Right of Way Specifications Town of Telluride.pdf

Telluride Public Works Department · Town of Telluride · P.O. Box 397 · Telluride · Colorado 81435 · 970-728-8415 · www.telluride-co.gov

DESIGN STANDARDS AND CONSTRUCTION SPECIFICATIONS

For Construction in the Right-of-way & Connections to Public Utilities

(AKA “ROW Specifications”)

PUBLIC WORKS DEPARTMENT

TOWN OF TELLURIDE, COLORADO

Original 1984 Update Adopted November 2011

Prepared by Telluride Public Works Department & Buckhorn Geotech, Montrose, Colorado

C:\Documents and Settings\dgesmundo.CITYOFTELLURIDE\My Documents\Website\ROW Specifications\Standards FNL.doc Adopted Fall 2011

TABLE OF CONTENTS

TABLE OF CONTENTS .................................................................................................................................................i PREFACE.....................................................................................................................................................................vi

RIGHT OF WAY & UTILITY DESIGN STANDARDS

Section 00 - GENERAL DESIGN CRITERIA

INTENT

DESIGN CALCULATIONS

PROJECT DRAWINGS

Plan Views Profile Views

FINAL CONSTRUCTION DRAWINGS

Section 01 - MINIMUM DESIGN STANDARDS FOR SANITARY SEWER SYSTEMS

DESIGN FLOW

HYDRAULIC DESIGN

DESIGN DETAILS

SERVICE CONNECTIONS

Section 02 - MINIMUM DESIGN STANDARDS FOR WATER DISTRIBUTION SYSTEM

GENERAL

PIPE SIZE AND SPACING

VALVE SPACING

FIRE HYDRANTS

WATER MAIN LOCATION

SERVICE CONNECTIONS

WATER METERS

BACKFLOW PREVENTION DEVICES

MATERIAL ADDITIONS

Section 03 - MINIMUM DESIGN STANDARDS FOR STREET CONSTRUCTION

GENERAL

GEOMETRICS

Grades Intersections Horizontal Curves Right-of-Way Pavement Widths

CURBS, GUTTERS, SIDEWALKS AND CROSS PANS

HANDICAP RAMPS

BUS STOPS

DRAINAGE

FLEXIBLE PAVEMENTS

METHODS OF ANALYSIS

SNOW REMOVAL AND STORAGE

STREET LIGHTING

STREET FURNITURE

LANDSCAPING & IRRIGATION

Soil Trees Shrubs

BOLLARDS

UTILITY BOXES

SURVEY MONUMENTS

Section 04 - MINIMUM DESIGN STANDARDS FOR STORMWATER MANAGEMENT SYSTEMS

METHODS OF ANALYSIS

FACILITY CAPACITY AND DESIGN

Section 05 – WALKWAYS FOR BUILDING ACCESS, DRIVEWAYS, & PEDESTRIAN TRAILS

WALKWAYS FOR BUILDING ACCESS

DRIVEWAYS

PEDESTRIAN TRAILS

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RIGHT OF WAY & UTILITY CONSTRUCTION SPECIFICATIONS

Section 01010 - SPECIAL PROVISIONS TO THE CONSTRUCTION SPECIFICATIONS

INTENT

REFERENCE STANDARDS

PERMITS AND APPROVALS

INSPECTION

QUALITY CONTROL

AS-BUILT DRAWINGS

WARRANTY AND ACCEPTANCE

PROJECT CLOSEOUT

Section 02210 - STREET EXCAVATION AND EMBANKMENT

PART I – GENERAL

WORK INCLUDED

JOB CONDITIONS

SEQUENCING

PART II – PRODUCTS

FILL MATERIALS

PART III - EXECUTION

PREPARATION

PREPARATION OF SURFACES

EXCAVATION

HAUL

COMPACTION

FINISH GRADING

FIELD QUALITY CONTROL

CLEAN-UP

Section 02220 - UTILITY TRENCHING, BACKFILLING AND COMPACTING

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

JOB CONDITIONS

CLASSIFICATION OF EXCAVATED MATERIALS

WARRANTY

PART II - PRODUCTS

PART III – EXECUTION

PREPARATION

EXCAVATING

PIPE EMBEDMENT

TRENCH BACKFILLING AND COMPACTING

COMPACTION AND BACKFILLING

SURFACE RESTORATION

SURFACE IMPROVEMENT REPAIR AND REPLACEMENT

Section 02520 - STORM DRAINAGE SYSTEMS

PART I – GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

PRODUCT DELIVERY, STORAGE AND HANDLING

PART II – PRODUCTS

PIPE MATERIALS

MANHOLE MATERIALS

STORM INLET MATERIALS

PART III - EXECUTION

PREPARATION

INSTALLATION

INSTALLATION OF MANHOLES, STORM DRAIN INLETS AND OTHER APPURTENANCES

FIELD QUALITY CONTROL

Section 02550 - WATER TRANSMISSION AND DISTRIBUTION LINES

PART I – GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

JOB CONDITIONS

PRODUCT DELIVERY, STORAGE: AND HANDLING

PART II – PRODUCTS

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PIPE AND PIPE FITTINGS

FIRE HYDRANTS

VALVES

VALVE BOXES

MANHOLE MATERIALS

SERVICE LINE MATERIALS

WATER SERVICE METERS

METER PIT MATERIALS

CONCRETE

PART III - EXECUTION

PREPARATION

INSTALLATION

INSTALLATION OF PIPELINE APPURTENANCES

FIELD QUALITY CONTROL

DISINFECTION OF POTABLE WATERLINES

Section 02560 - WASTEWATER COLLECTION AND TREATMENT SYSTEM

PART I – GENERAL

DESCRIPTION

QUALITY ASSURANCE

SUBMITTALS

JOB CONDITIONS

PRODUCT DELIVERY, STORAGE AND HANDLING

PART II - PRODUCTS

PIPE AND PIPE FITTINGS

MANHOLE MATERIALS

AIR RELIEF VALVE PIT MATERIALS

CONCRETE

PART III – EXECUTION

PREPARATION

INSTALLATION

INSTALLATION OF MANHOLES AND OTHER APPURTENANCES

FIELD QUALITY CONTROL - GRAVITY FLOW PIPELINES

FIELD QUALITY CONTROL - PRESSURE FLOW PIPELINES

Section 02600 - PAVING AND SURFACING

