Information for File # RMM

Transcription

1 Information for File # 3-4-RMM Applicant:, L.P. Corps Contact: Ryan Malterud Address: 8 Fifth Street East, St. Paul, Minnesota 56 Ryan.M.Malterud@usace.army.mil Phone: (65) Primary County: Rice Section: 7 Township: 9 North Range: 6 West Information Complete On: December, 3 Posting Expires On: January, 4 Authorization Type: LOP-5-MN This application is being reviewed in accordance with the practices for documenting Corps jurisdiction under Sections 9 & of the Rivers and Harbor Act of 899 and Section 44 of the Clean Water Act identified in Regulatory Guidance Letter 7-. We have made a preliminary determination that the aquatic resources that would be impacted by the proposed project are regulated by the Corps of Engineers under Section 44 of the Clean Water Act. Our jurisdictional review and final jurisdictional determination could result in modifications to the scope of the project s regulated waterbody/wetland impacts and compensatory mitigation requirements identified above. Any approved jurisdictional determination made prior to reaching a permit decision will be posted on the St. Paul District web page at Project Description and Purpose (As stated by the applicant): The applicant is proposing to utilize grading, rip rap, and vegetation along approximately,5 linear feet of the Minnesota River to prevent erosional migration of the river towards a buried gas pipeline. Currently, the top of the riverbank is 5 feet from the pipeline and without bank stabilization the migration is expected to continue, eventually exposing the pipeline.

2 On the eastern side of the project, approximately.57 acre of types,, 4, and 6 wetlands will be permanently impacted by grading and riprap placement. On the western side of the project approximately.87 acre of type wetland will also be altered by grading and riprap. The access road to the river bank will follow an existing gravel access road to avoid disturbing vegetation and soils in the project area. Name, Area and Types of Waters (Including Wetlands) Subject to Loss: The applicant has proposed to place rip rap along,5 linear feet of the Minnesota River and to discharge fill material into.66 acre of wetlands comprised of a mosaic of flood plain forest, fresh (wet) meadow, and shrub carr wetland plant communities. Compensatory Mitigation: The applicant is proposing to replace the.66 acre of impact by purchasing compensatory credits from a Corps-approved bank within the same bank service area at a : ratio (.3 credits). Drawings: Pages through

3 June 7, 3 BEMIDJI GRAND RAPIDS FARGO DULUTH MINNESOTA MINNEAPOLIS ST PAUL ROCHESTER FLOW LOCATION MAP - MINNESOTA NTS TH ST 69 LOCATION MAP NTS CO RD 3 SEVEN MILE CREEK PARK 69 TOWNSHIP RD 4 468TH ST TOWN RD 47 INDEX: 6/7/3 9% SUBMITTAL 4 486TH ST BELGRADE TOWNSHIP 7 TIMBER LN CO HWY /7/3 38TH LN 48TH ST 3RD AVE CO RD VICINITY MAP NTS 34 CO RD 49TH ST WITA LAKE MANKATO REGIONAL AIRPORT EAGLE LAKE REG.. TITLE & INDEX. EXISTING CONDITIONS 3. SITE PLAN 4. PROPOSED CONDITIONS 5. PROPOSED CONDITIONS 6. PROPOSED CONDITIONS 7. PROPOSED CONDITIONS 8. CROSS SECTIONS 9. PLANTING PLAN. TYPICAL SECTIONS. SEDIMENT CONTROL DETAILS. SURFACE FABRIC DETAILS DRAFT Title Sheet & Sheet Index OF

4 CP 68+ M IN NE 75 SO TA RI VE R CP CP CP CP CP LEGEND ABANDONED KINDER MORGAN PIPELINE KINDER MORGAN PIPELINE ALLIANCE PIPELINE PIPE APPROXIMATE LOW FLOW WATER EDGE EW DISTURBANCE LIMITS 8+ CONTROL POINT FT CONTOURS 8 Description Easting + Northing 78 Elevation Point Name + 77 Point # + 76 Control Point Table ALE "=5' 6/7/3 9% SUBMITTAL 6/7/ REG. T F A R D Existing Conditions OF

