Chapter 12.12
EXCAVATIONS
Sections:
12.12.020 Permit – Application – Bond.
12.12.030 Bond – Return or cancellation.
12.12.040 Refilling specifications.
12.12.050 responsibility for defects.
For statutory provisions authorizing cities to require removal of encroachments from public ways, see Gov. Code §38775; for provisions on abandoned excavations, see Gov. Code §50230 et seq.
12.12.010 Permit – Required.
It is unlawful for any person to dig, drill or otherwise break the surface of any street, alley or other roadway or sidewalk in the city without first obtaining a permit to do so, prior to the beginning of any such digging, drilling or otherwise breaking, from the superintendent of streets, or his authorized deputy. (Prior code §17.5).
12.12.020 Permit – Application – Bond.
An application, in writing, must be filed with the superintendent of streets, and upon receipt of such application the superintendent of streets shall make an inspection of the surface to be broken, measure the extent of the aperture and set forth such measurements and location on the permit, which permit shall require the applicant to deposit with the city clerk an amount equal to one dollar per square foot of the aperture, or the execution of a corporate surety bond in a form approved by the city attorney in an equal amount to the city conditioned for the faithful performance of the requirements set forth in this chapter, and then such permit shall be issued by the superintendent of streets or his deputy. (Prior code §17.6).
12.12.030 Bond – Return or cancellation.
The amount so deposited in accordance with the provisions of Section 12.12.020 will be returned to the applicant, or the bond cancelled within ninety days after the completion of the requirements set forth in this chapter and after an inspection of the work by the superintendent of streets and the issuing of his certificate showing that requirements set forth in this chapter have been complied with. (Prior code §17.7).
12.12.040 Refilling specifications.
Before the certificate mentioned in Section 12.12.030 of this code is issued, the applicant shall have refilled and repaved the excavation in accordance with the following specifications:
A. General. Except as otherwise specified, all materials and all methods of construction shall conform with the Standard Specifications, Division of Highways, Department of Public Works, state of California, dated August, 1954, hereinafter called the “Standard Specifications.”
B. Backfilling Trenches.
1. The trench backfill shall be either settled with water or compacted with machine tamping equipment.
2. If the trench backfill is settled with water, the trench shall be filled with excavated material and thoroughly jetted with water and puddled with a long stick or iron bar. After the backfill has become dry and stable, the fill shall be brought up to subgrade with fine, drier material and compacted with a road roller, the rear wheels of a truck loaded with five tons, or machine tamping equipment until the relative compaction of the subgrade to the depth of six inches shall be not less than ninety-five percent (Section 6, Chapter II b 1 of the Standard Specifications).
3. If the trench backfill is compacted with machine tamping equipment, the backfill up to the subgrade shall have a relative compaction of not less than ninety percent (Section 6 Chapter II b 1 of the Standard Specifications). The relative compaction of the subgrade to a depth of six inches shall be not less than ninety-five percent (Section 6, Chapter II b 1 of the Standard Specifications).
C. Repaving Trenches.
1. Where there is a street with an existing plant-mixed surfacing or asphalt concrete pavement, the trench shall be paved with six inches of portland cement concrete and two inches of plant-mixed surfacing.
2. Where there is a street with an existing seal cost, armor coat, road mix or any other type of pavement that is bituminous in nature, regardless of the condition or state of repair, the trench shall be paved with six inches of untreated base and two inches of plant-mixed surfacing.
3. Where there is a street that has a rock surfacing on it, regardless of the condition or state of repair, the trench shall be paved with six inches of untreated base.
4. Portland cement concrete shall conform to the requirements of Section 26 a, b, c, d, e, f, g, h, i, j and k of the Standard Specifications. Concrete shall be Class B concrete containing five sacks of portland cement per cubic yard of concrete.
5. Plant-mixed surfacing shall conform to the requirements of Section 20, Chapter I ab (Type A plant-mixed surfacing) and c, Chapter II a (200-300 paving asphalt shall be used), and b (1/2-inch maximum size mineral aggregate), Chapter III a, b, c, Chapter IV a, Chapter V a (in advance of spreading plant-mixed surfacing, a prime coat of asphalt paint binder shall be applied to the base and vertical sides of the adjoining existing pavement), Chapter VI (a tandem type power roller shall be used), Chapter VII a and Chapter VIII a of the Standard Specifications.
6. The untreated base shall conform to the requirements of Section 16 a, b, c, d, of the Standard Specifications, the untreated base shall be compacted with a road roller, the rear wheels of a truck loaded with five tons or machine tamping equipment until the relative compaction is not less than ninety-five percent (Section 6, Chapter II b 1 of the Standard Specifications). (Prior code §17.8).
12.12.050 responsibility for defects.
The acceptance of the work by the superintendent of streets or his deputy or the city council shall not relieve the applicant of responsibility for faulty materials or workmanship, and he shall remedy any defects thereto and pay for any damage to other work resulting therefrom which shall appear within a period of one year from the date of acceptance by the city. The remedying of any defects shall include the bringing to grade the settlement of any trenches and the repairing of any paving. The city shall give notice of observed defects with reasonable promptness. (Prior code §17.9).