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

JOB CONDITIONS

PART II - PRODUCTS

BITUMINOUS MATERIALS

JOB-MIX CRITERIA

PART III - EXECUTION

SURFACE PREPARATION

FRAME ADJUSTMENTS

STORM DRAIN PROTECTION

PREPARING THE MIXTURE

EQUIPMENT

PLACING THE MIX

COMPACTING THE MIX

FIELD QUALITY CONTROL

CLEANING AND PROTECTION

Section 02605 - UNTREATED GRANULAR BASES

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

PRODUCT DELIVERY, STORAGE AND HANDLING

JOB CONDITIONS

PART II – PRODUCTS

MATERIALS

PART III - EXECUTION

PREPARATION

MIXING

PLACEMENT

COMPACTION

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FINISH GRADING

FIELD QUALITY CONTROL

CLEAN-UP AND PROTECTION

Section 02625 - CURBS, GUTTERS, WALKS, AND ACCESSIBILITY RAMPS

PART I – GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

JOB CONDITIONS

PART II - PRODUCTS

MATERIALS

PART III - EXECUTION

CAST-IN-PLACE CONCRETE CURBS, GUTTERS, WALKS, AND ACCESSIBILITY RAMPS

CAST-IN-PLACE CONCRETE FINISHING

FIELD QUALITY CONTROL

CLEANUP

Section 03300 - CAST-IN-PLACE CONCRETE

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

JOB CONDITIONS

PART II – PRODUCTS

CONCRETE MATERIALS

CONCRETE PRODUCTION

CONCRETE ACCESSORY MATERIALS

PART III - EXECUTION

FORMWORK

REINFORCING STEEL

INSPECTION

PREPARATION

EMBEDDED ITEMS

INSTALLATION

CURING AND PROTECTION

REPAIR OF SURFACE DEFECTS

CAULKING AND SEALANTS

FIELD QUALITY CONTROL

ACCEPTANCE OF STRUCTURE

Section 15062 - DUCTILE IRON PIPE

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

PRODUCT DELIVERY, STORAGE, AND HANDLING

PART II - PRODUCTS

DUCTILE IRON PIPE (DIP)

FITTINGS

JOINTS

PROTECTIVE COATINGS

PROTECTIVE LINING

MECHANICAL COUPLINGS

PART III – EXECUTION

INSPECTION

INSTALLATION

FIELD QUALITY CONTROL

Section 15064 - PLASTIC PIPE

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

PRODUCT DELIVERY, STORAGE AND HANDING

PART II – PRODUCTS

POLYVINYL CHLORIDE (PVC) PIPE

INSPECTION

INSTALLATION

FIELD QUALITY CONTROL

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Section 15071 - REINFORCED CONCRETE PIPE

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

PRODUCT DELIVERY, STORAGE AND HANDLING

PART II - PRODUCTS

PIPE AND FITTINGS

PART III – EXECUTION

INSTALLATION

Section 15078 - CORRUGATED METAL PIPE

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

PRODUCT DELIVERY, STORAGE AND HANDLING

PART II – PRODUCTS

PIPE AND FITTINGS

PART III – EXECUTION

INSPECTION

INSTALLATION

Section 21000 – RUSTIC ROADWAYS

PART I - GENERAL

WORK INCLUDED

QUALITY ASSURANCE

SUBMITTALS

Section 22000 – REVEGETATION

PREFACE

This document, Design Standards and Construction Specifications for Construction in the Right-of-way & Connections to Public Utilities, has been promulgated by the Town based on input from local developers and contractors, Town of Telluride staff, the Planning and Zoning Commission, the Historic and Architectural Commission, the Town Council and others. Numerous public meetings were held prior to its adoption. These standards have been developed to provide for the orderly construction of those aspects of development typically referred to as "public improvements”, e.g. water and sewer lines, curb and gutter, drainage, surfacing and paving, etc. It is also intended to provide for the orderly construction of those aspects of development that must occur in public right-of-ways. It is hoped that these standards will provide consistent quality construction of public improvements and connections to public systems throughout the community, and that they will serve as a useful tool for developers. This document should be used together with the Telluride’s Manual of Streetscape Standards (April 2007), where appropriate.

(Reference: Telluride Municipal Code (TMC) §15-12)

The Town of Telluride’s Design Standards and Construction Specifications for Construction in the Right-of-way & Connections to Public Utilities were adopted by ordinance to apply to all development and redevelopment that has a responsibility for public improvements, as well as a responsibility in connecting to public systems such as water, wastewater, stormwater, and roadways.

These standards and specifications are enforced in the same manner as the International Building Code;

that is, the code is enforced by designated enforcement officials. The right to inspect and issue stop orders has been delegated to these officials. The adopting ordinance provides for code flexibility by allowing alternate materials and means of construction under appropriate circumstances. Finally, a property owner may appeal a decision or interpretation of an enforcement official to the board of adjustment/appeals.

