Cost-share monies are available for the following options:
1. Removal of the intake,
2. Removal of intake to be replaced with a more dense pattern tiling,
3. Removal of intake and replacement with a rock inlet,
4. Materials for slotted riser.

* 75% cost-share for removal of structure or installation of Rock Tile Intake, with a cap of $300 per intake. Cost of materials for Slotted Riser Intake will be paid.

Operation and Maintenance Standard Rock Tile Inlet
* Replace open tile inlets with a rock filled trench to reduce the impact on water quality and balance the need for sufficient drainage.

Purposes:
* Reduce sediment, nutrients and pesticides entering tile drainage systems, rivers and lakes.
* To prevent damage to open inlet from heavy equipment.
* Allow excessive surface water to drain as effectively as open inlets.

Description:
* A 3-foot by 12-foot trench about 3 feet deep.
* Filled with rock, it diffuses the flow of water into a perforated, fabric-covered pipe at the bottom of the trench.

Construction:
* Excavate the area around the existing open intake in order to remove it.
* Excavate a trench 2 to 3 feet wide by 12 to 15 feet long by 3 to 4 feet deep, perpendicular to tile line.
* A 12 to 15 foot section of 5 inch pipe with 5/8" holes a "Big-O" sock is connected to the tile line.
* Finally, the excavated area is filled with about four cubic yards of 1/2 to 3/4 inch pea rock.
* Make sure the rock that is used is washed rock and that it does not have any fines in it. The fines will reduce the effectiveness of the inlet over a period of time.
* When constructing a rock tile inlet, use the excavated material as a berm downstream to collect runoff.

Management Tips:
* For areas with larger watersheds, it may be beneficial to install two or three inlets to provide adequate drainage and reduce crop loss.
* Conservation / reduced tillage practices should be implemented on the watershed area. This should extend the life expectancy of inlets by keeping the soil particles on the upland area.
* Lift equipment over rock tile inlet area to prolong the life of the rock tile inlet.
* Excessive buildup of crop residue from severe storms may affect the performance of the rock tile inlet.
* After several growing seasons, it may be advantageous to pull a chisel plow through the rock inlet to loosen up any tire compaction.
* Soil that is mixed into the rock inlet does not significantly migrate below the tillage line.
* Eventually, the top 1 foot of rock may need to be removed and replaced with clean rock.