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Tatamy Borough Overview
Tatamy Borough, PA Code of Ordinances
TATAMY BOROUGH, PENNSYLVANIA CODE OF ORDINANCES
ADOPTING ORDINANCE
TITLE I: GENERAL PROVISIONS
TITLE III: ADMINISTRATION
TITLE V: PUBLIC WORKS
TITLE VII: TRAFFIC CODE
TITLE IX: GENERAL REGULATIONS
TITLE XI: BUSINESS REGULATIONS
TITLE XIII: GENERAL OFFENSES
TITLE XV: LAND USAGE
TABLE OF SPECIAL ORDINANCES
PARALLEL REFERENCES
APPENDIX C-4: RUNOFF COEFFICIENTS FOR THE RATIONAL METHOD
Runoff Coefficients for the Rational Method*
Hydrologic Soil Group and Slope Range**
Land Use
A
B
C
D
0—2 %
2—6 %
6%+
0—2 %
2—6 %
6%+
0—2 %
2—6 %
6%+
0—2 %
2—6 %
6%+
Runoff Coefficients for the Rational Method*
Hydrologic Soil Group and Slope Range**
Land Use
A
B
C
D
0—2 %
2—6 %
6%+
0—2 %
2—6 %
6%+
0—2 %
2—6 %
6%+
0—2 %
2—6 %
6%+
CultivatedA
a0.18
0.23
0.28
0.24
0.29
0.33
0.30
0.34
0.38
0.33
0.37
0.41
b0.2 3
0.29
0.34
0.30
0.36
0.40
0.36
0.41
0.45
0.39
0.44
0.48
Forest, woods
0.03
0.05
0.08
0.11
0.16
0.20
0.20
0.25
0.29
0.25
0.30
0.34
0.04
0.08
0.12
0.15
0.21
0.26
0.25
0.31
0.36
0.31
0.37
0.41
Gravel
0.24
0.29
0.33
0.32
0.36
0.40
0.35
0.39
0.43
0.37
0.41
0.44
0.30
0.36
0.40
0.38
0.43
0.47
0.42
0.46
0.50
0.44
0.48
0.51
Meadow, lawnC
0.05
0.08
0.12
0.15
0.20
0.24
0.23
0.28
0.32
0.28
0.32
0.36
0.07
0.12
0.17
0.19
0.25
0.30
0.28
0.34
0.39
0.33
0.39
0.43
Parking, other impervious
0.85
0.86
0.87
0.85
0.86
0.87
0.85
0.86
0.87
0.85
0.86
0.87
0.95
0.96
0.97
0.95
0.96
0.97
0.95
0.96
0.97
0.95
0.96
0.97
PastureB
0.09
0.13
0.17
0.19
0.24
0.29
0.27
0.31
0.36
0.31
0.35
0.39
0.12
0.17
0.23
0.24
0.30
0.36
0.33
0.38
0.43
0.37
0.42
0.46
Residential, commercial, industrial and other “developed”
Runoff coefficients should be calculated based upon weighted average of impervious area coefficients and pervious area coefficients from above based upon soil type, slope and the particular development proposal
*   Coefficients for all land uses except parking and other impervious cover are based on the Rossmiller Equation for translating NRCS curve number into Rational Method ‘c’ values. The source for the parking and other impervious cover coefficients is RAWLS. W.J., S.L. WONG and R.H. McCUEN, 198. Comparison of urban flood frequency procedures. Preliminary draft report prepared for the Soil Conservation Service, Beltsville. MD.
**   Hydrologic soil group based on the county soil survey latest edition
a   Runoff coefficients for storm recurrence intervals less than 25 years
b   Runoff coefficients for storm recurrence intervals of 25 years or more
A   Represents average of cultivated land with and without conservation treatment from TR-55, January 1975. These values are consistent with several categories of cultivated lands from TR-55, June 1986
B   Represents grasslands in fair condition with 50% to 75% grass cover
C   Represents grasslands in good condition with greater than 75% grass cover
 
(Ord. 226-2007, passed 5-7-2007)

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