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HomeMy WebLinkAboutPolk Co. - DamsNCDENR North Carolina Department of Environment and Natural Resources :. Division of Land Resources James D. Simons, PG, PE Director and State Geologist March 23, 2011 BYANA, LLC Attn: Mr. Brian Carroll 467 Lake Sandy Plains Road Tryon, North Carolina 28782 RE: Approval to Repair Derbyshire Dam Polk County State ID: POLK-008 Dear Mr. Carroll: Beverly Eaves Perdue, Governor Dee Freeman Secretar Certificate of Approval, D f MAR 2 9 2011 i •�. WATER QUALITY SECTION ASHFVI1;LC REGIONAL OFFICE 5 This is in response to your submission dated January 28, 2011, and received on January 31, 2011, of plans, specifications, and design data for repair of the subject dam in compliance with the Dam Safety Law of 1967. This dam is of high hazard classification. The plans, specifications, and design data submitted were prepared under, the supervision of Mr. David Odom, PE. This letter constitutes approval of the proposal to repair the subject dam according to the plans and specifications received by -this Division on January 31, 2011, with the following stipulations: 1. Project construction shall be supervised by Mr. David Odom, PE. Mr. David Odom, PE, shall be responsible for field observation of construction as necessary to ensure compliance with approved plans. 2. During construction, the Division of Land Resources may require such progress reports as are deemed necessary. . 3. In accordance with GS 143-215.29 and NCAC 15A-2K .0203, .0212, .0215, and .0216, within 30 days of completion of the project, Mr. David Odom, PE, shall inspect the. completed work and upon finding that the work has been done,as specified and the, dam is safe, shall file with the Division of Land Resources two sets of record drawings and a certificate stating that the work _has been completed in accordance with approved plans, -specifications and other requi merits. Geological Survey - Land Quality • Geodetic Survey Division of Land Resources - 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina 27604 Telephone 919-733-3833 / FAX: 919-715-8801 • Internet: http://www.dlr.enr.state.nc.usAndex.html BYANA, LLC Derbyshire Dam Approval to' Repair POLK-008 March 23, 2011 Page 2 of 2 4. No water shall be iml punded behind the dam until final approval for operation of this dam is issued by the Division of Land Resources. Also, draining of the lake shall be performed in such a manner as to preclude off -site sedimentation. 5, An emergency action -plan (EAP) and an operation and maintenance (O&M) plan are required, for all, high hazard dams. The O&M plan should address routine maintenance, frequency of, inspections by the owner or the owner's representative, and annual operation of the bottom drain to ensure that it is functional. It is strongly recommended that the EAP be submitted prior to commencing repairs to address problems that may arise during construction. Nevertheless, both the EAP and O&M plan must be received prior to issuance of an approval to impound. 6. You must notify Ms. Janet Boyer, PE, Acting Regional Engineer, Land Quality Section, 2090 U.S. Highway 70, Swannanoa, North Carolina 28778, telephone number (828) 296- 4500 ten days before the start of construction. The Army Corps of Engineers 'and the Water Quality Section of this Department should be contacted to determine if additional permits are required. Also, the erosion and sediment control program having jurisdiction should be contacted to determine permit requirements. In_ any case, sediment must be prevented from entering the waters of the state or flowing onto neighboring property. Construction of the repairs must begin within one year of the date of this letter or this approval is void. For assistance you may contact the Asheville Regional Office at (828) 296-4500 or a staff member of the Dam Safety Program in the Raleigh Central Office at telephone number (919) 733-4574. Sincerely, James D. Simons, PG, PE Director and State Geologist JDS/smm/whd cc: Mr. David Odom, PE Ms. Janet Boyer, PE, Acting Regional Supervisor 'NRu�fiac W ter :r , . U. n ' eg ona = upera�is©-A NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, PG, PE Director and State Geologist July 13, 2010 Byana, LLC Attention: Mr. Brian Carroll 467 Lake Sandy Plain& Road Tryon, North Carolina 28782 RE: Derbyshire Dam Polk County State Dam ID: POLK-008 Dear Mr. Carroll: Beverly Eaves Perdue, Governor Dee Freeman, Secretary This is to acknowledge receipt of your revised application dated July 1, 2010 for the repair of the subject dam. The application was received in -our office on July 6, 2010. An additional copy of the submitted information is required before this office can process your application. Once these items are received we will proceed with a review of your application. In order for the application to retain its place in the order of reviews the above items must be received within thirty days. Applications requiring an approval to repair a dam will be reviewed by this office in the order they are received except that existing high hazard potential dams with known safety issues will be given priority. We endeavor to respond to applications within 60 days of receipt. Please contact Ms. Janet Boyer, PE, Regional Engineer, Land Quality Section, 2090 U.S.'Highway 70, Swannanoa, North Carolina 28778; telephone •number (828) 296-4500, or me at telephone number (919) 733-4574 should you have any questions concerning this matter. Sincerely, Steven M. McEvoy' State Dam Safety EnWeer Land Quality Section SMM/whd cc: Mr. David W. Odom, PE, Design Engineer Ms. Janet Boyer, PE, Land Quality Regional Engineer Surface Water. Protection Regional Supervisbr_' -- _ Filename: POLK-008_20100713_IA RECT Derbyshire ��!''�,;:'e..:jw,;:�zY�.'•ere.c��. .�:f%.w;�. _��va-c�_...sc:.`..,. '^.Ls>a"�'=y`T9;`3 :'���; t 4� D Ff JUL 2 0 2010 s. WATER QUALITY SECTION ;a.,• 1 ASHEVILLE REGIONAL OFFICE , - 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 - Telephone 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 Internet:http://www.dlr.enr.state.nc.us/pages/landqualitysection.htmi 0 r ATmA HCDENR 4, North Carolina Department of Environment and Naturaf Resources Division of Land Resources Land Quality Section James D. Simons, PG, PE Director and State Geologist February 17, 2012 Mr. David Odom, PE Odom Engineering, PLLC - 152 East Main Street Forest City, North Carolina 28043 RE: Derbyshire Dam Polk County State 'Dam ID: POLK-008 Dear Mr. Odom: Beverly Eaves Perdue, Governor Dee Freeman', Secretary, . ,•,,,0srt!'aac�:�:ire,:rfcs%r,Y::�,.:;r1a"�;�.�,r..�.»,.,_ :arti• ,.�+���`. C F : eceive FEB 24 2012 E B 2012 $' WATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE La :d Q lity ed . shevill on This concerns the subject dam recently repaired pursuant to Approval to Repair dated July 11, 2011, as required by the Dam Safety Law of 1967. Record Drawings were received on January 20, 2012. The engineer's certification was received on.January 23, 2012. The dam was certified by Mr. David Odom, PE. An inspection of this dam was made by Land Quality.Section staff of the Asheville Regional Office on January 31, 2012. Prior to granting of approval to impound, additional information or revision is requested for the following items: 1. As part of your as -built submittal, please provide a written summary and representative photographs of the work performed that is not now observable. This work includes: • Filling of the existing 24-inch principal spillway pipe with non -shrink grout. Please provide verification of the grout mixture that was used. • Installation of the seepage diaphragms on both the existing and new principal spillway conduits. • Installation of the, new toe drain. Please include in the written summary a discussion of the -aspects of final construction that differ from the approved repair plans. 2. In light of the engineer's assertion that all final elevations, topographic contours, and dimensions are identical to those on the approved• repair -plans, please clarify whether a post -construction survey of the subject dam was performed that confirms this assertion. The permanent siphons were installed differently..;than shown on the approved plans. As . installed, they discharge to an area of fill that would be highly erosive -if the siphons were activated. Please provide a design for installation of outlet protection -to serve the siphon 1612 Mail Service Center, Raleigh, North Carolina 27699-1612.- Telephone 919-707-92201 FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 - Internet: httpJfportal.nodenr.org/webArAand-quality Mr. David Odom, PE As -built Revisions Request February 17, 2012 ' Page 2 of 2 Derbyshire Dam POLK-009 outlets. The design must include adequate construction details and design calculations and be reflected. in the as -built plan drawings once installed. 4. _ The profile of the siphon installation on Sheet 6 of 7 indicates that the siphons discharge onto the downstream slope of the dam approximately 12 feet above the toe of dam on a 11 slope. Based on observations by our field staff, this is not an accurate representation of as - built conditions as the siphons discharge to a relatively flat area. Please revise all drawings as needed to accurately reflect these conditions. 5. Our field staff measured the width of the emergency spillway control section to be wider than the 26 feet indicated on the as -built plans. Please verify and reflect the as -built conditions on plan drawings. 6. During our field inspection it was discovered that the discharge pipe for the seepage diaphragm serving the new principal spillway conduit was connected to the discharge pipe serving the newly -installed toe -drain system. Please reflect this change accurately on the as - built drawings. 7. Please provide a revised engineering certification as there are at least two substantial changes from the approved repair plan. S. As stipulated on the Approval to Repair, an emergency action plan (EAP) and an operation and maintenance (O&M) plan are required. for all high hazard dams. The O&M plan should address routine maintenance, frequency of inspections by the owner or the owner's representative, and annual operation of the siphon -bottom drain to ensure that it is functional. Both an EAP and an O&M plan must be reviewed and approved prior to final approval to impound.. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised drawings, engineer's certification, and other requested information. You may contact Ms. Laura Herbert, PE, Regional Engineer at (828) 296-4500, or a member of the Dam Safety Program in the Raleigh Central Office by telephone at (919) 707-9220 for assistance concerning this matter. Sincerely, William H. Denton, IV Assistant State Dam Safety Engineer Land Quality Section cc: Mr. Brian Carroll; BYANA, LLC s Laura,Herb_..ert, PE, Land Quality Regional Engineer `N01-act rt g ot�gation Sip ry So Filename: POLK-008 20120217_AB revreq_Derbyshire �SO4 ��� NCDENR North Carolina Department of Environment and Natural Division of Land Resources Land Quality Section James D. Simons, PG, PE Be Director and State Geologist January 24, 2012 BYANA, LLC Attn: Mr. Brian Carroll 467 Lake Sandy Plains Road Tryon, North Carolina 28782 RE: Derbyshire Dam Polk County State ID: POLK-008 Dear Mr. Carroll: FE 0- 2012 irceL_ __ ___�__� VJATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE eves Feaue, Governor This is to acknowledge receipt of your "as -built" submittal and application for final approval dated , January 19, 2012 for the subject dam. The submittal was received in our office on January 20, 2012. Applications for Final Approval require a comprehensive field inspection by our Regional Office staff. Upon completion of the field inspection and confirmation by our field staff that the dam has been repaired in accordance with the approved plan and as reported in the as -built submittal, our office will issue Final Approval. If significant discrepancies are found to exist, revisions may be required before Final Approval can be issued. We endeavor to respond to applications within 60 days of receipt of the application. Please contact Ms. Laura Herbert, PE, Regional Engineer, Land Quality Section, 2090 U.S. Highway 70, Swannanoa, North Carolina 28778, telephone number. (828) 296-4500, or me at telephone number (919) 733-4574.should you have any questions concerning this matter. Sincerely, �> //` W - - Steven M. McEvoy, PE State Dam Safety Engin er. Land Quality Section SMM/rdk cc: Mr. David Odom, PE, Design Engineer Ms. Laura Herbert, PE, Land Quality Regional Engineer Sur• ,ac . W ter � rotection Super ,so Filename: POLK-008_20120124 RECT As-BuiltRepair_Derbyshire Dam 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-707-9220 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 • Internet: http://portal.ncdenr.org/web/lr/land-quality :i HIFEB — 2 2(112 DONCDENR i Carolina Department of Environment and Natural Resources WATER QUALITY sEOTION Division of Land Resources ASHEVFLLE REG[ON,AL O rICE . �; r Land Quality Section ,�..10 e James D.'' imons3 P , PE- ° �- - `•DW61or snd'State° eologist May 10, 2011 BYANA, LLC Attn: Mr. Brian Carroll 467 Sandy Plains Road Tryon, North Carolina 28782 RE: iDerbyshire Dam Polk County State Dam ID: POLK-008 Dear Mr Carroll: Beverly Eaves Perdue, Governor Dee Freeman, Secretary hJAy 17 g011 LAND QUALITY SECTION -MAY 2 0 2011 �,e rlcl �?r;�.+t�r ��ci•ior� A review has been made of the plans, specifications and design data submitted under' over letter dated March 31, 2011, and received in this office on April 1, 2011, for the repair of the referenced dam. The submitted information is an addendum to modify some aspects of the plan that was approved by letter dated March 23, 2011. Prior to issuance of an approval to repair, additional information or revision is requested for the following items: 1. The changes to the principal spillway are hydraulically significant and must be reevaluated by the design engineer. Please provide an analysis of the combination of spillways serving the subject dam that shows that the proposed design meets the requirements of Title 15A Subchapter 2K Section .0205 of the North Carolina Administrative Code. 2. Based on the information provided, the principal spillway (PS) discharge pipe will be installed at a greater than 16% slope. This may increase the exit velocity significantly. Please reevaluate the design of the outlet protection to insure it will be sufficient to handle the expected discharge. In addition, please clarify the design method which is used for the "rip rap plunge pool". It does not appear to be consistent with NRCS Design Note 6. The engineer may wish to consider raising the outlet invert elevation to create a true cantilevered outlet for use in conjunction with a plunge pool design consistent with NRCS Design Note 6. 3. Please modify the profile shown on Sheet 1 of 2 to insure that no portion of the filter diaphragm will be within 2 feet of the ground surface. To accomplish this, the 2 foot dimension should be drawn perpendicular from the downstream slope surface to the nearest point (typically the top downstream comer) of the diaphragm section. MAY 13 2011 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 - Telephone 919-733-4574 / FAX: 91,9-J33,:?87,6=�, 512 North Salisbury Street, Raleigh, North Carolina, 27604 • Internet:hftp://www.dlr.enr.state.nc.us/pages/la6d - - BYANA, LLC Derbyshire Dam ,Revision Request Letter POLK-008 .May 10, 2011 {� Page 2of2 �•_r _, 4. Please show the concrete cradle joints in the profile or provide an additional detail drawing showing the cradle joints. ` It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Please contact this office should you have any questions concerning the above items. Sincerely,! William H. Denton, IV, EIT Assistant Dam Safety Engineer Land Quality Section cc: Mr. David Odom, PE, Design Engineer Ms. Janet Boyer, PE, Acting Regional Engineer S:ur-face Wat'erI?rotectiioeginnaESupe Filename: POLK-008_20110510_revreq_Derbyshire addendum to repair NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources James D. Simons, PG, PE Director and State Geologist Certificate of Approval July 11, 2011 BYANA, LLC Attn: Mr. Brian Carroll 467 Lake Sandy Plains Road Tryon, North Carolina 28782 RE: Approval to Repair Derbyshire Dam Polk -County State ID: POLK-008 Dear Mr. Carroll: Beverly Eaves Perdue, Governor Dee Freeman, Secretary This is in response to your submission dated June 7, 2011, and received on June 13, 2011, of plans, specifications, and design data for repair of the subject dam in compliance with the Dam Safety Law of .1967. This dam, is of high hazard classification. The plans, specifications,, and design data submitted were prepared under the supervision of Mr. David Odom, PE. This letter constitutes approval of the proposal to repair the subject dam according to the plans and specifications received by this Division on June 13, 2011, with the following stipulations: 1. Project construction shall be supervised by Mr. David Odom, PE. Mr. David Odom,. PE, shall be responsible for field observation of construction as necessary to ensure compliance with approved plans. 2. During construction, the Division, of Land Resources may require such progress reports as are deemed necessary. 3. In accordance with GS 143-215.29 and NCAC 15A-2K .0203,..0212, .0215, and-.0216,4 within 30 days of completion of the project, Mr. David Odom, PE, shall inspect the completed work and upon finding that the work has been done as specified and the dam is safe, shall file with the Division of Land Resources two sets of record drawings and a Certificate stating that the work has been completed in accordance with approved plans, specifications and other requirements. 4. No water shall be impounded behind the dam until final approval for operation of this dam is issued by the Division of Land Resources. Also, draining of the lake shall be performed in such a manner as to preclude off -site sedimentation. Geological Survey • Land Quality • Geodetic Survey Division of Land Resources - 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina 27604 Telephone 919-733-3833 / FAX: 919-715-8801 • Internet: http://www.dlr.enr.state.nc.us/index.htmi BYANA, LLC Derbyshire Dam Approval to Repair POLK-008 July 11, 2011 Page 2 of 2 5. - An emergency action plan (EAP) and an operation and maintenance (O&M) plan are required for all high hazard dams. The O&M plan should address routine maintenance, frequency of inspections by the owner or the owner's representative, and annual operation of the bottom drain to ensure that it is functional. It is strongly recommended that the EAP be submitted prior to commencing repairs to address problems that may arise during construction. Nevertheless, both the EAP and O&M plan must be received prior to issuance of an approval to impound. 