HomeMy WebLinkAboutStaff Report 283-07TO:HONORABLE CITY COUNCIL
FROM:CITY MANAGER DEPARTMENT: PUBLIC WORKS
DATE:JULY 9, 2007 CMR: 283:07
SUBJECT:CITY OF PALO ALTO STANDARD DRAWINGS AND
SPECIFICATIONS, 2007
This is an informational report and no Council action is required.
BACKGROUND
The Department of Public Works promulgates standard drawings and specifications to regulate
construction in the public right-of-way, ensuring improvements are safe, uniform and
maintainable. These standards contain technical drawings and specifications for implementing
public capital improvement projects and private development projects within the City of Palo
Alto. The tectmical drawings and specifications provide standards for improvements to public
streets, sidewalks, curb and gutter, medians, planting strips and stoma &ains.
In December ! 0, 1992 (CMR548:92), the City Council approved the 1992 standard &awings and
specifications and authorized the City Engineer to make may additional revisions, changes or
modifications to the City of Palo Alto standard drawings and specifications as deemed
reasonable, necessary or expedient, in accordance with sound engineering principles and
applicable law.
In response to the 2006 street maintenance program audit, staff recommended a complete update
of the standard drawings and specifications. Staff provided a status report of the audit
recommendations to the Finance Committee on February 21, 2007 (CMR:150:07) which noted
the City would complete the update to the standard drawings and specifications this Spring.
DISCUSSION
Since 1992, there have been new taws and regulations resulting in implementation of new
construction materials and engineering standards. The City periodically updated or added new
specifications and drawings into individual project conditions of approval, project specifications
and/or permit conditions to be consistem with the improved engineering standards. Sufficient
changes have been made to warrant the issuance of the 2007 edition, which formally
incorporates these revisions. The changes have been reviewed and approved by the City
Attorney’s Office and all affected City departments.
CMR:283:07 Page 1 of 3
Attachment A provides the complete detail on changes. The most significant revisions that have
been made to the 1992 Standard Drawings and Specifications are sunm~arized below:
1.Eliminate the general provisions. These provisions contain legal mad contractual
requirements not typically used for permitted work within the City’s right-of-way.
The general provisions typically include contract conditions such as award and
execution of contracts to measurement and payment items and are included in the
City’s construction bid and contract documents provided by the City’s Purchasing
Division.
2.Add a new specification to address storm water pollution prevention during
construction mad materials used for storm water pipelines.
3.Add requirement to increase the concrete stren~h in concrete streets from 2,500
pounds per square inch (psi) to 3,500 psi at 28 days. To meet this requirement,
cement is added with the use of flyash (a by-product of coal plants) and has proved to
increase concrete strength mad provides longer lasting concrete street repairs.
4. Require that truncated domes be installed at all new curb ramps and other locations as
specified by the Engineer to meet Americans with Disability Act (ADA)
requirements.
5. Add new detail for trench plates. This was a recommendation from the Auditor
intended to limit the duration of the plates installed in the public right-of-way. The
trench detail limits the distance and number of plates installed, shows the temporary
transition of the plate and roadway surface to enhance pedestrian, bicyclists and
motorist’s safety and requires that Public Works Inspector be notified when the plate
is installed and/or removed.
6.Add a new detail to demonstrate the limits of street cut and street restoration
requirements. The new street cuts are shown in various ways to minimize new street
cuts in relation to existing trenches.
7.Revise the trench specifications to include stringent requirements for surface and
subsurface excavation and restoration standards.
8. Add a new irrigation specification and drawings section.
9. Revise the Inert Solids and Building Materials Recycling section to require the
contractor to divert construction and demolition debris from the landfill.
Deconstruction is encouraged and salvageable materials must be made available for
re-use prior to recycling. Reuse of materials on current project is encouraged.
10. Added new detail for stringent tree protection during construction.
11. Added new section and detail for Engineered Soil Mix to provide a planting material
recommended for use in paved and/or hardscape areas to allow tree roots to grow
under sidewalks or paved surfaces.
Copies of the City of Pato Alto Standard Drawings and Specifications, 2007 are available at the
Development Center, Revenue Collections located on first floor of the Civic Center and on the
City’ s website.
