Article VI. PLATS, STREETS, UTILITIES AND OTHER INFRASTRUCTURE IMPROVEMENTS  

(A)

Preliminary plats.

(1)

The following data will be shown on the preliminary plat:

(a)

Recorded lot lines, property lines, survey abstract lines, corporation lines and the location of existing utilities, utility easements, streets, highways, expressways and freeways traversing, abutting or within a reasonable distance, and referenced to the City of Duncanville GPS Control Network.

(b)

The proposed locations and widths of streets, alleys, easements, walkways, and open channels.

(c)

The title of subdivision or addition, name and address of subdivider and surveyor platting the tract.

(d)

The location of all existing buildings, underground structures, or other existing features within the area proposed for subdivision.

(e)

Proposed arrangement of lots and proposed use of same, provided however, approval of a preliminary plat or final plat with uses so indicated does not constitute approval of such uses.

(f)

Sites, if any, to be reserved or indicated for parks, playgrounds or other public uses.

(g)

Scale, north arrow, date and other pertinent data.

(h)

Contours with intervals of five feet or less shall be shown for the area. All elevations on the contour map shall be referenced to the City of Duncanville GPS Control Network.

(i)

All physical features of the property to be subdivided, including location and size of all watercourses, ravines, bridges, culverts, existing structures, drainage area in acres or areas draining into subdivisions, and other features pertinent to subdivision. The outline of wooded areas or the location of important individual trees may be required.

(j)

Boundary lines, bearings and distances sufficient to locate the exact area proposed for the subdivision.

(k)

The name and location of all adjoining subdivisions shall be drawn to the same scale and shown in dotted lines adjacent to the tract proposed for subdivision in sufficient detail to show accurately the existing streets and alleys and other features that may influence the layout of development of the proposed subdivision. Adjacent unplatted land shall be so designated. If there is no adjacent subdivision, then a map on a smaller scale must be presented to show the nearest subdivision and how the streets, alleys or highways in the subdivision submitted may connect with those in the nearest subdivision.

(l)

Lot or tract numbers and/or city block numbers addition names, and dates recorded.

(2)

All plats shall be printed on good grade processed paper blue line or direct black and white.

(3)

All plats shall be drawn with north direction to the top or left side of map.

(B)

Final plats. Engineering plans showing details of streets, alleys, culverts, bridges, storm sewers, water mains, sanitary sewers and other engineering details of the proposed subdivision shall be submitted to the director of public works along with the final plat of the subdivision. Such plans shall be prepared by a registered professional engineer and shall conform to the design standards established by the City of Duncanville, and referenced to the City of Duncanville GPS Control Network. The final plat shall conform to the following:

(1)

All final plats shall be submitted on sheets 24 inches by 36 inches and to a scale of not less than 100 feet to the inch or larger. Where more than one sheet is required to encompass the subdivision, an index sheet, 24 inches by 36 inches, shall be filed showing the entire subdivision together with the complete dedication, attests, dates, titles and seals, on one sheet.

(2)

The exterior boundary of the subdivision shall be indicated by the distinct dash line and corner markers by individual symbols.

(3)

The length and bearing of all straight lines, radii, arc lengths, tangent length and central angles of all curves shall be indicated along the boundary line of the subdivision and each block. All dimensions along the lines of each lot shall be shown. The curve data pertaining to block or lot boundary may be placed in a curve table at the base of the plat and prepared in the following manner:

CURVE TABLE

(4)

The names of all adjoining subdivisions, the dimensions of all abutting lots, lot and block numbers and accurate reference ties to courses and distances of at least two recognized land corners shall be shown.

(5)

The names and accurate location of all streets adjoining, abutting, or within not more than 500 feet of the subdivision shall be shown.

(6)

The location and dimension of any utility adjoining or abutting the subdivision or proposed with the subdivision shall be shown.

(7)

The description and location of all survey monuments placed in the addition or subdivision shall be shown. In all subdivisions and additions corners shall be established per the latest state law governing professional land surveyors. In addition, curve point markers shall be established of the same specifications as lot corners.

(8)

The final plat shall show a title including the names of the addition or subdivision, the names of the owner and surveyor, scale and location of subdivision with reference to original corner of an original survey and abstract number and a north point with true or magnetic north.

(9)

A certificate of ownership giving a metes and bounds description of the property, dedication of all streets, alleys, parkways and parks where donated to the City and dedication or reservation of all easements and drainageways to the public use, signed and acknowledged before a notary public by the owner of the land, shall appear on the face of the plat or index sheet of the plats where two or more sheets are required.

