Skip to code content (skip section selection)
Compare to:
Reading Overview
Reading, PA Code of Ordinances
READING, PA CODE OF ORDINANCES
PREFACE
Chapter C HOME RULE CHARTER
Chapter 1 GENERAL PROVISIONS
Chapter 5 ADMINISTRATIVE CODE
Chapter 14 AUTHORITIES
Chapter 23 BOARDS, COMMISSIONS, COMMITTEES AND COUNCILS
Chapter 36 FIRE AND RESCUE SERVICES
Chapter 51 INITIATIVE AND REFERENDUM
Chapter 62 PENSIONS
Chapter 70 PERSONNEL
Chapter 77 POLICE DEPARTMENT
Chapter 91 SALARIES AND COMPENSATION
Chapter 120 ALARM SYSTEMS
Chapter 127 ALCOHOLIC BEVERAGES
Chapter 141 ANIMALS
Chapter 166 CABLE TELEVISION
Chapter 173 COMMERCIAL LAUNDRY CODE
Chapter 180 CONSTRUCTION CODES
Chapter 185 CONVERSION THERAPY
Chapter 188 CURFEW
Chapter 201 ELECTRIC SERVICE
Chapter 212 FEES
Chapter 219 FIREARMS
Chapter 225 FIREWORKS
Chapter 231 FIRE INSURANCE PROCEEDS
Chapter 237 FIRE PREVENTION AND PROTECTION
Chapter 251 FOOD CODE
Chapter 272 GRAFFITI
Chapter 288 HEALTH AND SAFETY
Chapter 295 HISTORICAL AND CONSERVATION DISTRICTS
Chapter 302 HOUSE NUMBERING
Chapter 308 HOUSING
Chapter 317 INVASIVE PLANTS AND NOXIOUS WEEDS
Chapter 325 LAW ENFORCEMENT
Chapter 328 LEAD POISONING PREVENTION
Chapter 332 LIBRARY
Chapter 339 LICENSES AND PERMITS
Chapter 346 LITTER AND ADVERTISING MATERIAL
Chapter 353 LOITERING AND PANHANDLING
Chapter 364 MASSAGE THERAPISTS
Chapter 378 MUNICIPAL CLAIMS AND LIENS
Chapter 387 NOISE
Chapter 396 PARKS AND RECREATION
Chapter 403 PAWNBROKERS
Chapter 410 PEDDLING AND SOLICITING
Chapter 424 POLES
Chapter 431 PROPERTY SALES
Chapter 433 PUBLIC ART
Chapter 438 RAIN BARRELS
Chapter 442 RECORDS, PUBLIC ACCESS
Chapter 453 SALES
Chapter 460 SCRAP METAL DEALERS
Chapter 467 SEWERS AND SEWAGE DISPOSAL
Chapter 473 SEXUALLY ORIENTED BUSINESSES
Chapter 479 SIDEWALK CAFES
Chapter 485 SIGNS
Chapter 496 SOLID WASTE
Chapter 502 STORAGE FACILITIES
Chapter 505 STORMWATER MANAGEMENT
Chapter 508 STREETS AND SIDEWALKS
Chapter 515 SUBDIVISION AND LAND DEVELOPMENT
Chapter 521 SUSTAINABILITY
Chapter 536 TAMPERING WITH PUBLIC PROPERTY
Chapter 540 TATTOO AND PIERCING ESTABLISHMENTS
Chapter 543 TAX ABATEMENTS
Chapter 546 TAX AMNESTY PROGRAM
Chapter 549 TAXATION
Chapter 555 TREES
Chapter 564 VEHICLE NUISANCES, STORAGE OF
Chapter 570 VEHICLE REPAIR SHOPS
Chapter 576 VEHICLES AND TRAFFIC
Chapter 583 VENDING MACHINES
Chapter 600 ZONING
Chapter A610 ANNEXATION OF TERRITORY
Chapter A611 BOND ISSUES AND LOANS
Chapter A612 FRANCHISE AND SERVICES
Chapter A613 GOVERNMENTAL AND INTERGOVERNMENTAL AFFAIRS
Chapter A614 PLAN APPROVAL
Chapter A615 PUBLIC PROPERTY
Chapter A616 SEWERS
Chapter A617 STREETS AND SIDEWALKS
Chapter A618 WATER
Chapter A619 ZONING; PRIOR ORDINANCES
Chapter DT DERIVATION TABLE
Chapter DL DISPOSITION LIST
§ 505-129. Calculation methodology.