ATTACHMENTS
Attachment A: Detailed Summary of Changes to the City’s 1992 Standard Drawings and
Specifications
CMR:_8~:07 Paae 2 of 3
PREPARED BY:
H~G NGtSYEN
Engineer i ,,
DEPARTMENT HEAD:
ELI kBETH AMES
Senior Engineer
’GLENN S. ROBERTS
Director of Public Works
CITY MANAGER APPROVAL:
EMIL~ HARRISON
Assistant City Manager
CMR:283:07 Page 3 of 3
ATTACHMENTA
CHANGES TO THE 1992 DEPARTMENT OF PUBLIC WORKS
STANDARDS AND SPECIFICATIONS
General
Reduce the Public Work Engineering Standards and Specifications from three (3) parts
(General Provisions, Technical Specifications and Standard Drawings) to two (2) parts
(Technical Specifications and Standard Drawings).Eliminated Part I - General
Provisions from the ! 992 Specifications.
Part 1
Deleted Sections:
Section 4
Section 5
Section 6
Section 7
Section 8
-Scope of Work
-Control of Work
-Control of Materials
-Legal Relations and Responsibility
-Prosecution & Progress
Section 1 - Definitions
Formerly "Definitions and Terms." Deleted all the definitions related to contracting
and added several definitions relating to technical.
Section 2 - Reference to Caltrans Standard Specifications
Remain as is.
Section 3 - Temporary Controls
Reference to the City’s Traffic Control Manual will be referenced to the Traffic
Control Requirements, which is provided by the transportation Division.Truck
Routes and Regulations are included.
Section 4 - Site Maintenance and Clean-Up
Formerly Section 9.
Section 5 - Requirements for Work in City Right-of-Way.
Formerly Section 10.
Contractors shall notiS’ the Engineer at least one week notice for review of sur~,ey
and work layout instead of two days.
Contractor shall notify- Underground Service Alert (USA) a minimum of two (2)
working days prior to any excavation instead of five (5) working days.
Section 6 - Field Sulwevina
Formerly Section 11.
Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
1 ofl0
Section 7 - Clearing and Grubbing
-Formerly Section 12.
-Revised to include pruning of vegetation and tree roots, and tree branch trinm~ing.
-Required Contractor to notify City Arborist if tree branches or/and tree roots is larger
than four (4) inches or roots are with 12" of the vertical portion of tree trunk need to
be cut.
Required all trees ~o be trimmed by a certified tree care specialist according to the
City’s Tree Technical Manual.
Section 8 - Storm Water Pollution Prevemion
New section addressing water pollution during construction.
Section 9 - Earthwork
Formerly Section 13.
Section 10 - Sub,rude
Formerly Section 14.
Section 11 - Aggregate Subbase
Formerly Section ! 5.
Section 12 - A~gre~ate Base
Formerly Section 16.
Section 13 - Asphalt Concrete
Formerly Section 17.
Removed requirement for Reinforcing Fabric.
Section 14 -Raisin~ of Existina Manholes. Monuments and Valve Boxes
Formerly Section 18.
Added on requirement for installing new electrical vault.
Increased concrete strength from 2500 to 3500 psi. Concrete shall contain six sacks
of cement per cubic yard instead of five.
Section 15 - Concrete Structures
Formerly Section 19.
Section 16 - Concrete Curbs. Gutters. Valley Gutters. Sidewalks. Driveways. Curb
Ramps and Streets
-Formerly Section 20.
-Required that Class 2 concrete shall be used to construct streets and valley gutters.
Class 2 concrete is a stronger mix design which contains six (6) sacks of cement per
cubic yard and has a minimum compressive stren~h of 3,500 pounds per square inch
at 28 days.
Required that all concrete work in Barron Park shall comply to the City of Palo
Alto’ s, "Barton Park Drainage and Street Design Guidelines."
Required lamp black shall be mixed at the rate of two (2) pints of liquid per cubic
yard instead of 1 pint per cubic yard.
2 of 10Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
-Added "Steel Bollards" installation details.
-Required "\\Sere concrete sidewalk is adjacent to the curb and gutter, it shall be
poured monolithicallv with the curb and gutter unless directed otherwise by the
Engineer."
Required "Truncated Domes" shall be installed at all new curbs returns and other
locations as specified by the Engineer.
Added transition details for three (3) feet gutter pan to two (2) feet gutter pan.
