APPENDIX C SANITARY SEWER PEAK DESIGN FACTOR

Transcription

1 PPENDIX C SNITRY SEWER PEK DESIGN FCTOR ll gravity sewers will be designed to accommodate the peak flow from the contributing drainage area. The peak flow will be computed using the appropriate peaking factor, F, multiplied by the average day flow for the contributing area. For non-residential areas, the peak flow should include consideration of flow characteristics from the anticipated development. In all cases, the design peaking factor, F, shall meet or exceed the values as follows: n equivalent population less than 5,000 persons, F = 4 n equivalent population greater than or equal to 5,000 persons, F = (14 / ( P 0.5 ) ) For, P = equivalent population in thousands dditional consideration of peak flow shall be given for design of pumping stations. The impact of pumping stations on the upstream and downstream sanitary sewer system shall be evaluated. The peak flow for design of a pumping station shall be based on the flow into the station. reduced peak flow, based on the peaking factor presented above, may be used for design of larger pumping stations provided a detailed hydraulic analysis is performed on the sanitary sewer system. Specific approval by the Community Development Department shall be required prior to use of a reduced peak flow for the design of a pumping station and related sanitary sewer system. C - 1

2 PPENDIX - D MNDREL REQUIREMENTS ll gravity sanitary sewers, constructed using P.V.C pipe, shall be tested using a Mandrel that will measure five percent (5%) deflection in the pipe. STM 3034, current, provides diameters for seven and one-half percent (7-1/2%) deflection. Five (5%) deflection requirements are listed below. P.V.C. PIPE SDR 35 Nominal Pipe Size verage Inside Diameter Base Inside Diameter % Deflection Mandrel P.V.C. PIPE SDR 26 Nominal Pipe Size verage Inside Diameter Base Inside Diameter % Deflection Mandrel For P.V.C. pipe sizes larger than fifteen inch (15 ) diameter, specific requirements for the Mandrel will be established by the Community Development Department. D 1

3 PPENDIX E STREET LIGHTING REQUIREMENTS Street Type Pavement Right-of-Way Minimum-Maximum Lumens Width Width Distance Minor / Local (50 w/ utility easements) Note 1 Note 2 Collector / Note 1 Note 2 Commercial Divided Roads Note 1 Note 2 (2 each) Note 4 Note 5 NOTES: 1. Distances shall be measured along the centerline of road. Minimum Maximum Distance shall be as per approved layout from the lighting company (CenterPoint). 2. ll lighting shall be High Pressure Sodium Vapor with elliptical lighting pattern. 3. Where practical, lights shall be located on alternating sides of roadway. 4. Distance applies to each side of a divided roadway, i.e. double the number of lights. 5. For boulevard streets, double-arm steel standards in the median may be utilized. Light standards and electrical conduits shall not conflict with other City/County/State facilities in the right-of-way. 6. ll street light fixtures shall be full cut-off fixtures to minimize light pollution. E - 1

