Dingman Township

Dingman Township

Pike County, Pennsylvania

Appendices to the Sawkill Watershed Management Ordinance

^{APPENDIX A

LIST OF RELATED REGULATIONS, CODES,
AND ORDINANCES

A.1
Subdivision/Land Development Ordinance No. 13^{Enacted April 30, 1970, as amended}
A.2      Zoning
Ordinance No. 18 ^{Enacted September 3,
1974, as amended}
A.3      Floodplain
Management Regulations No. 59   ^{Enacted
July 1, 1986, as amended}
A.4      Road
Encroachment Ordinance No. 19   ^{Enacted
October 1, 1974, as amended}
A.5      Building Code
No. 16   ^{Enacted July 2, 1974, as amended}

APPENDIX B.1

STANDARD SCS
24-HOUR, TYPE II DISTRIBUTION
CUMULATIVE
RAINFALL TABLE

(REVISED MAY 1982)

Time Increment = 15 minutes (0.25
hour)}

^0.0000 ^0.0020 ^0.0050 ^0.0080 ^0.0111

^0.0140 ^0.0170 ^0.0200 ^0.0230 ^0.0260

^0.0290 ^0.0320 ^0.0350 ^0.0380 ^0.0410

^0.0440 ^0.0480 ^0.0520 ^0.0560 ^0.0600

^0.0640 ^0.0680 ^0.0720 ^0.0760 ^0.0800

^0.0850 ^0.0900 ^0.0950 ^0.1000 ^0.1050

^0.1100 ^0.1150 ^0.1200 ^0.1260 ^0.1330

^0.1400 ^0.1470 ^0.1550 ^0.1630 ^0.1720

^0.1810 ^0.1910 ^0.2030 ^0.2180 ^0.2360

^0.2570 ^0.2830 ^0.3870 ^0.6630 ^0.7070

^0.7350 ^0.7580 ^0.7760 ^0.7910 ^0.8040

^0.8150 ^0.8250 ^0.8340 ^0.8420 ^0.8490

^0.8560 ^0.8630 ^0.8690 ^0.8750 ^0.8810

^0.8870 ^0.8930 ^0.8980 ^0.9030 ^0.9080

^0.9130 ^0.9180 ^0.9220 ^0.9260 ^0.9300

^0.9340 ^0.9380 ^0.9420 ^0.9460 ^0.9500

^0.9530 ^0.9560 ^0.9590 ^0.9620 ^0.9650

^0.9680 ^0.9710 ^0.9740 ^0.9700 ^0.9800

^0.9830 ^0.9860 ^0.9890 ^0.9920 ^0.9950

^0.9980 ^1.0000 ^1.0000 ^1.0000 ^1.0000

^{APPENDIX B.3

STORM INTENSITY-DURATION-FREQUENCY
CURVES FOR REGION 4}

Stormwater intensity by duration curve

^{RUNOFF
COEFFICIENTS FOR THE RATIONAL METHOD}

^{Type of
Surface Normal Range}

^{Recommended
Value}

^{Pavement:
Concrete or Bituminous Concrete}
^{0.75 – 0.95
0.90}

Pavement:^{Bituminous Macadam or Surface Treated Gravel} ^{0.65 – 0.80
0.75}

^{Sandy Soil:
Cultivated or Light Growth} ^{0.15 – 0.30
0.20}

Sandy Soil:   ^{Cultivated or Light Growth
Woods or Heavy Brush} ^{0.14 – 0.30
0.20}

^{Clay Soil:
Bare or Light Growth} ^{0.35 – 0.75
0.50}

Clay Soil:   ^{Woods or Heavy Growth} ^{0.25 – 0.60
0.40}

^{Mixed:
Industrial/Commercial} ^{0.70 – 0.95
0.90}

Mixed: ^{Moderate Density Residential} ^{0.50 – 0.70
0.65}

^{Low Density
Residential} ^{0.35 – 0.60
0.45}

^{Rural Areas,
Parks, Golf Courses} ^{0.15 – 0.30
0.25}

Appendix B.4

MANNING’S EQUATION

^{^{Appendix B.5}

^{Manning Values Table}

^{^{^{MANNING
“n” VALUES}}}

^{SURFACE
n}

^{Uncoated cast-iron
pipe}

^{^0.013}

^{Coated cast-iron
pipe}

^{^0.012}

^{Commercial
wrought-iron pipe, black}

^{^0.013}

^{Commercial
wrought-iron pipe, galvanized}

^{^0.014}

^{Smooth brass and
glass pipe}

^{^0.010}

^{Smooth lockbar and
welded “OD” pipe}

^{^0.011}

^{Riveted and spiral
steel pipe}

^{^0.015}

^{Vitrified sewer
pipe}
^{^0.013}

^{Common clay
drainage tile}
^{^0.012}

^{Glazed brickwork}
^{^0.013}

^{Brick in center
mortar; brick sewers}
^{^0.015}

^{Neat cement
surfaces}
^{^0.011}

^{Cement mortar
surfaces}
^{^0.013}

^{Concrete pipe}
^{^0.012}

^{Concrete pipe}
^{^0.012}

^{Wood stove pipe}
^{^0.011}

^{Plank flumes:
Planed}
^{^0.012}

^{Plank flumes:
Unplaned}
^{^0.013}

^{Plank flumes: With
battens}
^{^0.015}

^{Concrete-lined
channels}
^{^0.014}

^{Cement-rubble
surface}
^{^0.020}

^{Dry-rubble surface}
^{^0.030}

^{Dressed-ashlar
surface}
^{^0.014}

^{Semi-circular
metal flumes, smooth}
^{^0.012}

^{Semi-circular
metal flumes, corrugated}
^{^0.025}

^{Canals and
ditches: Earth, straight and uniform}
^{^0.025}

^{Canals and
ditches: Rock cuts, smooth and uniform}
^{^0.033}

^{Canals and
ditches: Rock cuts, jagged and irregular}
^{^0.040}

^{Canals and
ditches: Winding sluggish canals}

^{^0.025}

^{Canals and
ditches: Dredged earth channels}

^{^0.0275}

^{Canals and
ditches: Canals with rough stony beds, weeds on
earth banks}
^{^0.035}

^{Canals and
ditches: Earth bottom, rubble sides}
^{^0.030}

^{Natural stream
channels: (1) Clean, straight bank, full stage,
no rifts or deep pools}
^{^0.029}

^{Natural stream
channels: (2) Same as (1), but some weeds and
stones}
^{^0.035}

^{Natural stream
channels: (3) Winding, some pools and shoals,
clean}
^{^0.039}

^{Natural stream channels:}^{(4) Same as
(3), lower stages, more ineffective slope and
sections}
^{^0.047}

^{Natural stream
channels: (5) Same as (3), some weeds and stones}
^{^0.042}

^{Natural stream
channels: (6) Same as (4), stony sections}
^{^0.052}

^{^{Natural stream
channels:} (7)
Sluggish river reaches, rather weedy\or with
very deep pools}
^{^0.065}

^{^{Natural stream
channels: (}8) Very
weedy reaches}
^{^0.112}

For additional
“n” values, refer to Table}

Click Here for Link to Appendix C A