§ 42-124. Form and content of construction plans and calculations.
(a)
Improvements. All improvements shall be designed in accordance with the specific design provisions detailed in this chapter.
(b)
Submission to city secretary. Two copies of complete plans, specifications, engineering calculations, and detailed cost estimates, for streets, drainage, sanitary sewers, water distribution, and any other improvements to be performed, are required for submission with the final filing plot. Before the final filing plat can be approved by the city council, and filed of record by the city, the information must be submitted to the city secretary and approved by the planning and zoning commission and city council.
(c)
Form. These plans shall be submitted on standard 22-inch or 24-inch by 36-inch sheets, and shall include the major information required herein.
(1)
The plans shall include plan view, profile and section views of the proposed improvements. Construction details of all structures including dimensions, reinforcing, and components such as grate and manhole covers shall be shown. The proposed curb and gutter type and location in relation to the centerline and right-of-way, the proposed sidewalk dimension and the proposed parkway grading shall be shown on street plans. This information shall be given for each of the different types of streets and alleys in the subdivision. Soils test by an approved soil testing laboratory shall be submitted with the plans to determine the limits and amount of lime or cement stabilization required.
(2)
The plans shall include the alignment of each street, alley, crosswalk and drainage and any other easement, and a beginning and end station of the point of intersection of each curve. The station and angle of each intersection with another street, alley, or drainage easement, the station and radius of each curb return, the location of all monuments and the length, width, thickness of base, subgrade and surface material of each street.
(3)
The plans shall also include the location, description and elevation of all benchmarks, the direction of storm drainage flow at each intersection, the flow line elevation of each drainage structure, the flow line elevation of each storm sewer at each point of change of grade and each end and the intervening gradient, the profiles of streets, alleys, and drainage structures shall show the natural ground at adjacent property lines and the proposed centerline.
(4)
The plans and profiles should be drawn at a scale of one inch to 40 horizontal and one inch to four feet vertical. North arrow and date of preparation must be shown on each sheet. All public work improvement plans shall bear the seal and signature of a professional engineer registered in the state.
(5)
Unless otherwise approved by the city, all specifications for construction shall conform to the Standard Specifications for Public Works Construction, North Central Texas, published by the North Central Texas Council of Governments as adopted and modified by the city. Construction details shall conform to those adopted by the city.
(6)
Cost projections shall be prepared using quantities shown on the construction plans and recent unit prices from bids on similar projects. Reasonable contingencies should be included to cover uncertainty in the projection'. Actual bids supported by bid and performance bonds may be used in lieu of projections of probable cost.
(7)
Upon approval of the construction plans, specifications and projections of probable cost by the city engineer; approval of the contract documents, bonds and financial assurance; acquisition of all necessary off-site easements, and upon receipt of the inspection fees, the city shall issue a permit for the construction of public works improvements.
(8)
Each plan shall show the seal and signature of the registered professional engineer who prepared the plan. The subdivider shall retain a registered civil engineer, licensed to practice in the state, for all design in new subdivisions or developments, including streets, storm drains, water and sanitary sewers.
(9)
Upon approval of the plans, the developer shall furnish two sets of final approved plans to the city secretary for the subdivider's agreement.
(d)
Paving plans. These plans shall be submitted with the final plat for major subdivisions and shall be prepared from the preliminary plat, showing topographical contours of applicable, and showing the following:
(1)
Type of street to be constructed (i.e., Portland cement).
(2)
Classification (i.e., arterial, collector, residential).
(3)
Additional easement or right-of-way requirements.
(4)
Design standards used.
(5)
Relationship of existing and planned streets, to topographical conditions, if applicable.
(6)
Planned grading contours, elevations, earth works, slopes, retaining walls, or other grading information required by the city engineer.
(7)
A plan and profile of each street with top of curb grades, existing and proposed ground line shown. Each sheet shall include north point, scale, date, and bench mark description to sea level datum. Scales, shall be one inch equals 40 or 50 feet horizontally and one inch equals four, five, or ten feet vertically. The typical cross-section of proposed streets showing the width of roadways and type of pavement and location and width of sidewalk shall be shown. Each plan shall show the seal and signature of the registered professional civil engineer who prepared the plans.
(8)
All other requirements of the current street standards shall be included in the plans.
(9)
The plans shall contain a certificate of approval for signature of the city secretary and city engineer.
(e)
Sanitary sewer and water plans. These plans shall be submitted with the final plat for major subdivisions and shall be prepared from the preliminary plat, but shall also include topographical contours and shall show the following:
a.
Existing sewers, water mains, gas mains, electric and telephone lines, culverts, or other underground structures or utilities within the tract and immediately adjacent thereto with pipe sizes, grades, and locations indicated.
b.
Indicate the direction and distance to, and size of the nearest water mains and sewers in the event they are not on or adjacent to the tract, showing invert elevation of sewers, if any.
c.