(10)

The certificate of the registered professional land surveyor who surveyed, mapped and monumented the land, which certificate shall be attested before a notary public, shall be placed on the face of the plat on index sheets of the plate together with the seals of the surveyor and notary public. Printed seals and signatures are prohibited except for extra prints that the owner or developer may need certified for other purposes. The certificate of the surveyor to be placed on the plat shall be as follows:

"KNOW ALL MEN BY THESE PRESENTS:

That I, _______, do hereby certify that I prepared this plat from an actual and accurate survey of the land and that the corner monuments shown thereon were properly placed, under my personal supervision, in accordance with the subdivision regulations of the City of Duncanville, Texas."

(11)

At the time the developer files the final plat with the director of public works, he shall also file a certificate showing that all taxes have been paid on the tract to be subdivided and that no delinquent taxes exist against the property.

(C)

Improvements required prior to acceptance of the subdivision by the city.

(1)

Monuments. Monuments as prescribed hereinabove shall be placed at all corners as required hereinabove.

(2)

Street, alley and sidewalk improvements

(a)

Before approval and acceptance of any final plat, the developer shall prepare, or have prepared, and submit two copies of the complete engineering plans of streets, alley, curbs and gutters, storm sewer and drainage structures, and water and sanitary sewer improvements for the area covered by the final plat. The developer shall have these plans prepared by his own engineers subject to approval of the plans by the City of Duncanville. The director of public works shall review the plans and specifications and, if approved, two sets shall be marked with the objections noted and one set returned to the developer for correction. After corrections, a minimum of six sets of engineering plans shall be submitted to the director of public works for approval. The city will retain four sets and the remainder will be returned to the developer. No work shall commence until engineering plans have been dated and signed by the director of public works or his designated representative. A three party contract shall be executed between the developer, contractor and city prior to any work being done in city right-of-way. As part of the three party contract, the contractor shall furnish the city payment and performance bonds in the amount of 100 percent of the contract amount from an approved surety company duly authorized to do business in Texas, and acceptable to the city. After approval of the plat, plans and specifications, and the execution of a three party contract, the developer shall cause his contractor to install the facilities in accordance with the approved plans and specifications and these regulations. The contractor shall have a set of engineered plans on the job site that has been signed by the director of public works. The developer shall cause his engineer to design, stake and supervise the construction of such improvements and shall cause his contractor to construct the said improvements in accordance with these regulations. The city will inspect the installation of the improvements. The developer shall pay for all testing which may be required by the city. When found to be installed in accordance with the plans and specifications, and after receipt by the City of Duncanville of a two year maintenance bond from each separate contractor in the amount of 100 percent of the contract price, along with three sets of "as built" plans and one set of "as built" sepias, and upon receipt of a letter of the contractor's compliance with these regulations, then the director of public works or his designated representative shall receive and approve for the City of Duncanville the title, use and maintenance of the improvements.

(b)

Local residential streets, with alley access shall be paved 27 feet wide from back of curb to back of curb. Local residential streets with no alley access shall be paved 31 feet wide from back of curb to back of curb. The minimum street improvements made by the developer shall be:

Street surfacing consisting of six inch thick reinforced concrete pavement (4,000 psi, #3 rebar at 18 inch centers or #4 rebar at 24" centers), with six inch integral curb and gutter, and adequate drainage inlets and structures to drain the area properly.

(c)

Neighborhood Office, General Office, Neighborhood Retail, Local Retail-2, General Retail, and Mixed Use-1 district streets shall be paved 37 feet wide from back of curb to back of curb. The minimum street improvements made by the developer shall be:

Street surfacing consisting of eight inch thick reinforced concrete pavement (4,000 psi, #3 rebar at 18 inch centers or #4 rebar at 24" centers) with six inch integral curb and gutter, and adequate drainage inlets and structures to drain the area properly.

(d)

Light and Heavy Commercial and Light and Heavy Industrial district streets shall be paved 37 feet wide from back of curb to back of curb. The minimum street improvements made by the developer shall be:

Street surfacing consisting of eight inch thick reinforced concrete pavement (4,000 psi, #3 rebar at 18 inch centers or #4 rebar at 24" centers) with six inch integral curb, and gutter with adequate drainage inlets and structures to drain the area properly.

(e)

Major thoroughfares shall be paved with two 34-foot wide sections separated by a 15-feet wide median. Secondaries shall be paved 45 feet wide. All dimensions are measured from back of curb to back of curb. The minimum street improvements made by the developer shall be eight inch reinforced concrete, 4,000 psi pavement with integral curb and gutter with adequate drainage inlets and structures to drain the area properly.

(f)

Sidewalks shall be four inches thick 3,000 psi concrete and shall conform to the requirements of article IV (F) as to location and width.

(g)

Alleys, when provided, shall be paved with reinforced concrete. See article IV (B) for requirements.