Please remember, these standards and specifications are law and enforceable through fines and penalties under the Telluride Land Use Code (TLC) §1-303.A.

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RIGHT OF WAY & UTILITY DESIGN STANDARDS

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Section 00 - GENERAL DESIGN CRITERIA

INTENT

The Town of Telluride, by its adoption of these Design Standards and Construction Specifications for Construction in the Right-of-way & Connections to Public Utilities, intends that the Design Standards be used by the Developer and his Engineer/Architect in the design of the project and encourages the Construction Specifications to be included in the Contract Documents executed by and between the Developer and Contractor. Whether they are so used is at the discretion of the Developer, however, the Town will not accept the improvements provided by the Developer unless and until they conform to the requirements of these Standards and Specifications.

The terms “Owner,” "Contractor” and” Developer” are herein referred to as “Applicant” for the purposes of this document. An Applicant is someone who proposes to construct a connection to public systems (e.g., water, wastewater, roadways) for private use, and/or to construct and dedicate for public use improvements or additions to the Town's systems, “Public Works Representative” shall mean the Public Works Director or his/her designee.

The Standards and Specifications contained in this Document are considered to be a baseline. If conflicts exist between this Document and other Local, State, or Federal requirements, the more stringent requirement shall apply.

DESIGN CALCULATIONS

The Developer shall submit, for review, final design calculations for his proposed project to show that the design meets the minimum requirements contained in these Standards and Specifications. Submittal of the design calculations shall coincide with the submittal of the Project Drawings. Design calculations shall include the Engineer’s Seal, as required by State Statute. Review of the Project Drawings will not commence until receipt of the design calculations. The design calculations shall be submitted with the Project Drawings along with the Engineers Seal, as required by State Statute.

The Town Council and Planning and Zoning Commission reserve the right to require additional design calculations, certificates, affidavits, endorsements, dedications or data, as may be required to enforce these Standards and Specifications.

PROJECT DRAWINGS

All project drawings of proposed improvements or additions, which are to be submitted for approval in accordance with the provisions of this Document, shall be submitted to the Town in at least one of the following formats. A representative of the Public Works Department will specify which format is most useful and appropriate on a case-by-case basis.

(a) On sheets having overall dimensions of 24 inches in height by 36 inches in width and drawn to the scales required herein-after.

(b) On sheets having overall dimensions of 11 inches in height by 17 inches in width and drawn to the scales required herein-after.

(c) In an electronic format that can be read by the Town’s computer system.

It is the intent of this requirement to standardize Public Works’ records and facilitate its operation and maintenance programs.

The project drawings shall contain a note thereon that all materials and construction methods employed shall be in accordance with the latest adopted Design Standards and Construction Specifications for Construction in the Right-of-way & Connections to Public Utilities of the Town of Telluride.

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The project drawings shall include thereon the following general items:

(a) Name of the Design Engineer.

(b) Name of the Project.

(c) Name and address of each Owner.

(d) Date.

(e) Engineer and/or Surveyor Certificate and signature.

(f) Scale(s) and North arrow(s). (Note: Scales to be written and graphic.)

(g) Deed or plat references for the project land and adjoining lands.

(h) Existing zoning classifications.

(i) Revision dates, if applicable.

(j) A location plan showing the general location of the project with respect to the Town and major streets and highways. No particular scale is required.

Plan Views In the event that a project cannot be shown in plan view on a 24" x 36" sheet at a scale of 1" = 40', then an index map at a smaller scale (i.e.. 1" = 400') shall be provided showing the entire project on a 24" x 36" sheet. On small projects a 1" = 20' or a 1" = 10' scale is acceptable.

The index map shall reference the drawing number that shows the applicable portion of the project on a 24" x 36" sheet at a scale of 1" = 40' or 1" = 20', whichever is applicable.

In addition to the general items required, all plan views shall be drawn to a scale of 1" = 40' or 1" = 20', whichever is applicable.

Other scales may be approved in writing by a Public Works Representative

Profile Views All profile views shall be drawn to a scale of 1" = 40' horizontal and 1" = 5' vertical on 24" x 36" sheets.

All elevations shall be based on the United States Geological Survey Datum. A 1" = 20' horizontal scale may be used for small projects.

FINAL CONSTRUCTION DRAWINGS

Construction “Drawings” or “Plans” for all proposed improvements shall be required. Concurrent with Construction Drawings submittal, evidence shall be provided to show that all applicable Local, State, and Federal permits have been obtained.

Final Construction Drawings shall include the following:

(a) A composite development plan on a single plan sheet showing the following:

(1) Soil boring logs and groundwater elevations throughout the development.

(2) Locations of soil boring test holes.

(3) Overlot drainage pattern and lot corner elevations for each lot.

(4) A finished first floor elevation for each lot that facilitates proper site drainage and access to sanitary sewer service.

(5) Sanitary sewer tap elevation for each lot.

(6) Those lots that will be restricted in basement construction due to groundwater, drainage or soils conditions.

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(7) The plan view layout of all lot lines, containing the number of square feet for each lot, water, sanitary sewer, curb lines and storm water management systems, and demonstrating the street drainage pattern.

(8) Typical section view of basement and crawl space construction showing relative elevations of curb, sanitary sewer, sewer service line, footer clearance, tap, and front of lot drainage.

(9) Any ditches, existing utility lines, drainages, required retaining walls, or other factors that will influence the development.