6. You must notify Ms. Janet Boyer, PE, Acting Regional Engineer, Land Quality Section, 2090 U.S. Highway 70, Swannanoa, North Carolina 28778, telephone number (828).296- 4500 ten days before the start of construction. The Army Corps of Engineers and the Water Quality Section of this Department should be contacted to determine if -additional permits are required. Also, the erosion and sediment control program having jurisdiction should be contacted to determine permit requirements. In any case, sediment must be prevented from entering the waters of the state or flowing onto neighboring property. Construction of the repairs must begin within one year of the date of this letter or this approval is void. For assistance you may contact the Asheville Regional Office at (828) 296-4500 or a staff member of the Dam Safety Program in the Raleigh Central Office at telephone number (919) 733-4574. Sincerely, Z.. - %A • " James D. Simons, PG, PE Director and State Geologist JDS/smm/whd cc: Mr. David Odom, PE Ms. Janet Boyer, PE, Acting Regional Supervisor Surface Water Protection Regional-Supevisor. A0 av, NCDENR North Carolina Department of Environment and Natural Resources Division of Energy, Mineral, and Land Resources Land Quality Section Tracy E. Davis, -PE, CPM Director Final Approval to Impound October 5, 2012 CERTIFIED MAIL RETURN RECEIPT REQUESTED Mr. William H. Fournier 1282 South Barksdale Road Mt. Pleasant, SC 29464 RE: Gamblin (Fournier) Dam Polk County State Dam ID: POLK-032 Dear Mr. Fournier: Beverly Eaves Perdue, Governor Dee Freeman, Secretary This concerns the subject dam recently repaired pursuant to Approval to Repair dated February 25, 2011, as required by the Dam- Safety Law of 1967. Record Drawings and the engineer's certification were received on September 12, 2012. The dam was certified by Mr. Donald J. Sipher, PE. An inspection of this dam was made by Land Quality Section staff of the Asheville Regional Office on October 3, 2012. The dam was found to be in general conformance with the approved plans and specifications, and you may impound water subject to the following stipulation: 1. Repair areas of rill erosion on the upstream and downstream slopes of the dam embankment and establish permanent groundcover in these. areas sufficient to restrain erosion. The Land Quality Section staff will make periodic inspections of this dam to verify that the dam is being maintained in good operating condition. These inspections, however, will be relatively infrequent. It is advised that you closely inspect and monitor your dam, and that you notify your engineer and the Division of Energy, Mineral, and Land Resources if you see or suspect any problems concerning its safety.. J� "K�o :.....zVA—n-,,, _x Sincerely, CY//x- Steven M. McEvoy, PEC�L�E � 11' OCT 10 2012 1 LJf State Dam Safety Engin Land Quality Section ' WATER QUALITY SECTION iLLG _._ T ? OFFICE i . 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-707=9220 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina 27604 • Internet: http://Portal.ntdenr.o[g/web/Ir/land-Quality An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper Mr. Fournier Final Approval to Impound October 5, 2012 Page 2 of 2 SMWwhd cc: Mr. Donald J. Sipher, PE, Design Engineer Ms. Laura Herbert, PE, Asheville Regional Engineer S°uryfaceVar,? otectiomRonalue 0 File Name: POLK-032 20121005 COFA Gamblin (Fournier) Dam POLK-032 NCDENR North Carolina Department of Environment and Natural Resources Division of Energy, Mineral, and Land Resources Land Quality Section Tracy E. Davis, PE, CPM Director September 12, 2012 Mr. William H. Fournier 1282 South Barksdale Road ' Mt. Pleasant, SC 29464 RE: Gamblin (Fournier) Dam Polk County POLK-032-I Dear Sirs: Beverly Eaves Perdue, Governor Dee Freeman, Secretary Mr. Walter Cobb, Jr 985 Seagull Drive Mt. Pleasant, SC 29464 This is to acknowledge receipt of your "as -built" submittal and application for impoundment dated September 5, 2012 for the subject dam. The submittal was received in our office on September 12, 2012. Applications for approval to impound require a comprehensive field inspection by our Regional Office staff. Upon completion of the field inspection and confirmation by our field staff that the dam has been repaired in accordance with the approved plan and as reported in the as -built submittal, our office will issue approval to impound. If significant discrepancies are found to exist, revisions may be required before approval to impound can be issued. We endeavor to respond to applications within 60 days of receipt of the application. Please contact Ms. Laura Herbert, PE, Regional Engineer, Land Quality Section, 2090 U.S. Highway 70, Swannanoa, North Carolina 28778, telephone number (828) 296-4500, or me at telephone number (919) 707-9220 should you have any questions concerning this matter. Sincerely, Steven M. McEv , PE State Dam Safety En . er Land Quality Section SMM/rdk cc: Mr. Donald J. Sipher, PE, Froehling &.Robertson, Inc. Ms. Laura Herbert, PE, Land Quality Regional Engine S?faea eipolioS pt]""sor Filename: POLK-032 20120912 RECT As -Built Repair_Gamblin Dam m - •. .. Yl-�eY,t°f l�'.r).L FSEP 17 2012 WATER QUALITY SECTION REGIONAL OFFICE' : A ASHEVILLE ..;e�.� .�r:.u�ra :i,';1'✓.:�i.osst's .; r:,,uswr, ... .,. r.,.. -v..�.i �v.e+N_7. �:•.9.iG5.R'�L..,'.1 . -. �iKri tn.. 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-707-9220 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina 27604 - Internet: http://portal.ncdenr.org/web/Ir/land-quality An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Land Quality Sectionz" James D. Simons, PG, PE Beverly Eaves Perdue, Governor Director and, State Geologist Dee Freeman, Secretary January 7, 20`11 BYANA, LLC Attn: Mr. Brian Carroll , 467 Lake Sandy Plains Road Tryon, North Carolina 28782 RE: Derbyshire (Sandy Plains) Dam Polk County State Dam ID: POLK-008 Dear Mr. Carroll: pal a xr 3''^ t �c,Tr:;Zva r�4 j•! � +v i xn.•;.�..` e . ,a..w u..anrtw.ra• i ECEoV_E D.x , �� JAW 13 2011 WATER QUALITY SECTION ASHEVILLE REGIONAL OLLEE �Ty..M •! A review has been made of the revised plans, specifications and design data submitted under cover letter dated October 26, 2010, and, received in this office on November 4, 2010, for the repair of•the referenced dam. Prior to issuance;of an approval to repair; additional'information or revision is requested for the following items: 1. The siphon detail on Sheet 6 of 7 does not specify a vent/fill pipe as part of the design. Please address the means by which the siphon will be primed and activated. � In addition, if no vent pipe is provided, once activated the proposed design does not provide for a means to deactivate the siphon until the impoundment is fully drained. Please revise the design to address these issues accordingly. 2. Sheet 5 of 7: The manhole -to -barrel pipe connecting gasket should be clearly specified. Press -Seal is a manufacturer of gaskets such as this one, but the engineer must specify the product" to be used: Please provide product information that indicates the product selected is suitable for the intended use. 3. The proposed seepage filter diaphragms remain inconsistent with NRCS guidance for filter diaphragm construction. The selected filter medium (NCDOT. 57 or 67 aggregate) is inappropriate. The practice of encapsulating filter medium in filter fabric is not mentioned in the'NRCS guidance and is not recommended. Please refer to USDA NRCS National Engineering Handbook Part 628 Chapter 45 for guidance on.their proper construction and filter medium gradation requirements. It is further recommended that a`lateral slotted collector pipe (such as well screen pipe) be located within the filter medium and attached via a tee fitting to a solid -walled discharge 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 • In.ternet:http://www.dlr.enr.state.nc.us/pages/landqua]itysection.html I BYANA, LLC Derbyshire Dam Revision Request POLK-008 January 7, 2011 Page 2 of 2 pipe. The collector pipe should be capped at each end and may be surrounded by NCDOT 78M washed aggregate to prevent loss of filter medium through the system. 4. Sheet 6 of 7: Please specify the d50 size and/or NCDOT designation of the riprap to be used to construct the plunge pool. :. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Please contact this offce_should.you have questions concerning the above items. Sincerely,—, William H. Denton, IV, EIT Assistant State Dam Safety Engineer Land Quality Section - cc: Mr. David W. Odom, PE Ms. Janet Boyer, PE, LQ Regional Engineer Surface Water- Protection Regional Supervisor.) Filename: POLK-008_20110107_revreq_Derbyshire NCDENR OCT zoos North Carolina Department of Environment and Natural. Sou Division of Land Resources WATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE Land Quality Section James D. Simons, PG, PE Director and State Geologist October 2, 2009 Mr. Chris Sinclair Northbrook Power Management, LLC 14550 N. Frank Lloyd Wright Blvd., Suite 210 Scottsdale, Arizona 85260 RE: Turner Shoals Dam Polk County State Dam ID: POLK-009-H Dear Mr. Sinclair: .Beverly. Eaves Perdue, Governor " Dee Freeman, Secretary This is to acknowledge receipt of your report, "Stability and Remedial Option Analyses — AECOM Project No. 60098257" dated September 28, 2009 for the subject dam. The report was received in our office on September 29, 2009. Applications requiring an approval to repair a dam will be reviewed by this office in the order they are received, except that existing high hazard potential dams with known safety problems will be prioritized. We endeavor to respond to applications within 60 days of receipt of the application. Please contact Ms. Janet Boyer, Regional Engineer, Land Quality Section, 2090 U.S. Highway 70, Swannanoa, North Carolina 28778, telephone number (828) 296-4500, or me at telephone number (919) 733-4574 should you have any questions concerning this matter. Sincerely, Steven M. McEv , P State Dam Safety gineer Land Quality Section SMM/JCR cc: Mr. Michael D. Carpenter, PE, Design Engineer - AECOM Ms. Janet Boyer, PE, Land Quality Regional Engineer *Sur_face at r- F otect-ion S�upe�ry sor File Name: POLK-009 20091002 RECT-Turner Shoals Dam— Stability analyses study 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 • Internet:hfp://www.dlr.enr.state.nc.us/pages/landqualitysection.html AL NCDENR North Carolina, Department of Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, PG, PE Beverly Eaves Perdue, Governor Director and State Geologist Dee Freeman, Secretary August 27, 2009 Mr. Chris Sinclair Northbrook Energy, LLC 20 N. Wacker. Drive Suite 3121 Chicago, Illinois 60606 RE: Turner Shoals Dam Polk County State Dam ID: POLK-009-H Dear Mr. Sinclair: A review has been made of the seismic stability evaluation report submitted under cover letter dated June 23, 2009 and received in this office on June 24, 2009 for`improvements to the subject dam. Based on our review, we concur with the evaluation that has been performed and the conclusions reached as a result of that evaluation. Because multiple probable failure modes were identified, we .urge Northbrook Energy, LLC to take the steps necessary to complete the recommended investigations and finalize the proposed mitigation design so that it may be implemented subsequent to review and 'approval by this Division. Before beginning repairs on the referenced dam, 2 sets of plans, specifications, and other pertinent design information for the. work must be filed with the Division of Land Resources for approval pursuant to The Dam .Safety Law of 1967 as amended -and Title 15A, Subchapter 2K of the North Carolina Administrative Code. Please contact this office should you have questions concerning this matter. Sincerely, Steven M. McEvoy, PE State Dam Safety'En ee Land Quality Section cc: Mr. Farzad A. Anaraki, PE Ms. Janet Boyer, PE,, LQS Regional Supervisor Sfcter L eot"`Re n a`up ism Filename: POLK-009 20090827_PrelimResponse 1.612 Mail Service Center, Raleigh, North Carolina 27699-1612 - Telephone 919-733-4574 I FAX: 919-733-2876 512 North Salisbury Street; Raleigh, North. Carolina, 27604 • Internet:http:l/www.dlr.enr.state.nc.us"/pages/landqualitysection.html T 'M NCDENR ' North Carolina Department of.Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, PG, PE Director and State Geologist February 27, 2009 Mr. David Odom, PE Odom & Associates 152 East Main Street Forest City, North Carolina 28043 RE: Derbyshire Dam Repair Polk County POLK-008 Dear Mr. Odom: Beverly Eaves Perdue, Governor Dee Freeman, Secretary rE0VER — 3 2009 QUALITY SECTION E REGIONAL OFFICE A review has been made of the plans, specifications and design data submitted under cover letter received in this office on December 29, 2008 for the repair of the referenced dam. Prior to issuance of an approval to repair, additional information or revision is requested for the following items: General: . 1. Please provide a list of the items of work and materials, the quantity of each item, and the specification that will control the quality of the work or material performed or installed. 2. Please provide a detailed plan for grouting the existing spillway pipe. A non -shrink grout should be included in the specification for this work. Access to the upstream end of the existing pipe may be necessary ensure the pipe is completely filled with grout. Specifications: 1. SECTION 02223 — The replacement of Item 4.3 F with the following statement is recommended: Soil Fill Type S2: The maximum thickness of lift before compaction with manually directed power -tampers shall be 4 inches. The maximum thickness of lift before compaction of all other backfill shall be 9 inches. 2. SECTION 02223 — Please add the following statement to Item 4.3: 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 - Internet:http://www.dir.enr.state.nc.us/pages/landqualitysection.htmI Mr. Odom. February 27, 2009 Page 2 of 5 Each stump hole shall be brought back to existing grade by backfilling with compacted Type S2 fill prior to the placement of the chimney and blanket drain. 3. SECTION 02225 — The replacement of Item,3.3 E with the following statement is recommended: Soil Fill Type S2: The maximum thickness of lift before compaction with manually directed power tampers shall be 4 inches. The maximum thickness of lift before compaction of all other backfill shall be 9 inches. 4. SECTION 2667 — The minimum trench width shown in Item 3.4 C does not agree with the trench sections shown on the drawings. Drawings: Sheet 1 of 4 1. It appears that a turf reinforcing mat is proposed for use under the riprap at the siphon outlet. The use of a non -woven filter fabric is recommended. We could not find a reference to the material specified, Contech TRMC-35, on the Contech web site. 2. The depth of the riprap at the siphon outlet is shown to be 24" on the RIPRAP DETAIL and 3.18' on the ENLARGED DETAIL. The d5o of Class 2 riprap is 14". Please make appropriate changes. 3. Please provide a profile along the centerline of the 50' riprap section and include the . siphon outlet. Sheet 2 of 4 1. 'The EMERGENCY SPILLWAY PLANVIEW does not accurately depict a grading plan for the two spillways. Please revise. 2. In the emergency spillway plan there is a drop of 1.8 feet in approximately 12 feet and this steep slope is not shown on the EMERGENCY SPILLWAY PROFILE. The bottom width of the emergency spillway appears to vary from 26' to 35'. The location of each - channel bottom width and an accurate toe out of each contour based -on the required side slope of the channel should be drawn. 3. There appear to be headwalls at the upstream end of the concrete channel but no details for these headwalls are'shown. 4. What is the length of the concrete channel? Mr. Odom. February 27, 2009 Page 3 of 5 5. The riprap downstream of the concrete channel appears to be spread out on natural ground. Unless a channel is constructed what will keep the flow on the riprap. Please show a cross section and centerline profile of this exit channel. 6. On the PRECAST CONCRETE BOX DETAIL, please'check the inside and outside bottom elevations and correct as appropriate. 7. The trash rack shown on the PRECAST CONCRETE BOX DETAIL does not agree with the details shown on Drawing 4. 8. On the DECORATIVE WATERFALL PROFILE, please explain the 6' WEIR AT ELEVATION 927.5. 9. Please show the pipe lengths on the DECORATIVE WATERFALL PROFILE. 10. Is there a weir gate as mentioned on the EMERGENCY SPILLWAY PLANVIEW? If so please show details.. 11. Please verify the angle where the 22.5° elbow on the DECORATIVE WATERFALL PROFILE is shown: A non -distorted scaled drawing would be helpful. Please show the elbow near the entrance to the 36" pipe. 12. In CONSTRUCTION SEQUENCE # 3 the pool is to be lowered 10 feet below normal. Won't it be necessary to lower the pool more than 10 feet to install the 36" principal spillway, install the 12" siphon, and grout the existing bottom drain in the dry? 13. In CONSTRUCTION SEQUENCE #15 please insert after NCDENR-DLR "and receive approval to impound". Sheet 3 of 4 1. Please check the horizontal and vertical scales shown on SECTION A' -A. 2. Please prepare a non -distorted scaled drawing of the embankment at SECTION A -A and add the siphon using the angles, pipe lengths, and elevations shown. Make adjustments to the siphon as necessary to fit the embankment section. 3. Please show the concrete cradle on SECTION A -A. 4. The addition of a horizontal section of pipe at the siphon outlet is recommended. We recommend the installation of the thrust block vertical instead of leaning as shown. Mr. Odom.' February 27, 2009 Page 4of5 5. Please show the location of the rebar in the thrust block. Will steel be placed in each of the 6 faces with a minimum concrete cover of 2 inches? . 6. Please provide a detail for the valve box at the siphon outlet. 7. What is the propose'd'base for the vent box? Please identify on drawing. 8. The -merging of the riprap channel from the decorative waterfall with -the siphon riprap channel to form a common outlet from the siphon outlet downstream is suggested. A change in the alignment of this channel at, the outlet to reduce the angle change from the riprap channel. to the natural channel is also suggested. If this suggestion is followed, the' riprapping of the two small fill areas could possibly be eliminated. 9. Shouldn't the clearing limits encompass the work area for the installation of the riprap lined channel? 10. There is a portion of the proposed work.area,where no downstream erosion and sediment control measures are provided. Please -ensure that all runoff from disturbed areas passes through such a measure: 11. Please show the limits of the chimney drain -and the limits of the blanket drain. A bottom edge of the chimney that follows along the toe of the existing dam is suggested. 'Unless a blanket drain is'needed downstream of this toe to collect seepage in this. area, you may want to consider the elimination of an extensive blanket drain, and use multiple blanket - drain. fingers that connect the chimney drain to the proposed downstream toe. Where these fingers exit the downstream toe; a reverse filter that consisting of a non -woven geotextile placed over the blanket drain medium, followed by a 6-inch layer of NCDOT . #57 or #78M stone, .followed by an 18-inch layer NCDOT Class B riprap is suggested. Details must be provided on the drawngs. Sheet 4 of 4 1. Please add the trench bottom width of botli the 12" and 36" pipe to each of the EMBANKMENT TRENCH DETAILS. 2. By making the openings in each trash rack larger (not to exceed D/2) some of the smaller trash could pass through the rack: The sizing of each trash rack with sufficient open area to limit the entrance, velocity at maximum discharge to 2 feet/sec. is recommended. 3. Please provide more information for the 2 piece bands. That would include width, thickness, shape, and material. Mr. Odom. February 27, 2009 Page 5 of 5 It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Please contact this office should you have any questions concerning the above items. Sincerely, W. Hubert Hawkins Dam Safety Engineer cc: Mr. Brian Carroll Mr Roger,�Ed;ar's� Surface Water Protection Regional Supervisor Ms: Janet Boyer, Land Quality Regional Engineer Filename: POLK-008_20090227 revreq.doc Derbyshire Dam AL�� NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources James D. Simons, PG, PE Director and State Geologist . November 3, 2008 Mr. Gerald Haskins, PE 120 Resort Street Hendersonville, North Carolina 28792 RE: Gamblin Dam Polk County. POLK=032 Dear Mr. Haskins: Land Quality Section Michael F. Easley, Governor William G. Ross Jr., Secretary I i 1IoV• 1 2 2008 1 1 1 I, \!,'.TER C?UP,LITY SECTION A review has been made of the plans, specifications and design data submitted under cover letter received in this office on April 30, 2008 for the repair of the referenced dam. Prior to issuance of an approval to repair, additional information or revision is requested -for the following items: - General: 1. Please provide a design reportthat includes a narrative of the project, the results of any investigations, all calculations, and specifications for the work. The project narrative should give the location of the dam, the size of the dam and appurtenant structures, the drainage area, a description of the problems and the proposed means of bringing the dam into compliance with the Dam Safety Law of 1967. 2. A _check of the drainage area using NCDOT lidar data shows it to be more than twice the size shown. Please check. 