Exam 1 vocab

Question 1

What is a wetland?

Answer 1

An area with high or seasonally high GWT, certain types of plants and soil

Question 2

Why do we care about wetlands?

Answer 2

1. The provide a natural detention pond
2. they filtrate out contaminants
   3.The are habitats for many species some of which are endangered

Question 3

Who has authority over wetlands?

Answer 3

Corps of engineers,
IDEM

Question 4

How to determine if a site has wetlands?

Answer 4

1. Preliminary review (online databases - national wetland inventory) or field survey
2. formal investigation

Question 5

Forested wetland

Answer 5

trees more than 15’

coverage more than 20% of area

Question 6

Scrub wetland

Answer 6

shrubs or small trees less than 15’

20% of land area

Question 7

Emergent wetland

Answer 7

weedy plants

plants come back yearly (perennial)

80% coverage

Question 8

Things to look for in formal investigation of wetland

Answer 8

hydric soil looks dark frequently organic

hydrophytic vegetation- plants that thrive in wet soils

Wetland hydrology- ponded water during portions of the year

Question 9

What to do if you can’t avoid wetland?

Answer 9

Get a permit
1. Show how affect was minimized
2. Show how to compensate loss of wetlands

Question 10

What is Wetland mitigation and how and how much?

Answer 10

There will be no net loss of wetland

1. create a new wetland somewhere
2. restore existing wetland
3. enhance existing wetland

Depends on the impact of destroying the wetland 1:1 to 3:1

Question 11

Floodplains definition and concerns

Answer 11

Any area susceptible to flooding at any time from any source.

1. site will be flooded
2. development could shift flood plain to new areas

Question 12

FEMA

Answer 12

Federal emergency management agency

Produce maps showing floodplains

They’re involved in natural disasters with floods

Question 13

Base flood event

Answer 13

an event that has a 1% chance of producing a flood in a given year

Question 14

Base flood elevation

Answer 14

Elevation of base flood

Question 15

Regulatory floodway

Answer 15

Zone where flooding occurs

Question 16

Fringe

Answer 16

low flow, low impact,

2 feet deep of less

Question 17

SFHA

Answer 17

Special flood hazard area

Specific zones where flooding occurs

Question 18

SFHA- X meaning

Answer 18

not in floodzone

Question 19

SFHA- AE meaning

Answer 19

In flood zone
know base flood elevation

Question 20

SFHA- A meaning

Answer 20

In flood zone
dont know base flood elevation

Question 21

Developing in SFHA

Answer 21

1. Develop at least two feet above BFE with piles of fill
2. Protect utilities
3. Strap down tanks to prevent floating

Question 22

Parking space dimensions
ADA car?
ADA van?

Answer 22

normal- 9’x18’
ADA car - 8’ wide 5’ aisle
ADA van- 11’ wide 5’ aisle or
8’ wide, 8’ aisle

Question 23

Aisle dimensions

Answer 23

one way - 18’
two way - 24’
one way skewed - 15’

Question 24

9 types of utilities

Answer 24

1. Electrical
2. Sanitary sewers
3. storm sewer
4. potable (water)
5. cable
6. internet
7. natural gas
8. Phone
9. fiber optic

Question 25

Public vs private utilities

Answer 25

Public - connects to existing utilities Private - All of the site - responsibility of owner

Question 26

Private system

Answer 26

Water- install wells Sanitary- septic system

Question 27

Water mains

Answer 27

Located in ROW, size 6-20" Can be PVC or ductile iron

Question 28

Service lateral Water

Answer 28

Perpendicular to the water main copper or ductile iron 1-2.5"

Question 29

3 Types of sanitary sewers

Answer 29

1. Gravity sewer 2. Force main 3. septic

Question 30

Sanitary service laterals What can be found in the ordinance?

Answer 30

45 degrees to the sewer main 1. type of connection to the main 2. location of the connection (from wells, water) 3. pipe diameter/slope

Question 31

Where are gravity sewer manholes needed

Answer 31

1. change in direction 2. For cleanout 3. Change in slope 4. Change in diameter Drop manhole if the difference in inverts more than 2 feet

Question 32

What do impervious surfaces cause?

Answer 32

increased water flow Erosion Water quality issues

Question 33

Methods to store stormwater

Answer 33

Swale (ditch) Basin Green roof (plants and grass) Blue roof (water stored on the roof) Underground storage (tanks, pipes)

Question 34

six steps for stormwater

Answer 34

1. pre-development impervious area 2. development of the impervious area 3. Compute the required storage area 4. Compute the required storage volume 5. Store water on site (pervious concrete) 6. Check release rate