(b) Water system plans shall be in compliance with Colorado Department of Public Health and

Environment (CDPHE) standards, Town of Telluride Cross-Connection Control Plan and the International Fire Code, latest adopted revision.

Minimum information shown on the plans shall include: stationing of all service taps, valves, fittings, fire hydrant assemblies, line junctions, property lines or lot lines and other system appurten-ances with respect to all property lines, easement lines, street curb or edge of surfacing, and other planned or existing utilities and structures. Calculations of available pressure head shall be provided for the highest point in the system to demonstrate adequate available pressure (60 psi. recommended, 40 psi minimum).

When special permits are necessary to extend or expand the domestic water system, the permit will be obtained by and in the name of the Town. Until all permits have been obtained, no construction shall begin, nor will final construction drawings be approved, nor will a final plat be signed by Town Council

(c) Sewer system plans shall be in compliance with CDPHE standards.

Minimum information shown on the plan view shall be stationing and location of all manholes and service taps, lot lines, easement lines, existing or planned utilities and structures. The plan view shall also show right-of-way and easement widths, the location of the line with respect to curb or edge of pavement and right-of-way lines as well as the angular deflection at all changes of direction of the line. Profile view shall show all manhole flow line elevations; rim elevations and stationing; the length, slope and pipe size and pipe material between manholes, as well as finished and existing ground lines. Calculations of pipe capacity and velocities shall be provided for the service area.

At least one (1) reference bench mark shall be provided for each 800 feet of sewer line. The elevation location and description of each bench mark shall be shown on the plans.

For wastewater extensions to Town systems, all permits shall be in the name of the Town. Public Works may assist in applying for wastewater permits, but the responsibility for obtaining such permits rests with the Developer.

(d) Stormwater management plans shall show all elements of the stormwater management system for each lot and how the overall system works with finished street elevations. Calculations of pre-construction and post-construction runoff rates and volumes will be required to demonstrate that changes in the rate and volume of runoff due to development have been entirely mitigated on site.

The Town will consider alternative approaches to managing runoff on a case-by-case basis, but only after the Applicant clearly demonstrates that s/he has minimized runoff to the greatest extent possible.

All stormwater management systems shall provide plan and profile drawings that show, according to the design, manhole and curb inlet locations, flow line elevations, all pipe sizes, types, lengths, and slopes and the finished street elevation at the outlet, in addition to the other requirements of (c) above. Infiltration galleries shall specify surface topography, infiltration media type, dimensions, and overflow path.

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(d) Street plan and profile drawings showing the green space, drainage swale, and/or curb profile for each side of the street. Street names and lot line locations shall be shown on all plan views. If sidewalks are proposed, plan view shall show sidewalk location, width, degree of cross-slope, and degree of longitudinal slope. Final Construction Drawing submittals on existing Town streets that are part of Telluride’s Manual of Streetscape Standards should conform in all aspects to the street plan and profile elements that have been approved and adopted.

• One typical section view of the planned street shall also be shown, and shall include locations of all utilities in relation to each other.

• Street travel way and parking width and treatment type shall be clearly shown.

• Each curb profile shall give stationing, top of curb elevations; vertical curve beginning, mid and end points, stationing and elevations, slope and existing ground line profile. Plan and profile views shall show curb return, curve P.C. and P.T. stations and elevations. Plan view shall show back of curb to back of curb width. Horizontal curve data at curb line shall show on the plans.

One typical section view of the planned street shall also be shown, and shall include locations of all utilities in relation to each other. Bench mark references shall be provided as described on (c) above.

• Each drainage swale profile shall give stationing, bottom of swale and top of swale elevations;

vertical curve beginning, mid and end points, stationing and elevations, slope and existing ground line profile. Horizontal curve data at curb line shall show on the plans. Bench mark references shall be provided as described on (c) above.

• All street designs shall meet applicable ADA (Americans with Disability Act) requirements when possible. If ADA requirements cannot be met due to site constraints, the Engineer must clearly document as a note on the designs the reason(s) why.

A copy of the filing plat should be included with the construction drawings for reference.

All of the above drawings shall be signed and stamped by a Professional Engineer, in good standing, licensed to practice in the State of Colorado.

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Section 01 - MINIMUM DESIGN STANDARDS FOR SANITARY

SEWER SYSTEMS

Reference: Telluride Municipal Code Chapter 13 Municipal Utilities

DESIGN FLOW

The design shall include the sizing and installation of trunk sewers for providing service to the entire area tributary to the outfall point. Estimates of residential sewage contribution shall be based on 75 gallons per capita per day with a peak hour factor of 4.0 for lateral sewer design and 2.5 for trunk sewer design.

Population density shall be based upon 3.5 persons per dwelling unit. Dwelling unit density shall be based upon actual density planned for the development. Alternate per capita flow contributions and population densities may be considered provided that supportive engineering data is presented to substantiate the figures used. Institutional, commercial, and industrial sewage contribution estimates shall be reviewed with the Public Works Representative.

HYDRAULIC DESIGN

Sewers 10 inches in diameter and smaller shall carry the peak hour design flow at a maximum flow depth of 80% of the pipe diameter calculated using a Manning ‘n’ value of 0.013. Trunk sewers 12 inches in diameter and larger shall be designed to flow half full at the peak hour design flow rate. The minimum velocity at the peak hour design flow rate shall be 2.0 feet per second. Where actual flow will be much below normal for several years, the minimum velocity shall be achieved by suitable grades at the partial design flow rate. Care shall be taken to design invert elevations at manholes in such a manner that the energy gradient is consistently falling in the direction of flow. Maximum allowable velocity shall not exceed 10 feet per second unless special provisions are made to protect against displacement by erosion and shock.

