This work shall include the installation of pipe culverts in the locations shown on the plans.
Reinforced concrete pipe and asphalt-coated corrugated metal pipe, along with all fittings, joint seals and bedding material, shall conform to State Form 810, Article M.08.01. Gravel fill shall conform to State Form 810, Article M.02.01.
A. 
Trenching and backfilling for storm drains shall conform to the applicable requirements of Article IV, Trench Excavation.
B. 
The bottom of the trenches shall be accurately graded to provide bedding which consists of a uniform bearing and support for each section of the pipe on undisturbed soil at every point along its entire length, except for the portions of the pipe sections where it is necessary to excavate for bell holes and for the proper seating of pipe joints. Bell holes and depressions for joints shall be dug after the trench bottom has been graded, and in order that the pipe rests on the prepared bottom for as nearly its full length as practicable, bell holes and depressions shall be only of such length, depth and width as required for properly making the particular type of joint.
C. 
All pipe shall be carefully laid, hubs upgrade, spigot end fully entered into the adjacent hub, true to lines and grades given.
D. 
Joints in concrete pipe shall be sealed with either cold-applied bituminous sealer, preformed plastic gaskets or flexible, watertight, rubber-type gaskets.
E. 
When cold-applied bituminous sealer is used, the bell-and-spigot or tongue-and-groove pipe shall be wiped clean and dry before applying the bituminous sealer to the pipe joint. Before the pipes are placed in contact with each other, the spigot or tongue end shall be completely covered with an excess of bituminous sealer, then the pipe shall be laid to line and grade so the inside surfaces of the abutting pipes are flush. The joints shall be completely filled with bituminous sealer. All excess joint sealant shall be removed from inside of the pipe.
F. 
Metal pipe and pipe arches shall be carefully jointed and firmly clamped together by approved connecting bands which shall be properly bolted in place before any backfill is placed.
G. 
Corrugated structural plate pipe, plate arches and plate pipe arches shall be constructed in conformity with the plans or as ordered, shall be true to lines and grades given and shall have a protective bituminous coating applied by an approved method on the inside and outside of the plates. The coating material shall be composed of a tar base pitch, blended with solvents to a heavy paste-like consistency. Before applying the coating, the metal shall be cleaned, to the extent possible, of all dust, dirt, oil, unbonded or incompatible paint, grease, acids, alkalies or other foreign matter.
H. 
If so ordered by the Engineer, any pipe which is not in true alignment or which shows any settlement or distortion after laying shall be taken up and relaid or corrected to the satisfaction of the Engineer.
I. 
Where indicated on the plans or directed by the Engineer, existing pipe culverts shall be taken up and relaid or extended and renewed in the same manner as specified herein for new pipe culverts.
J. 
Where shown on the plans or directed by the Engineer, the contractor shall connect the proposed drainage system(s) with existing drainage structures or pipes. This work shall be performed in a workmanlike manner.