HARRIS COUNTYPUBLIC INFRASTRUCTURE

ENGINEERING DIVISION

GUIDELINES FOR ENGINEERSHAVING ENGINEERING CONTRACTS

WITH HARRIS COUNTY, TEXAS FOR THEDESIGN OF ROADS AND BRIDGES

AND THE PREPARAnON OFPlANS AND SPECIFICATIONS

ARTHUR L. STOREY, JR., P.E.EXECUTIVE DIRECTOR

APPROVED IN COMMISSIONERS' COURT AUGUST 23,1988

j:\perm\engineer con guidelines.doc

Revised August, 1988

GUIDELINES FOR ENGINEERS HAVING ENGINEERING CONTRACTS WITHHarris County, TEXAS FOR THE DESIGN OF ROADS AND BRIDGES AND THE

. PREPARATION OF PLANS AND SPECIFICATIONS

. 2-S"-'f9

Arthur .. Storey, [r., PExecutive Director\-t<lL r- ...., ~ Cc u ",~ f"o.a 'e~:c.. .I: ",~....~~.l.-ur<.. ..,~-\-.

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Revised Septe~e=, 1989

TABLE OF CONTENTS

SECTION TITLE PAGE

section I Preliminary Report Requirements. 1 - 6

section II Bri"dge Design Requirements 7 - 9

Section III Paving Design Requirements 10 - 11

Section IV Geometric Design Requirements 12 - 15

Section v Traffic Design and Right-of-Way 17 - 19Acquisition Requirements

Section VI Drainage and Storm Sewer Design 20 - 24Requirements

Section VII Sanitary Sewer Design Requirements 25

Section VIII Waterline Design Requirements 26

Section IX Utility Information Requirements 27 - 29

Section X Construction Drawing Requirements 30 - 47

Section XI Specification Requirements 48 - 53

Appendix 54 - :5

Bridge Layout Checklist 56 - :7

Presented herewith are the design guidelines for engineer::;having engineering contracts for the design of roac9:s and brid,?esfor Harris County. In general, these roads w~ll be maJ o:rthoroughfares. Consequently, these guidelines do not address thl!!

design of roads and bridges within 'subdivisions.

Wh~re waterlines and sanitary sewers are a part of the designof the road, they shall be designed in accordance with the "GeneralDesign Require~ents for Sanitary Sewers, Storm Sewers, Waterlinesand Paving" as prepared by the Departlllent of Public Works of thecity of Houston.

These design guidelines for the design of paving require thatthe pavement design be done by a Geotechnical Engineer, using testresults provided by a soils testing ~aboratory, from theexamination of existing soils encountered at the depth of theproposed pavement subgrade. Pavement design shall be based on thelatest revision of the "AASHTO Guide for Design of Pavementstructures". A lllinimum pavemant; thickness has not been designatedin these guidelines. Therefore, the pavement thickness proposed bythe Engineer shall be supported: by a design analysis. Thisrequirement is for all pavement design, whether- for flexible base,semi-rigid or rigid pavements.

In computing drainage runoff, a maximum lSD-foot wide strit:each side of and adjacent to the proposed road right-of-way, exceptfor developed areas drained elsewhere, shall be considered asconunercially developed surface contributing runoff to the roadway.The contributing runoff from all contributing areas outside the'lSD-foot wide strip shall be computed in accordance with the i.l:,present existing characteristics as outlined by these guidelinesi.Where the area-to be considered is outside the lSD-foot wide strip,a preliminary report shall be submitted to the county Engineer as;to why it is included in the drainage area.

Where the area to be considered is outside the lSD-foot widE~

strip, an explanation as to why it is included in the drainage are~c:,_

shall be included in the preliminary report submitted to the countryEngineer. -

i

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· .

SECTION I

PRELIMINARY REPORT REQUIREMENTS

.......

SECTION I

PRELIMINARY REPORT REQUIREMENTS

When an Engineer has a contract to prepare a Prelimina::::"yEngineering Report for Harris County, he shall follow the'guidelines outlined below for the preparation of the report.

It is within this phase of the engineering contract that the':Engineer should make every effort to explore all possibilities,conflicts and alternate solutions with associated costs and ma)<:E:his recommendations as. to the most practical way of solving the~

assigrnnent. During this research, the Engineer must analyze alJfacets of the proj ect considering the specific reguirement:;~

outlined in Sections II through XI and present his findings in ar.o:=ganized manner such that the County can make the requirE!c.decisions with all the facts available.

The arrangement of the report should be as follows:

The first part of the report should outline the authorizatic>!Lfor the proj ect, the location and description of the proj ect anctthe purpose and scope of the proj ect. The second. part shouldoutline the conclusions and recommendations for the design of tiw"proj ect, mentioning the alternatives available to the County. Trwthird part should be the cost estimate for the proj ect. ThE!balance of the report should contain the discussion and exhibi1:.~;

and would comprise' 95 percent of the bulk of the report. ThE!discussion should address all phases and phasing of the pzoposedconstruction, outlining just why certain alternatives were enosenover others and resolving all conflicts associated with tht~

project. The exhibit should contain plats, maps, drawing!s,sketches and a set of proposed engineering drawings at a reducedbut legible scale.

The following is typical information usually found in a HarrisCounty Preliminary Engineering Report:

-Limit of project and authorization (P.o., Bond Year, etc.)

-Description of typical section, number and type of bridges,outfall storm sewers, etc.

-(Topographic and Geologic) faUlting,information, vegetation, average landproject, existing roadway information.

general soilsslope throughout

-Restate Harris County requirements per these EngineeringGuidelines. Harris County Flood Control requirements asrelated to design of the drainage system pertaining to theproject.

-1-

• .:l' .:l 4=' '+o\.. 1 . . • ~. ;-For the draJ.nage ....esJ.gn, ....e r a.ne erie J.:mJ. ..S 0... a,::a ...nage a=l:,~

and break up into sub-areas. Include draJ.nage azee .calculations and storm sewer sizes of main trunks. She:,,;location of discharge. Show the type and spacing' of inle~s,A plotted hydraulic gradient is also required on plan andprofile sheets.

-In preparing the definitive' construction cost estimate, usutypical bid ite:m breakdown from .silllilar previous projects",'Provide estimated engineering costs. The engineering cos'!:spertain to those performed in the actual cons~ruction of thnproj ect and are not an estimate of the engineering costs fC:l:::­the design phase of the project. Do not provide right-of-wayand utility adjustment costs in the construction estimate.

-Where required by contract, provide general alignmen::drawings showing existing and proposed right-of-way. Provitit,:!an estimated cost of proposed rig~t-of-way acqu.i.sLt.Lcn.side::tifying any necessary construction easements. The right-·of-way acquisition cost estimate shall be prepared by .thl:!Engineer based on the best available information.

-Utilities and pipelines shall be located in plan and profile,including existing easements.:. Provide estimated cost c:):utility adjustments.

-Provide typical striping and button details. Based on A.D.'r.information, provide recommendations for any intersectionsthat will . require signalization, or modifications of ja1

existing signal.

-Provide an attached copy of the soils report for this proje:::(to be paid for by Harris County).

-In the. section on design recommendations, expand on thepavement design (beyond that in the soils report) describin;thickness of each layer and materials of construction(including reinforcing, if concrete), type of subgradetreatment with depth and percent of lime, flyash. orcombination of, or cement as specified, typical sections onroadway, ditches and outfalls, storm sewer bedding andbackfill recommendations. Bridges require type, span numbe rand lengths, substructure limits and type, width, 100 yeazflood elevation and bottom chord elevation, existing ar:,dultimate channel dimensions and limits and sections of a.r:.ychannel excavation. Define channel slope protection, wheIerequired.

-Drawings shall be prepared at 1:20 horizontal and 1:2vertical scale for plan/profile sheets, vicinity map, drainacl'emap, typical sections and layout of maj or proj ect iteIlls:, .Drawings may be reduced to 11" x 17".

The following should be used as a guideline for the ccrrcent.sof a Preliminary Engineering Report:

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GENERAL:

a. Report must contain a layout of plan with a profile.

b. Report must show limits of project and its location.

c. Must contain typical design cross-sections.. .d. Report must contain the

recommendations.soils. report, with it:s

e. Report must show all pipelines and utilities, along wit:hsizes, locations, limits within rights-of-way, elevaticmsand names of Owner, with their address and telephcmenumber. The report shall indicate the location ofexisting and proposed rights-of-way.

PAVING

a. Report must show limits of paving.

b. Typical section must indicate relative elevation ofroadway versus natural ground at right-of-way.

c. Show plan and profiles of intersectingdriveways, to commercial establishments,smooth transitions.

streets aridindicating

d. List the constants, verified in the geotechnical repor:,used in the AASHTO ~esign procedures.

e. Indicate spacingcontraction joints.

of expansion construction a.ad

f. Size reinforcing, using grade 40 deformed reinforc.i:1gbars, using the subgrade drag equation and size lendtransfer devices, giving spacing and lengths.

g. Indicate horizontal curve data on all sheets that show ahorizontal curve in plan view.

h. Included within the report shall be the engineeri~g

calculations which support the recommendations for pavi~g

thickness.

DRAINAGE

a. Include. drainage area maps to include a ISO-foot stripeither/both side of proposed roadway limits plus otherareas contributing to the drainage. A writtenexplanation shall be included as to why the areas outsidethe lSO-foot strip were included in the drainage area.Existing contouJ;s,' throughout all drainage areas, shallbe shown on the drainage area maps.

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b. Match tops of pipe where possible; and numerically 0= i:1profile include a hydraulic gradient with a profile C:l::the stOr1Il sewer.

c. Show location of drainage conduits using stations andoffsets.

d. Show type, station and· offset of manholes and inlets,with inlet elevations.

DRAWINGS

a. A North arrow must be shown on each drawing indicating d.

plan view pointing to the right or top of sheet.

b. Existing and proposed right-of-way lines must be shown.

c. Existing roads, drainage facilities, utilities, POWI~:::'

poles, :buildings, etc. withir~ the 'proposed right-of-w,aymust :be shown on the drawings.

d. All existing maj or item locations on the drawings shal Lbe indicated by station and offset .