3. A hydrologic and hydraulic (H&H) analysis of the dam and spillway systems must be performed. The dam must be able to store and/or pass the 25 year storm between the normal pool level and the crest of a vegetated emergency spillway and the dam must store and/or pass the 100 year -storm without overtopping. The use of HEC-1, HEC-HMS, or other appropriate means shall be used to perform the H&H analysis. 4. A CHECKLIST FOR APPLICATION TO CONSTRUCT A DAM can be found at the. following web site: hiip://www.dlr.enr.state.nc.us/pages/forms.html. Although this checklist is for a new construct, it can serve as a useful guide for dam repair submittals. If any of the items on this checklist will help to clarify the'proposed repairs it should be addressed in the narrative, by a . calculation, or by a detail on the drawings. 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 •919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 An Equal Opportunity 1 Affirmative Action Employer - 50% Recycled 110% Post Consumer Paper Mr. Haskins November 3, 2008 Page 2 of 3 5. Please provide a topographic map of the embankment. The vertical control for this map should be the same as that'used to develop the storage -elevation data used in the H&H analysis. Drawings: Cover Sheet 1. Please provide the owner's name or contact person, address, and telephone number. 2. Please provide a site location road map. Comments on Drawing provided with submittal. 1. Many of the details are difficult to read and follow and some have missing dimensions. 2. Please provide elevations for the siphon at the entrance, each change in slope, and at the outlet. Pipe lengths should also be shown. 3. The use of the emergency spillway top width (18') for "L" in the outflow -computation is not correct. 4. Why was a 10" pipe used- in the pond outflow calculation instead of 8"? 5. The pipe shown is Schedule 40 PVC. The use of plastic pipe is not addressed in the Dam Safety Rules and Regulations; however, its use is acceptable if it conforms to AWWA C 900 specifications. It must be buried therefore the exposed ends of any conduit must be ductile iron or other material less likely to be damaged by exposure. Ductile iron fittings are compatible with the outside diameter of AWWA C 900 "plastic pipe. 6. The sections through the riprap outlet protection are not identified. 7. If the freeze protection drain remains, additional details will be needed. In lieu of this drain, the outlet section of the siphon could_ be made horizontal so that it will be free draining. 8. If the pipe straps and anchor bolts remain in the revised design, more details are needed. 9. In lieu of encasing the entire siphon in concrete, the siphon sections -on the embankment slopes could be encased with select earth backfill and, the horizontal section through the dam crest would be founded on a concrete SCS (MRCS) Type B 1 bedding and the remainder would be encased with select earth backfill. The bends of the siphon would need to be secured with concrete thrust blocks or a retainer gland such as the Uni-Flange Series 1400 or 1500. 10. The material for the 1 "x3" support for the siphon vent pipe is not identified. 11. A fill cap to prime the siphon should be added to the vent pipe. Mr. Haskins November 3, 2008 Page 3 of 3 12. More detail is needed for the siphon inlet trashrack. Openings in the trashrack that are approximately equal to'/z the siphon diameter are suggested. The trashrack should be sized to hold the entrance velocity to 2.0 ft./sec. or less for the maximum siphon flow. 13. The trench excavated for the siphon must have side slopes no steeper than 2 horizontal to 1 vertical. 14. What are the mix proportions for the non -shrink concrete proposed to fill the existing 10" conduit? The use of a non -shrink grout in lieu of concrete is recommended. Please provide more detail on the proposed grouting procedure. Specifications: 1. A specification should be provided for all -construction and materials in the work. 2. A specification is needed for the compaction and moisture control of the earth backfill. 3. A seeding specification is needed to establish vegetative cover on all disturbed areas not covered with riprap or other protective layer. Please be aware that the comments shown above may not include all revisions that should be addressed. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Please contact this office should you have any questions concerning the above items. Sincerely, W. Hubert Hawkins Dam Safety Engineer WHH/ cc: Mr. William H. Fournier .gerE`dTards, - urface Water Protection Regional Supervisor Ms. Janet Boyer, Land Quality Regional Engineer NIMA NCDENR North Carolina Department of Environment and Natural Resources 'Division of Land Resources James D. Simons, PG, PE Director and State Geologist November 20, 2008 Mr. David Odom, PE, Odom & Associates 152 East Main Street Forest City, North Carolina 28043 RE: Derbyshire Dam Repair Polk County Dear Mr. Odom: Land Quality Section Michael F. Easley, Governor ..,,_,Williarn,!GRoss-dr;�Secretary ' g, .. E 008 SECTION AL OFFICE A review has been -made of the plans, specifications and design data submitted under cover letter received in this office on April 30, 2008 for the repair of the referenced dam. Prior to issuance of an approval to repair, additional information or revision is requested for the following items: General: 1. Your January 2008 submittal included a PRELIMINARY ENGINEERING REPORT but your April 2008 submittal did not include a final engineering report. Please provide a FINAL DESIGN REPORT that includes a narrative of the project, the results of any investigations, all calculations, and specifications for the work. The project narrative should give the location of the dam,,the size of the dam and appurtenant structures, the drainage area, a description of the problems and the proposed means of bringing the dam into compliance with the Dam Safety Law Of 1967. All major items of work to be performed, starting with your erosion and sediment control measures and going through the final seeding and cleanup, should be discussed in the narrative. Drawinl?s: Cover Sheet 1. Please provide the owner's address. Is the owner Byana, LLC or Derbyshire, LLC? Sheet 1 1. In General Note 1 "THE ASL, ELEVATION IS +24.3" is found. Please explain! 2. The location of the 936 contour near the top of the slope of the fill to be added to the downstream face of the dam appears to be further downstream than shown on SECTION A -A on Sheet-3, Please make appropriate changes. v 1612 Mail Service Center,.Raleigh, North Carolina 27699-1612 -919-733-4574-1 FAX: 919-733-2876 t�iUi� •� Z��g 512 North Salisbury Street, Raleigh, North Carolina, 27604 An Equal Opportunity 1 Affirmative Action Employer— 50% Recycled 110% Post Consumer Paper • auf:cvilt� Mr. Odom . November 20, 2008 Page 2 of 5 3. The clearing limits should be shown on the drawings. 4. Please provide a legend for the different hatch patterns shown and/or identify them. The identification of all components of the proposed work on the ENLARGED DETAIL is suggested. 5. Is there an existing bottom drain? If there is, please locate it on this drawing and describe the plans for it. 6. The. riprap pad at the 12" siphon outlet is shown to have a D50 (median size) of 24". The maximum size stone could be 36". Do you wish to use a stone size that exceeds NC DOT Class 2 riprap? Sheet 2 1. The size of the precast concrete box is shown to be 4'x8' in several of the notes and is dimensioned to be 6'x6' (inside). Please correct were appropriate. The drawing provided by the structural engineer, Mr. Thompson, shows the box to have "outside" dimensions of 6'x6'. 2. The elevations and details on the -DECORATIVE WATERFALL PROFILE and the detail immediately below the SPILLWAY CROSS-SECTION do not agree. Please correct. 3. The EMERGENCY SPILLWAY PROFILE appears to show a change in bottom grade near station 0+25. A uniform grade for the entire exit slope is recommended. 4. Is a 45' bend for the DIP compatible with the existing upstream slope of the embankment? The topography indicates an upstream slope approximating 3 horizontal to 1 vertical. 5. There is a 7' cut into the embankment at the downstream face of the precast box. On the EMERGENCY SPILLWAY PLAN VIEW more than one contour merges to a common point which gives a vertical slope at that point. A more detailed grading plan is needed to clearly define the side slopes of the required cut. The relocation of the precast box to station 0+60 on the DECORATIVE WATERFALL PROFILE is recommended to increase the seepage path along the 36" conduit. 6. Please review Design of SmalrDams, USDI-Bureau of Reclamation, 1987, Chapter 9 Section G, for guidelines on the proper design of concrete spillway channels on earth foundations. Some specific items to address are reinforcement, joints, cutoffs, and drains. 7. , Since the permanent flow will discharge through the concrete spillway channel the flow area from the outlet end of the, spillway to the existing channel must be protected from erosion. 8. Please provide a detail for the trashrack at the inlet end of the 36" DIP. 9. Please include all major work items in the CONSTRUCTION SEQUENCE. One item not shown is the clearing and grubbing. Other items may need to be added. Mr. Odom November 20, 2008 Page 3 of 5 Sheet 3 1. Please show the angle at each bend on the 12" siphon. -Please make sure the change in alignment at each bend on the scaled drawing truly represents the angle of the fitting. 2. Please show a detail for the 12" siphon trashrack. A suggested trashrack size would limit the entrance -velocity at maximum discharge to a maximum of 2 feet per second. 3. In lieu of exposing the inlet sections of the 12" and 36" DIP and using the wood anchors, the burying of these pipes with a minimum of 18" of cover is recommended. The effectiveness of the wood anchors to provide adequate support for the heavy DIP is suspect. If a decision is made to continue with the use of the wood anchors in the final design, dimensions of all components must be provided along with design calculations to show they are adequate to provide the required support. 4. The side slopes of each trench should be no steeper than 1 horizontal to 1 vertical on the embankment slopes and 2 horizontal to .1 vertical through the embankment crest. Typical cross sections of the required trench excavations must be provided. 5. Please provide a model number or specification for each gate valve. 6. Please show the pipe lengths between bends. 7. What is the third dimension of the 4'x4' concrete thrust block atthe outlet end? Please show required reinforcement. 8. Should the units for the fill be cubic yards instead of square yards? 9. The chimney drain should consist of a finer grained material than #57 stone. A material no coarser than North Carolina Department of Transportation 2S sand is suggested. Please show the extents of the chimney and blanket drains in plan view. What is the required material and thickness for the blanket drain? Is the blanket drain to serve as an outlet for the chimney drain? 10. On the plan view it appears the riprap outlet pad is not in the existing outlet channel and it appears the outlet channel downstream of the .pad is being filled in by the new downstream slope. By what route will outflow from the siphon get back to the downstream channel? This may be improved with changes made as discussed in Item 2 under Sheet 1. 11. The thickness of the riprap pad should be 2.25 times D50 and the placement of a non -woven geotextile under the riprap, protected by a thin layer of gravel, is recommended. 12. A varmint guard is not normally placed on a siphon outlet, especially one with a diameter of 12".. 13. On the VENT DETAIL the siphon inlet invert is shown to be 930.7 and this does not appear to agree with SECTION A -A. Please check. The leader also points to the 2" ball valve. 14. The use of a "tapped tee" in lieu_ of a reducer tee is suggested for the siphon vent pipe. Mr. Odom November 20, 2008 Page 4 of 5 15. The means of access to the inside of the valve and vent pre-fab concrete boxes is not clear. 16.._What do the two vertical lines under the 2" ball valve represent? 17. What is the purpose of the 4"x4" support immediately upstream of the vent box? If it is to support the vent pipe, please show how it will be secured to the post. 18. On the PLAN VIEW the only erosion & control measure shown is silt fence. Will other measures shown on Sheet 4 be use? If so please identify them on this view. Sheet 4 1. Please show the dimensions of the concrete cradle. It is probably not necessary to reinforce the cradle. 2. The TRENCH DETAIL the vertical trench wall should be eliminated by starting the 2:1 slopes at the bottom grade of the cradle. 3. What type of blanket is to be used in the LINED CHANNEL DETAIL? Specifications: 1. SECTION 02110 — The extent of tree and shrub removal could not be located on the plans as stated. What is considered an adequate depth for stump and root removal? 2. SECTION 02223 — What type material is required in the downstream embankment slope? To what density will the embankment fill be placed? The acceptance of moisture limits that are within 2 percentage points of optimum is suggested. The use of Type A3 fill in cut out soft areas is not recommended in dams. All stump holes must be backfilled to grade with select backfill material prior to the placement of the chimney drain. 3. SECTION 02225 — The use of No 67 stone in -trenches where water is present or dewatering is required is not acceptable in dams. 4. SECTION 02275 — Should the statement concerning bagged mix be at the end of this specification? 5. SECTION 02667 — Please provide the class of DIP to be use. 6. SECTION 2936 — In item 3.5 A. the seeding rates are identified in Part 2.1 instead of Part 2.2. 7. Please provide a list of the pay items of work, the quantity of each item, and the specification that will control the quality of each item of work or material performed or installed. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Please contact this Mr. Odom November 20, 2008 Page 5 of 5 office should you have any questions concerning the above items. Sincerely, W. Hubert Hawkins Dam Safety Engineer WHH/ cc: Brian Carroll r. Roger E wardSurface er Protection Regional Supervisor Ms. Janet Boyer, Land Quality gional Engineer P NCDENR North Carolina Department of Environment and Natu Division of Land Resources Land Quality Section James D. Simons, PG, PE Director and State Geologist April 20, 2009 Byana, LLC Attention: Mr. Brian Carroll 467 Lake Sandy Plains Road Tryon, North Carolina 28782 RE: Sandy Plains Dam (aka Derbyshire Dam) Polk County State Dam ID: POLK-008 Dear Mr. Carroll: ®ECE /° APR 2 4 2009 al Ra eVALITY SECTION ASHEVILLE REGIONAL OFFICE : Beverly haves _Perdue; Governor" :" Dee Freeman, Secretary This is to acknowledge receipt of your revised application dated April 7, 2009 for the repair of the subject dam. The application was received in our office on April 8, 2009. Applications requiring an approval to repair a dam will be reviewed by this office in the order they are received, except that existing high hazard potential dams with known safety problems will be prioritized. We endeavor to respond to applications within 60 days of receipt of the application. Please contact Ms. Janet Boyer, Regional Engineer, Land Quality Section, 2090 U.S. Highway 70, Swannanoa, North Carolina 28778, telephone number (828) 296-4500, or me at telephone number (919) 733-4574 should you have any questions concerning this matter. Sincerely, Steven M. McEvoy, State Dam Safety Engin Land Quality Section SMM/JCR 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • Telephone 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh; North Carolina, 27604 • Internet:hUp://www.dir.enr.state.nc.us/pages/landqu alitysection.html Mr. Brian Carroll April 20, 2009 Page 2 of 2 cc: Mr. David W. Odom, PE, Design Engineer — Odom & Associates, Inc. Ms. Janet Boyer, PE, Land Quality Regional Engineer ---Surface Water Prot&tion_Supervisor--, File Name: POLK-008 20090420 RECT Sandy Plains aka Derbyshire repair — resub. NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, PG, PE Director and State Geologist May 6, 2009 Mr. David Odom, PE Odom & Associates 152 East Main Street Forest City, North Carolina 28043 RE: Derbyshire Dam Repair Polk County POLK-008 Dear Mr. Odom: Beverly Eaves Perdue, Governor Dee Freeman, Secretary RMAY 13 200910 WATER QUALITY SECTION HEVILLE REGIONAL OFFICE A review has been made of the plans, specifications and design data submitted under cover letter received in this office on April 8, 2009 for the repair of the referenced dam. Prior to issuance of an approval to repair, additional information or revision is requested for the following items: General: 1. Please review -the quantities of materials and associated units shown in the list of materials provided and make changes as appropriate. Does CY represent cubic yards? Specifications: 1. SECTION 02667 provided this time is totally different from the previous submittal and starts with PART 4. The previous SECTION 02667 was for PIPE MATERIALS and the most recent submittal is for PIPE, FITTINGS AND VALVES. The change of the minimum trench width in Item 3.4 C could not be verified. Drawings: Cover Sheet 2. Please add the hazard classification for this dam to this sheet. Sheet 1 of 6 1. Please add a legend or identify the items and/or areas this sheet depicts. 1 1612 Mail Service Center, Raleigh, North Carolina 27699-1612., Telephone 919-733-4574 / FAX: 919-733-2876 51-2 North Salisbury Street, Raleigh, North Carolina, 27604 • Internet:hUp://www.dIr.enr.state.nc.us/pages/landqualitysection.htmI 0 Mr. Odom. May 6, 2009 Page 2 of 4 Sheet 2 of 6 1. On the RIP -RAP DETAIL @ SIPHON, CONTEC EF134 is show under the washed stone. This material is an erosion control blanket of wood fibers and is not appropriate for this application. You' should specify a non -woven geotextile as shown on SECTION B-B on Sheet 4 of 6. Sheet 3 of 6 1. Please provide a detailed plan view and elevation view of the PRECAST CONCRETE BOX and HEADWALLS. All dimensions must be shown. 2. There should be longitudinal reinforcing in the walls perpendicular to the reinforcing shown. Please provide calculations for the wall stability and structural design. 3. Please provide details for the aluminum grating and weir gate on the 6'x6' precast concrete box or remove all references to these items. - 4. The EMERGENCY SPILLWAY PLAN VIEW shows the junction of the side slopes with the bottom to be rounded instead of coming to a point as shown on A -A SPILLWAY CROSS SECTION. 5. The PRECAST CONCRETE BOX DETAIL shows the concrete channel to have a bottom width of 6' at the box and in the EMERGENCY SPILLWAY PLAN VIEW the channel bottom width at the box to be 10'. Please correct. 6. Please provide a profile for the concrete channel. You may -want to include it on the spillway detail on Sheet 5 of 6. Please show the bottom elevation at each end: The length of the concrete channel should be shown on the drawings. The construction contours around the concrete channel do not appear to be correct. The 930 contour is parallel to the top of the concrete at for a distance of approximately 10 feet and parallel to the channel bottom for a distance of approximately 6 feet immediately downstream of the box. This would indicate that the top and bottom of the channel is level at these two sections. 8. Will there be a constructed channel from the end of the concrete spillway to where it junctions with the natural draw? Please add to grading plan if there is one. 9. What is the width,and depth of the riprapped channel? Show on drawings. 10. Please check the stationing on the 36" DIP. Two 0+00 stations are shown. 11. How will the 36" DIP be supported to install the concrete cradle? Please show on drawings. 12. To increase the emergency spillway bulk length, the extension of the top of spillway (Elev. . 933.8) to approximate station 0+50 is recommended. Please show the actual spillway finish grade on the,profile. Mr. Odom. May 6, 2009 Page 3 of 4 Sheet 4 of 6 1. Please review siphon bends, invert elevations, and lengths and make appropriate changes. 2. The extent of the concrete cradle under the siphon is not shown. The use of the cradle on the siphon section between the front and rear apex is suggested. The limits of the cradles use must be shown on the drawings. 