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 General Standards

- City Standards Disclaimer -

Public Works attempts to achieve maximum uniformity of construction and engineering practices within the City of Lewiston. These are minimum standards and are intended to assist, but not to substitute for work by engineering and design professionals. Special conditions or environmental constraints may require more stringent design than would normally be required under these Standards. It is not the intent of the City to limit any innovative effort that could result in a superior project design. A proposed design, which is different from these Public Works Standards, will be evaluated on the basis that the proposed design will produce a comparable or superior result, and in every way adequate for the user, the City, and the Public.

    Note: DWG files are AutoCAD 2007 format and must be saved to your system before opening. 
     

 Drawing Name

 Revision Date

 PDF

 DWG 
 Table of Contents  February 2016

 XX

 
City Inspection Checklist   September 2016  XX  
Fire Apparatus Access Road - LFD SOP 906   11 January 2016  XX  
 City Standard Disclaimer & Deviations and City Specifications  June 2015  XX  
 1    General Standards      
 1-1 Utility Locations

March 2013

 1-1

 

 1-2 Utility Pedestal & Trench Detail

 February 2009

 1-2

 

 1-3 Street Monument w/ Frame & Cover

 June 2013

 1-3

 

 1-4 Backfill Class A

 March 2013

 1-4

 

 1-5 Backfill Class C

March 2013

1-5 

 

 1-6 Backfill Class D

 March 2013

 1-6

 

 1-7 Backfill Class F

March 2013

 1-7

 

 1-8 Identifying Tape Detail

 February 2016

 1-8

 

 1-9 Concrete Street Repair Detail

 February 2009

 1-9

 

 1-10 Adjust Utilities

 January 2015

 1-10

 

 1-11 Curbside Mailbox Detail

 February 2009

 1-11

 1-11c7

 1-12 Clear Vision Area

February 2009

 1-12

 1-12c7

 1-13 Disabled Parking Sign Installation

 February 2009

 1-13

 1-13c7

 1-14 Disabled Parking Stalls

 February 2009

 1-14

1-14c7

 

 1-15 Parking Layout Dimensions

 February 2009

 1-15

 1-15c7

 1-16 Parking Lot Section

 February 2009

 1-16

1-16c7

 

 1-17 Sidewalk Drain Detail   

 October 2010

 1-17

 1-17c7

 2    Concrete Standards      
 2-1 Driveway Location & Width Requirement

 February 2009

 2-1

 2-1c7

 2-2 Retention Swale

 December 2015

 2-2

 

 2-2A Narrow Retention Swale

 December 2015

 2-2A

 

 2-3 Inlet Apron

 June 2010

 2-3

 2-3c7

 2-4 Valley Gutter

 February 2009

 2-4

 2-4c7

 2-5 Detectable Warning for Pedestrian Access

 September 2010

 2-5

 2-5c7

 2-6 General Notes for All Types of Curb & Gutters

 February 2013

 2-6

 

 2-7 High Back Curb and Rolled Curb & Gutter

 February 2009

 2-7

 2-7c7

 2-8 Concrete Sidewalk

  August 2015

 2-8

 

 2-9 Pedestrian Curb & Type 'A' Curb

February 2009

 2-9

 2-9c7

 2-10 Depressed Curb Section

 March 2009

 2-10

 2-10c7

 2-11 Sidewalk Ramp Type 1

 September 2010

 2-11

 2-11c7

 2-12 Sidewalk Ramp Type 2

 September 2010

 2-12

 2-12c7

 2-13 Sidewalk Ramp Type 3

 September 2010

 2-13

 2-13c7

 2-14 Single Perpendicular Ramp with Buffer

 September 2010

 2-14

 2-14c7

 2-15 Single Perpendicular Ramp without Buffer

 September 2010

 2-15

 2-15c7

 2-16 Driveway Approach - Split Apron Sidewalk

 February 2013

 2-16

 

 2-17 Driveway Approach - Buffer Strip

 February 2013

 2-17

 

 2-18 Driveway Approach - Jogged Sidewalk

 February 2013

2-18 

 

 2-19 Driveway Approach - Wide Sidewalk

 February 2013

 2-19

 

 2-20 Typical Two-way Arterial Street Driveway Approach 

 February 2009

 2-20

 2-20c7

 3    Street Standards      
 3-1 Private Shared Driveway

 February 2009

 3-1

 3-1c7

 3-2 Orchard Residential Street - Two 10' Travel Lanes

 January 2011

 3-2

 3-2c7

 3-3 Local Residential Street w/ Infiltration Drainage

 January 2015

 3-3

 

 3-4 Local Residential Street

February 2009

 3-4

 3-4c7

 3-5 < 500' Cul-De-Sac Roadway w/ Infiltration Drainage

 February 2009

 3-5

 3-5c7

 3-6 < 500' Cul-De-Sac Roadway

 February 2009

 3-6

 3-6c7

 3-7 Cul-De-Sac Design

 February 2009

 3-7

 3-7c7

 3-8 Residential Collector w/ Infiltration Drainage

 February 2009

 3-8

 3-8c7

 3-9 Residential Collector

 February 2009

 3-9

 3-9c7

 3-10 Paved Alley

 February 2009

 3-10

 3-10c7

 3-11 Local Commercial w/ Infiltration Drainage

 February 2009

 3-11

 3-11c7

 3-12 Local Commercial

 February 2009

 3-12

 3-12c7

 3-13 Industrial & Commercial Collector

 February 2009

 3-13

 3-13c7

 3-14 Minor Arterial

 February 2009

 3-14

 3-14c7

 3-15 Corner Radius

 February 2009

 3-15

 3-15c7

 3-16 Typical Rural Roadway (within Impact Area)