Section 17 - Borina, Trenchin~ and Potholin~
Fornaerly Section 21 "Trenching for Underground Utilities."
Added new details and requirements for Boring of conduit.
Added new details and requirements for Trench Plates.
Added new requirements for potholing utilities,
Required the Contractor to pay for the Street Cut Fee per the City of Palo Alto’s
Municipal Fee Schedule.
Added requirements for Dewatering Operations.
Revised the Trench Surface Restoration to include new requirements for Open Cut
Installation and to include "T-Cut" on trenches.
Section 18 - Storm Water Pipelines
Formerly Section 22 "Reinforced and Non-Reinforced Concrete Pipe" and Section 23
~Corrugated Metal Pipe."
Added requirements for Pol?~’inyl Chloride Pipe (PVC) and Ductile Iron Pipe (DIP).
Eliminated Non-Reinforced Concrete Pipe and Corrugated Metal Pipe.
Section 19 - Reinforcement
Formerly Section 24.
Section 20 - Slope Protection
Forn~erly Section25.
Section 21 - Lightning: Electrical and Traffic Signal Systems
Formerly Section 26.
Changed requirement to noti~ Underground Service Alert (USA) from five (5)
working days to at least two (2) working days before excavation.
Section 22 - Water, Gas, and Wastewater Systems
Formerly Section 27.
Section 23 - Reclaimed Water
Formerly Section 28.
Section 24 Inert Solids and Buildings Materials Recyclin~
Formerly Section 29 "Inert Solids Recycling",
Required Contractor to diverse construction and demolition (C&D) debris from
landfill.
Management of C&D debris must conform to the requirements of the Palo Alto
PuNic Works Department. Deconstruction is encouraged and salvageable materials
3 ofl0Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
must be made available %r re-use prior to recycling. Reuse materials on current
project site is encouraged. All remaining debris must be diverted to a Cib,-approved
facility.
Section 25 - Tree Well
Formerly Section 30 "Street Tree Well."
Specified new products for Frame and Grate, Topsoil and Tree Stake.
Eliminated brick surfacing and root barrier requirements.
Section 26 - Tree Protection
New section refers to new detail 605, which identifies three types of tree protection
for various existing conditions.
Section 27 - Striping. Legends. Markers. and Signag~e
New section includes removal and replacement of striping, legends, and traffic signs.
Thermoplastic material will be used, not paint. Glass beads application is referenced
to Caltrans Standards.
Section 28 - Irri~ation
New section describing the installation requirements for irrigation systems.
Section 29 - Plantin~
New section describing requirements for planting work and planting maintenance.
Section 30 -Enaineered Soil Mix
New section specified details and requirements for Engineered Soil Mix.
Section 31 Miscellaneous Specialties
New section describing miscellaneous requirements for Bicycle rack, shop drawings,
Product data, etc.
Part 2 - Standard Drawings
Formerly Part 3.
Dwg No. 101 - Curb Ramp with 4’ Landing
1. Added a minimum saw-cutting width to be one (1) foot from lip of gutter.
2.Added al! asphalt patches shall use 3/8" hot mix asphalt concrete.
3.Added the placement of ~2" felt at expansion joints at all curb returns.
4.Slope of ramp changed to 8.33% from 8.25%.
5.Changed maximum slope of the flare from 11.4% to ! 0%.
6.Added cross slope from lip of gutter to face of curb at max 5%.
7.Added a!l new- concrete shall be doweled into existing concrete structures with #4
rebar 2’ O.C. and embedded 6".
8. Added note ~Pedestrian crosswalk striping shall conform to Caltrans.’:
9. Added ;~Truncated dome" requirement.
Dwg No. t 02 - Curb Ramp without 4’ Landin~ (Radius<t 2’)
1. Added cross slope from lip of gutter to face of curb at max 5%.
Changes to the ! 992 Department of Public Works Standard Drawings and
Specifications
4 ofl0
2.Maximum slope of ramp and flares is 8.33%.
3.Added all asphalt patches shall use 3/8" hot mix asphalt concrete.
4.Added the placement of ½" felt at expansion joints at all curb returns.
5.Radius table reformatted.
6.Added a minimum saw-cutting width to be one (1) foot from lip of gutter.
7.Added all new concrete shall be doweled into existing concrete structures with
rebar 2’ O.C. and embedded 6".