4 Printed on 08/12/2004 C.I.P. Engineering & GIS M:\utoCD_Data\CITY STNDRDS\workingcopies\ rcinfo_trace\f1\f1.mxd PUBLIC WORKS DEPRTMENT THE GUIDELINES PRESENTED IN THIS DOCUMENT INCLUDE THE MOST OFTEN REQUESTED INFORMTION REGRDING GEOMETRIC DESIGN OF SUBDIVISION STREETS. DESIGNTED MJOR THOROUGHFRES (I), ND COLLECTOR STREETS (1) WITHIN SUBDIVISIONS, SHLL BE CONSIDERED FOR SPECIL DESIGN FETURES ND MY REQUIRE HIGHER DESIGN CRITERI THN SHOWN HEREIN. LSO, DESIGN FETURES NOT SHOWN IN THESE GUIDELINES SHOULD BE CONSIDERED SPECIL DESIGN FETURES. IT IS DVISBLE TO CONSULT WITH THE PPROPRITE GENCIES ND REVIEW THE MOST RECENT EDITION OF THE FOLLOWING PUBLICTIONS TO DETERMINE DEQUTE THOROUGHFRE REQUIREMENTS ND SPECIL DESIGN FETURES. RECOMMENDED GUIDELINES FOR SUBDIVISION STREETS, INSTITUTE OF TRNSPORTTION ENGINEERS. GUIDELINES FOR URBN MJOR STREETS DESIGN, INSTITUTE OF TRNSPORTTION ENGINEERS. POLICY OF GEOMETRIC DESIGN OF HIGHWYS ND STREETS, MERICN SSOCITION OF STTE HIGHWY ND TRNSPORTTION OFFICILS. TEXS MNUL ON UNIFORM TRFFIC CONTROL DEVICES (TMUTCD), TEXS DEPRTMENT OF TRNSPORTTION. (1) DESIGNTED RODWY PPERING ON THE MJOR THOROUGHFRE ND FREEWY PLN, HOUSTON CITY PLNNING COMMISSION. NOTE: LL REFERENCES TO HRRIS COUNTY ND CITY OF HOUSTON SHLL BE REFERRED TO CITY OF WEBSTER, COMMUNITY DEVELOPMENT DEPRTMENT. PPENDIX F - 1

5 PUBLIC Drawing produced 08/12/2004 C.I.P Engineering & GIS, City of Webster, TX File: M:\utoCD_Data\CITY STNDRDS\workingcopies\ STREET_standards\F2\F2.mxd TYPICL LENGTH OF MEDIN ND MEDIN OPENING ST. C h = PRIVTE STREET OR DRIVEWY C h TYPICL LENGTH OF MEDIN OPENING "C" = 50' or "D" + 10' whichever is greater h B C C h PUBLIC ST. D MINIMUM CCEPTBLE MEDIN LENGTH FOR TYPE OF STREET PURPOSE OF MEDIN INTERRUPTION IF PLNNED DIVIDED MJOR STREET/ COLLECTOR LOCL PRIVTE STREET STREET IS: THOROUGHFRE () STREET () STREET () OR DRIVEWY (B) MJOR 350' 300' 300' 300' STREET/THOROUGHFRE COLLECTOR STREET 300' LOCL STREET PPENDIX F - 2

6 Drawing produced 08/12/2004 C.I.P. Engineering & GIS File: M\utoCD_Data\CITY STNDRDS\workingcopies\ STREET_standards\F3\F3.mxd MEDIN NOSE ND LEFT TURN BY DESIGN B2 = Paved pedestrian space minimum 6', or 10' as required by paving dimensions. B1 W R2 R1 W P.I. P.I. 500' R 500' R W W LT R1 R2 R3 B MEDIN DIMENSIONS W R1 R2 R3 10' NONE W/2 NONE > 10' 90' W/5 NONE < 40' NONE NONE 15' LEFT TURN BY DIMENSIONS = 150' minimum at intersections of two major streets. = 100' minimum at all other intersections. B = 100' minimum on straight roadway. B1 = Taper length may be shorter if it is on a horizontal curve to the left. B2 = Taper length may be longer if curve is to the right. W (LT) = 10' minimum Note: Dimensions may be adjusted as determined by Community Development Department The above lengths required are minimum distance and may require adjusting to comply with acceptable engineering practices or an approved traffic Impact nalysis. ppendix F-3

