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Protection of Environmentally Sensitive Areas in Boone County

What is an Environmentally Sensitive Area?

An environmentally sensitive area is any area in which plant or animal life or their habitats are either rare or especially valuable because of their special nature or role in an ecosystem.  These areas may also contribute water to the habitat of an aquatic animal that is rare or valuable; or have increased vulnerability where proposed human activities could cause damage to the environment.  Some examples would be where karst features are present, steep terrain, or highly erodible soils (Boone County Stormwater Ordinance, Section 2).

Karst features are formed when rainwater at the surface combines with carbon dioxide and makes a weak carbonic acid solution.  This mildly acidic water finds its way down through cracks and joint in the bedrock and dissolves the surrounding limestone.  Boone County has a system of karst topography west and south of Columbia.  Karst structures found in this area are comprised of numerous sinkholes overlying a network of caves and losing streams(Soil Survey of Boone County, Missouri)

 

What is a sinkhole?

A sinkhole is a rounded depression in the landscape caused by collapsed underground caves.  Sinkholes collect runoff from surface water that goes directly into groundwater.  There are over 418 sinkholes in Boone County; most of which are located south of I-70 near Rocheport and Pierpont.

 

Boone County’s Stormwater Ordinance requires that any runoff from development or redevelopment discharging to a groundwater recharge feature, such as a sinkhole or a cave, the land disturbance threshold is lowered to 3,000 square feet.

 

Losing Stream

What is a losing stream?

A losing stream is one that delivers thirty percent (30%) or more of its flow to groundwater within two (2) miles’ flow distance downstream of an existing or proposed discharge.

According to the Stormwater Ordinance, when development or redevelopment is within 1000 feet of; or drains to an identified losing stream, the land disturbance threshold is dropped to 3000 square feet.

 

 

Losing Streams in Boone County

 

Waterbody name
Miles
Coordinates
1

Trib. to L. Bonne Femme Cr.

1

SE SE NW 01 47N 13W SE NE NW 12 47N 13W

2

Trib. to Clear Cr.

1

SE SW SW 31 48N 12W SW SE SW 30 48N 12W

3

Trib. to Gans Cr

1

SE SW NE 06 47N 12W NE NE NW 07 47N 12W

4

Slate Cr

1.5

SE SW SE 34 46N 12W NW NE SE 09 45N 12W

5

Trib. to Jamerson Cr.

2

NE SE SE 21 46N 12W SW NE SW 29 46N 12W

6

Bonne Femme Cr.

4

NW NE NW 10 47N 12W NE NE SW 20 47N 12W

7

Trib. to Bonne Femme Cr.

1.5

SW NE SE 29 47N 12W SE SE NW 30 47N 12W

8

Trib. to Fowler Cr.

1.5

SW SW NW 13 46N 12W SE NE SW 24 46N 12W

9

Bass Cr.

0.5

SW NW NE 28 47N 12W SE NW NW 28 47N 12W

 

Class P Streams                                                                                   Class P Streams in Boone County

Class P streams are streams that maintain permanent flow, even during drought conditions.  Per the stormwater ordinance, the land disturbance threshold is dropped to 3000 square feet for any discharge or drainage from new development or redevelopment within 100 feet of a class P stream.  The class P designation starts at the mouth of the river and includes the distance shown on the table below, in river miles.

Waterbody Name
Miles
1

Bonne Femme

7.8
2

Hinkson Creek

7.6
3

Little Bonne Femme

9
4

Perche Creek

11
5

Perche Creek

17.5
6

Sugar Branch

2.3

 

Cave StreamWhat are Outstanding State Resource Waters?

These are high quality waters that have a significant aesthetic, recreational, or scientific value.  Outstanding State Resource Waters (OSRW) are specifically designated by the Clean Water Commission.  All of the State Resource Waters in Boone County are associated with a Conservation Area (CA) or State Park (SP).

As stated in the Stormwater Ordinance for Boone County, any development or redevelopment is within 1000 feet of; or drains to an OSRW, the land disturbance threshold is dropped to 3000 square feet, and the required distance for the stream buffer setback is doubled.

 

Outstanding State Resource Waters in Boone County

 

Waterbody name
Miles
Location
1

Bass Creek

1

Three Creeks CA

2

Bonne Femme Creek

2

Three Creeks CA

3

Devils Ice Box Cave Branch

1.5

Rock Bridge SP

4

Gans Creek

3

Rock Bridge SP

5

Turkey Creek

4.6

Three Creeks CA

 

 

US Fish & Wildlife

Endangered Species List for Boone County

Species
Status
Habitat

Gray bat

 

(Myotis grisescens)
Endangered
Caves

Indiana bat

 

(Myotis sodalis)
Endangered

Caves and mines;

 

Maternity and foraging habitat: small stream corridors with well developed riparian woods; upland forests

Bald eagle

 

(Haliaeetus leucocephalus)
Threatened
Statewide in Winter

Pallid sturgeon

 

(Scaphirhynchus albus)
Endangered
Mississippi and Missouri Rivers; Sturgeon will travel upstream into Perche Creek during flood events.

Running buffalo clover

 

(Trifolium stoloniferum)
Endangered
Disturbed bottomland meadows

Topeka shiner 

 

(Notropis topeka)
Endangered

Small prairie (or former prairie) streams in pools containing clear, clean water.

Most Topeka shiners are found in perennial streams (flow year-round), or streams maintained by groundwater seepage. Topeka shiners need streams with clean gravel, rock, or sand bottoms.

 

References:

Code of State Regulations, Rules of Department of Natural Resources, Division 20 Clean Water Commission, Chapter 7 Water Quality.

http://www.sos.mo.gov/adrules/csr/current/10csr/10c20-7.pdf

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