3. If the orientation of the thrust block is important, please indicate the desired orientation with dimensions on SECTION B-B. . 4. On the VENT DETAIL the siphon has a level section while on SECTION B-B the siphon slopes in both directions from the apex. Please adjust as appropriate. 4. In the BLANKET DRAIN TOE DETAIL, the use of non -woven geotextile between the proposed fill and the stone and riprap is recommended. 5. The chimney drain appears to,extend to the downstream toe of the new fill. We discussed this earlier and it was my understanding the chimney drain would be placed against the existing downstream slope and the blanket drains would provide outlets for the chimney drain. Please make appropriate changes. 6. On SECTION B-B please show the stone and riprap thicknesses. As shown the riprap thickness is not uniform. 7. The clearing limits on the PLAN VIEW should allow working space around the perimeter of the embankment toe and the riprap channel. 8. It appears that significant quantities of materials will need to be stockpiled on site: Please show the stockpile area(s) and/or construction staging area(s) and extend the clearing limits as appropriate. 9. The merging of the multiple riprapped areas south of the siphon outlet into one riprapped drainage way is suggested. 10. On the PLAN VIEW the station at the concrete box is not clear. Sheet 5 of 6 1. The grouting details appear to be for the placement -of grout under a plate rather than filling a pipe in a dam. Please explain and adjust as necessary. Do you plan to drain the pond to perform the grouting? If not how will you verify that the pipe is completely filled with grout? 2. Was the RIPRAP LINED CHANNEL CENTERLINE PROFILE surveyed or taken from the - topography shown on Sheet 1 of 6? The centerline appears to follow the contour in several reaches. Please show the channel bottom and approximate top of bank on the final profile. Mr. Odom. May 6, 2009 Page 4 of 4 3. Please provide a detail for the connection of the 36" DIP to the precast concrete box. 4. A joint in the pipe and cradle near the face of the concrete slab for articulation is required. Please show on drawings. Sheet 6 of 6 Please show that the detail presently identified as EMBANKMENT CREST TRENCH DETAIL applies for the entire length of the 36" DIP. The name of this detail may need to be changed. Please include a trench detail that shows the trench for the 12" siphon to have 2:1 side slopes through the embankment crest. 2. Apparently my statement concerning the trash rack opening size was a bit confusing. It should have said: By making the openings in each trash rack larger (not to exceed D/2), some of the larger trash will be able to pass through the pipe instead of collecting on the trash rack. Was the size of each trash rack checked to see if the open area is sufficient to limit the entrance velocity at maximum discharge to 2 feet/sec. as recommended? Please provide calculations. 3. Please provide more information on the bolting of the 2"x4" angles to the band. Are they to be bolted to the 2" securing band? _ Please be aware that the above Jist of comments may not reflect all the changes that should be made to your next submittal. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted -with two sets of the revised plans, specifications and design data. Please contact this office should you have any questions concerning the above items. Sincerely, W. Hubert Hawkins Assistant Dam Safety Engineer WHH/ cc: c--Mr. Brian Carroll Mr. Roger Edwards4, Surface Water Protection Regional Supervisor Ms. Janet Boyer, Land Quality Regional Engineer Filename: POLK-008_20090506_revreq.doc_Derbyshire Dam NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Land Quality Section Michael F. Easley, Governor William G. Ross, Jr., Secretary James D. Simons,.PG, PE Janet S. Boyer, Regional Engineer June 30, 2006 NOTICE OF DEFICIENCY rFJ C E CERTIFIED MAIL-7002 0460 0001 9899 1819 L -5 2006 RETURN RECEIPT REQUESTED Mr. Mark Sunquist I WATER CQUALIT`( SECTION ASHFVILLE REGIONAL OFFICE Northbrook'Power Management, LLC , 20 North Wacker Drive Suite 3121 Chicago, IL 60606 RE: . Polk-009, Turner Shoals Dam (Adger Lake) - Polk County Dear Mr. Sunquist: The Dam Safety Law of 1967 provides for the certification and inspection of dams in the interest of public health, safety, and welfare, in order to reduce the risk of failure of dams, to prevent injuries to persons, damage to downstream property, and to. ensure the maintenance of stream flows. A visual inspection. of the referenced dam was conducted on June 28, 2006 by staff of the Land Quality Section, Asheville -Regional Office. While on site we met with Messrs. Jeff and Darrel McGraw. We appreciate their assistance. During, this inspection, the following conditions were ,noted: Deterioration at various locations on the dam as follows: ■ Area and joints around the intake of the penstocks; ■ Penstock joints; ■ Support beams'of the penstocks at junction with intake structure; ■ Joint on left side of intake structure;.and ■ Right top section of the intake structure. 2090 US Highway 70, Swannanoa, North Carolina, 28778-8211 Telephone 828-296-4500 Fax 828-299-7034 One www.enr.state.nc.us Nortth'C/ay�rolliina An Equal Opportunity / Affirmative Action Employer Notice of Deficiency Turner Shoals Dam June 30, 2006 Page 2 of 3 ■ Seepage was noted through many of these areas of deterioration. Because of water flow through spillway during this inspection, a complete inspection of -the spillway could not be performed. During the previous inspection on April 18, 2005 deterioration and seepage were noted on the spillway arches, about 5 joints down from the crest of the dam. Deterioration wa's also noted on the corbels during the Spring 2005 inspection. These conditions appear serious and justify further engineering study to determine appropriate remedial measures. In the event of a dam failure, human Fife and significant property would be endangered because of the downstream location of NC Highway 9, other roads, and possibly residences. Continued deterioration of the concrete undermines the structural integrity of the dam. Seepage contributes to the deterioration by leaching constituents of the concrete and promoting freeze/thaw damage. In order -to ensure the safety of this dam, you are directed to retain the services of a registered professional engineer or an experienced engineering firm to make a study of the conditions outlined in this letter. Plans and specifications for repair based on the results of the study must be filed with the Division of Land Resources for approval pursuant to the North Carolina Administrative Code, Title 15A, Subchapter 2K - Dam Safety (15A NCAC '2K). Two copies of this study and plan shall be submitted to this office by January 1, 2007. In addition to the above, the following remedial actions, not requiring, design or approval, should be completed by September 1, 2006. These items include the following: ■ Cut and remove all woody vegetation within 20 feet of the dam, including that on the actual dam walls. An updated emergency action plan.,(EAP) is also.required for this dam. The downstream hazards shall be checked and all contact information should be verified as part of this update. Two copies of the EAP shall be submitted to the Division of Land Resources, and a copy - shall be provided to the local emergency management office by September 1, 2006. We also request copies of any dam reports or correspondence written prior to December 1996 when the dam was regulated by the Federal Energy Regulatory Commission or the North Carolina Utilities Commission. These documents may include engineering studies, repair reports, inspection reports, plan drawings and specifications. This will help us complete our files of this dam for the period prior to our jurisdiction. of Deficiency rner Shoals Dam June 30, 2006 Page 3 of 3 Please contact us at 828-296-4500 to advise us of your intended action in this matter. We look forward to receiving this notification by September 1, 2006. These request are made under the authority of The Dam Safety Law 1967, NCGS 143-215. Sincerely, ?anet Boyer, PEl Engineer cc: Jeff McGraw, 40 Halfmoon Lane, Mill Spring, NC 28756 doge EJwards3-SuKface--WateraProtection-,RegionalSSupetvisor). Maxwell Fowler, PE, State Dam Safety Engineer G:\LQ\Polk\Dams\009 Turner Shoals\NOD_6_29_06.doc NC®ENR North Carolina Department of Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, P.G., P.E. Director and State Geologist January 29, 2007 Mr. J. Charles Ahlrichs, PE Northbrook Energy, LLC 20 N. Wacker Dr. Suite 3121 Chicago, Illinois 60606 RE: Turner Shoals (Lake Adger) Darn State I.D. POLK-009 Dear Mr. Alhrichs: Michael F. Easley, Governor William G. Ross Jr., Secretary D F :EB77. FEB - 1 00 WATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE This is to acknowledge receipt of the consulting engineer's inspection report for the subject dam dated January 2007. The report was received in the Asheville Regional Office on January 22, 2007 and a copy was received in the Raleigh Central Office on January 25, 2007. We will endeavor to review the. report and respond within 60 days. You may contact Ms. Janet Boyer, PE, Regional Engineer at telephone nuinber (828) 296-4500 or a member of the central office dam safety staff at (919) 733-4574 if we may be of assistance. Sincerely, Maxwell R. Fowler, PE State Dam Safety Engineer cc: Mr. Jeff McGraw Mr. Paul E. Cyr, PE, Kleinschmidt Energy and Water Resources Consultants Mr: Roger Edwards,; Surface -Water Protection Regional -Supervisor-, Ms. Janet Boyer, PE, Regional Engineer . h 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina 27604 919-733-45741 FAX: 919-733-28761 Internet: www.dir.enr. state,nc.us/dlr,htm An Equal Opportunity 1 Affirmative Action Employer-50% Recycled 110% Post Consumer Paper NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, P.G., P.E. Michael F. Easley, Governor Director and State Geologist William G. Ross Jr., Secretary Certificate of Approval { February 23 2007 r Mr. Wayne' Shields l ': 10 Shytle Road MAR - 1 2007 Columbus, North Carolina 28722 WATER QUALITY SECTION . - RE: Approval to Impound _ ASHEVILLE REGIONAL OFFICE Wayne Shields Dam State I.D. POLK-044 Dear Mr. Shields: This concerns the subject dam recently constructed pursuant to issuance of an Approval to . Construct on July 10, 2006'as required by the Dam Safety Law of 1967. Record -Drawings and the engineer's certification were received on November 30, 2006 from the Natural Resources Conservation Service. The owner's certification and check 1568 in the amount of $464.98 serving as the additional application processing fee was received on December 18, 2006. An inspection of this, dam was made by Land Quality Section staff of the Asheville Regional Office on January-11, 2007. The dam was found'to be in general conformance with the approved plans and specifications, and you may impound.water. The Land Quality Section staff will make periodic inspections of this dam -to assure that the dam 'is being maintained in good operating condition. These inspections, however, will be relatively infrequent. It is advised that you closely inspect and monitor your dam, and that you notify your engineer and the Division of Land Resources if you see or suspect any problems.. Sincerely, n� Maxwell R. Fowler, PE State Dam Safety Engineer cc: Mr. Samuel Bingham, PE, Civil Engineer, NRCS Mr'.;.RogerEdwards;_Surface`Water�PrgtectiomRegiorial Supervisor Ms. Janet Boyer, PE, Land Quality Regional Engineer 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 919-733-4574 /'FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper NCDENR North Carolina Department of Environment and Natural Division of Land Resources Land Quality Section Michael F. Easley, Governor James D. Simons, PG, PE, Director and State Geologist February 27, 2008 NOTICE OF DEFICIENCY CERTIFIED MAIL-7005 1820 0002 9207 2430 RETURN RECEIPT REQUESTED. Three Lakes Restoration Corporation Mark Wilson Route 1, Box 362 Flat Rock, NC 28731 RE: English Heifer Cove Dam ID # 021 - Polk County Dear Mr. Wilson: C E 0 ll]DiE FEe 2 8 M iurce WATER QUALITY SECTION AS:iEVILL= REGIONAL OFFICE William G. Ross, Jr., Secretary Janet S. Boyer, PE, Region al,Engineer The Dam Safety Law of 1967 provides for the certification and inspection of dams in the interest of public health, safety, and welfare, in order to reduce the risk of failure of dams, to prevent injuries to persons, damage to downstream property, and to ensure the maintenance of stream flows. A visual inspection of the referenced dam was conducted on December 7, 2007, by staff of the Land Quality Section Asheville Regional Office. During this inspection, the following conditions were noted: 1. The principle spillway system is inadequate and needs to be investigated. The riser/barrel system no longer exists and has been replaced with a 16" flexible pipe running down the right abutment. 2. The trash guard is made of chicken wire and is inadequate. 3. A fence has been placed in the entrance to the emergency spillway. This could cause the emergency spillway to become obstructed. The fence needs to be removed. These conditions appear serious and justify further engineering study to determine appropriate remedial measures. In the event of a dam failure, human life and significant property would be endangered because of the downstream location of a several unnamed private roads. 2090 US Highway 70, Swannanoa, North Carolina, 28778-8211 =<� Telephone 828-296-4500 Fax 828-299-7043 One www.enr.state.nc.us NorthCarolina An Equal opportunity / Affirmative Action Employer Naturally Notice of Deficiency English Heifer Cove Road February.2,7, 2008 Page 2 of)2 'U -931 In order to ensure the safety of this dam, you are directed to retain the services of a registered professional engineer or an experienced engineering firm to make a study of the conditions outlined in this letter. Plans and specifications for repair based on the results of the study must be filed with the Division of Land Resources for approval pursuant to the North Carolina Administrative Code, Title 15A, Subchapter 2K - Dam Safety (15A NCAC 2K). Two copies of this study and plan shall be submitted to this office by April 25, 2008. In addition to the above, the following remedial actions, not requiring design or approval, should be completed by April 25, 2008. These items include the following: 1. Remove trees and high bushes on the front and back slopes and establish a grass groundcover. 2. Remove the trees at the toe contact and establish a grass groundcover. 3. Remove the fence that has been placed in the entrance of the emergency spillway. Also, the emergency spillway needs to be cleared to allow better flow conditions. You are instructed to drain the impoundment and keep it drained until necessary repairs are made or a breach plan is submitted and approved by The Division of Land Resources. For earthen dams the rate of draw down shall not exceed 1 foot per day unless approved by our office. Siphoning shall be done under the supervision of a licensed engineer experienced in dam design. The draining shall be done in such a way to minimize the sediment load at the outlet. Contact The North Carolina Division of Water Quality, Roger Edwards, at (828) 296-4500 for additional information on their requirements. An updated Emergency Action Plan (EAP) will be required for this dam if one is not already on file. If an existing EAP has not been updated in the past year, the downstream hazards shall be checked and all contact information should be verified. Two copies of the EAP shall be submitted to the Division of Land Resources, 1612 Mail Service Center, Raleigh, NC 27699-1612, Attn: State Dam Safety Engineer, and a copy shall be provided to the local emergency management office. Please contact us at 828-296-4500 to advise us of your intended action in this matter. If we do not receive notification on or before April 25, 2008, we shall present the case information for appropriate enforcement action. Enforcement action could include a civil penalty of up to $500.00 per day of violation, and/or issuance of a Dam Safety Order requiring the repair or removal of this dam, and/or injunctive relief to gain compliance. Sincerely, 3anet S. Boyer, PE egional Engineer cc: Ro9or_Edwards, Surface=VVater__P.r_otection Regional: Supervisor G:\LQ\Polk\Dams\021 English Heifer Cove Dam\NOD 02 27 08.doc &T4 NCDENR North Carolina Department of Environment'and Natural'Resources Division of Land Resources James D. Simons, PG, PE Director and State Geologist July 10, 2006 CERTIFIED MAIL RETURN RECEIPT Mr. Wayne Shields 10 Shytle Road Columbus, North Carolina 28722 RE: Approval to Construct Wayne Shields Dam Polk County . Dear Mr. Shields: Certificate of Approval Michael F. Easley, Governor William G. Ross Jr., Secretary yr: �;�•.< ....... __ � .�.. _ J s. i D JUL 1 3 2006 I WATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE This is in response to your submission dated May 10, 2006 and received on May 12, 2006 of plans, specifications and design data for the construction of the subject dam in compliance with the Dam Safety Law of 1967. The proposed dam will be. located on a tributary to Buck Creek in.the Broad River basin. The USDA Natural Resource Conservation Service (MRCS) prepared the above listed documents. Also, Check No. 1473 in the amount of $200.00 serving asthe minimum application processing fee was received on May 12, 2006. This letter constitutes approval of the proposal to construct the subject dam according to the plans and specifications received by this Division on May 12, 2006 with the following stipulations: 1. NRCS shall provide engineering supervision. 2. All pressurized pipes inside the dam shall be encased inside another pipe. This includes pipes supplying livestock watering facilities, irrigation intakes, and drainpipes. The encasing pipe shall be vented at the toe of the dam. This is to prevent a pressurized pipe from being in direct contact with the dam fill material, presenting a danger of internal erosion of the dam if a leak developed. 3. An appropriate trash guard shall be provided for the proposed siphon inlet. 4. Siphon spillway pipe joints shall be sufficiently airtight and watertight for the intended purpose. 5. Sand used to construct the seepage diaphragm shall be of a gradation adequate to control internal seepage without allowing movement of material from within the dam embankment. 6. A minimum of two vertical feet of cover for the siphon pipe is recommended. Geological Survey • Land Quality - Geodetic Survey Division of Land Resources i,1612 Mail Service Center, Raleigh, Noah Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina. 27604 919-733-38331 FAX: 919-715-88011Internet: ww'w.dlr.enr.,state.nc,us/dlr.htm An Equal Opportunity 1 Affirmative Action Employer— 50% Recycled 110% Post Consumer Paper Mr. Wayne Shields July 10, 2006 Page 2 of 2 7. During construction, the Division of Land Resources ,may require such progress reports as are deemed necessary. 8. Photographs shall be made of all phases of construction and retained by the owner or engineer. 9. Upon completion of the project, NRCS shall inspect the completed work and upon finding that the work has been done as specified, and the dam is safe, shall file with the Division of Land Resources two sets of record drawings and a certificate stating that the work has been completed in accordance with approved plans, specifications, and other requirements. 