(A) The following schedule of improvements requirements establishes general policy on the types of utility and street improvements, and street right-of-way cross sections for the various types of subdivision development.
(B) This schedule may be supplemented by public improvement standards establishing design and material specifications to be used in all public improvements installed pursuant to these regulations.
(1) Schedule of improvement requirements.
(a) Major thoroughfares. Where an existing road abuts the subdivisions, the proprietor shall improve his or her half of said road to a width and standard equal to the County Road Commission right-of-way plan, if applicable, and the Master Plan; subject plans to be approved by the Municipal Engineer. The proprietor shall install five-foot concrete sidewalks along his or her half of said road, and street trees unless waived by the municipality as not being in character with the land use of the frontage;
(b) Local subdivision streets. Sixty-foot right-of-way; 27-foot pavement measured back-to-back of curbs; five-foot concrete sidewalks both sides; street trees; however, where parking will be permanently prohibited in roadway, and adequate provision for off-street parking is accordingly made, the pavement width may be reduced to 22 feet;
(c) Neighborhood collector-distributor streets. Eighty-six-foot right-of-way; 39-foot pavement measured back-to-back of curbs; five-foot concrete sidewalk both sides; street trees;
(d) Boulevard streets. Eighty-foot right-of-way; two 20-foot pavements measured back-to-back of curbs and separated by 18-foot minimum island; five-foot concrete sidewalk next to both right-of-way lines; street trees in island and along both sides;
(e) Marginal access streets. Forty-foot right-of-way abutting major street right-of-way; Eighteen-foot pavement measured back-to-back of curbs; curb on outside pavement edge; curb on inside pavement edge if major street is curbed; no curb on inside if major street has swale drainage; grassed island; five-foot sidewalk on outside only; street trees on outside only;
(f) Cul-de-sac streets. Same as division (B)(1)(b) above except for turning circle with 120-foot diameter right-of-way; 27-foot pavement with 45-foot outside radius; landscaped island; curb all pavement edges; five-foot concrete sidewalk both sides; street trees;
(g) “U” streets. One hundred twenty-foot right-of-way; two 18-foot pavements measured back to back of curbs and separated by a 44-foot island; terminated by turning circle with 120-foot diameter right-of-way pavement with 40-foot outside radius; curb all pavement edges; five-foot concrete sidewalk both sides; street trees in island and along both sides;
(h) Alleys. Twenty-foot right-of-way; 20-foot pavement with reverse crown;
(i) Street and lot grading. Per plans and profiles approved by Municipal Engineer;
(j) Curb or curb and gutter details and specifications. Approved by Municipal Engineer;
(k) Pavement details and specifications. Approved by Municipal Engineer;
(l) Sidewalk details and specifications. Approved by Municipal Engineer;
(m) Street trees. In accordance with standards of variety, size, and installation adopted by the governing body, shall be planted 60 feet apart, between curb and sidewalk;
(n) Street signs. Shall be placed at all intersections by the time of completion of pavement. Detail and specifications in accordance with adopted standards of municipality; and
(o) Monuments. Installed in compliance with law. After installation of improvements, the proprietor shall have a registered engineer or surveyor check the location of monuments and certify to their accuracy in accordance with the law.
(2) Utility improvements.
(a) Water supply and sewage disposal shall be installed as extensions and part of the municipality’s public systems in accordance with the municipality’s standards. Subdivision systems of water supply and/or sewage disposal may be acceptable if there are no public systems within 3,000 feet of the subdivision. Such subdivision systems shall be designed to be capable of ultimately tying in with municipal systems. Individual wells and/or septic tanks shall not be approved for any lot of less than 125 feet frontage and 20,000 square feet lot area.
(b) Such facilities shall be so located and designed to facilitate economical connection with future public systems.
1. Drainage requirements. All frontage having lots shall be furnished with enclosed storm drainage.
a. In addition to proposed development, all existing roads within or abutting the plat shall be drained to acceptable outlet.
b. All drains shall be located in public easements of a width to be determined by the Municipal Engineer.
c. Drainage collection basins, where approved, shall be public easements for municipal access.
d. All lots shall be graded to avoid impounding of surface water on any lot.
2. Electric and telephone lines. In the following situations, electric and telephone distribution lines shall be buried:
a. Residential subdivisions of ten or more lots, with an average lot width of 100 feet or less;
b. Multiple apartment developments of more than 24 apartment dwelling units; and
c. Mobile home parks, shopping centers, office districts, and commercial districts of more than 15 acres.
3. Waiver. This requirement may be waived by the Planning Commission and/or Zoning Commission, as required, where it finds that because of unusual conditions such as subsoil conditions or lot arrangements, the proprietor’s average cost per residential lot would exceed $160; per apartment dwelling or mobile home site would exceed $50; or for other types of development would exceed $30 per lineal foot of buried line.
(1984 Code, § 6-02-05-030) (Ord. 11, passed 8-26-1969)