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Shoreline and River Bank Protection

SHORELINE AND RIVER BANK PROTECTION 


A.  RESOURCE PROBLEMS AND OPPORTUNITIES .... 4-1
  1.  Pre-Inundation Conditions  4-1
  2.  Resource Problems . 4-1
  3.  Resource Opportunities . 4-2
  4.  HREP Objectives  ... 4-3

B.  MANAGEMENT ACTION . 4-4
  1.  Site Identification ... 4-7
  2.  Shoreline Stabilization Technique Selection .. 4-10
  3.  Cost .... 4-11

C.  SHORELINE STABILIZATION TECHNIQUE DESIGN DETAILS .... 4-12
  1.  Rock Revetments .. 4-12
  2.  Rock Groins  4-14
  3.  Rock Vanes . 4-17
  4.  Offshore Rock Mounds .. 4-21
  5.  Rock-Log Structures .... 4-22
  6.  Berms and Vegetation . 4-24

D.  PLANS AND SPECIFICATIONS ... 4-26
  1.  Surveys .. 4-26
  2.  Plans .. 4-26
  3.  Quantities .... 4-27

E.  ROCK SIZING AND DESIGN CONSIDERATIONS .. 4-27
  1.  Gradation and Thickness  4-28
  2.  St. Paul... 4-28
  3.  Rock Island . 4-28
  4.  St. Louis . 4-28



Chapter 4 

CASE STUDIES
Case Study 1  Rock Revetment - Lake Onalaska, Mississippi River Pool 7 .. 4-14
Case Study 2  Rock Revetment - Polander Lake, Stage I, Mississippi River Pool 5a .. 4-14
Case Study 3  Rock Revetment - Pool 8, Mississippi River Phase I .... 4-14
Case Study 4  Rock Groins - Weaver Bottoms, Mississippi River, Pool 5 .... 4-17
Case Study 5  Rock Groins - Trempealeau National Wildlife Refuge, Mississippi River, Pool 6 .... 4-17
Case Study 6  Rock Groins - Pool 8, Mississippi River Phase I . 4-17
Case Study 7  Rock Vanes - Lost Island Chute, Mississippi River Pool 5 4-20
Case Study 8  Rock Vanes - Spring Lake Islands, Mississippi River Pool 5 . 4-20
Case Study 9  Offshore Rock Mound - Weaver Bottoms, Mississippi River Pool 5 .... 4-22
Case Study 10  Offshore Rock Mound - Polander Lake, Mississippi River Pool 5a . 4-22
Case Study 11  Rock-Log Structure - Rosebud Island, Mississippi River Pool 7 ... 4-24
Case Study 12  Berms – Boomerang Island, Phase I, Mississippi River Pool 8  4-25
Case Study13  Large Woody Debris - Spring Lake Islands, Mississippi River Pool 5 .. 4-26

Photograph 4-1  Degradation at Spring Lake, Pool 5 .... 4-2
Photograph 4-2  Riprap and Geotextile Filter Placed on Sand (Lake Onalaska) . 4-4
Photograph 4-3  Bio-Geo Stabilization with Groins and Willows (Boomerang Island)  4-5
Photograph 4-4  Vanes .... 4-5
Photograph 4-5  Vegetative Stabilization (Boomerang Island) ... 4-5
Photograph 4-6  Bankline Erosion at Huron Island, Pool 18 .. 4-7
Photograph 4-7  Bankline Erosion on Long Island Division, Pool 20 .. 4-7
Photograph 4-8  Long Island Bankline Prior to Rock Placement ... 4-12
Photograph 4-9  Placement of Rock Revetment at Long Island  4-12
Photograph 4-10  Area of Rock Placement at Long Island 8 Years Post Construction . 4-13
Photograph 4-11  Newly Constructed Rock Groin in Pool 8 .. 4-15
Photograph 4-12  Constructed Rock Groin in Pool 8 After a Few Years of Vegetation Growth . 4-15
Photograph 4-13  Rock Vanes at Lost Island Chute, Pool 5 ... 4-18
Photograph 4-14  J-Hook Vane in Pool 8  4-20
Photograph 4-15  Offshore Rock Mound at Peterson Lake in Pool 4 ... 4-21
Photograph 4-16  Installation of a Rock log Structure ... 4-23
Photograph 4-17  Rock-log Structure in Place ... 4-23
Photograph 4-18  Pool 5, Weaver Bottoms, Swan Island .. 4-24

Chapter 4 

TABLES
Table 4-1  Description of Shoreline Stabilization Techniques .. 4-6
Table 4-2  Erosion Stabilization Assessment Worksheet – Shoreline or River Bank Reach  4-9
Table 4-3  Example Shoreline Stabilization Technique Distribution .... 4-10
Table 4-4  General Guidance for Stabilization Technique Selection .... 4-10
Table 4-5  Cost of Willow Plantings on Two Island Projects . 4-11
Table 4-6  Typical Rock Revetment Design Criteria  4-13
Table 4-7  Typical Rock Groin Design Criteria ... 4-15
Table 4-8  Typical Vane Design Criteria .. 4-20
Table 4-9  Typical Offshore Rock Mound Design Criteria  4-22
Table 4-10  Typical Rock-log Structure Design Guidance .. 4-23
Table 4-11  Berm Design Criteria .... 4-24
Table 4-12  Typical Large Woody Debris Design Criteria .. 4-26
Table 4-13  St. Paul District Rock Gradations Used on HREP Projects.  4-28
Table 4-14  St. Louis District Bedding Material Gradation . 4-28
Table 4-15  St. Louis District Graded Stone B Gradation .... 4-29
Table 4-16  St. Louis District Graded Stone
 Gradation ... 4-29
Table 4-17  Other Design Considerations for Rock .... 4-30

FIGURES
Figure 4-1  Rock-based Shoreline Stabilization Costs per Foot of Shoreline ... 4-11
Figure 4-2  Rock Revetment Design Detail .... 4-13
Figure 4-3  Rock Groin Design Detail .. 4-16
Figure 4-4  Plan View of a Vane Alignment .. 4-18
Figure 4-5  Typical Detail of a Rock Vane  4-19
Figure 4-6  Plan View of a J-Hook Vane ... 4-19
Figure 4-7  Offshore Rock Mound Design Detail . 4-21
Figure 4-8  Design Detail of Large Woody Debris  4-25
Figure 4-9  Design Detail of Large Woody Debris Anchorage  4-26
Figure 4-10  Typical Rock Protection Section .. 4-27

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I am Thomas Britto here to share my experiences in the civil engineering field to all my readers.Today many students are struggling to buy books at high prices. So I decided to start a blog and share my experience and knowledge with all my readers.


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