OVERALL UTILITY PLANS 1. Provide a typical section depicting the roadway (proposed/future), utility locations, and separation for

Transcription

1 OVERALL UTILITY PLANS 1. Provide a typical section depicting the roadway (proposed/future), utility locations, and separation for all roadways. Identify utility locations/separations from gutter lip and edge of pipe within the typical sections provided in the construction plans. The typical sections (roadway w/ utility and storm sewer) are to be applied throughout the designs. Where these section may differ would be along horizontal roadway curves. Revise the utility alignments and storm sewer to correspond with the typical sections within the plans as the proposed design is inconstant throughout the proposed design. Typical sections for local roadways are to correspond with the below utility layouts: 10 minimum utility separations are to be maintained between all other utilities, including storm, unless otherwise approved by the City (as shown on the provided local section). With the exception of the layout provided for local streets, all other requests will require a variance request and the associated technical justification. No less than a separation of 2 from the gutter lip to manhole lid (storm) and to valve box (FH valves only) is to be maintained. Ensure this separation has been achieved and add a note to overall storm sewer and utility plan and profiles to clearly identify this requirement to the contractor. Manholes may need to be rotated to achieve this and it will need to be clear to the contractor. 2. Show proposed sleeving within the construction plans for all sleeves to be installed prior to paving operations. A sleeving plan is recommended. Sleeving is to be installed beneath paved areas and hardscape for irrigation, signal wiring/fo, etc.

2 Sleeving is to be extend a minimum of six (6) inches beyond edge of all paved surfaces. Boring for sleeves for sleeves shall be performed where there are existing obstructions that cannot be removed. Irrigation sleeving material shall be PVC Class 200 pipe with solvent welded joints. Diameter, pipe type, schedule/classification, and location (STA) shall be indicated on the drawings 3. Per Standards & Specs, to provide one page OU Plan. Given the size of the development, it is understandable that in order to show the necessary detail and provide legible labels it may be necessary to divide it into additional sheets to provide general utility information and plan clarity/legibility, but a single sheet OU plan is to be provided as well with the corresponding OU plan matchlines. The OU plans are not to include any alignment information as that is to be provided on the utility plan and profile sheets 4. All ROW, easements, tracts, and lots are to be shown, labeled and consistent with the plat under current review. All proposed utilities shall be located within an easement/tract or ROW. 5. Clearly label existing and proposed utilities (size, type, etc). Existing utilities to be relocated, remain, and lowered are to be clearly identified as well. For example: Provide size, type (& # for proposed MH's & inlets) for water, storm and sanitary. Revise the sanitary sewer labels to identify them as such, not just as 8 PVC, similar to the water mains. 6. Spacing of several lights exceeds the 200' (+/ 40') on locals and collectors, and 150 (+/ 50 ) on arterials. Light spacing on arterials and collectors is for each side, not alternating. Lights are to be provided at all intersections and at the end of all cul de sacs. Revise lighting is provided at intersections, even in interim locations where there will be future signal lighting, and to ensure minimum spacing requirements have been meet. 7. Overall utility plans are not to be used for utility layout/alignment design that would otherwise be provided on plan and profile sheets. (Example: Sheets UT09 and UT08.) 8. Show and label a maintenance access path(s) for the drainageway and for all utilities outside of roadways, including those under future roadways. 9. Identify how and where underdrains will outfall. What will be the end treatment for underdrain outfalls? Provide detail for outfall pipe end treatment. 10. Show/label irrigations services & meters on OU Plan and Utility Plan and Profiles. Provide specifics on plan and profiles for size, type, location, offset. 11. Evaluate lot frontage available for access and adjust inlet locations and FH locations as necessary. Several locations will appear to have limited and possibly insufficient frontage to locate the driveway sufficient separation from the lot line and outside of the flowline transition to inlet throat. Adjust the inlet locations accordingly. This may also impact the feasibility of the inlet to be a sump inlet and it may need to be revised to be an on grade inlet. Inlets and inlet transitions shall be located outside of driveways as they impede access and most often result damage to vehicles. UTILITY PLAN AND PROFILES 1. See aforementioned Overall Utility Plan comments.