5 PLAN LEGEND GRAVEL CONSTRUCTION ENTRANCE CONTROL POINT DISTURBANCE LIMITS FT CONTOURS..8 STAGING AREA ACCESS ROAD NORTH STAGING AREA KINDER MORGAN PIPELINE ALLIANCE PIPELINE PIPE SOUTH STAGING AREA ABANDONED KINDER MORGAN PIPELINE SILT CURTAIN APPROXIMATE LOW FLOW WATER EDGE EW SILT FENCE 4 8 ALE "=4' 76 SUGGESTED CONSTRUCTION SEQUENCING SILT FENCE 74. INSTALL SILT CURTAIN IN RIVER..3 EXCAVATE AND STOCKPILE TOPSOIL IN THE BANK EXCAVATION AREA FOR REUSE..3 CP.7.4 GRADE AND INSTALL TREATMENTS ON SLOPE ABOVE RIPRAP EXTENTS..7 RESTORE REMAINING DISTURBED AREAS..8 REMOVE GRAVEL CONSTRUCTION ENTRANCE PLACE RIPRAP TO THICKNESS SHOWN ON TYPICAL DETAILS. CP..5 EXCAVATE BANK SOIL FROM BANK EXCAVATION AREAS AS SHOWN IN CROSS SECTIONS. HAUL TO OFFSITE LOCATION. SILT CURTAIN.6.4 CP CP CP /7/3 9% SUBMITTAL 6/7/ CP Description 76 Easting 76 Northing 4 Elevation 75 Point Name 75 Control Point Table Point # 8 INSTALL GRAVEL CONSTRUCTION ENTRANCE. 75. REG. T F A R D Site Plan 3 OF

6 CP CP 5 CP3 REMOVE PORTION OF ABANDONED PIPE WHERE EXCAVATION IS PROPOSED 6 7 PLAN LEGEND CONTROL POINT DISTURBANCE LIMITS EXISTING FT CONTOURS PROPOSED FT CONTOURS ACCESS ROAD RIPRAP SILT CURTAIN 6/7/3 9% SUBMITTAL EW KINDER MORGAN PIPELINE ABANDONED KINDER MORGAN PIPELINE ALLIANCE PIPELINE PIPE APPROXIMATE LOW FLOW WATER EDGE ALE "=' 6/7/ REG. Proposed Conditions DRAFT 4 OF

7 EXCAVATE FLAT AREA TO ELEV PLACE LAUNCHABLE RIPRAP TO ELEV. 744 AS SHOWN IN DETAIL PLAN LEGEND EXISTING FT CONTOURS PROPOSED FT CONTOURS DISTURBANCE LIMITS RIPRAP 6/7/3 9% SUBMITTAL EW APPROXIMATE LOW FLOW WATER EDGE KINDER MORGAN PIPELINE ABANDONED KINDER MORGAN PIPELINE 3 6 ALE "=3' 6/7/3 SILT CURTAIN REG. 6 MATCHLINE Proposed Conditions DRAFT 5 OF

8 REMOVE PORTION OF ABANDONED PIPE WHERE EXCAVATION IS PROPOSED 5 MATCHLINE EXCAVATE FLAT AREA TO ELEV PLACE LAUNCHABLE RIPRAP TO ELEV. 744 AS SHOWN IN DETAIL PLAN LEGEND EXISTING FT CONTOURS PROPOSED FT CONTOURS DISTURBANCE LIMITS RIPRAP 6/7/3 9% SUBMITTAL EW APPROXIMATE LOW FLOW WATER EDGE KINDER MORGAN PIPELINE ABANDONED KINDER MORGAN PIPELINE 3 6 ALE "=3' 6/7/3 SILT CURTAIN REG. 7 MATCHLINE Proposed Conditions DRAFT 6 OF

9 EXCAVATE FLAT AREA TO ELEV PLACE LAUNCHABLE RIPRAP TO ELEV. 744 AS SHOWN IN DETAIL 7 MATCHLINE WHERE BEDROCK IS ENCOUNTERED AT ELEVATIONS AT OR HIGHER THAN ELEV. 739, DO NOT EXCAVATE FLAT AREA AND DO NOT PLACE LAUNCHABLE STONE PLAN LEGEND EXISTING FT CONTOURS PROPOSED FT CONTOURS DISTURBANCE LIMITS RIPRAP 6/7/3 9% SUBMITTAL EW APPROXIMATE LOW FLOW WATER EDGE KINDER MORGAN PIPELINE ABANDONED KINDER MORGAN PIPELINE 3 6 ALE "=3' 6/7/3 SILT CURTAIN CONTROL POINT REG. Proposed Conditions DRAFT 7 OF

10 76 75 STA: ELEV:739. STA: ELEV:744. STA:4+9.7 ELEV:744. STA: ELEV:75. STA: ELEV: STA:+4.8 ELEV:739. STA:+5.83 ELEV:744. STA:+7.44 ELEV:744. STA: ELEV:75. STA:+9.8 ELEV:75. STA:+.45 ELEV: CROSS SECTION STATION /7/3 9% SUBMITTAL STA:+9.53 ELEV:739. CROSS SECTION STATION STA:+3.6 ELEV:744. STA:+.33 ELEV:744. STA:+39.6 ELEV:75. STA:+4.63 ELEV:75. STA: ELEV: CROSS SECTION STATION CROSS SECTION 8 STATION 7+5 Cross SectionsDRAFT 6/7/ OF REG. STA:+43.4 ELEV:739. STA: ELEV:744. STA: ELEV:744. STA:+9.77 ELEV:75. STA:+9.78 ELEV: STA:+.6 ELEV:

11 CP CP3 CP Control Point Table Point # Point Name Elevation Northing Easting Description CP CP CP PLAN LEGEND 6/7/3 9% SUBMITTAL CONTROL POINT EXISTING FT CONTOURS PROPOSED FT CONTOURS DISTURBANCE LIMITS PLANTING ZONE PLANTING ZONE EW ALE "=' ACCESS ROAD KINDER MORGAN PIPELINE ABANDONED KINDER MORGAN PIPELINE ALLIANCE PIPELINE PIPE APPROXIMATE LOW FLOW WATER EDGE SILT CURTAIN 6/7/ REG. Planting PlanDRAFT 9 OF

12 EXISTING BANK STAKES 3FT OC SURFACE FABRIC SEE AND SPECIFICATIONS RIPRAP, 8 IN. THICK LAUNCHABLE STONE ELEV. = 75 FT GRANULAR FILTER MATERIAL, 6 IN. THICK MEDIAN WATER SURFACE ELEVATION DURING CONSTRUCTION SEASON 5 FT GRADE BANK AT 3: SLOPE UP FROM ELEV. 75 FT TO EXISTING GRADE. PLACE FABRIC, SEED AND PLANT ACCORDING TO PLANTING PLAN. ELEV. = 739 FT FT TYPICAL SECTION LAUNCHABLE STONE NOT TO ALE SURFACE FABRIC NATIVE BANK MATERIAL STAKES 3 FT OC FINE FILTER AGGREGATE, 4 IN. THICK EXISTING BANK ELEV. = 75 FT GRADE BANK AT 3: SLOPE UP FROM ELEV. 75 FT TO EXISTING GRADE. PLACE FABRIC, SEED AND PLANT ACCORDING TO PLANTING PLAN. ELEV. VARIES EXISTING BEDROCK 6/7/3 9% SUBMITTAL 6/7/ TYPICAL SECTION RIPRAP OVER BEDROCK NOT TO ALE Typical SectionsDRAFT OF REG.

13 FILTER FABRIC MATERIAL 36" WIDE ROLLS ANGLE BOTH ENDS OF FILTER FABRIC FENCE TO ASSURE SOIL IS TRAPPED.5 FT 4 FT.5 FT 6 IN 6FT MIN. SPACING INTERLOCK "X" POSTS AND ATTACH 5 FT VEGETATED BUFFER TOP OF BANK FRONT VIEW NOT TO ALE FILTER FABRIC MATERIAL USE STITCHED LOOPS OVER "X" POSTS PLAN VIEW NOT TO ALE CARRIER FLOAT STEEL TENSION CABLE STEEL TENSION CABLE AND CARRIER FLOAT.5 FT 4 FT ANCHOR CABLE ANCHOR FT - FT CURTAIN DEPTH FT - FT CURTAIN DEPTH 6 IN MAX. FT SIDE VIEW NOT TO ALE VARIABLE LENGTH CURTAIN FABRIC SECTION VIEW NOT TO ALE CURTAIN WEIGHT MAX. FT MAX. FT ELEVATION VIEW NOT TO ALE SILT FENCE NOTES TYPICAL DETAIL SILT FENCE.THE FILTER FABRIC SHALL BE PURCHASED IN A CONTINUOUS ROLL CUT TO THE LENGTH OF THE BARRIER TO AVOID USE OF JOINTS. WHEN JOINTS ARE NECESSARY, FILTER CLOTH SHALL BE SPLICED TOGETHER ONLY AT A SUPPORT POST, WITH A MINIMUM 6 INCH OVERLAP, AND BOTH ENDS SECURELY FASTENED TO THE POST. ALTERNATIVELY, OVERLAP AND INTERLOCK TWO POSTS WITH ATTACHED FABRIC AS BY THE OWNER'S REPRESENTATIVE..THE SILT FENCE IS TO BE INSTALLED AT LOCATIONS SHOWN ON THE PLAN ALONG THE DOWNHILL PERIMETER OF DISTURBED AREAS. THE FENCE POST SHALL BE SPACED A MAXIMUM OF 6 FEET APART AND DRIVEN SECURELY INTO THE GROUND A MINIMUM OF 4 INCHES APART. 3. THE FILTER FABRIC SHALL HAVE A MINIMUM VERTICAL BURIAL OF 6 INCHES. ALL EXCAVATED MATERIAL FROM SILT FENCE INSTALLATION SHALL BE BACK-FILLED AND COMPACTED ALONG THE ENTIRE DISTURBED AREA. NOT TO ALE WHEEL WASH AREA SILT FENCE TYPICAL DETAIL FLOTATION SILT CURTAIN NOT TO ALE GRAVEL CONSTRUCTION ENTRANCE MIN 8 IN. DEPTH COMPACTED AGGREGATE BASE SUBGRADE STABILIZATION GEO-TEXTILE RAMP - FULL WIDTH OF ENTRY STD. CURB GAP FOR DRAINAGE WOODEN RAMP (S"X4", "X8", "X") PAVED STREET 6/7/3 9% SUBMITTAL 4. STANDARD OR HEAVY DUTY SILT FENCE SHALL HAVE MANUFACTURED STITCHED LOOPS FOR INCHES X INCHES POST INSTALLATION. 5. SILT FENCES SHALL BE REMOVED WHEN THEY HAVE SERVED THEIR USEFUL PURPOSE, BUT NOT BEFORE THE UPSLOPE AREA HAS BEEN PERMANENTLY PROTECTED AND STABILIZED, OR AS DIRECTED BY THE OWNER'S REPRESENTATIVE. 6/7/ STD. CURB REG. FT MIN. WIDTH 3 GRAVEL CONSTRUCTION ENTRANCE NOT TO ALE Sediment Control Details DRAFT OF