8. Added note ~Pedestrian crosswalk striping shall conform to Caltrans."
9. Added "Truncated dome" requirement.
Dwg No. 103 - Curb Ramp without 4’ Landinz (Radius>12’)
1.Added cross slope from lip of gutter to face of curb at max 5%.
2.Maximum slope of ramp and flares is 8.33%.
3.Added all asphalt patches shall use 3/8" hot mix asphalt concrete.
4.Added the placement of ½" feit at expansion joints at all curb returns.
5.Radius table reformatted.
6.Added a minimum saw-cutting width to be one (1) foot from lip of gutter.
7.Added all new concrete shall be doweled into existing concrete structures wil5 #4
rebar 2’ O.C. and embedded 6".
8. Added note ~Pedestrian crosswalk striping shall conform to Caltrans."
9. Added "Truncated dome" requirement.
Dw~ No. 104 - Curb Ramp with Sidewalk Less than 5 Feet Wide Type 1
!. Added cross slope from lip of gutter to face of curb at max 5%.
2. Added
3. Added
4. Added
5. Added
6.
all asphalt patches shall use 3/8" hot mix asphalt concrete.
the placement of ~/_~" felt at expansion joints at all curb returns.
a minimum saw-cutting width to be one (1) foot from lip of gutter.
a cross section for PCC streets.
Added all new concrete shall be doweled into existing concrete structures with
rebar 2’ O.C. and embedded 6".
Added note "Pedestrian crosswalk striping shall conform to Caltrans."
Added "Truncated dome" requirement.
Dw~ No. 105 - Curb Ramp with Sidewalk Less than 5 Feet Wide
1. Replaced old detail with new detail from mid block ramps with radius style ramp,
similar to Dwg No. 101,102, and 103.
2. Added *~Truncated dome" requirement.
Dw~ No. 120 - Driveway Construction Type A Curb and Gutter
1. Removed 1" x 3" keyed construction joint.
2. Added all new concrete shall be doweled into existing concrete structures with #4
rebar 2’ O.C. and embedded 6".
3. Added a cross section for PCC streets.
4.Driveway area extent is from lip of gutter to back of thickened sidewalk.
5.Added all asphalt patches shall use 3/8" hot mix asphalt concrete.
6.Added that saw cutting shall be made full depth and full width of sidewalk.
7.Added no saw- cutting permitted along longitudinal score marks on sidewalks and
driveways.
5 of 10Changes to the !992 Department of PuNic Works Standard Drawings and
Specifications
Dw~No. 121 - Driveway; Construction Type B Curb and Gutter
Removed 1" x 3" keyed construction joint.
Added all new concrete shall be doweled into existing concrete structures with 84
rebar 2’ O.C. and embedded 6".
3. Added a cross section for PCC streets.
4.Added all asphalt patches shall sue 3/8" hot mix asphalt concrete.
5.Added that saw cutting shall be made full depth and full width of sidewalk.
6.Added no saw cutting permitted along longitudinal score marks on sidewalks and
driveways.
"7. Changed the construction joint at back of driveway to a 1" deep joint.
8. Added that saw cutting shall be prohibited on PCC streets to 3’ from top of curb.
Dwg No. 122 - Driveway Construction Type A Curb with Adjacent Sidewalks
I. Removed 1" x 3" keyed construction joint.
2. Added al! new concrete shall be doweled into existing concrete structures with #4
rebar 2’ O.C. and embedded 6".
3. Added a cross section for PCC streets.
4.Driveway area extent is from lip of gutter to back of thickened sidewalk.
5.Added all asphalt patches shall sue 3/8" hot mix asphalt concrete.
6.Added that saw cutting shall be made full depth and full width of sidewalk.
7.Added no saw cutting permitted along longitudinal score marks on sidewalks and
driveways.
Dwa
1
2.
3.
4.
No. 123 -Driveway. Industrial at Street Grade
Added all asphalt patches shall use 3/8" hot mix asphalt concrete.
Added a cross section for PCC streets.
Changed minimum PCC driveway thickness to 6" PCC over 4" Class II AB
Added all new concrete shall be doweled into existing concrete structures with #4
rebar 18" O.C. and embedded 6".
Added a minimum saw-cutting width to be one (1) foot from lip of gutter.