DESIGN DETAILS

Sanitary sewer mains shall be 8 inches in diameter or larger. Service connections shall be 4 inches in diameter or larger. The design of all sewer lines shall comply in every way with CDPHE regulations.

Tracer lines are recommended but not required. The following minimum grades shall apply. Pipe design shall be checked to ensure the minimum velocity is achieved for the peak hour design flow at the design grade. If actual flow will be much below peak hour design for several years; then a flow rate of 2.0 feet per second shall be achieved by suitable grades at the partial design flow rate.

TABLE 01-1. Maximum and Minimum Grades and Minimum Length of Vertical Curves for all Street Designs.

Sewer Diameter Minimum Grade (Percent)

4 inches 2.0 or ¼ inch per foot 6 inches 0.64 8 inches 0.40 10 inches 0.29 12 inches 0.23 15 inches or larger Min. velocity of 2 ft/sec

Manholes shall be provided at every change in direction, grade, size, dead-ends and at all intersections with other sewer mains; maximum spacing shall be 400 feet for lines 15 inches or smaller, or 500 feet for lines 18 inches and larger. Maximum change of direction in manholes for lines 18 inches and larger shall be 45 degrees. Sewer lines shall be straight and not curved between manholes, both in line and grade.

Drop manholes will not be allowed, except by approval of the Public Works Representative.

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In general, sewer mains shall have a minimum of 8 feet of cover between top of pipe and finished ground surface. Where this will provide less than 9 feet of elevation difference between the finished lot grade at building line and the top of the sewer main, it shall be indicated on the plans that the lot is served by a "shallow sewer" and appropriate elevation information shall be given. Where shallower sewers are approved, a minimum cover of 5 feet is required unless special procedures for insulation are approved by the Public Works Representative.

Sewer mains shall be extended to a point at least 15 feet uphill from the lowest lot corner adjacent to the sewer main of the uppermost lot to be served and terminate in a manhole. Four-inch diameter service connections shall not be made at manholes, but shall be provided between manholes as required unless approved by the Town Representative. Manholes shall be stubbed out with suitable size pipe and plugged and marked (record location to be filed with the Public Works Department) wherever future lateral extension of the sewer is anticipated.

Locate sanitary sewer mains in the street centerline. Mains in easements or alleys shall ordinarily be located in the center of the easement or alley. When sanitary sewer mains are placed along back lot lines, they shall be located in a manner that provides access for maintenance crews.

SERVICE CONNECTIONS

Minimum pipe size for services shall be 4 inches in diameter. Full body wyes shall be provided on the sewer main for service connections at each lot or building site and the service line extended to the lot line, and shall be shown on the plans. Service lines shall ordinarily be located at a minimum depth of 5 feet below the centerline of the lot and the designer shall demonstrate that gravity service can be achieved to the low point on the lot. Fittings shall be angled upwards so that the upper invert of a 1/8th bend connected to the fitting will have an elevation equal to or higher than the inside crown of the sewer main.

Manholes shall be used for service connections 6 inches in diameter and larger.

Each separate structure must have an individual sewer tap and service line unless a shared line is approved by the Public Works Representative in writing.

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Section 02 - MINIMUM DESIGN STANDARDS FOR WATER

DISTRIBUTION SYSTEM

Reference: Telluride Municipal Code Chapter 13 Municipal Utilities

GENERAL

The design of the water distribution system shall be based on the requirements of the Colorado Department of Public Health and Environment (CDPHE) and the Town of Telluride.

The Town reserves the right to require the Applicant to submit, for review, all calculations for flow and pressure requirements for the proposed system. The system shall comply with CDPHE standards, the International Fire Code, latest revision, and Town of Telluride specifications.

PIPE SIZE AND SPACING

The design shall include the sizing and installation of water transmission lines required to provide service to potential future development outside the limits of the planned project.

Distribution mains shall be a minimum of 6-inch pipe where the length of the main between branches is less than 800 feet; otherwise a minimum of 8-inch pipe shall be used. All piping shall be looped wherever possible. Where approved by the Public Works Representative, however, dead ends may be provided on cul-de-sacs less than 300 feet long with a permanent blow-off or fire hydrant at the dead-end.

Dead-ends on any line that will be tapped for service shall be provided with a temporary blow-off or fire hydrant before being extended. Dead-ends on lines that will not be extended shall be provided with permanent blow-offs or fire hydrants. All properties to be served water shall have a main adjacent to the property.

In general, water mains shall have a minimum of 7 feet of cover between top of pipe and finished ground surface.

VALVE SPACING

Gate valves on all mains shall be placed so that the no more than 800 feet of line will be out of service at one time. Valves shall also be placed at each fire hydrant and permanent blow-off. Typically, every tee at an intersection will have valves at each branch to allow for the least number of homes being out of service at one time.

FIRE HYDRANTS

Fire hydrants shall be placed no more than 300 feet apart, as measured within the right-of-way, so that each hydrant is easily accessible to fire fighting equipment. In general, locate fire hydrants on street corners. The minimum allowable pipe sizes delivering water to fire hydrants shall be a 6-inch diameter line on a looped network, or an 8-inch diameter line on a dead-end system. Design calculations shall be submitted to demonstrate flow and residual pressure at each fire hydrant during a maximum day demand meets Fire Department requirements.

WATER MAIN LOCATION

Locate water mains in the east or north side of streets, no more than 3 feet or less than 2 feet west or south, respectively, from the edge of asphalt.