10. No water shall be impounded behind the dam until an Approval to Impound is issued by the Division of Land Resources for operation of this dam. 11. You must notify Ms. Janet Boyer, Regional Engineer, Land Quality Section, 2090 US Highway 70, Swannanoa, North Carolina 28778, telephone number (828) 296-4500 ten days before the start of construction. The Army Corps of Engineers and the Water Quality Section of this Department should be contacted to determine if additional permits are required. Also, the erosion and sediment control program having jurisdiction should be contacted to determine permit requirements. In any case, sediment shall be prevented from entering the waters of the state or flowing onto neighboring property. I am enclosing a copy of an Owner's Certification Form and an explanation of the final processing fee calculation. An additional fee will be required when the engineer's certification is submitted if the construction cost exceeds $10,001.00. In any event, the cost certification must be completed and returned with the engineer's certification before an Approval to Impound can be processed. The Dam Safety Law of 1967 requires that project construction commence within one year from the date of this approval, or the approval is void. For assistance, you may contact Ms. Janet Boyer, PE in the Asheville Regional Office at telephone number (828) 296-4500 or a member of the Dam Safety Program staff in the Raleigh Central Office at telephone number (919) 733-4574. Sincerely, Maxwell R. Fowler, PE State Dam Safety Engineer MRF/whd Enclosures cc: USDA-NRCS Mr: Roger=Edwaxds,� Ms. Janet Boyer, PE �2 L HOLMAN NORTH CAR-OL.INA DF-PARTMENT OF ENVIRONMENT AND NATURAL RF-soURr-E:S DIVISION OF LAND RESOURCES December 5, Dr. -Robin V. Smith 353 H Stre"e't,: Suite"G -Chula Vista, Calif6m. ia-:91,91 0 RE: Approval to Construct Robin Smith Dam,-, Polk County Broad River Bas_in; Dear Dr;- Smith: This is in response to yddr submissions dated January 11, 1999 and January 11,'2000 which were received oh-Ja'huary 14, 1999 and January 21- 2000, respectively., of plans, spe cifications and design data for construction �f the subject dam in Polk County on a tributary to Little, Fall Creek -in compliance with, the Dam Safety Law of 1967.. These plans, specifications and design data. were prepared under the superVision-of.Mr. J. C. Burgarner, P. E. This letter constitutes approval of the proposal to co'nstruc.t.the subject -dam according to the plans and specifications received'by this Divisibn,on January 21, 2000 with the following stipulations: 1 Proj�edt constructiibn. shall be ..supervised by W J.r C. Bbmgqr.n_e'r, P. E. 2. During construction the 'Division 'of Land Resources may require such progress reports as are deemed necessary. 3. Upon completion of the project, Mr' J. C. Bdmgarner; P. E., shall inspect the completed work; and upon, finding (a) that the Work has been done as specified and (b) that the dam is safe, shall file -with the Division of -Land Resources.two sets of "as -built". drawings and a certificate stating that the work has be6n.clompleted in accordance with approved, plans, specifications, and otherrequirements. LAND,QUALITY SECTION (919)733-4574, FAX (919)733-1876 GEOLOGICAL SURVEY SECTION (919)733-2423 FAX(919)733-0900 16-12 MAIL SERVICE CENTER RALEIGH, NC 27699-1612 (919)733-3833 . FAX (919)715-8601 AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION' EMPLOYER 50% -RECYCLED / 10% POST -CONSUMER PAPER DENR TOLL FREE HOTLINE: 1-877-623-6748 Mr. Robin Smith December 4, 2000 Page Two 4. No water shall be impounded behind the dam until an approval to impound is issued by the Division of Land Resources for operation of this dam. 5. An operations and maintenance (O&M) schedule and an emergency action plan (EAP)' are required for this dam. The O&M schedule should address routine maintenance of the embankment, annual operation of the bottom drain to ensure that it is functional, periodic inspections by the owner or the owner's representative, and the frequency of piezometer readings. You may wish to contact the local Division of Emergency Management or this office for assistance in developing an EAP for this dam. The O&M schedule and the EAP must be received before an Approval to Impound can be issued by this office. 6. You must notify Mr. Richard A. Phillips, P. E., Regional Engineer, Land Quality Section, 59 Woodfin Place, Asheville, North Carolina 28801, telephone number (828) 251-6208 ten days before the start of construction. I am enclosing a copy of a cost certification form and an explanation of the final processing fee calculation. An additional fee will be required when the engineer's certification is submitted if the construction cost exceeds $10,001.00. In any event, the cost certification must be completed and returned with the engineer's certification before an approval to impound can be processed. The Dam Safety Law of 1967 requires that project construction commence within one year from the date of this approval, or the approval is void. Sincerely, v Charles H. Gardner, P. G., P. E. CHG/MRF/ Enclosure cc: Mr. Richard A. Phillips, P. E. Mr. Maxwell R. Fowler, P. E. Mr. J. C. Bumgarner, P. E. ClVvlr'F.o_r_rest_R �Westall-"PEE_ NCDENR North Carolina Department -of Environment and Natural Resources Division of Land Resources Land Quality Section James D. Simons, P.G., P.E. Michael F. Easley, Governor Director and State Geologist William G. Ross Jr., Secretary November 5, 2004 CERTIFIED MAIL RETURN RECEIPT REQUESTED Mr.Max S. Crowe 1070""Flat Rock`Road Covington, Georgia 30014 RE: Approval to Impound Max C ro_�ue-Dam-,,} o k`Count 041 Dear Mr. Crowe: D NOV 7 5 20 44 WATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE This concerns the subject dam recently. constructed pursuant to issuance of an Approval to Construct on June 3, 2002 as required by the Dam Safety Law of 1967. Record Drawings and the engineer's certification were received on September 13, 2004. The dam was certified by Mr. David Odom, PE. Also, Check No. 1881 in the amount of $1000.00 serving as the additional application processing fee was received on September 10, 2004. An inspection of this dam was made by Land Quality Section staff of the Asheville Regional Office on October 6, 2004. The dam was found to be in general conformance with the approved plans and specifications, and you may impound water. - The Land Quality Section staff will make periodic inspections of this dam to assure that the dam is being maintained in good operating condition. These inspections, however, will be relatively infrequent. It is advised that you closely inspect and monitor your dam, and that you notify your engineer and the Division_of Land Resources if you see or suspect any problems concerning its safety. Sincerely,. Maxwell R. Fowler, PE State Dam Safety Engineer MRF/TVI cc: Mr. Carson Fisher, PE Mr. David Odom, PE ,Mr•:: ForrestW-We`stall, L ern NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Michael F. Easley, Governor William G. Ross, Secretary Division of Land Resources, Land Quality Section Charles H. Gardner, P.G., P.E. Director Richard A. PhilliLp; February 4, 2002 Jack Edwards 474 Serpentine Lane White Oak Mountain Columbus, NC 28722 RE: PLANNED POND/WHITE OAK MOUNTAIN - POLK OUNTY E., Regional Engineer FEB - 4 2002 r� On January 23, 2002, staff from this office visited the site of your planned pond on a tributary to White Oak Upper Lake in Polk County. The height of the dam is planned to be fourteen and one-half feet from the downstream toe to the highest crest of the dam and the surface area of the pond is proposed to be less than one- fourth of an acre. Due to limited downstream development, we have determined a low hazard classification is presently warranted for this dam. Also, since the dam will impound less than ten -acre feet, construction will not require a permit from the this office. However, the following comments are offered: 1. You are encouraged to construct the dam to the same standards as if it were jurisdictional. 2. You should obtain any necessary permits from other agencies. For example, you should contact the US Army Corps of Engineers, NC Wildlife Commission, and the Water Quality Section of this Department. 3. If the land disturbing activity associated with the construction of the dam will be one acre or greater, you must submit a sediment control plan and notarized financial responsibility form along with the appropriate fees to this office. In any case, you must take all necessary steps to prevent sedimentation to the stream or property owned by others during construction and operation of the dam. 4. If the dam is raised such that it is 15 feet in height or greater as measured from the highest point on the crest of the dam and is capable of impounding 10 acre-feet or more it will not be exempt. If this is the case, engineering certification, and record drawings and specifications will be required along with application processing fees. 5. If future downstream development occurs which would be impacted by a failure of the dam, then the hazard classification will need to be re -assessed and could possibly change from low to either intermediate or high hazard classification. By General Statute 143-215.25A.(a)(6), dams which are determined to be high hazard are subject to the provisions of the Dam Safety Law of 1967 regardless of height or impoundment capacity. -i 59 Woodfin Place, Asheville, North Carolina 28801 Telephone 828/251-6208 Fax 828/251-6452 & 828/251-6098 Internet: www.enr.state.nc.us/ENR/ An Equal Opportunity/Affirmative Action Employer - 50% recycled/10% post -consumer paper. Jack Edwards February 4, 2002 Page 2 6. If the impoundment is constructed to be larger than that described in the data sheet you submitted on January 23, 2002, the impact of a potential failure of your dam on the White Oak dams will have to be re-evaluated. If we determine a breach of your dam would threaten any of these high hazard dams during storms up to and including one third of the probable maximum precipitation, your dam will be classified as high hazard and require certification by an engineer. Plans and specifications of the dam, along with an application processing fee, will be required. You may contact Kris Riddle, Max Fowler or me in the at (828) 251-6208 if we may be of additional assistance. Sincerely, 62j Richard A. Phi ips, P.E., Regional Engineer cc: erald Harbinson Forrest Westall, P.E. James K. Leumas, P.E. 59 Woodfin Place, Asheville, North Carolina 28801 Telephone 828/251-6208 Fax 828/251-6452 & 828/251-6098 Internet: www.enr.state.nc.us/ENR/ An Equal Opportunity/Affirmative Action Employer- 50% recycled/10% post -consumer paper ern NCDENR NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Michael F. Easley, Governor William G. Ross, Secretary Division of Land Resources, Land Quality Section Charles H. Gardner, P.G., P.E. Director Richard A. Phillips, P.E., Regional Engineer December 19, 2001 Carl Barkkari 53161 Bruce Hill Drive Shelby Township, MI 48316 RE: POND IN VALHALLA RIDGE SUBDIVISION - POLK COUNTY DEC I g 2001 VJ TE Your letter dated November 27, 2001 concerning the referenced dam is received. The damand impoundment was investigated by staff from this office on September 4, 2001. It was found to be exempt from the Dam Safety Law of 1967 because it was not capable of impounding a volume of ten acre-feet or more. We understand from your most recent correspondence and your letter dated October 11, 2001 that you are concerned by the reduced flow of water at a waterfall on Bear Creek downstream of the dam. However, the dam is on a small tributary to Bear Creek and could not impound the main creek. Moreover, on the day of the inspection, the dam was discharging water through the riser and conduit spillway. Referring to data from the NC Drought Monitoring Council web site, the Tryon, NC area is in a forty -inch rainfall deficit over the past three years. The drought conditions would naturally cause a reduction in the base flow of the creek. Since the Land Quality Section has no jurisdiction over a low hazard impoundment of this size, you may want to contact the US Army Corps of Engineers at (828) 271-7980, or J im Mead with the Division of Water Resources of this Department at (919) 715-5428. We may be reached at (828) 251-6208. Sincerely, A �. Richard A. Phillr s, P.E. Regional Engineer RAP:MRF:a cc- f Leumas, P.E. orest Westall, P.E. Jim Mead 59 Woodfin Place, Asheville, North Carolina 28801 Telephone 828/251-6208 Fax 828/251-6452 & 828/251-6098 Internet: www.enr.state.nc.us/ENR/ An Equal Opportunity/Affirmative Action Employer- 50% recycled/10% post -consumer paper NC®ENR North Carolina Department of Environment and Natural Resources Division of Land Resources Charles H. Gardner, P.G., P.E. Director and State Geologist Dr. Robin V . -Smith 353 H Street, Suite G Chula Vista, California 91910 RE: Approval to Impound Robin Smith Dam County OL -041-H Broad River Basin Dear Dr. Smith: April 3, 2002 Michael F. Easley, Governor William G. Ross Jr., Secretary This concerns the subject dam you recently constructed on a tributary to Little Fall Creek in Polk County pursuant to issuance of.an Approval to Construct on December 5, 2000 as required by the Dam Safety Law of 1967. "As -built" plans and the engineer's certification were received on March 14, 2002. The dam was certified by J. C. Bumgarner, P.E. Also, Check No. 1547 in the amount of $5131.0 serving as the additional application processing fee was received on February 4, 2002. A final inspection of this dam was made by. Land Quality Section staff of the Asheville Regional Office on March 22, 2002. The dam was found to be in general conformance with the approved plans and specifications, and you may impound water. The following maintenance issues should be addressed: 1. The tops of piezometers and monitoring wells should be protected from damage. 2. Sediment should be removed from near the outlets of filter drain pipes with a hand shovel to provide positive drainage. Geological Survey - Land Quality • Geodetic Survey • Center for Geographic Information & Analysis Division of Land Resources • 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina 27604 , 919-733-38331 FAX: 919-715-8801 1 Internet: www.dir.enr. state.nc.0 1dIr.h`m An Equal Opportunity 1 Affirmative Action Employer — 50% recycled 110% Post Consumer Paper i Dr. Robin V. Smith April 3, 2002 Page Two The Maintenance and Inspection Plan and Emergency Action Plan were received from your engineer. These procedures must be followed and copies made available to personnel at the site. The Land Quality Section staff will make periodic inspections of this dam to assure that the dam is being maintained in good operating condition. These inspections, however, will be relatively infrequent. It is advised that you closely inspect and monitor year dam, and that you notify your engineer and the Division of Land Resources if you see or suspect any problems concerning its safety. Sincerely, .Charles H. Gardner, P. G., P. E. 4 CHG/JDS/MRF cc: J.C. Bumgarner, P.E. Richard A. Phillips, P.E. NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Charles H. Gardner, P.G., P.E. Director and State Geologist Land Quality Section April 3, 2002 Mr. Alan Bridge Mr. Kevin Delhanty, 286 Hickory Grove Church Rd. 10606 Rozelles Ferry Rd. Columbus, NC 28722 Charlotte, NC 28214 RE: Approval to Repair Bridge and Delehanty (former Butler) Dam Polk County POLK-018-L Broad River Basin Michael F. Easley, Governor William G. Ross Jr., Secretary FA AP R .. 5 2O0 " Dear Mr Bridge and Mr. Delehanty: This is in response to your submission received on November 6, 2001 of plans, specifications and design data for the repair of the subject dam in Polk_ County on a tributary to Hooper's Creek in compliance with the Daum Safety Law of 1967. These plans, specifications and design data were prepared under the supervision of the United States Department of Agriculture, Natural Resources Conservation Service (NRCS). This letter constitutes approval of the proposalf`to repair the subject dam according to the plans and specifications received by this Division on November 6, 2001, with the following stipulations: 1. Project construction shall be supervised by NRCS. 2. During construction the Division of Land Resources may require such progress reports as are deemed necessary. 3. Upon completion of the project, NRCS shall inspect the . completed work and upon finding (a) that the work has been done as specified, and (b) that the dam is safe, shall file with the Division of Land Resources two sets of "as -built" drawings and a certificate stating that the work has been completed in accordance with approved plans, specifications and other requirements. 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 April 3, 2002 Page 2 4. The reservoir shall be emptied sufficiently to perform the repairs according to NRCS directions. Also, emptying of the lake shall be performed in such a manner as to preclude off - site sedimentation. 5. ' You must notify Mr. Richard A. Phillips, Regional Engineer, Land Quality Section, 59 Woodfin Place, Asheville, NGrth Carolina, 28801, phone (828) 251-6208 ten days before the start of construction. Sincerely, ames D. Simons, PG, PE Chief Engineer, Land Quality JDS/MRF/ CC: Gerald Harbinson, District Conservationist Samuel Bingham, PE, Civil Engineer Forrest Wes�tyal��, Pam: �icharA. Phillips, PE '` NC®ENR North Carolina Department of Environment and Natural Resources Division of Land Resources Charles H. Gardner, P.G., P.E. Land Quality Section Michael F. Easley, Governor Director and State Geologist William G. Ross Jr., Secretary April 9, 2002 MR. David Odom, PE Odom and Associates 152 East Main Street Forest City, North Carolina 28043 RE: Proposed Max Crowe D-am., Polk County_ 'Broa�ic,JRiver Basin Dear Mr. Odom: 'APR ,,1 5 2002 A review has been made of the plans, specifications and design data dated November 2, 2001 and received in this office on November 6, 2001 for the construction of the referenced dam. Prior to issuance of an approval to construct, additional information or revision is requested for the following items: 1. Sheet 1 of 2. Emergency spillways must be located on. natural ground in the abutment. Experience has shown spillways over fill frequently are subject to severe erosion, settlement, and instability from seepage into the channel lining. Should the lining fail, severe damage or complete failure of the embankment is probable. 2. Cross sections of the channel spillway should be provided at critical stations, such as the control seo'tion. The cross sections should show the side slopes and the thickness and type of lining. If rip rap is used, a layer of washed stone is recommended between the rip rap and the geotextile to protect against puncture during installation. 3. Sheet,2 of 2, Cross Section of Embankment at Riser and Barrel. It is preferable not to locate the riser within the fill of the embankment for the following reasons. The -riser may be displaced during compaction or settling of the embankment. Any holes or joint displacement in the riser may result in migration of.embankment material into the riser. Should an upstream slope failure occur such as by rapid draw down of the reservoir, the riser may be damaged. Many times embankment material around a riser is poorly compacted because of fear of damaging the riser. Poor compaction can lead to settlement, slope instability or internal erosion. In addition, should. -replacement of the riser become necessary, it will be more difficult if placed within the embankment. 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • 919-733-4574 / FAX: 919-733-2876 .512 North Salisbury Street, Raleigh,'North Carolina, 27604 . __ _ ._,,:..lii._� ,�, .•'a�� ..�._.. ...-n,��..�� _��:ia'w�i ,�K �..., :.... � Iv%� f"t„Wil.i;fi�Jlii�(f v;i21 Mr. Odum April 9, 2002 Page 2 4. Sheet 2 of 2, Sand Filter. A slotted drainage pipe is recommended to drain the sand filter so that the amount of seepage can be more readily monitored. A varmint guard should be used at the exit. 5. Corrugated metal pipe '(CMP) is indicated in the specifications and corrugated aluminum (CAP) is indicated for the conduit in the drawings. Please revise as necessary. CAP is easily damage during installation. You may�fwaht;t-o"consider using a larger diameter pipe to enable future slip lining and reduce the likelihood of the conduit becoming obstructed by debris when the bottom drain is open or. i f the trash rack fails. 6. A detail drawing must be included showing the joint system for the conduit through the dam. The joints selected must be watertight, structurally adequate and capable of accommodating expected movement during settlement. 7. Appropriate drawings and specifications should be provided for an energy dissipater at the outlet of the pipe spillway. 8. Sheet 2 of-2, Trash Rack. Please provide details of how the trash rack will be attached to the riser. 9. Please specify how the stream will be diverted during construction. