Early Notice and Public Review of a Proposed
Activity in a 100-Year Floodplain
To: All Interested Government Agencies, Groups and Individuals
This is to give notice that the US Department of Housing and Urban Development (HUD) under 24 CFR Part 50 has determined that the following proposed action, under Section 221 (d)(4) - New Construction of the National Housing Act, FHA #000-35550, is located in the 100-Year floodplain, and HUD will be identifying and evaluating practicable alternatives to locating the proposed action in the floodplain and the potential impacts on the floodplain from the proposed action, as required by Executive Order 11988, in accordance with HUD regulations at 24 CFR 55.20 Subpart C - Procedures for Making Determinations on Floodplain Management and Protection of Wetlands. The proposed action, which will be known as Addison Row, is a 321-unit apartment project in Capitol Heights, Prince George's County, Maryland. The proposed development occupies 24.97 acres of land located north of Addison Road and west of North Englewood Drive at address 4800 Addison Road in Capitol Heights, Prince George's County, Maryland.
Beaver Dam Creek runs along the north property line, and a 100-year floodplain extends along this water body as determined by FPS #200143. An existing 36" storm drain outfall is located within the 100-year floodplain. The portion of the outfall within the floodplain consists of approximately 11.9 linear feet of 36" underground reinforced concrete pipe, a 47-foot long and 10-foot high headwall, and approximately 2,260 sf of riprap.
The proposed development plans to utilize this existing outfall for the storm drain/storm-water management outfall. The County requires the proposed development to provide 100-year flood control for the site. Thus, the proposed storm drain system must be designed to convey the 100-year storm. To do so, the existing outfall pipe must be upsized. The existing pipe ranges in depth from about 10 feet below existing grade at the headwall to about 14 feet deep at the manhole outside the floodplain. To replace the pipe, a trench will be excavated approximately 4 feet wide and 10-14 feet deep (the portion of trench within the floodplain will be 10-11' deep). Track and skid steer excavators will be used to dig the trench and the excavation will be laid back at a 2:1 slope from the trench edge. Both the existing 36" pipe and 48" diameter manhole will be removed. The existing headwall will remain in place, and a larger hole will be cut in the wall to accommodate the new 48" pipe. A new manhole will be installed outside the floodplain, and a new 48" reinforced concrete pipe will be installed. The trench will be backfilled, and the grade will be restored to its previous condition and stabilized. The existing riprap will be cleaned to remove depositional sediment. Additional riprap may be added to ensure a stable and non-erosive outfall. The total limit of disturbance within the floodplain is approximately 2,592 sf. The disturbance is temporary, and no permanent modifications will be made to the floodplain.
There are three primary purposes for this notice. First, people who may be affected by activities in floodplain and those who have an interest in the protection of the natural environment should be given an opportunity to express their concerns and provide information about these areas. Commenters are encouraged to offer alternative sites outside of the floodplain, alternative methods to serve the same project purpose, and methods to minimize and mitigate impacts. Second, an adequate public notice program can be an important public educational tool. The dissemination of information and request for public comment about floodplains can facilitate and enhance Federal efforts to reduce the risks and impacts associated with the occupancy and modification of these special areas. Third, as a matter of fairness, when the Federal government determines it will participate in actions taking place in a floodplain, it must inform those who may be put at greater or continued risk.
Written comments must be received by HUD no later than May 1, 2018. They should be addressed to: Stacey Ashmore, Production Division Director, or Michael Dillon, Senior Appraiser, U.S. Department of Housing and Urban Development, Northeast Region, 26 Federal Plaza, New York, New York 10278-0068, (212) 264-1277 or (212) 542-7730. Comments may also be submitted via email at Stacey.L.Ashmore@hud.gov or Michael.Dillon@hud.gov. Office hours are M-F 8:00 am to 4:30 pm.
Date: April 10, 2018