 February 2009

 3-16

 3-16c7

 3-17 Curb Extension & Mid-block Choker - page 1 of 2

 November 2012

 3-17p1

 

         Curb Extension & Mid-block Choker - page 2 of 2

 November 2012

 3-17p2

 

 4    Water Standards      
 4-1 Potable & Non-Potable Waterline Separation

 November 2009

 4-1

 4-1c7

 4-2 Gate Valve Box w/ Assembly

 November 2009

 4-2

 4-2c7

 4-3 Combination Blow Off & Sampling Tap

 November 2009

 4-3

 4-3c7

 4-4 Thrust Blocking Detail

 November 2009

 4-4

 4-4c7

 4-5 Typical Water Meter or Utility Marker Location, pg 1 of 2

 February 2015

 4-5p1

 

       Typical Water Meter or Utility Marker Location, pg 2 of 2  February 2015  4-5p2  
 4-6  3/4" Water Service Connection

 February 2015

 4-6

 

 4-7  1" Water Service Connection

 February 2015

 4-7

 

 4-8  1 1/2" Water Service Connection

 February 2015

 4-8

 

 4-9  2" Water Service Connection

 February 2015

 4-9

 

 4-10 Double Check Valve Assembly for 2" or Smaller

 February 2015

 4-10

 

 4-11 Reduced Pressure Backflow Assembly 

 February 2015

 4-11

 

 4-12 Fire Hydrant w/ Shut-off Valve

 October 2013

 4-12

 

 5   Wastewater Standards      
 5-1 Private Service Connection

 December 2010

 5-1

 5-1c7

 5-2 Service Tap Options Detail

 December 2010

 5-2

 5-2c7

 5-3 Type 1 Manhole

 December 2010

 5-3

 5-3c7

 5-4 Type 1A Manhole - Shallow Manhole

November 2015

 5-4

 

 5-5 Typical Pressure Wastewater System Service Connection

 December 2010

 5-5

 5-5c7

 5-6 Concrete Manhole Collar

 January 2015

 5-6

 

 5-7 Manhole Frame and Cover

 November 2012

 5-7

 

 5-8 Manhole Channel Detail

 September 2015

 5-8

 

     I    Industrial Pretreatment Section      
 I-1 1000 Gallon Grease Interceptor

 June 2010

 I-1

 -

 I-2 1000 Gallon Oil/Water Separator

 June 2010

 I-2

 -

 I-3 1500 Gallon Grease Interceptor

 June 2010

 I-3

-

 I-4 1500 Gallon Oil/Water Separator

 June 2010

 I-4

-

 I-5 2000 Gallon Grease Interceptor

 June 2010

 I-5

 -

 I-6 2000 Gallon Oil/Water Separator

 June 2010

 I-6

-

 I-7 2500 Gallon Grease Interceptor

 June 2010

 I-7

-

 I-8 2500 Gallon Oil/Water Separator

 June 2010

 I-8

-

 I-9 3000 Gallon Grease Interceptor

 June 2010

 I-9

-

 I-10 3000 Gallon Oil/Water Separator

 June 2010

 I-10

-

 I-11 Sand Trap

 June 2010

 I-11

-

 I-12 Interceptor/ Separator Manhole Frame & Cover

 June 2010

 I-12

 6    Stormwater Standards      
 6-1 System General Notes        

 December 2010

 6-1

 6-1c7

 6-2 Type 1 Manhole

 December 2010

 6-2

 6-2c7

 6-3 Type 1A Manhole - Shallow Manhole

 December 2010

 6-3

 6-3c7

 6-4 Manhole Concrete Collar

January 2015

 6-4

 

 6-5 Manhole Frame and Cover

 December 2010

 6-5

 6-5c7

 6-6 General Catch Basin Notes

 December 2010

 6-6

 6-6c7

 6-7 Catch Basin Frame and Grate

 November 2013

 6-7

 

 6-8 Type 1 Catch Basin

 December 2010

 6-8

 6-8c7

 6-9 Type 1A Shallow Catch Basin & Reduction Slab

 December 2010

 6-9

 6-9c7

 6-10 Standard Curb Drop Inlet - pg 1 of 2

 December 2010

 6-10p1

 6-10c7

        Standard Curb Drop Inlet - pg 2 of 2

 December 2010

 6-10p2

-

 6-11 Special Curb Inlet Type '2' 

 December 2010

 6-11

 6-11c7

 6-12 Sidewalk Drain Detail

 December 2010

 6-12

 6-12c7

 7    Solid Waste      
 7-1 Refuse Container Storage 14' x 10' Area                      

 October 2010

 7-1

 7-1c7

 7-2 Refuse Container Storage 10' x 10' Area

 October 2010

 7-2

 7-2c7