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Please contact this office should you have any questions concerning the above items. sincerely, ?amesD. Simons, PE, PG IDS/MRF cc: David Odom, PE orAes westal.l E i-ehat�d=A—Phi 1-1 i ps , PE NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources James D. Simons, P.G., P.E. Land Quality Section Michael F. Easley, Governor Director and State Geologist William G. Ross Jr., Secretary February 26, 2003 Mr. Alan Bridge Mr. Kevin Delhanty 286 Hickory Grove Church Road 10606 Rozelles Ferry Road Columbus, North Carolina 28722 Charlotte, North Carolina 28214 RE: Approval to Impound Bridge and Delhanty Dam PC 1-k Co un-ty� POLK-01:8=L Broad River Basin Dear Mr. Bridge: IWATEER ppUALITi SECTION _AS!1EV LLC REGIONAL-OFF;CE This concerns the subject dam you_r-e-ce-n_tly repaired on a tributary to Hooper'_.s C,re.e.k i_n.,Pol k County pursuant to the Approval to Repair issued on April-3, 2002 as required by the Dam safety Law of 1967. Record Drawings were received on 7anuary 21, 2003 from the Natural Resources Conservation service. Land Quality section staff from the Asheville Regional office made a final inspection of this dam on February 19, 2003. The dam was found to be in general conformance with the approved plans and specifications, and you may impound water. The Land Quality section staff will make periodic inspections of this dam to assure that the dam is being maintained in good operating condition. These inspections, however, will be relatively infrequent. It is advised that you closely inspect and monitor your dam, and that you notify the Natural Resources Conservation Service and the Division of Land Resources if you see or suspect any problems concerning its safety. Sincerely, Maxwell R. Fowler, PE cc: Mr. Howard C. Tew Mr. Gerald Harbinson Mr. Thomas T. Cutts, PE ,,Mr. Samuel C. Bingham, PE Mr..____Forest=-R W_estall.,,. Mr. Richard A. Phillips, PE 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper NCDENR North Carolina Department of Environment and Natura Division of Land Resources James D. Simons, P.G., P.E. Acting Director July 5, 2002 William G. Lapsley, William G. Lapsley P.O. Box 546 Hendersonville, NC RE: English Heifer Polk County POLK-021 PE and Associates 28793 Cove Dam Broad River Basin Dear Mr. Lapsley: Resources AS 9 2002 Michael F. Easley, Governor William G. Ross Jr., Secretary 111 JUL _ 8 2002 9 A review has been made of the plans, specifications and design data submitted under cover letter dated January 17, 2002 and received in this office on January 22, 2002 for the repair.of the referenced dam. Prior to issuance of an approval to repair, additional information or revision is requested for the following items: 1. Onsite inspection on June 12, 2002_by Land Quality staff from the Asheville Regional Office indicated the existing CMP barrel had only slight flow exiting it with most flow going through the temporary corrugated plastic pipe in the right abutment. The elevation of the lake appeared to be above design normal pool. The inlet of the riser was not visible. From this, it would appear that CMP riser and barrel are obstructed. Also, there must be a provision to drain the lake for future maintenance, repairs or emergencies. The condition of the CMP riser and barrel must, be investigated and plans submitted to remove the obstruction and perform any necessary repairs. If it is discovered that the CMP is deteriorated beyond its useful life, this condition must be reported to the Land Quality Section and the riser and/or barrel must either be removed or suitably grouted under the supervision of the engineer. 2. During the inspection it was discovered that some of the toe drain outlets are becoming plugged with deposits and should be cleaned in conjunction with these repairs. 3.Specifications must be supplied for the HDPE pipe and joints to be installed in the in the right abutment. The joints .must be watertight. Geological Survey • Land Quality • Geodetic Survey • Center for Geographic Information & Analysis Division of Land Resources • 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina 27604 919-733-38331 FAX: 919-715-88011 Internet: www.dlr.enr. state.nc.us/dlr.htm An Equal Opportunity 1 Affirmative Action Employer— 50% Recycled 110% Post consumer Paper Mr. Lapsley July 5, 2002 Page 2 4. An earth fill specification must be supplied which contains compaction requirements. Particular care must be exercised to compact around the pipe yet not damage it. It must not be bedded on gravel or other permeable material since this may lead to seepage beside the pipe. 5.A detail drawing of the proposed rip rap apron at the outlet of the new HDPE spillway pipe must be included. The geotextile must be specified along with the size of rip rap. It is suggested that a layer of washed stone be placed between the geotextile and the rip rap to prevent damage to the geotextile during installation or shifting of the rip rap. 6.The trash rack openings at the entrance to the spillway should be small, enough to stop any debris that might become lodged in the pipe, yet large enough to pass small debris such as leaves and small twigs that will pass through the spillway. 7.A specification should be provided for the concrete used in the headwall and its placement., 8. Please provide details of the gate to be installed at the entrance of the emergency spillway. Is the gate needed to limit access of vehicles? If possible, this item should be omitted as it will collect debris during storm events and obstruct the spillway. If the gate is necessary, provisions should be made to facilitate its removal during high flows through the emergency spillway. 9.Have calculations been made to check the frequency of use of the emergency spillway with the proposed new primary spillway? Per the Dam safety Rules, the frequency of use of an unlined emergency spillway in this category dam is the 25-year storm. It would greatly aid further application review if a response to each of the above comments were made in a cover letter submitted with two sets of the revised plans, specifications and design data. Mr. Lapsley, July 5, 2002 Page 3 Please contact Mr 251-6208 or this the above items. IDS/MRF/ . Max Fowler, PE at our Asheville office, (828) office should you have any questions concerning Sincerely, James D. Simons, PE, PG /,chi of Engineer Land Quality Section cc: Three Lakes Preservation, Inc. Forrest Westall �Ri-chard A.�Phi l l-i-p-s; -PE IVIl� NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Charles H. Gardner, P.G., P.E. Director and State Geologist June' 3, 2002 Max Crowe 9790 Farmbrook Lane Alpharetta, Georgia 30022 RE: Approval to Construct Max Crowe Dam Polk County Broad River Basin Dear Mr. Crowe: Land Quality Section Michael F. Easley, Governor William G. Ross Jr., Secretary 'JUN 1 1 2002 ` I NU11 ER 0t1!�1 icy SEGTI�;1SW This is in response to your submission received on November 14, 2001 and May 13, 2002 of plans, specifications and design data for theconstruction of the subject dam in Polk County on the headwaters of Wheat Creek in compliance with the Dam Safety Law of 1967..These plans, specifications and design data were prepared under the supervision of Mr. David Odom, PE. Also, Check No. 2788 in the amount of $200.00 serving as the minimum application processing fee was received on February 18, 2002. This letter constitutes approval of the proposal to construct the subject dam according to the plans and specifications submitted to this Division on May 13, 2002 with the following stipulations: Project construction shall be supervised by Mr. David Odom, PE. 2. During construction the Division of Land Resources may require such progress reports as are deemed necessary. 3. As indicated in the letter from the engineer dated April 30, 2002, Corrugated Metal Pipe will be used for the primary spillway system with no corrugated aluminum pipe (CAP) being used. The construction drawings given to the contractor should be revised where CAP appears. 1612 Mail Service Center, Raleigh, North Carolina 27699-1612 • 919-733-4574 / FAX: 919-733-2876 512 North Salisbury Street, Raleigh, North Carolina, 27604 An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper Mr. Max Crowe June 3, 2002 Page 2 4. Upon completion of the project, David Odom shall inspect the completed work and upon finding (a) and that the work has been done as specified and (b) that the dam is safe, shall file with the Division of Land Resources two sets of "as -built" drawings and a certificate stating that the work has been completed in accordance with approved plans, specifications and other requirements. 5. No water shall be impounded behind the dam until an approval to impound is issued by the Division of Land Resources for operation of this dam. 6. You must notify Mr. Richard A. Phillips, P. E., Regional Engineer, Land Quality Section, 59 Woodfin Place, Asheville, North Carolina 28801, telephone number (828) 251-6208 ten days before the start of construction. I am enclosing a copy of a cost certification form and an explanation of the final processing fee calculation. An additional fee will be required when the engineer's certification is submitted if the construction cost exceeds $10,001.00. fn any event, the cost certification must be completed and returned with the engineer's certification before an approval to impound can be processed: The Dam Safety Law of 1967 requires that project construction commence within one year from the date of this approval, or the approval is void. James D. Simons, PE, PG Enclosures cc: David Odom, PE :Forrest Westall, PE Richard A. Phillips, PE MEMORANDUM TO: John Dor'ney Regional Contact: Wanda Frazier. Non -Discharge Branch WQ Supervisor: Forrest Westall Date: SUBJECT:, WETLAND STAFF REPORT AND RECOMMENDATIONS -� -- Facility'NAmel Max Crowe 11 ounty FOLK [ProfJect Number1 �' IW49 _ County2 Recud From APP IRegion' Asheville; --- - Receled ,Date 111/14/O1 , Recvd By Regions Project TypDain Design ------- ----- -- Certificates Stream ` Stream Impacts (ft.) -- — ,_ _ -.---� ---� � - . I-------. ; , °Class.. -� �—�-- -rmit!'Wetlandl 1Netland Wetland Stream Acres Feet Pe h Type Type Impact Score IndexSupp. Basin Req. Req. Type Wetland _ _ Mitigation Type_ ; Type',1_ Acres 4I Feet Is -Wetland Rating Sheet Attached? O Y ON Did you request more info? p Y p N Have Project Changes/Conditions Been Discussed With Applicant? O Y ON Is Mitigation required? O Y ON Recommendation: O Issuer p Issue/Cond O Deny Provided by Region: Latitude (ddmmss) I Longitude (ddmmss) Comments: I- • . - •I . •I "WMUI! 11. ••I. . -I I! 1 -- • 1- --. 11- -- ► �- �- -1 -.11 1 •• • - I 1- • 11!- ► �- "1 1 -- '1 -I -1� 11 �•I� 1! ► I I• 11!- • ►- -1! cc: - Regional Office Page Number 1 Central Office NCDENR North Carolina Department of Environment and Natural Resources Division of Land Resources Charles H. Gardner, P.G., P.E. Director and State Geologist December 6, 2001 Mr. Max Crowe 9790 Farmbrook Lane Alpharetta, Georgia 30022 RE: Max Crowe Dam Polk County Dear Mr. Crowe: Michael F. Easley, Governor William G. Ross Jr., Secretary This is to acknowledge receipt of your application dated November 1, 2001 for the construction of the subject dam. The application was received in our office on November 14, 2001. The minimum application processing fee of $200.00 was not�ncluded with the application. Per North Carolina Administrative Code Title 15A, DENR Subchapter 2K .0222-. APPLICATION PROCESSING FEES, the minimum application fee of $200.00 must be received prior to review of,. the subject dam. Also, three additional sets of plans and specifications should be sent to this office according to North Carolina Administrative Code Title 1.5A, DENR Subchapter 2K .0200- OBTAINING APPROVAL FOR DAM CONSTRUCTION: REPAIR: OR REMOVAL (e). I have enclosed information regarding payment of the additional application processing, fee which is required if the actual cost of construction of the dam is greater than $10,001.00. Applications requiring an approval to construct a dam will be reviewed by this office. We endeavor to respond to applications within 60 days of receipt of the application. Due to our current workload, however, please be advised that it may take considerably longer than 60 days to respond. Please contact Mr. Richard Phillips, P. E., Regional Engineer at telephone number (828) 251- 6208; Mr. James K. Leumas, State Dam Safety Engineer; Ms. Tami V. Idol, Assistant State Dam Safety Engineer or me at telephone number (919) 733-4574 should you have any questions concerning this matter. Geological Survey - Land Quality - Geodetic Survey - Center for Geographic Information & Analysis Division of Land Resources -1612 Mail Service Center, Raleigh, North Carolina 27699-1612 512 North Salisbury Street, Raleigh, North Carolina 27604 919-733-38331 FAX: 919-715-8801 1 Internet: www.dlr.enr. state. nc.usldlr.htm An Equal Opportunity 1 Affirmative Action Employer — 50% Recycled 110% Post Consumer Paper Sincerely, ames W. Caldwell, E. I. Assistant State Dam Safety Engineer Land Quality Section JWC/ Enclosure cc: Mr. Richard Phillips, P. E. Mr-.-Forrest-West -I-, P`E: , Mr. David Odom, P. E. Triage Check List FEB 2 5 2002 I �/ Date: z/2e)/z- / 2 w R5) WATER ASfiEViLti`: _i n •', ' i To: ❑RRO Steve Mrie11 Project Name �AaN/cl GL�-(��. ❑FRO Ken Ave. LLe DWQ Proje t Number ❑WaRO Debcrrh Sa-'wyer County ❑WiRO Joanne St..,.—nhuis ❑WSRO Jennifer Frye RO Mike Pa?< ❑MRO Pete From: c! )�i' _ - Telephone (919) 733- a - The file attached is being forward to you for your evaluation. Please call if you need assistance. ❑ Stream length bmpa-a ted ❑ Stream determkiaf-= ❑ Wetland detemr:>-�D--on s� c5s�Lance to blue -line surface waters on USGW topo m_ aps XMinimizadordavco -jce ❑ Buffer Rules (Na--,--, Ta-P—a-nOco, Catawba, Randleman) ❑ Pond fill f p ❑ Mitigation Rafia r ❑ Ditching t ❑ Are the sir;. �x'�d mrf'aavon sites available an viable?/ ' ❑ Check dra-Mrx:s kr afar ❑ Is the appica-bm with pre -application meetings? ❑ Cumulatr1e knpar 6 -- -_ Comments . _ --.— _; `art r.�.,•b'_�i'��r-. � _. = - -='s-ic:_ •�,'�K:%�t��� =-���'=,_ - a�`� -= - . - _ .. _ ---.-.r.-, � —'". ... __ -- _..-- ����_`"��� _-��-"s=���.�it�"'-.:-;C Kti'.;a���y. y%w:.�`::rY-. �^�.^--`a'c�;:�'•'±'!u fix? . _ - _=fir r= .�..-��. - ---•-- _ .. �.- --._ - - �= - . - '- �.� EW .+�. �-.tea-�a� .,:Ar _ -.._ . • . _ 1 .L _ - 0 11 ..7 4! 9 fC ENGINEERING IETOR,T POND AND DAM DESIGN ° Prepared for: Max Crowe September, 2001 Prepared by: { Odom &Associates Engineering, Inc. 152 East Main Street Forest City, North Carolina 28043 Table of Contents Tableof Contents.................................................................................................................2 ProjectDescription ........................ ............. :......................................................................... 3 Soils.....................................................................................................................................3 SupportingCalculations.......................................................................................................4 Figure 1: 2-Year Storm Event Hydrograph.....................................................................5 Figure 2: 2-Year Storm Event Non -Routed and Routed Hydrographs ............................7 Figure 3: SCS Peak Discharge Method for a 50-Year Storm Event.................................9 Figure 4: 50-Year Storm Event Hydrograph.....................:...........................................11 Figure 5: 50-Year Storm Event Non -Routed and Routed Hydrographs ........................13 Figure 6: Maximum Water Elevation Due to a 50-year Storm Event ...........................15 Figure 7: Outflow Capability Based on Water Elevation..............................................17 Figure_8: Buoyancy Calculations...................................................................................19 AppendixA: Specifications...............................................................................................21 Appendix B: PCN Application Form................................................................................25 Appendix C: Erosion Control Plan & Financial Responsibility Form..............................38 IkI Proiect Description The purpose of this project is to construct a small pond along the eastern edge 'of Polk County, North Carolina. The dam is of sufficient size to require permitting by the state, and will be classified as a low hazard class, small dam. The elevations shown on the drawing are based on an assumed datum and do not reflect the true elevation above sea level. Based on the assumed datum, the spillway discharges the flow a..an--elevation-of-Ao4 eet with a top of dam elevation of 439 feet thus resulting in an effective dam height of 25 feet. The top of water elevation wi be 436 feet resulting m a total pond area of approximately six and one-half 6.50 acres) Assuming the average depth of the oxdU.equal to 40% of the dam height (i.e., 10 feet), the pond size in acre-feet would be65.0 acre-feet. Regarding the actual design of the dam, the upstream embankment will be a 2:1 slope and the downstream embankment will have a 3:1 slope for ease of maintenance. The emergency spillway is a 50-foot wide channel placed in the crest of the dam and is 1.0 feet deep. The channel will be lined with rip rap placed on top of filter fabric to prevent erosion should the emergency spillway be utilized. Soils Soil studies will be performed on -site by the engineer at the time of excavation. 3 .. Supporting Calculations The following calculations were performed using both a spreadsheet designed to calculate storm flows as well as the program "Hydroflow Hydrographs". The spreadsheet was designed to calculate the storm flows based on the SCS method of floodwater runoff. The values obtained from the spreadsheet were then used in the Hydroflow program to design the spillways size(s). Included in this section is a copy of the spreadsheet output as well as four graphs from the Hydroflow program displaying the hydrograph of the routed and non -routed. storm flows, water surface elevation vs. time, and discharge capability vs. water elevation. Based on the derived information, the 50- year storm event can be carried in the emergency spillway comprised of a 50-foot, wide trench 1.0 feet deep lined with rip rap. Lastly, a spreadsheet was created to calculate the necessary weight required to offset the buoyancy of the standpipe. The above information is located on the following pages. 