.-

e. The preliminary profiles shall show locations of existin;pipe, centerline of road profile, ditch flowline aridelevation of natural ground at the R.O.W.'s.

f. The preliminary profiles shall show proposed roadwaycenterline or outside top of curb elevations, manholes,inlets, outfall structures I flowlines and top of stormsewer, locations of utility pipeline and adjustmentsrequired.

g. For. drawings contained in the Preliminary EngineeringReport, plan scale shall :be 1" '= 20'. Profiles scalesshall be 1" = 20' horizontal and a vertical profile scaleshall cover the limits of elevation changes throughoutthe project. The preferred vertical scale is 1" = 2'.Drawings may :be reduced.

h. Match linesstations andproject.

should beappropriate

on thedrawings

drawings, indicati~,g

for continuation cf

L, FEMA has established bench marks on County bridges;,culverts and etc. Where these :bench marks are to berelocated during construction, they shall be 5"0

identified in the report.

The following is the suggested outline of a typical report :f:ora bridge only project:

1. Introduction

-.4-

Including Bridge

2 .•

3.

4.

5.

6.

7.

?~rpcse and Scope

Project Location

Bridge Description and Cost Analysis

Recommendations and Design. .Project Cost Estimate

Exhibits

-Cover sheet with Vicinity Map

-Topographic Survey

-Proposed Bridge Layout and Roadside· Drainage

-Plan and Profile

-Typical Transverse Deck Section,Railing Details

-Other Drawings Required~by these Guidelines

8. Preliminary Bridge Design Calculations

9. Appendices

-Geotecr~ical Investigations

-Field Notes

-Engineering References

The following is the suggested outline of a typical report fora road-and bridge project:

1. Introduction

2. Purpose and Scope

3. Project Location and History

4. Design Criteria

5. Suggested Construction Phasing

6. Property Ownership

7. Recommendations and Design

8. Cost Analysis

9. Project Cost Estimate

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~o. Exhibits

-Cover Sheet with Vicinity Map

-Land Use Map

-OVerall Sheet Layout and Index

-Drainage Area Map

-Typical Cross-sections and Phasing

-Plan and Profile Sheets with Soils Borings Shown

-other Drawings Required by these Guidelines

~~. Appendices

-Geotechnical Investigations

-Enqineering References

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· .

SECTION II

BRIDGE DESIGN REQUIREMENTS

SECTION II

BRIDGE DESIGN REQUIREMENTS

L All bridges are to be designed to a minimum AASHTO H20 CJ~:

HS-20 load design. Designs ~re to be in accordance with thE!latest edition of the "Standard. Specifications for Highwc!.~~

Bridges", as adopted by AASHTO.

2. Brldge widths:

a. Where there are no curbs on the approach pavements thl~

width of bridge, face to face of curbs i is to be equal 1:0the out to out distance of the approaching road pavemerrcplus four feet, plus the width of walks.

b. Individual one way traffic bridges on esplanadl~

boulevards shall have one 6-foot clear width sidewalk (:)]'1

the outside and a 2-foot clear width curb on the inside.Two way traffic bridges shall have a 6-foot wide sidewal:con each side.

c. Where curbs are on the: approach pavement, the width I:JE

bridge face to face of curbs Ls to be the same as thadistance between curb faces on the approach road.

d. Bridges of width covered by (a) above, are to have 4-footclear width sidewalks. Bridges of width covered by (c)above, are to have 6-foot clear width sidewalks.

3. All bridges are to be constructed of reinforced concrete,unless specific applications require other materials, and thenonly with the prior approval of the County Engineer.

4. Bridge railings are to be Harris County standard railings enreinforced concrete parapets. The Harris county EngineeringDepartment has standard drawings for three types of guardrail.These are pedestrian rail, traffic rail and combinaticnpedestrian and traffic rail.

5. Each bridge shall have one bronze or aluminum plaque mourrt.s.dthereon in accordance with the standard dr~wing obtainablefrom the Harris County Engineering Department.

6. Where applicable, the following items should be addressed :..nthe design of bridges:

a. Show a typical section through the bridge.

b. Show number of bridges and show station locations ofbeginning and end.

c. Indicate number of spans and length at center.

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d.

e.

f.

g.

Show width and location of sidewalks.

A vertical curve should be provided. Give curve'data an=appropriate elevations for proper cap placement.However, even without a vertical curve, deck, bents an=abutment elevations are required. Show top of grout pa=elevation. . .

If possible, place all bridges on tangents.

Is a detour required for construction of the bridge? Ifso, the Engineer shall provide a traffic control p Lan ,"will the detour require a construction easement?

h. Are utilities required to be attached to the bridge? Ifso, they should be shown.

i. Can .bridge be built in a single .phe.se , or are mUltiplephases required? Two way traffic must be maintained.

j. Show the ultimate channel profile and section on t.hedrawings.

k. Show thedrawings.

one hundred :year flood elevationAlso, the normal water elevation.

on t.he

1. Prestressed box beams are the preferred type c fconstruction. If other types of beams are proposed itshould be so indicated and prior approval is required.

m, Bridge railings shall be in accordance with Harris ccunt yEngineering Department details.

n , Is additional right-of-way required for the ccnatrructi.onof the bridge? If so, this should be so indicated.

o. Use sand-cement grout in keyways. Do not use non-shri.r.kgrout.

p. Wing\oialls should be designed' separate from the brid9E~,with their own supports.' Lengths shall be adequate t.econtain the appropriate side slopes.

q. The correct piling embedmentembedment (minimum of 1"assured.

(minimum of 3")6") in the cap

and strandshould be

r. All bridge expansion jointssidewalks.

shall extend throllqh

s. CUrbing is to be 6 or 8 inches in height to allow :f':lrfuture overlay.

-8- ._'9"C

t.

u.

Slope paving rec;r..rirements should be dete=m~nec.. Slop =paving shall be a minimum of 4-1/2 inches in thickness,with weepholes and toewalls if required.

Show direction of traffic on bridge plans.

w.

v. Indicate all horizonta"l and vertical control features 0:1

the drawin~s. .

Pile schedules showing structure, estimated lengths,average calculated pile load and number of piles arerequired for bent and abutment schedules.

x. Any provisions for future bridge expansion shall beconsidered in the design.

7. Harris county will contract with a Geotechnical firm for. thesoils exploratory phase of the project •. They can only begintheir program in an efficient manner after they have receive~

from the Consultant a preliminary bridge layout in enoughdetail that indicates existing topography, purported andultimate channel widths and depths, bridge limits, spans, etc.This will enable the Geotechnical firm to prepare and carryout the soils exploration.: program and to furnish theConsultant recommended foundation types and support capacity ..data.

~9- .........

· ,

SECTI<:lN III

PAVING DESIGN REQUIREMENTS

SECTION III

PAVING DESIGN REQUIREMENTS

1. All pavement design, whether. for flexible base, semi-rigid c=rigid pavements shall be based on the latest revision of the"AASHTO Guide for Design of ·Pavement structures". (Note: T'he~atest guide is copyright 1986.)

2. Pavement design shall not be done on an assumption of aoi.Lcharacteristics, but shall be done only after receipt of atesting laboratory report. Pavement thickness a.r.dreinforcement shall be supported by a design analysis.Reinforcement shall be Grade 40 deformed reinforcing bars.

3. For subgrade soil conditions requiring' stabilization, the s o i.Lshall be stabilized using the material (lime, flyash, etc.)applied at the rate recommended by a soils testing laboratory.

4. All pavement design shall be performed only on the basis elfactual laboratory examination of the existing soilsencountered at the depth o"f 'the proposed pavement subgradE!.Flexible base pavement design shall be based on the Californ:.. aBearing Ratio of the untreated soil. Rigid pavement des i.rmshall" be based on the modulus of subgrade reaction from plclt:ebearing tests of the untreated soil. The required laboraten:ytest results may be derived from other types of tests actual:.yperformed on the soil, provided there exists suitab:.ecorrelations to the required C. B.R. and plate bearing test~;.

An acceptable substitution for the plate bearing test would bea correlation between the SDHPT Triaxial test value, andmodulus of subgrade reaction, K. It is "the ultima':eresponsibility of the Design Engineer to stipulate1::hepavement section i the final choice of the pavement desiqnshould be his decision, with the County·s concurrence.

5. The basis of design shall be:

a. All maj~ thoroughfares must be designed on the basis I:>f10 x 10 equivalent 18 kip single axle loads over a20year design period.

b. Use a serviceability index of 2.5 for all paVemt2:ltdesigns.

c. Use a Level of Reliability, R, of 95%.

d. A 7 day concrete pavement flexural break strength oj: aminimmn 500 psi by the third-point loading method, usinga minimmn of 5-1/2 sacks of cement per cubic yard ofconcrete shall be used in the design of concretepavements.

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a11:~

the::lexibleused in

The following layer coefficients forsemi-rigid pavement mater;als should bedesign.

H.M.H.L. Asphaltic Concrete Surface MateriaL 0.4~~H.M.H.L. Asphalt Base (Black Base) ••................ 0.34Cement Stabilized Lime.s't;one .•••..••••••.............. 0.23Lime stabilized Limestone .......••....•............. 0 . 17 .

e.

Raw Limestone ....•.•..•••...••••.•.••.•.••.......... 0 . 14Cement stabilized Earth.....•••..................... 0 .1!5Lime Stabilized Earth•....••••.••.•••.••••.......... 0.11

f. The Regional Factor used should be between 1. 0 and 1.:5.In low lying areas prone to floodins, a Regional Facti:>·':'of 1.5 should be used.

g. The following are the minimum thicknesses to be applie:ito each asphaltic concrete pavement. courses.

Surface Course 2 inchesBase Course 4 inchesSub-base Course (if sub-base is used) •.••...... 4 inches

The Engineer is required to submit all calculations forpavement design to the County Engineer for review, prior"to incorporating the design in final plans andspecifications.

6. Where stabilization is recommended, the percentage of thetotal weight of the material shall be indicated.

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SECTION IV

GEOMETRIC DESIGN REQUIREMENTS

SECTION IV

GEOMETRIC DESIGN REQUIREMENTS

1. In general, geometric design shall be based on t.~e "Guidelinesfor Urban Major street Design" published by the Institute cfTransportation Engineers. Where applicable, geomet=ic desi.s·nshall also be based on the "Geometric Design Guidelines :f'crS'ubdivision Streets" as agreed to jointly by the City cfHouston and Harris County.

2. The following is offered as further guidelinesintersections, turnouts, transitions and thoroughfares.

Roadway centerline curves shall not exceed 3 degrees, un.Les.sotherwise approved by the County Engineer. C ;,-""., .~ ( ! 'f'"

Y , .. V l..'::C. U'.. -

Super-elevation by reverse curves will not be done.

Shoulders shall be improved, shall be of a width approved kythe County Engineer and shall be. of a different surfa.c ematerial and color from the roadway paving , with open dit.chdrainage. : :

All driveways are to be paved to the right-of-way line and azeto be of the same surface material as the roadway.