(3)

Drainage/Stormwater.

(a)

An adequate storm sewer system of a one hundred year (100-year) design, consisting of inlets, pipes, and other underground drainage structures with approved outlets shall be constructed where runoff of storm water and the prevention of erosion cannot be accomplished satisfactorily by surface drainage facilities. "Separate erosion control plans should be submitted by the developer for each project for approval by the director of public works. Areas subject to flood conditions as established by the city will not be considered for development until adequate drainage has been provided. In hazardous flood areas the minimum floor elevation shall be two feet above the 100-year floodplain, as established by the developer's engineer, in accordance with the floodplain ordinance of the City of Duncanville and the minimum finish floor elevations shall be shown on the final plat."

Editor's note— The sentence beginning with "Separate erosion ... was inadvertently left out. At the city's request this verbiage was placed in Appendix B.

(b)

Stormwater requirements for site design on all applicable developments and redevelopments shall conform to the most recently approved iSWM Criteria Manual by the City of Duncanville.

(4)

Water.

(a)

All subdivisions shall be connected with the City of Duncanville water supply distribution system. Without cost to the city, the developer shall install all water lines, including customer services up to, and including, an eight inch main. The engineer representing the developer shall prepare the plans and specifications for the water lines and present them to the director of public works for approval. After connection fees have been paid, meters will be furnished and installed by the water department. No meters will be installed by others. If the city requires lines in excess of eight inches, the city will pay the difference between the cost of the lines in excess of eight inches including the valves. The developer shall furnish the director of public works with copies of the bids received and payments made for the installation of water system. Such bids shall show unit cost in sufficient detail to enable the allocation of construction costs of various segments and sizes of mains installed by the developer. The city retains the right to reject the unit price and to determine and pay the representative prices of actual construction costs prevailing at the time. All construction costs shall be paid for by the developer. The developer in turn may apply for refund for the difference in price after the water main has been approved and accepted by the City of Duncanville.

(b)

Water systems shall have a sufficient number of outlets and shall be of sufficient size to furnish adequate supply and to furnish fire protection to all lots. The water system shall be designed and constructed in accordance with the master plan to allow for future development of adjoining properties and standard specifications of the City of Duncanville. Where possible, water mains shall be located in the street on the north side or the east side of the street.

(5)

Sewer improvements.

(a)

All subdivisions shall be connected with the City of Duncanville sanitary sewer system. Without cost to the city, the developer shall install all sewer mains including customer services up to, and including, an eight inch main. The engineer representing the subdivider shall prepare the plans and specifications for the sewer lines and present them to the director of public works for approval. If the city requires lines in excess of eight inches, the city will pay the difference between the cost of the lines in excess of eight inches. The developer shall furnish the director of public works with copies of the bids received and payments made for the construction of the sewer system. Such bids shall show unit cost in sufficient detail to enable the allocation of construction costs of various segments and sizes of mains installed by the developer. The city retains the right to reject the unit price and to determine and pay the representative prices of actual construction costs prevailing at the time. The developer shall pay for all construction costs. The developer in turn may apply for a refund after the sewer main has been approved and accepted by the City of Duncanville.

(b)

The developer shall furnish and install the complete sewerage system including the mains, manholes, cleanouts, Y branches and service laterals for all lots, lift stations and appurtenances. The sewerage system shall be designed and constructed in accordance with the master plan to allow for future development of adjoining properties and standard specifications of the City of Duncanville.

(c)

Any property use within the city limits shall be required to install and tie into a sanitary sewer main, unless granted a special sewer permit. Said special sewer permit may, in appropriate cases, be granted by the city council on such terms and conditions as may be necessary to protect the health and welfare of the city under the circumstances of each individual case. Said permit may be rejected if the city council finds that such permit will be detrimental to the health and welfare of the city.

(D)

Withholding improvements until approved.

(1)

The city will withhold all city improvements of whatsoever nature, including the maintenance of streets and the furnishing of sewerage facilities and water service from all subdivisions, if a final plat has not been approved by the commission and filed of record with the county clerk of Dallas County.

(2)

No construction work shall begin on the proposed improvements in any proposed subdivision prior to approval of the final plat by the City of Duncanville and the filing of such plat with the county clerk of Dallas County.

(3)

The City of Duncanville may withhold the issuing of a street number or building permit for the erection of any building in the City of Duncanville until all the requirements of these subdivision regulations have been complied with, including installation of and acceptance by the city of all waterworks, sewerage and paving improvements for the area designated.

(Ord. No. 759, § 1, 4-2-79; Ord. No. 1124, § 1, 7-20-87; Ord. No. 1949, § 2, 11-1-05; Ord. No. 2141, § 1, 10-18-11)