§ 1803S.8. Lines and Grades

All lines, grades and control measures shall be furnished, checked and/or replaced as necessary by the Owner/Developer. The Contractor shall provide assistance, as necessary, to conduct these checks. Whenever necessary, construction shall be suspended to permit the performance of this Work and to allow the Inspector to review and check, if necessary, these procedures. Suspension will be as brief as practical. Four copies of "Cut and Fill" sheets or other approved provisions for line and grade control for road, bridges, water and wastewater lines, storm sewer and other drainage structures or systems, along with required certifications shall be delivered to the Construction Inspection Division for distribution. The sheets shall be certified by a Licensed Professional Engineer Registered in the State of Texas or a Licensed Professional Land Surveyor Registered in the State of Texas. Minimum staking requirements for roadways, bridges, water and wastewater lines, storm sewers and channels are as follows:

A.

Roadways

1.

Offset hubs must be provided on both sides of the roadway.

2.

Straight grades at 50 feet (15 meters) maximum spacing with transverse quarter points.

3.

Vertical curves at 25 feet (7.5 meters) maximum spacing with transverse quarter points.

4.

BC, EC and stations of vertical curves with elevations.

5.

PC, PT and stations of horizontal curves with elevations.

6.

Horizontal curves at 25 feet (7.5 meters) maximum spacing with transverse quarter points.

7.

Both ends, offsets and transitions of curb inlets.

8.

High and low points of vertical curves.

9.

Grade breaks.

10.

Islands - all of the above points.

11.

Separate subgrade cut sheets are not needed.

12.

Roadway transitions.

13.

Slope stakes for top and toe of slopes.

B.

Storm Sewers

1.

Every 50 lineal feet (15 meters) maximum spacing.

2.

Grade breaks with elevations.

3.

PI, forward and backward tangents for horizontal curves.

4.

Horizontal curves at 25 feet (7.5 meters) maximum spacing.

5.

PC and PT stations for horizontal curves.

6.

Flow lines into and out of manholes, junction boxes and splitter boxes.

7.

Tie-in to existing storm sewers.

8.

Flow line of storm sewer and channel where they intersect.

9.

Double stake ends of storm sewer

10.

Headwalls

C.

Channels

1.

Every 50 lineal feet (15 meters) maximum spacing.

2.

P.I., P.C., P.T., stations of all horizontal curves.

3.

Horizontal curves, 25 feet (7.5 meters) maximum spacing.

4.

All offsets to centerline of channel.

5.

Flow line of storm sewer and channel where they intersect.

6.

Grade breaks with elevations.

7.

Dissipators - break points, beginning and end.

D.

Water Pipelines

1.

Every 50 lineal feet (15 meters), maximum spacing.

2.

PI, PC, PT, PRC, PCC and stations of horizontal curves.

3.

Horizontal curve stations at 25 feet (7.5 meters) maximum spacing.

4.

Reference all offsets to the centerline of pipe.

5.

Tie-in both ends to existing pipe.

6.

Vertical PI stations with elevations.

7.

"Cut and Fill" sheets are not required for water lines less than 12" (300 mm) inside diameter (ID).

8.

Pipe lines 12" (300 mm) ID and larger will be laid out according to pipe layout plan if required by the technical specifications,

9.

Where the pipe layout plan indicates a straight pipe section with no grade change it is permissible to layout every 50 feet (15 meters).

10.

All pipe joint deflections along vertical and horizontal curves and angle points with elevations.

11.

All points along the construction staked line will have a hub driven in the ground with a known elevation obtained from a USGS reference datum.

12.

All structures and appurtenances shall be staked at beginning, end and any intermediate point deemed necessary.

E.

Wastewater Pipelines

1.

Every 50 lineal feet (15 meters) maximum spacing.

2.

Grade breaks.

3.

Inlets and outfalls of all manholes.

4.

Forward and backward tangents of horizontal curves.

5.

Horizontal curves at 25 feet (7.5 meters) maximum spacing.

6.

PC, PT, PCC, PRC stations of horizontal curves with elevations.

7.

All offsets referenced from the centerline of pipe.

8.

All points along the construction staked line will have a hub driven in the ground with a known elevation obtained by U.S.G.S. reference datum.

9.

All structures and appurtenances shall be staked at beginning, end and any intermediate point deemed necessary.

"Cut or Fill" sheets shall be transmitted to contractors through the Inspector. Each point or station on a "Cut or Fill" sheet shall have a hub set and identified on the ground.