3 2. All sanitary sewers to be extended in a future phase must terminate at a MH, not a plug. 3. Hydrants are to be provided at dead end mains. 4. The maximum distance between valves along a water main is 600'. 5. Show and label all utility crossings in the plan and profile views. Clearly demonstrate that all required clearances have been met for utility crossings in the profile views. In the profile view, provide top of pipe and bottom of pipe as well as actual clearance to clearly demonstrate that the specifications have been met. 6. Fire Hydrant branch mains 50 + will need to be modeled. Clarify the proposed FH lateral length vs watermain length (cul de sacs, other) and reducers on the plans (Provide modeling in report) 7. Show/label the proposed irrigation meters and their associated sizes on the plans. Include the associated details in the detail sheets. Irrigation construction plans are required and may be provided as a separate submittal. Plan: 8. Clarify what is proposed for the end treatments for the underdrain outfalls? Identify cleanout locations and outfall inverts as well. Provide a construction detail for the proposed end treatment at the pipe outfalls. 9. Include pipe type and classification (labeled or identified in general) on the utility plan and profile sheets for sleeving pipes, underdrains, water and sewer mains and services. 10. Provide service locations tables, labeling, and/or notes regarding the proposed service location, size, type, slope, etc. 11. Label pipe (size, type/materials, length), Fittings (size, type, and location), show kickblocks, Valves (size, type, location), Fire Hydrants (location), Irrigation tap (locations and meter sizes). 12. Provide proposed wye and riser connection for services Profile 13. Provide existing manhole inverts and rim elevations 14. Label pipe size, type, length (SS length between MHS), types of joints, proposed depth, slope (SS and underdrain outfalls), elevation (WL top), fittings, valves (size and type), fire hydrants, irrigation tap (locations and meter sizes with spot elevations). 15. Proposed manholes and cleanouts Stationing (CL in roadway, pipe STA & NE outside of roadway), number, Elevation of inverts in and out of manhole, elevation of manhole rim) 16. Proposed underdrain (Proposed concrete encasement & cutoff walls)

4 Final Utility Report 1. Cover letter presenting the final design for review and shall be prepared by or under the direction of an engineer licensed in Colorado. 2. Responsible Party certification sheet Report Contents The Report shall be in accordance with the following outline and contains the applicable information listed: General Location and Description a. Location i. Township, range, section, one-quarter (¼) section. Streets within and adjacent to the subdivision with ROW width shown. i Major facilities and easements within and adjacent to the site. iv. Names of surrounding developments. b. Description of Property i. Area in acres. Ground cover (trees, shrubs, vegetation, general soil conditions, topography, and slope). i Major drainage ways. iv. General project description. v. Proposed land use. 2. Basins and Pressure Zones a. Major Basin Description i. Reference to sewer master plan studies,reports for adjacent subdivisions, and the City Utility Masterplan. Major basin characteristics, and existing and planned land uses. 3. Design Criteria

5 a. Regulations: Discussion of the optional provisions selected or the deviation from the criteria, if any, and its justification. b. Development Criteria Reference and Constraints i. Discussion of previous utility studies (i.e., utility reports, project master plans, etc) for the site in question that influence or are influenced by the design. Discussion of the effects of adjacent utility studies. i Discussion of the impact of site constraints such as streets, other utilities, existing structures, and development or site plan. c. System Design Criteria i. Refer to Section 200 and 300 for water and sanitary sewer design criteria. Provide all supporting calculations and information. i Discussion and justification of other criteria or calculation methods used that are not presented in or referenced by the criteria. 5. Conclusions a. Compliance with Standards 6. References Reference criteria and technical information used. Two (2) copies of the Final Utility Report including the Final Utility Plan shall be submitted to the Development Engineering Manager for review.