Dw_~. No. 124 - Historical Radius Driveway
1. New detail.
Dwg
1.
2.
No. 131 - Valley Gutter Type A Integral
Removed 1" x 3" keyed construction joint.
Added all new concrete shall be doweled into existing concrete structures with #4
rebar 18" O.C. and embedded 6".
Added a minimum saw-cutting width to be one (1) foot from lip of gutter.
Added all asphalt patches shall sue 3/8" hot mix asphalt concrete.
Dwg
1.
2.
4.
Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
No. 132 - Valle}; Gutter Tvpe B Integral
Removed 1" x 3" keyed construction joint.
Added all new concrete shall be doweled into existing concrete structures with #4
rebar 18" O.C. and embedded 6".
Added a minimum saw-cutting width to be 1 foot from lip of gutter.
Added all asphalt patches shal! sue 3/8" hot mix asphalt concrete.
6 ofl0
Dw~. No. 132A -VaIlev Gutter Barton Park
1. New detail.
Dw_~. No. I~,~B Vatlev Gutter at Street Intersection Barton Park
1. New detail.
Dw~_
1.
2.
No. 133 - Vertical Curb and Gutter Type A
Removed l"x 3" keyed construction joint.
Added all new concrete shal! be doweled into existing concrete structures x~ith #4
rebar 18" O.C. and embedded 6".
3.Typical gutter pan is to be 24".
4.Added no saw cutting permitted along iongitudinal score marks on sidex~alks and
driveways.
5.Added all asphalt patches shall use 3/8" hot mix asphalt concrete.
6.Added note "\\~en possible, pour Type A curb and gutter monolithically with
sidewalks, driveways and PCC slabs.
7. Added note "Install longitudinal deep score along entire back of curb."
D~g No. 134 - Rolled Curb and Gutter Type B
1.Removed 1" x 3" keyed construction joint.
2.Added all new concrete shall be doweled into existing concrete structures with #4
rebar 18" O.C. and embedded 6".
3. Added all asphalt patches shall use 3/8" hot mix asphalt concrete.
4. Added 1 1/4" deep joint on top of curb.
5. Added note "On PCC streets, sawcuts for the lip of gutter shall be made 3’ from
top of curb (TOC)."
6. Added note "When possible, pour Type A curb and gutter monolithicatly with
sidewalks, driveways and PCC slabs.
7. Added note ~’Install longitudinal deep score along entire back of curb."
Dwa. No. 135 - Vertical Curb and Gutter Type A Saw-Cutting Detail
1. New detail.
Dw~. No. 136 - Rolled Curb and Gutter Type B Saw-Cutting Detail
1. New detail.
Dw~ No. 141 - Sidewalk Construction
1. Added all new concrete shall be doweled into existing concrete structures with #4
rebar 18:’ O.C. and embedded 6".
2.Saw cut full depth and full width across walks.
3.Added note ’~Sawcut walk full depth and full width on score marks perpendicular
to the curb. No sawcutting on longitudinal score marks."
4.Added note "Install longitudinal deep score along entire back of curb that is not
monolithic with the sidewalk."
Dwg No. 142 - Special Sidewalk Treatments
1. Replaced with new detail "Transition from 3’ Gutter to 2’ Gutter."
Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
7 ofl0
Dw~. No. 301 - Catch Basin Installation Type ’~A" Curb
1. Box is 24;’ x 24’" instead of 36" x 25 ½".
?Added note "Stencil curb adjacent to catch basin with ~No Dumping: Flows to
[creek name]’ message."
Dw~. No. 302 - Catch Basin Installation Type "B" Curb
1.Box is 24" x 24" instead of 36" x 25 1/_,,,.
2.Added note "Stencil curb adjacent to catch basin with ~No Dumping! Flows to
[creek name]’ message."
3.Catch basin to be centered 3’ from curb return at intersection comer instead of
3’7".
Dw~ No. 303 - Standard Hood. Frame and Grate
1. Replaced with new detail of standard hood, frame & grate.
Dwa. No. 304 - Catch Basin Away from Curb
1.Added note "Stencil curb adjacent to catch basin with ~No Dumping! Flows to
[creek name]’ message."
Dw~. No. 312
1. Added
2. Added
- Manhole Standard Precast 36" and Smaller
Ram-Nek for j oint sealant.