Traffic lanes are to be 12. O-feet for two lane and four la.r.edivided and II-feet for four and six lane undivided width a.r.dare to be delineated in accordance with the "Texas Manual cnUniform Traffic Control Devices", as shown in the appendix.

The maximum skew allowed at an intersection is 1200, with a

preferable maximum of 100 to 110 degrees.

The standard 100-foot boulevard shall consist of:

a. One 3l-foot esplanade (back to back of curb)

b. 12.5 feet for two 25-foot roadways (back to back of curb)

c. Back of outer curbs to be 9' - 6" from right-of-way linewhere possible.

Requirements for intersections, turnouts, transitions emdthoroughfares are as follows:

a. At a "T" intersection with a street that has not bEHmimproved to its ultimate width, concrete pavement shou:.dbe stopped either at the right-of-way line or at the endof the curb return, whichever would require less concrE!1:eremoval at a future date.

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b. When roadway tu:=nou~s are placed where an e~is~ing czcs.sstreet intersects, the tu=nout should be sized to fit tb.~

ultimate pavement width and then transitioned to th.~

existing roadway.

c. The usual transition length for meeting an open dit(::lstreet is 50-feet. :tf the street is shell or asphal"::surfaced, the transition should be a minimum of S-inchle~:;of cement stabilized shell or approved equal, and 1-1/2inch H.M.A.C. surfacing. If the street is concrete, th,etransition shall be concrete of a like thickness.

d. When paving only one roadway of a proposed two roadwaythoroughfare, all left turn lanes and esplanadecrossovers in the one-half of the right-of-way where theroadway is being paved shall be paved to the center lineof the street right-of-way.

e. When meeting existing concrete streets at right angles I

the existing street should be sawed in a v-shape,extending from the curb return to a point where thecenterline of the proposed pavement intersects thequarter point of the existing concrete street to create acrowned intersection.-; In :the event that thisconstruction creates a situation- in which the traffic onthe existing street will be subject to riding conditionsat the posted limit plUS 10 mph, Whereby the movingvehicle will bottom out when crossing the proposed streetintersection, a special design will be allowed toeliminate this dangerous condition.

3. The grade on ditches for roadway sections with open ditches is0.05 - 0.10 percent per 100 feet. In general, velocities inopen ditches should not exceed 2-feet per second.

4. All driveways shall have, culverts; paved dips for drivewa.y sshall not be allowed.

5. For paved streets with curb and gutter sections, the followi.rgguidelines shall apply:

a. The minimum gradient on'the gutter should be a minimum clf0.25 percent per 100 feet.

b. The maximum drop of grade turnouts from oppos it~e

directions to a common inlet shall be 1% per 100 feet.

c. Grade on driveways, from gutter flowline or edge ofpavement, to natural ground at the right-of-way :_:~:Llle

shall not exceed 13 percen~.

-:13-

d. There shallturnouts forlarger radiusIn all cases,streets.

be a 1 percent fall around intersec~ic~

a minimum radius of 2S-feet. Grades for ashall be determined on an individual basis.of course, ties shall be made'to existin;

e.

f.

Vertical curves shall be installed when algebraicdifference in grades' exceed one percent. Elevationsshall be shown at ten foot intervals through verticalcurves.

When a curb and gutter intersects a drainage ditch, theelevation of the gutter shall be above the design watersurface of the ditch.

g. The amount of cross slope over the pavement secticnshould be shown on the plans.

h. A minimum gradient of 0.40 percent around the longestradius is required on an h-type street intersection.

d . When meeting an existing curbed street, top of cU!bgrades should be laid to meet an elevation 3-inches abovethe gutter, except at inlets.

j . Grades should be laid to match the top of curb of e.nexisting inlet.

k , Vertical curves should be labeled every 10 feelt.Maintain a minimum of 0.03 feet on 10 foot intervals.

1. When curb grades are not laid below natural ground, fi.lllines shall be shown on the drawings.

m• Grades shall be labeled for all top of curbs except C.trailroad crossings. Centerline grades are acceptable t:clropen, ditch section only.

n , The gradient for tangents to vertical curves at railrc)c,dcrossings shall be a maximum of 3.5 percent, unl.esisotherwise approved by the County Engineer.

o , Gutter elevations are required for vertical curves whE~J~e

a railroad track is being crossed.

p. Where railroad crossings are not at right angles to 1:hepavement slab, vertical curves should be calculated :El)reach curb line and should be posted at 10 foot interva:Lsin the profile.

q. Inlets should be placed away from the maj or thoroughfarl~s

and on the side streets at street intersections.

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r. Attempt to keep the proposed.esplanade openings and outintersections.

inlets aw~y from theof maj or . tho::-oughfare

s. Inlets should be placed at th~ end of pavement in orderto eliminate drainage from the pavement gutter into anopen ditch when the ~rainage is toward the end of thepavement or from the open ditch to the pavement gutter.

t. CUrbs are to be decreased from 6-inches to zero inches in1.0 feet when approaching railroad tracks or existingroadway without curb.

u. Valley gutters may be allowed at intersections, howeve=,this is not the preferred practice.

6. Miscellaneous Design Requirements:t

a. The type and amount of subgrade treatment should be shOwnon the plans.

b. If driveways are to be constructed within the proj ec:t ,show locations and typical sections on the plans and pcs t;a centerline for the driveway at the property line withelevation for each drive." .

c. Paving headers shall be placed at the end of all cencret sslabs.

d. All concrete to be removed shall be removed either to 2nexisting joint or a sawed joint.

e. A 45 mph sight distance should be used on all cre~st

vertical curves. If, for some reason, a -greater spee-dlimit is allowed, then a greater sight distance shall cfcourse be utilized.

f. standard Harris County Type III barricades shall beplaced at the end of all dead end streets.

g. Horizontal dowels are required when meeting concz-et.epavement that has no exposed steel.

Dowels should be24-inches centerepoxied.

No.to

6 barscenter,

plain, . 16-inches lon~r,

embedded a - inches and

As an alternative to the above, saw cut and remCJ'Veexisting concrete to expose.."__.a.~inimUlD. of a-inches oflongitudinal steel with an equivalent cross sectionalarea of steel equal to the proposed pavement steel.

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h. Dead=end street.s designed to be e:...-tended in the ::'.:.t1.:.:::- =shall have l5-inches of reinforcing steel exposed beyo::;'I,ithe pavement, coated with asphalt and wrapped with burl,a:::for future pavement tie. .

i. Driveways shall be of the same material as the pzcposedroadway. . .

Asphalt drives shall be a minimum 2-inch Type "0" HMH:"asphaltic concrete surface material on a minimum 6-inche;;of black base over 6-inches of lime or cement stabilize:lsubqrade compacted to 95 percent of standard p r oct.ordensity at ± 2 percent of optimum moisture.

j. A1.l requirements of the "Texas Manual on Uniform Traffi=Control Devices" as published by the 'I'exas Department ofHighways and Public Transportation shall be strictl~

adhered to.

k. Where an expans ion j oint intersects a driveway, th eexpansion joint shall be carried to the right-of-wayline, to where a transverse expansion joint shall belocated on the right-of-way line.

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. .

SECTIO~ V

TRAFFIC DESIGN AND RIGHT OF WAY

1..

ACQUISITION REQU~RZMENTS

SECTION V

TRAFFIC DESIGN AND RIGHT OF WAY ACQUISITION REQUIREMENTS

Determination of right-of-way acquisition should be based emultimate geometric design,' alignment, fill requirements anddrainage requirements. The following items should bE!considered in determining right-of-way acquisition:

a. Left turn storage lanes

b. Dual left turn lanes

c. Right turn lanes

d. Transitions

e. Shoulders

f. Sidewalks (limited to replacement of existing walks onlyunless specifically instructed otherwise by the CountyEngineer) •

g. Drainage facilities/fill requirements

h. Future signalization

i. Angle of intersections with all streets

j. Alignment of major thoroughfares

k , Schools, hospitals, shopping centers, or other traffi:generators.

2. Traffic Design Requirements are as follows:

a. Minimum turning radii based on operating approach spee:3.are:

1. Less than 35 mph, minimum 30 feet:

2. Greater than 35 mph but less than 45 mph, 35 feet;

3. Greater than or equal to 45 mph, 35 feet with rig'htturn lanes, otherwise 45 feet.

3. Recommended lane width (see geometric design requirements):

a. Desirable is 12-feet

b. Minimum of II-feet

-17--

4.

Revised Septembe=, 1959

Where applicable, the "Roadway Design Standards", prepared 1: Iythe City of Houston Traffic and Transportation Departmerlt.,shall be used to determine such items as:

a. Left turn storage capac.ity ,

b. spacing of esplanade openings,

c. Median openings,

d. Bullet type esplanade dimensions,

e. Traffic button layouts, etc.

5. Transitions should be based on:

L .. WS2 / 60 for urban residential and other streets wii:hspeeds 40 mph or less

L = S x W for major thoroughfares where speeds are 45 mph orgreater

Where L = length, S 0= design speed, W = offset on one side, :.n .,feet of the traveled lanes or may be expressed as i:hedifference in overall width of the pavement.

6. Minimum returns should be based on:

P.I. to P.I. = 100 feet, using a radius of 500 feet

7. Should the end of the transitions be closer than ± 500 feet ':0

the next left turn lane transition, then a median, continuc:nsleft turn lanes, or esplanade should be used to avoid a'weaving effect.

8. Channelized islands should be offset 2-feet from edge 'Jfpavement.

9. Use reflectorized pavement markings and/or striping in lieu ~f

mountable curbs to channelize left turn lanes.

10 .. Horizontal curves should not exceed 3 degrees and supe~­

elevation should not be used except with prior approval ofttlecounty Engineer. Where super-elevation is used, it should bebased on the following equation:

V2e = l5R - f

Where: e - rate of roadway super-elevation in feet per feetf • side friction factorV • vehicle speed in mphR = radius of curve in feet

-18-

~l. vertical Cllr'l-as should be based en the following equation:

L - KA

Where: L E: length of the vertical curve in feet (see SDHPToperations and Procedures Manual)

K E: a constant used for design

A = the algebraic difference of grades in percent

Design of guard rails should be in accordance ....i th the"Highway Design Operations and Procedures Manual 2-76", aspublished by -the State Department of. -Highways and PublicTransportation.