7 Map produced 08/12/2004 C.I.P Engineering & GIS File: M:\utoCD_Data\CITY STNDRDS\workingcopies\ STREET_standards\F4\F4.mxd RODWY TPERS FOR SUBDIVISION STREETS B B 54' P.C. P.T. PUBLIC OR PVT. STREET 120' MINIMUM (1) ULTIMTE CURB LINE 120' MINIMUM NO TNGENT SECTION REQUIRED ON LOCL STREETS MINIMUM DEPRTURE/ PPROCH TPER SEE INSERT "" P.I. P.I. 3' R R = 350' MIN (2) 3' R 54' B B Notes: MINIMUM DEPRTURE/ PPROCH TPER (1) Minimum for restricted and Unrestricted reserves and locations Where a left turn lane may be required. MJOR STREET 500' R P.I. TPER 50' MIN. 500' R P.I. (2) Median opening may not be allowed if median becomes less than in length on major street. (3) pproach and Departure Taper Requirement: L = ws²/60 For S < 40 & S = 30 m.p.h. W = -B Where L = length in feet S = speed in m.p.h. W = lateral offset in feet (4) 350' minimum centerline radius for horizontal curve with approach or departure tapers. (5) pproach and departure taper requirements: S > 45 L = SW Minimum design speed for subdivision streets. ppendix F-4 INSERT "" FOR MEDIN CURB QUICK REFERENCE GUIDE RODWY CROSS SECTION (FEET) TPER L=WS 2 /60 + B + B (FEET)

8 Drawing produced 08/12/2004 C.I.P./Engineering & GIS City of Webster, TX File: M:\utoCD_Data\CITY STNDRDS\workingcopies\ file: STREET_standards\F5\F5.mxd GEOMETRIC STREET DESIGN STNDRDS Minimum Standards Right-of-Way Lanes Median Lanes DIVIDED RODWYS rterials P6D -- Major rterial, 6 Lanes, Divided P4D -- Major rterial, 4 Lanes, Divided M4D -- Minor rterial, 4 Lanes, Divided PC4D -- Major Collector, 4 Lanes, Divided Right-of-Way Lanes UNDIVIDED RODWYS rterials -- Collectors M4U -- Minor rterial, 4 Lanes, Undivided PC4U -- Major Collector, 4 Lanes, Undivided PC2U -- Minor Collector, 2 Lanes, Undivided Right-of-Way Lanes LOCL STREETS LR2U -- Residential, 2 Lanes, Undivided Parkway (Typ.) Design Roadway Type Element P6D P4D M4D M4U PC4D PC4U PC2U LR2U Number Traffic Lanes Lane Width '-40' 36' F-F (Ft.) F-F Width (Ft.) Design Speed (MPH) Max. Grade (%) Stopping Sight Distance (Ft.) Horizontal or Curvature Min. 300* Radius (Ft.) Vertical Clearance (Ft.) Lateral Clearance (Ft.) Min. Median Width (Ft.) Parking No No No No No No Some Yes Permitted Parkway Width (Ft.) * For local streets less than 2000' long. PPENDIX F - 5

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10 Map prepared on 05/12/2004 C.I.P. & GIS City of Webster, Texas File: M:\utoCD_Data\CITY STNDRDS \workingcopies\rcinfo_trace\f7\f7.mxd LLEY PVING CURB ND GUTTER STREET 12' Width Min. CONCRETE PVEMENT B EDGE OF RODWY MIN. SLOPE = 0.25% B EDGE OF RODWY D-1 INLET 2' WHEELCHIR RMP 2' 4' 4' SIDEWLK CURB SIDEWLK CURB CONNECT STORM SEWER LED TO EXISTING STORM SEWER SYSTEM PLN VIEW EXISTING GRDE (TYP.) MTCH EXISTING GRDE (TYP.) 3/8" /FT. (MIN.) 6" or 8" Reinforced Concrete Pavement ND RODWY 12' Width Min. CONSTRUCTION JOINT OR DEFORMED METL STRIP 1/4" / FT. 1' (TYP.) 1' (TYP.) 3" 1/4" / FT.3/8" (TYP.) / FT. (MIN.) 6" (MIN.) STBILIZED SUBGRDE #4 EQULLY SPCED WITH MX. SPCING OF 20 1/2" 24" or 18" SECTION B-B ppendix F-7