In all instances, the water mains shall extend to the extremities of the property or subdivision served or to the extremities of the street or road improvements, whichever is greater. A main serving one lot shall C:\Documents and Settings\dgesmundo.CITYOFTELLURIDE\My Documents\Website\ROW Specifications\Standards FNL.doc Adopted Fall 2011 extend all the way across the frontage for that lot. Mains serving a subdivision shall extend to the center of boundary streets or to boundary lines.

SERVICE CONNECTIONS

Each separate structure must have its own water tap and service line. Separately-owned units within a building must have individual shut offs and meters.

Water service lines shall be located 5 feet off of lot center-line, on the high side of the lot, with a minimum of 10 feet of separation (outside of pipe to outside of pipe) on the horizontal plane from the sanitary sewer service line. Tracer lines are recommended but not required.

Service stub-ins for residential installations shall terminate with a curb stop at the property line. The curb stop shall not be located in a sidewalk, driveway or parking area without prior approval by the Public Works Representative. Meter and yoke shall be located inside buildings with the remote reader on an outside wall designated by the Public Works Representative.

WATER METERS

A separate (SENSUS SRII or Metron-Farnier) water meter is required for each unit in a development.

Meters shall be the type and model designated by the Public Works Representative and installed in compliance with the International Plumbing Code adopted by the Town (TMC§15-5). Meters shall have data transmitter devices (MXU’s) which are compatible with the Invensys Radio Read System (IRRS) and may be purchased from the Town to ensure uniformity of installation and design. A meter’s data transmitter device (MXU) shall be located on the exterior of the premises to allow unfettered and safe access for remote reading, removal, inspection, repair, maintenance and replacement. Meters shall be inspected and approved for operation by the Public Works Representative upon installation. Water meter specifications are provided in Section 02550 of this document. (Reference: TMC§13-1-120 and

TMC§13-1-130.)

BACKFLOW PREVENTION DEVICES

An approved backflow prevention device(s) shall be installed in all buildings, structures or premises in which plumbing is installed. The backflow prevention device must be certified by the University of Southern California, Foundation for Cross-Connection Control and Hydraulic Research (USC FCCCHR) or the American Society of Sanitary Engineers (ASSE). The owner of the premises shall notify the Public Works Representative of all backflow prevention devices that are installed on the premises. The backflow prevention device shall be installed immediately inside the premises being serviced before the first branch line leading off the service line. Backflow prevention devices shall be of a model and size approved by the Public Works Representative. Backflow prevention devices shall be inspected and tested immediately upon installation and annually thereafter by a certified inspector and/or tester. The owner shall inform the Town in writing within 10 days of the results of the inspection and test. Backflow prevention device specifications are provided in Colorado Cross-Connection and Control Manual, 5th edition and in Section 02550 of this document. (Reference: TMC§13-3-110 and TMC§13-4.)

MATERIAL ADDITIONS

The Town reserves the right to require the addition of valves/hydrants, and other appurtenances by the Developer or Owner up until the time of trench backfill placement for the water construction project.

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Section 03 - MINIMUM DESIGN STANDARDS FOR STREET

CONSTRUCTION

References: Telluride Municipal Code Chapter 11 Streets, Sidewalks, and Public Places, Telluride Land Use Code Chapter 13 Division 3 Street and Utility Design Requirements

GENERAL

All curb, gutter, sidewalk, rights-of-way widths and street widths shall conform to the requirements of the Standard Drawings at the end of this section for new development or development in rights-of-way that are not specified in the Manual of Streetscape Standards. Care shall be taken to ensure continuity of grades, widths, etc., of proposed, existing and future installations.

GEOMETRICS

Grades The following shall be the maximum and minimum grades and minimum length of vertical curves for all street designs. See Table 03-1 below. The Public Works Representative may permit deviations from these requirements when, in his or her judgment, terrain conditions are such that minimum or maximum grades as set forth are not feasible. Preferred minimum grade is 1 percent. Absolute minimum grade permitted shall be 0.6 percent and shall be carried in continuous intervals of not less than 100 feet along the curb line. Percentage of grade along the centerline through intersections shall not exceed 4 percent.

Centerline street profiles shall be extended for future construction, beyond the limits of the project being designed, for a distance of 1000 feet or to connect to an existing improved street, whichever is less.

TABLE 03-1. Maximum and Minimum Grades and Minimum Length of Vertical Curves for all Street Designs.

Maximum grade

(percent) Minimum grade

(percent) Minimum vertical curve length*

(whichever is greater)

Normal Hillside

Arterial street 5.0 7.0 0.4 100 ft or 100 ft/percent algebraic difference in grade change

Collector street 6.0 8.0 0.4 100 ft or 50 ft/percent algebraic difference in grade change

Residential, cul-de-sac and marginal access streets

10.0 12 0.4 60 ft or 50 ft/percent algebraic difference in grade change

* Where algebraic change in grades is less than one-half of one percent, vertical curves may be omitted.

Intersections Intersections shall approximate right angles as closely as possible. Not more than 2 streets shall intersect at any one point.

Proposed new intersections along one side of an existing street shall coincide with an existing intersection on the opposite side of the street. Two streets meeting a third street from opposite sides shall meet at the same point or their centerlines shall be offset a minimum of 150 feet.

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Cul-de-sacs shall not exceed 400 feet in length and surface drainage shall be either toward the intersecting street or toward an engineered detention, retention, or infiltration system. If neither of these alternatives is feasible, a drainage easement shall be provided through abutting lots to an approved drainage system.