13. Traffic control in construction zones shall be in completecompliance with the "Texas Manual on .UJ1.iform Traffic ControlDevices" (MUTeD), as published by the state Department ofHighways and Public Transportation and should include thefollowing:

a. Temporary striping and removal as soon as practical (atemporary striping plan .as well as a permanent stripingplan shall be included in the drawing set).

b. Placement, relocation and maintenance of signs, signals,lighting devices, markings, barricades channelizing andhand signal devices.

c. Reflectorized pavement markers and paint striping shouldbe in accordance with the Harris County EngineeringDepartment Standards and Specifications.

0.• Pavement edge 1 ines , stop bars, 1 ane 1 ines , transvers emarkings, curb markings, center lines, no passing zones,transitions, c::hannelizing, cross....alks, railroad crossirgmarkings, symbol markings and etc. should be shown on t.t.eplans and shall be in accordance with the MUTCD.

e. Left turn lanes should be considered at all maj Ctrintersections and traffic generators (schools, shoppingcenters, etc.).

14. Location and design of traffic signals or relocation and/clrmodification of signals shall only be done with prior writt:Emapproval of the County Engineer. Design guidelines 1:ortraffic signals will be furnished by the Harris 'COU1'l1:yEngineering Department.

-19-~_-.

· .

SECTION; VI

DRAINAGE AND STORM SEWER DESIGN REQUIREMENTS

Revised Septe~e=, 1989

SECTION VI

DRAINAGE AND STORM SEWER DESIGN REQUIREMENTS

. .GENERAL

1. S:tonn Sewer Systems

1.1 All storm sewers and appurtenant construction shallconform to the Harris County Engineering DepartmentConstruction Specifications.

2. Pavement Elevations.:

2.1 High point of the top of the curb shall be at not morethan 3-inches below natural ground.

3. Design Requirements

3.1 The City of Houston "Rainfall Runoff Curves, Three YearFrequency, Drawing No.; S-506", shall be.. used as thecriteria for determining runoff and discharge.

3.2 Gutter grades should be a minimum of· 0.25 percent per lCOfeet.

3.3 Runoff originating outside the designated limits shall tedetermined by a complete study of the area using Harri sCounty Flood Control District curves or City of Houst~cncurves, ·for a three year frequency.

3.4 A maximum lSD-foot wide strip each side of and adj acarrtto the proposed road right-oi-way, except for daveLope-dareas drained elsewhere, shall be considered a.scommercially developed surface (curve No.1) ,contributing runoff to the roadway. The contributingrunoff from all areas outside the two lSD-foot wielestrips shall be computed in accordance with existingcharacteristics as outlined by paragraph 3.3. Where arnais to be considered outside the 1S0-foot wide strip, awritten explanation shall be submitted to the EngineeringDepartment as to why it is included in the drainage arE~(L.

3.5 Storm sewers, inlets and roadside ditches shall bedesigned to handle a three year frequency rainfall. Thevelocity in the storm sewer shall be a preferred. 3 fps.The hydrologic methodology used shall be in accordarll::ewith the "Hydrology Manual for Harris County, Texa:s II ,

prepared by the Harris County Flood control District.

-2q-

3.6 All outfall ditches shall be designed to handle a 25 yea=frequency rainfall and a ba~kwater curve shall ~e plo~~e~in red on a set of bluelines of all outfall d~tches anastorm sewers to determine flood hazards. A separateletter report shall be sent to the County Engineer,discussing these findings.

3.7 Location of outfall ditches shall, where practical,coincide with future ditch locations specified by theHarris County Flood Control District. The outfalls intoall Harris County Flood Control ditches and otherdrainage waterways shall provide protection against soilerosion and energy dissipators as required by the"criteria Manual for the Design. of Flood Control andDrainage Facilities in Harris County, Texas", as preparedby the Harris County Flood Control District.

3.S Where open ditch drainage is proposed, the minimum depthof roadside ditches shall' be lS-inches and the maximumdepth shall not be more than 4-feet, unless priorapproval is obtained. Low flow.storm sewers, below theditches, shall not be used.

3.9 The minimum preferred 'unlined or unimproved roadsideditch section. should have a side slope no steeper thanthree (3) horizontal to one (1) vertical configuration.The steepest slope shall not exceed two (2) horizontal toone (1) vertical.

3.10 In locations where ditches are four feet or more i1'1depth, a metal guard rail is required along the top ofthe front slope. This requirement may be waived by th.eCounty Engineer provided an adequate distance exist.sbetween the edge of the shoulder and the top of the fron.tslope of the ditch.

3.11 On four-lane roadways, thestorm sewer design shall belane width of water shallcurbed sections.

spacing and inlet size fCIIsuch that not more than eriepond in the low gutter Clf

3.12 The minimum grade or slope of z-cads Lde ditches shall be0.10 percent unless approval is obtained, from the courrcyEngineer. The average velocity within the ditch sncul.e.not exceed 2-feet per second.

3.13 The Consulting Engineer shall provide a contour anc.drainage area map.

3.14 The Consulting Engineer shall submit drainasrE~

calculations, based upon curves, to support line size~~i

and slopes. The "n" coefficient in Mannings Formulc.shall be 0.013 for concrete pipe and 0.024 for corrugatE~cl

pipe. .

-21-

3.~5 Calculations or ~ne hydraulic gradient shall be furnishedby the Design Engineer and shown on the plans. ThE~

hydraulic gradient is to be based upon the water surfaCE~

in the outfall ditch or channel for a 25 year storm anddischarges developed for Harris County Flood ControlDistrict curves through the proposed system maintainin9hydraulic gradient b.e3;ow gutter elevation. in allinstances. For approved open ditch sect~ons thE~

hydraulic gradient shall be 0 . 5 feet below the edge 01:pavement or natural ground elevation, whichever .isgreater.In the calculation of the hydraulic gradien'tline for a proposed system the 25 year storm is to beused at the outfall ditch or channel, while the designdischarge (3 year rain) is to be routed through thE~

system itself.

3.16 The minimum size pipe for storm sewers shall be 24-inchesinside diameter pipe or equivalent ,cross-sectional az-eaand shall be designed to have a minimum velocity of threE~

feet per second when flowing full. The minimum s Lzestorm sewer inlet leads shall be 24-inches .i.ris Ldediameter or equivalent cross-sectional area.

3.17 The "n" coefficient in ~Mannings Formula for open ditchcalculations shall be based on the surface treatment 01:the completed channel section, with 0.035 as the minimwncoefficient for unlined ditches. .

3.18 A graphic plot and calculations of the hydraulic gradien1:employing culvert design parameters shall be shown foreach drainage section and shall be 0.50 feet below thE~

edge of pavement or natural ground elevation, whicheveris lower.

3.19 The ,minimum size culvert shall have a cross-sectionalarea equal to or greater than a 24-inch inside diameterpipe. Pipe culverts shall conform to ASTM specLri.cat.LcnsC-76, Class III, for reinforced concrete pipe. Allproposed and reasonable expected future culverts shall beincluded in the hydraulic profile.

3.20 Erosion control methods acceptable to the County Enginee:t:'shall be utilized in ditch designs wher~ the velocitiesof flow are calculated to be greater than 5 fps, or wher,esoil conditions dictate their need.

3.21 Ring grates are required at the end of all storm sewerleads to open ditches.

4. Materials, Alignments and Spacing

4.1 Materials:

All storm sewers shall be constructed with reinforcedconcrete pipe or boxes, either precast or cast in placetype.

-22-

The use of corrugated galvanized metal pipe may be us e.donly at the storm sewer outfall into lined or unlinedchannels.

4.2 Alignments:

All cast in place concrete storm sewers shall follow t~t.e

alignment of the right-of-way easement.

All storm sewer inlet leads shall be designated in astraight line alignment.

All sewers shall be located in public street right-of-v.r2Yor in easements adj oining or parallel to strE~e.t

right-oi-way.

In all easements restricted to storm sewers, the p i.peshall be entered within the limits of the easement.

4.3 spacing:

Manholes are required at: all pipe size or .condu.i.t; cxoas-­sectional changes.

Manholes are required at all pipe sewer intersections orP.I. IS.

Manholes are required at all pipe ~ewer grade chanqus(precast pipe only).

Manholes are required at all street intersections.

Manholes are required at a maximum of six-hundred fE~Ht·

(600') measured along the center line of the pipe sewer.

Manholes are required at all inlet lead intersectic:mswith the pipe sewer where precast concrete pipe sewE~::'s

are designed. Manholes are not required where inll!tleads intersect a monolithic concrete storm sew.!::-;however, mariho'Les may be required as necessary to provid.eaccess for adequate maintenance of lead ~ines.

Inlets must be spaced to serve the calculated runo:fE.CUrb inlets shall be spaced so that the maximum trav!ldistance of water in the gutter shall not exceed 300 fle!atone way.' CUrb inlets shall be located on intersecti.:1gside streets ·to maj or thoroughfares on all origim!.ldesigns. Special conditions warranting other locationsof inlets shall be determined on a case by case basis cythe County Engineer. 'rYPe "BB" inlet or equal is to beused as a curb inlet on curbed streets. The capacity ~f

a type "BB It inlet is 5 c. f. s , All inlets are to beconstructed of brick masonry, cast in place concrete or

-23-

may be precast as approved by the County Engipee=. G=a~e

top inlets are not permitted to be used in unlined openditch areas. The County Engineer shall stipulate thetype(s) of inlets that are preferred in these ditches.

. .

-24-

· .

SECTION VII

SANITARY SEWER DESIGN REQUIREMENTS

.,....-

SECTION VII

SANITARY SEW-~ DESIGN'REQUIREMENTS

1. Sanitary sewers shall be designed in accordance with the Cit:~·

of Houston, Department ot Public Works, "General Desicrr:Requirements for Sanitary Sewers, Stonn Sewers, Waterlines arl':.Paving."

. .

-25-.

· .

SECTION; VIII

WATERLINE DESIGN REQUIREMENTS

SECTION VIII

WATERLINE DESIGN REQUIREMENTS

1. Water lines shall be designed in accordance with the City elfHouston, Department of . Public Works, "General Desi~jIi

Requirements for Sanitary Sewers, Storm Sewers, Waterlines andPaving" .

-26-

..

. .

SECTION IX

UTILITY INFORMATION REQUIREMENTS

SECTION IX

UTILITY INFORMATIONcREQUIREMENTS

The following provisions outline the responsibility of t:r.eConsulting Engineer with respect to utility infonnation to beincluded in the design phase ·of engineering contracts for bor.dprojects with the Harris County Engineering Department.

A. it shall be the responsibility of the Consulting Engineer t.oinclude all existing utilities in the plan and profiledrawings of both the preliminary and final design phases clfthe proj ect. Such inclusion is considered to be aprerequisite to approval of the drawings by the Harris CountyEngineer.

utilities to be included in plan and .p~ofile drawings are e.sfollows:

t.cparallellinesandcrossingsroad-Pipelinesright-of-way.

