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<br />Federal Emergency Management Agency
<br />Washington, D.C. 20472
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<br />CERTIFIED MAIL
<br />RETURN RECEIPT REQUESTED
<br />
<br />IN REPLY REFER TO:
<br />Case No,: 95-08-140P
<br />
<br />The Honorable Leona Stoecker
<br />Mayor, City of Longmont
<br />Civic Center Complex
<br />350 Kimbark Street
<br />Longmont, Colorado 80501
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<br />Community: City of Longmont, Colorado
<br />Community No,: 080027
<br />Panels Affected: 08013C0269 F and 0270 F
<br />Effective Date of
<br />This Revision: JUN 1 91995
<br />
<br />102-I-A-C
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<br />Dear Mayor Stoecker:
<br />
<br />This is in response to a request for a revision to the effective Flood Insurance Study (FIS) and National
<br />Flood Insurance Program (NFIP) map for your community, Specifically, this responds to a letter dated
<br />May 8, 1995, from Ms, Teresa Rae Lineback, P,E., Senior Project Engineer, Hurst & Associates, Inc.,
<br />regarding the effective FIS report and Flood Insurance Rate Map (FIRM) for Boulder County, Colorado
<br />and Incorporated Areas, With her May 8 letter, Ms, Lineback submitted additional data to support her
<br />April 7, 1995, request for a Letter of Map Revision (LOMR), Ms, Lineback requested that we revise
<br />the effective FIRM to show the effects of channel improvements from downstream of a private road to
<br />approximately 1,450 feet downstream of Airport Road, and the construction of four 12-foot by 8-foot box
<br />culverts at Airport Road along Dry Creek No, 1, This request follows up on a Conditional Letter of Map
<br />Revision, which was issued on April 28, 1993, The south side of Dry Creek No, 1, from approximately
<br />900 feet downstream of Airport Road to Schlagel Road, has been annexed by the City of Longmont.
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<br />All data required to complete our review of this request were submitted with Ms, Lineback's April 7 and
<br />May 8 letters, All fees necessary to process this LOMR, a total of $1,810, have been received,
<br />
<br />We have completed our review of the submitted data and the flood data shown on the effective FIRM,
<br />and have revised the FIRM to modify the elevations and floodplain boundary delineations of a flood
<br />having a I-percent chance of being equaled or exceeded in any given year (base flood) along Dry Creek
<br />No, 1, from approximately 1,800 feet downstream of the private road to approximately 1,450 feet
<br />downstream of Airport Road, As a result of this project, the base flood elevations (BFEs) increased
<br />along this reach of Dry Creek No.1 from approximately 900 feet downstream to approximately 675 feet
<br />upstream of Airport Road, The maximum increase of 1 foot occurred approximately 140 feet upstream
<br />of Airport Road, The reach containing the increased BFEs is on the requester's property, The BFEs
<br />decreased from approximately 1,800 feet downstream of the private road to approximately 675 feet
<br />upstream of Airport Road, The maximum decrease in BFEs, 1 foot, occurred approximately 1,800 feet
<br />downstream of the private road, The width of the Special Flood Hazard Area (SFHA) decreased along
<br />the entire revised reach and the SFHA shifted to the south, Along the south bank, the SFHA increased
<br />from approximately 375 feet to approximately 425 feet downstream of Airport Road and from
<br />approximately 950 feet to approximately 1,100 feet downstream of Airport Road, The maximum
<br />increase, 70 feet, occurred approximately 400 feet downstream of Airport Road, The maximum decrease
<br />in the SFHA, 950 feet, occurred immediately upstream of Airport Road.
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