Common use of Floodplain Impacts Clause in Contracts

Floodplain Impacts. Determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2 Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA mapped floodplains. Include the panel number. 18.4 Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 The reasons why the proposed action must be located in the floodplain; 18.9.2 The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 A. • Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2 • Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 . • Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 . • Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 . • Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 . • Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 . • Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include DocuSign Envelope ID: 81680129-218F-4A62-86EE-68C3C135A630 exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 . • For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 . • If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 : o The reasons why the proposed action must be located in the floodplain; 18.9.2 ; o The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall must fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 a. Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740. 18.2 b. Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 c. Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 d. Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 e. Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 f. Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 g. Where an encroachment or support of incompatible floodplain development results in impacts, the report shall must provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l1) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall must include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall must include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 h. For each alternative encroaching on a designated or regulatory floodplain, the report shall must provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall must discuss the consistency of the action with the regulatory floodplain. In addition, the report shall mustl DocuSign Envelope ID: B4E47CBB-54AA-4467-B86B-B1C47B94F45E document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 i. If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall must include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall must refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall must document compliance with the Executive Order 11988 requirements and shall must be supported by the following information: 18.9.1 1) The reasons why the proposed action must be located in the floodplain; 18.9.2 2) The alternatives considered and why they were not practicable; and 18.9.3 3) A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 A.  Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2  Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 .  Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 .  Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 .  Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 .  Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 .  Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 .  For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the DocuSign Envelope ID: FEE70723-A887-4BCC-92B5-33508013EFFC regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 .  If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 : o The reasons why the proposed action must be located in the floodplain; 18.9.2 ; o The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 A. • Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2 • Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 . • Identify the presence and nature (e.g., zone Zone A, zone Zone AE, zone Zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 . • Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 . • Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 . • Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 . • Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l1) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives concept (up to four (4)) to the structure or to the significant encroachment. The report shall include exhibits which display the No Build and Build alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 . • For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a DocuSign Envelope ID: AAC8E920-9951-40B4-B77C-DDDA5AE10FF9 regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 . • If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 : o The reasons why the proposed action must be located in the floodplain; 18.9.2 ; o The alternatives (4 max.) considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 A.  Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2  Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 .  Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 .  Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 .  Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 .  Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 .  Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 .  For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the DocuSign Envelope ID: B3F57688-319D-4340-876F-E11B399F9D4B regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 .  If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 : o The reasons why the proposed action must be located in the floodplain; 18.9.2 ; o The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Environmental Impacts of the Proposed Project section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 a. Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740. 18.2 b. Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 c. Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 d. Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 e. Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 f. Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 g. Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a DocuSign Envelope ID: B951F3F6-E6BB-4D9E-AFCF-6ACF0EF5B3D9 particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 h. For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 i. If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 1) The reasons why the proposed action must be located in the floodplain; 18.9.2 2) The alternatives considered and why they were not practicable; and 18.9.3 3) A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E17511044752518C-4424-B7324800-4D7AA370-B9EB-6E4CC5D3774037F1574D7CC0 18.2 Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA mapped floodplains. Include the panel number. 18.4 Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 The reasons why the proposed action must be located in the floodplain; 18.9.2 The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 A. • Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2 • Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 . • Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 . • Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 . • Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 . • Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 . • Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports DocuSign Envelope ID: E7DAA847-BF7C-44E6-B32B-712DD5062C72 incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 . • For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 . • If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 : o The reasons why the proposed action must be located in the floodplain; 18.9.2 ; o The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) as listed in the Affected Environment and Environmental Consequences section of the EA.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A. 18.1 A.  Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740 18.2  Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 .  Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 .  Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 .  Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 .  Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 .  Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports DocuSign Envelope ID: 32531276-D54D-42BA-B8CD-1FFE51D0946F incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 .  For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 .  If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 : o The reasons why the proposed action must be located in the floodplain; 18.9.2 ; o The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine (This scope is for the corresponding section(s) of the Water Resources Technical Report.) The Engineer shall determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission (IBWC) requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A.A. DocuSign Envelope ID: 719137B1-7E3D-42BC-8A29-9D6AE732CB6A 18.1 a. Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740. 18.2 b. Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 c. Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA Federal Emergency Management Agency (FEMA) mapped floodplains. Include the panel number. 18.4 d. Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 e. Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 f. Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 g. Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 h. For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 i. If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 1) The reasons why the proposed action must be located in the floodplain;; DocuSign Envelope ID: 719137B1-7E3D-42BC-8A29-9D6AE732CB6A 18.9.2 2) The alternatives considered and why they were not practicable; and 18.9.3 3) A statement indicating whether the action conforms to applicable state or local floodplain protection standards;

Floodplain Impacts. Determine whether the Transportation Activity has the potential to affect floodplains. Document Trinity River Corridor Development Certificate Regulatory Zone requirements (Dallas and Fort Worth Districts), and International Boundary Water Commission requirements (Transportation Activity within the floodplain of the Rio Grande) if the project is within the area covered by these regulations. Studies for floodplain impacts shall fulfill the requirements of Executive Order 11988 and 23 CFR §650, Subpart A., 18.1 Briefly describe the watershed characteristics of the study area in terms of land uses and changes in land use that may affect stream discharge. DocuSign Envelope ID: E1751104-B732-4D7A-B9EB-6E4CC5D37740. 18.2 19.2 Briefly describe the streams in the study area, including evidence of stream migration, down cutting, or aggradations. 18.3 19.3 Identify the presence and nature (e.g., zone A, zone AE, zone AE with floodway) of any FEMA mapped floodplains. Include the panel number. 18.4 19.4 Indicate the existence of any significant development associated with the mapped area and identify the jurisdiction responsible for the floodplain. 18.5 19.5 Identify the locations where an alternative will encroach on the base (100-year) floodplain ("encroachments"), where an alternative will support incompatible floodplain development and the potential impacts of encroachments and floodplain development. This identification should be included in the text and on a map. 18.6 19.6 Include a list of all jurisdictions having control over floodplains for each alternative. 18.7 19.7 Where an encroachment or support of incompatible floodplain development results in impacts, the report shall provide more detailed information on the location, impacts and appropriate mitigation measures. In addition, if any alternative (l) results in a floodplain encroachment or supports incompatible floodplain development having significant impacts, or (2) requires a commitment to a particular structure size or type, the report shall include an evaluation and discussion of practicable alternatives to the structure or to the significant encroachment. The report shall include exhibits which display the alternatives, the base floodplains and, where applicable, the regulatory floodplains. 18.8 For each alternative encroaching on a designated or regulatory floodplain, the report shall provide a preliminary indication of whether the encroachment would be consistent with or require a revision to the regulatory floodplain. If the preferred alternative encroaches on a regulatory floodplain, the report shall discuss the consistency of the action with the regulatory floodplain. In addition, the report shall document coordination with FEMA and local or state agencies with jurisdiction indicating that revision would be acceptable or that a revision is not required. 18.9 If the preferred alternative includes a floodplain encroachment having significant impacts, the report shall include a finding that it is the only practicable alternative as required by 23 CFR §650, Subpart A. The finding shall refer to Executive Order 11988 and 23 CFR §650, Subpart A. In such cases the report shall document compliance with the Executive Order 11988 requirements and shall be supported by the following information: 18.9.1 The reasons why the proposed action must be located in the floodplain; 18.9.2 The alternatives considered and why they were not practicable; and 18.9.3 A statement indicating whether the action conforms to applicable state or local floodplain protection standards;or