4 Figure 1: 2-Year Storm Event Hydrograuh The following hydrograph displays the discharge (in cubic feet per second) due to a 2- year storm event. The information used to plot this hydrograph was derived in the Hydroflow program. W Wydrograph Plot Hyd. No. 1 Max Crowe 2-Yr Storm Hydrograph type Storm frequency Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 2 yrs = 178.63 ac = 3.8 % = LAG = 4.50 in = 24 hrs English Peak discharge = 46.46 cfs Time interval = 6 min Curve number = 55 Hydraulic length = 2500 ft Time of conc. (Tc) = 66.7 min Distribution = Type II Shape factor = 484 Total Volume = 490,005 cult 1 - SCS Runoff - 2 Yr - Qp = 46.46 cfs 50 4 0 3 0 2 0 1 10 15 20 25 30 Time (hrs) / Hyd. 1 U 0 0 0 5 Figure 2: 2-Year Storm Event Non -Routed and Routed Hydrogranhs The following hydrograph displays both the 2-year storm not routed through the pond as well as the 2-year storm routed through the pond. When routed, the peak flow due to the 2-year storm is 9.79 cubic feet per second. Complying with state design criteria, the 2- year storm event can be handled by the primary spillway comprised of 12" and 18" pipe. V/ . Hydrograph Plot Hyd. No. 3 Hydrograph type = Reservoir Peak discharge Storm frequency = 2 yrs Time interval Inflow. hyd. No. = 1 Reservoir name Max. Elevation = 436.78 ft Max. Storage Storage Indication method used. English = 9.79 cfs = 6 min = Max Crowe Pond = 215,580 tuft Total Volume = 489,925 cult 3 - Reservoir - 2 Yr - Qp = 9'.79 cfs 50 CY 40 60 80 100 Time (hrs) / Hyd. 1 / Hyd. 3 40 30 Figure 3: SCS Peak Discharge Method for a 50-Year Storm Event Storm Flow Calculation Utilizing the SCS Peak Discharge Method Polk County, North Carolina This document calculates the flow for a 50-year, 24-hour storm event in Polk County, North Carolina, using the SCS method. The area in question is comprised of approximately 178.63 acres of land with a soil classification of B. The hydraulic length (maximum length of water flow) is approximately 2500 feet with an average slope of 3.8%. The land in this area has the following characteristics:. Type Description of Terrain % of Total CN Value Type I Wooded 100% 55 Type it None Listed N/A N/A Type III None Listed N/A N/A Type IV None Listed N/A N/A Type V None Listed WA N/A In addition to the above information, data must be extracted from tables that can be found in the 'Erosion and Sediment Control Planning and Design Manual' published by the North, Carolina Department of Environment and Natural Resources. All references in the equations below refer to this manual. Based on the soil and land types listed above, the CN can now be calculated. Based .on the given information as well as chosen CN values from Table 8.03b, page 8.03.10 in the reference, the final CN value is calculated to be: Type Description of Terrain % of Total CN Value % Total x CN Value Type Wooded 100% 55 55 Type II None Listed N/A N/A N/A Please Note: The column "% Total x CN Type III None Listed N/A N/A N/A Value" is summed to give the Final CN Type IV None Listed N/A N/A N/A value Type V None Listed N/A N/A N/A Final CN Value >>> 55 Based on the area in question (Polk County, North Carolina), the rainfall amount during a 50-year, 24-hour storm is 8 inches (Reference, Figure 8.03). In addition, the average runoff depth is 2.9 inches (Reference, Page 8.03.17, Table 8.03c). Lastly, the equivalent drainage area based on the hydraulic length of 2500 feet is 65 acres (Reference, Page 8.03.18, Figure 8.03p). Determining Q We first determine our peak discharge (33 CFS/Inch) using Table 8.03p, and multiply it by our runoff depth of 2.9 inches to get our initial flow. Q, = 33 CFS/Inch x 2.9 inches = 95.7 CFS The following equation takes into account the equivalent acreage vs. the actual acreage based on the hydraulic length. Q2 = 95.7 CFS x (178.63acres/65acres) = 263 CFS We will next use the impervious factor of 1 (Reference, Page 8.03.21, Figure 8.03r) to modify the flow. Q3 = 263 CFS x 1 = 263 CFS To adjust for the, watershed slope, we will use a slope adjustment factor of 0.9 (Reference, Page 8.03.23, Table 8.03d) Q4 = 263 CFS x 0.9 = 236.7 CFS Lastly, we must adjust for any ponding effects impacting our flow with an adjustment factor of 1 (Reference, Page 8.03.24, Table 8.03e) Q = 236.7 CFS x 1 = 236.7 CFS Summary Based on the above equations and adjustment factors found in the reference, the flow for a 50-year, 24-hour storm event in this particular area of Polk County, North Carolina, would be 236.7 CFS. I Figure 4: 50-Year Storm Event Hydrograuh The following hydrograph displays the discharge (in cubic feet per second) due to a 50- year storm event. The information used to plot this hydrograph was derived in the Hydroflow program. Since the peak flow value was roughly the same using the Hydroflow program (233.86 cfs vs. 236.7 cfs), this value was used in all additional calculations. 11 t Hydrograph Plot Hyd. No. 2 Max Crowe 50-Yr Storm Hydrograph type Storm frequency Drainage area Basin Slope Tc method Total precip. Storm duration = SCS Runoff = 50 yrs = 178.63 ac = 3.8 % = LAG = 8.00 in = 24 hrs English Peak discharge = 233.86 cfs Time interval = 6 min Curve number = 55 Hydraulic length = 2500 ft Time of conc. (Tc) = 66.7 min Distribution = Type II . Shape factor = 484 Total Volume = 1,837,517 cult 2 SCS Runoff - 50 Yr - Qp = 233.86 cfs 250 200--- A 15 0 CJ 10 0 5 0 5 20 25 30 Time (hrs) / Hyd. 2 0 0 5 10 1 Figure 5: 50-Year Storm Event Non -Routed and Routed Hydromphs The following hydrograph displays both the 50-year storm not routed through the pond as well as the 50-year storm routed through the pond. When routed, the peak flow due to the 50-year storm is 99.24 cubic feet per second. Complying with state design criteria, the 50-year storm event (99.24 CFS) can be routed through the combination of the primary spillway comprised of 12" and 18" pipes and the emergency spillway comprised of a rip rap lined 50'x1.0' channel. 13 .9 Hydrograph Plot Hyd. No. 4 Hydrograph type = Reservoir Storm frequency = 50 yrs Inflow hyd. No. = 2 Max. Elevation = 438.69 ft Storage Indication method used. Peak discharge Time interval Reservoir name Max. Storage English = 99.24 cfs = 6 min = Max Crowe Pond = 792,112 cuft Total Volume = 1,837,372 cuft 4 - Reservoir - 50 Yr - Qp = 99.24 cfs 250 20 15 CJ 10 50- 40 50 60 Time (hrs) / Hyd, 2 / Hyd. 4 l 0 I 0 0 i 0 0 10 20 30 Figure 6: Maximum Water Elevation Due to a 50-year Storm Event The following chart displays the maximum water elevation during a 50-year storm event. This procedure was performed to assure no overtopping of the dam would occur in the event of such a storm. Overtopping of the dam could potentially lead to severe erosion and possibly dam failure. 15 Hydrograph Plot Hyd. No. 4 Hydrograph type Storm frequency Inflow hyd. No. Max. Elevation Storage Indication method used. = Reservoir = 50 yrs = 2 = 438.69 ft Peak discharge Time interval Reservoir name Max. Storage English = 99.24 cfs = 6 min = Max Crowe Pond = 792,112 cult Total Volume = 1,837,372 cuft 4 - Reservoir - 50 Yr - Max. El. = 438.69 ft 439.0 438. 437. m w 437. 436. 436. 20 30 40 50 60 Time (hrs) 4 B 2 "o 0 0 10 20 30 40 50 6� Figure 7: Outflow Capabilitv Based on Water Elevation The following chart displays the maximum flow capacity of the entire piping system (primary and emergency) based on the water elevation above the spillway. 17 Max Crowe Pond 3.0 Total 2 5 / Culy A 2.0 / Culy B 1.5 / Culy C -u / Culy D 1.0 Weir 0.5 / Weir B / Weir C 0.00 50 100 150 / Weir D Discharge (cfs) Fi2ure 8: Buoyancy Calculations 19 Anti -Flotation Calculations The following information is a calculation to determine the necessary area and weight required to offset the buoyancy force of the standpipe in dam construction. The exact displacement is calculated and then a safety factor is used to determine the final weight and concrete volume required. These calculations are based on the average value of concrete density of 150 pcf. In this scenario, the standpipe diameter is 18 inches with a total length of 20 feet. Below is the calculation of the displaced water volume, weight of the water in pounds, and the cubic yards of concrete required to offset this buoyancy force. Displaced Water Volume V = (pi)(r2)(I) _ Weight of Displaced Water W = (V)(density) = Required Volume of Concrete V = (wreight)/(density)(27 cf/cy) = (pi][0.75 ft][0.75 ft][20 ft] = 35.3 cubic feet (35.3 ct][62.4 pcf] = 2205.4 pounds [2205.4 lbs]/j150 pct][27 cf/cy] = 0.5445 cubic yards Now that we have the exact figure to offset the buoyancy force, we can now apply the chosen safety factor of 1.25 to determine the volume of concrete required. V = (initial volume)(safety factor) = [0.5445 cy][1.251= 0.6807 cubic yards Appendix A: Specifications 21 SMALL DAM CONSTRUCTION SPECIFICATIONS 1. SITE PREPARATION The site shall be shaped and prepared prior to the placement of earth fill. Once the clearing and grubbing limits have been identified, all trees, stumps, logs, snags, shrubs, rubbish, and debris shall be removed. Trees shall be cut as near to the ground as conventional equipment will permit. All stumps and roots having a diameter of one inch or greater shall be grubbed out to a depth of one foot below the ground surface. Any fences encountered within the grubbing limits shall be removed as part of the clearing and grubbing operation. All material removed as part of the clearing and grubbing operation shall be burned. All disposal of material by burning shall be in strict accordance with applicable state law and local ordinance. All channel banks and steep areas within the foundation area of the dam shall be shaped to a slope of 1:1 or flatter. The foundation shall be stripped of topsoil and undesirable material. After stripping, the foundation area shall be prepared to assure proper bond with the fill material by removing loose dry material, scarifying, disking, adjusting the moisture, and compacting the foundation material as necessary, prior to the placement of the fill material. 2. EXCAVATION The cutoff trench shall be excavated to remove and sand, gravel, and other permeable material. The actual depth of the cutoff trench shall be determined in the field by the engineer to ensure all unsatisfactory material is removed. Suitable materials obtained from the required excavations may be used in the embankment. Unsuitable material shall be disposed of in an area designated by the engineer. 3. EARTH FILL All fill material shall be free from sod, brush, roots, frozen soil, rocks over 6 inches in diameter and other objectionable material. The distribution and gradation of materials shall be such that there will be no lenses, pockets, streaks, or layers of material differing substantially in texture or gradation. The more plastic and impervious material shall be placed in the center portions of the fill. Fill shall not be placed until the foundation area is free of standing water and is properly grubbed, shaped, and scarified. The moisture content of the fill material shall be such that the fill can be satisfactorily compacted and shall be within plus or minus 3% of optimum. Optimum moisture shall be as defined by ASTM D 698, Method A. The placing and spreading of fill shall be started at the lowest point of the foundation and shall be brought up in approximately horizontal layers. The maximum thickness of a layer before compaction shall be 8 inches. The entire surface of each layer shall be compacted by at least three passes of a standard tamping roller. Fill placed within two feet of the pipe or any structure shall be placed in layers not to exceed four inches thick and compacted to a density equivalent to that of the surrounding fill by means of hand tampering or manually directed power tampers. Heavy equipment shall not be operated within two feet of any structure. 22 4. PIPE SPILLWAY The spillway barrel and riser pipe will be 14 gauge CMP and 12 gauge CMP, respectively. Fabrication and installation of the pipe spillway shall be as specified on the drawings and as required by specification: The pipe conduit shall be placed on a firm foundation to the lines and grades shown on the plans. Installation shall be performed in a skillful and workmanlike manner in accordance with the manufacturer0s recommendations. Prior to laying the pipe, a foundation trench shall be prepared for the pipe by filling approximately two inches above grade' with compacted material. The foundation area for the pipe shall then be excavated to approximately 1 inch below the planned invert elevation for the pipe and shaped to conform to the outside diameter of the pipe. One inch of select impervious moist material shall be placed in the shaped foundation trench immediately prior to placing the pipe. The pipe shall then be placed to line and grade and firmly and uniformly bedded in the foundation trench throughout its entire length with select impervious moist fill material. The area supporting the joints shall be over excavated as necessary to allow for assembly and to ensure that the pipe barrel is uniformly supported by the soil bedding. Select moist backfill material shall be placed and hand compacted around the pipe conduit at approximately the same rate on both sides of the pipe. Compaction around the bottom half of the pipe must be firm to fill all voids, but extreme caution must be exercised to prevent damage, movement, uplift or deflection of the pipe. 5. DRAIN FILL- N/A 6. DRAIN PIPE- N/A 7. SEEDING - Subsoil shall be prepared to eliminate uneven areas and low spots. Lines, levels, profiles and contours must be maintained. Make changes in grade gradual and bend slopes into level areas. Remove foreign materials, weeds and undesirable plants and their roots and remove any contaminated sub -soil. Scarify subsoil to a depth of 3 inches where topsoil is to be places. Repeat cultivation in areas where equipment used for hauling and spreading topsoil has compacted the sub -soil. Spread topsoil to a minimum depth of 8 inches over area to be seeded and rake until smooth. Place the topsoil during dry weather and on unfrozen subgrade. Remove vegetable matter and foreign non -organic material from topsoil while spreading. Grade the topsoil to eliminate rough, low or soft areas and to ensure positive drainage. Install edging at periphery of seeded areas in straight lines to consistent depth. 23 SEEDING SPECIFICATIONS PERMANENT SEEDING GRASS LINED CHANNELS TallFescue..........................................................................................................175-200 lb/ac KentuckyBluegrass..............................................................................................:...... 20 lb/ac Rye............................................................................................................................... 40 lb/ac Lime......................................................................................................................... 4000 lb/ac 10-10-10 fertilizer....................................................................................................1200 lb/ac Straw........................................................................................................................ 4000 lb/ac ALL OTHER SURACES TallFescue.................................................................................................................130 lb/ac Kobelespedeza............................................................................................................10 lb/ac Rye............................................................................................................................... 40 lb/ac Lime........................................................................................................................4000 lb/ac 10-10-10 fertilizer....................................................................................................1000 lb/ac Straw........................................................................................................................ 4000 lb/ac TEMPORARY SEEDING SUMMER (May 15-Aug 15) Germanmillet.............................................................................................................. 40 lb/ac FALL (Aug 15-Dec 15) Rye(grain).................................................................................................................120 lb/ac WINTER/EARLY SPRING (Feb 1-May 15) Rye(grain).................................................................................................................120 lb/ac Koreanlespedeza.........................................................................................................50 lb/ac Lime......................................................................................................................... 2000 lb/ac 10-10-10..................................................................................................................... 750 lb/ac 24 Appendix B: PCN Application Form 25 L9 r��pRPS GFF Pre -Construction Notification (PCN) Application Form. For Section 404 and/or Section 10 Nationwide, Regional and General Permits, Section 401 General Water Quality Certifications, and Riparian Buffer and Watershed Buffer Rules This form is to be used for projects qualifying for any of the U.S. Army Corps of Engineers' (USACE) Nationwide, Regional or General Permits as required by Section 404 of the Clean Water Act and/or Section 10 of the Rivers and Harbors Act, and for the North Carolina Division of Water Quality's (DWQ) associated General 401 Water Quality Certifications. This form is also to be used for any project requiring approval under any Riparian Buffer Rules implemented by the.N.C. Division of Water Quality. This form should not be used if you are requesting an Individual 404 Permit or Individual 401 Water Quality Certification. The USACE Individual Permit application form is available online at http://www.saw.usace.aMly.mil/wetlands/Perm app htm. The USACE is the lead regulatory agency. To review the requirements for the use of Nationwide, Regional or General permits, and to determine which permit applies to your project, please go to the USACE website at http://www.saw.usace.army.mil/wetlands/relatour.htm, or contact one of the field offices listed at the end of this application. The website also lists the responsible project manager for each county in North Carolina and provides additional information regarding the identification and regulation of wetlands and waters of the U.S. The DWQ issues a corresponding Certification (General or Individual), and cannot tell the applicant which 401 Certification will apply until the 404 Permit type has been determined by the USACE. Applicants are encouraged to visit DWQ's 401/Wetlands Unit website at http://h2o.enr.state.nc.us/ncwetlands to read about current requirements for the 401 Water Quality Certification Program and to determine whether or not Riparian Buffer Rules are applicable. The applicant is also advised to read the full text of the General Certification (GC) matching the specific 404 Permit requested. In some cases, written approval for some General Certifications is not required, provided that the applicant adheres to all conditions of the GC. Applicants lacking access to the internet should contact DWQ's Central Office in Raleigh at (919) 733-1786. Trout Waters Coordination - Special coordination with the North Carolina Wildlife Resources Commission (NCWRC) is also required for projects. occurring in any of North Carolina's twenty-five counties that contain trout waters. In such cases, the applicant should contact the appropriate NCWRC regional coordinator' (listed by county on the last page of this application). Page 1 of 12 CAMA Coordination - If the project occurs in any of North Carolina's twenty coastal counties (listed on the last page of this application) the applicant should also contact the North Carolina Division of Coastal Management (DCM) at (919) 733-2293. DCM will determine whether or not the project involves a designated Area of Environmental Concern, in which case DCM will act as the lead permitting agency. In such cases, DCM will require a Coastal Area Management Act (CAMA) Permit and will coordinate the 404/401 Permits. USACE Permits - Submit one copy of this form, along with supporting narratives, maps, data forms, photos, etc. to the applicable USACE Regulatory Field Office (addresses are listed at the end of this application). Upon receipt of an application, the USACE will determine if the application is complete as soon as possible, not to exceed 30 days. This PCN form is designed for the convenience of the applicant to address information needs for all USACE Nationwide, Regional or General permits, as well as information required for State authorizations, certifications, and coordination. Fully providing the information requested on this form will result in a complete application for any of the USACE Nationwide, Regional or General permits. To review the minimum amount of information that must be provided for a complete PCN for each USACE Nationwide permit, see Condition 13, 65 Fed.Reg. 12893 (March 9, 2000), available at http://www.saw.usace.army.mil/wetlands/nmTfinalFedReg.pdf.. Processing times vary by permit and begin once the application has been determined to be complete. Please contact the appropriate regulatory field office for specific answers to permit processing periods. 