-Power Lines - aerial (pole. lines) and buried.

-Telephone Lines - aerial (pole lines) and buried.

-Water Lines - municipalities, water districts and privatelyowned.

-sanitary Sewer Lines - municipalities, water districts andprivately owned.

-Gas Lines - mains and service lines.

-Miscellaneous television cables, microwave facilitiE!!;,valve and compressor installations for pipelines, sanitcl.J:'ysewer lift stations, and any other utilities on or adjacent 1:0the project insofar as they are pertinent.

B. The responsibility for showing all utilities on drawiI'lq'sincludes .those located on any off-s.ite drainage facilities orside roads which are designated as part of the, project.

c. A detailed listing of all utilities and specific locations c,fknown conflicts shall be required to accompany presentation c,fboth preliminary and final design drawings.

D. A sign off area (example attached) which verifies utilities '::0

be shown on drawings shall be included on the cover sheet i::>fthe final drawings and the signatures. of representatives ,::>fthe utility companies involved will be required' prior '~o

approval of the drawing~.

-27-

E. In addition to the areas of responsibility listed above, the consulting Engineerwill be expected to:

1. Attend meeting with utility companies subsequent to the preliminarysubmittal for the purpose of discussing either relocation of utilities ordesign changes to eliminate conflicts.

2. . Make every possible effort to include in the plan and profile drawingsthose utilities installed on the job site between the time of initiation andcompletion of the design drawings.

F. Provide a note on all plan and profile sheets with utilities, warning theContractor that when work is done in the vicinity of any pipelines he shallcontact the respective company (names and phone numbers).

G. Provide a listing of all utility owners and pole numbers for each utility pole inthe R.O.W. limits throughout the job. This listing is to be provided in thePreliminary Engineering Report.

Revised 2/4/99PDG/jlm

,_.~

PRIVATE:

· .

UTILITI::S SHOWN

::'" ,-Of i ~ • _

SO~f'iWl:"-S I ;.=w~

I·' ~ON! c=.

HOtS7'ON UG"',;-:-'!NG

ANO ~-e c::.

w. Co; L :. ~. ----------------=:. -----------------

-29-

· .

SECTION X

CONSTRUCTION DRAWING REQUIREMENTS

SECTION X

CONSTRUCTION DRAWING' REQUIREMENTS

Following are requirements for the preparation of const:::ucticmdrawings:

1.. The title sheet is to show road name and county road numcer ,limits of proposed construction, fund out of which till!construction is to be paid, date, names and job titles of thl!county Judge, each c01nJllissioner and County Engineer wi1:happroval locations for the County Flood Control Engineer. s eualso the requirements of the utility section of thesl~

guidelines. The title sheet is also to include an index c,::drawings. The required format of the title sheet is' attach~ad,

hereto.

2. The plans 'are to include pian-profile ~h~ets and cross-secticJIlsheets. Cross-sections are to be drawn at maximum 1.00-foc,1:stations and other intermediate locations as required 1:c)adequately show specific construction of significant changtal;in elevation. The cross-sections shall be drawn to apreferred minimum scale of :l-in~h equals S-feet. Dirt wO:J::,lcshall be computed by the method of average end areas from thf~

cross-section. The volume of cut and fill shall be sho~ll7n

between each station and totalled at the bottom of each sheet:.

3. The seal, date and original signaturerequired on each sheet. The Engineerstick-on or embossed imprint of his/herseal must. reproduce on prints.

of an Engineer i:;may use a stamped,seal. However, th,a

4. A bench mark elevation and description is required on eac.rsheet (should include latest'year of adjustment i.e., 78, 7:3,64, etc.). See number 26, below.

5. Label each plan sheet as to street widths, pavement widths andthickness, type of roadway materials, curbs, intersecticJ:lradii, curve data, stationing, existing utilities-typl: ,.location, etc.

6. Stationing must run from left to right.

7. A North arrow is required on all plan sheets.

8. If a roadway exists Where plans are being prepared to improv:or construct new pavement, this roadway should be labeled a.sto its existing width, -t;ype of surfacing and base thicknes:s,if available.

9. Do not place match lines in intersections.

10. All utility lines, regardless of size, shall be shewn in th,~plan and profile.

-30- .. -

11. Sho~ flowline elevations and direction of flow fo= al:existing and proposed ditches.

12. Show natural ground profiles at each right-of-way· or easementline. centerline profiles will be satisfactory for rights­of-way or easements except where there is a difference of 0.50feet or more from one right-of-way easement line to other, inwhich case dual profiles wilr be required.

~3. Make a recommendation for resolving all known conflicts ofproposed utilities with existing utilities.

14. Plans shall be standard 24-inch x 36-inch overall dimensions.

15. Details of special structures not covered by approved standar~

drawings, such as stream and gully crossings, etc., should bedrawn with horizontal and vertical scales equal to each other.

16. All street and/or road alignments shall be shown on plans.

~7. Plans shall be drawn to accurate scale, showing proposedpavement, typical cross-sections and details, lines andgrades, and all topography within the right-of-way. Atintersections, the cross street shall be shown at sufficientdistance in each direction along the side street for designir:gadequate street crossing.

18. Curb return elevations for turnouts shall be shown in the planand profile.

19 . Grades should be labeled for the outside top of curb except C.trailroad crossings. Centerline grades are acceptable only I:Clrpaving without curbs and gutters.

20. Gutter elevations are required for vertical curves where arailroad track is being·crossed.

21. The surface elevation at the property line of all existingdriveways should be shown in profile .

.22. Station all esplanade noses, both existing and proposed.

23 . The design of both roadways is required on all pavememtsections with an esplanade.

24. station all P.C. IS, P.T. IS, radius returns and grade changeP. I. 's in the plan view. Station all radius returns and grciciechange P. I. 's in the profile, with their respecti'reelevations.

25. The standard scales permitted for plan and profiles of pavingplans are as follows:

1 .. 2' vertical1 = 20' horizontal

-31-

These scales are the minimum and larger scales mal be used ~::i

show details of construction.

26. FEMA has established bench marksetc. Where these bench marksconstruction, it will be sodrawings.

on County bridges, culve=ts J

are to be relocated durincrnoted on the constructiCJil

27. The following is a checklist for drawings of prestressE~d

multi-beam box girder bridges:

NAME OF BRIDGE/STREET

ROAD LOG NUMBER OF BRIDGE/STREET

NAME OF BAYOU, STREAM, DITCH OR H.C.F.C. DITCH NUMBER.

DATE

CHECKED BY

TITLE SHEET

a. Date

b. Index

c. Location Map

. ,

d. Name of street and road log number

e. Number or name of ditch or creek

f. Precinct

g. Fund

h. County JUdge, Commissioners, Engineer and Auditors Name

i. Approved signatures, where required

BRIDGE LAYOUT

a. Length of bridge I ·length of approach' slab I width c,froadway, width of curb and sidewalk

b. Station at C.L. of each bent

c. Elevation top of cap and bottom of cap at C. L. on bent'detail sheet

d. Elevation top of decking at C.L.

e. Rail post spacing

-32- . ..,.,..

f. Traffic lane marker or paint spacing

g. Location and elevation of benchmark used (USGS) of Cityof Houston

h. positions, sizes and length of piling (or drilled sha=-tand underreamed footin<i). pile schedules shall be on theabutment and bent deta~l·sheets.

i.. 50i1 profi1e to be attached at the end of thespecifications as an appendix.

length ofnecessary

j . Proposed slope and width of channel and theproposed improvement of channel. Show allslope protection.

k. Design criteria (showing design 1oad, either H20 or HS20)

1. Scale for plan and profile - 1" .. 10' horizontal andvertical.

m. North arrow

n. Transition from new bridge roadway to exis~ing width ofroadway

o. Construction Notes:

1. Contractor to contact utility coordinating committe:E48 hours prior to commencing any work.- GiVEtelephone numbers for contract.

2. Payment for removing structure (if any)

3. Payment for backfill

4. Payment for approach slab sub-base

5. Payment for materials required to tie approach slcLl:)to existing road and transitions to existing road.

6. 3/4" chamfer on all expos~d corners.

7. Notes are sometimes needed to indicate limits fC::l:~

some items.

ABUTMENT DETAIL

a. Plan and elevation view (showing spacing of beams) all'ldbearing pad outlines.

b. Positions of piling (or dri1led shaft), in plan a:n::ie1evation views

-33-

c.

d.

e.

Sections at C.L. showing reinforcing steel, app:::-oach sl2.=and j oint detail. Tvlo or ~ore sections may be requiredfor retaining walls.

section at sidewalk showing reinforcing steel

Sections at wingwall s~owing reinforcing steel (a minimu~of two sections, one cross-section and one longitudina.1section is required).

f. All reinforcing steel shall be identified as to size anc,spacing

g. Scale for each detail.scale".

Do not use the term "not t:CI

INTERIOR BENT DETAIL

a. Plan and elevation view (showing spacing of beams) anc.bearing pad outlines.

b. positions of piling (or drilled shaft) in plan anc.elevation view.

: :

c. section at C.L. showing reinforci'ng steel and connect.a.cn :of box girders (fixed or expansion)

d. All reinforcing steel shall be identified as to size arielspacing

e. Scale for each detail

f. Pile schedule

g. Beam seat details for abutment and bents

h. General Notes - Class of Concrete and 28 day streng;:hetc.

BENT GIRDER DETAIL

a. Box girders layout (plan)

. b. Deck Section (elevation) showing C. t. of roadway,girders, decking and its reinforcing steel, curb aridsidewalk, slope of roadway, drain holes, etc.

c. Typical section of box girder showing spacing and size 10 fprestress strand, prestress force, stirrups, dowels,' bo:n ibreakage, etc. Deflection tables shall be included onthe plans to ensure that proper stressing is employed inthe box girders.

d. All reinforcing steel shall be identified as to size andspacing

-34.-

e. Reinforcing steel dimension detail and bar benc.:"ns,details, where necessary

f. connection between box girder (grout key, shear plate)

g. Scale for each detail

h. Cross-section of bridg·e ·showing deck slope, number of boxgirders, sidewalk reinforcin.g det~il and guard rail~.

connection.

i. Bearing pad details

PILING OR DRILLED SHAFT AND UNDERREAMED FOOTING DETAIL

a. Reinforcing detail (for piling or drilled .shaft) ,including cutback and buildup details

b. piling handling detail

c. Underreamed footing detail showing base diameter, angl.~

of bell, etc.

d. General construction notes

RAILING DETAIL

a. Plan and elevation view showing spacing of rail posts

b. Any necessary detail based on type and material ofrailing; this should include detail of connection ofposts and bridge, connection of posts and rail, etc.