   A.   Stormwater runoff from all development sites with a drainage area of greater than 200 acres shall be calculated using a generally accepted calculation technique that is based on the NRCS Soil Cover Complex Method. Table 505-129.1 summarizes acceptable computation methods and the method selected by the design professional shall be based on the individual limitations and suitability of each method for a particular site. The municipality may allow the use of the Rational Method to estimate peak discharges from drainage areas that contain less than 200 acres. The Soil Complex Method shall be used for drainage areas greater than 200 acres.
Table 505-129.1
Acceptable Computation Methodologies for Stormwater Management Plans
 
Method
Method Developed by
Applicability
TR-20 (or commercial computer package based on TR-20)
USDA NRCS
Applicable where use of full hydrology computer model is desirable or necessary.
TR-55 (or commercial computer package based on TR-55)
USDA NRCS
Applicable for land development plans within limitations described in TR-55.
HEC-1/HEC-HMS
U.S. Army Corps of Engineers
Applicable where use of full hydrologic computer model is desirable or necessary.
PSRM
Penn State University
Applicable where use of a hydrologic computer model is desirable or necessary; simpler than TR-20 or HEC-1.
Rational method (or commercial computer package based on Rational Method)
Emil Kuichling (1889)
For sites less than 200 acres and with time of concentration less than 60 minutes (Tc < 60 min.), or as approved by the municipality and/or Municipal Engineer.
Other methods
Varies
Other computation methodologies approved by the municipality and/or Municipal Engineer.
 
   B.   All calculations consistent with this Part using the Soil Cover Complex Method shall use the appropriate design rainfall depths for the various return period storms according to the region in which they are located as presented in Table B-1 in Appendix B of this Part. 12 If a hydrologic computer model such as PSRM or HEC-1/HEC-HMS is used for stormwater runoff calculations, then the duration of rainfall shall be 24 hours. The SCS "S" curve shown in Figure B-1, Appendix B of this Part shall be used for the rainfall distribution.
   C.   For the purposes of existing conditions flow rate determination, undeveloped land shall be considered as "meadow" in good condition, unless the natural ground cover generates a lower curve number or Rational "C" value (i.e., forest), as listed in Table B-2 or Table B-3 in Appendix B of this Part. 13
   D.   All calculations using the Rational Method shall use rainfall intensities consistent with appropriate times-of-concentration for overland flow and return periods from the design storm curves from Pennsylvania Department of Transportation Design Rainfall Curves (1986) (Figures B-2 to B-4). Times of concentration for overland flow shall be calculated using the methodology presented in Chapter 3 of Urban Hydrology for Small Watersheds, NRCS, TR-55 (as amended or replaced from time to time by NRCS). Times of concentration for channel and pipe flow shall be computed using Manning's equation.
   E.   Runoff curve numbers (CN) for both existing and proposed conditions to be used in the Soil Cover Complex Method shall be obtained from Table B-2 in Appendix B of this Part. 14
   F.   Runoff coefficients (c) for both existing and proposed conditions for use in the Rational Method shall be obtained from Table B-3 in Appendix B of this Part.
   G.   Where uniform flow is anticipated, the Manning equation shall be used for hydraulic computations, and to determine the capacity of open channels, pipes, and storm sewers. Values for Manning's roughness coefficient (n) shall be consistent with Table B-4 in Appendix B of this Part.
   H.   Outlet structures for stormwater management facilities shall be designed to meet the performance standards of this Part using any generally accepted hydraulic analysis technique or method.
   I.   The design of any stormwater detention facilities intended to meet the performance standards of this Part shall be verified by routing the design storm hydrograph through these facilities using the Storage-Indication Method. For drainage areas greater than 200 acres in size, the design storm hydrograph shall be computed using a calculation method that produces a full hydrograph (i.e., TR-20, TR-55, HEC-1, PSRM). The municipality may approve the use of any generally accepted full hydrograph approximation technique that shall use a total runoff volume that is consistent with the volume from a method that produces a full hydrograph.
12.   Editor's Note: Appendix B is included at the end of this chapter.
13.   Editor's Note: Appendix B is included at the end of this chapter.
14.   Editor's Note: Appendix B is included at the end of this chapter.