Project & Cost Estimate Questionnaire
For Hydraulic Dredging Projects

To provide a cost estimate for a project, please answer as many of the questions as you can. If you have any questions, about the questions, feel free to call Don Searles at 217-259-2229.  It is suggested that before you fill out this questionnaire that you read the articles Dredging 101 and What Engineers Need to Know

I suggest that you copy this questionnaire, paste it in a Word document, and put your answers in red type beside or below the question.  Then E-Mail the completed questionnaire to

Please use the U.S. measuring system of feet, cubic yards, etc.

1) The distance in miles from Mattoon, Illinois. 61938 to the project site.

2) Describe the dredge site.  River, settling pond, lake, harbor, etc. 

3) The length and width of the area to be dredged.

4) The depth of material to be dredged. 

a) The minimum depth.

b) The maximum depth.

c) The maximum distance from the water surface to the bottom of the deepest cut.

5) The number of cubic yards of material to be dredged.

6) The spoil area must be 1.3 times the cubic yards to dredge. 

a) Do you presently have a spoil area large enough to contain the material?  

b) If not, do you have a location where the spoil area can be built?

c) List the area of the potential spoil area.

7) The maximum distance that the material must be pumped.

8) The minimum distance that the material must be pumped.

9) The elevation above sea level of the site.

10) The static head.  This is the elevation difference, in feet, between the water surface where dredging will take place and the elevation where the material will be discharged.

11) Is the material all in one location, or will the dredge need to be moved from one location to another?  If the dredge must be moved: 

a) List the size of each area to be dredged in length and width.

b) List the cubic yards in each location. 

c) The distance between locations.

d) Can the dredge float between locations or must it be transported over land?

12) Is there an area at the site to store pipe and support equipment? 

a) List size.

13) Is there an area available, to set up a large crane [100 to 500 ton] needed to launch the dredge? 

a) List the size of this area.

14) Can the dredge work 24/7? 

a) If not, when can it work?

15) Are there any limitations on the flow rate from the dredge? 

a) If yes, what are they?

16) What is the time period to complete the work?  This should be the time from a notice to proceed until the project must be completed.  This information will help determine the size of the dredge that is required.

17) A description of the material, including the percent of each type.  Suggested terms are, boulders, cobbles, gravel, course sand, medium sand, fine sand, stiff clay, medium clay, soft clay, dense mud and soft mud.  Other descriptive terms can be: window putty, peanut butter, catsup.

a) If dredging is in a water treatment settling pond, list the type of material, lime sludge, sewerage sludge, ferric chloride, paper sludge etc.

i)        Is the sludge primary sludge or secondary sludge?

18) Are blow counts available? 

a) If yes, provide the blow count log sheets.

19) Has a grain size analysis been made? 

a) If yes, provide the grain size log sheets.

20) Is the material hazardous? 

a) If yes, describe. 

21) Will dewatering be required?

a) What type of de-watering will be used?

22) Will personal protective gear be required? 

a) If yes, at what level? 

23) Will OSHA training be required? 

a) If yes, at what level?

24) Provide a phone number where you can be reached.

25) So the site can be viewed with satellite imagery, provide the following:

a) A street address that is close to the side and explain where the site is from the address.

b) The latitude and longitude of the site in decimal format. 

Dredging 101

What Engineers Need To Know