TRAFFIC BUTTON DETAIL

a. Plan and elevation showing dimensions using standardHarris County detail

b. Specify type and color of button surface (e. g.glazed ceramic surface).

white

BRIDGE PLAQUE

a. Check all names to be sure they are current and up todate.

b. Note for Contractor to submit a rubbing or pl aque :f:clrapproval

c. Location and method of mounting

d. Use Harris County standard plaque drawing

-35- .......-

MISCEL~~EOUS DETATTS

a. Armour joints

b. Drains

c. Slope paving . .d. Approach slab

29. NOTE: No changes shall be made to any Harris County Drawinq~~.

at the direction of any other agency or department without thEldirection and concurrence of the HARRIS COUNTY ENGINEERIN(~

DEPA-'Q..TMENT .

-36-

Th. +ollO'winr; t;rccnic: S'1'onc:c:rc:::s Tor plen arlCl pr'~i Ie sne r : COly ~o e i t

c:rawinr;$ oT 1· - 20' ,seol.. • •

.-

....

PrOCler"T)' Line

oiTc::ne,s. Le+1' end R i grrt(~r'.enond)

CenTer' L. i ne aT Ri Ql"'lT-O+-Wa)'

Tr'Clt'I,siT L.ine

-----------'~"'-'~ --- -- - - -____'1 ~ _

Fenee Line

CUr':l L.ine

-/1----/1--- -)(.....---)(-

...... -------------.---._----EdQe oT A,sonClIT(F,..••nc::ndl

EdQe 0+ Snel I Or' Cr'ovel

Oimen$ion Line

Theor-eTic:ol Prooer~y I in.

WI I))' 1/1; Jill

H.L.. & P. CO. CondUiT

Cos Lin.

W.,sTern Un i on Conc::l.li T

s. 11. 8. T. Conc::l.lj T

Rai I r'OOd

LOT L i ne,s

WCTc:n Line

Ceo I e TV

".1..4 ,. ""_0 01-.._·_"_· _.- ....... ~- ~

s, w. LT. c:.o. I. MC:l ~"- M.----:--I....!....r------

-37-

I=' i I I E~etr.errr

Orainaoe Ea3emen~

•

2.·C--d I 1~ . !...~ r er .c:-rer ~

; 30· (end -;-c::roer 1 'c:-rer J

SQ7'1 i ~cr'i S...r Line

30· (and I ar-oer 1 SCIn. Sew.:;;'

S1'crm Sewer'" Line2.· (--- S_ .... SIT'e I let'" 1 1'm. Sew.-....

s 30· (~d I ar-oer 1 S1'm. S.w. 7'

Iron Pipe or ItonRod Monuments(Red Ink forProperty Corner)

Water Vclvew.v.-- •(Gate)

Water ValveI.'.w.v.-- •(Butterfly) +,."'.

rite Hydrant • •.v.--i Q;:lQinq Sleeve -- ;¥:;:&I Valve I 1.S.• v.I

Reducerr r-- .,

Round Connections ~_r__

Sanitary SewerYi

),lannole and c:.o. IU(.

Cleanout • •Storm Sewer IU(.

Wanhole •Storm Sewer ,. ..... .....Nei

.i1iets - _.

CuNer~ Pipe 14~.(- -=--=--:lT0;1 of CJrtl or L!£:7U6]G4JUer Line Elev. t=:!.:;;- J

? ,

•'2

c:.v.

•

o

I"/;";~f?e::=::~~}~'''''Y ..

"'Sly."'.~

C : :=:::::: ~

G4s ),leter

Point of Inter­sedion (P.U

Point of C;,;rveP.C. of Curve(P.c.) or Pointof Tanqerll::Y (P.TJ

Power Pole ..

Power Pole • / Down Guy !

Water Meter

eunc6nqTr~

Header

Hedge

-38-

PrQ"fi Ie Vie.

Hc:r-m cr E=1' PrQC)""1'~ L.ineI"

L. ine .So..rt1'I cr .es1' PrQC)er-T'~,..Ha-m 'cr ''£=1' Ci1'CM cr C1.lM)

"SQU1'r'l;.s::r ...es1' Ci1'CM cr Cur:l .'

","

- .H.L.. &~. Ce. CondUit

Ccs L.ine

WeS1'ern Un i a'l

S••• B.T. Ccne...li't

-"2 -- ?M.~. &. ,. eo. WTO

5 ... M.... 1m_ Go.- )

')" ,...,...,., Un.1~ \

r=-----------3S••••• r. , IoCl

?

S I .. I~. 2.· 1_ Sofa""" Sa". s.... )

J uU,.. 30· • _ I.cr;... I Sa". S-. ?

SS III I.,.. 2.· 1_ S-II.. I S""- S-.

d ?bl• .,. 30· 1_ I....v-- I $""- S-.

HOTE: .Pi~. less Tnan +~ imcnes l~"l in diame1'er need nc-r oe.:'\o-n i n ~r c-Fi Ie.

-39-

.....H. L. tL i~. C~. ..annQ Ie

(

~:

s.w.a.T. "aMMO ••

-----J.k -----

::---- .,]~ ~--- L--- --Sen i Te:"'Y Sewer" ),lQMrtQ I.

and C lecnO.I'T

S'TO""m S.~t" ),lcnrtQ I.

,;. ..

\\--

c

-40-

Pion vi ....

L

-aT8r Valve (CaTe)

WaTer Valve (au~er~ly)

Tapoin~ Sleeve one V~lve

2~· (and Smol ler) Wc~e~ Moin

30· {and LarQe~) WaTe~ Moin/ - ---~

-----~Jf VI.V.

__~j:f B.F.W.V. __

l' T.S. & V.

F.H.

W.V.

Pro-f i I e Vi ....

WaTer I.. ine

--t:>--8"

ALt. SIZES

-41-

Plan Vi.""

...San i -rr::r'j S4twet" L. i nes

..c::nnole

Sani-rr::r'j S."".~ L.ines

-0--

S 24" (and Smeller) Son. Sew.)

) 30' (and larger I Son. Sew. )

t

-42-

Plc:n Vie"

..S~~m Sewer Line~

f'

~.

I>.),&QMt'IO I e

Inle-rs

Pr o-fi I e Vie..

ST~m Se..er Line~

~Q1"lI"'lOle

Inle-r$

-.-. .

24· (and Smol le~) Stm. Sew •

I

-------(o~------

·e-s·· INLET), I , _

S 24 M ( ond Srn.:: I I e~ ) S'tm. Se.... )

) ~30· (end Lc:rQe~ ) Stm. Sew.

~s::1

-43-........

·~

F'ace o-f.'-ur"l)'.

Eaoe o-f Povemsrrt

..

4' Cone. Wolk -~1

T 0Ci of CUt"'O orGu~~e~ Elev~ion

?ro-fi I. View

T ee Of CUt"'l) e::r Cerrte~ Lineof Ooen 0 i ~CM Pov i no

j'

IT.C.=76.85 I IC;.=76.35 I

-44-

JOB TITLE AND. DESCRIPTION

.CI' .. ~ __ .....,.. __ .. _~-

I'lWAIE UlLillS 510NHI

MJUI .... u.,........... t...... «I, __ -- - - -.--

I

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ntgwtO Po 00:::=5=5 _CGUN.. (Ha.1II

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I COMPANY LOGO , TITLE .I, H~;If I/'I'll'; I' r !'I'III., IIAIf, AlII I !;Ilill A11111 f I

"II

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"""00'" .1 ----------

tJtA.f~Jjlt'Wiclldr_J._f·l~A.C.;:;.K~__cQUtln .WIOIl

COUNTY OF HARRIS TEXAS

TOM UA5S&iiiiiiioii'- -tAlC-IHC-I-.-

DONO YEAR & FUIID '..ROAD, AND DRIDGE NUMDEn

•u

\;~I.T -,,~1- \ I~':-=-

/1~:\J

'!4

f;:u

]I~OUlLr!ll°~l 0c

~I~~I~m~

o

~I~

-f~l.1Ji• ~l L_il';~ ;1' II.'1) !

rl

""1-\ .c.... ..... i rie de-,... ....~b-- t;.,- :m~n~m"- ....e~'.; .... erne ...... s .::_.~ .. ~.',:.:•• e 1.. O.L.LcWl.ng oU",.J.J.. ;:, .... _.:.. <:::::> J. ...~ ......:. ..........., - -:--- ,...... ,-

mandatory 75 and 90 percent plan review submittals.

Intermittent reviews and conferences will be requested Whl~:~

necessary. The Engineer should check the construction dra..,inq-:;against this outline for inclusion of these items prio~ 1:Dsubmitting drawings for respective reviews.

MinimUJl1 Require:ments for 75% Pl.an Review Submittal.:

A. Title Sheet.

B. Complete Drainage Area Map with contours.

C. Typical. sections.

D. Plan/Profil.~ Sheets.

1. Storm Sewer size, alignment and profil.e grade, includinqhorizontal and vertical ties.

2. Utility lines, size, horizontal and vertical alignmel1':and description. (Util.ity confl.icts must be identified) .

3. Plan/Profile of proposed and existing roadside ditchels I .,

outfal.ls.

4. Existing pavement widening areas.

5. Proposed pavement alignment and profile grade.

- E. Bridge drawings, preferably with superstructure lOO percentcomplete and preliminary layouts of the substructure.

F. Intersection schematics.

G. structural details.

H. Limits and details of retaining walls.

I. Detour plans.

J. Cross-sections (inclUding underground utilities such as -stormsewers, water mains, etc.,).

K. Soil boring and bridge foundation recommendations.

L. Define additional right-of-way requirements (inclUding alleasements, rights of entries, etc.).

M. Preliminary construction quantity estimate and constructioncost estimate.

-46-

N. Cons~~~c~ion sequencing.

o. Traffic signal design should be submitted where applicable.

Hinimmn Requirements for 90% Plan Review Submittal:the 75% Plan Review, plus:

(All items ill

A. Design plans and calculations/construction specifications andcontracts and bid items.

B. Title Sheet complete.

c. Typical sections complete.

D. Intersection, cross street geometries and grades complete.

E. Drainage details (including j unction boxes, modified inlets .:etc.) retaining wall and bridges complete.

F. Traffic detour plans complete.

G. Signing, lighting, pavement markings should be included illdesign docmnents.

H. Traffic signal design complete.

I. Supplemental specifications,notices to contractor.

~pecial provisions, specLa.t

J. construction sequencing, if required.

K. Quantity take-off indexapproximately 90% complete.

-47-

to Contractor's pay itel:Il::i

· .

