Locating Your Trail Bridge for Longevity
Appendix D—Hydraulic Structure Initial Site Examination Form
| HYDRAULIC STRUCTURE INITIAL SITE EXAMINATION FORM (DATA SHEET FOR FORDS, BRIDGES, AND CULVERTS) (INCLUDE SITE SURVEY, LONGITUDINAL PROFILE, AND CROSS-SECTIONS) |
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| FOREST: | ROAD (TRAIL) NAME: | ||
| STRUCTURE NAME: | STREAM NAME: | ||
| STRUCTURE NUMBER: | LOCATION: | ||
| SECTION: | TOWNSHIP: | RANGE: | |
| A. HYDROLOGIC & HYDRAULIC DATA | |||
| 1. SHOW DRAINAGE AREA ON A 15 MINUTE TOPOGRAPHIC MAP | 2. NAME OF CLOSEST GAGING STATION and DISTANCE IN MILES: | ||
| 3A. MANNING'S ROUGHNESS COEFFICIENT (N): | 3B. AVERAGE STREAMBED SLOPE: | ||
| 500' UPSTREAM: | 500' DOWNSTREAM: | ||
| 4. DESCRIBE CHARACTER OF STREAM BED MATERIAL AND STREAM BANKS WITHIN THE 1000-FOOT AREA: |
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| 5A. AMOUNT OF DEBRIS IN CHANNEL: | 5B. TYPE OF DEBRIS: | ||
| 6. WATER ELEVATONS: | |||
| 6A. DATE AND FLOW DEPTH AT TIME OF SURVEY: | 6B. EST. BASE FLOW DEPTH OCCURS "MONTH": | 6C. EST. EXTREME HIGH WATER DEPTH (HOW DETERMINED?): | |
| 6D. CAUSE AND SEASON OF FLOODS: |
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| B. OTHER CHANNEL CHARACTERISTICS | |||
| 1. NOTE EVIDENCE OF INSTABILITY OF BANKS OR SCOUR: | |||
| 2A. STRAIGHT CHANNEL, OR NOTE DEGREE OF SINUOUSITY: |
2B. HIGH FLOW ANGLE OF APPROACH (PARALLEL OR IMPINGING?): | ||
| 3. CHANNEL STABILITY (AGGRADATION, DOWNCUTTING, LATERAL CHANNEL MIGRATION, ETC): | |||
| 4. CHANNEL CLASSIFICATION (ROSGEN OR OTHER): | |||
| 5. CHANNEL ENTRENCHMENT (RATIO = FLOOD-PRONE/BANKFULL WIDTH): | |||
| 6. UPSTREAM/DOWNSTREAM STRUCTURES AFFECTING SITE (DAMS, BRIDGES, ETC.): | |||
| 7. OTHER SITE ASSESSMENT FACTORS: | |||
| C. FOUNDATION CONDITIONS | |||
| 1. CHARACTER OF SURFACE OR LOCAL MATERIALS: | |||
| 2. ESTIMATED DEPTH TO BEDROCK FEET: | 2A. BEDROCK TYPE & CONDITION: | ||
| 3. ANY SPECIAL FOUNDATION CONDITIONS? INVESTIGATION NEEDED? EXPLAIN: |
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| D. EXISTING STRUCTURE | |||
| 1. TYPE OF EXISTING STRUCTURE: | 1A. NO & LENGTH OF SPANS: |
1B. TYPE OF CULVERT: | 1C. SIZE: |
| 2. WATERWAY OPENING (FEET WIDE OR SQUARE FEET): |
2A. WATERWAY ADEQUATE? Yes/No | ||
| 3. STRUCTURE AFFECTED BY: Debris/Ice/Damage/Scour | 4. DOES STRUCTURE CONSTRICT THE NATURAL CHANNEL: Yes/No | ||
| 5. CONDITION OF EXISTING STRUCTURE: | |||
| E. PROPOSED STRUCTURE | |||
| 1. BRIDGE OR LOW-WATER CROSSING TYPE: | 1A. LOADING (JUSTIFY IF OTHER THEN HS 20): | ||
| 1B. WIDTH: | 1C. SUBSTRUCTURE OR SPECIAL NEEDS: | ||
| 2. TYPE OF CULVERT: | 2A. SIZE: | ||
| 2B. CULVERT DESIGN ISSUES? | |||
| 2C. CORROSION OR ABRASION CONCERNS? | 2D. TYPE OF FILL MATERIAL TO BE USED: | ||
| F. MISCELLANEOUS DATA | |||
| 1. TIME AND DURATION OF CONSTRUCTION SEASON: |
2. RIPRAP IS AVAILABLE: Yes/No | 2A. DISTANCE FROM SITE: Yes/No | |
| 2B. DESCRIPTION OF RIPRAP MATERIAL: |
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| 3. TRAFFIC CONTROL AND SAFETY NEEDS: |
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| 4. ROADWAY ALIGNMENT AND GRADE (ADEQUATE?): | |||
| 5. CHANNEL OR STRUCTURE ALIGNMENT CHANGES RECOMMENDED (SHOW ON COPY OF SITE PLAN): |
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| 6. ARE DIKES OR BANK PROTECTION REQUIRED TO CONTROL FLOW (SHOW ON COPY OF SITE PLAN): |
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| 7. DESCRIPTION OF ON-SITE CONSTRUCTION MATERIAL TO BE USED: |
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| 8. STORAGE AND/OR WASTE AREAS AVAILABLE FOR CONSTRUCTION (LOCATION, SIZE, AND DESCRIPTION): |
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| 9. WHAT IS THE MAXIMUM LENGTH (FEET) OF GIRDERS THAT CAN BE HAULED TO THE SITE? | |||
| 10. METHOD OF CONSTRUCTION: Contract/Force Account/Timber Purchaser | |||
| 11. OTHER REMARKS AND SPECIAL RECOMMENDATIONS: |
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| G. FISH AND OTHER WILDLIFE PASSAGE CONSIDERATIONS | |||
| 1A. IS FISH PASSAGE REQUIRED? Yes/No | 1B. IF YES, WHAT SPECIES AND LIFE STAGES? | 2. IS PASSAGE FOR OTHER SPECIES REQUIRED? (TERRESTRIAL, CRAWLING, SWIMMING) Yes/No/Which? | |
| 3. SPECIAL/IMPORTANT CONSIDERATIONS FOR HABITAT PROTECTION? | |||
| 4. FOREST BIOLOGIST RECOMMENDATIONS: |
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| PREPARED BY: |
DATE: | FOREST ENGINEER REVIEW: | DATE: |
| FIELD SITE SKETCH, LONGITUDINAL PROFILE, AND CROSS-SECTIONS |
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