No on-street parking or driveways shall be allowed within 20 feet of the beginning of the curb radii at the approach to any intersection. For 25-foot wide lots being developed as a single unit, a driveway may be permitted adjacent to property line farthest from intersection.

Horizontal Curves The following shall be minimum horizontal curve radii for all street designs. See Table 03-2 below. The Public Works Representative may permit deviation from these requirements when, in his or her judgment, conditions warrant such deviation.

TABLE 03-2. Minimum Horizontal Curve Radii for all Street Designs.

Minimum Radius Curve Type Residential Collector Arterial

Street centerline 150 275 400 Curb return 15 25 30 Drainage swale 10 20 25

Minimum cul-de-sac radius shall be 45 feet to the inside edge of curb and gutter and a right-of-way radius of at least 60 feet, unless special provisions for snow storage are provided. Curb returns for areas currently developed in Town may conform to historic standards.

Right-of-Way Street right-of-way must be sufficient to accommodate vehicular traffic; pedestrians; all public utilities;

on-street parking where provided; and in some cases bicycles, special storm drainage facilities, snow storage, or other special treatments such as medians, traffic channelization, or traffic calming devices.

In accordance with the street standards for all public ways hereafter dedicated and accepted, the minimum right-of-way widths for streets, alleys or pedestrian ways included in any subdivision shall not be less than the minimum dimensions for each classification, as shown in Table 03-3, or as otherwise specified in the Land Use Code, or as approved by the Planning and Zoning Commission through the Subdivision or Planned Unit Development process.

TABLE 03-3. Minimum Right-of-Way Widths for all New Street Designs.

Type Local Example of Type (NOTE:

Actual ROW widths may not comply with preferred standard)

Design Speed (mph)

Capacity Average Daily Traffic

(ADT)

Minimum R.O.W.

Width

Standard

Major arterial (limited access)

Highway 145 Spur 35 8000 and up

≥100 feet

Minor arterial W. Colorado Ave. 25 3500 - 8000 80 – 100 feet

Collector E. Colorado Ave. 25 1500 - 3500 60 feet

Local Pine Street 15 up to 1500 50 feet

Marginal access Gregory Ave. 15 up to1000 40 feet

Cul-de-sac Sunset Ridge Drive 15 up to 1000 65 foot radius

Alley 10 15 feet

C:\Documents and Settings\dgesmundo.CITYOFTELLURIDE\My Documents\Website\ROW Specifications\Standards FNL.doc Adopted Fall 2011

Type Local Example of Type (NOTE:

Actual ROW widths may not comply with preferred standard)

Design Speed (mph)

Capacity Minimum R.O.W. Average Daily Traffic Width (ADT)

Standard

Bicycle way 15 feet

Pedestrian way ≥ 8 feet (per below)

A drainage easement, in addition to the provided street right-of-way width, may be required where streets parallel a stream or drainage area. The Public Works Representative shall determine the width of such a drainage easement

Pavement Widths Street pavement widths shall be in accordance with Table 03-4. Alleys shall be dealt with on a case-by-case basis. Not all alleys shall be paved. Historic character shall be a consideration when determining pavement widths. Street turn lanes provided at intersections and acceleration/deceleration lanes shall be 11 feet wide. Travel lanes shall vary with street type from 8 feet wide to 12 feet wide. Bicycle ways shall have a minimum pavement width of 8 feet. Where bicycles and pedestrian paths are combined, the minimum width is 10 feet. Variations to these requirements can only be provided by the Town Manager, as defined in the Telluride Land Use Code §1-201.G, in writing, or as otherwise specified in the Land Use Code, or as approved by the Planning and Zoning Commission through the Subdivision or Planned Unit Development process.

The dimensions of lane width, parking width, turn lane width, curb and gutter width and island width shall be followed in all cases. Variations in paving widths are given to provide flexibility, reduce costs and reduce impervious area. However, consistency within a continuous right-of-way is required. The widest paving width will be required where the following conditions exist:

a. The accumulation of traffic as the street progresses through the development increases and the street is continuous without 90 degree turns.

b. The street is anticipated to serve adjacent properties in which case it shall be sized to serve the density of future build out deve1opment.

c. The street is required to be of a certain class to fit the overall transportation plan.

Any proposed variations from the standards shown must be approved by the Town. In general, a flexible pavement shall be used; however, under certain conditions concrete roadways will be considered.

TABLE 03-4. Minimum Pavement Widths (exclusive of curb and gutter)

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Low Density Medium Density High Density

Street Classification Parking Allowed?*

Level <8%

Hill ≥8%

Level <8%

Hill ≥8%

Level <8%

Major arterial No -- -- 32 feet 32 feet 32 feet

Minor arterial Yes -- -- 42 feet 42 feet 42 feet

Minor arterial No -- -- 30 feet 30 feet 30 feet

Collector Yes 38 feet 40 feet 40 feet 40 feet 40 feet

Collector No 20 feet 24 feet 22 feet 22 feet 22 feet

Marginal access No 20 feet 24 feet 20 feet 20 feet 20 feet

Local Yes 18 feet 32 feet 38 feet 38 feet 38 feet

Local No 18 feet 18 feet 20 feet 20 feet 20 feet

* Assumptions: Parking = 9-foot wide paved parking space on both sides of the street. Two-way travel

CURBS, GUTTERS, SIDEWALKS AND CROSS PANS

All curbs, gutters, sidewalks and cross pans shall conform to the Construction Standards at the end of Section 02625 - Curbs, Gutters, and Sidewalks and/or Telluride’s Manual of Streetscapes Standards (April 2007).