SECTION~ XI

SPECIFICATION REQUIREMENTS

--

SECTION XI

SPECIFICATION REQPlREMENTS

1. The Engineer is required to furnish the County Engineer ia.;

many preliminary specifications, for review, as the ceurrcyEngineer deems necessary. 'too produce a final acceptabl~

approved set.

2. There are certain specifications pre-printed and available at:the office of the County Engineer to produce a finalacceptable approved set. These are listed below.

3. Each and every bid item on the bid proposal form sh~ll have acontrolling specification in the "Project Manual".

4. The

a.b.c.d.e.f.g.h.i.j .k.1.m.n.o.p.

following is the "Project Manual" format and sequence:

Specifications and Bid (Front Cover)General Notice to ContractorsLetter of EvidenceBidder's certificationBid to Commissioners' CourtContract with Harris County (Two Copies)Notice to ContractorsBid SheetSpecial Notice to ContractorsGeneral Bond InformationPrevailing Wage RatesFinancial Statement (Four Sheets)Harris County General Requirements and CovenantsSpecial ProvisionsSpecial'SpecificationsGeotechnical Report (If Available)

constructionThe Harris county Engineering Departmentspecifications will be in a separate volume.

s. The following is a listing, by i tem,of the Harris countyEngineering Department specifications that can be furnished tothe consulting Engineer.

CONSTRUCTION SPECIFICATION INDEX .

Item No.

102

104

110

Title

Clearing and Grubbing

Removing Old Concrete

Roadway Excavation

-48-

Crushed Stone Base Course

Ti"C.le

Fly

Cement

Fertilizer

Hydro-mulch Seeding

Cement StabilizedStone ·Base Course

PortlandSubgrade

Lime-Fly Ash orStabilized subgrade

Base Repair with Hot Mix HI:r::Laid Asphalt Concrete Ba:s,:Course

Stripping'

Subgrade

Lime Stabilized Subgrade

Hydrated Lime and Lime Slurry

Channel Excavation

Furnishing and Placing Topsoil

Borrow

Seeding For Erosion Control

Sodding For Erosion Control

Embankment

Hot Mix Asphaltic Concre1:i~

Base Course (Black Base)

Item No:

120

130

132

160

162

164

165

166

200

205

220

221

222

223

230

231

250

251

310 Prime Coat

320 SingleTreatment

Course Surface

322 Two Course Surface Treatment

323

324

Emulsified Asphalt Treatment

Seal Coat

-49- .. -

Structural Concrete

Prestressed Concrete Units

Tunnel Construction

Drilled Shaft Foundations

and

Asphal":.ic

Undergrou;nclof

Excavation

Boring or Tu'nneliIl~r

Concrete Structures

Extending Concrete Structures

Steel H Piling

Well Pointing

Concrete Pavement

Prestressed Concrete Piling

Hot Mix-Hot LaidConcrete Pavement

Cement stabilized Sand Beddinqand Backfill

Trench Safety Systems

Timber Ordered Left In Trench

Title

Driving Timber Piling

Driving steel Piling

Driving Concrete Piling

Treated .and Untreated TimbeJ::Piling

Steel Sheet Piling

ConstructionUtilities.

Jacking,Pipe

Bank Sand Backfill

. StructuralBackfill

Item No.

340

360

400

402

403

404

405

407.

408

409

41.0

41.1.

420

421

423

424

429

430

431

432

433

435

436

.-50-

. .

Steel structures

~imber For Structures

ProtectiVE!

Heavy

and

Metal For Structures

Clay Pipe

Hardware ForConstruction

Corrugated Metal Pipe

Elastomeric Materials

Timber Preservative andTreatment

Timber Structures

Reinforcing steel

Title

Reinforced Concrete Pipe

PaintingCoating

Concrete and Steel Railing

Structural' Bolting

Structural Welding

Preformed Joint Seal

Polyurethane Joint Seal

Remove and Dispose of Existi:n;Concrete or' Metal Pipe

Safety End Treatment

PVC Pipe

Removing and Replacing DamagE~d

'Railing

Removing Railing

Temporary Railing

Aluminum Bridge Railing

Item No.

437

438

439

440

441

442

445

446

447

450

451

452

453

454

455

456

457

458

460

461.

462

463

464

465

-51-

Title

Erick Manholes

Inlets

Precast Concrete Manholes

ccncxet;e

Testing

and Reloca1:1!Signs, Mail Eoxe:; ,Signs, Light ant!

Signal Poles

Monolithic Reinforced Concre1:uBox Sewers

RemoveRoadwayTrafficTraffic

Adjusting Manholes and Inlets

Low Pressure Air Test-Sanit.az-ySewer-Lines

Precast ReinforcedEox Sewers

HydrostaticPressure Lines

Reinforced Concrete Slopu.?aving

Removing old Structures

Item No.

470

47~

472

473

476

477

480

4S~

491

495

500

502 Earricades, Signs and Traffic:. Handling, Including Type I:r:cEarricades

50S Constructing Detours Fl::>::-Maintaining Two Way Traffic

510

515

Flagmen

Roadway Shell

516 Flex-Beam Guardrail

520 WeighingEquipment

and Measuri:n :I

526 Meml:Jrane curing

530 Concrete Curb,and Gutter,Driveways

Gutter,Sidewalks

Cur::>a:n:l

-52-

· .

APPENDIX

Title

Wheel stops

Fencing Removal

Roadside Traffic Sign Suppert

Barbed

Lens ReflectbmFor Traffic Centre):.

Coloring Concrete Medians anc:Sidewalks

Esplanades, Medians andDirectional Islands

EnclosedSheetingSigns

Clearing, Grubbing and Fencing

Wood Fencing

Chain Link Fencing

Clean-up

Aluminum Signs

Four Str.andFencing

Item No.

535

536

537

550

551.

554

555

556

560

624

646

647

658 Delineators and Object Markers

660

661-

Traffic Paint Striping

Traff-ic Paint

662 Glass Reflective Spheres Fe:>:::."Traffic Paint

663 Traffic Buttons and Pavemen":Markers

665 Temporary ~nd

ReflectorizedMarkings

Removabl,aPaveme:n::

.- -_:,-.

-53-

.. -.-

APPENDIX

In addition to the guidelines outlined prior to this appendix,the following manuals, design requirements and guidelines a:~E!

offered herein as references. The design requirements of thel:'E!references, where applicable, shall be used by Engineers havi.n«contracts with Harris County. ..

A. "General Design Requirements for Sanitary Sewers, StornSewers, Waterlines and Paving" , prepared by the City C:l::Houston Department of Public Works.

B. "Roadway Design Standards", prepared by the City of BoustC:ll1Traffic and Transportation Department.

C. "Geometric Design Guidelines for Subdivision Streets, Barri:.County·and City of Houston". . ,

D. "Guidelines for Major Urban Street Designs", prepared by thlaInstitute of Transportation Engineers, 1984.

E. "Texas Manual onprepared by theTransportation.

Uniform Traffic Control Devices (MUTCD) 111 •

State Department of Highways and Publil:. :

F. "Standard Highway Sign Designs for Texas", prepared by thlaState Department of Highways and Public Transportation.

G. "Highway Design operations and Procedures Manual 2-76", a.sprepared by the State Department of Highways and Public:Transportation.

B. "Hydrology Manual for Harris County, Texas", prepared by t])laHarris County Flood Control District.

I. "Criteria Manual for the Design of Flood Control and Draina9=Facilities", prepared by the Harris County Flood Contrl::>lDistrict.

-54-

AJ. Ho!..L!'s' c.1"..'-­Fim Aui.uaIU

Coturry /Wdiwr

1001 Preston, Suite 800Houston, Tezas 7iUC:

(713) 221-6505

J.F. FLACK, c.P.A.

liARRIs COUNTY AUDITOR..Ju ly 24, 1989

Mr. James R. Adams, County EngineerHarris County Engineering Department700 Harris County Administratio~ Building1001 PrestonHouston, Texas 77002

Re: Time Card Documentdtion Requirements of Sub-Contractorsto your Engineering Consultants

Dear Mr. Adams:

The County Auditor's Office requires that all invoices from your Engineeringconsultants for "Compensat i on Due for Additional Services and Charges" submitted bytheir sub-contractors be accompanied by properly documented time sheets of theindividuals who performed the work. An example would be charges for field surveyswhich are billed as salary cost times a multiplier. The time sheets should besigned by the individual doing the work. and by his or her supervisor. The signat­ure of the consul ti ng engi neer who authori zed the sub-contract work. is not requi redon the time sheets as long as he or she sign th~ invoice.

The County Auditor's' Offi ce also requi res thi s same ti me card documentati on prOCE~­

dure of your materi a1sengi neeri ng and testi n9 servi ces and surveyi ng contr-actor-swho are billing the County on an hourly basis for their engineering and technii­cian's services, both for field and office personnel.

Ti me sheets are not requi red of your engi neeri ng consul tants who perform theii T .

professional serv'[ce on a percentage fee of the total construction cost of theproject•.

A similar procedure of time card documentation was implemented with the Fl cocControl District on November I, 1987.

We recommend that you initiate this procedure on all new contracts with yourprofessional consultants beginning Aug~st I, 1989.

Yours very tru.ly I

,r:l::Jb4/Lfff F~:c;

County AuditorJFF:AHK:jlahk;9.1

-55-

.,....-

PLAN

1. Scale: 1" c 10'

2. Show existing topography an~ contours.

3 • Show any proposed channel change or future channel with flo~N

direction.

a. Beginning and end stations

b. CUrb or sidewalk width ,

c. Roadway width

d. overall width

e. Armor joint locations

f. Skew angle if skewed

6. Show existing or proposed approach pavement and approachslabs.

7. Show any proposed riprap or slope pavement.

8. Guard beam layout.

9. Soil boring locations.

10. Show any horizontal curve data.

PROFILE

1. Scale: 1" z 10'

2. . If bridge is normal, show true elevation.

3. If skewed, show section on GL.

4. Existing ground line at GL bridge.

5. Beginning and end of bridge stations with proposed elevationlS,

6. Number bents, show fixed or expansion conditions.

-56-

J >

8.

9.

~O.

proposed profile grade with vertical curve data.

Span lengths and descriptions.

Overall bridge length.

pile type, size, number and lengths.. .

ll. Or drilled shaft diameter and lengths.

l2. Rail type and post spacing.

~3. Soil boring logs.

~4. High and normal water elevations.