2 layers of#4 rebar @ 12" O.C. for the manhole base.
Dwa. No. 313 - Storm Manhole Standard Precast Pipe Larger than 36"
1. New detail.
Dwg. No. 314 - Stoma Manhole for Shallow Pipe Locations (36" Cover or Less)
1. New detail.
Dwg. No. 321 Curb Outlet for Gravkv Flow
1.Changed wire mesh from 4" x 4" to 6" x 6".
2.Added note ~Similar detail for ~ype B (Rolled) curb.
with the contour of the rolled curb.
Cut the drain pipe flush
Dwg. No. 322 - Curb Outlet for Pump Discharge
1.Added note "Box must be located within the property line or 2’ min. from back of
walk."
Dwg. No. 331 -Pipe Repair Detail for Stoma Drain
1. New- detail.
Dwa. No. 332 - Fiber Rolls
1. New detail.
Dwg No. 401 -Trenches Typical Cross Sections
1.PCC shall contain minimum of 6 sacks of concrete and compressive strength of
3500 psi.
Changes to the 1992 Department of Public Works Standard Drawings and 8 of 10
Specifications
~.Extend T-Cut to lip of gutter on aggregate base streets.
3.Added all new concrete shall be doweled into existing concrete structures with
rebar 18" O.C. and embedded 6".
4. Added alternate subsequent and initial backfill materials.
Dwo_. No. 402 - Conduit Location Detail Telecommunications
t. New detail.
Dw~. No. 403 - Trenches Limits of Restoration
1. New detail.
Dw~. No. 404 - Trench Plates
1. New detail.
Dw~ No.501 -Pedestai Mount Controller
1. New detail. Replaced old Dwg No. 501 - Street Barricade
Dw¢. No. 502 - Irri_oation: Exterior Wall Mount Controller
1.New detail. Replaced old Dwg. No. 502 - Survey Monument Frame, Cover,
Installation.
Dwa. No. 503 - Irri~ation: Trenchin~
1. New detail. Replaced old Dwg. No. 503 - Tree Well Detail Sidewalk.
Dwo_. No. 504 - Irri~_ation: Trenchino_ Near Tree
1. New detail. Replaced old Dwg. No. 504 - Tree Well Detail Planter Strip.
Dwo_.. No. 505 - Irri~ation: Wire Connectors
1. New detail. Replaced old Dwg. No. 505 - Tree Protection During Construction.
Dw~. No. 506 - Irri~ation: Remote Control Valve
1. New detail.
Dwo~. No. 507 - Irrio_ation: Quick Couplin~ Vabe
1. New detail.
Dwg. No. 508 - Irrigation: Gate Valve
1. New detail.
Dw~. No. 509 - Irrigation: Pop Up Spray Head
1. New detail.
Dwg. No. 510 - Irri~ation: Pop Up Bubbler for Shrubs and Trees
1. New detail.
Dw~. No. 511 - Solar Powered Irrigation Controller
1. New detail.
Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
9 ofl0
Dw~. No. 512 - Irri~ation: Reduced Pressure Principle Assemble (RPPA~
1. New detail.
Dwg. No. 513 - Irrigation: Bubbler Installation for Trees in Ground Cover and other
A_reas
1. New detail.
Dwg No. 602 - Sur~Tev Monuments. Frame. Cover
1. Formerly Dwg No. 502 - Survey Monument Frame, Cover, Installation.
2. Replaced old monument box with G5 Traffic Valve box 10 3/8" I.D. x 12".
3. Replaced class B concrete with class 2 concrete.
No. 603 - Tree Well Detail
Formerly Dwg. No. 503 - Tree Well Detail Sidewalk
Specified tree frame and grate shall be KIVA.
Specified grate stake shall be manufactured by J.R. Partners.
Removed brick requirement.
Dw~. No. 604A - Engineered Soil Mix
1. New detail.
Dw~. No. 605 - Tree Protection Durin~ Construction
1.Formerly Dwg. No. 505. Replaced old Dwg. with new Drawing No. 605 of the
Palo Alto Tree Technical Manual.
Dwg. No. 606 - Steel Bo!lard
1. New detail.
Dw~. No. 607 - Removable Steel Bollard
1. New detail.
Changes to the 1992 Department of Public Works Standard Drawings and
Specifications
10 of 10