HomeMy WebLinkAbout007 Appendix A - Drain Tile Mainenance PlanAPPENDIX A
DRAIN TILE MAINTENANCE PLAN
03/03/23
22203 Norton
East Ranch Ph.
5B FP
INSPECTION AND MAINTENANCE FOR
DRAIN TILE FACILITIES
Drain Tile Facilities:
1.The drain tile consists of 2,485 linear feet of 12” A-2000 PVC pipe. The PVC pipe has
perforated and solid wall sections. The pipe is bedded in washed gravel and surrounded
by non-woven geotextile fabric.
Semi-Annual Inspection:
1. During periods of high ground water, check outlet for signs of erosion. Ensure that
groundwater is allowed to flow freely from the system.
Standard Maintenance:
1. The drain tile is a passive system, requiring minimal maintenance. If indications of
erosion are found near the outlet, armor the outlet with Class 1 Rip Rap. Access to the
outlet and Aajker Creek is provided via an easement on file at Gallatin County, under
Document Number 2579167.
Sediment accumulation:
Sedimentation is not expected within the system. In most cases, sediment does not contain toxins
at levels posing a hazardous concern. However, sediments should be tested for toxicants in
compliance with current disposal requirements and if land uses in the drainage area include
commercial or industrial zones, or if visual or olfactory indications of pollution are noticed.
Sediments containing high levels of pollutants should be disposed of in accordance with
applicable regulations and the potential sources of contamination should be investigated and
contamination practices terminated.
Equipment Type/Access:
The outlet point of the drain tile system is accessible through a public park and the
aforementioned easement. An excavator may be required if the outlet is found to have evidence
of erosion.
Cost Estimate:
Depending on the amount of rainfall in the given year, the cost to maintain the drain tile
infrastructure will vary. It is estimated that the outlet will need to be inspected once or twice a
year, with an estimated cost of $500 to do so. Placement of additional Class 1 Rip Rap has an
estimated cost of $1,500. The costs for the drain tile maintenance and repair will be covered by
the standard stormwater maintenance fees associated with the subdivision.
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