimenter- minimum 0.018 | 0.2 TO 0.5 0.2 TO 0.5 |
SLAB TOP | 0.03 TO 0.05 | 0.2 TO 0.5 |
* As a function of the headwall configuration.
RUNOFF COEFFICIENTS
Average values of developed runoff for various types of developments | ||
(General Slope) | ||
(Less Than) | (More Than) | |
2% | 7% | |
Unimproved areas | 0.20 | 0.30 |
Parks and Cemeteries | 0.10 | 0.25 |
Playgrounds | 0.20 | 0.35 |
Residential | ||
Suburban | 0.40 | 0.40 |
Single-family | 0.40 | 0.40 |
Multi-family | 0.50 | 0.70 |
Apartments | 0.60 | 0.80 |
Commercial | 0.80 | 0.95 |
Industrial | ||
Light | 0.50 | 0.80 |
Heavy | 0.60 | 0.90 |