Table 2. Current Measurements and Locations

Table 2

Current Measurements and Locations

River

Velocity

Easting

Northing

Stage

Date

Time

Max, ft/s

Avg, ft/s

ft MLG

Comments

5 June

1300

7.0

6.1

5.0

6 June

7 June

8 June

0850

3.0

5.4

1700

4.2

5.6

9 June

0800

3.9

3.0

5.5

1539

5.1

3.9

243276

3944105

5.5

Taken from

stationary

dredge/survey

configuration from

CL of channel

prism #2

10 June

1035

5.0

3.5

243921

3944055

5.9

CL of channel off

gantry

1025

4.0

3.4

243925

3943751

5.9

Range 300 of stbd

bow (approx due

west from CL

reading off gantry)

1445

6.1

5.3

244185

3943971

5.5

Range 88,

Sta 49+97

11 June

0720

3.5

2.7

244730

3943227

5.5

Off gantry

1641

6.3

5.3

243435

3944100

5.3

Off gantry

12 June

0745

2.8

2.4

243257

3943883

5.3

Off gantry

13 June

0645

3.7

3.1

243528

3943775

5.4

Off gantry

MLG (x = 3,943,667 y = 248,228). BD sample 2 from Reach 2 (BD02) was also

collected on 5 June 2003 from Station 51+50 at -47 MLG (x = 3,944,058

y = 244,041). Both BD01 and BD02 were classified as a silty sand (American

Association of State Highway and Transportation Officials) with median grain

sizes of 0.0752 mm and 0.157 mm, respectively. The AD sample 1 from Reach 1

(AD01) was collected 8 June 2003 from the CL Sta 9+00 at -50 ft MLG (x =

3,943,674 y = 248,213). AD sample 2 from Reach 2 (AD02) was collected on

14 June 2003 from Sta 51+50 (x = 3,944,060 y = 244,041) (no depth recorded).

AD01 and AD02 were also classified as silty sand with median grain sizes of

0.108 mm and 0.100 mm, respectively.

Placement Area Data

BD and AD placement site surveys were conducted by the contractor's sur-

vey crew and inspected by MVN, using airboats, mobile DGPS for horizontal

positioning, and spirit leveling for vertical control. Cross sections were extended

over the anticipated limits of material placement at 100-ft intervals centered on

the discharge location. All cross sections were oriented (tied) normal to the

baseline with readings taken at least every 20 ft along the cross section and

adjusted to the nearest 0.1 ft. Data were furnished to the USACE in a structured

ASCII format on magnetic media.

Chapter 3

Data Collection Program