The size and location of all proposed sewer mains and proposed easements, if required, including manholes. Grades for each main between manholes and the depth at each manhole shall be shown. Sewer plans are required to determine location of easements.
d.
The size and location of all proposed water distribution mains including valves and fire hydrants.
e.
The size of water mains according to requirements of the city.
f.
A plan and profile of proposed sanitary sewers, with grades and pipe sizes indicated and showing locations of manholes, cleanouts, etc., and a plan of the proposed water distribution system showing pipe sizes and location of valves, fire hydrants, and fittings, etc., in conformance with the criteria as shown in the part of the ordinance listed as design provisions. Each plan shall show the seal and signature of the registered professional civil engineer who prepared the plans. Each sheet shall include north point, scale, date, and bench mark description to sea level datum.
g.
A plan and profile of the proposed water distribution system showing pipe sizes and location of valves, fire hydrants, and fittings and other facilities. A profile is required for all water lines ten inches in diameter and larger. Each sheet shall include north point, scale, date, and benchmark description to sea level datum.
(f)
Storm drainage plans. Upon approval of the preliminary drainage study, the developer shall submit detailed plans, specifications and cost projections prepared by a registered professional engineer registered in the state and experienced in municipal drainage work. Existing and proposed flow lines of all improvements shall be shown.
(1)
Unless otherwise specified herein, drainage requirements shall be based on the City of Fort Worth Storm Drainage Design Criteria. The hydraulic manual prepared and compiled by the state department of transportation bridge division, with current revisions, may be used in cases not covered by the City of Fort Worth Storm Drainage Criteria and Design Manual or these design requirements.
(2)
For a major subdivision, a preliminary drainage plan shall be submitted with the preliminary plat. For a minor plat or replat, these plans shall be submitted with the final plat. This sheet shall be prepared on a reproducible copy of the plat so that the same information shall be repeated together with the following:
a.
Topographical information including contour lines on a basis of ten-foot intervals. All elevations shall be on U.S. Geologic Survey datum or referenced to a city benchmark on the same datum. The datum used shall be specified on the drawing.
b.
Any proposed changes in topography shown by contour lines on a basis of five-foot vertical intervals.
c.
Areas contributing drainage to the proposed plat shall be shown on small scale supplemental drawings. The information to be submitted shall include the area, slope and type of development in the contributing area.
d.
The locations of drainage from the proposed plat including contributing areas shall be shown together with the quantity of drainage. All drainage must be planned in the best interests of the immediate and adjacent properties.
e.
Drainage arrows shall be shown for all streets and drainage easements. When the maximum permissible capacity of streets to carry stormwater is exceeded the location of storm sewers, curb inlets and open channels shall be shown.
f.
Supplemental information showing the preliminary design calculations for drainage shall be furnished on 8½ by 11-inch paper attached to the topography and drainage plan.
g.
The exact location, dimension, description, and flow lines of existing drainage structure structures, including road and driveway culverts, and the location, flow line and floodplain of existing watercourses within the subdivision or contiguous tracts.
h.
The width of drainage and other easements shall be shown.
i.
A plan and profile of proposed storm sewers or channels, showing hydraulic data, pipe grades and sizes, manholes, inlets, pipe connections, outlet structures, etc., in conformance with the criteria as shown in the part of the ordinance listed as design provisions. Each plan shall show the seal and signature of the registered professional civil engineer who prepared the plans. Each sheet shall include north point, scale, date, and bench mark description to sea level datum.
j.
A general location map of the subdivision showing the entire watershed (a USGS quadrangle is satisfactory).
k.
Scales shall be one inch equal to 40 or 50 feet horizontally and one inch equals four, five, or ten feet vertically.
l.
A plan of the development shall be submitted depicting the final grading contours and elevations, earthwork, slopes, retaining walls, minimum finished floor elevations of all structures, and any other information considered necessary by the city engineer at a scale of one inch equals 100 feet minimum.
(g)
Other utilities. The subdivider must furnish:
(1)
A written statement to the city designating that the subdivision will be served with gas or will be totally electric service. If a gas distribution system is to be installed then all distribution mains and service lines shall be installed before street construction is complete.
(2)
A written statement to the city designating how the subdivision will be served by electrical, natural gas, telephone and cable television. Utility construction shall be coordinated with street construction to avoid unnecessary pavement cuts.
(h)
Design summary. A separate document or report entitled engineering design summary shall be submitted with final plans and specifications. This report shall summarize calculations and other engineering information pertaining to the major items of design significance as may be necessary in the city's review of the plans and specifications to determine whether the facilities proposed for construction have been designed in accordance with the intent of the design standards. Calculations should include drainage facilities, water demand, sewage flows, and any others which are considered necessary by the city.
(Code 1994, ch. 9, art. 32; Ord. No. 248, exh. A(art. 32), 3-24-1997)