14 FABRIC FOLD STAKES STAKES 3 FT OC IN STAGGERED ROWS STAKES THROUGH BOTTOM FABRIC LAYER STAPLES 8 IN OC IN STAGGERED ROWS FT MIN MAX. ANGLE 5 ALL FABRIC FORMS WILL BE LAPPED IN AN UPSTREAM TO DOWNSTREAM DIRECTION DOWNSTREAM FABRIC LAYER LAPS UNDER A A' STAPLES 8 IN OC IN STAGGERED ROWS B UPSTREAM FABRIC LAYER LAPS OVER BY 3 FT MIN. B' FT CONSTRUCTION FORM FLOW TYPICAL DETAIL FOLDING OF OUTER FABRIC NOT TO ALE FT MIN. FILL KEY TRENCH WITH TOPSOIL AND COMPACT OVER COIR FABRIC FT FLOW SECTION A - A' FABRIC FOLD NOT TO ALE CONSTRUCTION FORM FLOW TYPICAL DETAIL FABRIC JOINING NOT TO ALE UPSTREAM FABRIC LAYER LAPS OVER INNER FABRIC TO BE BUTTED TOGETHER STAKE THROUGH BOTTOM FABRIC LAYER FLOW 3 FT MIN. OVERLAP SECTION B - B' FABRIC JOINING NOT TO ALE DOWNSTREAM FABRIC LAYER LAPS UNDER STAKES THOUGH BOTH FABRIC LAYERS X 4 STUD CUT TO 8" LONG FINISHED STAKES LEG WIDTH.6" TAPERED TO POINT STAPLE THICKNESS.4" FT MIN. 3 WOODEN STAKES ON 3 FT CENTERS NATIVE SEED MIX FILL OR NATIVE SOIL WOODEN STAKE AND STAPLES FABRICATING DETAIL NOT TO ALE WOVEN (OUTER) COIR FABRIC NON-WOVEN (INNER) COIR FABRIC EDGE OF FABRIC 4" MIN FROM STAKE 4 KEY TRENCH DETAIL TERMINATION TRENCH NOT TO ALE STAKE FABRIC TO BOTTOM OF KEY TRENCH EVERY 3 L.FT GENERAL NOTES ON SECURING COIR FABRIC. SECURE THE OUTER FABRIC (WOVEN, WHERE APPLICABLE), WITH A WOODEN STAKE THROUGH THE FABRIC ON 3 FT CENTERS (SEE DETAIL VIEWS & ) NOTE: THE HOLES FOR STAKES SHALL NOT BE PRECUT. ALLOW THE STAKE TO BREAK THE MINIMUM NUMBER OF STRANDS AS IT IS BEING DRIVEN IN. DRIVE STAKES SO THAT " TO 3" OF THE TOP OF THE STAKE IS LEFT EXPOSED.. OUTER FABRIC ENDS SHALL BE JOINED BY LAPPING THE UPSTREAM PIECE OF FABRIC OVER THE DOWNSTREAM PIECE AS SHOWN IN DETAIL B-B. OVERLAPS SHALL BE A MINIMUM OF 3 FT, INNER FABRIC ENDS SHALL BE BUTTED TOGETHER, NOT OVERLAPPED. 3. STAKING SPACING IS DEFINED IN SPECIFICATIONS SURFACE FABRIC. 6/7/3 9% SUBMITTAL 5 TOE DETAIL BIODEGRADABLE FABRICS AND STAKES NOT TO ALE 6/7/ REG. Surface Fabric Details DRAFT OF