~5. Horizontal clearances if over roadway or railroad.

~6. Mini~um vertical clearances if over roadway or railroad.

17. Guard beam post spacing.

-57-

·:-.....'

J-,

1 AIJ-LJ1!J U J G UJ\ {l!J'jV 1'0'

MAJOR STREETS (D.ESCRIPTION) 1LOCAL STREETS (DESCRIPTION) 2MAJOR STREETS CROSS SECTION 3LOCAL STREETS CROSS SECTION 4INTERSECTION DESIGN FOR DIVIDED ROADWAY 6GEOMETRIC DESIGN STANDARDS FOR ESPLANAPE OPENING 6DESIGN STANDARD FOR SPACING OF' ESPLANAJJE OPENING 7LEFT TURN LANE DESIGN 8LEFT TURN DESIGN FOR MAJOR STREET 9LEFT TURN LANE DESIGN FOR PRIVATE DRIVE;n'A YS 10ESPLANADE TRANSITION DESIGN FOR RESIDEN1'lAL ST 11ESPLANADE TRANSITION DESIGN FOR NON-RESmENTIAL 81' 1240' TO 27' PAVING TRANSITION DESIGN 13CUL de SAC FOR RESIDENTIAL STREETS 14CUL de SAC FOR NON-RESIDENTIAL STREE1'S 16DESIGN STANDARD FOR CUTBACK FOR PARALl,Ji,'I, PARKS

ROADWAYS WITHOUT CURB AND GUTTER 16ROADWAYS WITH CURB AND GUTTER 17

ELONGATED WORD AND ARROW SYMBOL DESIGN DETAIL 18STANDARD FOR UNDERGROUND ENCROACHMEN7' 19PRIVATE STREET TERMINUS STANDARD 20PUMP ISLAND LOCA110N FOR DRIVE-IN STORES 21STANDARD FOR PAINTED LEFT TURN CHANNEl.lZATION 22

I

I.~ . I

IV/A JU/\ :J/I\t.t./:J

The gromolric closign standards, cross soc lions and rlght-'of--way wldhts IIlustraled In Ihls book areestablished to provide maximum use of righI-of -way for Ihe safe and efficient movement of Irafflc.The design standards are grouped Inlo Ihree calsslflcallons:

Mojor Slr nnl s or Thoroughfaresl ocul Siroots for Resldenliol UsnLooal Slre e ls for Non-Residential Use

MAJOR S.TREETS OR. T110ROUGHrARES.

1II

I"

60 fl. Right-of-Way

80 fl. Right-of -Way

90 fl. Right-of -Way

100 fl. Righl-of-Way

120 fl. Righi-of ··Way

150 fl. Righi- of··,Wl1Y

A 44 fl. wide roadway wllh curbs Is. recommended In an exlsling 60 fl. rlght--ofwaywhere Ihe acqulsillon of addillonal rlghl-of-way Is nol economlcoly feasIble.See figure A, Page 3.

Dual 23 fl. wide roadway wllh curb separaled by n 14 fl. esplanade.See figure· 8, Page 3.

Dual 23 fl. wide roadway wllh curb separaled by a 24 fl. esplanade.See figure C, Page 3.

Minlmu·m rigth-of-way wldlh required for a deslgntlled molor Ihoroughfare. flrsl slogeroadway development Is dual 23 fl. wide roodway wllh curbs separaled by a 34 11. 1!srlonadeSecond sloge roadway developmenl Is dual 33 fl. roadway wllh Ihe additional width lakenfrom the esplanade. See figures 01 and 02, Page 3.

Flr sl slage roadway developmenl Is dual 23 fl. roadway wllh curbs separaled by a54 fI esplanade. Second and third slages roadway- developments, dual 33 1.1. or 43 fl.roadways wllh addilional wldlhs taken from the esplanade. See figures [1, [2 and E.3,Page 3.

first stage roadway developmenl Is dual 23 fl. wide roadway wllh curbs separated by a66 fl. esplanade. Addilional lones, taken from. the esplanacie, are added as necessaryto accommodate Increased traffic flow 01 Inter slage. See figure F, Pogo 3.

rI__ L__

LOCAL STREETS (Residential)

'-""'" ~f'lL- ,'II\LL I-J

50 ft. Righi-or-Way

55 fl. Rlghl-of-Way

60 fl. Right-of-Way

LOCAL STREETS (Non-Residential)

50 fl. and 55 ft.Rlghl-of-Way

60 fl. Right-of-Way

27 fl. wide roadway wIth curb Is racornrnenrl-td. Lol with 01 rlghl-of~way cannolbe less Ihan 40 II. See F1gur l ! A, Page -1.

27 ft. roadway with curbs. Mlnurnllm 35 ft. wIde r9adway with curbs when edlncen!properly Is sIngle family resldrullcl with 101 wldlhs al the right-of-way line lessIhan 40 ft. wide. See figure 8. Page 4.

27 fl. wide roadway with curbs. Minimum 3~ ft. wide roadway with curb when 101wldlhs at Ihe righi-or-way lino Is less lhun 40 ft. See figure C, Page 4.

35 ft. roadway wldlhs with curbs where the (,dlacent properly development ,Is apartments,busslnesses, schools or parks und ccqulsllton ad additional right-of-way Is noleconomically feaslblo. See flguln 0 and E, Il a ge 4. .

40 ft. wIde roadway with curbs where the odjocenl properly developme.nl Is aparlmenls,businesses, schools or parks. See figure r I Page 4.

I

I" _"

I I

I 2 J

IV!ILl (J 1'\ "J I 1'\ t . I I ! \" CJ "J. ' ,,) 1::- L, I I U /V::JI

90' R-O-W_____• 0 _ .• _~ t I

". ~J i "'I-"~-t ,~. t ". ,1 10' J- 2'

.I { !I '1', ...__. .J iJ:-, (' I 1.__ == . .... _....-~ "..~'J

Sidewalk Sidewalk

~ 80' R " W

l'" rH' t I~'!- 23'

i.1

). 'I I' ;"-: ...I ..

I .. _ __ . 60' .R.:O.:..W ..... _ .. _. ~

r ". __. 1 ,. I8' .... --.. -- - -:---- 4 '11 H

l_L~cc:~.- .. - -"C;"•••,._. __ ...-

(Figure A) 60' R-O-W - 4 Moving Lanes (rigure 8) BO' R-O-W - 4 Moving lanes (figure C ) 90' R-O-W - 4 Moving Lones

,~

3.3:-r'T-~,3~-.-.. j ~O:l~ l'--.. -;,." '\' I

.... Sld.wolkI=--

~ _ .__. 10.~R-=Q:.W_ _ __ .

lIn' r'I- 100' R-O-W .J----- ._.0- -_.. --'-- . ._. 1

.-1 rc: ~__--2..3~_-~~.~~_.--t... 23' ,~ 10' t' l'

I I _.- --.. -... ~ IJ {r[_.==.=: ~ . JI,,.~__-"~_'~.-",., • \.' J

Sid'wllik

(Figure 0 ) 100' R-O-W - 4 Moving Lones-First Stagf! (Figure 07) 100' R-O-W -6 Moving Lanes-Second Sloge

I 1--" I

12.0:-~.:.~.:.W .120' R-O-W . ---- ._-. .-- .--.. i~---,~~--- ·..-5~_:~·--·-----··-t--a:-.j. ~O~J.-2:I.. ~ I -------m~••=';".T II __ __ ._. _ __._ Sid. walk[ =~ :...'----

t··-_· ..-1 10

' rc..=-::::c::=-

----1.---~~' 'r-~~ .:H' --. ... 110

' . r 2~

s:•..,.~~::=!J ... .__ q'~~:--;:"-=~'.;,~J-T..Sld'wallc

(Figure [I) 120' R-O-W - 4 Moving Lanes-First StagH I (Figure (7) t 20' R-O-W - 6 Moving Lanes-Second Slage

J. I·· . . .. I

_______~5_0_'_R_-O-W__• --'- •. -,---1I 120' R-O-W_ - ,~

-jl0" U 0 H' ~ lOJ j.,_?:I ~ d-lLr[L - ~---== -==-=:r .... \..' J

Sid. walk

(Figure (3) 120' R-O-W - B Moving Lanes-Third" Stage

•

.r-·---'1Io",- ...2\'-i 66' .~t-- 2.5'_ ~,110',~. .i:

_:='l 1'. A _JiJ__~. .. -_. -. -=:~ '~~JSld...11l

I,..~_ .. ~- r \ t c:.n' n n HI '" lJ_ul __ I _...".e I I\. "; '-" ~ , / ,-- .. ~ ... ,., ~.,. '''' ----- I J I

, .. _ . ,50' R-O-W

r-

- " .5 ' 27'

4' J"1ftI' -

---1.....

11.5' ~

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I I' - I

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NOTES:

1. CULVERTS OVER 35' IN LENGTH REQUIllfi:PERMIT SECTION APPROVAL

2. FOR CULVERTS 0 YER 35' IN LENGTH,TYPE ..D" INLETS TO BE INSTAUEDON CULVERTS AT A SPACING OF 33'CENTER TO CENTER.

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CURB CUT-BACK FOR PARAU.rt PARKING ONtY MAY BJ' AUT7l0RIUD AT LOCAnfJNS JflCDJ' smon PA1UaNc IS 'TcJ1l1B1TJ:D ALONG T7IKNORJlAL CURB OR IN LOCAfJONS Jr7lER8 na NARRO" J1Dm OF ROADrAY OR onC8R PHmCAL IJ,VTTAfJON 1110111 'NDfCAn mAT FORfRAI11C SAJTTY PARKINC CAN BJ' BETTER ACOJIJIODATrD IN CUT BAClt

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THE WORD "STOP" SHALL NOT BE USED ON THE PAV~:MENT UNLJ':fiSACCOMPANIED BY A STOP UNE (SEC. 38-14) AND STOP SIGN (S[':C. 28-4).THE WORD "STOP" SHALL NOT BE PLACED ON THE PAVEMENT INADVANCE OF A STOP UNE, UNLESS EVERY VEHICLE IS REqUIRED 1'0STOP AT ALL ·TIMES. PAVEMENT MESSAGES SHOULD Gl':NERALLY U1':NO MORE THAN ONE LANE IN WIDTH EXCEPT THE "SCIIOOL" MESfl/\GE(SEC. 7C-6).

• MINIMUM SIZES FOR NORMAL INSTALLATION; LARGER SIZES MAY liE NEEDEJ'FOR FREEWAYS, ABOvE: AVERAGE SPEEDS, AND OTHEH CRITICAL CONDITIONS fOR

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