Standard combination vertical curb, gutter, and sidewalk may be installed on local residential streets with approval by the Public Works Representative. Vertical curb and gutter shall be installed on collector and arterial streets.

In areas of the Town where vertical style curb and gutter is already in use, the same style of curb and gutter and sidewalk shall be constructed.

Where sidewalks or related concrete flatwork exceeds five (5) feet in width, the historic scoring pattern shall be constructed in the concrete. The developer may submit alternative or additional proposed decorative patterns and finish requirements for written approval to the Town Manager or the Planning and Zoning Commission through the Subdivision or Planned Unit Development process. Note, however, that the Streetscape Task Force agreed that decorative patterns and finish requirements in right of way sidewalks should be discouraged to provide a more uniform and cohesive pedestrian experience along all Town sidewalks. Replacement of existing sidewalks shall conform to the neighborhood's historic patterns.

HANDICAP RAMPS

Handicap ramps that comply with applicable requirements of the Americans with Disability Act (ADA) shall be provided at all curb returns and crosswalks. Truncated domes shall be of granite in a color that contrasts with the surrounding concrete. Truncated domes shall be sunk into concrete. Construction Specifications are provided at the end of Section 02625 - Curbs, Gutters, and Sidewalk. It is recognized that innovative solutions to meeting ADA requirements may be necessary under specific circumstances in this mountain environment. If no handicap ramp is possible at a specific pedestrian crossing, the applicant must provide a written explanation of why it is not possible and where the nearest accessibility crossing is located. The Town Manager may accept an alternative equivalent product to granite truncated domes.

BUS STOPS

Bus stops shall be provided as determined by the Town Manager. The goal is to ensure basic bus stop functionality, wherever a stop is to be located. Design of bus stops shall provide continuity and a level of performance similar to Town's existing facilities.

DRAINAGE

To the greatest extent possible, all streets shall be designed to minimize the volume of runoff generated and to minimize the concentration of runoff volumes by incorporating detention and/or infiltration within the right-of-way shoulder or in parks in the right of way. Street pavement and gutter grades shall permit flow without ponding. Drainage swales and infiltration galleries may pond water for no more than 5 days. Five-foot wide concrete drainage cross pans shall typically be installed across those streets at

C:\Documents and Settings\dgesmundo.CITYOFTELLURIDE\My Documents\Website\ROW Specifications\Standards FNL.doc Adopted Fall 2011 intersections where traffic must stop. Installation of pans between intersections or across streets carrying through traffic at intersections shall be avoided unless authorized by the Public Works Representative.

A check shall be made to ensure continuity of drainage design between the proposed construction and existing or future construction. In no case shall surface drainage be disposed of by overland dumping.

FLEXIBLE PAVEMENTS

Flexible pavement shall consist of full depth asphaltic concrete or a combination of asphaltic concrete and untreated granular base course. Alternate sections may be considered provided that supportive engineering data are presented to substantiate the design used.

Pavement thickness shall be determined for subgrade strength values determined by one of the following standardized tests:

1. California Bearing Ratio (CBR)

2. Resistance (R) Value

3. Bearing Value Determination (Plate Bearing Test)

The subgrade soil evaluation shall use recognized soils testing laboratories under the direction of a Professional Engineer. Sufficient tests shall be made to evaluate fully each different soil type within the road alignment. Samples for determining these strength values shall be taken between gutter lip lines of proposed streets at a minimum of 300-foot intervals for all new streets. Where the length of the proposed new street is less than 300 feet, a minimum of 2 samples shall be taken. After the strength values are determined from these samples, the design subgrade strength value shall be the subgrade strength value that 90% of all test values in the section are equal to or greater than. When appreciable changes in the design strength values occur for different streets throughout a subdivision, thicknesses may vary but thicknesses shall remain constant throughout each street.

METHODS OF ANALYSIS

The determination of pavement section thickness shall be made by either the procedures presented in the Asphalt Institute Manual Series No. 1 (MS-1), latest edition, Thickness Design - Asphalt Pavements for Highway and Streets, or the Colorado Department of Highways Design Manual, latest edition, Section 600, Design of Pavement Structure - 600. Pavement and roadbase materials specification shall be per the Colorado Department of Transportation guidelines for the Telluride region.

SNOW REMOVAL AND STORAGE

Every proposed public improvement shall have sufficient area or an acceptable strategy to adequately handle snow storage and removal from all impervious areas that are to be dedicated to the Town for public purpose. “Sufficient” area shall be defined as no less than 25% of the parking, drives, and sidewalk areas. Snow storage and removal activities on private lots shall not encumber public rights-of-way, principal drainage channels, sidewalks, or other private properties. As well, snow storage shall not abut historic structures in a manner that can harm the structure. The snow storage and removal plan must be submitted to the Town Manager for review and approval in writing.

For new public right of ways, the Town will consider a variety of solutions for storing snow, including:

• adjusted uphill and downhill shoulder widths in the standard-size right-of-way; and

• storage areas on public ground.

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STREET LIGHTING

Section 5, Streetscape Lighting Plan, in the Manual of Streetscape Standards (April 2007), shall be followed for all street light installations in the right of way. Applicants should consult the Manual of Streetscape Standards to determine whether their project is subject to those standards. If the designs and guidelines in the Manual of Streetscape Standards differ from those in these Design Standards and Construction Specifications for Construction in the Right-of-way & Connections to Public Utilities , the Manual of Streetscape Standards shall prevail.

Street lighting may be required for all streets in or on the periphery of all new developments. Applicants are encouraged to use solar-power for street lighting.