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Public Works > Water Resources > Engineering > Mapping & Inventory

Mapping & Inventory

The Engineering Team is responsible for the maintenance of the Geographic Information System (GIS) inventory of the county's stormwater pipes, ditches, and facilities.

This inventory includes infrastructure constructed by the county's various capital programs as well as by privately funded development.

This activity allows for the efficient and effective maintenance and monitoring of the systems as well as planning and designing system improvements and extensions.

The program maintains an inventory of privately owned and operated stormwater management facilities so they can be inspected for proper function. The team also provides support and oversight for the county's stormwater maintenance activities.

Mapping

The GIS database contains the following information:

  • Urban infrastructure - pipes, manholes, catch basins used for conveyance of stormwater
  • Stormwater facilities - all objects within a parcel for the purpose of storing and/or treating stormwater runoff. This inventory includes both public and privately maintained facilities.
  • Rural infrastructure - roadside ditches and culverts throughout the county
  • Outfalls - all locations where collected stormwater enters either a waterbody or the groundwater

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Inventory

The Engineering Team maintains an inventory of privately owned and operated stormwater management facilities so they can be inspected by county staff for proper function. The team also provides support and oversight for the county's stormwater maintenance activities.

Current stormwater inventory: (Quanities may not reflect most recent annexation boundaries)

Type Quantity
Catch basins 15,850
Cleanout 1,778
Flow control structures 670
Manholes 7,772
Outfalls 944
Valves 29
Plugs/caps 1,281
Storage Treatment
Wet vaults 44
Debris barriers 58
Detention ponds 578
Drywells 1,757
Energy dissipators / flow spreaders 3,004
Infiltration basins 86
Oil-water separator 64
Sand filters 18
Sediment traps 273
Stormwater filters 237
treatment wetlands 56
other objects 325
Natural Channels
Ditches 5,655 / 520 miles
Swales 1,305 / 36 miles
Pipes
Inline storage 414 / 7.7 miles
Culverts 3,625 / 36 miles
Storm pipe 29,203 / 476 miles
Stormwater Facilities
Public 673
Private 949

 

For more information on stormwater mapping and inventory contact Henry Schattenkerk at (360) 397-6118 ext. 4546.

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Clark County Public Works - Clean Water Program: Ron Wierenga, Program Manager
Street Address: 1300 Franklin Street, 1st Floor, Vancouver, WA 98660
Mailing Address: P.O. Box 9810, Vancouver, WA 98666-9810
Main phone: (360) 397-6118 ext. 4345 | Fax: (360) 397-2062
TTY: (360) 397-6057
E-mail: cleanwater@clark.wa.gov

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