401 Water Quality Certification or Buffer Rules - All information is required unless otherwise stated as optional. Incomplete applications will be returned. Submit seven collated copies of all USACE Permit materials to the Division of Water Quality, 401/Wetlands Unit, 1650 Mail Service Center, Raleigh, NC, 27699-1650. If written approval is required or specifically requested for a 401 Certification, then a non-refundable application fee is required. In brief, if project impacts include less than one acre of cumulative wetland/water impacts and less than 150 feet cumulative impacts to streams, then a fee of $200 is required. If either of these thresholds is exceeded, then a fee of $475 is required. A check made out to the North Carolina Division of Water Quality, with the specific name of the project or applicant identified, should be stapled to the front of the application package. For more information, see the DWQ website at http://h2o.ehnr.state.nc.us/newetlands/fees.html. The fee must be attached with the application unless the applicant is a federal agency in which case the check may be issued from a separate office. In such cases, the project must be identifiable on the U.S. Treasury check so that it can be credited to the appropriate project. If written approval is sought solely for Buffer Rules, the application fee does not apply, and the applicant should clearly state (in a cover letter) that only Buffer Rule approval is sought in writing. Wetlands or waters of the U.S. may not be impacted prior to issuance or waiver of a Section 401 Water Quality Certification. Upon receipt of a complete application for a 401 Certification, the Division of Water Quality has 60 days to prepare a written response to the applicant. This may include a 401 Certification, an on -hold letter pending receipt of additional requested information, or denial. Page 2 of 12 Office Use Only: Form Version April 2001 USACE Action ID No. DWQ ND 11749 If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A" rather than leaving the space blank. I. Processing Check all of the approval(s) requested for this project: ® Section 404 Permit ❑ Section 10 Permit ® 401 Water Quality Certification ❑ Riparian or Watershed Buffer Rules 2. Nationwide, Regional or General Permit Number(s) Requested: Nationwide 39 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ❑ 4. If payment into the North Carolina Wetlands Restoration Program (NCWRP) is proposed for mitigation of impacts (see section VIII — Mitigation), check here: ❑ II. Applicant Information 1. Owner/Applicant Information Name: Max Crowe Mailing Address: 9790 Farm Brook Lane Alpharette Georgia 30022 Telephone Number: (404) 442-5011 Fax Number: (404) 442-5088 E-mail Address: 2. Agent Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Company Affiliation: Odom & Associates Mailing Address: 152 East Main Street Forest City North Carolina 28043 Telephone Number: (828) 247-4495 Fax Number: (828) 247-4498 E-mail Address: Page 3 of 12 III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: Max Crowe Dam Design 2. T.I.P. Project Number (NCDOT Only): 3. Property Identification Number (Tax PIN): 4. Location County: Polk Nearest Town: Columbus Subdivision name (include phase/lot number): N/A Directions to site (include road numbers, landmarks, etc.): corn RtuU e"o.rf CO. Take hiahwav 74 west towards Polk Countv. Take the Pea Ridge Road exit and turn left. SK l ;2y 513-72"4) 5. Site coordinates, if available (UTM or Lat/Long): 14 (L �d l�� a ? (Note — If project is linear, such as a road or utility e, attach a sheet that separate li J e coordinates for each crossing of a distinct waterbody.) 6. Describe the existing land use or condition of the site at the time of this application: Currently the land is not used. 7. Property size (acres): 24.55 8. Nearest body of water (stream/river/sound/ocean/lake): Wheat Creek 9. River Basin: Broad (Note — this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.ne.us/admin/maps/.) Page 4 of 12 10. Describe the purpose of the proposed work: To build a dam creating a pond for aesthetic purposes 11. List the type of equipment to be used to construct the project: dozer, front end loader, compactor 12. Describe the land use in the vicinity of this project: rural/residential IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. N/A V. Future Project Plans Are any additional permit requests anticipated for this project in the future? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application: N/A VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. The applicant must also provide justification for these impacts in Section VII below. All proposed impacts, permanent and temporary, must be listed herein, and must be clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) must be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream Page 5 of 12 mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Wetland Impacts Wetland Impact Site Number (indicate on ma) Type of Impact* Area of Impact (acres) Located within 100-year Floodplain** es/no) Distance to Nearest Stream (linear feet) Type of Wetland*** N/A T i.isi eacn impact separately and identify temporary impacts. Impacts include, but are not limited to: mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. ** 100-Year floodplains are identified through the Federal Emergency Management Agency's (FEMA) Flood Insurance Rate Maps (FIRM), or FEMA-approved local floodplain maps. Maps are available through the FEMA Map Service Center at 1-800-358-9616, or online at httn://www.fema.gov. *** List a wetland type that best describes wetland to be impacted (e.g., freshwater/saltwater marsh, forested wetland, beaver pond, Carolina Bay, bog, etc.) List the total acreage (estimated) of existing wetlands on the property: Total area of wetland impact proposed: 2. Stream Impacts, including all intermittent and perennial streams Stream Impact Site Number (indicate on ma) Type of Impact* Length of Impact (linear feet) Stream Name** Average Width of Stream Before Impact Perennial or Intermittent? (please seci ) 1 Culvert 140 Wheat Creek 2 ft. Perennial 2 Ponding 1300 Wheat Creek 2 ft. Perennial 1.1s4 cacn impact separately and identity temporary impacts. Impacts include, but are not limited to: culverts and associated rip -rap, dams (separately list impacts due to both structure and flooding), relocation (include linear feet before and after, and net loss/gain), stabilization activities (cement wall, rip -rap, crib wall, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. ** Stream names can be found on USGS topographic maps. If a stream has no name, list as UT (unnamed tributary) to the dearest downstream named stream into which it flows. USGS maps are available through the USGS at 1-800-358-9616, or online at w r.uses. ov. Several internet sites also allow direct download and printing of USGS maps (e.g., www.topozone.com, www.mapquest.com, etc.). Cumulative impacts (linear distance in feet) to all streams on site: 1440 Page 6 of 12 3. Open Water Impacts, including Lakes, Ponds, Estuaries, Sounds, Atlantic Ocean and any other Water of the U.S. Open Water Impact Site Number (indicate on ma) Type of Impact* � pact Area of Impact pact (acres) Name p Waterbody (if applicable) Type of Waterbody (lake, pond, estuary, sound, bay, ocean, etc.) N/A List each impact separately and identify temporary impacts. Impacts include, but are not limited to: fill, excavation, dredging, flooding, drainage, bulkheads, etc. 4. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ❑ uplands ® stream ❑ wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw -down valve or spillway, etc.): dam/embankment Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): aesthetic Size of watershed draining to pond: 178 acres Expected pond surface area: 6.5 acres VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower -impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The purpose of construction was for aesthetic purposes No other options were possible to gain similar effects. Page 7 of 12 VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projeAsnvoj-iing-greatenthan-oreequal to one acre of impacts_to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial §trearns. USACE — In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on March 9, 2000, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application lacking a required mitigation plan or NCWRP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetlands/stn-ngide.html. 1. Pro ' e-a_b_rief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not 1 m t d to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a s,p/paste sheet if more space is needed. Page 8 of 12 2. Mitigation may also be made by payment into the North Carolina Wetlands Restoration Program (NCWRP) with the NCWRP's written agreement. Check the box indicating that you would like to pay into the NCWRP. Please note that payment into the NCWRP must be reviewed and approved before it can be used to satisfy mitigation requirements. Applicants will be notified early in the review process by the 401/Wetlands Unit if payment into the NCWRP is available as an option. For additional information regarding the application process for the NCWRP, check the NCWRP website at hlt2://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCWRP is proposed, please check the appropriate box on page three and provide the following information: Amount of stream mitigation requested (linear feet): N/A Amount of buffer mitigation requested (square feet): N/A Amount of Riparian wetland mitigation requested (acres): N/A Amount of Non -riparian wetland mitigation requested (acres): N/A Amount of Coastal wetland mitigation requested (acres): N/A IX. Environmental Documentation (DWQ Only) Does the project involve an expenditure of public funds or the use of public (federal/state/local) land? Yes ❑ No If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether a NEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ❑ No If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ❑ No X. Proposed Impacts on Riparian and Watershed Buffers (DWQ Only) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Meuse), 15A NCAC 2B .0259 (Tar -Pamlico), 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify N/A )? Page 9 of 12 Yes ❑ No ❑ If you answered "yes", provide the following information: Identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact (square feet) Multiplier Required Mitigation 1 3 2 1.5 Total - Lone i extends out 3U feet perpendicular from near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Conservation Easement, Riparian Buffer Restoration / Enhancement, Preservation or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or .0260. N/A XI. Stormwater (DWQ Only) Describe impervious acreage (both existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. N/A XII. Sewage Disposal (DWQ Only) Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from the proposed project, or available capacity of the subject facility. N/A XIII. Violations (DWQ Only) Is this site in violation of DWQ Wetland Rules (15A NCAC 211.0500) or any Buffer Rules? Yes ❑ - No Is this an after -the -fact permit application? Yes ❑ 'No Page 10 of 12 f-A. XIV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw -down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). N/A pplicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) US Army Corps Of Engineers Field Offices and County Coverage Asheville Regulatory Field Office Alexander Cherokee Iredell Mitchell US Army Corps of Engineers Avery Clay Jackson Polk 151 Patton Avenue Buncombe Cleveland Lincoln Rowan Room 208 Burke Gaston Macon Rutherford Asheville, NC 28801-5006 Cabarrus Graham Madison Stanley Telephone: (828) 2714854 Caldwell Haywood McDowell Swain Fax: (828) 2714858 Catawba Henderson Mecklenburg Transylvania Raleigh Regulatory Field Office Alamance Durham Johnston Rockingham US Army Corps Of Engineers Alleghany Edgecombe Lee Stokes 6508 Falls of the Neuse Road Ashe Franklin Nash Surry Suite 120 Caswell Forsyth Northampton Vance Raleigh, NC 27615 Chatham Granville Orange Wake Telephone: (919) 876-8441 Davidson Guilford Person Warren Fax: (919) 876-5283 Davie Halifax Randolph Wilkes Washington Regulatory Field Office Beaufort Currituck Jones US Army Corps Of Engineers Bertie Dare Lenoir Post Office Box 1000 Camden Gates Martin Washington, NC 27889-1000 Carteret* Green Pamlico Telephone: (252) 975-1616 Chowan Hertford Pasquotank Fax: (252) 975-1399 Craven Hyde Perquimans Wilmington Regulatory Field Office Anson Duplin Onslow US Army Corps Of Engineers Bladen Harnett Pender Post Office Box 1890 Brunswick Hoke Richmond Wilmington, NC 28402-1890 Carteret Montgomery Robeson Telephone: (910) 251-4511 Columbus Moore Sampson Pitt Tyrrell Washington Wayne Union Watauga Yancey Wilson Yadkin *Croatan National Forest Only Page 11 of 12 Fax:. (910) 251-4025 Cumberland New Hanover Scotland US Fish and Wildlife '.Service / National Marine Fisheries Service US Fish and Wildlife Service US Fish and Wildlife Service National Marine Fisheries Service Raleigh Field Office Asheville Field Office Habitat Conservation Division Post Office Box 33726 160 Zillicoa Street Pivers Island Raleigh, NC 27636-3726 Asheville, NC 28801 Beaufort, NC 28516 Telephone: (919) 856-4520 Telephone: (828) 665-1195 Telephone: (252) 728=5090 Division of Water Quality 401 Wetlands Unit 1650 Mail Service Center Raleigh, NC 27699-1650 Telephone: (919) 733-1786 Fax: (919) 733-9959 North Carolina State Agencies Division of Water Quality Wetlands Restoration Program 1619 Mail Service Center Raleigh, NC 276994619 Telephone: (919) 733-5208 Fax: (919) 733-5321 CAMA and NC Coastal Counties State Historic Preservation Office Department Of Cultural Resources 4617 Mail Service Center Raleigh, NC 276994617 Telephone: (919) 7334763 Fax: (919).715-2671 Division of Coastal Management Beaufort Chowan Hertford Pasquotank 1638 Mail Service Center Bertie Craven Hyde Pender Raleigh, NC 27699-1638 Brunswick Currituck New Hanover Perquimans Telephone: (919) 733-2293 Camden Dare Onslow Tyrrell Fax: (919) 733-1495 Carteret Gates Pamlico Washington NCWRC and NC Trout Counties Western Piedmont Region Coordinator Alleghany Caldwell Watauga 3855 Idlewild Road Ashe Mitchell Wilkes Kernersville, NC 27284-9180 Avery Stokes Telephone: (336) 769-9453 Burke Surry Mountain Region Coordinator Buncombe Henderson Polk 20830 Great Smoky Mtn. Expressway Cherokee Jackson Rutherford Waynesville, NC 28786 Clay Macon Swain . Telephone: (828) 452-2546 Graham Madison Transylvania Fax: (828) 506-1754 Haywood McDowell Yancey Page 12 of 12 Appendix C: Erosion Control Plan & Financial Responsibility Form 38 EROSION AND SEDIMENTATION CONTROL PLAN MAX CROWE DAM OWNER: MAX CROWE Polk County, North Carolina Odom E associates eng i nee-ri ng, i nc. 152 East Main Street Forest City, North Carolina 28043 (828)247-4495 iL TABLE OF CONTENTS PAGE Narrative............................................................................................................ 1 SupportingCalculations................................................................................. 2-3 Financial Responsibility/Ownership Form.....................................................4-5 Site Erosion and Sedimentation Control Plan ..................................... Enclosure NOTE: The reference used in this plan is the "Erosion and Sediment Control Planning and Design Manual." All figures, graphs, tables, and calculations used were derived from this reference except where specifically indicated. NARRATIVE PROJECT DESCRIPTION The purpose of the project is to construct a dam on the eastern edge of Polk County. Approximately 6 acres will be disturbed during this construction period. SITE DESCRIPTION The site is 24.55 acres located on the eastern edge of Polk County. ADJACENT PROPERTY Land use in the immediate vicinity is rural/residential. SOILS The soils in the project area are determined to be classified as Soil Group C utilizing the table on page 8.03.8 of the reference. According to a U.S. Department of Agriculture Soil Conservation Service survey of the area, most of the topsoil is clayey loam. MAINTENANCE RESPONSIBILITY The owner is responsible for ensuring compliance with temporary measures and for instituting permanent measures. SUPPORTING CALCULATIONS I. RUNOFF Runoff was determined using the Rational Method as explained in the manual. We determined the acreage contributing runoff using the Quadrangle Map. The value for the Runoff Coefficient (C) was taken from Table 8.03a in the manual. The land surrounding the dam construction is wooded and has a C value of 0.20. A return period of 25 years and the rainfall intensity duration curve for Asheville was used in the design. The governing equation is Q=C*I*A. Data for calculations is below: C AREA ac I in/hr Q cfs TSP #1 0.4 0.6 7.2 1.7 TSP #2 0.4 0.16 7.2 0.5 TSP #3 0.4 0.15 7.2 0.4 TSP #4 0.4 0.2 7.2 0.6 TSP #5 0.4 0.18 7.2 0.5 TSP #6 0.4 1.96 7.2 5.6 TSP #7 0.4 0.67 7.2 1.9 TSP #8 0.4 1.41 7.2 4.1 TSP #9 1 0.4 0.39 1 7.2 1.1 TSP #10 1 0.4 0.39 1 7.2 1 1.1 v IV. SEDIMENT TRAPS There will be five temporary sediment traps utilized on the project. In accordance with Section 6.60 of the reference, the temporary sediment traps are to be used below disturbed areas where the total drainage area is less than 5 acres. They are sized for a volume of 1800 ft3/acre based on the disturbed area draining into the basin. Weir lengths are based on drainage area. All traps will have an effective depth of 2'. For improved efficiencies, larger surface areas are used with the following equation as guidance: Surface Area (ac.) = (0.01) peak inflow rate (cfs). Q Disturbed Draina a Min. Vol. Surface Vol. Width Length Weir cfs Area Ac. Area Ac.) (cu.ft.) Areas .ft. Avail. cu.ft. ft ft ft TSP #1 1.7 0.6 0.6 990 753 1505 19 39 7 TSP #2 0.5 0.2 0.2 288 201 401 10 20 6 TSP #3 0.4 0.2 0.2 270 188 376 10 19 6 TSP #4 0.6 0.2 0.2 360 251 502 11 22 6 TSP #5 0.5 0.2 0.2 324 226 452 11 21 6 fi u FINANCIAL RESPONSIBILITY/OWNERSHIP FORM SEDIMENTATION POLLUTION CONTROL ACT No person may initiate any land -disturbing activity on one or more contiguous acres as covered by the Act before this form and an acceptable erosion and sedimentation control plan have been completed and approved by the Land Quality Section, N.C. Department of Natural Resources and Community Development. (Please type or print and, if question is not applicable, place N/A in the blank.) Part A 1. Project Name: Max Crowe Dam 2. Location of land -disturbing activity: County Polk , City or Township Polk , and Highway / Street Highway 108. 3. Approximate date land -disturbing activity will be commenced: ASAP 4. Purpose of development (residential, commercial, industrial, etc.): Residential 5. Approximate acreage of land to be disturbed or uncovered: 6.11 acres 6. Amount of fee enclosed: $ 280 7. Has an erosion and sedimentation control plan been filed? Yes X No Enclosed X 8. Person to contact should sediment control issues arise during land -disturbing activity. Name Chris Waters Telephone (828) 2474495 9. Landowner(s) of Record (Use blank page to list additional owners.): Max Crow Name(s) 9790 Farm Brook Lane Mailing Address Street Address Alpharetta Georiga 30022 City State Zip 404) 442-5011 Telephone 10. Recorded in Deed Book No. Page No. City Telephone State Zip Part B. 1. Person(s) or firm(s) who are financially responsible for this land -disturbing activity (Use the blank page to list additional persons or firms): Same as item 9 Name of Person(s) or Firm(s) Mailing Address City Telephone Street Address State Zip City Telephone State Zip 2. (a) If the Financially Responsible Party is not a resident of North Carolina, give name and street address of the North Carolina Agent. N/A Name Mailing Address City State Zip Telephone Street Address City State Zip Telephone (b) If the Financially Responsible Party is Partnership or other person engaging in business under an assumed name, attach a copy of the certificate of assumed name. If the Financially Responsible Person is a Corporation, give the name and street address of the Registered Agent: N/A Name of Registered Agent Mailing Address City Telephone Street Address State Zip City Telephone State Zip The above information is true and correct to the best of my knowledge and belief and was provided by me under oath. (This form must be signed by the financially responsible person if anindividual or his attorney -in -fact or if not an individual by an officer, director, partner, or registered agent with authority to execute instruments for the financially responsible person). I agree to provide corrected information should there be any change in the information provided herein. T�rnmnt 044 Signature Owrt -r� Title or Authority Date I, t B • "WiVA , a Notary Public of the County of Ckajdox , State of North Carolina, hereby certify that O W 4C, appeared personally before me this day and being duly sworn acknowledged that the above form was executed by him. 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